/* roulang page: index */
:root {
            --primary: #2D2D2D;
            --primary-light: #4a4a4a;
            --accent: #FF6B35;
            --accent-hover: #e85d2c;
            --accent-light: #fff0e8;
            --bg-white: #FFFFFF;
            --bg-light: #F8F8F8;
            --bg-dark: #2D2D2D;
            --text-primary: #2D2D2D;
            --text-secondary: #6b6b6b;
            --text-light: #9e9e9e;
            --text-white: #FFFFFF;
            --border-color: #e8e8e8;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.12);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.16);
            --transition: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 32px;
            background: transparent;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.15);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            border-bottom-color: rgba(0, 0, 0, 0.06);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
        }

        .site-header.scrolled .logo-text {
            color: var(--text-primary);
        }

        .site-header.scrolled .nav-link {
            color: var(--text-primary);
        }

        .site-header.scrolled .nav-cta {
            background: var(--accent);
            color: #fff;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .logo-icon {
            font-size: 28px;
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.92);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition);
            border-radius: 2px;
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
            white-space: nowrap;
        }

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

        .nav-cta i {
            font-size: 14px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: transparent;
            border: none;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }

        .site-header.scrolled .hamburger span {
            background: var(--text-primary);
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .mobile-overlay.open {
            opacity: 1;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: var(--bg-white);
            z-index: 999;
            padding: 80px 28px 32px;
            flex-direction: column;
            gap: 20px;
            box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
            transition: right 0.35s ease;
            overflow-y: auto;
        }

        .mobile-menu.open {
            right: 0;
        }

        .mobile-menu .nav-link {
            color: var(--text-primary);
            font-size: 18px;
            font-weight: 500;
            display: block;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .mobile-menu .nav-cta {
            margin-top: 12px;
            justify-content: center;
            width: 100%;
        }

        .mobile-close {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 28px;
            color: var(--text-primary);
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
        }

        @media (max-width: 992px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            .mobile-overlay {
                display: block;
            }
        }

        @media (max-width: 480px) {
            .site-header {
                padding: 0 16px;
            }
            .logo-text {
                font-size: 18px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            background-attachment: fixed;
            padding: 120px 24px 80px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(0, 0, 0, 0.65) 0%, rgba(0, 0, 0, 0.35) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            text-align: center;
            animation: heroFadeIn 1s ease forwards;
        }

        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(30px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-title {
            font-size: 48px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .hero-subtitle {
            font-size: 18px;
            font-weight: 300;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 700;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: background var(--transition), transform var(--transition);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
            color: #fff;
        }

        @media (max-width: 768px) {
            .hero {
                background-attachment: scroll;
                padding: 100px 16px 60px;
                min-height: 92vh;
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 26px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
        }

        /* ===== Section common ===== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section.bg-light {
            background: var(--bg-light);
        }

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

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

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

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Service Grid (爆款商品网格) ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .service-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            cursor: default;
            border: 1px solid var(--border-color);
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .service-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .service-card-body {
            padding: 22px 20px 24px;
        }

        .service-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .service-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .service-card-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: gap var(--transition);
        }

        .service-card-btn i {
            font-size: 12px;
            transition: transform var(--transition);
        }

        .service-card:hover .service-card-btn i {
            transform: translateX(4px);
        }

        @media (max-width: 992px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            .service-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .service-card-img {
                height: 180px;
            }
        }

        /* ===== Testimonials (评价轮播) ===== */
        .testimonials-track {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding: 8px 4px 16px;
            scrollbar-width: none;
        }

        .testimonials-track::-webkit-scrollbar {
            display: none;
        }

        .testimonial-card {
            flex: 0 0 340px;
            scroll-snap-align: start;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: box-shadow var(--transition);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
        }

        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 16px;
        }

        .testimonial-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            object-fit: cover;
            background: var(--bg-light);
            border: 2px solid var(--accent-light);
        }

        .testimonial-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .testimonial-stars {
            color: var(--accent);
            font-size: 14px;
            letter-spacing: 2px;
            margin-top: 2px;
        }

        .testimonial-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .testimonials-dots {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 24px;
        }

        .testimonials-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--border-color);
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
        }

        .testimonials-dots span.active {
            background: var(--accent);
            transform: scale(1.3);
        }

        @media (max-width: 768px) {
            .testimonial-card {
                flex: 0 0 280px;
                padding: 20px 18px;
            }
        }

        /* ===== Trust Bar (保障条) ===== */
        .trust-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
            padding: 40px 0;
        }

        .trust-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
            padding: 20px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .trust-item:hover {
            background: rgba(255, 107, 53, 0.06);
        }

        .trust-icon {
            font-size: 36px;
            color: var(--accent);
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-light);
            border-radius: 50%;
        }

        .trust-label {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .trust-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        @media (max-width: 992px) {
            .trust-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 480px) {
            .trust-bar {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .trust-item {
                padding: 16px 8px;
            }
            .trust-icon {
                font-size: 28px;
                width: 48px;
                height: 48px;
            }
        }

        /* ===== Latest News (最新资讯) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .news-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .news-card-body {
            padding: 18px 20px 20px;
        }

        .news-card-tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--accent-light);
            color: var(--accent);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .news-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-light);
            border-top: 1px solid var(--border-color);
            padding-top: 12px;
        }

        .news-card-link {
            font-weight: 600;
            color: var(--accent);
            font-size: 13px;
        }

        .news-card-link i {
            font-size: 11px;
            margin-left: 4px;
            transition: transform var(--transition);
        }

        .news-card:hover .news-card-link i {
            transform: translateX(3px);
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-light);
            font-size: 15px;
            background: var(--bg-light);
            border-radius: var(--radius-md);
        }

        @media (max-width: 992px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .news-card-img {
                height: 160px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }

        .faq-question:hover {
            background: var(--bg-light);
        }

        .faq-question i {
            font-size: 14px;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 22px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a1a 100%);
            padding: 80px 0;
            text-align: center;
        }

        .cta-title {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
        }

        .cta-btn:hover,
        .cta-btn:focus {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(255, 107, 53, 0.4);
            color: #fff;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-title {
                font-size: 26px;
            }
            .cta-btn {
                font-size: 16px;
                padding: 14px 32px;
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo-text {
            color: #fff;
            font-size: 20px;
            margin-bottom: 12px;
            display: block;
        }

        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-heading {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition);
        }

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

        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 16px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 18px;
            transition: background var(--transition), color var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
        }

        .footer-bottom {
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }

        /* ===== Animations ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #2D2D2D;
            --primary-light: #3D3D3D;
            --accent: #FF6B35;
            --accent-hover: #E55A2B;
            --accent-light: #FFF0E8;
            --bg: #FFFFFF;
            --bg-alt: #F8F8F8;
            --bg-dark: #1A1A2E;
            --text: #2D2D2D;
            --text-light: #6B7280;
            --text-white: #FFFFFF;
            --border: #E5E7EB;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-md: 12px;
            --shadow: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
            --transition: 0.3s ease;
            --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --font-en: 'Inter', system-ui, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-hover); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; }
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-h);
            display: flex; align-items: center; justify-content: space-between;
            padding: 0 32px;
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255,255,255,0.15);
            box-shadow: 0 2px 20px rgba(0,0,0,0.06);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255,255,255,0.96);
            box-shadow: 0 4px 30px rgba(0,0,0,0.10);
            border-bottom-color: rgba(0,0,0,0.06);
        }
        .site-header.scrolled .logo-text { color: var(--primary); }
        .site-header.scrolled .nav-link { color: var(--primary); }
        .site-header.scrolled .nav-link:hover { color: var(--accent); }
        .site-header.scrolled .nav-link.active { color: var(--accent); }
        .site-header.scrolled .nav-cta { background: var(--accent); color: #fff; }
        .site-header.scrolled .nav-cta:hover { background: var(--accent-hover); }

        .header-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
        .logo-icon {
            width: 38px; height: 38px;
            background: var(--accent); border-radius: 10px;
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 18px;
            box-shadow: 0 4px 10px rgba(255,107,53,0.3);
        }
        .logo-text {
            font-size: 20px; font-weight: 700; color: var(--text-white);
            letter-spacing: 0.5px; transition: color var(--transition);
        }
        .logo-text span { color: var(--accent); }

        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links li { position: relative; }
        .nav-link {
            padding: 8px 16px; font-size: 14px; font-weight: 500;
            color: rgba(255,255,255,0.85); border-radius: var(--radius-sm);
            transition: all var(--transition); white-space: nowrap;
        }
        .nav-link:hover { color: #fff; background: rgba(255,255,255,0.12); }
        .nav-link.active { color: var(--accent); background: rgba(255,107,53,0.12); }
        .nav-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

        .nav-cta {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 10px 24px; background: var(--accent); color: #fff;
            border-radius: var(--radius-sm); font-size: 14px; font-weight: 600;
            transition: all var(--transition); margin-left: 8px;
            box-shadow: 0 4px 14px rgba(255,107,53,0.35);
        }
        .nav-cta:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(255,107,53,0.45); }
        .nav-cta i { font-size: 14px; }

        .hamburger {
            display: none; flex-direction: column; gap: 5px;
            padding: 8px; cursor: pointer;
        }
        .hamburger span {
            display: block; width: 26px; height: 2.5px;
            background: var(--text-white); border-radius: 2px;
            transition: all var(--transition);
        }
        .site-header.scrolled .hamburger span { background: var(--primary); }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ===== Mobile Nav Overlay ===== */
        .mobile-overlay {
            display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.5); z-index: 998;
            opacity: 0; transition: opacity var(--transition);
        }
        .mobile-overlay.open { opacity: 1; }
        .mobile-menu {
            position: fixed; top: 0; right: -320px; width: 300px; height: 100%;
            background: var(--bg); z-index: 999;
            padding: 100px 28px 40px;
            box-shadow: -10px 0 40px rgba(0,0,0,0.15);
            transition: right 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            overflow-y: auto;
        }
        .mobile-menu.open { right: 0; }
        .mobile-menu .nav-link {
            display: block; padding: 14px 16px; font-size: 16px;
            color: var(--text); border-radius: var(--radius-sm);
            border-bottom: 1px solid var(--border);
        }
        .mobile-menu .nav-link:hover { background: var(--bg-alt); }
        .mobile-menu .nav-link.active { color: var(--accent); background: var(--accent-light); }
        .mobile-menu .nav-cta {
            display: flex; justify-content: center; margin-top: 20px;
            padding: 14px; font-size: 16px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: var(--bg-alt); border-bottom: 1px solid var(--border);
            padding: 16px 0; margin-top: var(--header-h);
        }
        .breadcrumb {
            display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
            font-size: 14px; color: var(--text-light);
        }
        .breadcrumb a { color: var(--text-light); transition: color var(--transition); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: #ccc; }
        .breadcrumb .current { color: var(--primary); font-weight: 500; }

        /* ===== Article Main ===== */
        .article-section { padding: 48px 0 64px; background: var(--bg); }
        .article-layout {
            display: flex; gap: 48px; align-items: flex-start;
        }
        .article-main { flex: 1; max-width: 760px; margin: 0 auto; }

        .article-header { margin-bottom: 36px; }
        .article-category {
            display: inline-block; padding: 4px 14px;
            background: var(--accent-light); color: var(--accent);
            border-radius: 20px; font-size: 13px; font-weight: 500;
            margin-bottom: 12px;
        }
        .article-title {
            font-size: 32px; font-weight: 700; line-height: 1.3;
            color: var(--primary); margin-bottom: 16px;
        }
        .article-meta {
            display: flex; align-items: center; flex-wrap: wrap; gap: 20px;
            font-size: 14px; color: var(--text-light);
        }
        .article-meta i { margin-right: 6px; color: var(--accent); }
        .article-meta .meta-item { display: flex; align-items: center; }

        .article-featured-image {
            margin-bottom: 32px; border-radius: var(--radius);
            overflow: hidden; box-shadow: var(--shadow);
        }
        .article-featured-image img { width: 100%; height: auto; display: block; }

        /* ===== Article Content (长文排版) ===== */
        .article-content {
            font-size: 17px; line-height: 1.85; color: var(--text);
        }
        .article-content p { margin-bottom: 20px; }
        .article-content h2 {
            font-size: 24px; font-weight: 700; color: var(--primary);
            margin: 36px 0 16px; padding-bottom: 10px;
            border-bottom: 2px solid var(--accent-light);
        }
        .article-content h3 {
            font-size: 20px; font-weight: 600; color: var(--primary);
            margin: 28px 0 12px;
        }
        .article-content ul, .article-content ol {
            margin: 16px 0 24px; padding-left: 24px;
        }
        .article-content ul li { list-style: disc; margin-bottom: 8px; }
        .article-content ol li { list-style: decimal; margin-bottom: 8px; }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light); padding: 16px 24px;
            margin: 24px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--primary-light); font-style: normal;
        }
        .article-content blockquote p:last-child { margin-bottom: 0; }
        .article-content img {
            max-width: 100%; border-radius: var(--radius-md);
            margin: 24px auto; box-shadow: var(--shadow);
        }
        .article-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
        .article-content a:hover { color: var(--accent-hover); }
        .article-content code {
            background: var(--bg-alt); padding: 2px 8px;
            border-radius: 4px; font-size: 0.9em; font-family: monospace;
        }
        .article-content pre {
            background: var(--bg-dark); color: #e2e8f0;
            padding: 20px 24px; border-radius: var(--radius-md);
            overflow-x: auto; margin: 24px 0; font-size: 14px; line-height: 1.6;
        }
        .article-content pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
        .article-content table {
            width: 100%; border-collapse: collapse; margin: 24px 0;
            font-size: 15px;
        }
        .article-content table th, .article-content table td {
            padding: 12px 16px; border: 1px solid var(--border); text-align: left;
        }
        .article-content table th { background: var(--bg-alt); font-weight: 600; color: var(--primary); }
        .article-content table tr:hover { background: #fafafa; }

        /* ===== Article Not Found ===== */
        .article-not-found {
            text-align: center; padding: 80px 20px;
        }
        .article-not-found .icon { font-size: 64px; color: #ddd; margin-bottom: 20px; }
        .article-not-found h2 { font-size: 28px; color: var(--primary); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-light); margin-bottom: 24px; font-size: 16px; }
        .article-not-found .btn-back {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 32px; background: var(--accent); color: #fff;
            border-radius: var(--radius-sm); font-weight: 600;
            transition: all var(--transition);
        }
        .article-not-found .btn-back:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); }

        /* ===== Related Posts ===== */
        .related-section { background: var(--bg-alt); padding: 48px 0; }
        .related-title {
            font-size: 22px; font-weight: 700; color: var(--primary);
            margin-bottom: 28px; display: flex; align-items: center; gap: 12px;
        }
        .related-title i { color: var(--accent); }
        .related-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .related-card {
            background: var(--bg); border-radius: var(--radius);
            overflow: hidden; box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .related-card img {
            width: 100%; height: 180px; object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover img { transform: scale(1.05); }
        .related-card-body { padding: 16px 20px 20px; }
        .related-card-body h3 {
            font-size: 16px; font-weight: 600; color: var(--primary);
            margin-bottom: 8px; line-height: 1.4;
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .related-card-body .meta {
            font-size: 13px; color: var(--text-light);
            display: flex; align-items: center; gap: 12px;
        }
        .related-card-body .meta i { font-size: 12px; }

        /* ===== Back Button ===== */
        .back-wrap { margin-top: 40px; text-align: center; }
        .btn-back-list {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 32px; background: var(--bg-alt); color: var(--text);
            border-radius: var(--radius-sm); font-weight: 500; font-size: 15px;
            border: 1px solid var(--border); transition: all var(--transition);
        }
        .btn-back-list:hover { background: var(--accent-light); color: var(--accent); border-color: var(--accent); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary); color: rgba(255,255,255,0.85);
            padding: 48px 0 24px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 32px; }
        .footer-brand .logo-text { color: #fff; font-size: 22px; display: inline-block; margin-bottom: 14px; }
        .footer-brand .logo-text span { color: var(--accent); }
        .footer-desc { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.65); margin-bottom: 20px; max-width: 360px; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 40px; height: 40px; border-radius: 50%;
            background: rgba(255,255,255,0.10); color: rgba(255,255,255,0.7);
            display: flex; align-items: center; justify-content: center;
            font-size: 18px; transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
        .footer-heading { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 16px; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { color: rgba(255,255,255,0.65); font-size: 14px; transition: all var(--transition); }
        .footer-links a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.10);
            padding-top: 20px; display: flex; justify-content: space-between;
            flex-wrap: wrap; gap: 12px;
            font-size: 13px; color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 992px) {
            .article-layout { flex-direction: column; }
            .article-main { max-width: 100%; }
            .article-title { font-size: 28px; }
        }

        @media (max-width: 768px) {
            .site-header { padding: 0 16px; }
            .nav-links { display: none; }
            .hamburger { display: flex; }

            .article-section { padding: 24px 0 40px; }
            .article-title { font-size: 24px; }
            .article-content { font-size: 16px; }
            .article-content h2 { font-size: 21px; }
            .article-content h3 { font-size: 18px; }
            .article-meta { flex-wrap: wrap; gap: 12px; font-size: 13px; }

            .related-grid { grid-template-columns: 1fr; gap: 16px; }
            .related-card img { height: 160px; }

            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .breadcrumb-wrap { padding: 12px 0; }
            .breadcrumb { font-size: 13px; }
        }

        @media (max-width: 520px) {
            .article-title { font-size: 20px; }
            .article-content { font-size: 15px; }
            .article-content pre { padding: 14px 16px; font-size: 13px; }
            .back-wrap .btn-back-list { width: 100%; justify-content: center; }
            .related-card-body h3 { font-size: 15px; }
        }

        /* ===== Print ===== */
        @media print {
            .site-header, .site-footer, .breadcrumb-wrap, .related-section, .back-wrap { display: none; }
            .article-section { padding-top: 0; }
            .article-title { font-size: 28px; }
            body { background: #fff; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2D2D2D;
            --primary-light: #4a4a4a;
            --accent: #FF6B35;
            --accent-hover: #e55a2b;
            --accent-light: #fff0ea;
            --bg-white: #FFFFFF;
            --bg-light: #F8F8F8;
            --bg-dark: #2D2D2D;
            --text-primary: #2D2D2D;
            --text-secondary: #6b6b6b;
            --text-light: #9e9e9e;
            --text-white: #FFFFFF;
            --border: #e8e8e8;
            --border-light: #f0f0f0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-white);
            padding-top: var(--header-height);
            overflow-x: hidden;
        }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-hover); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Typography ===== */
        .h1 { font-size: 36px; line-height: 1.2; }
        .h2 { font-size: 28px; line-height: 1.3; }
        .h3 { font-size: 22px; line-height: 1.4; }
        .body-text { font-size: 16px; line-height: 1.8; color: var(--text-secondary); }
        .small-text { font-size: 14px; line-height: 1.6; color: var(--text-light); }
        @media (max-width: 768px) {
            .h1 { font-size: 28px; }
            .h2 { font-size: 22px; }
            .h3 { font-size: 18px; }
            .body-text { font-size: 15px; }
        }

        /* ===== Button ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 16px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            text-align: center;
            min-height: 48px;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(255,107,53,0.35);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: var(--text-white);
            box-shadow: 0 6px 24px rgba(255,107,53,0.45);
            transform: translateY(-2px);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(255,107,53,0.3); }
        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.4);
        }
        .btn-secondary:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--text-white);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
        }
        .btn-outline:hover {
            background: var(--accent);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-lg { padding: 16px 40px; font-size: 18px; min-height: 56px; }
        .btn-sm { padding: 8px 20px; font-size: 14px; min-height: 40px; }
        .btn-full { width: 100%; }
        @media (max-width: 768px) {
            .btn { padding: 10px 22px; font-size: 15px; min-height: 44px; }
            .btn-lg { padding: 14px 32px; font-size: 16px; min-height: 50px; }
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-light { background: var(--bg-light); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-white { background: var(--bg-white); }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
        }
        .section-header .h2 { margin-bottom: 16px; }
        .section-header .body-text { font-size: 18px; }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 12px;
        }
        @media (max-width: 768px) {
            .section { padding: 48px 0; }
            .section-header { margin-bottom: 32px; }
            .section-header .body-text { font-size: 16px; }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            background: rgba(255,255,255,0.05);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.12);
            box-shadow: none;
            transition: all var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom-color: rgba(0,0,0,0.06);
            box-shadow: 0 2px 24px rgba(0,0,0,0.08);
        }
        .site-header.scrolled .logo-text,
        .site-header.scrolled .nav-link,
        .site-header.scrolled .nav-cta { color: var(--text-primary); }
        .site-header.scrolled .nav-cta {
            background: var(--accent);
            color: var(--text-white);
        }
        .site-header.scrolled .nav-cta:hover { background: var(--accent-hover); }
        .site-header.scrolled .hamburger span { background: var(--text-primary); }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .header-logo .logo-icon {
            font-size: 24px;
            color: var(--accent);
        }
        .header-logo .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .site-header.scrolled .header-logo .logo-text { color: var(--text-primary); }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: rgba(255,255,255,0.85);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-link:hover { color: var(--text-white); background: rgba(255,255,255,0.1); }
        .nav-link.active {
            color: var(--text-white);
            background: rgba(255,255,255,0.15);
            font-weight: 600;
        }
        .site-header.scrolled .nav-link { color: var(--text-secondary); }
        .site-header.scrolled .nav-link:hover { color: var(--text-primary); background: rgba(0,0,0,0.05); }
        .site-header.scrolled .nav-link.active { color: var(--accent); background: rgba(255,107,53,0.1); }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 700;
            color: var(--text-white);
            background: rgba(255,255,255,0.15);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
            margin-left: 8px;
        }
        .nav-cta:hover {
            background: var(--accent);
            color: var(--text-white);
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 10px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.1);
            transition: background var(--transition);
            flex-shrink: 0;
        }
        .hamburger span {
            display: block;
            height: 2px;
            background: var(--text-white);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
        .hamburger:hover { background: rgba(255,255,255,0.2); }
        .site-header.scrolled .hamburger { background: rgba(0,0,0,0.06); }
        .site-header.scrolled .hamburger:hover { background: rgba(0,0,0,0.1); }

        @media (max-width: 992px) {
            .nav-links { display: none; }
            .hamburger { display: flex; }
            .nav-links.open {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                padding: 24px 20px;
                gap: 8px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
            }
            .nav-links.open .nav-link {
                color: var(--text-primary);
                padding: 14px 20px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .nav-links.open .nav-link:hover { background: var(--bg-light); }
            .nav-links.open .nav-link.active { color: var(--accent); background: rgba(255,107,53,0.08); }
            .nav-links.open .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                justify-content: center;
                padding: 14px 20px;
                font-size: 16px;
                background: var(--accent);
                color: var(--text-white);
            }
            .nav-links.open .nav-cta:hover { background: var(--accent-hover); }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(45,45,45,0.85) 0%, rgba(0,0,0,0.7) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 80px 24px 60px;
            margin-top: calc(-1 * var(--header-height));
            padding-top: calc(var(--header-height) + 60px);
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-white) 0%, transparent 100%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-white);
            background: rgba(255,107,53,0.25);
            border: 1px solid rgba(255,107,53,0.3);
            border-radius: 40px;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .hero .h1 {
            font-size: 44px;
            color: var(--text-white);
            margin-bottom: 20px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .hero .h1 span { color: var(--accent); }
        .hero-sub {
            font-size: 18px;
            color: rgba(255,255,255,0.8);
            line-height: 1.7;
            max-width: 640px;
            margin: 0 auto 32px;
            font-weight: 400;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        @media (max-width: 768px) {
            .hero { min-height: 420px; padding: 60px 16px 48px; padding-top: calc(var(--header-height) + 40px); }
            .hero .h1 { font-size: 30px; }
            .hero-sub { font-size: 16px; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; max-width: 320px; }
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
        }
        .card .h3 { font-size: 18px; margin-bottom: 8px; }
        .card .body-text { font-size: 14px; color: var(--text-secondary); }
        .card-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-light);
            border-radius: 30px;
            margin-bottom: 10px;
        }
        .card-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--accent);
            background: var(--accent-light);
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            transition: all var(--transition);
        }
        .card:hover .card-icon {
            background: var(--accent);
            color: var(--text-white);
            transform: scale(1.05);
        }
        @media (max-width: 768px) {
            .card { padding: 20px; }
        }

        /* ===== Grid ===== */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }
        @media (max-width: 992px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
            .grid-3 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
        }

        /* ===== Steps ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
            position: relative;
        }
        .steps::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 60px;
            right: 60px;
            height: 2px;
            background: linear-gradient(to right, var(--accent), var(--border));
            z-index: 0;
        }
        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 32px 20px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-number {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-white);
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 4px 14px rgba(255,107,53,0.3);
        }
        .step-item .h3 { font-size: 17px; margin-bottom: 6px; }
        .step-item .body-text { font-size: 14px; }
        @media (max-width: 992px) {
            .steps { grid-template-columns: 1fr 1fr; }
            .steps::before { display: none; }
        }
        @media (max-width: 768px) {
            .steps { grid-template-columns: 1fr; gap: 16px; }
        }

        /* ===== Scene Cards ===== */
        .scene-card {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 28px 32px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .scene-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
            border-color: var(--accent);
        }
        .scene-icon {
            width: 60px;
            height: 60px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--accent);
            background: var(--accent-light);
            border-radius: var(--radius-sm);
        }
        .scene-text .h3 { font-size: 17px; margin-bottom: 4px; }
        .scene-text .body-text { font-size: 14px; }
        @media (max-width: 768px) {
            .scene-card { flex-direction: column; text-align: center; padding: 24px 20px; }
            .scene-icon { width: 52px; height: 52px; font-size: 24px; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            color: var(--text-primary);
            background: none;
            transition: all var(--transition);
            gap: 16px;
            min-height: 60px;
        }
        .faq-question:hover { background: var(--bg-light); }
        .faq-question .faq-icon {
            font-size: 14px;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 18px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
        }
        .faq-item.open .faq-answer { max-height: 400px; }
        @media (max-width: 768px) {
            .faq-question { padding: 14px 18px; font-size: 15px; min-height: 52px; }
            .faq-answer-inner { padding: 0 18px 14px; font-size: 14px; }
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: 80px 24px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a1a 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255,107,53,0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section .h2 { color: var(--text-white); margin-bottom: 16px; }
        .cta-section .body-text { color: rgba(255,255,255,0.7); font-size: 18px; max-width: 600px; margin: 0 auto 32px; }
        .cta-section .btn { font-size: 18px; padding: 16px 44px; }
        @media (max-width: 768px) {
            .cta-section { padding: 48px 16px; }
            .cta-section .body-text { font-size: 16px; }
            .cta-section .btn { font-size: 16px; padding: 14px 32px; width: 100%; max-width: 320px; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-white);
            display: block;
            margin-bottom: 12px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: rgba(255,255,255,0.6);
            background: rgba(255,255,255,0.06);
            border-radius: 50%;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            color: var(--accent);
            background: rgba(255,107,53,0.15);
            transform: translateY(-2px);
        }
        .footer-heading {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            transition: all var(--transition);
        }
        .footer-links a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 8px;
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-desc { max-width: 100%; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 14px 0;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: var(--text-light); font-size: 12px; }
        .breadcrumb .current { color: var(--text-primary); font-weight: 600; }

        /* ===== Content Intro ===== */
        .content-intro {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            padding: 0 0 32px;
        }
        .content-intro .body-text { font-size: 17px; }

        /* ===== Image Showcase ===== */
        .img-showcase {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .img-showcase:hover { box-shadow: var(--shadow-lg); }
        .img-showcase img { width: 100%; height: auto; }

        /* ===== Extra Utilities ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mt-48 { margin-top: 48px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .gap-16 { gap: 16px; }
        .gap-24 { gap: 24px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Focus & Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 520px) {
            .hero .h1 { font-size: 26px; }
            .hero-sub { font-size: 15px; }
            .section-header .h2 { font-size: 20px; }
            .step-number { width: 44px; height: 44px; font-size: 17px; }
            .btn-lg { padding: 12px 24px; font-size: 15px; }
            .header-logo .logo-text { font-size: 17px; }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2D2D2D;
            --accent: #FF6B35;
            --accent-hover: #e55a2b;
            --bg-white: #FFFFFF;
            --bg-light: #F8F8F8;
            --text-primary: #2D2D2D;
            --text-secondary: #555555;
            --text-light: #888888;
            --text-white: #FFFFFF;
            --border-light: #E8E8E8;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition: 0.3s ease;
            --max-width: 1200px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-white);
            padding-top: 72px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        ul {
            list-style: none;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 40px;
            height: 72px;
            background: transparent;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.15);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
            transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.95);
            border-bottom-color: rgba(0, 0, 0, 0.06);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
        }
        .site-header.scrolled .logo-text,
        .site-header.scrolled .nav-link {
            color: var(--text-primary);
        }
        .site-header.scrolled .nav-cta {
            background: var(--accent);
            color: var(--text-white);
        }
        .site-header.scrolled .nav-cta:hover {
            background: var(--accent-hover);
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            font-size: 24px;
            color: var(--accent);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
            transition: color var(--transition);
        }
        .site-header.scrolled .logo-text {
            color: var(--text-primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--accent);
        }
        .site-header.scrolled .nav-link {
            color: var(--text-secondary);
        }
        .site-header.scrolled .nav-link:hover,
        .site-header.scrolled .nav-link.active {
            color: var(--accent);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--accent);
            color: var(--text-white);
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .nav-cta:hover {
            background: var(--accent-hover);
            color: var(--text-white);
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            border: none;
            cursor: pointer;
            z-index: 1100;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .site-header.scrolled .hamburger span {
            background: var(--text-primary);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        /* 移动端菜单 */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 1050;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition);
        }
        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu .nav-link {
            font-size: 20px;
            color: var(--text-white);
        }
        .mobile-menu .nav-cta {
            font-size: 18px;
            padding: 14px 40px;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            background: var(--bg-light);
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-bar ol {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
        }
        .breadcrumb-bar ol li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-bar ol li+li::before {
            content: '›';
            font-size: 16px;
            color: var(--text-light);
        }
        .breadcrumb-bar a {
            color: var(--text-secondary);
        }
        .breadcrumb-bar a:hover {
            color: var(--accent);
        }
        .breadcrumb-bar .current {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 80px 24px;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 1;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.6;
            margin-bottom: 28px;
        }
        .page-hero .hero-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--accent);
            color: var(--text-white);
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .page-hero .hero-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-light);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            text-align: center;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .section-title-left {
            text-align: left;
        }
        .section-subtitle-left {
            text-align: left;
            margin-left: 0;
        }

        /* ===== 安全流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .process-step {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .process-step .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--text-white);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .process-step+.process-step::before {
            content: '→';
            position: absolute;
            left: -20px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            color: var(--accent);
            font-weight: 300;
        }
        .process-step:first-child::before {
            display: none;
        }

        /* ===== 安全措施卡片 ===== */
        .measures-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .measure-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-light);
        }
        .measure-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .measure-card .icon-wrap {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .measure-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .measure-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .measure-card .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(255, 107, 53, 0.12);
            color: var(--accent);
            font-size: 12px;
            font-weight: 500;
            margin-top: 12px;
        }

        /* ===== 适用场景 ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scenario-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 24px;
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .scenario-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .scenario-item .sc-icon {
            font-size: 28px;
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .scenario-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .scenario-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            cursor: pointer;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            background: rgba(255, 107, 53, 0.04);
        }
        .faq-question .faq-icon {
            font-size: 18px;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            padding: 72px 24px;
            text-align: center;
            position: relative;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            background: var(--accent);
            color: var(--text-white);
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .cta-section .cta-btn:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
        }
        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            margin: 12px 0 20px;
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 18px;
            transition: background var(--transition), color var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--text-white);
        }
        .footer-heading {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-step+.process-step::before {
                display: none;
            }
            .measures-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-hero h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            .site-header {
                padding: 0 20px;
            }
            .page-hero {
                min-height: 300px;
                padding: 60px 20px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .measures-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .scenario-item {
                padding: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section .cta-btn {
                width: 100%;
                justify-content: center;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }
            .logo-text {
                font-size: 17px;
            }
            .header-logo .logo-icon {
                font-size: 20px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 24px;
            }
            .page-hero .hero-cta {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 22px;
            }
            .measure-card {
                padding: 24px 18px;
            }
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--accent);
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .text-center {
            text-align: center;
        }

/* roulang page: category3 */
/* ===== CSS Variables ===== */
        :root {
            --primary: #2D2D2D;
            --primary-light: #3D3D3D;
            --accent: #FF6B35;
            --accent-hover: #e55a2a;
            --accent-light: rgba(255, 107, 53, 0.12);
            --bg-white: #FFFFFF;
            --bg-light: #F8F8F8;
            --bg-dark: #2D2D2D;
            --text-primary: #2D2D2D;
            --text-secondary: #6B6B6B;
            --text-light: #9A9A9A;
            --text-white: #FFFFFF;
            --border-color: #E8E8E8;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition: 0.3s ease;
            --max-width: 1200px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Navigation (玻璃沉浸) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 32px;
            height: 72px;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.15);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
            transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom-color: rgba(0, 0, 0, 0.06);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
        }

        .site-header.scrolled .logo-text {
            color: var(--text-primary);
        }
        .site-header.scrolled .nav-links .nav-link {
            color: var(--text-primary);
        }
        .site-header.scrolled .nav-links .nav-link:hover {
            color: var(--accent);
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .header-logo .logo-icon {
            font-size: 24px;
            color: var(--accent);
            display: flex;
            align-items: center;
        }

        .header-logo .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .site-header.scrolled .header-logo .logo-text {
            color: var(--text-primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links .nav-link {
            display: inline-block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.9);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            letter-spacing: 0.3px;
        }

        .nav-links .nav-link:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-white);
        }

        .site-header.scrolled .nav-links .nav-link:hover {
            background: var(--accent-light);
            color: var(--accent);
        }

        .nav-links .nav-link.active {
            color: var(--accent);
            background: rgba(255, 107, 53, 0.15);
            font-weight: 600;
        }

        .site-header.scrolled .nav-links .nav-link.active {
            background: var(--accent-light);
            color: var(--accent);
        }

        .nav-links .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-white);
            background: var(--accent);
            border-radius: var(--radius-sm);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            margin-left: 8px;
            letter-spacing: 0.3px;
        }

        .nav-links .nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
            color: var(--text-white);
        }

        .nav-links .nav-cta i {
            font-size: 14px;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-sm);
            gap: 5px;
            transition: background var(--transition);
            padding: 0;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 4px;
            transition: transform var(--transition), opacity var(--transition);
        }

        .site-header.scrolled .hamburger span {
            background: var(--text-primary);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Mobile Nav Overlay */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .nav-overlay.open {
            opacity: 1;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: var(--bg-white);
            z-index: 999;
            padding: 90px 28px 40px;
            box-shadow: -8px 0 40px rgba(0, 0, 0, 0.12);
            transition: right var(--transition);
            overflow-y: auto;
        }

        .mobile-nav.open {
            right: 0;
        }

        .mobile-nav .nav-link {
            display: block;
            padding: 14px 18px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            margin-bottom: 4px;
        }

        .mobile-nav .nav-link:hover {
            background: var(--accent-light);
            color: var(--accent);
        }

        .mobile-nav .nav-link.active {
            background: var(--accent-light);
            color: var(--accent);
            font-weight: 700;
        }

        .mobile-nav .nav-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 20px;
            padding: 14px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            background: var(--accent);
            border-radius: var(--radius-sm);
            transition: background var(--transition), transform var(--transition);
        }

        .mobile-nav .nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
        }

        @media (max-width: 992px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .nav-overlay {
                display: block;
                pointer-events: none;
            }
            .nav-overlay.open {
                pointer-events: auto;
            }
            .mobile-nav {
                display: block;
            }
            .site-header {
                padding: 0 20px;
                height: 64px;
            }
            .header-logo .logo-text {
                font-size: 17px;
            }
            .header-logo .logo-icon {
                font-size: 20px;
            }
        }

        @media (max-width: 480px) {
            .mobile-nav {
                width: 280px;
                right: -280px;
                padding: 80px 20px 30px;
            }
            .header-logo .logo-text {
                font-size: 15px;
            }
            .site-header {
                padding: 0 14px;
                height: 60px;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            padding: 120px 24px 80px;
            text-align: center;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-white), transparent);
            z-index: 2;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 820px;
            animation: heroFadeIn 1s ease forwards;
        }

        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(30px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-content .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            background: rgba(255, 107, 53, 0.2);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 107, 53, 0.3);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            color: #FF8A5C;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
        }

        .hero-content h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

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

        .hero-content .hero-sub {
            font-size: 18px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .hero-actions .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text-white);
            background: var(--accent);
            border-radius: var(--radius-sm);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 20px rgba(255, 107, 53, 0.35);
        }

        .hero-actions .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(255, 107, 53, 0.5);
            color: var(--text-white);
        }

        .hero-actions .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-sm);
            transition: background var(--transition), transform var(--transition), border-color var(--transition);
        }

        .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-3px);
            color: var(--text-white);
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: 70vh;
                padding: 100px 16px 60px;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .hero-content .hero-sub {
                font-size: 15px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                padding: 14px 28px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .hero-content h1 {
                font-size: 26px;
            }
            .hero-content .hero-sub {
                font-size: 14px;
            }
            .hero-content .hero-badge {
                font-size: 12px;
                padding: 4px 16px;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--bg-light);
            padding: 16px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .breadcrumb-bar .breadcrumb-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .breadcrumb-bar .breadcrumb-list a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

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

        .breadcrumb-bar .breadcrumb-list .sep {
            color: var(--text-light);
            font-size: 12px;
        }

        .breadcrumb-bar .breadcrumb-list .current {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .section-header .section-tag {
            display: inline-block;
            padding: 4px 16px;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            border-radius: 50px;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 40px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

        /* ===== Features / 服务优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .feature-card .feat-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--accent-light);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin: 0 auto 20px;
            transition: background var(--transition), transform var(--transition);
        }

        .feature-card:hover .feat-icon {
            background: var(--accent);
            color: var(--text-white);
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 992px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 600px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== Scenarios / 适用场景 ===== */
        .bg-light {
            background: var(--bg-light);
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .scenario-card {
            position: relative;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-color);
        }

        .scenario-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .scenario-card .scenario-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: transform var(--transition);
        }

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

        .scenario-card .scenario-body {
            padding: 24px 24px 28px;
        }

        .scenario-card .scenario-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .scenario-card .scenario-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .scenario-card .scenario-tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            border-radius: 50px;
            margin-bottom: 12px;
        }

        @media (max-width: 992px) {
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 600px) {
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .scenario-card .scenario-img {
                height: 180px;
            }
        }

        /* ===== Process / 找回流程 ===== */
        .process-steps {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            counter-reset: step;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 10%;
            right: 10%;
            height: 3px;
            background: linear-gradient(to right, var(--accent), var(--accent-light));
            border-radius: 4px;
            z-index: 0;
        }

        .process-step {
            flex: 1 1 180px;
            max-width: 220px;
            text-align: center;
            position: relative;
            z-index: 1;
            counter-increment: step;
            padding: 16px 12px;
        }

        .process-step .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--text-white);
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .process-step:hover .step-num {
            transform: scale(1.08);
            box-shadow: 0 6px 24px rgba(255, 107, 53, 0.45);
        }

        .process-step h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .process-steps {
                gap: 24px 12px;
            }
            .process-steps::before {
                display: none;
            }
            .process-step {
                flex: 1 1 140px;
                max-width: 160px;
            }
            .process-step .step-num {
                width: 48px;
                height: 48px;
                font-size: 18px;
            }
        }

        @media (max-width: 480px) {
            .process-step {
                flex: 1 1 100%;
                max-width: 280px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: color var(--transition), background var(--transition);
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--accent);
            background: rgba(255, 107, 53, 0.03);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 16px;
            color: var(--accent);
            transition: transform var(--transition);
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #2D2D2D 0%, #1E1E1E 100%);
            padding: 80px 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .cta-content .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 18px 44px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-white);
            background: var(--accent);
            border-radius: var(--radius-sm);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 24px rgba(255, 107, 53, 0.4);
        }

        .cta-content .btn-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 10px 40px rgba(255, 107, 53, 0.55);
            color: var(--text-white);
        }

        .cta-content .btn-cta i {
            font-size: 18px;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 16px;
            }
            .cta-content h2 {
                font-size: 26px;
            }
            .cta-content p {
                font-size: 15px;
            }
            .cta-content .btn-cta {
                padding: 16px 32px;
                font-size: 16px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Trust Bar ===== */
        .trust-bar {
            background: var(--bg-white);
            padding: 40px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .trust-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px 60px;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .trust-item i {
            font-size: 28px;
            color: var(--accent);
        }

        @media (max-width: 768px) {
            .trust-grid {
                gap: 20px 28px;
            }
            .trust-item {
                font-size: 13px;
            }
            .trust-item i {
                font-size: 22px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.9);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            display: block;
            margin-bottom: 16px;
        }

        .footer-brand .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            max-width: 380px;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 18px;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--text-white);
            transform: translateY(-3px);
        }

        .footer-heading {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition), padding-left var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0 32px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            gap: 12px;
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 40px 0 0;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }

        /* ===== Scroll to top ===== */
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--text-white);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(255, 107, 53, 0.35);
            z-index: 500;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: opacity var(--transition), transform var(--transition), visibility var(--transition), background var(--transition);
        }

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

        .scroll-top:hover {
            background: var(--accent-hover);
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(255, 107, 53, 0.5);
        }

        @media (max-width: 600px) {
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }

        /* ===== Focus visible ===== */
        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }