/* roulang page: index */
:root {
            --night: #0B0C0D;
            --night-soft: #121315;
            --night-card: #181A1C;
            --cloud: #F2F0E9;
            --mist: #C8CDD0;
            --mist-dim: #8F989E;
            --gold: #C49A4B;
            --gold-bright: #D9AC5F;
            --gold-dim: #8F6F37;
            --amber: #B8822F;
            --red-dark: #8C2F2A;
            --orange-dark: #B65F2B;
            --border-faint: rgba(242, 240, 233, 0.08);
            --border-light: rgba(242, 240, 233, 0.15);
            --border-mist: rgba(200, 205, 208, 0.28);
            --radius-sm: 2px;
            --radius-md: 4px;
            --radius-lg: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 0 0 1px rgba(196, 154, 75, 0.25), 0 24px 48px rgba(0, 0, 0, 0.45);
            --shadow-btn: 0 8px 24px rgba(196, 154, 75, 0.18);
            --font-serif: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', serif;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', '思源黑体', system-ui, sans-serif;
            --font-display: 'Oswald', 'Bebas Neue', 'Noto Sans SC', sans-serif;
            --transition-smooth: cubic-bezier(0.22, 0.61, 0.36, 1);
            --gutter-x: 2rem;
            --gutter-y: 3rem;
            --nav-height: 72px;
            --section-pad-desktop: 96px;
            --section-pad-mobile: 56px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--mist);
            background-color: var(--night);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s var(--transition-smooth), border-color 0.3s var(--transition-smooth), background-color 0.3s var(--transition-smooth);
        }

        a:hover {
            color: var(--gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus,
        a:focus,
        input:focus,
        textarea:focus,
        select:focus {
            outline: 2px solid var(--gold);
            outline-offset: 3px;
        }

        ::selection {
            background-color: var(--gold);
            color: var(--night);
        }

        .container {
            max-width: 1320px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .section-pad {
            padding-top: var(--section-pad-desktop);
            padding-bottom: var(--section-pad-desktop);
        }

        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--gold);
            border: 1px solid rgba(196, 154, 75, 0.4);
            padding: 0.35rem 0.9rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1.25rem;
            font-weight: 500;
        }

        .section-title {
            font-family: var(--font-serif);
            font-weight: 800;
            font-size: clamp(2rem, 4.5vw, 3.5rem);
            line-height: 1.08;
            color: var(--cloud);
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }

        .section-subtitle {
            font-size: 1.05rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.7;
            max-width: 720px;
            margin-bottom: 2.5rem;
        }

        /* ============ NAVBAR ============ */
        .kaiyun-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            height: var(--nav-height);
            background: rgba(10, 11, 13, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: border-color 0.4s var(--transition-smooth), background-color 0.4s var(--transition-smooth);
        }

        .kaiyun-navbar.scrolled {
            border-bottom-color: rgba(242, 240, 233, 0.08);
            background: rgba(10, 11, 13, 0.92);
        }

        .navbar-brand-logo {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.01em;
            color: var(--cloud);
            white-space: nowrap;
        }

        .navbar-brand-logo span {
            color: var(--gold);
        }

        .navbar-brand-logo:hover {
            color: var(--cloud);
        }

        .navbar .nav-link {
            font-family: var(--font-sans);
            font-size: 0.9rem;
            font-weight: 400;
            letter-spacing: 0.05em;
            color: var(--mist);
            padding: 0.5rem 0.9rem;
            position: relative;
            transition: color 0.3s var(--transition-smooth);
            white-space: nowrap;
        }

        .navbar .nav-link::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 1px;
            background-color: var(--gold);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s var(--transition-smooth);
        }

        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: var(--cloud);
        }

        .navbar .nav-link:hover::after,
        .navbar .nav-link.active::after {
            transform: scaleX(1);
        }

        .navbar .nav-link.active {
            color: var(--gold);
        }

        .lang-switch-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            height: 32px;
            padding: 0 0.9rem;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(242, 240, 233, 0.25);
            font-size: 0.78rem;
            letter-spacing: 0.04em;
            color: var(--mist);
            white-space: nowrap;
            transition: all 0.3s var(--transition-smooth);
        }

        .lang-switch-pill .lang-active {
            color: var(--night);
            background-color: var(--gold);
            padding: 0.1rem 0.45rem;
            border-radius: var(--radius-pill);
            font-weight: 600;
        }

        .lang-switch-pill:hover {
            border-color: rgba(196, 154, 75, 0.6);
            color: var(--cloud);
        }

        .btn-kaiyun-nav {
            display: inline-block;
            padding: 0.55rem 1.3rem;
            border-radius: var(--radius-sm);
            background-color: var(--gold);
            color: var(--night);
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.04em;
            transition: all 0.3s var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-kaiyun-nav:hover {
            background-color: var(--gold-bright);
            color: var(--night);
            transform: translateY(-1px);
            box-shadow: var(--shadow-btn);
        }

        .navbar-toggler {
            border: 1px solid rgba(242, 240, 233, 0.2);
            padding: 0.4rem 0.6rem;
            border-radius: var(--radius-sm);
            background: transparent;
        }

        .navbar-toggler-icon {
            background-image: none;
            position: relative;
            width: 24px;
            height: 2px;
            background-color: var(--cloud);
            display: block;
        }

        .navbar-toggler-icon::before,
        .navbar-toggler-icon::after {
            content: '';
            position: absolute;
            left: 0;
            width: 24px;
            height: 2px;
            background-color: var(--cloud);
            transition: transform 0.3s var(--transition-smooth);
        }

        .navbar-toggler-icon::before {
            top: -7px;
        }

        .navbar-toggler-icon::after {
            bottom: -7px;
        }

        .navbar-collapse {
            transition: all 0.35s var(--transition-smooth);
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                position: fixed;
                top: var(--nav-height);
                right: 0;
                width: min(85vw, 380px);
                height: calc(100vh - var(--nav-height));
                background: var(--night);
                border-left: 1px solid var(--border-faint);
                padding: 1.5rem;
                transform: translateX(100%);
                z-index: 1029;
                display: block;
                overflow-y: auto;
                transition: transform 0.35s var(--transition-smooth);
            }

            .navbar-collapse.show {
                transform: translateX(0);
            }

            .navbar-collapse .navbar-nav {
                flex-direction: column;
                gap: 0.8rem;
                padding-top: 1rem;
            }

            .navbar-collapse .nav-link {
                font-size: 1.1rem;
                padding: 0.7rem 0.3rem;
            }

            .mobile-lang-wrapper {
                margin-top: auto;
                padding-top: 1.5rem;
                border-top: 1px solid var(--border-faint);
            }
        }

        @media (min-width: 992px) {
            .navbar-collapse {
                display: flex !important;
                transform: none !important;
                position: static;
                width: auto;
                height: auto;
                background: transparent;
                border: none;
                padding: 0;
            }

            .mobile-lang-wrapper {
                display: none;
            }
        }

        /* ============ HERO ============ */
        .kaiyun-hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            border-top: 8px solid #000;
            border-bottom: 10px solid #000;
        }

        .kaiyun-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(11, 12, 13, 0.55) 0%, rgba(11, 12, 13, 0.8) 60%, rgba(11, 12, 13, 0.92) 100%);
            z-index: 1;
        }

        .kaiyun-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 12, 13, 0.3);
            z-index: 1;
            pointer-events: none;
            mix-blend-mode: multiply;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 3rem 0;
        }

        .hero-tag {
            display: inline-block;
            font-size: 0.8rem;
            letter-spacing: 0.15em;
            text-transform: uppercase;
            color: rgba(242, 240, 233, 0.7);
            border: 1px solid rgba(196, 154, 75, 0.5);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1.5rem;
            background: rgba(11, 12, 13, 0.5);
            backdrop-filter: blur(6px);
            animation: heroFadeUp 0.7s var(--transition-smooth) 0.1s both;
        }

        .hero-title {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: clamp(2.8rem, 7vw, 6rem);
            line-height: 1.02;
            color: var(--cloud);
            letter-spacing: -0.025em;
            margin-bottom: 1.25rem;
            text-shadow: 0 2px 30px rgba(0, 0, 0, 0.6);
            animation: heroFadeUp 0.7s var(--transition-smooth) 0.2s both;
        }

        .hero-title .gold-accent {
            color: var(--gold);
            display: block;
            font-size: clamp(2rem, 5vw, 4rem);
            letter-spacing: 0.04em;
        }

        .hero-subtitle {
            font-size: clamp(1rem, 1.4vw, 1.2rem);
            font-weight: 300;
            color: var(--mist);
            max-width: 640px;
            line-height: 1.75;
            margin-bottom: 2.2rem;
            animation: heroFadeUp 0.7s var(--transition-smooth) 0.32s both;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2.5rem;
            animation: heroFadeUp 0.7s var(--transition-smooth) 0.44s both;
        }

        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 1.8rem;
            background-color: var(--gold);
            color: var(--night);
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            border: none;
            transition: all 0.3s var(--transition-smooth);
            letter-spacing: 0.02em;
        }

        .btn-hero-primary:hover {
            background-color: var(--gold-bright);
            color: var(--night);
            transform: translateY(-1px);
            box-shadow: var(--shadow-btn);
        }

        .btn-hero-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 1.8rem;
            background: transparent;
            color: var(--cloud);
            font-weight: 500;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(242, 240, 233, 0.3);
            transition: all 0.3s var(--transition-smooth);
            letter-spacing: 0.02em;
        }

        .btn-hero-secondary:hover {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(196, 154, 75, 0.06);
            transform: translateY(-1px);
        }

        .hero-invite-panel {
            background: rgba(11, 12, 13, 0.75);
            border: 1px solid rgba(242, 240, 233, 0.12);
            border-radius: var(--radius-lg);
            padding: 1.5rem 1.8rem;
            backdrop-filter: blur(8px);
            max-width: 560px;
            animation: heroFadeUp 0.7s var(--transition-smooth) 0.56s both;
        }

        .hero-invite-panel .invite-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--cloud);
            letter-spacing: 0.06em;
            margin-bottom: 0.8rem;
        }

        .hero-invite-panel .invite-reward {
            font-size: 0.85rem;
            color: var(--mist-dim);
            margin-bottom: 1rem;
            line-height: 1.6;
        }

        .hero-progress {
            height: 6px;
            background: rgba(242, 240, 233, 0.1);
            border-radius: var(--radius-pill);
            overflow: hidden;
            margin-bottom: 0.6rem;
        }

        .hero-progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--gold-dim), var(--gold), var(--gold-bright));
            border-radius: var(--radius-pill);
            width: 68%;
            transition: width 1.2s var(--transition-smooth);
        }

        .hero-progress-label {
            display: flex;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--mist-dim);
            letter-spacing: 0.03em;
        }

        .hero-stats-divider {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(242, 240, 233, 0.1);
            animation: heroFadeUp 0.7s var(--transition-smooth) 0.68s both;
        }

        .hero-stat-item {
            font-size: 0.8rem;
            color: var(--mist-dim);
            letter-spacing: 0.04em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .hero-stat-item .stat-num {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--gold);
            letter-spacing: 0.02em;
        }

        .hero-stat-divider {
            width: 1px;
            height: 28px;
            background: rgba(242, 240, 233, 0.18);
            flex-shrink: 0;
        }

        @keyframes heroFadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ============ SERVICES ============ */
        .kaiyun-services {
            background: var(--night);
            border-bottom: 1px solid var(--border-faint);
        }

        .service-asym-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 2rem;
            margin-top: 2.5rem;
        }

        .service-feature-large {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            min-height: 420px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 2rem;
            background-image: url('/assets/images/coverpic/cover-1.webp');
            background-size: cover;
            background-position: center;
            transition: transform 0.4s var(--transition-smooth), box-shadow 0.4s var(--transition-smooth);
            box-shadow: var(--shadow-card);
            cursor: pointer;
        }

        .service-feature-large::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 12, 13, 0.85) 0%, rgba(11, 12, 13, 0.3) 55%, rgba(11, 12, 13, 0.1) 100%);
            z-index: 1;
            transition: background 0.4s var(--transition-smooth);
        }

        .service-feature-large:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .service-feature-large:hover::before {
            background: linear-gradient(to top, rgba(11, 12, 13, 0.9) 0%, rgba(11, 12, 13, 0.4) 55%, rgba(11, 12, 13, 0.15) 100%);
        }

        .service-feature-large .service-inner {
            position: relative;
            z-index: 2;
        }

        .service-index {
            font-family: var(--font-display);
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--gold);
            line-height: 1;
            margin-bottom: 0.8rem;
            letter-spacing: -0.02em;
        }

        .service-title-lg {
            font-family: var(--font-serif);
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--cloud);
            margin-bottom: 0.6rem;
        }

        .service-desc {
            font-size: 0.92rem;
            color: var(--mist);
            line-height: 1.7;
            max-width: 500px;
        }

        .service-arrow {
            position: absolute;
            top: 1.5rem;
            right: 1.5rem;
            z-index: 2;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(242, 240, 233, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--cloud);
            transition: all 0.3s var(--transition-smooth);
            background: rgba(11, 12, 13, 0.4);
            backdrop-filter: blur(4px);
        }

        .service-arrow:hover {
            background: var(--gold);
            border-color: var(--gold);
            color: var(--night);
            transform: translateX(6px);
        }

        .service-right-stack {
            display: flex;
            flex-direction: column;
            gap: 1.15rem;
        }

        .service-horizontal-card {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            padding: 1rem 1.2rem;
            transition: all 0.35s var(--transition-smooth);
            cursor: pointer;
        }

        .service-horizontal-card:hover {
            border-color: rgba(196, 154, 75, 0.35);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
        }

        .service-horizontal-card .service-thumb {
            flex-shrink: 0;
            width: 80px;
            height: 60px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            object-fit: cover;
        }

        .service-horizontal-card .service-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-sm);
            transition: transform 0.4s var(--transition-smooth);
        }

        .service-horizontal-card:hover .service-thumb img {
            transform: scale(1.05);
        }

        .service-horizontal-card .service-info {
            flex: 1;
            min-width: 0;
        }

        .service-horizontal-card .service-title-sm {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--cloud);
            margin-bottom: 0.2rem;
        }

        .service-horizontal-card .service-desc-sm {
            font-size: 0.8rem;
            color: var(--mist-dim);
            line-height: 1.5;
        }

        .service-horizontal-card .service-index-sm {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--gold);
            flex-shrink: 0;
            letter-spacing: 0.02em;
        }

        .service-list-numbered {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            padding: 1.2rem 1.5rem;
        }

        .service-list-numbered .service-list-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.55rem 0;
            border-bottom: 1px solid rgba(242, 240, 233, 0.05);
            color: var(--mist);
            font-size: 0.88rem;
        }

        .service-list-numbered .service-list-item:last-child {
            border-bottom: none;
        }

        .service-list-numbered .service-list-num {
            font-family: var(--font-display);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--gold);
            width: 28px;
            flex-shrink: 0;
        }

        /* ============ DATA STRIP ============ */
        .kaiyun-data-strip {
            background: #0A0A0B;
            border-top: 1px solid var(--border-faint);
            border-bottom: 1px solid var(--border-faint);
            padding: 2.5rem 0;
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            align-items: center;
        }

        .data-item {
            text-align: center;
            padding: 1rem 1.5rem;
            position: relative;
        }

        .data-item:not(:last-child)::after {
            content: '';
            position: absolute;
            right: -0.75rem;
            top: 20%;
            width: 1px;
            height: 60%;
            background: rgba(242, 240, 233, 0.12);
        }

        .data-number {
            font-family: var(--font-display);
            font-size: clamp(3rem, 5vw, 4.5rem);
            font-weight: 700;
            color: var(--gold);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 0.4rem;
        }

        .data-unit {
            font-size: 0.85rem;
            color: var(--mist-dim);
            letter-spacing: 0.08em;
            margin-bottom: 0.5rem;
        }

        .data-desc {
            font-size: 0.82rem;
            color: var(--mist-dim);
            line-height: 1.4;
        }

        /* ============ CASE WALL ============ */
        .kaiyun-cases {
            background: var(--night);
            border-bottom: 1px solid var(--border-faint);
        }

        .case-scroll-wrapper {
            display: flex;
            gap: 1.5rem;
            overflow-x: auto;
            scroll-snap-type: x proximity;
            padding: 1.5rem 0.5rem 2rem;
            scrollbar-width: thin;
            scrollbar-color: var(--gold-dim) transparent;
            -webkit-overflow-scrolling: touch;
        }

        .case-scroll-wrapper::-webkit-scrollbar {
            height: 4px;
        }

        .case-scroll-wrapper::-webkit-scrollbar-track {
            background: transparent;
        }

        .case-scroll-wrapper::-webkit-scrollbar-thumb {
            background-color: var(--gold-dim);
            border-radius: var(--radius-pill);
        }

        .case-poster-card {
            flex: 0 0 320px;
            scroll-snap-align: start;
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 3 / 4;
            box-shadow: var(--shadow-card);
            transition: transform 0.4s var(--transition-smooth), box-shadow 0.4s var(--transition-smooth);
            cursor: pointer;
        }

        .case-poster-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-md);
            transition: transform 0.5s var(--transition-smooth);
        }

        .case-poster-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 12, 13, 0.88) 0%, rgba(11, 12, 13, 0.25) 45%, transparent 75%);
            z-index: 1;
            border-radius: var(--radius-md);
            transition: background 0.4s var(--transition-smooth);
        }

        .case-poster-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .case-poster-card:hover img {
            transform: scale(1.04);
        }

        .case-poster-card:hover::before {
            background: linear-gradient(to top, rgba(11, 12, 13, 0.94) 0%, rgba(11, 12, 13, 0.35) 45%, rgba(11, 12, 13, 0.1) 75%);
        }

        .case-poster-info {
            position: absolute;
            left: 1.5rem;
            right: 1.5rem;
            bottom: 1.5rem;
            z-index: 2;
        }

        .case-poster-tag {
            display: inline-block;
            font-size: 0.72rem;
            color: var(--gold);
            border: 1px solid rgba(196, 154, 75, 0.5);
            padding: 0.2rem 0.7rem;
            border-radius: var(--radius-pill);
            margin-bottom: 0.6rem;
            letter-spacing: 0.04em;
        }

        .case-poster-title {
            font-family: var(--font-serif);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--cloud);
            line-height: 1.3;
            transition: color 0.3s var(--transition-smooth);
        }

        .case-poster-card:hover .case-poster-title {
            color: var(--gold);
        }

        /* ============ PROCESS ============ */
        .kaiyun-process {
            background: var(--night-soft);
            border-bottom: 1px solid var(--border-faint);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-top: 2.5rem;
            position: relative;
        }

        .process-grid::before {
            content: '';
            position: absolute;
            top: 25px;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(to right, transparent, var(--gold-dim), var(--gold), var(--gold-dim), transparent);
            opacity: 0.5;
            z-index: 0;
        }

        .process-step {
            position: relative;
            z-index: 1;
            padding-top: 0.5rem;
            transition: transform 0.35s var(--transition-smooth);
        }

        .process-step:hover {
            transform: translateY(-3px);
        }

        .process-step-num {
            font-family: var(--font-display);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--gold);
            letter-spacing: 0.02em;
            margin-bottom: 0.75rem;
            display: block;
        }

        .process-step:hover .process-step-num {
            color: var(--gold-bright);
        }

        .process-step-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--cloud);
            margin-bottom: 0.5rem;
        }

        .process-step-desc {
            font-size: 0.88rem;
            color: var(--mist-dim);
            line-height: 1.65;
            max-width: 220px;
        }

        /* ============ NEWS ============ */
        .kaiyun-news {
            background: var(--night);
            border-bottom: 1px solid var(--border-faint);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 3fr 2fr;
            gap: 2.5rem;
            margin-top: 2rem;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 1.2rem;
            padding: 1.3rem 0;
            border-bottom: 1px solid var(--border-faint);
            transition: all 0.3s var(--transition-smooth);
            cursor: pointer;
        }

        .news-item:first-child {
            padding-top: 0;
        }

        .news-item:hover {
            padding-left: 0.5rem;
        }

        .news-item .news-date {
            flex-shrink: 0;
            font-size: 0.78rem;
            color: var(--gold);
            letter-spacing: 0.05em;
            font-weight: 500;
            padding-top: 0.2rem;
            min-width: 80px;
        }

        .news-item .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-item .news-title {
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--cloud);
            margin-bottom: 0.3rem;
            line-height: 1.5;
            transition: color 0.3s var(--transition-smooth);
        }

        .news-item:hover .news-title {
            color: var(--gold);
        }

        .news-item .news-summary {
            font-size: 0.88rem;
            color: var(--mist-dim);
            line-height: 1.65;
        }

        .news-recommend {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            height: fit-content;
            position: sticky;
            top: calc(var(--nav-height) + 1rem);
        }

        .news-recommend .recommend-title {
            font-family: var(--font-serif);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--cloud);
            margin-bottom: 1.2rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px solid var(--border-faint);
        }

        .recommend-rank-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.7rem 0;
            border-bottom: 1px solid rgba(242, 240, 233, 0.04);
            cursor: pointer;
            transition: all 0.3s var(--transition-smooth);
        }

        .recommend-rank-item:hover {
            padding-left: 0.4rem;
        }

        .recommend-rank-num {
            font-family: var(--font-display);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--gold);
            width: 32px;
            flex-shrink: 0;
        }

        .recommend-rank-text {
            font-size: 0.88rem;
            color: var(--mist);
            line-height: 1.5;
        }

        .recommend-rank-tag {
            font-size: 0.7rem;
            padding: 0.15rem 0.5rem;
            border-radius: var(--radius-pill);
            background: rgba(196, 154, 75, 0.12);
            color: var(--gold);
            flex-shrink: 0;
            letter-spacing: 0.03em;
        }

        /* ============ REVIEWS ============ */
        .kaiyun-reviews {
            background: var(--night-soft);
            border-bottom: 1px solid var(--border-faint);
        }

        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin-top: 2.5rem;
        }

        .review-card {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: all 0.35s var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .review-card:hover {
            border-color: rgba(196, 154, 75, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
        }

        .review-rating {
            color: var(--gold);
            font-size: 0.85rem;
            letter-spacing: 0.1em;
        }

        .review-text {
            font-size: 0.9rem;
            color: var(--mist);
            line-height: 1.7;
            flex: 1;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding-top: 0.8rem;
            border-top: 1px solid var(--border-faint);
        }

        .review-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--gold-dim), var(--gold));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--night);
            font-weight: 700;
            font-size: 0.75rem;
            flex-shrink: 0;
        }

        .review-author-name {
            font-size: 0.82rem;
            color: var(--cloud);
            font-weight: 500;
        }

        .review-author-role {
            font-size: 0.72rem;
            color: var(--mist-dim);
        }

        /* ============ PARTNERS ============ */
        .kaiyun-partners {
            background: var(--night);
            border-bottom: 1px solid var(--border-faint);
        }

        .partner-tag-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 2.5rem;
        }

        .partner-tag-card {
            flex: 0 1 calc(25% - 0.75rem);
            min-width: 220px;
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            padding: 1.2rem;
            transition: all 0.35s var(--transition-smooth);
            cursor: pointer;
        }

        .partner-tag-card:hover {
            border-color: rgba(196, 154, 75, 0.4);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
        }

        .partner-tag-name {
            font-size: 1rem;
            font-weight: 600;
            color: var(--cloud);
            margin-bottom: 0.3rem;
        }

        .partner-tag-desc {
            font-size: 0.82rem;
            color: var(--mist-dim);
            line-height: 1.55;
        }

        /* ============ BRAND INTRO ============ */
        .kaiyun-brand-intro {
            background: var(--night-soft);
            border-bottom: 1px solid var(--border-faint);
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }

        .brand-intro-text {
            font-size: 1.05rem;
            color: var(--mist);
            line-height: 1.9;
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }

        .brand-intro-text strong {
            color: var(--gold);
            font-weight: 600;
        }

        /* ============ FAQ ============ */
        .kaiyun-faq {
            background: var(--night);
            border-bottom: 1px solid var(--border-faint);
        }

        .faq-accordion .accordion-item {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            margin-bottom: 0.8rem;
            overflow: hidden;
            transition: all 0.3s var(--transition-smooth);
        }

        .faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-left: 3px solid var(--gold);
        }

        .faq-accordion .accordion-button {
            background: var(--night-card);
            color: var(--cloud);
            font-size: 1rem;
            font-weight: 500;
            padding: 1.2rem 1.5rem;
            border: none;
            box-shadow: none;
            letter-spacing: 0.02em;
            transition: all 0.3s var(--transition-smooth);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: #1D2023;
            color: var(--gold);
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            outline: none;
            border: none;
            box-shadow: none;
        }

        .faq-accordion .accordion-button::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            background-image: none;
            color: var(--mist-dim);
            font-size: 0.8rem;
            transition: transform 0.3s var(--transition-smooth);
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--gold);
        }

        .faq-accordion .accordion-body {
            background: var(--night-card);
            color: var(--mist);
            font-size: 0.95rem;
            line-height: 1.8;
            padding: 0.8rem 1.5rem 1.3rem;
            border-top: 1px solid rgba(242, 240, 233, 0.05);
        }

        /* ============ CTA / CONTACT ============ */
        .kaiyun-contact {
            background: var(--night-soft);
            border-bottom: 1px solid var(--border-faint);
        }

        .contact-wrapper {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            box-shadow: var(--shadow-card);
        }

        .contact-info h3 {
            font-family: var(--font-serif);
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--cloud);
            margin-bottom: 1rem;
        }

        .contact-info p {
            font-size: 0.95rem;
            color: var(--mist-dim);
            line-height: 1.7;
        }

        .contact-form .form-control {
            background: rgba(242, 240, 233, 0.05);
            border: 1px solid rgba(242, 240, 233, 0.18);
            border-radius: var(--radius-sm);
            height: 48px;
            color: var(--cloud);
            font-size: 0.95rem;
            transition: all 0.3s var(--transition-smooth);
        }

        .contact-form .form-control:focus {
            background: rgba(242, 240, 233, 0.07);
            border-color: var(--gold);
            box-shadow: 0 0 0 3px rgba(196, 154, 75, 0.12);
            outline: none;
        }

        .contact-form .form-control::placeholder {
            color: rgba(242, 240, 233, 0.35);
        }

        .contact-form .form-label {
            font-size: 0.82rem;
            color: var(--mist);
            letter-spacing: 0.04em;
            margin-bottom: 0.4rem;
        }

        .btn-contact-submit {
            padding: 0.75rem 1.8rem;
            background-color: var(--gold);
            color: var(--night);
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            border: none;
            transition: all 0.3s var(--transition-smooth);
            letter-spacing: 0.03em;
        }

        .btn-contact-submit:hover {
            background-color: var(--gold-bright);
            color: var(--night);
            transform: translateY(-1px);
            box-shadow: var(--shadow-btn);
        }

        /* ============ FOOTER ============ */
        .kaiyun-footer {
            background: #080809;
            border-top: 1px solid rgba(242, 240, 233, 0.06);
            padding: 3.5rem 0 1.5rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 3fr 2fr 2fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }

        .footer-brand .footer-logo {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: 1.5rem;
            color: var(--cloud);
            margin-bottom: 0.8rem;
        }

        .footer-brand .footer-logo span {
            color: var(--gold);
        }

        .footer-brand .footer-desc {
            font-size: 0.85rem;
            color: var(--mist-dim);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-links-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--cloud);
            letter-spacing: 0.05em;
            margin-bottom: 1rem;
        }

        .footer-links-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .footer-links-list a {
            font-size: 0.85rem;
            color: var(--mist-dim);
            transition: color 0.3s var(--transition-smooth);
        }

        .footer-links-list a:hover {
            color: var(--gold);
        }

        .footer-contact-info {
            font-size: 0.85rem;
            color: var(--mist-dim);
            line-height: 1.8;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(242, 240, 233, 0.06);
            font-size: 0.78rem;
            color: var(--mist-dim);
        }

        .footer-bottom a {
            color: var(--mist-dim);
            transition: color 0.3s var(--transition-smooth);
        }

        .footer-bottom a:hover {
            color: var(--gold);
        }

        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem 1.5rem;
            align-items: center;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1199.98px) {
            .service-asym-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }

            .service-feature-large {
                min-height: 320px;
            }

            .partner-tag-card {
                flex: 0 1 calc(33.33% - 0.75rem);
            }

            .review-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 991.98px) {
            .section-pad {
                padding-top: 3.5rem;
                padding-bottom: 3.5rem;
            }

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }

            .data-item:not(:last-child)::after {
                display: none;
            }

            .data-item {
                padding: 0.8rem;
                border: 1px solid var(--border-faint);
                border-radius: var(--radius-md);
            }

            .news-layout {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .news-recommend {
                position: static;
                height: auto;
            }

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }

            .process-grid::before {
                display: none;
            }

            .contact-wrapper {
                grid-template-columns: 1fr;
                gap: 1.5rem;
                padding: 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
        }

        @media (max-width: 767.98px) {
            .section-pad {
                padding-top: 56px;
                padding-bottom: 56px;
            }

            .kaiyun-hero {
                min-height: 78vh;
                border-top: 6px solid #000;
                border-bottom: 8px solid #000;
            }

            .hero-title {
                font-size: 2.5rem;
            }

            .hero-title .gold-accent {
                font-size: 1.8rem;
            }

            .hero-stat-divider {
                display: none;
            }

            .hero-stats-divider {
                flex-wrap: wrap;
                gap: 0.8rem;
            }

            .case-poster-card {
                flex: 0 0 75vw;
                aspect-ratio: 3 / 4;
            }

            .review-grid {
                grid-template-columns: 1fr;
            }

            .partner-tag-card {
                flex: 1 1 100%;
                min-width: 100%;
            }

            .process-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .news-item {
                flex-direction: column;
                gap: 0.5rem;
            }

            .news-item .news-date {
                min-width: auto;
            }

            .service-horizontal-card {
                flex-wrap: wrap;
            }

            .service-horizontal-card .service-thumb {
                width: 100%;
                height: 120px;
            }

            .service-horizontal-card .service-thumb img {
                width: 100%;
                height: 100%;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .hero-title {
                font-size: 2.2rem;
                letter-spacing: -0.01em;
            }

            .hero-title .gold-accent {
                font-size: 1.5rem;
            }

            .hero-cta-group {
                flex-direction: column;
                gap: 0.8rem;
            }

            .btn-hero-primary,
            .btn-hero-secondary {
                width: 100%;
                justify-content: center;
            }

            .hero-invite-panel {
                padding: 1.2rem;
            }

            .data-grid {
                grid-template-columns: 1fr;
                gap: 0.8rem;
            }

            .data-number {
                font-size: 2.5rem;
            }

            .navbar-brand-logo {
                font-size: 1.2rem;
            }
        }

        /* ============ ANIMATION UTILITIES ============ */
        .fade-up-on-load {
            animation: heroFadeUp 0.7s var(--transition-smooth) both;
        }

        .fade-up-delay-1 {
            animation-delay: 0.1s;
        }
        .fade-up-delay-2 {
            animation-delay: 0.2s;
        }
        .fade-up-delay-3 {
            animation-delay: 0.3s;
        }
        .fade-up-delay-4 {
            animation-delay: 0.4s;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category2 */
:root {
            --night: #0B0C0D;
            --night-soft: #121315;
            --night-card: #181A1C;
            --cloud: #F2F0E9;
            --mist: #C8CDD0;
            --mist-dim: #8F989E;
            --gold: #C49A4B;
            --gold-bright: #D9AC5F;
            --gold-dim: #8F6F37;
            --amber: #B8822F;
            --red-dark: #8C2F2A;
            --orange-dark: #B65F2B;
            --border-faint: rgba(242, 240, 233, 0.08);
            --border-light: rgba(242, 240, 233, 0.15);
            --border-mist: rgba(200, 205, 208, 0.28);
            --radius-sm: 2px;
            --radius-md: 4px;
            --radius-lg: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 0 0 1px rgba(196, 154, 75, 0.25), 0 24px 48px rgba(0, 0, 0, 0.45);
            --shadow-btn: 0 8px 24px rgba(196, 154, 75, 0.18);
            --font-serif: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', serif;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', '思源黑体', system-ui, sans-serif;
            --font-display: 'Oswald', 'Bebas Neue', 'Noto Sans SC', sans-serif;
            --transition-smooth: cubic-bezier(0.22, 0.61, 0.36, 1);
            --gutter-x: 2rem;
            --gutter-y: 3rem;
            --nav-height: 72px;
            --section-pad-desktop: 96px;
            --section-pad-mobile: 56px;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--mist);
            background-color: var(--night);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s var(--transition-smooth), border-color 0.3s var(--transition-smooth), background-color 0.3s var(--transition-smooth);
        }
        a:hover {
            color: var(--gold);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button:focus, a:focus, input:focus, textarea:focus, select:focus {
            outline: 2px solid var(--gold);
            outline-offset: 3px;
        }

        .container {
            max-width: 1320px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .section-pad {
            padding-top: var(--section-pad-desktop);
            padding-bottom: var(--section-pad-desktop);
        }

        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--gold);
            border: 1px solid rgba(196, 154, 75, 0.4);
            padding: 0.35rem 0.9rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1.25rem;
            font-weight: 500;
        }

        .section-title {
            font-family: var(--font-serif);
            font-weight: 800;
            font-size: clamp(2rem, 4.5vw, 3.5rem);
            line-height: 1.08;
            color: var(--cloud);
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }

        .section-subtitle {
            font-size: 1.05rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.7;
            max-width: 720px;
            margin-bottom: 2.5rem;
        }

        /* ============ NAVBAR ============ */
        .kaiyun-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            height: var(--nav-height);
            background: rgba(10, 11, 13, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: border-color 0.4s var(--transition-smooth), background-color 0.4s var(--transition-smooth);
        }
        .kaiyun-navbar.scrolled {
            border-bottom-color: rgba(242, 240, 233, 0.08);
            background: rgba(10, 11, 13, 0.92);
        }
        .navbar-brand-logo {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.01em;
            color: var(--cloud);
            white-space: nowrap;
        }
        .navbar-brand-logo span {
            color: var(--gold);
        }
        .navbar-brand-logo:hover {
            color: var(--cloud);
        }
        .navbar .nav-link {
            font-family: var(--font-sans);
            font-size: 0.9rem;
            font-weight: 400;
            letter-spacing: 0.05em;
            color: var(--mist);
            padding: 0.5rem 0.9rem;
            position: relative;
            transition: color 0.3s var(--transition-smooth);
            white-space: nowrap;
        }
        .navbar .nav-link::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 1px;
            background-color: var(--gold);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.35s var(--transition-smooth);
        }
        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: var(--gold-bright);
        }
        .navbar .nav-link:hover::after,
        .navbar .nav-link.active::after {
            transform: scaleX(1);
        }
        .navbar-toggler {
            border: none;
            padding: 0.25rem;
            box-shadow: none;
        }
        .navbar-toggler-icon {
            background-image: none;
            position: relative;
            width: 28px;
            height: 2px;
            background-color: var(--cloud);
            display: inline-block;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler-icon::before,
        .navbar-toggler-icon::after {
            content: '';
            position: absolute;
            left: 0;
            width: 28px;
            height: 2px;
            background-color: var(--cloud);
            border-radius: var(--radius-sm);
            transition: transform 0.3s var(--transition-smooth);
        }
        .navbar-toggler-icon::before {
            top: -8px;
        }
        .navbar-toggler-icon::after {
            top: 8px;
        }
        .lang-switch-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            height: 32px;
            padding: 0 0.8rem;
            border-radius: 999px;
            border: 1px solid rgba(242, 240, 233, 0.25);
            font-size: 0.8rem;
            color: var(--mist);
            background: transparent;
            transition: all 0.3s var(--transition-smooth);
            white-space: nowrap;
        }
        .lang-switch-pill:hover {
            border-color: var(--gold);
            color: var(--gold);
        }
        .lang-switch-pill .lang-active {
            color: var(--night);
            background-color: var(--gold);
            border-radius: 50%;
            width: 20px;
            height: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 600;
        }
        .btn-kaiyun-nav {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.55rem 1.4rem;
            background-color: var(--gold);
            color: var(--night);
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.05em;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: all 0.3s var(--transition-smooth);
            box-shadow: var(--shadow-btn);
        }
        .btn-kaiyun-nav:hover {
            background-color: var(--gold-bright);
            color: var(--night);
            transform: translateY(-1px);
            box-shadow: 0 12px 32px rgba(196, 154, 75, 0.28);
        }
        .mobile-lang-wrapper {
            border-top: 1px solid var(--border-faint);
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                position: fixed;
                top: var(--nav-height);
                right: 0;
                width: min(320px, 85vw);
                height: calc(100vh - var(--nav-height));
                background: rgba(10, 11, 13, 0.98);
                padding: 2rem 1.5rem;
                z-index: 1029;
                transform: translateX(100%);
                transition: transform 0.4s var(--transition-smooth);
                border-left: 1px solid var(--border-faint);
                overflow-y: auto;
            }
            .navbar-collapse.show {
                transform: translateX(0);
            }
            .navbar-collapse .navbar-nav {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.25rem;
            }
            .navbar-collapse .nav-link {
                font-size: 1.1rem;
                padding: 0.8rem 0;
                width: 100%;
            }
            .navbar-collapse .d-flex.gap-2 {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.75rem;
                margin-top: 1.5rem;
            }
        }

        /* ============ PAGE BANNER ============ */
        .page-banner {
            min-height: 44vh;
            background-image: linear-gradient(rgba(10,11,13,0.55), rgba(10,11,13,0.82)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            display: flex;
            align-items: flex-end;
            position: relative;
            border-bottom: 1px solid var(--border-faint);
            padding: 5rem 0 3rem;
        }
        .breadcrumb-kaiyun {
            font-size: 0.82rem;
            color: var(--mist-dim);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 1rem;
            letter-spacing: 0.05em;
        }
        .breadcrumb-kaiyun a {
            color: var(--mist-dim);
            transition: color 0.3s;
        }
        .breadcrumb-kaiyun a:hover {
            color: var(--gold);
        }
        .breadcrumb-kaiyun .sep {
            color: var(--gold);
            font-size: 0.7rem;
        }
        .page-banner h1 {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: clamp(2rem, 5vw, 3.75rem);
            line-height: 1.05;
            color: var(--cloud);
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            text-wrap: balance;
        }
        .page-banner .banner-desc {
            font-size: 1rem;
            font-weight: 300;
            color: var(--mist);
            line-height: 1.7;
            max-width: 640px;
        }

        /* ============ ASYMMETRIC GRID ============ */
        .kaiyun-card {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.45s var(--transition-smooth);
            box-shadow: var(--shadow-card);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .kaiyun-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(196, 154, 75, 0.2);
        }
        .kaiyun-card .card-img-wrap {
            overflow: hidden;
            position: relative;
            aspect-ratio: 16 / 10;
            flex-shrink: 0;
        }
        .kaiyun-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.6s var(--transition-smooth);
        }
        .kaiyun-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .kaiyun-card .card-img-wrap .tag-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: rgba(10,11,13,0.72);
            color: var(--gold-bright);
            font-size: 0.72rem;
            letter-spacing: 0.1em;
            padding: 0.3rem 0.8rem;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(196, 154, 75, 0.35);
            backdrop-filter: blur(4px);
        }
        .kaiyun-card .card-body-wrap {
            padding: 1.25rem 1.5rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .kaiyun-card .card-title {
            font-family: var(--font-serif);
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--cloud);
            line-height: 1.3;
            margin-bottom: 0.6rem;
            transition: color 0.3s;
        }
        .kaiyun-card:hover .card-title {
            color: var(--gold-bright);
        }
        .kaiyun-card .card-desc {
            font-size: 0.95rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 0.8rem;
        }
        .kaiyun-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--mist-dim);
            border-top: 1px solid var(--border-faint);
            padding-top: 0.8rem;
        }
        .kaiyun-card .card-meta .arrow {
            color: var(--gold);
            transition: transform 0.35s var(--transition-smooth);
        }
        .kaiyun-card:hover .card-meta .arrow {
            transform: translateX(6px);
        }

        /* Small horizontal card */
        .kaiyun-h-card {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.45s var(--transition-smooth);
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: stretch;
            height: 100%;
            min-height: 130px;
        }
        .kaiyun-h-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(196, 154, 75, 0.2);
        }
        .kaiyun-h-card .h-img {
            width: 130px;
            min-width: 130px;
            aspect-ratio: 4 / 3;
            overflow: hidden;
            flex-shrink: 0;
        }
        .kaiyun-h-card .h-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.6s var(--transition-smooth);
        }
        .kaiyun-h-card:hover .h-img img {
            transform: scale(1.05);
        }
        .kaiyun-h-card .h-body {
            padding: 1rem 1.2rem;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .kaiyun-h-card .h-tag {
            font-size: 0.7rem;
            letter-spacing: 0.1em;
            color: var(--gold);
            text-transform: uppercase;
            margin-bottom: 0.3rem;
        }
        .kaiyun-h-card .h-title {
            font-family: var(--font-serif);
            font-weight: 700;
            font-size: 1.02rem;
            color: var(--cloud);
            line-height: 1.3;
            margin-bottom: 0.4rem;
            transition: color 0.3s;
        }
        .kaiyun-h-card:hover .h-title {
            color: var(--gold-bright);
        }
        .kaiyun-h-card .h-desc {
            font-size: 0.88rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.55;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.3rem;
        }
        .kaiyun-h-card .h-date {
            font-size: 0.75rem;
            color: var(--mist-dim);
        }

        /* ==== EXTRA CARDS GRID ==== */
        .extra-card-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        @media (max-width: 1199.98px) {
            .extra-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 575.98px) {
            .extra-card-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============ METRIC STRIP ============ */
        .metric-strip {
            background: linear-gradient(180deg, var(--night-soft) 0%, var(--night) 100%);
            border-top: 1px solid var(--border-faint);
            border-bottom: 1px solid var(--border-faint);
        }
        .metric-item {
            text-align: center;
            padding: 2rem 1rem;
            border-right: 1px solid var(--border-faint);
            transition: background-color 0.3s;
        }
        .metric-item:last-child {
            border-right: none;
        }
        .metric-item:hover {
            background-color: rgba(196, 154, 75, 0.04);
        }
        .metric-num {
            font-family: var(--font-display);
            font-weight: 600;
            font-size: clamp(2.5rem, 4vw, 3.5rem);
            color: var(--gold);
            letter-spacing: 0.02em;
            line-height: 1.1;
            margin-bottom: 0.4rem;
        }
        .metric-unit {
            font-size: 0.85rem;
            color: var(--mist-dim);
            margin-bottom: 0.4rem;
            letter-spacing: 0.08em;
        }
        .metric-label {
            font-size: 0.9rem;
            color: var(--mist);
            font-weight: 400;
        }
        @media (max-width: 767.98px) {
            .metric-item {
                border-right: none;
                border-bottom: 1px solid var(--border-faint);
                padding: 1.5rem 1rem;
            }
            .metric-item:last-child {
                border-bottom: none;
            }
        }

        /* ============ FAQ ============ */
        .accordion-kaiyun .accordion-item {
            background: var(--night-card);
            border: none;
            border-bottom: 1px solid var(--border-faint);
            border-radius: 0;
            margin-bottom: 0;
        }
        .accordion-kaiyun .accordion-item:first-child {
            border-top: 1px solid var(--border-faint);
        }
        .accordion-kaiyun .accordion-header {
            margin: 0;
        }
        .accordion-kaiyun .accordion-button {
            background: transparent;
            color: var(--cloud);
            font-family: var(--font-serif);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 1.3rem 1.2rem 1.3rem 1.5rem;
            border: none;
            box-shadow: none;
            border-radius: 0;
            position: relative;
            letter-spacing: 0.01em;
            transition: all 0.3s var(--transition-smooth);
        }
        .accordion-kaiyun .accordion-button::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background-color: var(--gold);
            transform: scaleY(0);
            transform-origin: top;
            transition: transform 0.35s var(--transition-smooth);
        }
        .accordion-kaiyun .accordion-button:not(.collapsed)::before {
            transform: scaleY(1);
        }
        .accordion-kaiyun .accordion-button::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            background-image: none;
            color: var(--gold);
            font-size: 1.1rem;
            transition: transform 0.35s var(--transition-smooth);
            flex-shrink: 0;
        }
        .accordion-kaiyun .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--gold-bright);
        }
        .accordion-kaiyun .accordion-button:hover {
            color: var(--gold-bright);
            background-color: rgba(196, 154, 75, 0.04);
        }
        .accordion-kaiyun .accordion-button:not(.collapsed) {
            background-color: rgba(196, 154, 75, 0.05);
            color: var(--gold-bright);
            box-shadow: none;
        }
        .accordion-kaiyun .accordion-body {
            background: rgba(10, 11, 13, 0.35);
            color: var(--mist);
            font-size: 0.95rem;
            line-height: 1.8;
            padding: 1.2rem 1.5rem 1.5rem 1.5rem;
            border-left: 3px solid var(--gold);
            margin-left: 1.5rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
        }

        /* ============ CTA ============ */
        .cta-kaiyun {
            background-image: linear-gradient(rgba(10,11,13,0.72), rgba(10,11,13,0.88)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            border-top: 1px solid var(--border-faint);
            position: relative;
        }
        .cta-kaiyun .form-control {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--radius-sm);
            color: var(--cloud);
            height: 48px;
            padding: 0.75rem 1.2rem;
            font-size: 0.95rem;
            transition: all 0.3s var(--transition-smooth);
        }
        .cta-kaiyun .form-control::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .cta-kaiyun .form-control:focus {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--gold);
            box-shadow: 0 0 0 3px rgba(196, 154, 75, 0.15);
            color: var(--cloud);
            outline: none;
        }
        .cta-kaiyun .form-label {
            font-size: 0.85rem;
            color: var(--mist-dim);
            letter-spacing: 0.05em;
            margin-bottom: 0.4rem;
        }
        .btn-kaiyun-gold {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 2rem;
            background-color: var(--gold);
            color: var(--night);
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.05em;
            border-radius: var(--radius-sm);
            border: none;
            transition: all 0.3s var(--transition-smooth);
            box-shadow: var(--shadow-btn);
            cursor: pointer;
        }
        .btn-kaiyun-gold:hover {
            background-color: var(--gold-bright);
            color: var(--night);
            transform: translateY(-1px);
            box-shadow: 0 12px 32px rgba(196, 154, 75, 0.28);
        }

        /* ============ FOOTER ============ */
        .kaiyun-footer {
            background: #08090A;
            border-top: 1px solid var(--border-faint);
            padding-top: 4rem;
            padding-bottom: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 3rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: 1.5rem;
            color: var(--cloud);
            letter-spacing: -0.01em;
            margin-bottom: 1rem;
            display: inline-block;
        }
        .footer-brand-desc {
            font-size: 0.9rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-nav-title {
            font-size: 0.8rem;
            letter-spacing: 0.15em;
            text-transform: uppercase;
            color: var(--gold);
            font-weight: 600;
            margin-bottom: 1.2rem;
        }
        .footer-nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-nav ul li {
            margin-bottom: 0.7rem;
        }
        .footer-nav ul li a {
            font-size: 0.9rem;
            color: var(--mist);
            transition: color 0.3s;
            position: relative;
        }
        .footer-nav ul li a:hover {
            color: var(--gold);
        }
        .footer-contact-item {
            font-size: 0.85rem;
            color: var(--mist-dim);
            margin-bottom: 0.6rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .footer-contact-item i {
            color: var(--gold);
            font-size: 0.8rem;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-faint);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            font-size: 0.78rem;
            color: var(--mist-dim);
        }
        .footer-bottom a {
            color: var(--mist-dim);
            transition: color 0.3s;
        }
        .footer-bottom a:hover {
            color: var(--gold);
        }
        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }
        @media (max-width: 575.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.4rem;
            }
        }

        /* ============ ANIMATIONS ============ */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s var(--transition-smooth), transform 0.6s var(--transition-smooth);
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .fade-up[data-delay="1"] { transition-delay: 0.08s; }
        .fade-up[data-delay="2"] { transition-delay: 0.16s; }
        .fade-up[data-delay="3"] { transition-delay: 0.24s; }
        .fade-up[data-delay="4"] { transition-delay: 0.32s; }

        @media (prefers-reduced-motion: reduce) {
            html { scroll-behavior: auto; }
            .fade-up { opacity: 1; transform: none; transition: none; }
            .kaiyun-card, .kaiyun-h-card, .btn-kaiyun-gold, .btn-kaiyun-nav { transition: none; }
            .kaiyun-card:hover, .kaiyun-h-card:hover { transform: none; }
        }

        /* Responsive tweaks for asymmetric grid */
        @media (max-width: 767.98px) {
            .kaiyun-h-card {
                flex-direction: column;
                min-height: auto;
            }
            .kaiyun-h-card .h-img {
                width: 100%;
                min-width: 100%;
                aspect-ratio: 16 / 9;
            }
            .kaiyun-h-card .h-body {
                padding: 1rem 1.2rem;
            }
            .page-banner {
                min-height: 36vh;
                padding: 3.5rem 0 2.5rem;
            }
        }
        @media (max-width: 575.98px) {
            :root {
                --section-pad-desktop: 56px;
            }
            .kaiyun-navbar {
                height: 60px;
            }
            :root {
                --nav-height: 60px;
            }
            .page-banner h1 {
                font-size: 1.75rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }

/* roulang page: category1 */
:root {
            --night: #0B0C0D;
            --night-soft: #121315;
            --night-card: #181A1C;
            --cloud: #F2F0E9;
            --mist: #C8CDD0;
            --mist-dim: #8F989E;
            --gold: #C49A4B;
            --gold-bright: #D9AC5F;
            --gold-dim: #8F6F37;
            --amber: #B8822F;
            --red-dark: #8C2F2A;
            --orange-dark: #B65F2B;
            --border-faint: rgba(242, 240, 233, 0.08);
            --border-light: rgba(242, 240, 233, 0.15);
            --border-mist: rgba(200, 205, 208, 0.28);
            --radius-sm: 2px;
            --radius-md: 4px;
            --radius-lg: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 0 0 1px rgba(196, 154, 75, 0.25), 0 24px 48px rgba(0, 0, 0, 0.45);
            --shadow-btn: 0 8px 24px rgba(196, 154, 75, 0.18);
            --font-serif: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', serif;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', '思源黑体', system-ui, sans-serif;
            --font-display: 'Oswald', 'Bebas Neue', 'Noto Sans SC', sans-serif;
            --transition-smooth: cubic-bezier(0.22, 0.61, 0.36, 1);
            --gutter-x: 2rem;
            --gutter-y: 3rem;
            --nav-height: 72px;
            --section-pad-desktop: 96px;
            --section-pad-mobile: 56px;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--mist);
            background-color: var(--night);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s var(--transition-smooth), border-color 0.3s var(--transition-smooth), background-color 0.3s var(--transition-smooth);
        }
        a:hover {
            color: var(--gold);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button:focus,
        a:focus,
        input:focus,
        textarea:focus,
        select:focus {
            outline: 2px solid var(--gold);
            outline-offset: 3px;
        }
        .container {
            max-width: 1320px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        .section-pad {
            padding-top: var(--section-pad-desktop);
            padding-bottom: var(--section-pad-desktop);
        }
        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--gold);
            border: 1px solid rgba(196, 154, 75, 0.4);
            padding: 0.35rem 0.9rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1.25rem;
            font-weight: 500;
        }
        .section-title {
            font-family: var(--font-serif);
            font-weight: 800;
            font-size: clamp(2rem, 4.5vw, 3.5rem);
            line-height: 1.08;
            color: var(--cloud);
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }
        .section-subtitle {
            font-size: 1.05rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.7;
            max-width: 720px;
            margin-bottom: 2.5rem;
        }
        /* ============ NAVBAR ============ */
        .kaiyun-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            height: var(--nav-height);
            background: rgba(10, 11, 13, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: border-color 0.4s var(--transition-smooth), background-color 0.4s var(--transition-smooth);
        }
        .kaiyun-navbar.scrolled {
            border-bottom-color: rgba(242, 240, 233, 0.08);
            background: rgba(10, 11, 13, 0.92);
        }
        .navbar-brand-logo {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.01em;
            color: var(--cloud);
            white-space: nowrap;
        }
        .navbar-brand-logo span {
            color: var(--gold);
        }
        .navbar-brand-logo:hover {
            color: var(--cloud);
        }
        .navbar .nav-link {
            font-family: var(--font-sans);
            font-size: 0.9rem;
            font-weight: 400;
            letter-spacing: 0.05em;
            color: var(--mist);
            padding: 0.5rem 0.9rem;
            position: relative;
            transition: color 0.3s var(--transition-smooth);
            white-space: nowrap;
        }
        .navbar .nav-link::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 1px;
            background-color: var(--gold);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.35s var(--transition-smooth);
        }
        .navbar .nav-link:hover::after,
        .navbar .nav-link.active::after {
            transform: scaleX(1);
        }
        .navbar .nav-link.active {
            color: var(--gold);
        }
        .navbar .nav-link:hover {
            color: var(--gold);
        }
        .lang-switch-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            height: 32px;
            padding: 0 1rem;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-mist);
            font-size: 0.82rem;
            font-weight: 400;
            color: var(--mist);
            background: transparent;
            transition: all 0.3s var(--transition-smooth);
            white-space: nowrap;
        }
        .lang-switch-pill .lang-active {
            color: var(--gold);
            font-weight: 600;
        }
        .lang-switch-pill:hover {
            border-color: var(--gold);
            color: var(--cloud);
            background: rgba(196, 154, 75, 0.06);
        }
        .btn-kaiyun-nav {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 38px;
            padding: 0 1.4rem;
            border-radius: var(--radius-sm);
            background: var(--gold);
            color: var(--night);
            font-size: 0.88rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            transition: all 0.35s var(--transition-smooth);
            white-space: nowrap;
            border: 1px solid var(--gold);
        }
        .btn-kaiyun-nav:hover {
            background: var(--gold-bright);
            color: var(--night);
            transform: translateY(-1px);
            box-shadow: var(--shadow-btn);
        }
        .navbar-toggler {
            border: 1px solid var(--border-mist);
            border-radius: var(--radius-sm);
            padding: 0.4rem 0.6rem;
            background: transparent;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28C8%2C205%2C208%2C0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .navbar-toggler:focus {
            outline: 2px solid var(--gold);
            outline-offset: 2px;
            box-shadow: none;
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--night);
                z-index: 1029;
                padding: 1.5rem;
                overflow-y: auto;
                border-top: 1px solid var(--border-faint);
                transform: translateX(100%);
                transition: transform 0.35s var(--transition-smooth);
            }
            .navbar-collapse.collapsing {
                transform: translateX(100%);
                transition: transform 0.35s var(--transition-smooth);
            }
            .navbar-collapse.show {
                transform: translateX(0);
            }
            .navbar-collapse .navbar-nav {
                text-align: left;
                padding-top: 1rem;
            }
            .navbar-collapse .nav-link {
                font-size: 1.1rem;
                padding: 0.75rem 0;
                border-bottom: 1px solid var(--border-faint);
            }
            .navbar-collapse .nav-link::after {
                left: 0;
                right: 0;
                bottom: 0.5rem;
            }
            .navbar-collapse .d-flex.align-items-center.gap-2 {
                flex-direction: column;
                align-items: flex-start !important;
                gap: 0.75rem !important;
                padding-top: 1.25rem;
            }
            .mobile-lang-wrapper {
                display: block !important;
            }
            .navbar-collapse .d-flex.align-items-center.gap-2 .lang-switch-pill,
            .navbar-collapse .d-flex.align-items-center.gap-2 .btn-kaiyun-nav {
                display: none;
            }
            .mobile-lang-wrapper .lang-switch-pill {
                width: 100%;
                justify-content: center;
            }
        }
        @media (min-width: 992px) {
            .mobile-lang-wrapper {
                display: none !important;
            }
            .navbar-collapse {
                transform: none !important;
                position: static !important;
                background: transparent !important;
                border: none !important;
                padding: 0 !important;
                overflow: visible !important;
                transition: none !important;
            }
        }
        /* ============ CATEGORY BANNER ============ */
        .category-banner {
            position: relative;
            min-height: 44vh;
            display: flex;
            align-items: flex-end;
            background-image: linear-gradient(to bottom, rgba(11, 12, 13, 0.35), rgba(11, 12, 13, 0.9)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 35%;
            padding: 6rem 0 3rem;
            border-bottom: 1px solid var(--border-faint);
        }
        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center top, transparent 45%, rgba(11, 12, 13, 0.4) 100%);
            pointer-events: none;
        }
        .category-banner .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-kaiyun {
            font-size: 0.82rem;
            color: var(--mist-dim);
            letter-spacing: 0.05em;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .breadcrumb-kaiyun a {
            color: var(--mist);
            transition: color 0.3s;
        }
        .breadcrumb-kaiyun a:hover {
            color: var(--gold);
        }
        .breadcrumb-kaiyun .sep {
            color: var(--gold-dim);
        }
        .breadcrumb-kaiyun .current {
            color: var(--gold);
            font-weight: 500;
        }
        .category-banner h1 {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            color: var(--cloud);
            letter-spacing: -0.02em;
            margin-bottom: 0.5rem;
            line-height: 1.1;
        }
        .category-banner .banner-desc {
            font-size: 1rem;
            font-weight: 300;
            color: var(--mist);
            max-width: 500px;
            line-height: 1.6;
        }
        /* ============ WHITE PAPER HERO ============ */
        .whitepaper-hero {
            background: var(--night-soft);
            border-bottom: 1px solid var(--border-faint);
        }
        .whitepaper-hero .wp-cover {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 3 / 4;
        }
        .whitepaper-hero .wp-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-md);
        }
        .whitepaper-hero .wp-cover .cover-badge {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: rgba(11, 12, 13, 0.8);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(196, 154, 75, 0.4);
            color: var(--gold);
            font-size: 0.7rem;
            letter-spacing: 0.12em;
            padding: 0.4rem 0.9rem;
            border-radius: var(--radius-pill);
            text-transform: uppercase;
            font-weight: 500;
        }
        .whitepaper-hero .wp-title {
            font-family: var(--font-serif);
            font-weight: 800;
            font-size: clamp(1.5rem, 2.8vw, 2.2rem);
            color: var(--cloud);
            letter-spacing: -0.01em;
            margin-bottom: 0.75rem;
            line-height: 1.15;
        }
        .whitepaper-hero .wp-desc {
            font-size: 0.98rem;
            color: var(--mist);
            line-height: 1.75;
            margin-bottom: 1.25rem;
            font-weight: 300;
        }
        .wp-toc {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem;
            border-left: 2px solid var(--gold-dim);
            padding-left: 1.25rem;
        }
        .wp-toc li {
            font-size: 0.9rem;
            color: var(--mist);
            padding: 0.35rem 0;
            display: flex;
            align-items: baseline;
            gap: 0.75rem;
            line-height: 1.6;
        }
        .wp-toc li .toc-num {
            color: var(--gold);
            font-weight: 600;
            font-size: 0.75rem;
            min-width: 2rem;
            letter-spacing: 0.05em;
        }
        .wp-form-card {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
        }
        .wp-form-card .form-label {
            font-size: 0.82rem;
            color: var(--mist);
            letter-spacing: 0.04em;
            margin-bottom: 0.4rem;
        }
        .wp-form-card .form-control,
        .wp-form-card .form-select {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            color: var(--cloud);
            padding: 0.7rem 1rem;
            font-size: 0.9rem;
            transition: border-color 0.3s, box-shadow 0.3s;
            height: 44px;
        }
        .wp-form-card .form-control::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .wp-form-card .form-control:focus,
        .wp-form-card .form-select:focus {
            border-color: var(--gold);
            box-shadow: 0 0 0 3px rgba(196, 154, 75, 0.15);
            background: rgba(255, 255, 255, 0.08);
            color: var(--cloud);
        }
        .wp-form-card .btn-submit-wp {
            width: 100%;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--gold);
            color: var(--night);
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.04em;
            border: none;
            transition: all 0.35s var(--transition-smooth);
        }
        .wp-form-card .btn-submit-wp:hover {
            background: var(--gold-bright);
            transform: translateY(-1px);
            box-shadow: var(--shadow-btn);
        }
        /* ============ LIST 2-COL ============ */
        .list-2col-section {
            background: var(--night);
        }
        .card-list-2col {
            display: block;
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            box-shadow: var(--shadow-card);
            transition: all 0.4s var(--transition-smooth);
            margin-bottom: 2rem;
            height: 100%;
        }
        .card-list-2col:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(196, 154, 75, 0.3);
        }
        .card-list-2col .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .card-list-2col .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s var(--transition-smooth);
        }
        .card-list-2col:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .card-list-2col .card-tag {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            background: rgba(11, 12, 13, 0.78);
            backdrop-filter: blur(4px);
            color: var(--gold);
            font-size: 0.7rem;
            letter-spacing: 0.08em;
            padding: 0.3rem 0.75rem;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(196, 154, 75, 0.35);
            font-weight: 500;
        }
        .card-list-2col .card-body-content {
            padding: 1.25rem 1.4rem 1.4rem;
        }
        .card-list-2col .card-title {
            font-family: var(--font-serif);
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--cloud);
            line-height: 1.35;
            margin-bottom: 0.5rem;
            letter-spacing: -0.01em;
        }
        .card-list-2col .card-summary {
            font-size: 0.88rem;
            color: var(--mist);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.75rem;
            font-weight: 300;
        }
        .card-list-2col .card-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.75rem;
            color: var(--mist-dim);
        }
        .card-list-2col .card-meta .date {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .card-list-2col .card-meta .arrow {
            margin-left: auto;
            color: var(--gold);
            font-size: 0.9rem;
            transition: transform 0.35s var(--transition-smooth);
        }
        .card-list-2col:hover .card-meta .arrow {
            transform: translateX(6px);
        }
        /* ============ PAGINATION ============ */
        .pagination-kaiyun {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin-top: 2rem;
            flex-wrap: wrap;
        }
        .pagination-kaiyun .page-link {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            color: var(--mist);
            font-size: 0.88rem;
            background: transparent;
            transition: all 0.3s var(--transition-smooth);
            padding: 0;
        }
        .pagination-kaiyun .page-link:hover {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(196, 154, 75, 0.06);
            transform: translateY(-2px);
        }
        .pagination-kaiyun .page-item.active .page-link {
            background: var(--gold);
            border-color: var(--gold);
            color: var(--night);
            font-weight: 600;
        }
        .pagination-kaiyun .page-item.disabled .page-link {
            color: var(--mist-dim);
            border-color: var(--border-faint);
            pointer-events: none;
        }
        /* ============ DATA STRIP ============ */
        .data-strip-section {
            background: var(--night-soft);
            border-top: 1px solid var(--border-faint);
            border-bottom: 1px solid var(--border-faint);
        }
        .data-strip-item {
            text-align: center;
            padding: 2rem 1rem;
            position: relative;
        }
        .data-strip-item .data-value {
            font-family: var(--font-display);
            font-size: clamp(2.8rem, 5vw, 4.2rem);
            font-weight: 700;
            color: var(--gold);
            line-height: 1;
            letter-spacing: 0.02em;
        }
        .data-strip-item .data-unit {
            font-size: 0.9rem;
            color: var(--mist);
            margin-top: 0.4rem;
            letter-spacing: 0.04em;
        }
        .data-strip-item .data-label {
            font-size: 0.82rem;
            color: var(--mist-dim);
            margin-top: 0.5rem;
            letter-spacing: 0.03em;
        }
        @media (min-width: 768px) {
            .data-strip-item + .data-strip-item::before {
                content: '';
                position: absolute;
                left: 0;
                top: 50%;
                transform: translateY(-50%);
                height: 60%;
                width: 1px;
                background: var(--border-faint);
            }
        }
        /* ============ SCENARIOS ============ */
        .scenario-section {
            background: var(--night);
        }
        .scenario-card {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.4rem;
            height: 100%;
            transition: all 0.35s var(--transition-smooth);
            position: relative;
        }
        .scenario-card:hover {
            border-color: rgba(196, 154, 75, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }
        .scenario-card .scenario-num {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--gold);
            line-height: 1;
            margin-bottom: 0.75rem;
            letter-spacing: 0.04em;
        }
        .scenario-card .scenario-title {
            font-family: var(--font-serif);
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--cloud);
            margin-bottom: 0.5rem;
            letter-spacing: -0.01em;
        }
        .scenario-card .scenario-desc {
            font-size: 0.88rem;
            color: var(--mist);
            line-height: 1.65;
            font-weight: 300;
        }
        /* ============ STEPS ============ */
        .steps-section {
            background: var(--night-soft);
            border-top: 1px solid var(--border-faint);
            border-bottom: 1px solid var(--border-faint);
        }
        .step-item {
            position: relative;
            padding: 1rem 1rem 1.5rem 3.5rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-faint);
        }
        .step-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }
        .step-item .step-num {
            position: absolute;
            left: 0;
            top: 0.9rem;
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--gold);
            letter-spacing: 0.04em;
        }
        .step-item .step-title {
            font-family: var(--font-serif);
            font-weight: 700;
            font-size: 1.08rem;
            color: var(--cloud);
            margin-bottom: 0.35rem;
            letter-spacing: -0.01em;
        }
        .step-item .step-desc {
            font-size: 0.88rem;
            color: var(--mist);
            line-height: 1.65;
            font-weight: 300;
            max-width: 600px;
        }
        @media (min-width: 992px) {
            .step-item {
                padding-left: 3rem;
                padding-right: 2rem;
                border-bottom: none;
                border-right: 1px dashed var(--border-light);
                margin-bottom: 0;
            }
            .step-item:last-child {
                border-right: none;
            }
        }
        /* ============ FAQ ============ */
        .faq-section {
            background: var(--night);
        }
        .accordion-kaiyun .accordion-item {
            background: var(--night-card);
            border: none;
            border-bottom: 1px solid var(--border-faint);
            border-radius: 0 !important;
            margin-bottom: 0;
        }
        .accordion-kaiyun .accordion-item:first-child {
            border-top: 1px solid var(--border-faint);
        }
        .accordion-kaiyun .accordion-button {
            background: transparent;
            color: var(--cloud);
            font-family: var(--font-sans);
            font-weight: 500;
            font-size: 1rem;
            padding: 1.2rem 1.25rem;
            box-shadow: none !important;
            letter-spacing: 0.02em;
            border: none;
            border-left: 3px solid transparent;
            transition: all 0.3s var(--transition-smooth);
        }
        .accordion-kaiyun .accordion-button:not(.collapsed) {
            background: rgba(196, 154, 75, 0.04);
            color: var(--gold);
            border-left: 3px solid var(--gold);
        }
        .accordion-kaiyun .accordion-button::after {
            content: '+';
            background-image: none;
            font-size: 1.4rem;
            font-weight: 300;
            color: var(--gold);
            width: auto;
            height: auto;
            line-height: 1;
            transition: transform 0.35s var(--transition-smooth);
        }
        .accordion-kaiyun .accordion-button:not(.collapsed)::after {
            content: '−';
            transform: rotate(0deg);
        }
        .accordion-kaiyun .accordion-button:focus {
            outline: none;
            box-shadow: none;
        }
        .accordion-kaiyun .accordion-body {
            background: rgba(196, 154, 75, 0.02);
            color: var(--mist);
            font-size: 0.92rem;
            line-height: 1.75;
            padding: 1rem 1.25rem 1.25rem;
            font-weight: 300;
        }
        /* ============ CTA / CONTACT ============ */
        .contact-section {
            background: linear-gradient(to bottom, rgba(11, 12, 13, 0.88), rgba(11, 12, 13, 0.97)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-top: 1px solid var(--border-faint);
        }
        .contact-form-card {
            background: rgba(18, 19, 21, 0.75);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 2rem;
            box-shadow: var(--shadow-card);
        }
        .contact-form-card .form-label {
            font-size: 0.82rem;
            color: var(--mist);
            letter-spacing: 0.04em;
        }
        .contact-form-card .form-control,
        .contact-form-card .form-select {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            color: var(--cloud);
            padding: 0.7rem 1rem;
            font-size: 0.9rem;
            transition: border-color 0.3s, box-shadow 0.3s;
            min-height: 48px;
        }
        .contact-form-card .form-control::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .contact-form-card .form-control:focus,
        .contact-form-card .form-select:focus {
            border-color: var(--gold);
            box-shadow: 0 0 0 3px rgba(196, 154, 75, 0.15);
            background: rgba(255, 255, 255, 0.08);
            color: var(--cloud);
        }
        .contact-form-card textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .btn-submit-contact {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            height: 48px;
            padding: 0 2rem;
            border-radius: var(--radius-sm);
            background: var(--gold);
            color: var(--night);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.03em;
            border: none;
            transition: all 0.35s var(--transition-smooth);
        }
        .btn-submit-contact:hover {
            background: var(--gold-bright);
            transform: translateY(-1px);
            box-shadow: var(--shadow-btn);
        }
        /* ============ FOOTER ============ */
        .kaiyun-footer {
            background: var(--night);
            border-top: 1px solid var(--border-faint);
            padding: 3.5rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: 1.5rem;
            color: var(--cloud);
            letter-spacing: -0.01em;
            margin-bottom: 1rem;
            display: inline-block;
        }
        .footer-logo span {
            color: var(--gold);
        }
        .footer-brand-desc {
            font-size: 0.85rem;
            color: var(--mist-dim);
            line-height: 1.7;
            max-width: 380px;
            font-weight: 300;
        }
        .footer-nav-title {
            font-size: 0.82rem;
            color: var(--gold);
            letter-spacing: 0.1em;
            text-transform: uppercase;
            margin-bottom: 1rem;
            font-weight: 600;
        }
        .footer-nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-nav ul li {
            margin-bottom: 0.55rem;
        }
        .footer-nav ul li a {
            font-size: 0.88rem;
            color: var(--mist);
            transition: color 0.3s;
        }
        .footer-nav ul li a:hover {
            color: var(--gold);
        }
        .footer-contact-item {
            font-size: 0.85rem;
            color: var(--mist);
            margin-bottom: 0.55rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 300;
        }
        .footer-contact-item i {
            color: var(--gold);
            width: 1rem;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-faint);
            padding-top: 1.25rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--mist-dim);
        }
        .footer-bottom a {
            color: var(--mist);
            transition: color 0.3s;
        }
        .footer-bottom a:hover {
            color: var(--gold);
        }
        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
        }
        @media (max-width: 575.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }
        }
        /* ============ RESPONSIVE ============ */
        @media (max-width: 991.98px) {
            .section-pad {
                padding-top: var(--section-pad-mobile);
                padding-bottom: var(--section-pad-mobile);
            }
            .category-banner {
                min-height: 36vh;
                padding-top: 5rem;
            }
            .whitepaper-hero .wp-cover {
                aspect-ratio: 16 / 10;
                margin-bottom: 1.5rem;
            }
            .whitepaper-hero .wp-form-card {
                margin-top: 1rem;
            }
        }
        @media (max-width: 575.98px) {
            .category-banner {
                min-height: 32vh;
                padding-top: 4rem;
                padding-bottom: 2rem;
            }
            .category-banner h1 {
                font-size: clamp(1.8rem, 8vw, 2.5rem);
            }
            .card-list-2col .card-title {
                font-size: 1rem;
            }
            .card-list-2col .card-summary {
                -webkit-line-clamp: 4;
            }
            .data-strip-item {
                padding: 1.25rem 0.5rem;
            }
            .data-strip-item .data-value {
                font-size: 2.2rem;
            }
            .step-item {
                padding-left: 2.5rem;
            }
            .step-item .step-num {
                font-size: 1.1rem;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }
        /* Reveal animation */
        .fade-up-anim {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.55s var(--transition-smooth) forwards;
        }
        .delay-1 {
            animation-delay: 0.08s;
        }
        .delay-2 {
            animation-delay: 0.16s;
        }
        .delay-3 {
            animation-delay: 0.24s;
        }
        .delay-4 {
            animation-delay: 0.32s;
        }
        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

/* roulang page: category4 */
:root {
  --night: #0B0C0D;
  --night-soft: #121315;
  --night-card: #181A1C;
  --cloud: #F2F0E9;
  --mist: #C8CDD0;
  --mist-dim: #8F989E;
  --gold: #C49A4B;
  --gold-bright: #D9AC5F;
  --gold-dim: #8F6F37;
  --amber: #B8822F;
  --red-dark: #8C2F2A;
  --orange-dark: #B65F2B;
  --border-faint: rgba(242, 240, 233, 0.08);
  --border-light: rgba(242, 240, 233, 0.15);
  --border-mist: rgba(200, 205, 208, 0.28);
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 16px 40px rgba(0, 0, 0, 0.35);
  --shadow-card-hover: 0 0 0 1px rgba(196, 154, 75, 0.25), 0 24px 48px rgba(0, 0, 0, 0.45);
  --shadow-btn: 0 8px 24px rgba(196, 154, 75, 0.18);
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', 'Georgia', serif;
  --font-sans: 'Noto Sans SC', 'Source Han Sans SC', '思源黑体', system-ui, sans-serif;
  --font-display: 'Oswald', 'Bebas Neue', 'Noto Sans SC', sans-serif;
  --transition-smooth: cubic-bezier(0.22, 0.61, 0.36, 1);
  --gutter-x: 2rem;
  --gutter-y: 3rem;
  --nav-height: 72px;
  --section-pad-desktop: 96px;
  --section-pad-mobile: 56px;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
  background-color: var(--night);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s var(--transition-smooth), border-color 0.3s var(--transition-smooth), background-color 0.3s var(--transition-smooth);
}
a:hover {
  color: var(--gold);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}
button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}
button:focus, a:focus, input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.container {
  max-width: 1320px;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.section-pad {
  padding-top: var(--section-pad-desktop);
  padding-bottom: var(--section-pad-desktop);
}
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid rgba(196, 154, 75, 0.4);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.25rem;
  font-weight: 500;
}
.section-title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1.08;
  color: var(--cloud);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.section-subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--mist-dim);
  line-height: 1.7;
  max-width: 720px;
  margin-bottom: 2.5rem;
}
/* ============ NAVBAR ============ */
.kaiyun-navbar {
  position: sticky;
  top: 0;
  z-index: 1030;
  height: var(--nav-height);
  background: rgba(10, 11, 13, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--transition-smooth), background-color 0.4s var(--transition-smooth);
}
.kaiyun-navbar.scrolled {
  border-bottom-color: rgba(242, 240, 233, 0.08);
  background: rgba(10, 11, 13, 0.92);
}
.navbar-brand-logo {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  color: var(--cloud);
  white-space: nowrap;
}
.navbar-brand-logo span {
  color: var(--gold);
}
.navbar-brand-logo:hover {
  color: var(--cloud);
}
.navbar .nav-link {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--mist);
  padding: 0.5rem 0.9rem;
  position: relative;
  transition: color 0.3s var(--transition-smooth);
  white-space: nowrap;
}
.navbar .nav-link::after {
  content: '';
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.2rem;
  height: 1px;
  background-color: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--transition-smooth);
}
.navbar .nav-link:hover::after,
.navbar .nav-link.active::after {
  transform: scaleX(1);
}
.navbar .nav-link:hover {
  color: var(--gold);
}
.navbar .nav-link.active {
  color: var(--gold);
}
.navbar-toggler {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--transition-smooth);
}
.navbar-toggler:focus {
  box-shadow: none;
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23F2F0E9' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
.lang-switch-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  height: 32px;
  padding: 0 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border-light);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--mist);
  letter-spacing: 0.06em;
  transition: all 0.3s var(--transition-smooth);
  white-space: nowrap;
}
.lang-switch-pill .lang-active {
  color: var(--gold);
}
.lang-switch-pill:hover {
  border-color: var(--gold);
  background: rgba(196, 154, 75, 0.06);
  color: var(--gold);
}
.btn-kaiyun-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  padding: 0 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--gold);
  color: #0B0C0D;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: all 0.3s var(--transition-smooth);
  white-space: nowrap;
}
.btn-kaiyun-nav:hover {
  background: var(--gold-bright);
  color: #0B0C0D;
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn);
}
.mobile-lang-wrapper {
  border-top: 1px solid var(--border-faint);
}
/* ============ CATEGORY BANNER ============ */
.category-banner {
  position: relative;
  min-height: 44vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background-color: var(--night-soft);
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center 35%;
  box-shadow: inset 0 0 120px rgba(0,0,0,0.65);
}
.category-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11,12,13,0.96) 0%, rgba(11,12,13,0.55) 50%, rgba(11,12,13,0.35) 100%);
  pointer-events: none;
}
.category-banner .banner-content {
  position: relative;
  z-index: 2;
  padding-bottom: 3rem;
}
.category-banner .breadcrumb-kaiyun {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--mist-dim);
  margin-bottom: 1rem;
}
.category-banner .breadcrumb-kaiyun a {
  color: var(--mist-dim);
  transition: color 0.3s var(--transition-smooth);
}
.category-banner .breadcrumb-kaiyun a:hover {
  color: var(--gold);
}
.category-banner .breadcrumb-kaiyun .sep {
  color: rgba(200, 205, 208, 0.5);
}
.category-banner .banner-h1 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.05;
  color: var(--cloud);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.category-banner .banner-h1 span {
  color: var(--gold);
}
.category-banner .banner-desc {
  font-size: 1rem;
  font-weight: 300;
  color: var(--mist);
  max-width: 520px;
  line-height: 1.6;
}
/* ============ DATA STRIP ============ */
.data-strip {
  background: var(--night-soft);
  border-bottom: 1px solid var(--border-faint);
  padding: 2.5rem 0;
}
.data-strip .strip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem 2rem;
}
.strip-item {
  text-align: left;
  padding-left: 1.5rem;
  border-left: 2px solid var(--gold-dim);
}
.strip-item .strip-number {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  letter-spacing: -0.01em;
}
.strip-item .strip-label {
  font-size: 0.86rem;
  color: var(--mist-dim);
  margin-top: 0.3rem;
  letter-spacing: 0.04em;
}
/* ============ ROW LIST (通栏行式列表) ============ */
.rowlist-section {
  background: var(--night);
}
.rowlist-section .rowlist-head {
  margin-bottom: 3rem;
}
.rowlist-wrapper {
  border-top: 1px solid var(--border-faint);
}
.rowlist-item {
  display: flex;
  align-items: stretch;
  gap: 1.5rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border-faint);
  position: relative;
  transition: background-color 0.3s var(--transition-smooth);
}
.rowlist-item:hover {
  background: rgba(196, 154, 75, 0.025);
}
.rowlist-item .rowlist-img {
  flex: 0 0 280px;
  max-width: 280px;
  overflow: hidden;
  border-radius: var(--radius-sm);
}
.rowlist-item .rowlist-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--transition-smooth);
}
.rowlist-item:hover .rowlist-img img {
  transform: scale(1.04);
}
.rowlist-item .rowlist-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.rowlist-item .rowlist-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.rowlist-item .rowlist-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--mist);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pill);
  letter-spacing: 0.06em;
  transition: all 0.3s var(--transition-smooth);
}
.rowlist-item:hover .rowlist-tag {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(196, 154, 75, 0.08);
}
.rowlist-item .rowlist-date {
  font-size: 0.72rem;
  color: var(--mist-dim);
  letter-spacing: 0.04em;
}
.rowlist-item .rowlist-title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--cloud);
  line-height: 1.2;
  margin-bottom: 0.4rem;
  transition: color 0.3s var(--transition-smooth);
  letter-spacing: -0.01em;
}
.rowlist-item:hover .rowlist-title {
  color: var(--gold);
}
.rowlist-item .rowlist-summary {
  font-size: 0.92rem;
  color: var(--mist-dim);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.rowlist-item .rowlist-arrow {
  align-self: center;
  font-size: 1.1rem;
  color: var(--mist-dim);
  transition: all 0.35s var(--transition-smooth);
  padding: 0 0.5rem;
}
.rowlist-item:hover .rowlist-arrow {
  color: var(--gold);
  transform: translateX(6px);
}
/* ============ PAGINATION ============ */
.kaiyun-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  margin-top: 2.5rem;
}
.kaiyun-pagination .page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: transparent;
  color: var(--mist);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.3s var(--transition-smooth);
}
.kaiyun-pagination .page-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(196, 154, 75, 0.06);
  transform: translateY(-2px);
}
.kaiyun-pagination .page-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #0B0C0D;
  font-weight: 700;
}
.kaiyun-pagination .page-btn.disabled {
  opacity: 0.35;
  pointer-events: none;
}
/* ============ PROCESS ============ */
.process-section {
  background: var(--night-soft);
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem 2rem;
  margin-top: 2rem;
}
.process-step {
  position: relative;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-light);
}
.process-step .step-num {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.02em;
  margin-bottom: 0.55rem;
}
.process-step .step-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cloud);
  letter-spacing: -0.01em;
  margin-bottom: 0.4rem;
}
.process-step .step-desc {
  font-size: 0.88rem;
  color: var(--mist-dim);
  line-height: 1.6;
  max-width: 220px;
}
.process-step::before {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: width 0.5s var(--transition-smooth);
}
.process-step:hover::before {
  width: 100%;
}
/* ============ FAQ ============ */
.faq-section {
  background: var(--night);
}
.accordion-kaiyun .accordion-item {
  background: var(--night-card);
  border: none;
  border-bottom: 1px solid var(--border-faint);
  margin-bottom: 0.5rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: background-color 0.3s var(--transition-smooth);
}
.accordion-kaiyun .accordion-item:has(.accordion-button:not(.collapsed)) {
  background: #1d1f21;
  box-shadow: inset 3px 0 0 0 var(--gold);
}
.accordion-kaiyun .accordion-button {
  background: transparent;
  color: var(--cloud);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 1.15rem 1.25rem;
  letter-spacing: 0.01em;
  box-shadow: none;
  border: none;
  transition: color 0.3s var(--transition-smooth);
}
.accordion-kaiyun .accordion-button::after {
  content: '\f068';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  background: none;
  width: auto;
  height: auto;
  color: var(--mist-dim);
  font-size: 0.85rem;
  transition: transform 0.35s var(--transition-smooth);
}
.accordion-kaiyun .accordion-button.collapsed::after {
  content: '\f067';
}
.accordion-kaiyun .accordion-button:not(.collapsed)::after {
  color: var(--gold);
}
.accordion-kaiyun .accordion-button:focus {
  box-shadow: none;
  outline: none;
}
.accordion-kaiyun .accordion-button:not(.collapsed) {
  color: var(--gold);
}
.accordion-kaiyun .accordion-body {
  padding: 0 1.25rem 1.25rem 1.25rem;
  font-size: 0.94rem;
  color: var(--mist-dim);
  line-height: 1.7;
  border-top: 1px solid var(--border-faint);
  margin-top: 0.35rem;
  padding-top: 1rem;
}
/* ============ CTA ============ */
.cta-section {
  background: #0B0C0D;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}
.cta-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(11,12,13,0.82);
  pointer-events: none;
}
.cta-section .container {
  position: relative;
  z-index: 2;
}
.cta-title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  color: var(--cloud);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.cta-subtitle {
  font-size: 1rem;
  font-weight: 300;
  color: var(--mist);
  max-width: 520px;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}
.btn-kaiyun-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.9rem;
  background: var(--gold);
  color: #0B0C0D;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  border: none;
  transition: all 0.3s var(--transition-smooth);
}
.btn-kaiyun-primary:hover {
  background: var(--gold-bright);
  color: #0B0C0D;
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn);
}
.btn-kaiyun-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.9rem;
  background: transparent;
  color: var(--cloud);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-mist);
  transition: all 0.3s var(--transition-smooth);
}
.btn-kaiyun-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(196, 154, 75, 0.06);
}
/* ============ FOOTER ============ */
.kaiyun-footer {
  background: #080909;
  border-top: 1px solid var(--border-faint);
  padding-top: 4rem;
  padding-bottom: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.4fr;
  gap: 3rem;
  padding-bottom: 2.5rem;
}
.footer-logo {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.6rem;
  color: var(--cloud);
  letter-spacing: -0.01em;
  display: inline-block;
  margin-bottom: 0.7rem;
}
.footer-logo:hover {
  color: var(--gold);
}
.footer-brand-desc {
  font-size: 0.88rem;
  color: var(--mist-dim);
  line-height: 1.7;
  max-width: 340px;
}
.footer-nav-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--cloud);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-nav ul li {
  margin-bottom: 0.55rem;
}
.footer-nav ul li a {
  font-size: 0.88rem;
  color: var(--mist-dim);
  transition: color 0.3s var(--transition-smooth);
}
.footer-nav ul li a:hover {
  color: var(--gold);
}
.footer-contact-item {
  font-size: 0.88rem;
  color: var(--mist-dim);
  margin-bottom: 0.55rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.footer-contact-item i {
  color: var(--gold-dim);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid var(--border-faint);
  padding: 1.2rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.72rem;
  color: var(--mist-dim);
}
.footer-bottom a {
  color: var(--mist-dim);
  transition: color 0.3s var(--transition-smooth);
}
.footer-bottom a:hover {
  color: var(--gold);
}
/* ============ ANIMATIONS ============ */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--transition-smooth), transform 0.6s var(--transition-smooth);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .rowlist-item:hover .rowlist-img img {
    transform: none;
  }
}
/* ============ RESPONSIVE ============ */
@media (max-width: 991px) {
  .rowlist-item .rowlist-img {
    flex: 0 0 220px;
    max-width: 220px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}
@media (max-width: 768px) {
  .section-pad {
    padding-top: var(--section-pad-mobile);
    padding-bottom: var(--section-pad-mobile);
  }
  .data-strip .strip-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
  .rowlist-item {
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem 0;
  }
  .rowlist-item .rowlist-img {
    flex: 0 0 auto;
    max-width: 100%;
    aspect-ratio: 16/9;
  }
  .rowlist-item .rowlist-arrow {
    align-self: flex-end;
  }
  .process-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
  .process-step .step-desc {
    max-width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 576px) {
  .category-banner {
    min-height: 38vh;
  }
  .category-banner .banner-h1 {
    font-size: 1.9rem;
  }
  .data-strip .strip-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .strip-item {
    border-left: none;
    border-bottom: 1px solid var(--border-faint);
    padding-left: 0;
    padding-bottom: 1rem;
  }
  .kaiyun-pagination .page-btn {
    width: 36px;
    height: 36px;
    font-size: 0.8rem;
  }
  .cta-title {
    font-size: 1.7rem;
  }
}

/* roulang page: category3 */
:root {
            --night: #0B0C0D;
            --night-soft: #121315;
            --night-card: #181A1C;
            --cloud: #F2F0E9;
            --mist: #C8CDD0;
            --mist-dim: #8F989E;
            --gold: #C49A4B;
            --gold-bright: #D9AC5F;
            --gold-dim: #8F6F37;
            --amber: #B8822F;
            --red-dark: #8C2F2A;
            --orange-dark: #B65F2B;
            --border-faint: rgba(242, 240, 233, 0.08);
            --border-light: rgba(242, 240, 233, 0.15);
            --border-mist: rgba(200, 205, 208, 0.28);
            --radius-sm: 2px;
            --radius-md: 4px;
            --radius-lg: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 16px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 0 0 1px rgba(196, 154, 75, 0.25), 0 24px 48px rgba(0, 0, 0, 0.45);
            --shadow-btn: 0 8px 24px rgba(196, 154, 75, 0.18);
            --font-serif: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', serif;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', '思源黑体', system-ui, sans-serif;
            --font-display: 'Oswald', 'Bebas Neue', 'Noto Sans SC', sans-serif;
            --transition-smooth: cubic-bezier(0.22, 0.61, 0.36, 1);
            --gutter-x: 2rem;
            --gutter-y: 3rem;
            --nav-height: 72px;
            --section-pad-desktop: 96px;
            --section-pad-mobile: 56px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--mist);
            background-color: var(--night);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            background-image: radial-gradient(ellipse at 20% 10%, rgba(196, 154, 75, 0.03) 0%, transparent 55%), radial-gradient(ellipse at 80% 90%, rgba(140, 47, 42, 0.04) 0%, transparent 45%);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s var(--transition-smooth), border-color 0.3s var(--transition-smooth), background-color 0.3s var(--transition-smooth), transform 0.3s var(--transition-smooth);
        }
        a:hover {
            color: var(--gold);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button:focus, a:focus, input:focus, textarea:focus, select:focus {
            outline: 2px solid var(--gold);
            outline-offset: 3px;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-serif);
            color: var(--cloud);
            line-height: 1.15;
            letter-spacing: -0.02em;
        }
        .container {
            max-width: 1320px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        .section-pad {
            padding-top: var(--section-pad-desktop);
            padding-bottom: var(--section-pad-desktop);
        }
        .section-pad-sm {
            padding-top: 64px;
            padding-bottom: 64px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--gold);
            border: 1px solid rgba(196, 154, 75, 0.4);
            padding: 0.35rem 0.9rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1.25rem;
            font-weight: 500;
            background: rgba(196, 154, 75, 0.05);
        }
        .section-title {
            font-family: var(--font-serif);
            font-weight: 800;
            font-size: clamp(1.75rem, 3.5vw, 2.75rem);
            line-height: 1.12;
            color: var(--cloud);
            letter-spacing: -0.02em;
            margin-bottom: 0.85rem;
        }
        .section-subtitle {
            font-size: 1rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.7;
            max-width: 680px;
            margin-bottom: 2.2rem;
        }

        /* ============ NAVBAR ============ */
        .kaiyun-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            height: var(--nav-height);
            background: rgba(10, 11, 13, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: border-color 0.4s var(--transition-smooth), background-color 0.4s var(--transition-smooth);
        }
        .kaiyun-navbar.scrolled {
            border-bottom-color: rgba(242, 240, 233, 0.08);
            background: rgba(10, 11, 13, 0.92);
        }
        .navbar-brand-logo {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.01em;
            color: var(--cloud);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            line-height: 1;
        }
        .navbar-brand-logo span {
            color: var(--gold);
            margin-left: 2px;
        }
        .navbar-brand-logo:hover {
            color: var(--cloud);
        }
        .navbar .nav-link {
            font-family: var(--font-sans);
            font-size: 0.9rem;
            font-weight: 400;
            letter-spacing: 0.05em;
            color: var(--mist);
            padding: 0.5rem 0.9rem;
            position: relative;
            transition: color 0.3s var(--transition-smooth);
            white-space: nowrap;
        }
        .navbar .nav-link::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.1rem;
            height: 1.5px;
            background-color: var(--gold);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.35s var(--transition-smooth);
        }
        .navbar .nav-link:hover::after,
        .navbar .nav-link.active::after {
            transform: scaleX(1);
        }
        .navbar .nav-link.active {
            color: var(--gold);
        }
        .lang-switch-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            height: 32px;
            padding: 0 0.8rem;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-pill);
            color: var(--mist);
            font-size: 0.78rem;
            letter-spacing: 0.05em;
            font-weight: 500;
            transition: all 0.3s var(--transition-smooth);
            white-space: nowrap;
        }
        .lang-switch-pill:hover {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(196, 154, 75, 0.06);
        }
        .lang-switch-pill .lang-active {
            color: var(--gold);
            font-weight: 700;
        }
        .btn-kaiyun-nav {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 36px;
            padding: 0 1.2rem;
            background: var(--gold);
            color: var(--night);
            border-radius: var(--radius-sm);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 1px solid var(--gold);
            transition: all 0.3s var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-kaiyun-nav:hover {
            background: var(--gold-bright);
            color: var(--night);
            transform: translateY(-1px);
            box-shadow: var(--shadow-btn);
        }
        .navbar-toggler {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--cloud);
            transition: border-color 0.3s var(--transition-smooth);
        }
        .navbar-toggler:hover {
            border-color: var(--gold);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px rgba(196, 154, 75, 0.4);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(242, 240, 233, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
            width: 1.25rem;
            height: 1.25rem;
        }
        .mobile-lang-wrapper {
            border-top: 1px solid var(--border-faint);
        }
        .navbar-collapse {
            transition: height 0.35s var(--transition-smooth);
        }

        /* ============ CATEGORY HERO ============ */
        .cat-hero {
            position: relative;
            min-height: 42vh;
            display: flex;
            align-items: flex-end;
            padding: 5rem 0 3.5rem;
            background-image: linear-gradient(rgba(11, 12, 13, 0.65), rgba(11, 12, 13, 0.82)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center 35%;
            border-bottom: 1px solid var(--border-faint);
            overflow: hidden;
        }
        .cat-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 25% 30%, rgba(196, 154, 75, 0.08) 0%, transparent 50%);
            pointer-events: none;
        }
        .cat-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb-kaiyun {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.82rem;
            color: var(--mist-dim);
            margin-bottom: 1rem;
            letter-spacing: 0.03em;
        }
        .breadcrumb-kaiyun a {
            color: var(--mist);
            transition: color 0.3s var(--transition-smooth);
        }
        .breadcrumb-kaiyun a:hover {
            color: var(--gold);
        }
        .breadcrumb-kaiyun .sep {
            color: var(--gold-dim);
            font-size: 0.7rem;
        }
        .breadcrumb-kaiyun .current {
            color: var(--gold);
        }
        .cat-hero h1 {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: clamp(2rem, 4.5vw, 3.5rem);
            line-height: 1.08;
            color: var(--cloud);
            letter-spacing: -0.025em;
            margin-bottom: 0.9rem;
            text-shadow: 0 2px 18px rgba(0, 0, 0, 0.5);
        }
        .cat-hero-desc {
            font-size: 0.95rem;
            font-weight: 300;
            color: var(--mist);
            max-width: 560px;
            line-height: 1.65;
            background: rgba(11, 12, 13, 0.45);
            padding: 0.75rem 1.2rem;
            border-left: 3px solid var(--gold);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }

        /* ============ MAIN LAYOUT ============ */
        .strategy-main {
            padding-top: 3.5rem;
            padding-bottom: 5rem;
            background: var(--night);
        }
        .strategy-layout {
            display: grid;
            grid-template-columns: 240px 1fr;
            gap: 2.5rem;
            align-items: start;
        }
        .strategy-sidebar {
            position: sticky;
            top: calc(var(--nav-height) + 2rem);
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }
        .strategy-sidebar .sidebar-title {
            font-size: 0.78rem;
            letter-spacing: 0.16em;
            text-transform: uppercase;
            color: var(--mist-dim);
            font-weight: 600;
            margin-bottom: 0.4rem;
            padding-left: 0.3rem;
        }
        .side-tag {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1rem;
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-sm);
            color: var(--mist);
            font-size: 0.88rem;
            letter-spacing: 0.04em;
            cursor: pointer;
            transition: all 0.3s var(--transition-smooth);
            background: transparent;
            text-align: left;
            font-weight: 400;
            position: relative;
        }
        .side-tag::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--mist-dim);
            transition: background 0.3s var(--transition-smooth);
            flex-shrink: 0;
        }
        .side-tag:hover {
            border-color: var(--gold-dim);
            color: var(--cloud);
            background: rgba(196, 154, 75, 0.05);
            transform: translateX(4px);
        }
        .side-tag:hover::before {
            background: var(--gold);
        }
        .side-tag.active {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(196, 154, 75, 0.08);
            font-weight: 500;
        }
        .side-tag.active::before {
            background: var(--gold);
            box-shadow: 0 0 8px rgba(196, 154, 75, 0.5);
        }
        .strategy-content {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .strategy-content-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 0.5rem;
        }
        .strategy-content-header .count-info {
            font-size: 0.85rem;
            color: var(--mist-dim);
            letter-spacing: 0.04em;
        }
        .strategy-content-header .count-info strong {
            color: var(--gold);
            font-weight: 700;
            font-size: 1.1rem;
        }

        /* ============ HORIZONTAL CARD ============ */
        .h-card {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 1.5rem;
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.4s var(--transition-smooth);
            box-shadow: var(--shadow-card);
            min-height: 170px;
        }
        .h-card:hover {
            border-color: rgba(196, 154, 75, 0.3);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .h-card .h-card-img {
            position: relative;
            overflow: hidden;
            min-height: 100%;
            background: var(--night-soft);
        }
        .h-card .h-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.55s var(--transition-smooth);
        }
        .h-card:hover .h-card-img img {
            transform: scale(1.05);
        }
        .h-card .h-card-img .img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 12, 13, 0.4) 0%, transparent 40%, rgba(11, 12, 13, 0.3) 100%);
            pointer-events: none;
        }
        .h-card .h-card-body {
            padding: 1.35rem 1.5rem 1.35rem 0.3rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 0.6rem;
            min-width: 0;
        }
        .h-card .h-card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .h-card .h-card-tag {
            display: inline-block;
            font-size: 0.72rem;
            letter-spacing: 0.06em;
            color: var(--gold);
            border: 1px solid rgba(196, 154, 75, 0.35);
            padding: 0.2rem 0.65rem;
            border-radius: var(--radius-pill);
            font-weight: 500;
            transition: all 0.3s var(--transition-smooth);
        }
        .h-card:hover .h-card-tag {
            background: rgba(196, 154, 75, 0.1);
            border-color: var(--gold);
        }
        .h-card .h-card-date {
            font-size: 0.76rem;
            color: var(--mist-dim);
            letter-spacing: 0.04em;
        }
        .h-card .h-card-title {
            font-family: var(--font-serif);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--cloud);
            line-height: 1.3;
            letter-spacing: -0.01em;
            transition: color 0.3s var(--transition-smooth);
            margin: 0;
        }
        .h-card:hover .h-card-title {
            color: var(--gold);
        }
        .h-card .h-card-summary {
            font-size: 0.9rem;
            font-weight: 300;
            color: var(--mist);
            line-height: 1.65;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .h-card .h-card-arrow {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.82rem;
            color: var(--mist-dim);
            letter-spacing: 0.05em;
            transition: all 0.3s var(--transition-smooth);
            margin-top: 0.15rem;
        }
        .h-card .h-card-arrow i {
            transition: transform 0.35s var(--transition-smooth);
            font-size: 0.75rem;
        }
        .h-card:hover .h-card-arrow {
            color: var(--gold);
        }
        .h-card:hover .h-card-arrow i {
            transform: translateX(6px);
        }

        /* ============ PAGINATION ============ */
        .kaiyun-pagination {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            justify-content: center;
            margin-top: 2rem;
        }
        .kaiyun-pagination .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 0.7rem;
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-sm);
            color: var(--mist);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            cursor: pointer;
            transition: all 0.3s var(--transition-smooth);
            background: transparent;
        }
        .kaiyun-pagination .page-btn:hover {
            border-color: var(--gold-dim);
            color: var(--gold);
            transform: translateY(-2px);
            background: rgba(196, 154, 75, 0.05);
        }
        .kaiyun-pagination .page-btn.active {
            background: var(--gold);
            color: var(--night);
            border-color: var(--gold);
            font-weight: 700;
            box-shadow: var(--shadow-btn);
        }
        .kaiyun-pagination .page-btn.disabled {
            opacity: 0.35;
            pointer-events: none;
        }

        /* ============ CAPABILITY / STATS ============ */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            border-top: 1px solid var(--border-faint);
            border-bottom: 1px solid var(--border-faint);
            padding: 2.8rem 0;
            margin-top: 3rem;
        }
        .stat-item {
            text-align: center;
            padding: 0 1.5rem;
            position: relative;
        }
        .stat-item + .stat-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 15%;
            height: 70%;
            width: 1px;
            background: var(--border-faint);
        }
        .stat-number {
            font-family: var(--font-display);
            font-size: clamp(2.5rem, 5vw, 3.6rem);
            font-weight: 700;
            color: var(--gold);
            line-height: 1;
            letter-spacing: -0.02em;
        }
        .stat-unit {
            font-size: 0.85rem;
            color: var(--mist-dim);
            margin-bottom: 0.5rem;
        }
        .stat-label {
            font-size: 0.85rem;
            font-weight: 400;
            color: var(--mist);
            letter-spacing: 0.04em;
        }

        /* ============ SCENE / CAPABILITY ============ */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
            margin-top: 2rem;
        }
        .scene-card {
            background: var(--night-card);
            border: 1px solid var(--border-faint);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.4rem;
            transition: all 0.4s var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .scene-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 100%;
            background: var(--gold);
            opacity: 0;
            transition: opacity 0.35s var(--transition-smooth);
        }
        .scene-card:hover {
            border-color: rgba(196, 154, 75, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .scene-card:hover::before {
            opacity: 1;
        }
        .scene-card .scene-icon {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: rgba(196, 154, 75, 0.08);
            color: var(--gold);
            font-size: 1.1rem;
            margin-bottom: 1rem;
            border: 1px solid rgba(196, 154, 75, 0.2);
        }
        .scene-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--cloud);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }
        .scene-card p {
            font-size: 0.88rem;
            font-weight: 300;
            color: var(--mist);
            line-height: 1.6;
            margin: 0;
        }

        /* ============ PROCESS ============ */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
            margin-top: 2rem;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 45px;
            left: 8%;
            right: 8%;
            height: 1px;
            background: repeating-linear-gradient(90deg, var(--border-mist) 0 6px, transparent 6px 12px);
            z-index: 0;
        }
        .process-step {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 0.7rem;
        }
        .process-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 90px;
            height: 90px;
            border-radius: 50%;
            background: var(--night-card);
            border: 1px solid var(--border-mist);
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--gold);
            letter-spacing: 0.04em;
            margin-bottom: 1.2rem;
            transition: all 0.4s var(--transition-smooth);
        }
        .process-step:hover .step-num {
            border-color: var(--gold);
            background: rgba(196, 154, 75, 0.08);
            box-shadow: 0 0 24px rgba(196, 154, 75, 0.15);
            transform: translateY(-4px);
        }
        .process-step h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--cloud);
            margin-bottom: 0.4rem;
            line-height: 1.3;
        }
        .process-step p {
            font-size: 0.85rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.55;
            margin: 0;
        }

        /* ============ FAQ ============ */
        .accordion-kaiyun .accordion-item {
            background: var(--night-card);
            border: none;
            border-bottom: 1px solid var(--border-faint);
            border-radius: 0;
        }
        .accordion-kaiyun .accordion-item:first-child {
            border-top: 1px solid var(--border-faint);
        }
        .accordion-kaiyun .accordion-button {
            background: var(--night-card);
            color: var(--cloud);
            font-family: var(--font-sans);
            font-size: 1rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            padding: 1.15rem 1.2rem;
            border: none;
            box-shadow: none;
            transition: all 0.3s var(--transition-smooth);
            position: relative;
        }
        .accordion-kaiyun .accordion-button::after {
            content: '';
            width: 14px;
            height: 2px;
            background: var(--mist);
            border-radius: 1px;
            transition: all 0.35s var(--transition-smooth);
            position: absolute;
            right: 1.2rem;
            top: 50%;
            transform: translateY(-50%);
        }
        .accordion-kaiyun .accordion-button:not(.collapsed)::after {
            background: var(--gold);
            transform: translateY(-50%) rotate(90deg);
        }
        .accordion-kaiyun .accordion-button:hover {
            color: var(--gold);
            background: rgba(196, 154, 75, 0.04);
        }
        .accordion-kaiyun .accordion-button:not(.collapsed) {
            background: rgba(196, 154, 75, 0.07);
            color: var(--gold);
            box-shadow: none;
        }
        .accordion-kaiyun .accordion-body {
            background: var(--night-card);
            padding: 0.8rem 1.2rem 1.3rem;
            color: var(--mist);
            font-size: 0.92rem;
            line-height: 1.75;
            border-left: 3px solid var(--gold);
            margin-left: 1.2rem;
            border-radius: 0;
        }
        .accordion-kaiyun .accordion-item:has(.accordion-button:not(.collapsed)) {
            background: rgba(196, 154, 75, 0.05);
        }

        /* ============ CTA ============ */
        .cta-section {
            position: relative;
            padding: 5.5rem 0;
            background-image: linear-gradient(rgba(11, 12, 13, 0.78), rgba(11, 12, 13, 0.86)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            border-top: 1px solid var(--border-faint);
            border-bottom: 1px solid var(--border-faint);
            text-align: center;
        }
        .cta-section .section-title {
            color: var(--cloud);
            margin-bottom: 0.8rem;
        }
        .cta-section .section-subtitle {
            margin-left: auto;
            margin-right: auto;
            color: var(--mist);
        }
        .form-kaiyun {
            max-width: 560px;
            margin: 2rem auto 0;
            text-align: left;
        }
        .form-kaiyun .form-label {
            font-size: 0.85rem;
            color: var(--mist);
            letter-spacing: 0.03em;
            margin-bottom: 0.4rem;
            font-weight: 500;
        }
        .form-kaiyun .form-control {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(242, 240, 233, 0.18);
            border-radius: var(--radius-sm);
            color: var(--cloud);
            height: 48px;
            padding: 0 1rem;
            font-size: 0.92rem;
            transition: all 0.35s var(--transition-smooth);
            box-shadow: none;
        }
        .form-kaiyun .form-control::placeholder {
            color: rgba(242, 240, 233, 0.35);
        }
        .form-kaiyun .form-control:focus {
            border-color: var(--gold);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: 0 0 0 3px rgba(196, 154, 75, 0.2);
            outline: none;
        }
        .form-kaiyun textarea.form-control {
            height: auto;
            min-height: 110px;
            padding: 0.8rem 1rem;
            resize: vertical;
        }
        .btn-kaiyun {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--gold);
            color: var(--night);
            border: 1px solid var(--gold);
            border-radius: var(--radius-sm);
            padding: 0.75rem 1.8rem;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            cursor: pointer;
            transition: all 0.35s var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-kaiyun:hover {
            background: var(--gold-bright);
            color: var(--night);
            transform: translateY(-1px);
            box-shadow: var(--shadow-btn);
        }
        .btn-kaiyun-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: transparent;
            color: var(--cloud);
            border: 1px solid var(--border-mist);
            border-radius: var(--radius-sm);
            padding: 0.75rem 1.8rem;
            font-size: 0.92rem;
            font-weight: 500;
            letter-spacing: 0.05em;
            cursor: pointer;
            transition: all 0.35s var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-kaiyun-outline:hover {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(196, 154, 75, 0.06);
            transform: translateY(-1px);
        }

        /* ============ FOOTER ============ */
        .kaiyun-footer {
            background: var(--night-soft);
            border-top: 1px solid var(--border-faint);
            padding: 4rem 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.3fr;
            gap: 3rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid var(--border-faint);
        }
        .footer-logo {
            font-family: var(--font-serif);
            font-weight: 900;
            font-size: 1.4rem;
            letter-spacing: -0.01em;
            color: var(--cloud);
            display: inline-block;
            margin-bottom: 1rem;
        }
        .footer-logo span {
            color: var(--gold);
        }
        .footer-brand-desc {
            font-size: 0.88rem;
            font-weight: 300;
            color: var(--mist-dim);
            line-height: 1.7;
            max-width: 340px;
            margin-bottom: 0;
        }
        .footer-nav-title {
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--mist);
            margin-bottom: 1.2rem;
        }
        .footer-nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-nav ul li {
            margin-bottom: 0.65rem;
        }
        .footer-nav ul li a {
            font-size: 0.9rem;
            color: var(--mist-dim);
            letter-spacing: 0.03em;
            transition: all 0.3s var(--transition-smooth);
            position: relative;
        }
        .footer-nav ul li a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 1px;
            background: var(--gold);
            transition: width 0.3s var(--transition-smooth);
        }
        .footer-nav ul li a:hover {
            color: var(--gold);
        }
        .footer-nav ul li a:hover::after {
            width: 100%;
        }
        .footer-contact-item {
            font-size: 0.88rem;
            color: var(--mist-dim);
            margin-bottom: 0.6rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            letter-spacing: 0.03em;
        }
        .footer-contact-item i {
            color: var(--gold);
            font-size: 0.8rem;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
            padding: 1.3rem 0 1.5rem;
            font-size: 0.78rem;
            color: var(--mist-dim);
            letter-spacing: 0.03em;
        }
        .footer-bottom a {
            color: var(--mist-dim);
            transition: color 0.3s var(--transition-smooth);
        }
        .footer-bottom a:hover {
            color: var(--gold);
        }

        /* ============ ANIMATIONS ============ */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s var(--transition-smooth), transform 0.6s var(--transition-smooth);
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .fade-up-delay-1 { transition-delay: 0.1s; }
        .fade-up-delay-2 { transition-delay: 0.2s; }
        .fade-up-delay-3 { transition-delay: 0.3s; }
        @media (prefers-reduced-motion: reduce) {
            html { scroll-behavior: auto; }
            .fade-up, .h-card, .scene-card, .process-step .step-num, .btn-kaiyun, .btn-kaiyun-outline, .btn-kaiyun-nav {
                transition: none !important;
                animation: none !important;
                opacity: 1 !important;
                transform: none !important;
            }
            .h-card:hover .h-card-img img {
                transform: none !important;
            }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1199px) {
            .strategy-layout {
                grid-template-columns: 200px 1fr;
                gap: 2rem;
            }
            .h-card {
                grid-template-columns: 220px 1fr;
                gap: 1.25rem;
            }
        }
        @media (max-width: 991px) {
            .strategy-layout {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .strategy-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
                gap: 0.5rem;
                margin-bottom: 1rem;
            }
            .strategy-sidebar .sidebar-title {
                width: 100%;
                margin-bottom: 0.2rem;
            }
            .side-tag {
                padding: 0.45rem 0.85rem;
                font-size: 0.82rem;
            }
            .h-card {
                grid-template-columns: 200px 1fr;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem 0;
            }
            .stat-item:nth-child(3)::before {
                display: none;
            }
            .stat-item:nth-child(2)::before {
                display: block;
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 2rem 1rem;
            }
            .process-grid::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 767px) {
            :root {
                --section-pad-desktop: 64px;
            }
            .kaiyun-navbar {
                height: 60px;
            }
            .cat-hero {
                min-height: 34vh;
                padding: 3.5rem 0 2.5rem;
            }
            .cat-hero h1 {
                font-size: 1.8rem;
            }
            .cat-hero-desc {
                font-size: 0.85rem;
                padding: 0.6rem 0.9rem;
            }
            .strategy-layout {
                gap: 1.25rem;
            }
            .strategy-sidebar {
                gap: 0.4rem;
            }
            .side-tag {
                font-size: 0.78rem;
                padding: 0.4rem 0.7rem;
            }
            .h-card {
                grid-template-columns: 1fr;
                gap: 0;
                min-height: auto;
            }
            .h-card .h-card-img {
                min-height: 180px;
                max-height: 220px;
            }
            .h-card .h-card-body {
                padding: 1rem 1.2rem 1.2rem;
                gap: 0.45rem;
            }
            .h-card .h-card-title {
                font-size: 1.05rem;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                padding: 2rem 0;
                gap: 1.2rem 0;
            }
            .stat-item {
                padding: 0 0.8rem;
            }
            .stat-item + .stat-item::before {
                display: none;
            }
            .stat-number {
                font-size: 2rem;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .process-step .step-num {
                width: 64px;
                height: 64px;
                font-size: 1.1rem;
                margin-bottom: 0.7rem;
            }
            .kaiyun-pagination .page-btn {
                min-width: 34px;
                height: 34px;
                font-size: 0.78rem;
                padding: 0 0.5rem;
            }
            .cta-section {
                padding: 3.5rem 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .footer-brand {
                grid-column: auto;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 0.6rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .cat-hero h1 {
                font-size: 1.55rem;
            }
            .strategy-sidebar .sidebar-title {
                font-size: 0.7rem;
            }
            .side-tag {
                font-size: 0.75rem;
                padding: 0.35rem 0.6rem;
            }
            .h-card .h-card-img {
                min-height: 150px;
            }
            .h-card .h-card-summary {
                font-size: 0.82rem;
                -webkit-line-clamp: 3;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                padding: 1.5rem 0;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .stat-label {
                font-size: 0.75rem;
            }
            .kaiyun-pagination {
                gap: 0.3rem;
            }
            .kaiyun-pagination .page-btn {
                min-width: 30px;
                height: 30px;
                font-size: 0.72rem;
            }
        }

/* roulang page: category5 */
/* ============ roulang page: partner-portal ============ */
:root {
  --night: #0B0C0D;
  --night-soft: #121315;
  --night-card: #181A1C;
  --cloud: #F2F0E9;
  --mist: #C8CDD0;
  --mist-dim: #8F989E;
  --gold: #C49A4B;
  --gold-bright: #D9AC5F;
  --gold-dim: #8F6F37;
  --amber: #B8822F;
  --red-dark: #8C2F2A;
  --orange-dark: #B65F2B;
  --border-faint: rgba(242, 240, 233, 0.08);
  --border-light: rgba(242, 240, 233, 0.15);
  --border-mist: rgba(200, 205, 208, 0.28);
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 16px 40px rgba(0, 0, 0, 0.35);
  --shadow-card-hover: 0 0 0 1px rgba(196, 154, 75, 0.25), 0 24px 48px rgba(0, 0, 0, 0.45);
  --shadow-btn: 0 8px 24px rgba(196, 154, 75, 0.18);
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', serif;
  --font-sans: 'Noto Sans SC', 'Source Han Sans SC', '思源黑体', system-ui, sans-serif;
  --font-display: 'Oswald', 'Bebas Neue', 'Noto Sans SC', sans-serif;
  --transition-smooth: cubic-bezier(0.22, 0.61, 0.36, 1);
  --gutter-x: 2rem;
  --gutter-y: 3rem;
  --nav-height: 72px;
  --section-pad-desktop: 96px;
  --section-pad-mobile: 56px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
  background-color: var(--night);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s var(--transition-smooth), border-color 0.3s var(--transition-smooth), background-color 0.3s var(--transition-smooth);
}
a:hover {
  color: var(--gold);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}
button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}
button:focus, a:focus, input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.container {
  max-width: 1320px;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.section-pad {
  padding-top: var(--section-pad-desktop);
  padding-bottom: var(--section-pad-desktop);
}
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid rgba(196, 154, 75, 0.4);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.25rem;
  font-weight: 500;
}
.section-title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1.08;
  color: var(--cloud);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.section-subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--mist-dim);
  line-height: 1.7;
  max-width: 720px;
  margin-bottom: 2.5rem;
}

/* ============ NAVBAR ============ */
.kaiyun-navbar {
  position: sticky;
  top: 0;
  z-index: 1030;
  height: var(--nav-height);
  background: rgba(10, 11, 13, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--transition-smooth), background-color 0.4s var(--transition-smooth);
}
.kaiyun-navbar.scrolled {
  border-bottom-color: rgba(242, 240, 233, 0.08);
  background: rgba(10, 11, 13, 0.92);
}
.navbar-brand-logo {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  color: var(--cloud);
  white-space: nowrap;
}
.navbar-brand-logo span {
  color: var(--gold);
}
.navbar-brand-logo:hover {
  color: var(--cloud);
}
.navbar .nav-link {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--mist);
  padding: 0.5rem 0.9rem;
  position: relative;
  transition: color 0.3s var(--transition-smooth);
  white-space: nowrap;
}
.navbar .nav-link::after {
  content: '';
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.2rem;
  height: 1px;
  background-color: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--transition-smooth);
}
.navbar .nav-link:hover {
  color: var(--gold);
}
.navbar .nav-link:hover::after,
.navbar .nav-link.active::after {
  transform: scaleX(1);
}
.navbar .nav-link.active {
  color: var(--gold);
}
.lang-switch-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 32px;
  padding: 0 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(242, 240, 233, 0.18);
  color: var(--mist);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  transition: all 0.3s var(--transition-smooth);
  white-space: nowrap;
}
.lang-switch-pill:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(196, 154, 75, 0.06);
}
.lang-switch-pill .lang-active {
  color: var(--gold);
  font-weight: 600;
}
.btn-kaiyun-nav {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--gold);
  color: var(--night);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: all 0.3s var(--transition-smooth);
  white-space: nowrap;
}
.btn-kaiyun-nav:hover {
  background: var(--gold-bright);
  color: var(--night);
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn);
}
.navbar-toggler {
  border: 1px solid var(--border-light);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: transparent;
}
.navbar-toggler:focus {
  box-shadow: none;
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.navbar-toggler-icon {
  background-image: none;
  position: relative;
  width: 20px;
  height: 14px;
  display: inline-block;
}
.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--cloud);
  transition: all 0.35s var(--transition-smooth);
}
.navbar-toggler-icon::before {
  top: 0;
}
.navbar-toggler-icon::after {
  bottom: 0;
}
.navbar-toggler-icon {
  border-top: 2px solid var(--cloud);
  border-bottom: none;
  top: 6px;
  box-sizing: content-box;
}
.mobile-lang-wrapper {
  border-top: 1px solid var(--border-faint);
  padding-top: 1rem;
}

/* ============ HERO ============ */
.pp-hero {
  position: relative;
  min-height: 46vh;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  overflow: hidden;
  padding: 4rem 0 3.5rem;
}
.pp-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,12,13,0.72) 0%, rgba(11,12,13,0.85) 60%, var(--night) 100%);
  z-index: 1;
}
.pp-hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--night);
  z-index: 2;
}
.pp-hero::before {
  pointer-events: none;
}
.pp-hero .container {
  position: relative;
  z-index: 3;
}
.pp-hero-breadcrumb {
  font-size: 0.8rem;
  color: var(--mist-dim);
  margin-bottom: 1.5rem;
  letter-spacing: 0.06em;
}
.pp-hero-breadcrumb a {
  color: var(--mist-dim);
  transition: color 0.3s var(--transition-smooth);
}
.pp-hero-breadcrumb a:hover {
  color: var(--gold);
}
.pp-hero-breadcrumb .breadcrumb-sep {
  margin: 0 0.5rem;
  color: var(--mist-dim);
  opacity: 0.6;
}
.pp-hero-title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.05;
  color: var(--cloud);
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  text-shadow: 0 2px 24px rgba(0,0,0,0.5);
}
.pp-hero-title .gold-accent {
  color: var(--gold);
}
.pp-hero-desc {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--mist);
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 2rem;
}
.pp-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(196, 154, 75, 0.4);
  background: rgba(196, 154, 75, 0.08);
  color: var(--gold);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
}
.pp-hero-badge i {
  font-size: 0.8rem;
}
.btn-pp-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  background: var(--gold);
  color: var(--night);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  transition: all 0.3s var(--transition-smooth);
  border: none;
}
.btn-pp-primary:hover {
  background: var(--gold-bright);
  color: var(--night);
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn);
}
.btn-pp-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border-mist);
  color: var(--cloud);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  transition: all 0.3s var(--transition-smooth);
}
.btn-pp-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(196, 154, 75, 0.06);
  transform: translateY(-1px);
}
.pp-hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ============ VALUE SECTION ============ */
.pp-value-section {
  background: var(--night);
  position: relative;
}
.pp-value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
}
.pp-value-item {
  padding: 2rem 1.5rem;
  text-align: center;
  border-right: 1px solid var(--border-faint);
  transition: background-color 0.3s var(--transition-smooth);
}
.pp-value-item:last-child {
  border-right: none;
}
.pp-value-item:hover {
  background: rgba(196, 154, 75, 0.04);
}
.pp-value-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}
.pp-value-unit {
  font-size: 0.9rem;
  color: var(--mist-dim);
  margin-bottom: 0.5rem;
}
.pp-value-label {
  font-size: 0.85rem;
  color: var(--mist);
  line-height: 1.5;
  max-width: 180px;
  margin: 0 auto;
}

/* ============ SCENARIO SECTION ============ */
.pp-scenario-section {
  background: var(--night-soft);
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
}
.pp-scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.pp-scenario-card {
  background: var(--night-card);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  transition: all 0.3s var(--transition-smooth);
  position: relative;
  overflow: hidden;
}
.pp-scenario-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--gold);
  opacity: 0;
  transition: opacity 0.3s var(--transition-smooth);
}
.pp-scenario-card:hover {
  border-color: rgba(196, 154, 75, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.pp-scenario-card:hover::before {
  opacity: 1;
}
.pp-scenario-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(196, 154, 75, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
}
.pp-scenario-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cloud);
  margin-bottom: 0.75rem;
}
.pp-scenario-card p {
  font-size: 0.95rem;
  color: var(--mist-dim);
  line-height: 1.7;
  margin-bottom: 0;
}
.pp-scenario-tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-mist);
  color: var(--mist);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

/* ============ PROCESS SECTION ============ */
.pp-process-section {
  background: var(--night);
}
.pp-process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.pp-process-step {
  padding: 2.5rem 1.75rem;
  position: relative;
  border-right: 1px solid var(--border-faint);
  transition: all 0.3s var(--transition-smooth);
}
.pp-process-step:last-child {
  border-right: none;
}
.pp-process-step::before {
  content: '';
  position: absolute;
  top: 2.5rem;
  left: 3.5rem;
  right: 0;
  height: 1px;
  border-top: 1px dashed rgba(200, 205, 208, 0.25);
  z-index: 1;
}
.pp-process-step:last-child::before {
  display: none;
}
.pp-process-step:hover {
  background: rgba(196, 154, 75, 0.03);
}
.pp-process-step .pp-step-num {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  position: relative;
  z-index: 2;
  display: inline-block;
  background: var(--night);
  padding-right: 0.75rem;
}
.pp-process-step .pp-step-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cloud);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}
.pp-process-step .pp-step-desc {
  font-size: 0.9rem;
  color: var(--mist-dim);
  line-height: 1.6;
  margin-bottom: 0;
}

/* ============ RESOURCE CARDS (非等宽3列) ============ */
.pp-resource-section {
  background: var(--night-soft);
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
}
.pp-resource-grid {
  display: grid;
  grid-template-columns: 1fr 1.8fr 1fr;
  gap: 1.5rem;
  grid-auto-rows: auto;
}
.pp-resource-card {
  background: var(--night-card);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.35s var(--transition-smooth);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.pp-resource-card:hover {
  border-color: rgba(196, 154, 75, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.pp-resource-card .pp-resource-img {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}
.pp-resource-card .pp-resource-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: transform 0.5s var(--transition-smooth);
}
.pp-resource-card:hover .pp-resource-img img {
  transform: scale(1.04);
}
.pp-resource-card .pp-resource-body {
  padding: 1.25rem 1.25rem 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.pp-resource-tag {
  display: inline-block;
  font-size: 0.7rem;
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(196, 154, 75, 0.35);
  color: var(--gold);
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
  align-self: flex-start;
}
.pp-resource-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cloud);
  margin-bottom: 0.5rem;
  line-height: 1.35;
}
.pp-resource-card .pp-resource-desc {
  font-size: 0.85rem;
  color: var(--mist-dim);
  line-height: 1.6;
  margin-bottom: 1rem;
  flex-grow: 1;
}
.pp-resource-meta {
  font-size: 0.75rem;
  color: var(--mist-dim);
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-faint);
}
.pp-resource-meta i {
  font-size: 0.7rem;
  color: var(--gold);
}
/* 中间列卡片稍大 */
.pp-resource-card--wide .pp-resource-img {
  aspect-ratio: 16/9;
}
.pp-resource-card--wide h3 {
  font-size: 1.25rem;
}
.pp-resource-card--wide .pp-resource-desc {
  font-size: 0.9rem;
}

/* ============ TESTIMONIALS ============ */
.pp-testimonial-section {
  background: var(--night);
}
.pp-testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.pp-testimonial-card {
  background: var(--night-card);
  border: 1px solid var(--border-faint);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: all 0.3s var(--transition-smooth);
}
.pp-testimonial-card:hover {
  border-color: rgba(196, 154, 75, 0.25);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.pp-testimonial-quote {
  font-size: 0.9rem;
  color: var(--mist);
  line-height: 1.75;
  margin-bottom: 1.25rem;
  position: relative;
  padding-left: 1rem;
  border-left: 2px solid var(--gold);
}
.pp-testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.pp-testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(196, 154, 75, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.pp-testimonial-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--cloud);
}
.pp-testimonial-role {
  font-size: 0.75rem;
  color: var(--mist-dim);
}

/* ============ FAQ ============ */
.pp-faq-section {
  background: var(--night-soft);
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
}
.pp-faq-accordion {
  max-width: 880px;
  margin: 0 auto;
}
.pp-faq-accordion .accordion-item {
  background: var(--night-card);
  border: none;
  border-bottom: 1px solid var(--border-faint);
  border-radius: 0;
  margin-bottom: 0;
  transition: background-color 0.3s var(--transition-smooth);
}
.pp-faq-accordion .accordion-item:first-child {
  border-top: 1px solid var(--border-faint);
}
.pp-faq-accordion .accordion-item.active-faq {
  border-left: 3px solid var(--gold);
}
.pp-faq-accordion .accordion-header {
  margin: 0;
}
.pp-faq-accordion .accordion-button {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 1.25rem 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--cloud);
  box-shadow: none;
  transition: color 0.3s var(--transition-smooth), background-color 0.3s var(--transition-smooth);
  letter-spacing: 0.02em;
}
.pp-faq-accordion .accordion-button:not(.collapsed) {
  color: var(--gold);
  background: rgba(196, 154, 75, 0.04);
  box-shadow: none;
}
.pp-faq-accordion .accordion-button::after {
  background-image: none;
  content: '\f107';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--gold);
  width: auto;
  height: auto;
  transition: transform 0.35s var(--transition-smooth);
}
.pp-faq-accordion .accordion-button:not(.collapsed)::after {
  transform: rotate(180deg);
  color: var(--gold-bright);
}
.pp-faq-accordion .accordion-button:focus {
  outline: none;
  box-shadow: none;
}
.pp-faq-accordion .accordion-body {
  padding: 0 1rem 1.5rem;
  font-size: 0.95rem;
  color: var(--mist);
  line-height: 1.75;
  letter-spacing: 0.01em;
}

/* ============ CTA ============ */
.pp-cta-section {
  background-image: url('/assets/images/backpic/back-3.webp');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  position: relative;
  padding-top: var(--section-pad-desktop);
  padding-bottom: var(--section-pad-desktop);
}
.pp-cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(11, 12, 13, 0.82);
  z-index: 1;
}
.pp-cta-section .container {
  position: relative;
  z-index: 2;
}
.pp-cta-card {
  background: rgba(18, 19, 21, 0.85);
  border: 1px solid rgba(196, 154, 75, 0.25);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.pp-cta-card h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--cloud);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.pp-cta-card p {
  font-size: 1rem;
  color: var(--mist);
  line-height: 1.7;
  margin-bottom: 2rem;
}
.pp-cta-form {
  display: flex;
  gap: 0.75rem;
  max-width: 520px;
  margin: 0 auto;
  flex-wrap: wrap;
}
.pp-cta-form input {
  flex: 1;
  min-width: 220px;
  height: 48px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(242, 240, 233, 0.18);
  border-radius: var(--radius-sm);
  color: var(--cloud);
  padding: 0 1rem;
  font-size: 0.95rem;
  transition: border-color 0.3s var(--transition-smooth), box-shadow 0.3s var(--transition-smooth);
}
.pp-cta-form input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}
.pp-cta-form input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(196, 154, 75, 0.15);
  outline: none;
}
.pp-cta-form .btn-pp-primary {
  height: 48px;
  padding: 0 1.5rem;
  white-space: nowrap;
}
.pp-cta-note {
  font-size: 0.8rem;
  color: var(--mist-dim);
  margin-top: 1rem;
  letter-spacing: 0.03em;
}

/* ============ FOOTER ============ */
.kaiyun-footer {
  background: var(--night);
  border-top: 1px solid var(--border-faint);
  padding-top: 4rem;
  padding-bottom: 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}
.footer-logo {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--cloud);
  letter-spacing: -0.01em;
  display: inline-block;
  margin-bottom: 1rem;
}
.footer-logo span {
  color: var(--gold);
}
.footer-logo:hover {
  color: var(--cloud);
}
.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--mist-dim);
  line-height: 1.7;
  max-width: 360px;
}
.footer-nav-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--cloud);
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
}
.footer-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-nav ul li {
  margin-bottom: 0.6rem;
}
.footer-nav ul li a {
  font-size: 0.9rem;
  color: var(--mist);
  transition: color 0.3s var(--transition-smooth), padding-left 0.3s var(--transition-smooth);
}
.footer-nav ul li a:hover {
  color: var(--gold);
  padding-left: 4px;
}
.footer-contact-item {
  font-size: 0.85rem;
  color: var(--mist);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-contact-item i {
  color: var(--gold);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-faint);
  font-size: 0.75rem;
  color: var(--mist-dim);
}
.footer-bottom a {
  color: var(--mist-dim);
  transition: color 0.3s var(--transition-smooth);
}
.footer-bottom a:hover {
  color: var(--gold);
}

/* ============ ANIMATIONS ============ */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--transition-smooth), transform 0.7s var(--transition-smooth);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .pp-resource-card:hover .pp-resource-img img,
  .pp-scenario-card:hover,
  .pp-resource-card:hover {
    transform: none;
  }
  .pp-value-number,
  .pp-process-step:hover {
    transition: none;
  }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1200px) {
  .pp-resource-grid {
    grid-template-columns: 1fr 1.5fr 1fr;
    gap: 1rem;
  }
  .pp-value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pp-value-item:nth-child(2) {
    border-right: none;
  }
  .pp-value-item:nth-child(1),
  .pp-value-item:nth-child(2) {
    border-bottom: 1px solid var(--border-faint);
  }
}

@media (max-width: 992px) {
  .pp-resource-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
  .pp-resource-card--wide {
    grid-column: span 2;
  }
  .pp-scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pp-process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pp-process-step {
    border-right: 1px solid var(--border-faint);
    border-bottom: 1px solid var(--border-faint);
  }
  .pp-process-step:nth-child(2) {
    border-right: none;
  }
  .pp-process-step:nth-child(3),
  .pp-process-step:nth-child(4) {
    border-bottom: none;
  }
  .pp-process-step::before {
    display: none;
  }
  .pp-testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad-desktop: 64px;
  }
  .pp-hero {
    min-height: 40vh;
    padding: 3rem 0 2.5rem;
  }
  .pp-value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pp-value-item {
    padding: 1.5rem 1rem;
  }
  .pp-scenario-grid {
    grid-template-columns: 1fr;
  }
  .pp-process-grid {
    grid-template-columns: 1fr;
  }
  .pp-process-step {
    border-right: none;
    border-bottom: 1px solid var(--border-faint);
  }
  .pp-process-step:last-child {
    border-bottom: none;
  }
  .pp-testimonial-grid {
    grid-template-columns: 1fr;
  }
  .pp-resource-grid {
    grid-template-columns: 1fr;
  }
  .pp-resource-card--wide {
    grid-column: span 1;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .pp-cta-card {
    padding: 2rem 1.5rem;
  }
  .pp-cta-form {
    flex-direction: column;
  }
  .pp-cta-form input {
    min-width: 100%;
  }
}

@media (max-width: 520px) {
  .pp-value-grid {
    grid-template-columns: 1fr;
  }
  .pp-value-item {
    border-right: none;
    border-bottom: 1px solid var(--border-faint);
  }
  .pp-value-item:last-child {
    border-bottom: none;
  }
  .pp-value-item:nth-child(1),
  .pp-value-item:nth-child(2) {
    border-bottom: 1px solid var(--border-faint);
  }
  .pp-hero-title {
    font-size: 1.75rem;
  }
  .pp-hero-desc {
    font-size: 0.95rem;
  }
  .btn-pp-primary,
  .btn-pp-outline {
    padding: 0.7rem 1.2rem;
    font-size: 0.85rem;
  }
  .section-title {
    font-size: 1.6rem;
  }
}