/* roulang page: index */
:root {
            --primary-700: #4C2D7A;
            --primary-600: #5B3590;
            --primary-500: #6B3FA0;
            --primary-400: #8B5FBF;
            --primary-300: #AB7FDF;
            --secondary-500: #3B82F6;
            --secondary-400: #6B9FF8;
            --secondary-300: #9BBFFA;
            --accent: #F59E0B;
            --accent-light: #FCD34D;
            --bg-light: #F8F9FC;
            --bg-white: #FFFFFF;
            --text-primary: #1A1A2E;
            --text-secondary: #6B7280;
            --text-light: #9CA3AF;
            --border-light: #E5E7EB;
            --border-focus: #6B3FA0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.5s ease;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 1.5rem;
            --space-lg: 2rem;
            --space-xl: 3rem;
            --space-2xl: 4rem;
            --space-3xl: 6rem;
            --max-width: 1200px;
            --header-brand-height: 64px;
            --header-nav-height: 48px;
            --header-total: 112px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-500);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-400);
        }
        a:focus-visible {
            outline: 2px solid var(--primary-500);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        p {
            margin: 0 0 1rem;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        .container-fluid {
            width: 100%;
            padding: 0 var(--space-md);
        }
        .section-padding {
            padding: var(--space-2xl) 0;
        }
        .section-padding-sm {
            padding: var(--space-xl) 0;
        }
        .section-padding-lg {
            padding: var(--space-3xl) 0;
        }
        .text-center {
            text-align: center;
        }
        .text-secondary {
            color: var(--text-secondary);
        }
        .mb-sm {
            margin-bottom: var(--space-sm);
        }
        .mb-md {
            margin-bottom: var(--space-md);
        }
        .mb-lg {
            margin-bottom: var(--space-lg);
        }
        .mb-xl {
            margin-bottom: var(--space-xl);
        }
        .mt-sm {
            margin-top: var(--space-sm);
        }
        .mt-md {
            margin-top: var(--space-md);
        }
        .mt-lg {
            margin-top: var(--space-lg);
        }
        .mt-xl {
            margin-top: var(--space-xl);
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: var(--space-lg);
            text-align: center;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 680px;
            margin: 0 auto var(--space-xl);
            line-height: 1.7;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            line-height: 1.4;
            border: 2px solid transparent;
            transition: all var(--transition-normal);
            text-decoration: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
            color: #fff;
            border-color: transparent;
            box-shadow: 0 4px 16px rgba(107, 63, 160, 0.3);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(107, 63, 160, 0.4);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(107, 63, 160, 0.3);
        }
        .btn-secondary {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-outline-primary {
            background: transparent;
            color: var(--primary-500);
            border-color: var(--primary-500);
        }
        .btn-outline-primary:hover {
            background: var(--primary-500);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(107, 63, 160, 0.25);
        }
        .btn-outline-primary:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 18px 40px;
            font-size: 1.1rem;
            border-radius: var(--radius-lg);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.875rem;
            border-radius: var(--radius-sm);
        }
        .btn-block {
            width: 100%;
        }
        .btn .fa-solid,
        .btn .fa-regular,
        .btn .fa-brands {
            font-size: 1.1em;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            font-weight: 600;
            background: var(--primary-500);
            color: #fff;
            line-height: 1.4;
        }
        .badge-accent {
            background: var(--accent);
            color: #1A1A2E;
        }
        .badge-outline {
            background: transparent;
            border: 1.5px solid var(--primary-500);
            color: var(--primary-500);
        }
        .badge-sm {
            padding: 4px 10px;
            font-size: 0.75rem;
        }

        .tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--text-secondary);
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
        }
        .tag:hover {
            border-color: var(--primary-300);
            color: var(--primary-500);
        }
        .tag-primary {
            background: rgba(107, 63, 160, 0.1);
            color: var(--primary-500);
            border-color: transparent;
        }
        .tag-accent {
            background: rgba(245, 158, 11, 0.12);
            color: #B45309;
            border-color: transparent;
        }

        .card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: var(--space-lg);
            transition: all var(--transition-normal);
            border: 1px solid rgba(0, 0, 0, 0.02);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .card-sm {
            padding: var(--space-md);
        }
        .card-lg {
            padding: var(--space-xl);
        }

        .star-rating {
            display: inline-flex;
            gap: 2px;
            color: var(--accent);
            font-size: 1rem;
        }
        .star-rating .star-empty {
            color: var(--border-light);
        }

        .header-wrap {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            transition: background var(--transition-normal), box-shadow var(--transition-normal);
        }
        .header-wrap.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .header-wrap.scrolled .brand-text,
        .header-wrap.scrolled .nav-channel a {
            color: var(--text-primary);
        }
        .header-wrap.scrolled .nav-channel a::after {
            background: var(--primary-500);
        }

        .header-brand {
            height: var(--header-brand-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 var(--space-md);
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .brand-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            transition: color var(--transition-normal);
            white-space: nowrap;
        }
        .header-wrap.scrolled .brand-text {
            color: var(--text-primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .header-actions .search-toggle,
        .header-actions .lang-toggle {
            color: rgba(255, 255, 255, 0.8);
            background: none;
            border: none;
            font-size: 1.2rem;
            padding: 6px;
            border-radius: 50%;
            transition: all var(--transition-fast);
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .header-wrap.scrolled .header-actions .search-toggle,
        .header-wrap.scrolled .header-actions .lang-toggle {
            color: var(--text-secondary);
        }
        .header-actions .search-toggle:hover,
        .header-actions .lang-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }
        .header-wrap.scrolled .header-actions .search-toggle:hover,
        .header-wrap.scrolled .header-actions .lang-toggle:hover {
            background: var(--bg-light);
            color: var(--text-primary);
        }

        .nav-channel-wrap {
            height: var(--header-nav-height);
            display: flex;
            align-items: center;
            justify-content: center;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        .header-wrap.scrolled .nav-channel-wrap {
            border-top-color: var(--border-light);
        }
        .nav-channel {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
            justify-content: center;
        }
        .nav-channel a {
            display: inline-block;
            padding: 6px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            border-radius: 20px;
            transition: all var(--transition-fast);
            position: relative;
            text-decoration: none;
        }
        .header-wrap.scrolled .nav-channel a {
            color: var(--text-secondary);
        }
        .nav-channel a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
        }
        .header-wrap.scrolled .nav-channel a:hover {
            color: var(--primary-500);
            background: rgba(107, 63, 160, 0.06);
        }
        .nav-channel a.active {
            color: #fff;
            font-weight: 600;
        }
        .header-wrap.scrolled .nav-channel a.active {
            color: var(--primary-500);
        }
        .nav-channel a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: #fff;
            border-radius: 2px;
        }
        .header-wrap.scrolled .nav-channel a.active::after {
            background: var(--primary-500);
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: #fff;
            padding: 6px;
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .header-wrap.scrolled .hamburger {
            color: var(--text-primary);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-total);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            padding: var(--space-md);
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            z-index: 999;
            max-height: calc(100vh - var(--header-total));
            overflow-y: auto;
        }
        .mobile-nav.open {
            display: block;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            text-decoration: none;
        }
        .mobile-nav a:hover {
            background: var(--bg-light);
            color: var(--primary-500);
        }
        .mobile-nav a.active {
            color: var(--primary-500);
            background: rgba(107, 63, 160, 0.06);
            font-weight: 600;
        }

        .hero-section {
            padding: calc(var(--header-total) + var(--space-xl)) 0 var(--space-2xl);
            background: linear-gradient(135deg, #2D1B4E 0%, #1A1A2E 40%, #0F1B3D 70%, #1A2A4A 100%);
            position: relative;
            overflow: hidden;
            min-height: 80vh;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(107, 63, 160, 0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 30%, rgba(59, 130, 246, 0.2) 0%, transparent 50%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-text {
            max-width: 640px;
        }
        .hero-text h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: var(--space-md);
            letter-spacing: -0.5px;
        }
        .hero-text .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: var(--space-lg);
            line-height: 1.6;
            max-width: 520px;
        }
        .hero-text .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            margin-bottom: var(--space-lg);
        }
        .hero-text .hero-badges .badge {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #fff;
            font-weight: 500;
            font-size: 0.85rem;
        }
        .hero-text .hero-badges .badge .fa-solid {
            color: var(--accent);
        }
        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            margin-top: var(--space-md);
        }
        .hero-visual {
            position: relative;
            z-index: 2;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-visual .hero-img-wrap {
            max-width: 440px;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(255, 255, 255, 0.05);
        }
        .hero-visual .hero-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
        }

        .features-grid .feature-card {
            text-align: center;
            padding: var(--space-xl) var(--space-lg);
        }
        .features-grid .feature-card .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(107, 63, 160, 0.1), rgba(59, 130, 246, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-md);
            font-size: 1.8rem;
            color: var(--primary-500);
            transition: all var(--transition-normal);
        }
        .features-grid .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
            color: #fff;
            transform: scale(1.05);
        }
        .features-grid .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: var(--space-xs);
        }
        .features-grid .feature-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        .screenshot-carousel {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            box-shadow: var(--shadow-md);
            position: relative;
        }
        .screenshot-carousel .orbit {
            position: relative;
        }
        .screenshot-carousel .orbit-container {
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .screenshot-carousel .orbit-slide img {
            width: 100%;
            height: auto;
            border-radius: var(--radius-sm);
        }
        .screenshot-carousel .orbit-bullets {
            margin-top: var(--space-sm);
            text-align: center;
        }
        .screenshot-carousel .orbit-bullets button {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--border-light);
            border: none;
            margin: 0 4px;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .screenshot-carousel .orbit-bullets button.is-active {
            background: var(--primary-500);
            width: 28px;
            border-radius: 5px;
        }
        .screenshot-carousel .orbit-previous,
        .screenshot-carousel .orbit-next {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.9);
            border: none;
            box-shadow: var(--shadow-md);
            color: var(--text-primary);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            cursor: pointer;
            z-index: 10;
        }
        .screenshot-carousel .orbit-previous:hover,
        .screenshot-carousel .orbit-next:hover {
            background: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-50%) scale(1.05);
        }
        .screenshot-carousel .orbit-previous {
            left: -18px;
        }
        .screenshot-carousel .orbit-next {
            right: -18px;
        }

        .system-req .req-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--space-md);
        }
        .system-req .req-item {
            text-align: center;
            padding: var(--space-lg);
            border-radius: var(--radius-md);
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-normal);
        }
        .system-req .req-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .system-req .req-item .req-icon {
            font-size: 2rem;
            color: var(--primary-500);
            margin-bottom: var(--space-sm);
        }
        .system-req .req-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: var(--space-xs);
        }
        .system-req .req-item .req-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: var(--space-sm);
        }
        .system-req .req-item .badge-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            justify-content: center;
        }

        .testimonials .testimonial-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-normal);
            position: relative;
        }
        .testimonials .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .testimonials .testimonial-card .quote-icon {
            color: var(--primary-200);
            font-size: 2rem;
            opacity: 0.3;
            position: absolute;
            top: 16px;
            right: 20px;
        }
        .testimonials .testimonial-card .user-info {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            margin-bottom: var(--space-sm);
        }
        .testimonials .testimonial-card .user-info .avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-300), var(--secondary-300));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.4rem;
            flex-shrink: 0;
        }
        .testimonials .testimonial-card .user-info .user-name {
            font-weight: 600;
            font-size: 1rem;
        }
        .testimonials .testimonial-card .user-info .user-title {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .testimonials .testimonial-card .testimonial-text {
            font-size: 0.95rem;
            color: var(--text-primary);
            line-height: 1.7;
            font-style: italic;
            margin-bottom: var(--space-sm);
        }
        .testimonials .testimonial-card .star-rating {
            font-size: 0.9rem;
        }

        .download-section {
            background: linear-gradient(135deg, #1A1A2E 0%, #2D1B4E 50%, #1A2A4A 100%);
            position: relative;
            overflow: hidden;
        }
        .download-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .download-section .container {
            position: relative;
            z-index: 2;
        }
        .download-section .section-title,
        .download-section .section-subtitle {
            color: #fff;
        }
        .download-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .download-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }
        .download-buttons .btn-download {
            min-width: 220px;
            padding: 18px 32px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.08);
            border: 1.5px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            transition: all var(--transition-normal);
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
        }
        .download-buttons .btn-download .dl-icon {
            font-size: 1.8rem;
            flex-shrink: 0;
        }
        .download-buttons .btn-download .dl-text {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            line-height: 1.3;
        }
        .download-buttons .btn-download .dl-text small {
            font-size: 0.7rem;
            font-weight: 400;
            opacity: 0.7;
        }
        .download-buttons .btn-download:hover {
            background: var(--primary-500);
            border-color: var(--primary-500);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(107, 63, 160, 0.35);
        }
        .download-buttons .btn-download-primary {
            background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
            border-color: transparent;
            box-shadow: 0 8px 24px rgba(107, 63, 160, 0.3);
        }
        .download-buttons .btn-download-primary:hover {
            box-shadow: 0 12px 36px rgba(107, 63, 160, 0.45);
            transform: translateY(-3px);
        }
        .download-info {
            text-align: center;
            margin-top: var(--space-md);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .news-list .news-card {
            display: flex;
            gap: var(--space-md);
            padding: var(--space-md);
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-normal);
            align-items: flex-start;
        }
        .news-list .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .news-list .news-card .news-thumb {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-light);
        }
        .news-list .news-card .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-list .news-card .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-list .news-card .news-body .news-tag {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 600;
            background: rgba(107, 63, 160, 0.1);
            color: var(--primary-500);
            margin-bottom: 6px;
        }
        .news-list .news-card .news-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-list .news-card .news-body .news-excerpt {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .news-list .news-card .news-body .news-meta {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .news-list .news-card .news-body .news-meta .news-link {
            color: var(--primary-500);
            font-weight: 500;
            font-size: 0.85rem;
        }
        .news-list .news-card .news-body .news-meta .news-link:hover {
            color: var(--primary-400);
        }
        .news-empty {
            text-align: center;
            padding: var(--space-xl) var(--space-md);
            color: var(--text-light);
            font-size: 1.05rem;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-light);
        }
        .news-empty .fa-solid {
            font-size: 2.5rem;
            color: var(--border-light);
            margin-bottom: var(--space-sm);
            display: block;
        }

        .footer {
            background: #1A1A2E;
            color: rgba(255, 255, 255, 0.8);
            padding: var(--space-2xl) 0 var(--space-lg);
        }
        .footer a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition-fast);
        }
        .footer a:hover {
            color: #fff;
        }
        .footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: var(--space-sm);
        }
        .footer .footer-brand .brand-icon {
            width: 32px;
            height: 32px;
            font-size: 1rem;
        }
        .footer .footer-brand .brand-text {
            font-size: 1.1rem;
            color: #fff;
        }
        .footer .footer-desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            line-height: 1.6;
        }
        .footer .footer-social {
            display: flex;
            gap: var(--space-sm);
            margin-top: var(--space-sm);
        }
        .footer .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .footer .footer-social a:hover {
            background: var(--primary-500);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer .footer-links h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: var(--space-sm);
        }
        .footer .footer-links ul li {
            margin-bottom: 6px;
        }
        .footer .footer-links ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer .footer-links ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer .footer-contact h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: var(--space-sm);
        }
        .footer .footer-contact p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 4px;
        }
        .footer .footer-contact p .fa-solid {
            width: 20px;
            color: var(--primary-300);
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: var(--space-xl);
            padding-top: var(--space-md);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: var(--space-sm);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer .footer-bottom a:hover {
            color: #fff;
        }
        .footer .back-to-top {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            cursor: pointer;
            transition: color var(--transition-fast);
            background: none;
            border: none;
            padding: 6px 12px;
        }
        .footer .back-to-top:hover {
            color: #fff;
        }

        @media screen and (max-width: 1023px) {
            .hero-text h1 {
                font-size: 2.2rem;
            }
            .hero-text .hero-sub {
                font-size: 1.05rem;
            }
            .hero-section {
                min-height: auto;
                padding: calc(var(--header-total) + var(--space-lg)) 0 var(--space-xl);
            }
            .hero-visual {
                margin-top: var(--space-lg);
            }
            .hero-visual .hero-img-wrap {
                max-width: 360px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .features-grid .feature-card {
                padding: var(--space-lg) var(--space-md);
            }
        }

        @media screen and (max-width: 767px) {
            .header-brand {
                height: 56px;
                padding: 0 var(--space-sm);
            }
            .header-wrap .nav-channel-wrap {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .header-actions .search-toggle,
            .header-actions .lang-toggle {
                display: none;
            }
            .brand-text {
                font-size: 1.1rem;
            }
            .mobile-nav {
                top: 56px;
            }
            :root {
                --header-total: 56px;
            }

            .hero-text h1 {
                font-size: 1.8rem;
            }
            .hero-text .hero-sub {
                font-size: 0.95rem;
            }
            .hero-section {
                padding: calc(var(--header-total) + var(--space-md)) 0 var(--space-lg);
            }
            .hero-cta {
                flex-direction: column;
                width: 100%;
            }
            .hero-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-visual .hero-img-wrap {
                max-width: 300px;
            }

            .section-padding {
                padding: var(--space-xl) 0;
            }
            .section-padding-lg {
                padding: var(--space-2xl) 0;
            }
            .section-title {
                font-size: 1.3rem;
                margin-bottom: var(--space-md);
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: var(--space-lg);
            }

            .features-grid .feature-card {
                padding: var(--space-md);
            }

            .screenshot-carousel {
                padding: var(--space-md);
            }
            .screenshot-carousel .orbit-previous,
            .screenshot-carousel .orbit-next {
                width: 36px;
                height: 36px;
                font-size: 0.9rem;
            }
            .screenshot-carousel .orbit-previous {
                left: -10px;
            }
            .screenshot-carousel .orbit-next {
                right: -10px;
            }

            .system-req .req-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-sm);
            }
            .system-req .req-item {
                padding: var(--space-md);
            }

            .testimonials .testimonial-card {
                padding: var(--space-md);
            }

            .download-buttons {
                flex-direction: column;
                align-items: center;
            }
            .download-buttons .btn-download {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }

            .news-list .news-card {
                flex-direction: column;
                padding: var(--space-sm);
            }
            .news-list .news-card .news-thumb {
                width: 100%;
                height: 140px;
            }

            .footer .footer-links,
            .footer .footer-contact {
                margin-top: var(--space-lg);
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media screen and (max-width: 519px) {
            .hero-text h1 {
                font-size: 1.5rem;
            }
            .hero-text .hero-sub {
                font-size: 0.9rem;
            }
            .hero-visual .hero-img-wrap {
                max-width: 240px;
            }
            .system-req .req-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.15rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
            .download-buttons .btn-download {
                min-width: unset;
                padding: 14px 24px;
                font-size: 0.9rem;
            }
            .news-list .news-card .news-thumb {
                height: 100px;
            }
        }

        .foundation-fix .grid-container {
            max-width: var(--max-width);
            padding-left: var(--space-md);
            padding-right: var(--space-md);
        }
        .foundation-fix .grid-x {
            margin-left: -0.5rem;
            margin-right: -0.5rem;
        }
        .foundation-fix .cell {
            padding-left: 0.5rem;
            padding-right: 0.5rem;
        }
        .foundation-fix .grid-margin-x {
            margin-left: -0.5rem;
            margin-right: -0.5rem;
        }
        .foundation-fix .grid-margin-x>.cell {
            padding-left: 0.5rem;
            padding-right: 0.5rem;
        }
        .foundation-fix .grid-padding-x {
            padding-left: 0.5rem;
            padding-right: 0.5rem;
        }
        .foundation-fix .grid-padding-x>.cell {
            padding-left: 0.5rem;
            padding-right: 0.5rem;
        }

        .faq-accordion .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: var(--space-sm);
            overflow: hidden;
            background: var(--bg-white);
            transition: box-shadow var(--transition-fast);
        }
        .faq-accordion .accordion-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-accordion .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-md) var(--space-lg);
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: var(--bg-white);
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition-fast);
            gap: var(--space-sm);
        }
        .faq-accordion .accordion-title:hover {
            background: var(--bg-light);
        }
        .faq-accordion .accordion-title .fa-solid {
            color: var(--primary-400);
            font-size: 0.9rem;
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-accordion .accordion-title[aria-expanded="true"] .fa-solid {
            transform: rotate(45deg);
        }
        .faq-accordion .accordion-content {
            padding: 0 var(--space-lg) var(--space-md);
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-accordion .accordion-content p:last-child {
            margin-bottom: 0;
        }

        .about-brief {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .about-brief h3 {
            font-size: 1.25rem;
            margin-bottom: var(--space-sm);
        }
        .about-brief p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .about-brief .about-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }
        .about-brief .about-stats .stat-item {
            text-align: center;
            padding: var(--space-md);
            border-radius: var(--radius-md);
            background: var(--bg-light);
        }
        .about-brief .about-stats .stat-item .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-500);
            line-height: 1.2;
        }
        .about-brief .about-stats .stat-item .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .cta-simple {
            background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
            border-radius: var(--radius-xl);
            padding: var(--space-xl) var(--space-lg);
            text-align: center;
            color: #fff;
            box-shadow: 0 8px 32px rgba(107, 63, 160, 0.25);
        }
        .cta-simple h3 {
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: var(--space-sm);
        }
        .cta-simple p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto var(--space-md);
        }
        .cta-simple .btn {
            background: #fff;
            color: var(--primary-500);
            border: none;
        }
        .cta-simple .btn:hover {
            background: var(--accent-light);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        .img-placeholder {
            background: linear-gradient(135deg, var(--bg-light), var(--border-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 0.9rem;
            min-height: 80px;
        }

/* roulang page: article */
/* ===== CSS Variables ===== */
    :root {
        --primary-violet: #6B3FA0;
        --primary-indigo: #3B82F6;
        --primary-gradient: linear-gradient(135deg, #6B3FA0 0%, #3B82F6 100%);
        --accent-gold: #F59E0B;
        --bg-light: #F8F9FC;
        --bg-white: #FFFFFF;
        --text-dark: #1A1A2E;
        --text-muted: #6B7280;
        --border-light: #E5E7EB;
        --radius-card: 16px;
        --radius-btn: 12px;
        --radius-badge: 8px;
        --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
        --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.12);
        --shadow-nav: 0 2px 16px rgba(0,0,0,0.08);
        --space-xs: 0.5rem;
        --space-sm: 1rem;
        --space-md: 2rem;
        --space-lg: 3rem;
        --space-xl: 4rem;
        --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        --transition: 0.3s ease;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font-stack);
        font-size: 1rem;
        line-height: 1.7;
        color: var(--text-dark);
        background: var(--bg-light);
        -webkit-font-smoothing: antialiased;
    }
    a { color: var(--primary-indigo); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--primary-violet); }
    img { max-width: 100%; height: auto; display: block; }
    ul, ol { list-style: none; padding: 0; margin: 0; }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-dark); }

    /* ===== Container ===== */
    .container { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }

    /* ===== Header & Navigation ===== */
    .site-header {
        background: var(--bg-white);
        box-shadow: var(--shadow-nav);
        position: sticky;
        top: 0;
        z-index: 100;
        transition: background var(--transition), box-shadow var(--transition);
    }
    .site-header.scrolled {
        background: rgba(255,255,255,0.97);
        backdrop-filter: blur(8px);
    }
    .header-inner {
        display: flex;
        flex-direction: column;
        padding: 0.6rem 0 0.4rem;
    }
    .brand-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-bottom: 0.4rem;
    }
    .brand {
        display: flex;
        align-items: center;
        gap: 0.6rem;
        font-size: 1.35rem;
        font-weight: 700;
        color: var(--text-dark);
    }
    .brand-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        background: var(--primary-gradient);
        color: #fff;
        border-radius: 10px;
        font-size: 1rem;
        font-weight: 800;
        letter-spacing: 1px;
    }
    .brand-text { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .brand-row .brand-actions { display: flex; align-items: center; gap: 0.8rem; }
    .brand-actions a { color: var(--text-muted); font-size: 1.1rem; transition: color var(--transition); }
    .brand-actions a:hover { color: var(--primary-indigo); }

    .nav-channel {
        display: flex;
        flex-wrap: wrap;
        gap: 0.25rem;
        padding-top: 0.3rem;
        border-top: 1px solid var(--border-light);
    }
    .nav-channel a {
        display: inline-block;
        padding: 0.4rem 1rem;
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text-muted);
        border-radius: 20px;
        transition: background var(--transition), color var(--transition);
    }
    .nav-channel a:hover { background: rgba(107,63,160,0.08); color: var(--primary-violet); }
    .nav-channel a.active, .nav-channel a[aria-current="page"] {
        background: var(--primary-gradient);
        color: #fff;
        font-weight: 600;
        box-shadow: 0 2px 8px rgba(107,63,160,0.25);
    }

    /* ===== Breadcrumb ===== */
    .breadcrumb {
        padding: 1rem 0 0.5rem;
        font-size: 0.85rem;
        color: var(--text-muted);
    }
    .breadcrumb a { color: var(--text-muted); }
    .breadcrumb a:hover { color: var(--primary-indigo); }
    .breadcrumb span.sep { margin: 0 0.4rem; color: #bbb; }

    /* ===== Article Hero ===== */
    .article-hero {
        background: var(--bg-white);
        padding: var(--space-lg) 0 var(--space-md);
        border-bottom: 1px solid var(--border-light);
    }
    .article-hero h1 {
        font-size: 2.2rem;
        font-weight: 800;
        line-height: 1.3;
        margin-bottom: var(--space-sm);
        color: var(--text-dark);
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 0.8rem 1.5rem;
        font-size: 0.9rem;
        color: var(--text-muted);
        margin-bottom: 0;
    }
    .article-meta .category-tag {
        background: rgba(107,63,160,0.12);
        color: var(--primary-violet);
        padding: 0.2rem 0.8rem;
        border-radius: var(--radius-badge);
        font-weight: 600;
        font-size: 0.8rem;
    }
    .article-meta i { margin-right: 0.3rem; color: var(--primary-indigo); }

    /* ===== Article Body ===== */
    .article-body-wrap {
        padding: var(--space-lg) 0;
    }
    .article-content {
        max-width: 800px;
        margin: 0 auto;
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 2.5rem 2.8rem;
    }
    .article-content h2 { font-size: 1.75rem; margin: 2rem 0 1rem; color: var(--text-dark); border-left: 4px solid var(--primary-violet); padding-left: 1rem; }
    .article-content h3 { font-size: 1.35rem; margin: 1.6rem 0 0.8rem; color: var(--text-dark); }
    .article-content p { margin-bottom: 1.2rem; color: #2d2d44; }
    .article-content blockquote {
        border-left: 4px solid var(--primary-indigo);
        background: rgba(59,130,246,0.06);
        padding: 1rem 1.5rem;
        margin: 1.5rem 0;
        border-radius: 0 8px 8px 0;
        color: var(--text-muted);
        font-style: normal;
    }
    .article-content ul, .article-content ol { margin: 1rem 0 1.2rem 1.5rem; list-style: disc; }
    .article-content ol { list-style: decimal; }
    .article-content li { margin-bottom: 0.4rem; color: #2d2d44; }
    .article-content img { border-radius: 12px; margin: 1.5rem auto; box-shadow: var(--shadow-card); }
    .article-content figcaption, .article-content .img-caption { text-align: center; font-size: 0.85rem; color: var(--text-muted); margin-top: -0.8rem; margin-bottom: 1.5rem; }
    .article-content code {
        background: #f0f0f5;
        padding: 0.2rem 0.5rem;
        border-radius: 4px;
        font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
        font-size: 0.9em;
        color: #d63384;
    }
    .article-content pre {
        background: #f0f0f5;
        padding: 1.2rem 1.5rem;
        border-radius: 10px;
        overflow-x: auto;
        margin: 1.5rem 0;
        font-size: 0.9rem;
        line-height: 1.6;
        border: 1px solid var(--border-light);
    }
    .article-content pre code { background: none; padding: 0; color: inherit; }
    .article-content a { color: var(--primary-indigo); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
    .article-content a:hover { color: var(--primary-violet); }

    /* ===== Related ===== */
    .related-section {
        padding: var(--space-lg) 0 var(--space-xl);
        background: var(--bg-light);
    }
    .related-section h2 {
        font-size: 1.6rem;
        font-weight: 700;
        margin-bottom: var(--space-md);
        text-align: center;
        color: var(--text-dark);
        position: relative;
    }
    .related-section h2::after {
        content: '';
        display: block;
        width: 60px;
        height: 3px;
        background: var(--primary-gradient);
        margin: 0.6rem auto 0;
        border-radius: 3px;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
        max-width: 1000px;
        margin: 0 auto;
    }
    .related-card {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        transition: transform var(--transition), box-shadow var(--transition);
        display: flex;
        flex-direction: column;
    }
    .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
    .related-card img {
        width: 100%;
        height: 160px;
        object-fit: cover;
        border-bottom: 1px solid var(--border-light);
    }
    .related-card .card-body { padding: 1.2rem 1.4rem 1.4rem; flex: 1; display: flex; flex-direction: column; }
    .related-card .card-body h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text-dark); }
    .related-card .card-body p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.5; flex: 1; margin-bottom: 0.8rem; }
    .related-card .card-body .read-more {
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--primary-indigo);
        display: inline-flex;
        align-items: center;
        gap: 0.3rem;
        transition: gap var(--transition);
    }
    .related-card .card-body .read-more:hover { gap: 0.6rem; color: var(--primary-violet); }

    /* ===== Not Found ===== */
    .not-found-wrap {
        max-width: 600px;
        margin: var(--space-xl) auto;
        text-align: center;
        padding: var(--space-lg) var(--space-md);
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
    }
    .not-found-wrap i { font-size: 3rem; color: var(--text-muted); margin-bottom: var(--space-sm); }
    .not-found-wrap h2 { font-size: 1.5rem; margin-bottom: var(--space-sm); }
    .not-found-wrap p { color: var(--text-muted); margin-bottom: var(--space-md); }
    .not-found-wrap .btn-home {
        display: inline-block;
        padding: 0.7rem 2rem;
        background: var(--primary-gradient);
        color: #fff;
        border-radius: var(--radius-btn);
        font-weight: 600;
        transition: opacity var(--transition), transform var(--transition);
    }
    .not-found-wrap .btn-home:hover { opacity: 0.92; transform: translateY(-2px); color: #fff; }

    /* ===== Footer ===== */
    .footer {
        background: #1A1A2E;
        color: rgba(255,255,255,0.85);
        padding: var(--space-xl) 0 var(--space-md);
        margin-top: 0;
    }
    .footer .brand { color: #fff; margin-bottom: var(--space-sm); }
    .footer .brand-icon { width: 34px; height: 34px; font-size: 0.9rem; }
    .footer .brand-text { -webkit-text-fill-color: #fff; background: none; }
    .footer-desc { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; margin-bottom: var(--space-sm); max-width: 360px; }
    .footer-social { display: flex; gap: 0.8rem; font-size: 1.2rem; }
    .footer-social a { color: rgba(255,255,255,0.6); transition: color var(--transition); }
    .footer-social a:hover { color: var(--accent-gold); }
    .footer-links h5 { color: #fff; font-size: 1rem; margin-bottom: 0.8rem; font-weight: 600; }
    .footer-links ul li { margin-bottom: 0.4rem; }
    .footer-links a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: color var(--transition); }
    .footer-links a:hover { color: var(--accent-gold); }
    .footer-contact h5 { color: #fff; font-size: 1rem; margin-bottom: 0.8rem; font-weight: 600; }
    .footer-contact p { color: rgba(255,255,255,0.55); font-size: 0.9rem; margin-bottom: 0.3rem; }
    .footer-contact i { margin-right: 0.4rem; color: var(--accent-gold); width: 1.2rem; text-align: center; }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.1);
        margin-top: var(--space-lg);
        padding-top: var(--space-md);
        text-align: center;
        font-size: 0.82rem;
        color: rgba(255,255,255,0.35);
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem 1.5rem;
    }
    .footer-bottom a { color: rgba(255,255,255,0.4); }
    .footer-bottom a:hover { color: var(--accent-gold); }
    .back-to-top {
        position: fixed;
        bottom: 2rem;
        right: 2rem;
        width: 44px;
        height: 44px;
        background: var(--primary-gradient);
        color: #fff;
        border: none;
        border-radius: 50%;
        font-size: 1.2rem;
        cursor: pointer;
        box-shadow: 0 4px 14px rgba(107,63,160,0.35);
        transition: opacity var(--transition), transform var(--transition);
        opacity: 0;
        transform: translateY(20px);
        pointer-events: none;
        z-index: 99;
    }
    .back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
    .back-to-top:hover { transform: translateY(-4px); opacity: 0.9; }

    /* ===== Responsive ===== */
    @media screen and (max-width: 1023px) {
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .article-hero h1 { font-size: 1.9rem; }
        .article-content { padding: 2rem 1.8rem; }
    }
    @media screen and (max-width: 767px) {
        .header-inner { padding: 0.4rem 0; }
        .brand { font-size: 1.1rem; }
        .brand-icon { width: 32px; height: 32px; font-size: 0.8rem; }
        .nav-channel { gap: 0.2rem; padding-top: 0.2rem; }
        .nav-channel a { font-size: 0.82rem; padding: 0.3rem 0.7rem; }
        .brand-actions a { font-size: 0.95rem; }
        .article-hero { padding: var(--space-md) 0; }
        .article-hero h1 { font-size: 1.5rem; }
        .article-meta { font-size: 0.8rem; gap: 0.5rem 1rem; }
        .article-content { padding: 1.5rem 1.2rem; border-radius: 12px; }
        .article-content h2 { font-size: 1.35rem; }
        .article-content h3 { font-size: 1.1rem; }
        .related-grid { grid-template-columns: 1fr; max-width: 480px; }
        .related-card img { height: 140px; }
        .breadcrumb { font-size: 0.78rem; }
        .footer { padding: var(--space-lg) 0 var(--space-md); }
        .footer .cell { margin-bottom: var(--space-md); }
        .back-to-top { bottom: 1.2rem; right: 1.2rem; width: 38px; height: 38px; font-size: 1rem; }
    }
    @media screen and (max-width: 520px) {
        .article-hero h1 { font-size: 1.3rem; }
        .article-content { padding: 1.2rem 1rem; }
        .nav-channel a { font-size: 0.75rem; padding: 0.25rem 0.55rem; }
        .brand { font-size: 1rem; }
        .brand-icon { width: 28px; height: 28px; font-size: 0.7rem; }
    }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --color-primary: #6B3FA0;
            --color-primary-dark: #5A2F8A;
            --color-secondary: #3B82F6;
            --color-accent: #F59E0B;
            --color-bg: #F8F9FC;
            --color-white: #FFFFFF;
            --color-text: #1A1A2E;
            --color-text-muted: #6B7280;
            --color-border: #E5E7EB;
            --color-footer-bg: #1A1A2E;
            --color-footer-text: rgba(255,255,255,0.85);

            --font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 1.5rem;
            --space-lg: 2rem;
            --space-xl: 3rem;
            --space-2xl: 4rem;
            --space-3xl: 5rem;

            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;

            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.15);

            --transition: 0.3s ease;

            --max-width: 1200px;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        html { scroll-behavior: smooth; font-size: 16px; }

        body {
            font-family: var(--font-family);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a { color: var(--color-secondary); text-decoration: none; transition: var(--transition); }
        a:hover, a:focus { color: var(--color-primary); }

        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--color-text); }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
        }

        .section { padding: var(--space-3xl) 0; }
        .section-title {
            font-size: 2rem;
            text-align: center;
            margin-bottom: var(--space-sm);
            color: var(--color-text);
        }
        .section-subtitle {
            font-size: 1.125rem;
            text-align: center;
            color: var(--color-text-muted);
            margin-bottom: var(--space-xl);
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.04);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(255,255,255,0.98);
            box-shadow: 0 2px 30px rgba(0,0,0,0.08);
        }
        .header-inner {
            display: flex;
            flex-direction: column;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-xs) 0;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text);
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 800;
            letter-spacing: 0.5px;
        }
        .brand-text { color: var(--color-text); }
        .brand-row-right {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .brand-row-right a {
            color: var(--color-text-muted);
            font-size: 1.1rem;
        }
        .brand-row-right a:hover { color: var(--color-primary); }

        .nav-channel {
            display: flex;
            gap: var(--space-xs);
            padding: var(--space-xs) 0 var(--space-sm) 0;
            flex-wrap: wrap;
        }
        .nav-channel a {
            padding: 0.4rem 1.2rem;
            border-radius: 100px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-muted);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-channel a:hover {
            color: var(--color-primary);
            background: rgba(107,63,160,0.06);
        }
        .nav-channel a.active {
            color: var(--color-white);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            box-shadow: 0 4px 15px rgba(107,63,160,0.3);
        }
        .nav-channel a.active:hover {
            color: var(--color-white);
            transform: translateY(-1px);
        }

        /* 移动端汉堡 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-text);
            cursor: pointer;
            padding: var(--space-xs);
        }

        /* ===== Hero ===== */
        .hero-feature {
            padding: 140px 0 var(--space-3xl) 0;
            background: linear-gradient(135deg, #6B3FA0 0%, #3B82F6 100%), url('/assets/images/backpic/back-1.png');
            background-blend-mode: overlay;
            background-size: cover;
            background-position: center;
            position: relative;
            color: var(--color-white);
            text-align: center;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .hero-feature::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0,0,0,0.15);
            pointer-events: none;
        }
        .hero-feature .container { position: relative; z-index: 1; }
        .hero-feature h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: var(--space-sm);
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .hero-feature .hero-desc {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.92);
            max-width: 680px;
            margin: 0 auto var(--space-lg) auto;
            line-height: 1.6;
        }
        .hero-feature .hero-badge {
            display: inline-block;
            padding: 0.35rem 1.2rem;
            border-radius: 100px;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: var(--space-md);
        }

        /* ===== 功能交替卡片 ===== */
        .feature-block {
            padding: var(--space-2xl) 0;
        }
        .feature-block:nth-child(even) {
            background: var(--color-white);
        }
        .feature-block-inner {
            display: flex;
            align-items: center;
            gap: var(--space-xl);
        }
        .feature-block-inner.reverse {
            flex-direction: row-reverse;
        }
        .feature-block-text {
            flex: 1;
        }
        .feature-block-text .tag {
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: 100px;
            background: rgba(107,63,160,0.1);
            color: var(--color-primary);
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: var(--space-sm);
        }
        .feature-block-text h2 {
            font-size: 1.8rem;
            margin-bottom: var(--space-sm);
            color: var(--color-text);
        }
        .feature-block-text p {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: var(--space-md);
        }
        .feature-block-text ul {
            display: grid;
            gap: var(--space-xs);
        }
        .feature-block-text ul li {
            display: flex;
            align-items: flex-start;
            gap: var(--space-xs);
            font-size: 0.95rem;
            color: var(--color-text);
        }
        .feature-block-text ul li i {
            color: var(--color-accent);
            margin-top: 0.25rem;
            flex-shrink: 0;
        }
        .feature-block-image {
            flex: 1;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--color-white);
            transition: var(--transition);
        }
        .feature-block-image:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .feature-block-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            padding: var(--space-2xl) 0;
        }
        .stats-section .stat-item {
            text-align: center;
            padding: var(--space-md);
        }
        .stats-section .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: var(--space-xs);
        }
        .stats-section .stat-label {
            font-size: 1rem;
            color: rgba(255,255,255,0.85);
            font-weight: 400;
        }

        /* ===== CTA 区域 ===== */
        .cta-section {
            background: var(--color-white);
            text-align: center;
            padding: var(--space-3xl) 0;
        }
        .cta-section h2 {
            font-size: 2rem;
            margin-bottom: var(--space-sm);
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--color-text-muted);
            margin-bottom: var(--space-lg);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-group {
            display: flex;
            gap: var(--space-md);
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: var(--space-xs);
            padding: 0.9rem 2.2rem;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            box-shadow: 0 4px 20px rgba(107,63,160,0.3);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(107,63,160,0.4);
            color: var(--color-white);
        }
        .btn-primary:focus {
            outline: 3px solid rgba(107,63,160,0.4);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-3px);
        }
        .btn-outline:focus {
            outline: 3px solid rgba(107,63,160,0.3);
            outline-offset: 2px;
        }
        .btn-lg {
            padding: 1rem 2.8rem;
            font-size: 1.1rem;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: var(--space-2xl) 0 var(--space-lg) 0;
        }
        .footer .footer-brand {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            margin-bottom: var(--space-sm);
        }
        .footer .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 0.9rem;
        }
        .footer .footer-brand .brand-text {
            color: var(--color-white);
            font-size: 1.3rem;
            font-weight: 700;
        }
        .footer-desc {
            color: rgba(255,255,255,0.6);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: var(--space-md);
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: var(--space-sm);
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-2px);
        }
        .footer-links h5 {
            color: var(--color-white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: var(--space-sm);
        }
        .footer-links ul li {
            margin-bottom: var(--space-xs);
        }
        .footer-links ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links ul li a:hover {
            color: var(--color-accent);
            padding-left: 4px;
        }
        .footer-contact p {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            margin-bottom: var(--space-xs);
            display: flex;
            align-items: center;
            gap: var(--space-xs);
        }
        .footer-contact p i { width: 20px; color: var(--color-accent); }
        .footer-bottom {
            margin-top: var(--space-xl);
            padding-top: var(--space-md);
            border-top: 1px solid rgba(255,255,255,0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--space-sm);
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--color-accent); }

        /* ===== 返回顶部 ===== */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            display: none;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(107,63,160,0.3);
            transition: var(--transition);
            z-index: 999;
        }
        .back-to-top.visible { display: flex; }
        .back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(107,63,160,0.4); }

        /* ===== 空态 ===== */
        .empty-state {
            text-align: center;
            padding: var(--space-2xl) var(--space-md);
            color: var(--color-text-muted);
        }
        .empty-state i { font-size: 3rem; margin-bottom: var(--space-sm); opacity: 0.4; }
        .empty-state p { font-size: 1.1rem; }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1024px) {
            .hero-feature h1 { font-size: 2.2rem; }
            .feature-block-inner {
                flex-direction: column !important;
                gap: var(--space-lg);
            }
            .feature-block-text, .feature-block-image { flex: none; width: 100%; }
            .feature-block-image { max-width: 100%; }
            .stats-section .stat-number { font-size: 2.2rem; }
        }

        @media screen and (max-width: 768px) {
            .brand-row { padding: var(--space-xs) 0; }
            .nav-channel {
                display: none;
                flex-direction: column;
                width: 100%;
                padding: var(--space-sm) 0;
                gap: var(--space-xs);
            }
            .nav-channel.open { display: flex; }
            .nav-channel a {
                padding: 0.6rem 1rem;
                border-radius: var(--radius-sm);
                white-space: normal;
            }
            .menu-toggle { display: block; }

            .hero-feature { min-height: 320px; padding: 120px 0 var(--space-xl) 0; }
            .hero-feature h1 { font-size: 1.8rem; }
            .hero-feature .hero-desc { font-size: 1rem; }

            .section-title { font-size: 1.6rem; }
            .feature-block-text h2 { font-size: 1.4rem; }
            .btn-lg { padding: 0.8rem 2rem; font-size: 1rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .back-to-top { bottom: 1.2rem; right: 1.2rem; width: 38px; height: 38px; font-size: 1rem; }
        }

        @media screen and (max-width: 520px) {
            :root { --space-3xl: 3rem; --space-2xl: 2.5rem; }
            .hero-feature h1 { font-size: 1.5rem; }
            .hero-feature .hero-desc { font-size: 0.92rem; }
            .section-title { font-size: 1.4rem; }
            .feature-block-text h2 { font-size: 1.2rem; }
            .btn-group { flex-direction: column; align-items: center; }
            .btn { width: 100%; justify-content: center; }
            .stats-section .stat-number { font-size: 1.8rem; }
        }

        /* ===== 辅助 ===== */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            border: 0;
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #6B3FA0;
            --color-primary-dark: #552f80;
            --color-secondary: #3B82F6;
            --color-accent: #F59E0B;
            --color-bg: #F8F9FC;
            --color-white: #FFFFFF;
            --color-text: #1A1A2E;
            --color-text-muted: #6B7280;
            --color-border: #E5E7EB;
            --color-footer-bg: #1A1A2E;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
            --transition: 0.3s ease;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 3rem;
            --space-xl: 4rem;
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.7;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.6rem 0;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .brand-row {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .brand-text span {
            color: var(--color-primary);
        }

        .nav-channel {
            display: flex;
            flex-wrap: wrap;
            gap: 0.25rem;
            background: rgba(107, 63, 160, 0.06);
            padding: 0.25rem;
            border-radius: var(--radius-md);
        }

        .nav-channel a {
            padding: 0.5rem 1.1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-channel a:hover {
            color: var(--color-primary);
            background: rgba(107, 63, 160, 0.08);
        }

        .nav-channel a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            box-shadow: 0 2px 10px rgba(107, 63, 160, 0.25);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .header-actions .search-toggle,
        .header-actions .lang-toggle {
            background: none;
            border: none;
            font-size: 1.1rem;
            color: var(--color-text-muted);
            cursor: pointer;
            transition: color var(--transition);
            padding: 0.3rem;
        }

        .header-actions .search-toggle:hover,
        .header-actions .lang-toggle:hover {
            color: var(--color-primary);
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-text);
            cursor: pointer;
            padding: 0.3rem;
        }

        /* ===== Hero ===== */
        .hero-faq {
            padding: 8rem 0 4rem;
            background: linear-gradient(135deg, rgba(107, 63, 160, 0.08), rgba(59, 130, 246, 0.06)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .hero-faq::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(107, 63, 160, 0.25), rgba(59, 130, 246, 0.15));
            backdrop-filter: blur(2px);
            -webkit-backdrop-filter: blur(2px);
        }

        .hero-faq .container {
            position: relative;
            z-index: 1;
        }

        .hero-faq h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        .hero-faq h1 span {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-faq .subtitle {
            font-size: 1.15rem;
            color: var(--color-text-muted);
            max-width: 640px;
            margin-bottom: 1.8rem;
            line-height: 1.8;
        }

        .hero-faq .hero-search-box {
            max-width: 520px;
            display: flex;
            gap: 0;
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            overflow: hidden;
        }

        .hero-faq .hero-search-box input {
            flex: 1;
            border: none;
            padding: 0.9rem 1.2rem;
            font-size: 0.95rem;
            font-family: var(--font-stack);
            outline: none;
            background: transparent;
        }

        .hero-faq .hero-search-box button {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border: none;
            padding: 0 1.6rem;
            color: #fff;
            font-size: 1rem;
            cursor: pointer;
            transition: opacity var(--transition);
            font-weight: 500;
        }

        .hero-faq .hero-search-box button:hover {
            opacity: 0.9;
        }

        /* ===== Section通用 ===== */
        .section {
            padding: var(--space-xl) 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 0.75rem;
            color: var(--color-text);
        }

        .section-subtitle {
            text-align: center;
            color: var(--color-text-muted);
            font-size: 1.05rem;
            max-width: 640px;
            margin: 0 auto var(--space-lg);
            line-height: 1.8;
        }

        /* ===== 卖点 Cards ===== */
        .value-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }

        .value-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-md);
            transition: all var(--transition);
            text-align: center;
            border: 1px solid rgba(0, 0, 0, 0.03);
        }

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

        .value-card .icon-circle {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(107, 63, 160, 0.1), rgba(59, 130, 246, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.6rem;
            color: var(--color-primary);
        }

        .value-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }

        .value-card p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== 使用流程 ===== */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }

        .flow-step {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.2rem;
            box-shadow: var(--shadow-sm);
            text-align: center;
            position: relative;
            transition: all var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }

        .flow-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .flow-step .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 0.8rem;
        }

        .flow-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .flow-step p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        .flow-step .step-arrow {
            position: absolute;
            right: -1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-primary);
            font-size: 1.2rem;
            opacity: 0.5;
        }

        .flow-step:last-child .step-arrow {
            display: none;
        }

        /* ===== FAQ Accordion ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid rgba(0, 0, 0, 0.03);
            transition: box-shadow var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            padding: 1.2rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            background: var(--color-white);
            transition: background var(--transition);
            border-left: 4px solid var(--color-primary);
            user-select: none;
        }

        .faq-question:hover {
            background: rgba(107, 63, 160, 0.03);
        }

        .faq-question .faq-icon {
            font-size: 1.2rem;
            color: var(--color-primary);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 1rem;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.5rem;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            background: rgba(248, 249, 252, 0.5);
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 1rem 1.5rem 1.5rem;
        }

        .faq-answer ul {
            list-style: disc;
            padding-left: 1.5rem;
            margin-top: 0.5rem;
        }

        .faq-answer ul li {
            margin-bottom: 0.3rem;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            padding: var(--space-xl) 0;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 2rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }

        .btn-cta-primary {
            background: var(--color-white);
            color: var(--color-primary);
            padding: 0.9rem 2.2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
        }

        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
            color: var(--color-primary-dark);
        }

        .btn-cta-secondary {
            background: transparent;
            color: #fff;
            padding: 0.9rem 2.2rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1.05rem;
            border: 2px solid rgba(255, 255, 255, 0.6);
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }

        .btn-cta-secondary:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-footer-bg);
            color: rgba(255, 255, 255, 0.8);
            padding: var(--space-xl) 0 0;
        }

        .footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-bottom: 1rem;
        }

        .footer .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 0.9rem;
        }

        .footer .footer-brand .brand-text {
            color: #fff;
            font-size: 1.2rem;
        }

        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 1.2rem;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 0.8rem;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-links h5,
        .footer-contact h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .footer-links ul li {
            margin-bottom: 0.5rem;
        }

        .footer-links ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
        }

        .footer-links ul li a:hover {
            color: var(--color-accent);
        }

        .footer-contact p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0.6rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer-contact p i {
            width: 1.2rem;
            text-align: center;
            color: var(--color-accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.5rem 0;
            margin-top: var(--space-lg);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #fff;
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(107, 63, 160, 0.3);
            transition: all var(--transition);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            z-index: 999;
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 25px rgba(107, 63, 160, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .value-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .flow-step .step-arrow {
                display: none;
            }

            .hero-faq h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 767px) {
            .header-inner {
                flex-wrap: nowrap;
                padding: 0.5rem 1rem;
            }

            .menu-toggle {
                display: block;
            }

            .nav-channel {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--color-white);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-lg);
                padding: 0.5rem;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                margin: 0.5rem 1rem;
                border: 1px solid rgba(0, 0, 0, 0.05);
            }

            .nav-channel.open {
                display: flex;
            }

            .nav-channel a {
                padding: 0.7rem 1rem;
                text-align: center;
            }

            .header-actions {
                gap: 0.4rem;
            }

            .header-actions .lang-toggle span {
                display: none;
            }

            .hero-faq {
                padding: 6rem 0 3rem;
                min-height: auto;
            }

            .hero-faq h1 {
                font-size: 1.8rem;
            }

            .hero-faq .subtitle {
                font-size: 1rem;
            }

            .hero-faq .hero-search-box {
                flex-direction: column;
                border-radius: var(--radius-md);
            }

            .hero-faq .hero-search-box button {
                padding: 0.8rem;
                width: 100%;
            }

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

            .flow-steps {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .section {
                padding: var(--space-lg) 0;
            }

            .cta-section h2 {
                font-size: 1.6rem;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .faq-question {
                padding: 1rem 1.2rem;
                font-size: 0.92rem;
            }

            .faq-answer {
                font-size: 0.88rem;
            }
        }

        @media (max-width: 520px) {
            .hero-faq h1 {
                font-size: 1.5rem;
            }

            .brand-text {
                font-size: 1rem;
            }

            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 0.8rem;
            }

            .btn-cta-primary,
            .btn-cta-secondary {
                padding: 0.7rem 1.5rem;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }

            .back-to-top {
                width: 40px;
                height: 40px;
                font-size: 1rem;
                bottom: 1.2rem;
                right: 1.2rem;
            }
        }

        /* Foundation grid compatibility */
        .grid-x {
            display: flex;
            flex-wrap: wrap;
        }

        .grid-margin-x {
            margin-left: -0.9375rem;
            margin-right: -0.9375rem;
        }

        .cell {
            padding-left: 0.9375rem;
            padding-right: 0.9375rem;
            flex: 1 1 auto;
        }

        .large-4 {
            flex: 0 0 33.33333%;
            max-width: 33.33333%;
        }

        .large-2 {
            flex: 0 0 16.66667%;
            max-width: 16.66667%;
        }

        .medium-6 {
            flex: 0 0 50%;
            max-width: 50%;
        }

        @media (max-width: 1023px) {
            .large-4,
            .large-2 {
                flex: 0 0 50%;
                max-width: 50%;
            }
        }

        @media (max-width: 767px) {
            .large-4,
            .large-2,
            .medium-6 {
                flex: 0 0 100%;
                max-width: 100%;
            }

            .footer .cell {
                margin-bottom: 1.5rem;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #6B3FA0;
            --color-primary-dark: #552d82;
            --color-primary-light: #8b5fbf;
            --color-secondary: #3B82F6;
            --color-secondary-dark: #2563eb;
            --color-accent: #F59E0B;
            --color-accent-dark: #d97706;
            --color-bg: #F8F9FC;
            --color-white: #FFFFFF;
            --color-dark: #1A1A2E;
            --color-text: #1A1A2E;
            --color-text-light: #6B7280;
            --color-text-lighter: #9CA3AF;
            --color-border: #E5E7EB;
            --color-shadow: rgba(0, 0, 0, 0.06);
            --color-shadow-hover: rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 4px 20px var(--color-shadow);
            --shadow-card-hover: 0 8px 30px var(--color-shadow-hover);
            --shadow-button: 0 4px 14px rgba(107, 63, 160, 0.3);
            --transition: 0.3s ease;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 3rem;
            --space-xl: 4rem;
            --space-2xl: 5rem;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --max-width: 1200px;
            --header-height: 120px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-stack);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin-top: 0;
            line-height: 1.3;
            color: var(--color-dark);
            font-weight: 700;
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-sm);
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
        }
        .header-inner {
            display: flex;
            flex-direction: column;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-sm);
        }

        /* Brand row */
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.6rem 0;
            border-bottom: 1px solid var(--color-border);
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-dark);
            letter-spacing: 0.5px;
        }
        .brand-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            font-weight: 900;
            font-size: 0.9rem;
            letter-spacing: 0;
        }
        .brand-logo .brand-text {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .brand-actions {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .brand-actions .search-toggle,
        .brand-actions .lang-toggle {
            background: none;
            border: none;
            font-size: 1.1rem;
            color: var(--color-text-light);
            cursor: pointer;
            padding: 0.3rem 0.5rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
        }
        .brand-actions .search-toggle:hover,
        .brand-actions .lang-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
            color: var(--color-primary);
        }

        /* Channel nav */
        .nav-channel {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.4rem 0;
            flex-wrap: wrap;
        }
        .nav-channel a {
            display: inline-block;
            padding: 0.5rem 1.2rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-light);
            border-radius: var(--radius-md);
            transition: background var(--transition), color var(--transition);
            position: relative;
            text-decoration: none;
        }
        .nav-channel a:hover {
            color: var(--color-primary);
            background: rgba(107, 63, 160, 0.08);
        }
        .nav-channel a.active {
            color: var(--color-white);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            box-shadow: 0 2px 12px rgba(107, 63, 160, 0.25);
        }
        .nav-channel a.active:hover {
            color: var(--color-white);
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
        }

        /* Mobile hamburger */
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-dark);
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: rgba(0, 0, 0, 0.05);
        }

        /* ===== Hero ===== */
        .hero {
            padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-xl);
            background: linear-gradient(135deg, rgba(107, 63, 160, 0.12), rgba(59, 130, 246, 0.10)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            text-align: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(2px);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-dark);
            margin-bottom: 0.75rem;
            letter-spacing: -0.5px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero .subtitle {
            font-size: 1.25rem;
            color: var(--color-text-light);
            max-width: 720px;
            margin: 0 auto var(--space-md);
            line-height: 1.6;
        }
        .hero .hero-actions {
            display: flex;
            gap: var(--space-sm);
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 600;
            line-height: 1.2;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            font-family: var(--font-stack);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            box-shadow: var(--shadow-button);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(107, 63, 160, 0.4);
        }
        .btn-secondary {
            background: var(--color-white);
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(107, 63, 160, 0.2);
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--color-accent), #f97316);
            color: var(--color-white);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }
        .btn-accent:hover,
        .btn-accent:focus {
            background: linear-gradient(135deg, var(--color-accent-dark), #ea580c);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 0.9rem;
        }
        .btn-lg {
            padding: 18px 40px;
            font-size: 1.1rem;
        }

        /* ===== Section ===== */
        .section {
            padding: var(--space-xl) 0;
        }
        .section-bg-light {
            background: var(--color-white);
        }
        .section-bg-alt {
            background: var(--color-bg);
        }
        .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            color: var(--color-dark);
        }
        .section-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: var(--color-text-light);
            max-width: 640px;
            margin: 0 auto var(--space-lg);
            line-height: 1.6;
        }

        /* ===== Card ===== */
        .card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: var(--space-md);
            transition: all var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card-icon {
            font-size: 2rem;
            color: var(--color-primary);
            margin-bottom: var(--space-sm);
        }
        .card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .card p {
            color: var(--color-text-light);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            font-size: 0.85rem;
            font-weight: 600;
            white-space: nowrap;
        }
        .badge-accent {
            background: linear-gradient(135deg, var(--color-accent), #f97316);
        }
        .badge-outline {
            background: transparent;
            border: 2px solid var(--color-primary);
            color: var(--color-primary);
        }

        /* ===== Table ===== */
        .requirements-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: var(--color-white);
        }
        .requirements-table thead {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
        }
        .requirements-table thead th {
            padding: 14px 18px;
            font-weight: 700;
            font-size: 0.95rem;
            text-align: left;
            letter-spacing: 0.3px;
            border: none;
        }
        .requirements-table tbody tr {
            transition: background var(--transition);
        }
        .requirements-table tbody tr:nth-child(even) {
            background: rgba(107, 63, 160, 0.04);
        }
        .requirements-table tbody tr:hover {
            background: rgba(107, 63, 160, 0.08);
        }
        .requirements-table tbody td {
            padding: 14px 18px;
            font-size: 0.92rem;
            color: var(--color-text);
            border-bottom: 1px solid var(--color-border);
            vertical-align: top;
        }
        .requirements-table tbody tr:last-child td {
            border-bottom: none;
        }
        .requirements-table .platform-icon {
            font-size: 1.3rem;
            margin-right: 0.5rem;
            color: var(--color-primary);
        }
        .requirements-table .tag {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(107, 63, 160, 0.1);
            color: var(--color-primary);
        }
        .requirements-table .tag.recommended {
            background: rgba(245, 158, 11, 0.15);
            color: var(--color-accent-dark);
        }

        /* ===== Feature Grid (交错图文) ===== */
        .feature-grid {
            display: flex;
            flex-direction: column;
            gap: var(--space-lg);
        }
        .feature-row {
            display: flex;
            align-items: center;
            gap: var(--space-lg);
            flex-wrap: wrap;
        }
        .feature-row.reverse {
            flex-direction: row-reverse;
        }
        .feature-row .feature-text {
            flex: 1 1 45%;
            min-width: 280px;
        }
        .feature-row .feature-image {
            flex: 1 1 45%;
            min-width: 280px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .feature-row .feature-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .feature-row h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .feature-row p {
            color: var(--color-text-light);
            font-size: 1rem;
            line-height: 1.7;
        }
        .feature-row .feature-list {
            list-style: none;
            padding: 0;
            margin: var(--space-sm) 0 0;
        }
        .feature-row .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            padding: 0.4rem 0;
            font-size: 0.95rem;
            color: var(--color-text);
        }
        .feature-row .feature-list li i {
            color: var(--color-primary);
            margin-top: 0.2rem;
        }

        /* ===== FAQ Accordion ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            border-left: 4px solid var(--color-primary);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.5rem;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--color-dark);
            cursor: pointer;
            background: var(--color-white);
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-stack);
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(107, 63, 160, 0.04);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--color-primary);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: var(--space-sm);
        }
        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 1.5rem 1rem;
            color: var(--color-text-light);
            line-height: 1.7;
            font-size: 0.95rem;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            padding: var(--space-xl) 0;
            text-align: center;
            color: var(--color-white);
        }
        .cta-section h2 {
            color: var(--color-white);
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto var(--space-md);
        }
        .cta-section .btn {
            background: var(--color-white);
            color: var(--color-primary);
            border: none;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn:hover {
            background: rgba(255, 255, 255, 0.9);
            color: var(--color-primary-dark);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: var(--space-xl) 0 var(--space-md);
        }
        .footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-bottom: var(--space-sm);
        }
        .footer .footer-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            font-weight: 900;
            font-size: 0.9rem;
        }
        .footer .footer-brand .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-white);
        }
        .footer .footer-desc {
            font-size: 0.9rem;
            opacity: 0.7;
            max-width: 360px;
            line-height: 1.6;
            margin-bottom: var(--space-sm);
        }
        .footer .footer-social {
            display: flex;
            gap: var(--space-sm);
        }
        .footer .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer .footer-social a:hover {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-3px);
        }
        .footer h5 {
            color: var(--color-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: var(--space-sm);
            letter-spacing: 0.3px;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            padding: 0.3rem 0;
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer ul li a:hover {
            color: var(--color-white);
        }
        .footer .footer-contact p {
            font-size: 0.9rem;
            opacity: 0.7;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.4rem;
        }
        .footer .footer-contact p i {
            width: 1.2rem;
            color: var(--color-primary-light);
        }
        .footer .footer-bottom {
            margin-top: var(--space-lg);
            padding-top: var(--space-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: var(--space-sm);
            font-size: 0.85rem;
            opacity: 0.6;
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer .footer-bottom a:hover {
            color: var(--color-white);
        }

        /* ===== Back to top ===== */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(107, 63, 160, 0.3);
            transition: all var(--transition);
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }
        .back-to-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 6px 20px rgba(107, 63, 160, 0.4);
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--header-height));
            background: rgba(0, 0, 0, 0.4);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition);
            pointer-events: none;
        }
        .mobile-nav-overlay.open {
            display: block;
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav-panel {
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            background: var(--color-white);
            padding: var(--space-sm) var(--space-md);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
            z-index: 1000;
            transform: translateY(-110%);
            transition: transform 0.35s ease;
            border-bottom: 2px solid var(--color-border);
        }
        .mobile-nav-panel.open {
            transform: translateY(0);
        }
        .mobile-nav-panel a {
            display: block;
            padding: 0.75rem 0;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--color-text-light);
            border-bottom: 1px solid var(--color-border);
            transition: color var(--transition);
        }
        .mobile-nav-panel a:last-child {
            border-bottom: none;
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            color: var(--color-primary);
        }
        .mobile-nav-panel a.active {
            font-weight: 700;
        }

        /* ===== Platform cards (alternative view) ===== */
        .platform-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--space-md);
        }
        .platform-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: var(--space-md);
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: all var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        .platform-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .platform-card .pf-icon {
            font-size: 2.2rem;
            color: var(--color-primary);
            margin-bottom: var(--space-sm);
        }
        .platform-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .platform-card .pf-badge {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(107, 63, 160, 0.1);
            color: var(--color-primary);
            margin-top: 0.25rem;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1023px) {
            :root {
                --header-height: 100px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero .subtitle {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .feature-row {
                flex-direction: column !important;
            }
            .feature-row .feature-text,
            .feature-row .feature-image {
                flex: 1 1 100%;
                min-width: 0;
            }
            .requirements-table {
                font-size: 0.85rem;
            }
            .requirements-table thead th,
            .requirements-table tbody td {
                padding: 10px 12px;
            }
        }

        @media screen and (max-width: 767px) {
            :root {
                --header-height: 80px;
            }
            .brand-row {
                padding: 0.4rem 0;
            }
            .brand-logo {
                font-size: 1.1rem;
            }
            .brand-logo .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 0.75rem;
            }
            .nav-channel {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .brand-actions .search-toggle,
            .brand-actions .lang-toggle {
                font-size: 1rem;
                padding: 0.2rem 0.4rem;
            }
            .hero {
                min-height: 320px;
                padding: calc(var(--header-height) + var(--space-lg)) 0 var(--space-lg);
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero .subtitle {
                font-size: 1rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
            .section {
                padding: var(--space-lg) 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
            .requirements-table {
                font-size: 0.78rem;
                display: block;
                overflow-x: auto;
                white-space: nowrap;
                border-radius: var(--radius-md);
            }
            .requirements-table thead th,
            .requirements-table tbody td {
                padding: 8px 10px;
            }
            .platform-cards {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-sm);
            }
            .footer .footer-brand .brand-text {
                font-size: 1.1rem;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .back-to-top {
                bottom: 1rem;
                right: 1rem;
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        @media screen and (max-width: 520px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero .subtitle {
                font-size: 0.9rem;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.9rem;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .platform-cards {
                grid-template-columns: 1fr;
            }
            .card {
                padding: var(--space-sm);
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 0.8rem 1rem;
            }
            .faq-answer {
                padding: 0 1rem 0.8rem;
                font-size: 0.9rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-sm {
            margin-top: var(--space-sm);
        }
        .mt-md {
            margin-top: var(--space-md);
        }
        .mt-lg {
            margin-top: var(--space-lg);
        }
        .mb-sm {
            margin-bottom: var(--space-sm);
        }
        .mb-md {
            margin-bottom: var(--space-md);
        }
        .mb-lg {
            margin-bottom: var(--space-lg);
        }
        .gap-sm {
            gap: var(--space-sm);
        }
        .gap-md {
            gap: var(--space-md);
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }