/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF6B35;
            --primary-hover: #E55A2B;
            --primary-active: #CC4F26;
            --secondary: #2D2D2D;
            --accent: #1A7B5C;
            --bg-light: #F8F9FA;
            --bg-white: #FFFFFF;
            --text-dark: #333333;
            --text-muted: #666666;
            --text-light: #999999;
            --border-color: #E0E0E0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
            --shadow-md: 0 6px 16px rgba(0,0,0,0.12);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.16);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition: all 0.3s ease;
            --nav-height: 72px;
        }

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

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

        body {
            font-family: var(--font-family);
            color: var(--text-dark);
            background: var(--bg-white);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--secondary);
            margin-bottom: 0.5em;
        }

        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }
        h5 { font-size: 1.125rem; }
        h6 { font-size: 1rem; }

        p {
            margin-bottom: 1em;
            color: var(--text-dark);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .section-padding {
            padding: 80px 0;
        }

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

        .section-title h2 {
            font-size: 2rem;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin: 12px auto 0;
        }

        .section-title p {
            color: var(--text-muted);
            font-size: 1.125rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
            height: var(--nav-height);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--secondary);
        }

        .logo i {
            font-size: 1.75rem;
            color: var(--primary);
        }

        .logo span {
            color: var(--secondary);
        }

        .logo:hover {
            color: var(--secondary);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-menu a {
            padding: 8px 16px;
            color: var(--text-dark);
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }

        .nav-menu a:hover {
            color: var(--primary);
            background: rgba(255,107,53,0.06);
        }

        .nav-menu a.active {
            color: var(--primary);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px 2px 0 0;
        }

        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            margin-left: 8px;
        }

        .nav-cta:hover {
            background: var(--primary-hover) !important;
            color: #fff !important;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        .nav-cta:active {
            transform: scale(0.97);
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--secondary);
            cursor: pointer;
            padding: 8px;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            z-index: 999;
            padding: 16px 20px;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-nav a {
            padding: 12px 16px;
            color: var(--text-dark);
            font-size: 1rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .mobile-nav a:hover {
            background: rgba(255,107,53,0.06);
            color: var(--primary);
        }

        .mobile-nav a.active {
            color: var(--primary);
            background: rgba(255,107,53,0.08);
        }

        .mobile-nav .nav-cta {
            margin-left: 0;
            margin-top: 8px;
            text-align: center;
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            min-height: 600px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(45,45,45,0.85) 0%, rgba(45,45,45,0.7) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 20% 50%, rgba(255,107,53,0.15) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 20px;
        }

        .hero h1 {
            font-size: 3rem;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
        }

        .hero h1 span {
            color: var(--primary);
        }

        .hero .subtitle {
            font-size: 1.25rem;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
            font-weight: 400;
        }

        .hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }

        .hero .hero-stats .stat-item {
            text-align: center;
        }

        .hero .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
            line-height: 1.2;
        }

        .hero .hero-stats .stat-label {
            font-size: 0.875rem;
            color: rgba(255,255,255,0.7);
            margin-top: 4px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }

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

        .btn-primary:active {
            transform: scale(0.96);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 600;
            border: 2px solid rgba(255,255,255,0.6);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }

        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: scale(0.96);
        }

        /* ===== Features / Core Advantages ===== */
        .features {
            background: var(--bg-light);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 40px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
            border: 1px solid rgba(0,0,0,0.04);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(255,107,53,0.15);
        }

        .feature-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(255,107,53,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.75rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .feature-card:hover .icon {
            background: var(--primary);
            color: #fff;
        }

        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }

        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ===== How It Works / 三步上手 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            counter-reset: step-counter;
        }

        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 24px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            position: relative;
            transition: var(--transition);
            border: 1px solid rgba(0,0,0,0.04);
        }

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

        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        .step-card h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
        }

        .step-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        .step-card .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== Case Studies ===== */
        .cases {
            background: var(--bg-light);
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid rgba(0,0,0,0.04);
        }

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

        .case-card .case-image {
            height: 200px;
            background: var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .case-card .case-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-card .case-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
        }

        .case-card .case-body {
            padding: 24px;
        }

        .case-card .case-body h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .case-card .case-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .case-card .case-link {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .case-card .case-link i {
            transition: var(--transition);
            font-size: 0.8rem;
        }

        .case-card .case-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Latest News / CMS List ===== */
        .news-list {
            background: var(--bg-white);
        }

        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            transition: var(--transition);
            border: 1px solid transparent;
            margin-bottom: 12px;
            background: var(--bg-white);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }

        .news-item:hover {
            background: var(--bg-light);
            border-color: var(--border-color);
            transform: translateX(4px);
        }

        .news-item .news-thumb {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--border-color);
        }

        .news-item .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

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

        .news-item .news-content h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
            font-weight: 600;
        }

        .news-item .news-content h4 a {
            color: var(--secondary);
        }

        .news-item .news-content h4 a:hover {
            color: var(--primary);
        }

        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 6px;
        }

        .news-item .news-meta .tag {
            background: rgba(255,107,53,0.1);
            color: var(--primary);
            padding: 2px 10px;
            border-radius: 12px;
            font-weight: 500;
            font-size: 0.75rem;
        }

        .news-item .news-excerpt {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0;
        }

        .news-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--bg-light);
            border-radius: var(--radius-md);
        }

        .news-empty i {
            font-size: 2.5rem;
            color: var(--text-light);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== FAQ Section ===== */
        .faq {
            background: var(--bg-light);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid rgba(0,0,0,0.04);
            transition: var(--transition);
        }

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

        .faq-item .faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1rem;
            font-weight: 600;
            color: var(--secondary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }

        .faq-item .faq-question:hover {
            color: var(--primary);
        }

        .faq-item .faq-question i {
            transition: var(--transition);
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

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

        .faq-item .faq-answer p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

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

        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: rgba(255,255,255,0.8);
            font-size: 1.125rem;
            max-width: 500px;
            margin: 0 auto 36px;
        }

        .cta-form {
            display: flex;
            gap: 16px;
            max-width: 700px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form .form-group {
            flex: 1;
            min-width: 180px;
        }

        .cta-form input,
        .cta-form select {
            width: 100%;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255,255,255,0.2);
            background: rgba(255,255,255,0.1);
            color: #fff;
            font-size: 0.95rem;
            transition: var(--transition);
            font-family: var(--font-family);
        }

        .cta-form input::placeholder {
            color: rgba(255,255,255,0.5);
        }

        .cta-form input:focus,
        .cta-form select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(255,107,53,0.3);
            background: rgba(255,255,255,0.15);
        }

        .cta-form select option {
            color: var(--text-dark);
            background: var(--bg-white);
        }

        .cta-form .btn-primary {
            padding: 14px 36px;
            font-size: 1rem;
            min-width: 140px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1a1a1a;
            color: rgba(255,255,255,0.7);
            padding: 48px 0 32px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .site-footer .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .logo i {
            color: var(--primary);
        }

        .site-footer .footer-brand p {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            max-width: 300px;
        }

        .site-footer h5 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }

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

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

        .site-footer ul li a:hover {
            color: var(--primary);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }

        .site-footer .footer-bottom a {
            color: rgba(255,255,255,0.4);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .hero h1 {
                font-size: 2.25rem;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .hero {
                min-height: 480px;
            }
            .hero h1 {
                font-size: 1.75rem;
            }
            .hero .subtitle {
                font-size: 1rem;
            }
            .hero .hero-stats {
                gap: 20px;
            }
            .hero .hero-stats .stat-number {
                font-size: 1.5rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cases-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .news-item {
                flex-direction: column;
                padding: 16px;
            }
            .news-item .news-thumb {
                width: 100%;
                height: 160px;
            }
            .section-padding {
                padding: 48px 0;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
            .cta-form {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-form .form-group {
                min-width: auto;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-item .faq-question {
                font-size: 0.95rem;
                padding: 16px 18px;
            }
            .faq-item .faq-answer.open {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero .subtitle {
                font-size: 0.9rem;
            }
            .hero .hero-buttons .btn-primary,
            .hero .hero-buttons .btn-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .container {
                padding: 0 16px;
            }
            .feature-card {
                padding: 28px 20px;
            }
            .step-card {
                padding: 28px 20px;
            }
            .case-card .case-body {
                padding: 18px;
            }
            .logo {
                font-size: 1.05rem;
            }
            .logo i {
                font-size: 1.4rem;
            }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
:root {
            --primary: #FF6B35;
            --primary-dark: #E55A2B;
            --secondary: #2D2D2D;
            --success: #1A7B5C;
            --bg-light: #F8F9FA;
            --text: #333333;
            --text-light: #666666;
            --text-muted: #999999;
            --border: #e5e7eb;
            --white: #FFFFFF;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 2px 8px rgba(0,0,0,0.08);
            --shadow-hover: 0 6px 16px rgba(0,0,0,0.12);
            --transition: all 0.25s ease;
            --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --gap: 2rem;
        }

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

        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg-light);
            line-height: 1.8;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        /* Header & Navigation */
        .site-header {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--secondary);
            white-space: nowrap;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo:hover { color: var(--secondary); }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 1.75rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            padding: 0.25rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }
        .nav-menu a:hover { color: var(--primary); }
        .nav-menu a:hover::after { width: 100%; }
        .nav-menu a.active { color: var(--primary); }
        .nav-menu a.active::after { width: 100%; }

        .nav-cta {
            background: var(--primary);
            color: var(--white) !important;
            padding: 0.5rem 1.4rem !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            color: var(--white) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(255,107,53,0.3);
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:active { transform: scale(0.95); }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 0.5rem;
        }
        .hamburger span {
            width: 26px;
            height: 3px;
            background: var(--secondary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb {
            padding: 1.25rem 0 0.5rem;
            font-size: 0.875rem;
            color: var(--text-muted);
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { margin: 0 0.5rem; color: #ccc; }
        .breadcrumb .current { color: var(--text); font-weight: 500; }

        /* Article Main */
        .article-main {
            padding: 2rem 0 3rem;
        }

        .article-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .article-header h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--secondary);
            margin: 0 0 1rem;
        }
        .article-meta {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .article-meta i { margin-right: 0.35rem; }
        .article-meta .category-tag {
            background: var(--primary);
            color: var(--white);
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
        }

        .article-body {
            max-width: 800px;
            margin: 0 auto;
            background: var(--white);
            padding: 2.5rem 2.8rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-body h2 {
            font-size: 1.6rem;
            color: var(--secondary);
            margin: 2rem 0 1rem;
            line-height: 1.3;
        }
        .article-body h3 {
            font-size: 1.25rem;
            color: var(--secondary);
            margin: 1.5rem 0 0.75rem;
            line-height: 1.4;
        }
        .article-body p {
            margin: 0 0 1.2em;
            color: var(--text);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-light);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body img {
            margin: 1.5rem auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-body ul, .article-body ol {
            margin: 0 0 1.2em 1.5em;
        }
        .article-body li { margin-bottom: 0.4em; }
        .article-body a { font-weight: 500; }

        .article-empty {
            max-width: 600px;
            margin: 4rem auto;
            text-align: center;
            padding: 3rem;
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-empty i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        .article-empty h3 {
            color: var(--secondary);
            margin: 0 0 0.5rem;
        }
        .article-empty p {
            color: var(--text-muted);
            margin: 0 0 1.5rem;
        }
        .article-empty .btn-back {
            display: inline-block;
            padding: 0.6rem 2rem;
            background: var(--primary);
            color: var(--white);
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
        }
        .article-empty .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* Related Section */
        .related-section {
            background: var(--white);
            padding: 2.5rem 0;
            margin-top: 2rem;
            border-top: 1px solid var(--border);
        }
        .related-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--secondary);
            text-align: center;
            margin: 0 0 2rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .related-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card-body {
            padding: 1.25rem 1.5rem 1.5rem;
        }
        .related-card-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--secondary);
            margin: 0 0 0.5rem;
            line-height: 1.4;
        }
        .related-card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin: 0 0 0.75rem;
            line-height: 1.6;
        }
        .related-card-body .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            padding: 0.3rem 1rem;
            border-radius: 20px;
            transition: var(--transition);
        }
        .related-card-body .btn-outline:hover {
            background: var(--primary);
            color: var(--white);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.85);
            padding: 3rem 0 0;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255,255,255,0.12);
        }
        .footer-brand .logo {
            color: var(--white);
            margin-bottom: 0.75rem;
        }
        .footer-brand .logo i { color: var(--primary); }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            margin: 0.5rem 0 0;
            max-width: 360px;
        }
        .site-footer h5 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--white);
            margin: 0 0 1rem;
        }
        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer ul li { margin-bottom: 0.5rem; }
        .site-footer ul a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .site-footer ul a:hover { color: var(--primary); }
        .site-footer ul a i { margin-right: 0.4rem; }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.25rem 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
            margin: 0 0.5rem;
        }
        .footer-bottom a:hover { color: var(--primary); }

        /* Responsive */
        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 767px) {
            .hamburger { display: flex; }

            .nav-menu {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                padding: 1.5rem 1.25rem;
                gap: 1rem;
                box-shadow: 0 8px 24px rgba(0,0,0,0.12);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 2px solid var(--primary);
                z-index: 99;
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-menu a { font-size: 1.05rem; padding: 0.5rem 0; }

            .article-header h1 { font-size: 1.6rem; }
            .article-body { padding: 1.5rem 1.2rem; }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .article-meta { gap: 0.75rem; font-size: 0.8rem; }
        }

        @media (max-width: 520px) {
            .header-inner { height: 60px; }
            .logo { font-size: 1.1rem; }
            .logo i { font-size: 1.3rem; }
            .article-main { padding: 1rem 0 2rem; }
            .article-body { padding: 1.25rem 1rem; }
            .article-body h2 { font-size: 1.35rem; }
            .article-body h3 { font-size: 1.1rem; }
        }

        /* Foundation override */
        .grid-container { max-width: var(--container); padding-left: 1.25rem; padding-right: 1.25rem; }
        .accordion-title { font-size: 1rem; }
        .accordion-title:focus { outline: 2px solid var(--primary); outline-offset: 2px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #FF6B35;
            --primary-hover: #E55A2B;
            --primary-active: #CC4E22;
            --secondary: #2D2D2D;
            --accent: #1A7B5C;
            --bg-light: #F8F9FA;
            --bg-white: #FFFFFF;
            --text-primary: #333333;
            --text-secondary: #666666;
            --text-light: #999999;
            --border-color: #E8E8E8;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
            --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.16);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --transition: all 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-family);
            color: var(--text-primary);
            background: var(--bg-white);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--secondary);
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 排版 ===== */
        h1 {
            font-size: 2.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            line-height: 1.3;
        }
        h3 {
            font-size: 1.5rem;
            line-height: 1.4;
        }
        h4 {
            font-size: 1.25rem;
        }
        p {
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 1.5em;
            color: var(--text-secondary);
        }
        .text-sm {
            font-size: 0.875rem;
        }
        .text-lg {
            font-size: 1.125rem;
        }
        .text-center {
            text-align: center;
        }
        .text-primary {
            color: var(--primary);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:active {
            background: var(--primary-active);
            border-color: var(--primary-active);
            transform: scale(0.97);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: #fff;
        }
        .btn-outline:hover {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            transform: translateY(-1px);
        }
        .btn-outline:active {
            transform: scale(0.97);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .btn-white:hover {
            background: var(--bg-light);
            color: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-white:active {
            transform: scale(0.97);
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.125rem;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.875rem;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 30px;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            height: 100%;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 107, 53, 0.1);
            border-radius: var(--radius-sm);
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }
        .card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .card .badge {
            display: inline-block;
            background: rgba(255, 107, 53, 0.12);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== 标签/badge ===== */
        .tag {
            display: inline-block;
            background: var(--bg-light);
            color: var(--text-secondary);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid var(--border-color);
        }
        .tag-primary {
            background: rgba(255, 107, 53, 0.12);
            color: var(--primary);
            border-color: transparent;
        }

        /* ===== 徽章/统计数字 ===== */
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 16px 0 24px;
        }
        .divider-center {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 区块间距 ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            margin-bottom: 12px;
        }
        .section-title p {
            max-width: 640px;
            margin: 0 auto;
            color: var(--text-secondary);
            font-size: 1.1rem;
        }

        /* ===== 背景变体 ===== */
        .bg-light {
            background: var(--bg-light);
        }
        .bg-dark {
            background: var(--secondary);
            color: #fff;
        }
        .bg-dark h2,
        .bg-dark h3,
        .bg-dark p {
            color: #fff;
        }
        .bg-primary-light {
            background: rgba(255, 107, 53, 0.05);
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid #eee;
            height: var(--header-height);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--secondary);
            text-decoration: none;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .logo span {
            color: var(--secondary);
        }
        .logo:hover {
            color: var(--secondary);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-menu a {
            padding: 8px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            text-decoration: none;
            position: relative;
        }
        .nav-menu a:hover {
            color: var(--primary);
            background: rgba(255, 107, 53, 0.06);
        }
        .nav-menu a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .nav-menu a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            margin-left: 8px;
        }
        .nav-menu a.nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .nav-menu a.nav-cta.active::after {
            display: none;
        }

        /* 移动端汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 26px;
            height: 3px;
            background: var(--secondary);
            border-radius: 3px;
            transition: var(--transition);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 120px 0 80px;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: var(--secondary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            margin-top: var(--header-height);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(45, 45, 45, 0.85) 30%, rgba(255, 107, 53, 0.35) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
        }
        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.9);
            max-width: 720px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* ===== 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .features-grid .card {
            text-align: center;
            padding: 40px 28px;
        }
        .features-grid .card .card-icon {
            margin: 0 auto 20px;
        }

        /* ===== 技术保障（图文混排） ===== */
        .tech-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .tech-image img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .tech-content h2 {
            margin-bottom: 16px;
        }
        .tech-content .divider {
            margin-left: 0;
        }
        .tech-content ul {
            margin-top: 20px;
        }
        .tech-content ul li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 1rem;
            color: var(--text-secondary);
        }
        .tech-content ul li i {
            color: var(--accent);
            font-size: 1.1rem;
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== 适用场景 ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .scenario-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .scenario-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .scenario-card .scenario-body {
            padding: 24px 24px 28px;
        }
        .scenario-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .scenario-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .scenario-card .tag {
            margin-bottom: 12px;
        }

        /* ===== 认证流程 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 32px 20px;
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: block;
            width: 44px;
            height: 44px;
            line-height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 16px;
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .step-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            opacity: 0.5;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-white);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: var(--bg-light);
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--primary);
            font-size: 0.9rem;
        }
        .faq-question.active i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--secondary);
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(45, 45, 45, 0.88);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
        }
        .cta-form {
            display: flex;
            gap: 16px;
            max-width: 680px;
            margin: 32px auto 0;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input,
        .cta-form select {
            flex: 1 1 180px;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 0.95rem;
            transition: var(--transition);
            outline: none;
        }
        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        .cta-form input:focus,
        .cta-form select:focus {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.2);
            box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.3);
        }
        .cta-form select option {
            color: var(--text-primary);
            background: #fff;
        }
        .cta-form .btn {
            flex: 0 0 auto;
            padding: 14px 36px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .logo span {
            color: #fff;
        }
        .site-footer .logo i {
            color: var(--primary);
        }
        .site-footer p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            max-width: 360px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-grid h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-grid ul li {
            margin-bottom: 10px;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .footer-grid ul li a:hover {
            color: var(--primary);
        }
        .footer-grid ul li a i {
            margin-right: 8px;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .tech-section {
                gap: 30px;
            }
            .hero h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            .site-header .container {
                padding: 0 16px;
            }
            .hamburger {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 20px;
                border-bottom: 1px solid #eee;
                box-shadow: var(--shadow-md);
                gap: 4px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-menu a.active::after {
                display: none;
            }
            .nav-menu a.active {
                background: rgba(255, 107, 53, 0.08);
            }
            .nav-menu a.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
            .hero {
                padding: 100px 0 60px;
                min-height: 400px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .section {
                padding: 60px 0;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-arrow {
                display: none;
            }
            .tech-section {
                grid-template-columns: 1fr;
            }
            .tech-image {
                order: -1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-form {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-form input,
            .cta-form select,
            .cta-form .btn {
                flex: 1 1 auto;
                width: 100%;
            }
            .section-title {
                margin-bottom: 32px;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
            .hero .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .hero .btn-group .btn {
                width: 100%;
                max-width: 300px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --header-height: 64px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero p {
                font-size: 0.9rem;
            }
            .section {
                padding: 40px 0;
            }
            .card {
                padding: 20px;
            }
            .features-grid .card {
                padding: 28px 20px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
        }

        /* ===== 移动端 overlay ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.3);
            z-index: 999;
        }
        .nav-overlay.show {
            display: block;
        }
        @media (max-width: 768px) {
            .nav-overlay.show {
                display: block;
            }
        }

        /* ===== Foundation 覆盖 ===== */
        .accordion-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 18px 24px;
        }
        .accordion-title:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .accordion-title::before {
            color: var(--primary);
        }
        .accordion-content {
            border: 1px solid var(--border-color);
            border-top: none;
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 空状态占位 */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
        }
        .empty-state i {
            font-size: 2.5rem;
            margin-bottom: 16px;
            color: var(--border-color);
        }
        .empty-state p {
            font-size: 1rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* 统计条 */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            text-align: center;
            padding: 40px 0;
        }
        .stats-bar .stat-item {
            padding: 20px;
        }
        .stats-bar .stat-item .stat-number {
            display: block;
        }
        .stats-bar .stat-item .stat-label {
            display: block;
            margin-top: 6px;
        }
        @media (max-width: 640px) {
            .stats-bar {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* 额外间距 */
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .mb-40 {
            margin-bottom: 40px;
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #FF6B35;
            --primary-dark: #E55A2B;
            --primary-light: rgba(255, 107, 53, 0.12);
            --secondary: #2D2D2D;
            --accent: #1A7B5C;
            --bg: #F8F9FA;
            --bg-light: #FFFFFF;
            --text: #333333;
            --text-weak: #6B7280;
            --text-muted: #9CA3AF;
            --border: #E5E7EB;
            --border-light: #F0F0F0;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
            --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.15);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        ul {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 版式 ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--secondary);
            margin-bottom: 0.5em;
        }
        h1 {
            font-size: 2.5rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.25rem;
        }
        h5 {
            font-size: 1.1rem;
        }
        h6 {
            font-size: 1rem;
        }
        p {
            margin-bottom: 1em;
        }
        .text-small {
            font-size: 0.875rem;
            color: var(--text-weak);
        }

        /* ===== 头部与导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            transition: box-shadow var(--transition);
        }
        .site-header:hover {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--secondary);
            text-decoration: none;
            transition: opacity var(--transition);
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo span {
            color: var(--secondary);
        }
        .logo:hover {
            opacity: 0.85;
        }
        .logo:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-menu a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: background var(--transition), color var(--transition);
            position: relative;
            text-decoration: none;
        }
        .nav-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-menu a.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-menu a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            margin-left: 8px;
            transition: background var(--transition), transform var(--transition);
        }
        .nav-menu a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        .nav-menu a.nav-cta:active {
            transform: scale(0.95);
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 8px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        /* ===== Hero 区域 ===== */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 20px 80px;
            background: linear-gradient(135deg, rgba(45, 45, 45, 0.82) 0%, rgba(45, 45, 45, 0.65) 100%),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            color: #fff;
            margin-top: var(--header-height);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(255, 107, 53, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
            letter-spacing: -0.01em;
        }
        .hero-content .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-actions .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero-actions .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 107, 53, 0.35);
        }
        .hero-actions .btn-primary:active {
            transform: scale(0.96);
        }
        .hero-actions .btn-outline {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1.05rem;
            border: 2px solid rgba(255, 255, 255, 0.7);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero-actions .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .hero-actions .btn-outline:active {
            transform: scale(0.96);
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.95);
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-bg-alt {
            background: var(--bg-light);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            color: var(--text-weak);
            max-width: 620px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        /* ===== 卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .card {
            background: var(--bg-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 32px 28px;
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card .card-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .card h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        .card p {
            color: var(--text-weak);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .card .card-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.75rem;
            padding: 2px 14px;
            border-radius: 40px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== 图文混排区块 ===== */
        .split-block {
            display: flex;
            align-items: center;
            gap: 50px;
            margin-bottom: 60px;
        }
        .split-block.reverse {
            flex-direction: row-reverse;
        }
        .split-block .split-image {
            flex: 0 0 46%;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: #eee;
            min-height: 280px;
            background-size: cover;
            background-position: center;
        }
        .split-block .split-text {
            flex: 1;
        }
        .split-block .split-text h3 {
            font-size: 1.6rem;
            margin-bottom: 12px;
        }
        .split-block .split-text p {
            color: var(--text-weak);
            line-height: 1.8;
        }
        .split-block .split-text .feature-list {
            margin-top: 16px;
        }
        .split-block .split-text .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 8px;
            font-size: 0.95rem;
        }
        .split-block .split-text .feature-list li i {
            color: var(--accent);
            margin-top: 4px;
            font-size: 1rem;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
        }
        .step-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.6;
        }
        .step-card .step-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.4rem;
            color: var(--primary);
            opacity: 0.5;
        }
        .steps-grid .step-card:last-child .step-arrow {
            display: none;
        }

        /* ===== 适用场景 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scene-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 28px 24px;
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .scene-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .scene-card .scene-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .scene-card h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .scene-card p {
            font-size: 0.92rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== 数据统计 ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 36px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: var(--text-weak);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-light);
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: #fafafa;
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--primary);
            font-size: 1.1rem;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-weak);
            line-height: 1.7;
            font-size: 0.95rem;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #1a1a1a 100%);
            padding: 72px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-form {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-form input,
        .cta-form select {
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 0.95rem;
            min-width: 180px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .cta-form input:focus,
        .cta-form select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.25);
            outline: none;
        }
        .cta-form select option {
            color: var(--text);
        }
        .cta-form .btn-cta {
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            font-size: 1rem;
        }
        .cta-form .btn-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        .cta-form .btn-cta:active {
            transform: scale(0.95);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.8);
            padding: 52px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--primary);
        }
        .footer-brand .logo span {
            color: #fff;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 320px;
        }
        .site-footer h5 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
            text-decoration: none;
        }
        .site-footer ul li a:hover {
            color: var(--primary);
        }
        .site-footer ul li a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== 移动端导航 ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            padding: 16px 20px;
            z-index: 999;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
            transform: translateY(-110%);
            transition: transform var(--transition);
        }
        .mobile-nav.open {
            transform: translateY(0);
        }
        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
        }
        .mobile-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-nav a.nav-cta-mobile {
            background: var(--primary);
            color: #fff;
            text-align: center;
            margin-top: 8px;
            font-weight: 600;
        }
        .mobile-nav a.nav-cta-mobile:hover {
            background: var(--primary-dark);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1023px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid .step-card .step-arrow {
                display: none;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .split-block {
                flex-direction: column;
                gap: 30px;
            }
            .split-block.reverse {
                flex-direction: column;
            }
            .split-block .split-image {
                flex: none;
                width: 100%;
                min-height: 220px;
            }
            .hero-content h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 767px) {
            .nav-menu {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav {
                display: block;
            }
            .hero-section {
                min-height: 400px;
                padding: 100px 20px 60px;
            }
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .hero-content .hero-sub {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
            .section {
                padding: 48px 0;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item {
                padding: 24px 16px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-form input,
            .cta-form select {
                width: 100%;
                max-width: 360px;
            }
            .cta-form .btn-cta {
                width: 100%;
                max-width: 360px;
            }
            .split-block .split-image {
                min-height: 180px;
            }
            .card {
                padding: 24px 20px;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.5rem;
            }
            .hero-content .hero-sub {
                font-size: 0.9rem;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 1.7rem;
            }
            .stat-item {
                padding: 18px 12px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.3rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF6B35;
            --primary-dark: #E55A2B;
            --primary-light: #FF8A5C;
            --secondary: #2D2D2D;
            --accent: #1A7B5C;
            --bg-light: #F8F9FA;
            --bg-white: #FFFFFF;
            --text-dark: #333333;
            --text-muted: #6B7A8F;
            --text-light: #9AA5B4;
            --border-color: #E9ECEF;
            --border-light: #F0F2F5;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
            --shadow-md: 0 6px 16px rgba(0,0,0,0.12);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.15);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --max-width: 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-family);
            color: var(--text-dark);
            background: var(--bg-white);
            line-height: 1.8;
            font-size: 1rem;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--secondary); }
        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section-padding { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { color: var(--text-muted); font-size: 1.1rem; max-width: 640px; margin: 0 auto; }

        /* ===== Foundation Overrides ===== */
        .grid-container { max-width: var(--max-width); padding-left: 24px; padding-right: 24px; }
        .grid-x { margin-left: -12px; margin-right: -12px; }
        .cell { padding: 12px; }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 4px rgba(0,0,0,0.03);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: 0.5px;
        }
        .logo i { color: var(--primary); font-size: 1.6rem; }
        .logo span { color: var(--secondary); }
        .logo:hover { color: var(--secondary); }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-menu a {
            color: var(--text-dark);
            font-size: 0.95rem;
            font-weight: 500;
            position: relative;
            padding: 6px 0;
            transition: var(--transition);
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-menu a:hover { color: var(--primary); }
        .nav-menu a:hover::after { width: 100%; }
        .nav-menu a.active { color: var(--primary); }
        .nav-menu a.active::after { width: 100%; }
        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(255,107,53,0.25);
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #fff !important;
            box-shadow: 0 4px 12px rgba(255,107,53,0.35);
            transform: translateY(-1px);
        }
        .nav-cta:active { transform: scale(0.96); }
        .nav-toggle { display: none; font-size: 1.5rem; color: var(--secondary); cursor: pointer; background: none; border: none; padding: 8px; }
        .nav-toggle:focus { outline: 2px solid var(--primary); outline-offset: 2px; }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            min-height: 520px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(15,52,96,0.7) 100%);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            color: #fff;
            text-align: center;
            padding: 80px 24px;
            max-width: 800px;
            margin: 0 auto;
        }
        .hero-content h1 {
            font-size: 3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .hero-content h1 i { color: var(--primary); }
        .hero-content .subtitle {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.85);
            line-height: 1.8;
            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, .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(255,107,53,0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255,107,53,0.4);
        }
        .btn-primary:active { transform: scale(0.96); }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255,255,255,0.7);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active { transform: scale(0.96); }

        /* ===== Core Capabilities ===== */
        .capabilities-section { background: var(--bg-white); }
        .capability-item {
            display: flex;
            align-items: center;
            gap: 48px;
            margin-bottom: 64px;
        }
        .capability-item:last-child { margin-bottom: 0; }
        .capability-item.reverse { flex-direction: row-reverse; }
        .capability-text { flex: 1; }
        .capability-text h3 {
            font-size: 1.6rem;
            margin-bottom: 12px;
            color: var(--secondary);
        }
        .capability-text h3 i { color: var(--primary); margin-right: 8px; }
        .capability-text p {
            color: var(--text-muted);
            font-size: 1.05rem;
            line-height: 1.8;
        }
        .capability-text .tag {
            display: inline-block;
            background: rgba(255,107,53,0.1);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .capability-image { flex: 1; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
        .capability-image img { width: 100%; height: auto; display: block; transition: var(--transition); }
        .capability-image:hover img { transform: scale(1.02); }

        /* ===== Use Scenarios ===== */
        .scenarios-section { background: var(--bg-light); }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .scenario-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
            border: 1px solid var(--border-light);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .scenario-card .icon {
            width: 64px;
            height: 64px;
            background: rgba(255,107,53,0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.8rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .scenario-card:hover .icon { background: var(--primary); color: #fff; }
        .scenario-card h4 { font-size: 1.15rem; margin-bottom: 10px; color: var(--secondary); }
        .scenario-card p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; }

        /* ===== Process Timeline ===== */
        .process-section { background: var(--bg-white); }
        .process-steps {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            padding-left: 40px;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--primary), var(--primary-light), var(--primary));
            border-radius: 4px;
        }
        .step-item {
            position: relative;
            padding: 0 0 48px 40px;
        }
        .step-item:last-child { padding-bottom: 0; }
        .step-item .step-dot {
            position: absolute;
            left: -32px;
            top: 4px;
            width: 20px;
            height: 20px;
            background: var(--primary);
            border-radius: 50%;
            border: 4px solid var(--bg-white);
            box-shadow: 0 0 0 3px var(--primary);
        }
        .step-item .step-label {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 2px 16px;
            border-radius: 20px;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .step-item h4 { font-size: 1.2rem; margin-bottom: 6px; color: var(--secondary); }
        .step-item p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; max-width: 600px; }

        /* ===== FAQ ===== */
        .faq-section { background: var(--bg-light); }
        .faq-accordion { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            margin-bottom: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            padding: 20px 28px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--secondary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            user-select: none;
            transition: var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-family);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { transition: var(--transition); font-size: 1.2rem; color: var(--primary); }
        .faq-item.active .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 28px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 600px;
            padding: 0 28px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--secondary);
            color: #fff;
            text-align: center;
            padding: 80px 0;
        }
        .cta-section h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }
        .cta-form { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; max-width: 640px; margin: 0 auto; }
        .cta-form input, .cta-form select {
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255,255,255,0.2);
            background: rgba(255,255,255,0.1);
            color: #fff;
            font-size: 0.95rem;
            transition: var(--transition);
            font-family: var(--font-family);
        }
        .cta-form input::placeholder { color: rgba(255,255,255,0.5); }
        .cta-form input:focus, .cta-form select:focus {
            outline: none;
            border-color: var(--primary);
            background: rgba(255,255,255,0.15);
            box-shadow: 0 0 0 3px rgba(255,107,53,0.2);
        }
        .cta-form select option { color: var(--text-dark); background: #fff; }
        .cta-form .btn-primary { padding: 14px 40px; font-size: 1rem; }

        /* ===== Footer ===== */
        .site-footer {
            background: #1a1a2e;
            color: rgba(255,255,255,0.75);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: #fff; font-size: 1.25rem; margin-bottom: 16px; display: inline-flex; }
        .footer-brand .logo i { color: var(--primary); }
        .footer-brand .logo span { color: #fff; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 360px; }
        .site-footer h5 { color: #fff; font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
        .site-footer ul li { margin-bottom: 10px; }
        .site-footer ul li a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: var(--transition); }
        .site-footer ul li a:hover { color: var(--primary); padding-left: 4px; }
        .site-footer ul li a i { width: 20px; margin-right: 6px; color: var(--primary); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); margin: 0 8px; }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .hero-content h1 { font-size: 2.4rem; }
            .capability-item, .capability-item.reverse { flex-direction: column; gap: 32px; }
            .scenario-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            .nav-menu { display: none; }
            .nav-menu.open { display: flex; flex-direction: column; position: absolute; top: var(--header-height); left: 0; right: 0; background: var(--bg-white); padding: 20px 24px; gap: 16px; border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-md); z-index: 999; }
            .nav-toggle { display: block; }
            .hero-section { min-height: 400px; }
            .hero-content h1 { font-size: 2rem; }
            .hero-content .subtitle { font-size: 1rem; }
            .section-padding { padding: 56px 0; }
            .scenario-grid { grid-template-columns: 1fr; }
            .process-steps { padding-left: 24px; }
            .step-item { padding-left: 24px; }
            .step-item .step-dot { left: -16px; width: 16px; height: 16px; }
            .cta-form { flex-direction: column; }
            .cta-form input, .cta-form select, .cta-form .btn-primary { width: 100%; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .site-header .container { padding: 0 16px; }
        }
        @media (max-width: 520px) {
            .hero-content h1 { font-size: 1.6rem; }
            .hero-content .subtitle { font-size: 0.95rem; }
            .btn-primary, .btn-outline { padding: 12px 24px; font-size: 0.9rem; width: 100%; justify-content: center; }
            .hero-actions { flex-direction: column; }
            .section-title h2 { font-size: 1.5rem; }
            .capability-text h3 { font-size: 1.3rem; }
            .faq-question { font-size: 0.95rem; padding: 16px 20px; }
            .faq-answer { padding: 0 20px; }
            .faq-item.active .faq-answer { padding: 0 20px 18px; }
        }

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

        /* ===== Empty State for future CMS ===== */
        .empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); font-size: 1.1rem; background: var(--bg-light); border-radius: var(--radius); }
        .empty-state i { font-size: 3rem; color: var(--text-light); margin-bottom: 16px; display: block; }