/* roulang page: index */
:root {
            --color-primary: #1c1d21;
            --color-accent: #b8925a;
            --color-accent-light: #d4b87a;
            --color-accent-dark: #8b6d3c;
            --color-bg: #fafaf7;
            --color-bg-alt: #f3f2ed;
            --color-surface: #ffffff;
            --color-text: #1a1a1c;
            --color-text-soft: #5c5c62;
            --color-text-muted: #8c8c91;
            --color-border: #e4e3de;
            --color-border-light: #efeee9;
            --color-success: #3d6b4f;
            --color-tag-bg: #f0ede4;
            --color-tag-text: #6b5e3f;
            --radius-xs: 4px;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.03);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.10), 0 8px 20px rgba(0, 0, 0, 0.05);
            --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-spring: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-display: 'Playfair Display', 'Noto Serif SC', 'STSong', 'Georgia', serif;
            --max-width: 1280px;
            --nav-height: 64px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-xs);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        input {
            font-family: inherit;
        }
        input:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ========== NAVBAR ========== */
        .navbar-kaiyun {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }
        .navbar-kaiyun.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(255, 255, 255, 0.95);
        }
        .navbar-kaiyun .navbar-inner {
            display: flex;
            align-items: center;
            width: 100%;
            gap: 20px;
        }
        .navbar-brand-kaiyun {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: var(--color-primary);
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .navbar-brand-kaiyun:hover {
            color: var(--color-accent);
        }
        .navbar-brand-kaiyun .brand-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-accent);
            margin-left: 2px;
            vertical-align: middle;
            position: relative;
            top: -8px;
        }
        .nav-links-kaiyun {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links-kaiyun .nav-item-kaiyun {
            position: relative;
        }
        .nav-links-kaiyun .nav-link-kaiyun {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-soft);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .nav-links-kaiyun .nav-link-kaiyun:hover {
            color: var(--color-accent);
            background: rgba(184, 146, 90, 0.06);
        }
        .nav-links-kaiyun .nav-link-kaiyun.active {
            color: var(--color-accent-dark);
            font-weight: 600;
            background: rgba(184, 146, 90, 0.1);
        }
        .nav-links-kaiyun .nav-link-kaiyun .nav-indicator {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--color-accent);
            opacity: 0;
            transform: scale(0);
            transition: all var(--transition-fast);
        }
        .nav-links-kaiyun .nav-link-kaiyun.active .nav-indicator {
            opacity: 1;
            transform: scale(1);
        }
        .navbar-right-kaiyun {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .search-box-kaiyun {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-box-kaiyun input {
            width: 200px;
            padding: 9px 36px 9px 14px;
            border: 1.5px solid var(--color-border);
            border-radius: var(--radius-xl);
            font-size: 0.85rem;
            background: var(--color-bg-alt);
            color: var(--color-text);
            transition: all var(--transition-smooth);
            outline: none;
        }
        .search-box-kaiyun input:focus {
            border-color: var(--color-accent);
            background: var(--color-surface);
            box-shadow: 0 0 0 4px rgba(184, 146, 90, 0.08);
            width: 240px;
        }
        .search-box-kaiyun .search-icon {
            position: absolute;
            right: 12px;
            color: var(--color-text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .search-box-kaiyun .search-shortcut {
            position: absolute;
            right: 32px;
            font-size: 0.7rem;
            color: var(--color-text-muted);
            background: var(--color-border-light);
            padding: 2px 7px;
            border-radius: 4px;
            pointer-events: none;
            letter-spacing: 0.04em;
            font-weight: 500;
        }
        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 0.88rem;
            letter-spacing: 0.02em;
            background: var(--color-primary);
            color: #fff;
            border: none;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-cta-nav:hover {
            background: var(--color-accent);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-cta-nav:active {
            transform: translateY(0);
        }
        .navbar-toggler-kaiyun {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            color: var(--color-text);
            font-size: 1.3rem;
            cursor: pointer;
        }
        @media (max-width: 1024px) {
            .nav-links-kaiyun {
                gap: 2px;
            }
            .nav-links-kaiyun .nav-link-kaiyun {
                padding: 8px 10px;
                font-size: 0.82rem;
            }
            .search-box-kaiyun input {
                width: 150px;
            }
            .search-box-kaiyun input:focus {
                width: 180px;
            }
            .search-box-kaiyun .search-shortcut {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .navbar-toggler-kaiyun {
                display: block;
            }
            .nav-links-kaiyun {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: #fff;
                padding: 16px;
                gap: 2px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: all var(--transition-spring);
                z-index: 1040;
                align-items: stretch;
            }
            .nav-links-kaiyun.show {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-links-kaiyun .nav-link-kaiyun {
                padding: 12px 16px;
                font-size: 0.9rem;
                border-radius: var(--radius-sm);
                justify-content: flex-start;
            }
            .search-box-kaiyun input {
                width: 130px;
            }
            .search-box-kaiyun input:focus {
                width: 150px;
            }
            .btn-cta-nav {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 520px) {
            .navbar-brand-kaiyun {
                font-size: 1.2rem;
            }
            .search-box-kaiyun {
                display: none;
            }
            .btn-cta-nav {
                padding: 7px 12px;
                font-size: 0.75rem;
            }
        }

        /* ========== HERO ========== */
        .hero-kaiyun {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #1a1d24 0%, #252830 40%, #1f2229 100%);
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero-kaiyun::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 29, 36, 0.55) 0%, rgba(26, 29, 36, 0.75) 60%, rgba(26, 29, 36, 0.9) 100%);
            z-index: 1;
        }
        .hero-kaiyun .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0 70px;
            color: #fff;
        }
        .hero-kaiyun .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-accent-light);
            margin-bottom: 18px;
            font-weight: 500;
        }
        .hero-kaiyun .hero-eyebrow::before {
            content: '';
            width: 28px;
            height: 1.5px;
            background: var(--color-accent-light);
        }
        .hero-kaiyun h1 {
            font-family: var(--font-display);
            font-size: 3.2rem;
            font-weight: 600;
            line-height: 1.2;
            letter-spacing: 0.02em;
            margin-bottom: 18px;
            max-width: 680px;
        }
        .hero-kaiyun h1 .highlight {
            color: var(--color-accent-light);
            position: relative;
        }
        .hero-kaiyun .hero-desc {
            font-size: 1.08rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.78);
            max-width: 540px;
            margin-bottom: 32px;
            font-weight: 400;
        }
        .hero-kaiyun .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            background: var(--color-accent);
            color: #fff;
            border: none;
            transition: all var(--transition-smooth);
        }
        .btn-hero-primary:hover {
            background: var(--color-accent-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(184, 146, 90, 0.35);
        }
        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.45);
            transition: all var(--transition-smooth);
        }
        .btn-hero-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats-row {
            display: flex;
            gap: 40px;
            margin-top: 50px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-item .stat-num {
            font-family: var(--font-display);
            font-size: 2.1rem;
            font-weight: 600;
            color: #fff;
            line-height: 1;
        }
        .hero-stat-item .stat-label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
            letter-spacing: 0.04em;
        }
        @media (max-width: 768px) {
            .hero-kaiyun {
                min-height: 480px;
            }
            .hero-kaiyun h1 {
                font-size: 2.2rem;
                max-width: 100%;
            }
            .hero-kaiyun .hero-desc {
                font-size: 0.95rem;
                max-width: 100%;
            }
            .hero-stats-row {
                gap: 24px;
                margin-top: 32px;
            }
            .hero-stat-item .stat-num {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .hero-kaiyun h1 {
                font-size: 1.7rem;
            }
            .hero-kaiyun .hero-desc {
                font-size: 0.88rem;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                padding: 12px 20px;
                font-size: 0.85rem;
            }
        }

        /* ========== SECTIONS ========== */
        .section-kaiyun {
            padding: 70px 0;
        }
        .section-kaiyun.section-alt {
            background: var(--color-bg-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-eyebrow {
            display: inline-block;
            font-size: 0.78rem;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--color-accent);
            font-weight: 600;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-family: var(--font-display);
            font-size: 2.2rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            color: var(--color-primary);
            margin-bottom: 10px;
        }
        .section-header .section-subtitle {
            font-size: 0.95rem;
            color: var(--color-text-soft);
            max-width: 520px;
            margin: 0 auto;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .section-kaiyun {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ========== CARDS ========== */
        .card-brand {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card-brand:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
            border-color: transparent;
        }
        .card-brand .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4/3;
            background: var(--color-bg-alt);
        }
        .card-brand .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-spring);
        }
        .card-brand:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .card-brand .card-body-custom {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-brand .card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-tag-text);
            background: var(--color-tag-bg);
            padding: 4px 10px;
            border-radius: var(--radius-xs);
            margin-bottom: 10px;
            width: fit-content;
        }
        .card-brand h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 6px;
            letter-spacing: 0.01em;
        }
        .card-brand p {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            line-height: 1.55;
            margin: 0;
        }
        .card-brand .card-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: auto;
            padding-top: 14px;
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--color-accent-dark);
            transition: gap var(--transition-fast);
        }
        .card-brand:hover .card-link {
            gap: 10px;
        }

        /* ========== DATA PANEL ========== */
        .data-panel-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .data-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            text-align: center;
        }
        .data-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .data-card .data-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: rgba(184, 146, 90, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.3rem;
            color: var(--color-accent);
        }
        .data-card .data-num {
            font-family: var(--font-display);
            font-size: 2.4rem;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1;
        }
        .data-card .data-label {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            margin-top: 6px;
        }
        .data-card.data-progress .progress-bar-custom {
            height: 6px;
            border-radius: 3px;
            background: var(--color-border-light);
            margin-top: 12px;
            overflow: hidden;
        }
        .data-card.data-progress .progress-fill {
            height: 100%;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
            transition: width var(--transition-spring);
        }
        .data-card.data-tags .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            justify-content: center;
            margin-top: 10px;
        }
        .data-card.data-tags .tag-pill {
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: var(--radius-xl);
            background: var(--color-tag-bg);
            color: var(--color-tag-text);
            font-weight: 500;
        }
        .data-card.data-rank .rank-list {
            list-style: none;
            padding: 0;
            margin: 10px 0 0;
            text-align: left;
        }
        .data-card.data-rank .rank-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 7px 0;
            border-bottom: 1px solid var(--color-border-light);
            font-size: 0.85rem;
        }
        .data-card.data-rank .rank-item:last-child {
            border-bottom: none;
        }
        .data-card.data-rank .rank-num {
            font-weight: 700;
            color: var(--color-accent);
            min-width: 22px;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .data-panel-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .data-panel-grid {
                grid-template-columns: 1fr;
            }
            .data-card .data-num {
                font-size: 1.8rem;
            }
        }

        /* ========== NEWS CARDS ========== */
        .news-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .news-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .news-card .news-img {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--color-bg-alt);
        }
        .news-card .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-spring);
        }
        .news-card:hover .news-img img {
            transform: scale(1.05);
        }
        .news-card .news-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-date {
            font-size: 0.75rem;
            color: var(--color-text-muted);
            margin-bottom: 6px;
        }
        .news-card h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-card p {
            font-size: 0.84rem;
            color: var(--color-text-soft);
            line-height: 1.5;
            margin-bottom: 12px;
        }
        .news-card .news-link {
            margin-top: auto;
            font-weight: 600;
            font-size: 0.82rem;
            color: var(--color-accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        @media (max-width: 1024px) {
            .news-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 600px) {
            .news-list-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FEATURE BLOCK ========== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .feature-block.reverse {
            direction: rtl;
        }
        .feature-block.reverse>* {
            direction: ltr;
        }
        .feature-block .feature-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            aspect-ratio: 5/4;
            background: var(--color-bg-alt);
        }
        .feature-block .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-spring);
        }
        .feature-block .feature-img:hover img {
            transform: scale(1.04);
        }
        .feature-block .feature-text h3 {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 14px;
        }
        .feature-block .feature-text p {
            font-size: 0.95rem;
            color: var(--color-text-soft);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .feature-block .feature-text .feature-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .feature-block .feature-text .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--color-text-soft);
        }
        .feature-block .feature-text .feature-list li i {
            color: var(--color-accent);
            margin-top: 3px;
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            .feature-block {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .feature-block .feature-text h3 {
                font-size: 1.4rem;
            }
        }

        /* ========== FAQ ACCORDION ========== */
        .accordion-kaiyun .accordion-item {
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md) !important;
            margin-bottom: 10px;
            overflow: hidden;
            background: var(--color-surface);
            transition: all var(--transition-fast);
        }
        .accordion-kaiyun .accordion-item:hover {
            border-color: var(--color-border);
        }
        .accordion-kaiyun .accordion-button {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-primary);
            background: transparent;
            box-shadow: none !important;
            padding: 18px 22px;
            border-radius: var(--radius-md) !important;
            transition: all var(--transition-fast);
        }
        .accordion-kaiyun .accordion-button:not(.collapsed) {
            color: var(--color-accent-dark);
            background: rgba(184, 146, 90, 0.04);
        }
        .accordion-kaiyun .accordion-button::after {
            filter: brightness(0.6);
            transition: transform var(--transition-smooth);
        }
        .accordion-kaiyun .accordion-body {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section-kaiyun {
            background: var(--color-primary);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section-kaiyun::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(184, 146, 90, 0.2);
            pointer-events: none;
        }
        .cta-section-kaiyun h2 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 600;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-section-kaiyun p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 500px;
            margin: 0 auto 24px;
            position: relative;
            z-index: 1;
            line-height: 1.6;
        }
        .cta-section-kaiyun .btn-cta-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 15px 32px;
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            background: var(--color-accent);
            color: #fff;
            border: none;
            transition: all var(--transition-smooth);
            position: relative;
            z-index: 1;
        }
        .cta-section-kaiyun .btn-cta-lg:hover {
            background: var(--color-accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(184, 146, 90, 0.4);
        }
        @media (max-width: 768px) {
            .cta-section-kaiyun {
                padding: 40px 24px;
            }
            .cta-section-kaiyun h2 {
                font-size: 1.5rem;
            }
        }

        /* ========== FOOTER ========== */
        .footer-kaiyun {
            background: #1a1d22;
            color: rgba(255, 255, 255, 0.7);
            padding: 50px 0 28px;
            font-size: 0.88rem;
            line-height: 1.7;
        }
        .footer-kaiyun .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-kaiyun .footer-brand {
            font-family: var(--font-display);
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.03em;
            margin-bottom: 10px;
        }
        .footer-kaiyun .footer-desc {
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 280px;
        }
        .footer-kaiyun h5 {
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-kaiyun ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 7px;
        }
        .footer-kaiyun ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
            font-size: 0.84rem;
        }
        .footer-kaiyun ul li a:hover {
            color: var(--color-accent-light);
        }
        .footer-kaiyun .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.4);
        }
        @media (max-width: 768px) {
            .footer-kaiyun .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-kaiyun .footer-grid> :first-child {
                grid-column: 1/-1;
            }
        }
        @media (max-width: 520px) {
            .footer-kaiyun .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
        }

        /* ========== UTILITIES ========== */
        .text-accent {
            color: var(--color-accent) !important;
        }
        .bg-surface {
            background: var(--color-surface);
        }
        .radius-lg {
            border-radius: var(--radius-lg);
        }
        .shadow-hover {
            transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
        }
        .shadow-hover:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .hide-mobile {
                display: none !important;
            }
        }
        @media (min-width: 769px) {
            .hide-desktop {
                display: none !important;
            }
        }

/* roulang page: category1 */
:root {
            --brand-primary: #1a1d28;
            --brand-accent: #c8a87c;
            --brand-accent-soft: #d9c5a0;
            --brand-bg: #faf8f5;
            --brand-surface: #ffffff;
            --brand-text: #2c2c2e;
            --brand-text-soft: #6b6b70;
            --brand-text-light: #9a9a9f;
            --brand-border: #e8e5df;
            --brand-border-light: #f0ede8;
            --brand-shadow-sm: 0 1px 3px rgba(28, 28, 30, 0.06);
            --brand-shadow-md: 0 4px 16px rgba(28, 28, 30, 0.08);
            --brand-shadow-lg: 0 12px 40px rgba(28, 28, 30, 0.12);
            --brand-shadow-xl: 0 20px 60px rgba(28, 28, 30, 0.16);
            --brand-radius-sm: 8px;
            --brand-radius-md: 12px;
            --brand-radius-lg: 20px;
            --brand-radius-xl: 28px;
            --brand-transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --brand-font-heading: 'Georgia', 'Times New Roman', 'Noto Serif SC', 'STSong', serif;
            --brand-font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --brand-nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--brand-font-body);
            background-color: var(--brand-bg);
            color: var(--brand-text);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--brand-transition);
        }
        a:hover {
            color: var(--brand-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding: 0 18px;
            }
        }

        /* ========== NAVBAR ========== */
        .navbar-kaiyun {
            position: sticky;
            top: 0;
            z-index: 1100;
            background: rgba(250, 248, 245, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--brand-border-light);
            height: var(--brand-nav-height);
            display: flex;
            align-items: center;
            transition: background var(--brand-transition), box-shadow var(--brand-transition);
        }
        .navbar-kaiyun.scrolled {
            box-shadow: var(--brand-shadow-md);
            background: rgba(250, 248, 245, 0.96);
        }
        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }
        .navbar-brand-kaiyun {
            font-family: var(--brand-font-heading);
            font-size: 1.45rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            color: var(--brand-primary);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--brand-transition);
        }
        .navbar-brand-kaiyun:hover {
            color: var(--brand-accent);
        }
        .brand-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--brand-accent);
            margin-left: 2px;
            animation: dotPulse 2.4s ease-in-out infinite;
        }
        @keyframes dotPulse {
            0%,
            100% {
                transform: scale(1);
                opacity: 0.8;
            }
            50% {
                transform: scale(1.7);
                opacity: 1;
            }
        }
        .nav-links-kaiyun {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
        }
        .nav-item-kaiyun {
            position: relative;
        }
        .nav-link-kaiyun {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 16px;
            border-radius: 24px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--brand-text-soft);
            transition: all var(--brand-transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-link-kaiyun:hover {
            color: var(--brand-primary);
            background: rgba(200, 168, 124, 0.07);
        }
        .nav-link-kaiyun.active {
            color: var(--brand-primary);
            font-weight: 600;
            background: rgba(200, 168, 124, 0.13);
        }
        .nav-link-kaiyun.active .nav-indicator {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand-accent);
            display: inline-block;
        }
        .nav-indicator {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: transparent;
            display: inline-block;
            transition: background var(--brand-transition);
        }
        .navbar-right-kaiyun {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .search-box-kaiyun {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-box-kaiyun input {
            width: 200px;
            padding: 9px 38px 9px 16px;
            border: 1px solid var(--brand-border);
            border-radius: 24px;
            font-size: 0.88rem;
            color: var(--brand-text);
            background: var(--brand-surface);
            transition: all var(--brand-transition);
            outline: none;
        }
        .search-box-kaiyun input:focus {
            border-color: var(--brand-accent);
            box-shadow: 0 0 0 3px rgba(200, 168, 124, 0.12);
            width: 230px;
        }
        .search-box-kaiyun input::placeholder {
            color: var(--brand-text-light);
        }
        .search-shortcut {
            position: absolute;
            right: 36px;
            font-size: 0.7rem;
            color: var(--brand-text-light);
            pointer-events: none;
            background: var(--brand-border-light);
            padding: 2px 7px;
            border-radius: 4px;
            letter-spacing: 0.03em;
        }
        .search-icon {
            position: absolute;
            right: 12px;
            color: var(--brand-text-soft);
            pointer-events: none;
            font-size: 0.85rem;
        }
        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: var(--brand-primary);
            transition: all var(--brand-transition);
            white-space: nowrap;
            letter-spacing: 0.02em;
            border: none;
        }
        .btn-cta-nav:hover {
            background: #2a2d3a;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--brand-shadow-md);
        }
        .navbar-toggler-kaiyun {
            display: none;
            font-size: 1.3rem;
            color: var(--brand-primary);
            padding: 8px;
            border-radius: 8px;
            transition: background var(--brand-transition);
        }
        .navbar-toggler-kaiyun:hover {
            background: rgba(200, 168, 124, 0.1);
        }

        @media (max-width: 1024px) {
            .hide-mobile {
                display: none !important;
            }
            .hide-desktop {
                display: block !important;
            }
            .navbar-toggler-kaiyun {
                display: block;
            }
            .nav-links-kaiyun {
                position: fixed;
                top: var(--brand-nav-height);
                left: 0;
                right: 0;
                background: var(--brand-surface);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--brand-border);
                box-shadow: var(--brand-shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--brand-transition);
                z-index: 1099;
            }
            .nav-links-kaiyun.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link-kaiyun {
                border-radius: 10px;
                padding: 12px 16px;
                font-size: 0.95rem;
            }
            .search-box-kaiyun input {
                width: 160px;
            }
            .btn-cta-nav {
                padding: 8px 16px;
                font-size: 0.84rem;
            }
        }
        @media (min-width: 1025px) {
            .hide-desktop {
                display: none !important;
            }
        }
        @media (max-width: 520px) {
            .navbar-brand-kaiyun {
                font-size: 1.2rem;
            }
            .btn-cta-nav {
                padding: 7px 13px;
                font-size: 0.78rem;
            }
            .search-box-kaiyun input {
                width: 120px;
                font-size: 0.8rem;
            }
            .navbar-right-kaiyun {
                gap: 8px;
            }
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            background: url('assets/images/backpic/back-1.webp') center/cover no-repeat;
            background-position: center 35%;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 29, 40, 0.55) 0%, rgba(26, 29, 40, 0.7) 100%);
            z-index: 1;
        }
        .page-banner-content {
            position: relative;
            z-index: 2;
            padding: 60px 0;
        }
        .page-banner-content .banner-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 20px;
            background: rgba(200, 168, 124, 0.2);
            color: var(--brand-accent-soft);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
            border: 1px solid rgba(200, 168, 124, 0.3);
        }
        .page-banner-content h1 {
            font-family: var(--brand-font-heading);
            font-size: 2.8rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.03em;
            margin-bottom: 12px;
        }
        .page-banner-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 580px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .page-banner {
                min-height: 260px;
            }
            .page-banner-content h1 {
                font-size: 2rem;
            }
            .page-banner-content p {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .page-banner {
                min-height: 220px;
            }
            .page-banner-content h1 {
                font-size: 1.6rem;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section-kaiyun {
            padding: 70px 0;
        }
        .section-kaiyun.section-alt {
            background: var(--brand-surface);
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--brand-accent);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-title {
            font-family: var(--brand-font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--brand-primary);
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--brand-text-soft);
            max-width: 600px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-kaiyun {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.55rem;
            }
        }

        /* ========== BRAND CARDS GRID ========== */
        .brand-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 36px;
        }
        .brand-card-kaiyun {
            background: var(--brand-surface);
            border-radius: var(--brand-radius-lg);
            overflow: hidden;
            border: 1px solid var(--brand-border-light);
            transition: all var(--brand-transition);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .brand-card-kaiyun:hover {
            transform: translateY(-6px);
            box-shadow: var(--brand-shadow-lg);
            border-color: var(--brand-accent-soft);
        }
        .brand-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }
        .brand-card-kaiyun:hover .brand-card-img {
            transform: scale(1.04);
        }
        .brand-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .brand-card-tag {
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--brand-accent);
            text-transform: uppercase;
        }
        .brand-card-title {
            font-family: var(--brand-font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--brand-primary);
            letter-spacing: 0.02em;
        }
        .brand-card-desc {
            font-size: 0.88rem;
            color: var(--brand-text-soft);
            line-height: 1.6;
            flex: 1;
        }
        .brand-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--brand-primary);
            margin-top: 4px;
            transition: gap var(--brand-transition);
        }
        .brand-card-link i {
            font-size: 0.7rem;
            transition: transform var(--brand-transition);
        }
        .brand-card-kaiyun:hover .brand-card-link {
            gap: 10px;
            color: var(--brand-accent);
        }
        .brand-card-kaiyun:hover .brand-card-link i {
            transform: translateX(3px);
        }
        @media (max-width: 1024px) {
            .brand-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .brand-card-img {
                height: 180px;
            }
        }
        @media (max-width: 520px) {
            .brand-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .brand-card-img {
                height: 200px;
            }
        }

        /* ========== STATS ROW ========== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 36px;
        }
        .stat-item-kaiyun {
            text-align: center;
            padding: 28px 16px;
            background: var(--brand-surface);
            border-radius: var(--brand-radius-lg);
            border: 1px solid var(--brand-border-light);
            transition: all var(--brand-transition);
        }
        .stat-item-kaiyun:hover {
            box-shadow: var(--brand-shadow-md);
            border-color: var(--brand-accent-soft);
        }
        .stat-number {
            font-family: var(--brand-font-heading);
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--brand-accent);
            letter-spacing: 0.02em;
            line-height: 1.1;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--brand-text-soft);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stat-number {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-number {
                font-size: 1.7rem;
            }
            .stat-item-kaiyun {
                padding: 20px 12px;
            }
        }

        /* ========== ARTICLE LIST ========== */
        .article-list-kaiyun {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 30px;
        }
        .article-item-kaiyun {
            display: flex;
            gap: 20px;
            padding: 20px 24px;
            background: var(--brand-surface);
            border-radius: var(--brand-radius-md);
            border: 1px solid var(--brand-border-light);
            transition: all var(--brand-transition);
            align-items: center;
        }
        .article-item-kaiyun:hover {
            box-shadow: var(--brand-shadow-md);
            border-color: var(--brand-accent-soft);
        }
        .article-thumb {
            width: 120px;
            height: 80px;
            border-radius: var(--brand-radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .article-info {
            flex: 1;
            min-width: 0;
        }
        .article-info .article-date {
            font-size: 0.78rem;
            color: var(--brand-text-light);
            letter-spacing: 0.03em;
        }
        .article-info h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--brand-primary);
            margin: 4px 0;
            line-height: 1.4;
        }
        .article-info p {
            font-size: 0.88rem;
            color: var(--brand-text-soft);
            margin: 0;
            line-height: 1.5;
        }
        @media (max-width: 600px) {
            .article-item-kaiyun {
                flex-direction: column;
                gap: 12px;
                padding: 16px;
            }
            .article-thumb {
                width: 100%;
                height: 160px;
            }
        }

        /* ========== FAQ ACCORDION ========== */
        .faq-list-kaiyun {
            margin-top: 30px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item-kaiyun {
            border: 1px solid var(--brand-border-light);
            border-radius: var(--brand-radius-md);
            overflow: hidden;
            background: var(--brand-surface);
            transition: all var(--brand-transition);
        }
        .faq-item-kaiyun:hover {
            border-color: var(--brand-accent-soft);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--brand-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: all var(--brand-transition);
            border: none;
            background: none;
            cursor: pointer;
        }
        .faq-question i {
            font-size: 0.8rem;
            color: var(--brand-accent);
            transition: transform var(--brand-transition);
            flex-shrink: 0;
        }
        .faq-item-kaiyun.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
            font-size: 0.93rem;
            color: var(--brand-text-soft);
            line-height: 1.7;
        }
        .faq-item-kaiyun.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section-kaiyun {
            background: var(--brand-primary);
            border-radius: var(--brand-radius-xl);
            padding: 50px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section-kaiyun::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(200, 168, 124, 0.12);
            pointer-events: none;
        }
        .cta-section-kaiyun h3 {
            font-family: var(--brand-font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }
        .cta-section-kaiyun p {
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            font-size: 1rem;
        }
        .btn-cta-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            background: var(--brand-accent);
            color: #fff;
            letter-spacing: 0.03em;
            transition: all var(--brand-transition);
            position: relative;
            z-index: 1;
            border: none;
        }
        .btn-cta-lg:hover {
            background: #b89468;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--brand-shadow-lg);
        }
        @media (max-width: 520px) {
            .cta-section-kaiyun {
                padding: 34px 20px;
                border-radius: var(--brand-radius-lg);
            }
            .cta-section-kaiyun h3 {
                font-size: 1.4rem;
            }
        }

        /* ========== FOOTER ========== */
        .footer-kaiyun {
            background: var(--brand-primary);
            color: rgba(255, 255, 255, 0.78);
            padding: 50px 0 30px;
            font-size: 0.9rem;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-family: var(--brand-font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
            margin-bottom: 10px;
        }
        .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            font-size: 0.86rem;
        }
        .footer-kaiyun h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
        }
        .footer-kaiyun ul li {
            margin-bottom: 8px;
        }
        .footer-kaiyun ul li a {
            color: rgba(255, 255, 255, 0.62);
            transition: color var(--brand-transition);
            font-size: 0.87rem;
        }
        .footer-kaiyun ul li a:hover {
            color: var(--brand-accent-soft);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-grid>div:first-child {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer-kaiyun {
                padding: 36px 0 22px;
            }
        }

        /* ========== MISC ========== */
        .text-accent {
            color: var(--brand-accent);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .fw-600 {
            font-weight: 600;
        }
        .divider-kaiyun {
            width: 50px;
            height: 3px;
            background: var(--brand-accent);
            border-radius: 2px;
            margin: 12px 0 20px;
        }

/* roulang page: category2 */
:root {
            --color-primary: #1c1c24;
            --color-accent: #b8924e;
            --color-accent-light: #d4b87a;
            --color-accent-subtle: #f5efe2;
            --color-bg: #faf8f4;
            --color-surface: #ffffff;
            --color-surface-alt: #f3f0ea;
            --color-text: #1c1c24;
            --color-text-soft: #5c5c68;
            --color-text-muted: #8a8a94;
            --color-border: #e5e2db;
            --color-border-light: #f0ede7;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.10);
            --transition-fast: 160ms ease;
            --transition-base: 260ms ease;
            --transition-slow: 380ms ease;
            --font-display: 'Georgia', 'Noto Serif SC', 'STSong', 'Songti SC', 'SimSun', serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --navbar-height: 64px;
            --container-max: 1200px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-2xl: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            letter-spacing: 0.01em;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }

        input,
        button {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        input:focus-visible,
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        h1,
        h2,
        h3,
        h4,
        h5 {
            line-height: 1.3;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: -0.01em;
        }
        h1 {
            font-size: clamp(2rem, 4vw, 2.8rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.2vw, 1.5rem);
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--spacing-md);
            padding-right: var(--spacing-md);
        }
        @media (max-width: 768px) {
            .container-custom {
                padding-left: var(--spacing-sm);
                padding-right: var(--spacing-sm);
            }
        }

        .section-spacing {
            padding-top: var(--spacing-xl);
            padding-bottom: var(--spacing-xl);
        }
        @media (min-width: 1024px) {
            .section-spacing {
                padding-top: var(--spacing-2xl);
                padding-bottom: var(--spacing-2xl);
            }
        }

        /* ===== NAVBAR ===== */
        .navbar-kaiyun {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--navbar-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }
        .navbar-kaiyun.scrolled {
            box-shadow: var(--shadow-md);
        }
        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: var(--spacing-md);
            flex-wrap: nowrap;
        }
        .navbar-brand-kaiyun {
            font-family: var(--font-display);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.03em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .navbar-brand-kaiyun:hover {
            color: var(--color-accent);
        }
        .brand-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            flex-shrink: 0;
        }
        .nav-links-kaiyun {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 6px;
            margin: 0;
            padding: 0;
            flex-shrink: 0;
        }
        .nav-item-kaiyun {
            position: relative;
        }
        .nav-link-kaiyun {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-soft);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-link-kaiyun:hover {
            color: var(--color-primary);
            background: var(--color-surface-alt);
        }
        .nav-link-kaiyun.active {
            color: var(--color-accent);
            background: var(--color-accent-subtle);
            font-weight: 600;
        }
        .nav-indicator {
            display: inline-block;
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: transparent;
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-link-kaiyun.active .nav-indicator {
            background: var(--color-accent);
        }
        .navbar-right-kaiyun {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box-kaiyun {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-box-kaiyun input {
            width: 200px;
            padding: 9px 36px 9px 14px;
            border: 1px solid var(--color-border);
            border-radius: 24px;
            font-size: 0.88rem;
            color: var(--color-text);
            background: var(--color-surface);
            transition: all var(--transition-fast);
            outline: none;
        }
        .search-box-kaiyun input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(184, 146, 78, 0.1);
            width: 240px;
        }
        .search-box-kaiyun input::placeholder {
            color: var(--color-text-muted);
        }
        .search-shortcut {
            position: absolute;
            right: 34px;
            font-size: 0.7rem;
            color: var(--color-text-muted);
            background: var(--color-surface-alt);
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
            pointer-events: none;
        }
        .search-icon {
            position: absolute;
            right: 12px;
            color: var(--color-text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--color-accent);
            color: #fff;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: none;
        }
        .btn-cta-nav:hover {
            background: var(--color-accent-light);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .navbar-toggler-kaiyun {
            display: none;
            font-size: 1.4rem;
            color: var(--color-primary);
            padding: 4px 8px;
            border-radius: 6px;
        }
        .hide-desktop {
            display: none;
        }
        .hide-mobile {
            display: flex;
        }
        @media (max-width: 1024px) {
            .search-box-kaiyun input {
                width: 150px;
            }
            .search-box-kaiyun input:focus {
                width: 180px;
            }
            .nav-link-kaiyun {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 768px) {
            .hide-mobile {
                display: none;
            }
            .hide-desktop {
                display: flex;
            }
            .navbar-toggler-kaiyun {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .nav-links-kaiyun {
                position: absolute;
                top: var(--navbar-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--color-border);
                padding: 16px 20px;
                gap: 4px;
                display: none;
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .nav-links-kaiyun.open {
                display: flex;
            }
            .nav-link-kaiyun {
                width: 100%;
                padding: 12px 16px;
                border-radius: 8px;
                font-size: 0.95rem;
            }
            .navbar-right-kaiyun .btn-cta-nav {
                font-size: 0.82rem;
                padding: 8px 14px;
            }
        }
        @media (max-width: 480px) {
            .navbar-brand-kaiyun {
                font-size: 1.15rem;
            }
            .btn-cta-nav {
                font-size: 0.76rem;
                padding: 7px 12px;
            }
        }

        /* ===== PAGE BANNER ===== */
        .page-banner {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            background: var(--color-primary);
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(28, 28, 36, 0.82) 0%, rgba(28, 28, 36, 0.45) 55%, rgba(28, 28, 36, 0.22) 100%);
            z-index: 1;
        }
        .page-banner-content {
            position: relative;
            z-index: 2;
            padding: var(--spacing-xl) 0;
            color: #fff;
        }
        .page-banner-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            color: var(--color-accent-light);
            margin-bottom: var(--spacing-sm);
            border: 1px solid rgba(255, 255, 255, 0.18);
        }
        .page-banner-content h1 {
            color: #fff;
            font-family: var(--font-display);
            font-size: clamp(2.2rem, 5vw, 3.2rem);
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.02em;
        }
        .page-banner-content .banner-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.88);
            max-width: 600px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .page-banner {
                min-height: 260px;
            }
            .page-banner-content h1 {
                font-size: 1.7rem;
            }
            .page-banner-content .banner-desc {
                font-size: 0.95rem;
            }
        }

        /* ===== SECTION TITLES ===== */
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: var(--spacing-xs);
        }
        .section-title {
            font-family: var(--font-display);
            font-size: clamp(1.6rem, 3.2vw, 2.2rem);
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            color: var(--color-primary);
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-soft);
            max-width: 580px;
            line-height: 1.7;
        }

        /* ===== CARDS GRID ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 600px) {
            .cards-grid {
                grid-template-columns: 1fr;
            }
        }
        .card-creative {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .card-creative:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-creative-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: var(--color-surface-alt);
        }
        .card-creative-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .card-creative:hover .card-creative-img-wrap img {
            transform: scale(1.05);
        }
        .card-creative-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(28, 28, 36, 0.75);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            color: #fff;
            padding: 5px 12px;
            border-radius: 16px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }
        .card-creative-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-creative-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--color-primary);
        }
        .card-creative-body p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }
        .card-creative-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        .card-creative-meta .dot-sep {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--color-border);
        }

        /* ===== FEATURE ROW ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        @media (max-width: 768px) {
            .feature-row {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
        }
        .feature-image-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            aspect-ratio: 5 / 4;
            background: var(--color-surface-alt);
        }
        .feature-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-text h3 {
            font-family: var(--font-display);
            font-size: 1.5rem;
            margin-bottom: var(--spacing-sm);
        }
        .feature-text p {
            color: var(--color-text-soft);
            line-height: 1.8;
            margin-bottom: var(--spacing-sm);
        }
        .feature-list {
            list-style: none;
            padding: 0;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            color: var(--color-text-soft);
            font-size: 0.94rem;
        }
        .feature-list li i {
            color: var(--color-accent);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== STATS STRIP ===== */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }
        @media (max-width: 768px) {
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
        }
        .stat-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            text-align: center;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-number {
            font-family: var(--font-display);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.1;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 4px;
        }
        @media (max-width: 480px) {
            .stat-number {
                font-size: 1.6rem;
            }
        }

        /* ===== PROCESS LIST ===== */
        .process-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .process-item {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-md);
            background: var(--color-surface);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .process-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--color-border);
        }
        .process-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-accent-subtle);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            font-family: var(--font-display);
        }
        .process-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--color-primary);
        }
        .process-content p {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            margin: 0;
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 16px 20px;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--color-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question i {
            font-size: 0.8rem;
            transition: transform var(--transition-base);
            color: var(--color-text-muted);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 20px 16px;
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: var(--color-primary);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(184, 146, 78, 0.25) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            font-family: var(--font-display);
            margin-bottom: var(--spacing-sm);
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 500px;
            margin: 0 auto var(--spacing-md);
            font-size: 0.98rem;
        }
        .btn-cta-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--color-accent);
            color: #fff;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
            border: none;
        }
        .btn-cta-lg:hover {
            background: var(--color-accent-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        .btn-outline-light-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: #fff;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: all var(--transition-fast);
            margin-left: 12px;
        }
        .btn-outline-light-cta:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        @media (max-width: 600px) {
            .cta-section {
                padding: var(--spacing-lg) var(--spacing-md);
                border-radius: var(--radius-lg);
            }
            .btn-outline-light-cta {
                margin-left: 0;
                margin-top: 10px;
            }
        }

        /* ===== FOOTER ===== */
        .footer-kaiyun {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            padding-bottom: var(--spacing-lg);
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-desc {
            font-size: 0.88rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-grid h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
        }
        .footer-grid ul li {
            margin-bottom: 6px;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-grid ul li a:hover {
            color: var(--color-accent-light);
        }
        .footer-bottom {
            text-align: center;
            padding-top: var(--spacing-md);
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.45);
            line-height: 1.6;
        }

        /* ===== UTILITY ===== */
        .text-center {
            text-align: center;
        }
        .mb-lg {
            margin-bottom: var(--spacing-lg);
        }
        .mb-md {
            margin-bottom: var(--spacing-md);
        }
        .accent-text {
            color: var(--color-accent);
        }
        .bg-alt {
            background: var(--color-surface-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        @media (min-width: 768px) {
            .section-header {
                margin-bottom: var(--spacing-xl);
            }
        }

/* roulang page: category4 */
/* ========== 设计变量 ========== */
        :root {
            --color-primary: #1a1f2e;
            --color-primary-light: #252d3f;
            --color-accent: #c8a97e;
            --color-accent-hover: #b8945f;
            --color-accent-subtle: rgba(200, 169, 126, 0.12);
            --color-bg: #f9f7f4;
            --color-bg-alt: #f1ede8;
            --color-bg-dark: #1a1f2e;
            --color-surface: #ffffff;
            --color-text: #2c2c2c;
            --color-text-weak: #6b6b6b;
            --color-text-muted: #999999;
            --color-text-inverse: #f5f3ef;
            --color-border: #e6e0d8;
            --color-border-light: #f0ebe3;
            --color-success: #5a8a6a;
            --color-warning: #c8963e;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.13);
            --shadow-gold: 0 8px 28px rgba(200, 169, 126, 0.18);
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 64px;
            --spacing-3xl: 80px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-display: 'Georgia', 'Noto Serif SC', 'STSong', 'SimSun', serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            min-height: 100vh;
            overflow-x: hidden;
            font-size: 16px;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

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

        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0;
            line-height: 1.3;
            font-weight: 600;
        }

        /* ========== 容器 ========== */
        .container-custom {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding-left: var(--spacing-lg);
            padding-right: var(--spacing-lg);
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-left: var(--spacing-md);
                padding-right: var(--spacing-md);
            }
        }

        /* ========== 导航栏 ========== */
        .navbar-kaiyun {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            padding: 0;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-xs);
        }

        .navbar-kaiyun.scrolled {
            box-shadow: var(--shadow-sm);
            border-bottom-color: var(--color-border);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 62px;
            gap: var(--spacing-md);
        }

        .navbar-brand-kaiyun {
            font-family: var(--font-display);
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: 0.03em;
            display: flex;
            align-items: center;
            gap: 5px;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }

        .navbar-brand-kaiyun:hover {
            color: var(--color-accent);
        }

        .brand-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-accent);
            display: inline-block;
            margin-left: 2px;
            animation: brandPulse 2.4s ease-in-out infinite;
        }

        @keyframes brandPulse {
            0%,
            100% {
                opacity: 0.7;
                transform: scale(1);
            }
            50% {
                opacity: 1;
                transform: scale(1.35);
            }
        }

        .nav-links-kaiyun {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
        }

        .nav-item-kaiyun {
            position: relative;
        }

        .nav-link-kaiyun {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 8px 15px;
            border-radius: var(--radius-full);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.02em;
        }

        .nav-link-kaiyun:hover {
            color: var(--color-primary);
            background: var(--color-accent-subtle);
        }

        .nav-link-kaiyun.active {
            color: var(--color-primary);
            font-weight: 600;
            background: var(--color-accent-subtle);
        }

        .nav-indicator {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--color-accent);
            opacity: 0;
            transform: scale(0);
            transition: all var(--transition-fast);
        }

        .nav-link-kaiyun.active .nav-indicator {
            opacity: 1;
            transform: scale(1);
        }

        .navbar-right-kaiyun {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }

        .search-box-kaiyun {
            position: relative;
            display: flex;
            align-items: center;
        }

        .search-box-kaiyun input {
            width: 200px;
            padding: 9px 38px 9px 16px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            background: var(--color-bg);
            font-size: 0.88rem;
            color: var(--color-text);
            outline: none;
            transition: all var(--transition-fast);
        }

        .search-box-kaiyun input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px var(--color-accent-subtle);
            width: 240px;
            background: #fff;
        }

        .search-box-kaiyun input::placeholder {
            color: var(--color-text-muted);
        }

        .search-shortcut {
            position: absolute;
            right: 36px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 0.7rem;
            color: var(--color-text-muted);
            background: var(--color-border-light);
            padding: 2px 7px;
            border-radius: 4px;
            font-family: var(--font-mono);
            pointer-events: none;
            letter-spacing: 0;
        }

        .search-icon {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--color-primary);
            color: #fff;
            border: none;
            white-space: nowrap;
            transition: all var(--transition-fast);
            letter-spacing: 0.03em;
        }

        .btn-cta-nav:hover {
            background: var(--color-accent);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-gold);
        }

        .navbar-toggler-kaiyun {
            display: none;
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--color-primary);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .navbar-toggler-kaiyun:hover {
            background: var(--color-accent-subtle);
            color: var(--color-accent);
        }

        .hide-desktop {
            display: none !important;
        }

        .hide-mobile {
            display: flex;
        }

        @media (max-width: 1024px) {
            .search-box-kaiyun input {
                width: 150px;
            }
            .search-box-kaiyun input:focus {
                width: 190px;
            }
            .nav-link-kaiyun {
                padding: 7px 11px;
                font-size: 0.85rem;
            }
            .navbar-brand-kaiyun {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 768px) {
            .hide-desktop {
                display: flex !important;
            }
            .hide-mobile {
                display: none !important;
            }
            .navbar-inner {
                height: 56px;
                flex-wrap: wrap;
            }
            .navbar-toggler-kaiyun {
                display: flex;
            }
            .nav-links-kaiyun {
                display: none;
                position: absolute;
                top: 56px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: #fff;
                border-bottom: 1px solid var(--color-border);
                padding: var(--spacing-sm) var(--spacing-md);
                gap: 2px;
                box-shadow: var(--shadow-md);
                z-index: 1040;
            }
            .nav-links-kaiyun.show {
                display: flex;
            }
            .nav-link-kaiyun {
                width: 100%;
                border-radius: var(--radius-md);
                padding: 12px 16px;
                font-size: 0.95rem;
            }
            .navbar-right-kaiyun {
                gap: 8px;
            }
            .btn-cta-nav {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
            .search-box-kaiyun input {
                width: 130px;
                padding: 8px 32px 8px 12px;
                font-size: 0.8rem;
            }
            .search-box-kaiyun input:focus {
                width: 160px;
            }
            .search-shortcut {
                right: 30px;
                font-size: 0.65rem;
            }
        }

        @media (max-width: 520px) {
            .navbar-inner {
                height: 52px;
                gap: 6px;
            }
            .navbar-brand-kaiyun {
                font-size: 1.15rem;
            }
            .btn-cta-nav {
                padding: 7px 10px;
                font-size: 0.75rem;
                gap: 3px;
            }
            .search-box-kaiyun input {
                width: 100px;
                font-size: 0.75rem;
            }
            .search-box-kaiyun input:focus {
                width: 130px;
            }
            .nav-links-kaiyun {
                top: 52px;
            }
        }

        /* ========== 页面Banner ========== */
        .page-banner-kaiyun {
            position: relative;
            background: var(--color-bg-dark);
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 100px 0 80px;
            overflow: hidden;
        }

        .page-banner-kaiyun::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 31, 46, 0.82) 0%, rgba(26, 31, 46, 0.55) 50%, rgba(26, 31, 46, 0.72) 100%);
            z-index: 1;
        }

        .page-banner-kaiyun::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, rgba(26, 31, 46, 0.4), transparent);
            z-index: 1;
        }

        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 750px;
            margin: 0 auto;
        }

        .banner-badge {
            display: inline-block;
            padding: 8px 18px;
            background: rgba(200, 169, 126, 0.2);
            border: 1px solid rgba(200, 169, 126, 0.35);
            border-radius: var(--radius-full);
            color: var(--color-accent);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.06em;
            margin-bottom: var(--spacing-lg);
            backdrop-filter: blur(4px);
        }

        .banner-content h1 {
            font-family: var(--font-display);
            font-size: 2.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.04em;
            line-height: 1.25;
        }

        .banner-content h1 .accent {
            color: var(--color-accent);
        }

        .banner-content .banner-subtitle {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: var(--spacing-lg);
            max-width: 580px;
            margin-left: auto;
            margin-right: auto;
        }

        .banner-stats-row {
            display: flex;
            justify-content: center;
            gap: var(--spacing-xl);
            margin-top: var(--spacing-lg);
            flex-wrap: wrap;
        }

        .banner-stat {
            text-align: center;
        }

        .banner-stat .stat-number {
            font-family: var(--font-display);
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            display: block;
            line-height: 1;
        }

        .banner-stat .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
            letter-spacing: 0.04em;
        }

        @media (max-width: 768px) {
            .page-banner-kaiyun {
                padding: 70px 0 50px;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
            .banner-content .banner-subtitle {
                font-size: 1rem;
            }
            .banner-stats-row {
                gap: var(--spacing-md);
            }
            .banner-stat .stat-number {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner-kaiyun {
                padding: 50px 0 40px;
            }
            .banner-content h1 {
                font-size: 1.5rem;
            }
            .banner-content .banner-subtitle {
                font-size: 0.9rem;
            }
            .banner-badge {
                font-size: 0.75rem;
                padding: 6px 14px;
            }
            .banner-stat .stat-number {
                font-size: 1.3rem;
            }
            .banner-stat .stat-label {
                font-size: 0.72rem;
            }
        }

        /* ========== 板块通用 ========== */
        .section-kaiyun {
            padding: var(--spacing-3xl) 0;
        }

        .section-kaiyun.alt-bg {
            background: var(--color-bg-alt);
        }

        .section-kaiyun.dark-bg {
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
        }

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
        }

        .section-header h2 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.03em;
        }

        .dark-bg .section-header h2 {
            color: #fff;
        }

        .section-header .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-weak);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .dark-bg .section-header .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-divider {
            width: 50px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px;
            margin: var(--spacing-md) auto 0;
        }

        @media (max-width: 768px) {
            .section-kaiyun {
                padding: var(--spacing-2xl) 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header .section-subtitle {
                font-size: 0.95rem;
            }
        }

        /* ========== 卡片系统 ========== */
        .card-kaiyun {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card-kaiyun:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border);
        }

        .card-kaiyun .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--color-bg-alt);
        }

        .card-kaiyun .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .card-kaiyun:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .card-kaiyun .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 5px 12px;
            background: rgba(26, 31, 46, 0.78);
            color: #fff;
            font-size: 0.78rem;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
            backdrop-filter: blur(6px);
            z-index: 2;
        }

        .card-kaiyun .card-body {
            padding: var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-kaiyun .card-title {
            font-size: 1.15rem;
            font-weight: 650;
            color: var(--color-primary);
            margin-bottom: var(--spacing-xs);
            letter-spacing: 0.02em;
            line-height: 1.4;
        }

        .card-kaiyun .card-desc {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.6;
            flex: 1;
            margin-bottom: var(--spacing-sm);
        }

        .card-kaiyun .card-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.82rem;
            color: var(--color-text-muted);
            padding-top: var(--spacing-sm);
            border-top: 1px solid var(--color-border-light);
        }

        .card-kaiyun .card-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-weight: 600;
            color: var(--color-accent);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            margin-top: auto;
            padding-top: var(--spacing-sm);
        }

        .card-kaiyun .card-link:hover {
            color: var(--color-accent-hover);
            gap: 8px;
        }

        /* 特色卡片 - 横向 */
        .card-feature-kaiyun {
            display: flex;
            gap: var(--spacing-lg);
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            border: 1px solid var(--color-border-light);
            padding: var(--spacing-xl);
            align-items: center;
            transition: all var(--transition-smooth);
        }

        .card-feature-kaiyun:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }

        .card-feature-kaiyun .feature-icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-lg);
            background: var(--color-accent-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 1.5rem;
            color: var(--color-accent);
        }

        .card-feature-kaiyun .feature-info h4 {
            font-size: 1.1rem;
            font-weight: 650;
            color: var(--color-primary);
            margin-bottom: 4px;
        }

        .card-feature-kaiyun .feature-info p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .card-feature-kaiyun {
                flex-direction: column;
                text-align: center;
                padding: var(--spacing-lg);
                gap: var(--spacing-md);
            }
            .card-feature-kaiyun .feature-icon-wrap {
                margin: 0 auto;
            }
            .card-kaiyun .card-body {
                padding: var(--spacing-md);
            }
            .card-kaiyun .card-title {
                font-size: 1.05rem;
            }
        }

        /* ========== 按钮系统 ========== */
        .btn-kaiyun {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 12px 26px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.03em;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
        }

        .btn-kaiyun-primary {
            background: var(--color-primary);
            color: #fff;
        }
        .btn-kaiyun-primary:hover {
            background: var(--color-accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-gold);
        }

        .btn-kaiyun-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-kaiyun-outline:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn-kaiyun-accent {
            background: var(--color-accent);
            color: #fff;
        }
        .btn-kaiyun-accent:hover {
            background: var(--color-accent-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-gold);
        }

        .btn-kaiyun-lg {
            padding: 15px 34px;
            font-size: 1.05rem;
        }

        .btn-kaiyun:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 3px;
        }

        /* ========== 资讯列表 ========== */
        .news-list-kaiyun {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .news-item-kaiyun {
            display: flex;
            gap: var(--spacing-lg);
            padding: var(--spacing-lg);
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            align-items: flex-start;
        }

        .news-item-kaiyun:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
            transform: translateX(3px);
        }

        .news-item-kaiyun .news-thumb {
            width: 180px;
            height: 120px;
            border-radius: var(--radius-md);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--color-bg-alt);
        }

        .news-item-kaiyun .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .news-item-kaiyun:hover .news-thumb img {
            transform: scale(1.06);
        }

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

        .news-item-kaiyun .news-info h4 {
            font-size: 1.08rem;
            font-weight: 650;
            color: var(--color-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .news-item-kaiyun .news-info p {
            font-size: 0.88rem;
            color: var(--color-text-weak);
            margin: 0;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item-kaiyun .news-meta {
            display: flex;
            gap: var(--spacing-md);
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-top: 8px;
        }

        @media (max-width: 768px) {
            .news-item-kaiyun {
                flex-direction: column;
                gap: var(--spacing-md);
                padding: var(--spacing-md);
            }
            .news-item-kaiyun .news-thumb {
                width: 100%;
                height: 180px;
            }
            .news-item-kaiyun .news-info h4 {
                font-size: 1rem;
            }
        }

        /* ========== FAQ折叠 ========== */
        .faq-list-kaiyun {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .faq-item-kaiyun {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item-kaiyun:hover {
            border-color: var(--color-border);
        }

        .faq-question-kaiyun {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-lg);
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            cursor: pointer;
            text-align: left;
            gap: var(--spacing-md);
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }

        .faq-question-kaiyun:hover {
            color: var(--color-accent);
            background: var(--color-accent-subtle);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
        }

        .faq-item-kaiyun.open .faq-icon {
            background: var(--color-accent);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer-kaiyun {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
        }

        .faq-item-kaiyun.open .faq-answer-kaiyun {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 var(--spacing-lg) var(--spacing-lg);
            font-size: 0.92rem;
            color: var(--color-text-weak);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .faq-question-kaiyun {
                padding: var(--spacing-md);
                font-size: 0.95rem;
            }
            .faq-answer-inner {
                padding: 0 var(--spacing-md) var(--spacing-md);
                font-size: 0.88rem;
            }
        }

        /* ========== CTA区域 ========== */
        .cta-section-kaiyun {
            background: var(--color-bg-dark);
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            padding: var(--spacing-3xl) 0;
            text-align: center;
        }

        .cta-section-kaiyun::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26, 31, 46, 0.85);
            z-index: 1;
        }

        .cta-section-kaiyun .container-custom {
            position: relative;
            z-index: 2;
        }

        .cta-section-kaiyun h2 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.04em;
        }

        .cta-section-kaiyun p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
            margin: 0 auto var(--spacing-lg);
            line-height: 1.6;
        }

        .cta-buttons {
            display: flex;
            gap: var(--spacing-md);
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .cta-section-kaiyun {
                padding: var(--spacing-2xl) 0;
            }
            .cta-section-kaiyun h2 {
                font-size: 1.6rem;
            }
            .cta-section-kaiyun p {
                font-size: 0.95rem;
            }
        }

        /* ========== 页脚 ========== */
        .footer-kaiyun {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.75);
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }

        .footer-brand {
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.04em;
        }

        .footer-desc {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin: 0;
        }

        .footer-grid h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.04em;
        }

        .footer-grid ul li {
            margin-bottom: 8px;
        }

        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.65);
            transition: all var(--transition-fast);
            font-size: 0.88rem;
        }

        .footer-grid ul li a:hover {
            color: var(--color-accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: var(--spacing-lg);
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
            .footer-grid>div:first-child {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-brand {
                font-size: 1.15rem;
            }
        }

        /* ========== 面包屑 ========== */
        .breadcrumb-kaiyun {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: var(--spacing-md);
            flex-wrap: wrap;
            justify-content: center;
            position: relative;
            z-index: 2;
        }

        .breadcrumb-kaiyun a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition-fast);
        }

        .breadcrumb-kaiyun a:hover {
            color: var(--color-accent);
        }

        .breadcrumb-kaiyun .separator {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.7rem;
        }

        .breadcrumb-kaiyun .current {
            color: var(--color-accent);
            font-weight: 500;
        }

        /* ========== 网格 ========== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
            }
        }

        /* ========== 数字体验特色区块 ========== */
        .exp-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .exp-showcase .showcase-img {
            border-radius: var(--radius-xl);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: var(--color-bg-alt);
            box-shadow: var(--shadow-lg);
        }

        .exp-showcase .showcase-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .exp-showcase .showcase-text h3 {
            font-family: var(--font-display);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.03em;
        }

        .exp-showcase .showcase-text p {
            font-size: 1rem;
            color: var(--color-text-weak);
            line-height: 1.75;
            margin-bottom: var(--spacing-md);
        }

        .exp-showcase .showcase-features {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-lg);
        }

        .exp-showcase .showcase-features .feature-pill {
            padding: 7px 16px;
            background: var(--color-accent-subtle);
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            color: var(--color-primary);
            font-weight: 500;
            letter-spacing: 0.03em;
        }

        @media (max-width: 768px) {
            .exp-showcase {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .exp-showcase .showcase-text h3 {
                font-size: 1.35rem;
            }
            .exp-showcase .showcase-text p {
                font-size: 0.92rem;
            }
        }

        /* ========== 标签 ========== */
        .tag-kaiyun {
            display: inline-block;
            padding: 5px 13px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            background: var(--color-accent-subtle);
            color: var(--color-accent);
        }

        .tag-kaiyun.dark {
            background: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.85);
        }

        /* ========== 辅助动画 ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(25px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.6s ease-out forwards;
        }

/* roulang page: category3 */
:root {
            --color-primary: #1a1a2e;
            --color-primary-soft: #252540;
            --color-accent: #b8860b;
            --color-accent-hover: #9a6f09;
            --color-accent-green: #2d6a4f;
            --color-accent-green-soft: #3d8b6a;
            --color-bg: #fafaf8;
            --color-bg-alt: #f3f2ee;
            --color-bg-dark: #1a1a2e;
            --color-text: #2c2c2c;
            --color-text-light: #5a5a5a;
            --color-muted: #7a7a76;
            --color-border: #e4e4df;
            --color-border-light: #eeece6;
            --color-card: #ffffff;
            --color-card-hover: #fefefc;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-heading: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --nav-height: 68px;
            --container-max: 1240px;
            --container-padding: 24px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-padding);
            padding-right: var(--container-padding);
        }

        /* ========== NAVBAR ========== */
        .navbar-kaiyun {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }
        .navbar-kaiyun.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(255, 255, 255, 0.97);
        }
        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }
        .navbar-brand-kaiyun {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: var(--color-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .navbar-brand-kaiyun:hover {
            color: var(--color-accent);
        }
        .brand-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-accent);
            flex-shrink: 0;
        }
        .nav-links-kaiyun {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }
        .nav-item-kaiyun {
            position: relative;
        }
        .nav-link-kaiyun {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 8px 15px;
            border-radius: 22px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--color-text-light);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-link-kaiyun .nav-indicator {
            display: none;
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--color-accent);
            flex-shrink: 0;
        }
        .nav-link-kaiyun:hover {
            color: var(--color-primary);
            background: rgba(0, 0, 0, 0.04);
        }
        .nav-link-kaiyun.active {
            color: var(--color-primary);
            font-weight: 600;
            background: rgba(0, 0, 0, 0.05);
        }
        .nav-link-kaiyun.active .nav-indicator {
            display: inline-block;
        }
        .navbar-right-kaiyun {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box-kaiyun {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-box-kaiyun input {
            width: 190px;
            padding: 9px 14px 9px 36px;
            border: 1px solid var(--color-border);
            border-radius: 22px;
            font-size: 0.88rem;
            background: var(--color-bg);
            color: var(--color-text);
            transition: all var(--transition-fast);
            outline: none;
        }
        .search-box-kaiyun input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.08);
            width: 220px;
            background: #fff;
        }
        .search-box-kaiyun .search-icon {
            position: absolute;
            left: 13px;
            color: var(--color-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .search-box-kaiyun .search-shortcut {
            position: absolute;
            right: 10px;
            font-size: 0.7rem;
            color: var(--color-muted);
            background: var(--color-border-light);
            padding: 2px 6px;
            border-radius: 4px;
            pointer-events: none;
            letter-spacing: 0.04em;
        }
        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 22px;
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--color-primary);
            color: #fff;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .btn-cta-nav:hover {
            background: var(--color-accent);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .navbar-toggler-kaiyun {
            display: none;
            font-size: 1.4rem;
            color: var(--color-primary);
            padding: 6px 10px;
            border-radius: 8px;
            transition: background var(--transition-fast);
        }
        .navbar-toggler-kaiyun:hover {
            background: rgba(0, 0, 0, 0.05);
        }
        .hide-desktop {
            display: none !important;
        }
        .hide-mobile {
            display: flex !important;
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: url('assets/images/backpic/back-2.webp') center/cover no-repeat;
            background-position: center 35%;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border-light);
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(26, 26, 46, 0.78) 0%, rgba(26, 26, 46, 0.45) 45%, rgba(45, 106, 79, 0.35) 100%);
            z-index: 1;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            padding: 60px 0;
            max-width: 700px;
        }
        .page-banner .banner-label {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.05em;
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            backdrop-filter: blur(4px);
            margin-bottom: 18px;
        }
        .page-banner h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .page-banner .banner-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.88);
            line-height: 1.65;
            max-width: 560px;
        }

        /* ========== SECTIONS ========== */
        .section-kaiyun {
            padding: 64px 0;
        }
        .section-kaiyun.section-alt {
            background: var(--color-bg-alt);
        }
        .section-kaiyun.section-dark {
            background: var(--color-bg-dark);
            color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-header h2 {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            margin-bottom: 10px;
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-header .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-dark .section-header .section-subtitle {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ========== CARDS ========== */
        .card-kaiyun {
            background: var(--color-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card-kaiyun:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            background: var(--color-card-hover);
        }
        .card-kaiyun .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--color-bg-alt);
        }
        .card-kaiyun .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .card-kaiyun:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .card-kaiyun .card-body-custom {
            padding: 22px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-kaiyun .card-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--color-accent-green);
            background: rgba(45, 106, 79, 0.08);
            padding: 4px 10px;
            border-radius: 14px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .card-kaiyun h3 {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 650;
            color: var(--color-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-kaiyun p {
            font-size: 0.93rem;
            color: var(--color-muted);
            line-height: 1.6;
            margin-bottom: 0;
            flex: 1;
        }
        .card-kaiyun .card-link-more {
            margin-top: 14px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition-fast);
        }
        .card-kaiyun .card-link-more:hover {
            gap: 9px;
            color: var(--color-accent-hover);
        }
        .card-kaiyun .card-link-more i {
            font-size: 0.75rem;
        }

        /* ========== STAT CARDS ========== */
        .stat-card-kaiyun {
            background: var(--color-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-base);
            height: 100%;
        }
        .stat-card-kaiyun:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .stat-card-kaiyun .stat-icon {
            font-size: 2rem;
            color: var(--color-accent-green);
            margin-bottom: 12px;
        }
        .stat-card-kaiyun .stat-number {
            font-family: var(--font-heading);
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            line-height: 1.1;
        }
        .stat-card-kaiyun .stat-label {
            font-size: 0.92rem;
            color: var(--color-muted);
            margin-top: 6px;
            font-weight: 500;
        }

        /* ========== INFO LIST ========== */
        .info-list-kaiyun {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .info-list-kaiyun .info-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 20px;
            background: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .info-list-kaiyun .info-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: transparent;
            background: var(--color-card-hover);
        }
        .info-list-kaiyun .info-icon-circle {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(45, 106, 79, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--color-accent-green);
            font-size: 1.1rem;
        }
        .info-list-kaiyun .info-text h4 {
            font-size: 1.05rem;
            font-weight: 650;
            color: var(--color-primary);
            margin-bottom: 4px;
            font-family: var(--font-heading);
        }
        .info-list-kaiyun .info-text p {
            font-size: 0.9rem;
            color: var(--color-muted);
            margin: 0;
            line-height: 1.55;
        }

        /* ========== ARTICLE LIST ========== */
        .article-card-row {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 18px 20px;
            background: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .article-card-row:hover {
            box-shadow: var(--shadow-sm);
            border-color: transparent;
        }
        .article-card-row .article-thumb {
            width: 90px;
            height: 70px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--color-bg-alt);
        }
        .article-card-row .article-info h4 {
            font-size: 1rem;
            font-weight: 650;
            color: var(--color-primary);
            margin-bottom: 4px;
            line-height: 1.4;
            font-family: var(--font-heading);
        }
        .article-card-row .article-info p {
            font-size: 0.85rem;
            color: var(--color-muted);
            margin: 0;
            line-height: 1.5;
        }
        .article-card-row .article-meta {
            font-size: 0.78rem;
            color: var(--color-muted);
            margin-top: 6px;
            display: flex;
            gap: 14px;
        }

        /* ========== FAQ ========== */
        .faq-kaiyun .accordion-item {
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md) !important;
            margin-bottom: 10px;
            overflow: hidden;
            background: var(--color-card);
            transition: all var(--transition-fast);
        }
        .faq-kaiyun .accordion-item:hover {
            box-shadow: var(--shadow-xs);
        }
        .faq-kaiyun .accordion-button {
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-primary);
            background: transparent;
            box-shadow: none !important;
            padding: 18px 22px;
            border-radius: var(--radius-md) !important;
            transition: all var(--transition-fast);
            font-family: var(--font-heading);
        }
        .faq-kaiyun .accordion-button:not(.collapsed) {
            background: rgba(45, 106, 79, 0.04);
            color: var(--color-accent-green);
            border-bottom: 1px solid var(--color-border-light);
        }
        .faq-kaiyun .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.1) !important;
            border-color: var(--color-accent-green);
        }
        .faq-kaiyun .accordion-button::after {
            background-size: 16px;
            transition: transform var(--transition-base);
        }
        .faq-kaiyun .accordion-body {
            padding: 18px 22px;
            font-size: 0.93rem;
            color: var(--color-text-light);
            line-height: 1.7;
            background: var(--color-card);
        }

        /* ========== CTA ========== */
        .cta-section-kaiyun {
            background: linear-gradient(155deg, var(--color-primary) 0%, #1e2d3d 50%, var(--color-accent-green) 100%);
            border-radius: var(--radius-xl);
            padding: 50px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section-kaiyun::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }
        .cta-section-kaiyun::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -30px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }
        .cta-section-kaiyun h3 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            position: relative;
            z-index: 1;
            margin-bottom: 10px;
        }
        .cta-section-kaiyun p {
            font-size: 1.05rem;
            opacity: 0.85;
            position: relative;
            z-index: 1;
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-kaiyun {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 28px;
            font-weight: 650;
            font-size: 1rem;
            background: #fff;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            position: relative;
            z-index: 1;
        }
        .btn-cta-kaiyun:hover {
            background: var(--color-accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        /* ========== FOOTER ========== */
        .footer-kaiyun {
            background: var(--color-primary);
            color: #ccc;
            padding: 48px 0 28px;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.03em;
            margin-bottom: 10px;
        }
        .footer-desc {
            font-size: 0.88rem;
            line-height: 1.7;
            color: #aaa;
            margin-bottom: 0;
        }
        .footer-kaiyun h5 {
            color: #fff;
            font-weight: 650;
            font-size: 0.95rem;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
            font-family: var(--font-heading);
        }
        .footer-kaiyun ul li {
            margin-bottom: 8px;
        }
        .footer-kaiyun ul li a {
            color: #bbb;
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-kaiyun ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: #999;
            line-height: 1.6;
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hide-mobile {
                display: none !important;
            }
            .hide-desktop {
                display: flex !important;
            }
            .navbar-toggler-kaiyun {
                display: flex;
            }
            .nav-links-kaiyun {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: #fff;
                padding: 16px 20px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--color-border-light);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition-base);
                z-index: 1049;
            }
            .nav-links-kaiyun.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link-kaiyun {
                width: 100%;
                padding: 12px 16px;
                border-radius: 10px;
                font-size: 1rem;
            }
            .navbar-right-kaiyun {
                gap: 8px;
            }
            .btn-cta-nav {
                padding: 9px 16px;
                font-size: 0.85rem;
                border-radius: 20px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .page-banner {
                min-height: 340px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .section-kaiyun {
                padding: 44px 0;
            }
            .cta-section-kaiyun {
                padding: 36px 24px;
            }
            .cta-section-kaiyun h3 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --container-padding: 16px;
            }
            .navbar-brand-kaiyun {
                font-size: 1.15rem;
            }
            .page-banner {
                min-height: 300px;
            }
            .page-banner h1 {
                font-size: 1.75rem;
            }
            .page-banner .banner-desc {
                font-size: 0.95rem;
            }
            .page-banner .banner-content {
                padding: 40px 0;
            }
            .section-header h2 {
                font-size: 1.55rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .stat-card-kaiyun .stat-number {
                font-size: 2rem;
            }
            .card-kaiyun h3 {
                font-size: 1.05rem;
            }
            .article-card-row {
                flex-direction: column;
                align-items: stretch;
            }
            .article-card-row .article-thumb {
                width: 100%;
                height: 160px;
            }
            .cta-section-kaiyun {
                padding: 30px 18px;
                border-radius: var(--radius-lg);
            }
            .cta-section-kaiyun h3 {
                font-size: 1.3rem;
            }
            .btn-cta-kaiyun {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.45rem;
            }
            .page-banner .banner-label {
                font-size: 0.75rem;
                padding: 4px 12px;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .card-kaiyun .card-body-custom {
                padding: 16px 14px 18px;
            }
            .navbar-brand-kaiyun {
                font-size: 1.05rem;
            }
            .btn-cta-nav {
                font-size: 0.8rem;
                padding: 7px 13px;
            }
        }