/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1A2B3C;
            --primary-dark: #0F1A26;
            --primary-light: #2A3F54;
            --accent: #E8A838;
            --accent-hover: #D4942F;
            --accent-light: rgba(232, 168, 56, 0.15);
            --bg-body: #F7F9FC;
            --bg-card: #FFFFFF;
            --bg-section-alt: #EBF0F5;
            --bg-hero: linear-gradient(135deg, #1A2B3C 0%, #0F1A26 60%, #162233 100%);
            --text-heading: #1A2B3C;
            --text-body: #2E3A4C;
            --text-muted: #6B7A8C;
            --text-light: #C8D0DC;
            --text-white: #FFFFFF;
            --border-color: #CFD8E4;
            --border-accent: rgba(232, 168, 56, 0.25);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 43, 60, 0.08);
            --shadow-md: 0 6px 20px rgba(26, 43, 60, 0.10);
            --shadow-lg: 0 12px 36px rgba(26, 43, 60, 0.14);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --nav-width: 80px;
            --container-max: 1200px;
            --gap: 24px;
            --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            background: var(--bg-body);
            -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(--accent);
        }

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

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-heading);
            font-weight: 600;
            line-height: 1.3;
        }

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

        /* ===== Layout with Left Sidebar ===== */
        .app-layout {
            display: flex;
            min-height: 100vh;
        }

        .main-content {
            flex: 1;
            margin-left: var(--nav-width);
            min-width: 0;
        }

        /* ===== Left Sidebar Navigation (Desktop) ===== */
        .side-nav {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: var(--nav-width);
            background: var(--primary);
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 20px 0;
            z-index: 1000;
            box-shadow: 2px 0 12px rgba(0,0,0,0.15);
        }

        .side-nav .logo-wrap {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin-bottom: 32px;
        }

        .side-nav .logo-icon {
            width: 42px;
            height: 42px;
            background: var(--accent);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            margin-bottom: 4px;
        }

        .side-nav .logo-text {
            font-size: 10px;
            letter-spacing: 1px;
            color: var(--text-light);
            text-transform: uppercase;
            font-weight: 400;
            margin-top: 2px;
        }

        .side-nav .nav-items {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            flex: 1;
            width: 100%;
            padding: 0 8px;
        }

        .side-nav .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 60px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            font-size: 12px;
            gap: 2px;
        }

        .side-nav .nav-item i {
            font-size: 22px;
            transition: var(--transition);
        }

        .side-nav .nav-item span {
            font-size: 10px;
            line-height: 1.2;
            opacity: 0.8;
        }

        .side-nav .nav-item:hover {
            color: var(--accent);
            background: rgba(232, 168, 56, 0.1);
        }

        .side-nav .nav-item.active {
            color: var(--accent);
            background: rgba(232, 168, 56, 0.12);
            border-left: 3px solid var(--accent);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            width: calc(100% + 4px);
        }

        .side-nav .nav-bottom {
            margin-top: auto;
            padding-top: 16px;
            border-top: 1px solid rgba(255,255,255,0.06);
            width: 100%;
            display: flex;
            justify-content: center;
        }

        .side-nav .nav-bottom .nav-item {
            width: 48px;
            height: 48px;
        }

        /* ===== Mobile Top Bar ===== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--primary);
            z-index: 1001;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 8px rgba(0,0,0,0.2);
        }

        .mobile-topbar .logo-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .logo-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
        }

        .mobile-topbar .brand-name {
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            letter-spacing: 0.5px;
        }

        .mobile-topbar .hamburger {
            background: none;
            border: none;
            color: #fff;
            font-size: 28px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .mobile-topbar .hamburger:hover {
            background: rgba(255,255,255,0.08);
        }

        /* ===== Mobile Drawer ===== */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(26, 43, 60, 0.95);
            backdrop-filter: blur(8px);
            z-index: 1002;
            padding: 80px 24px 32px;
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            gap: 12px;
            overflow-y: auto;
        }

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

        .mobile-drawer .drawer-close {
            position: absolute;
            top: 12px;
            right: 16px;
            background: none;
            border: none;
            color: #fff;
            font-size: 32px;
            cursor: pointer;
        }

        .mobile-drawer .drawer-item {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-light);
            font-size: 18px;
            padding: 14px 24px;
            width: 100%;
            max-width: 320px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .mobile-drawer .drawer-item i {
            width: 28px;
            font-size: 20px;
            text-align: center;
        }

        .mobile-drawer .drawer-item:hover,
        .mobile-drawer .drawer-item.active {
            color: var(--accent);
            background: rgba(232, 168, 56, 0.12);
        }

        /* ===== Hero Section ===== */
        .hero {
            background: var(--bg-hero);
            padding: 100px 20px 80px;
            position: relative;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(232,168,56,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(232,168,56,0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 900px;
        }

        .hero h1 {
            font-size: 48px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            line-height: 1.2;
        }

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

        .hero .subtitle {
            font-size: 18px;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 720px;
            margin: 0 auto 36px;
        }

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

        .hero .hero-bg-img {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            object-fit: cover;
            opacity: 0.08;
            z-index: 0;
            width: 100%;
            height: 100%;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(232, 168, 56, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.35);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(232, 168, 56, 0.08);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

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

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

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

        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-title h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .section-title p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-title .title-accent {
            display: inline-block;
            width: 48px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
            margin-top: 8px;
        }

        /* ===== Services Section (2-column icon list) ===== */
        .services-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            gap: 20px;
            align-items: flex-start;
            border: 1px solid transparent;
        }

        .service-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--border-accent);
        }

        .service-card .icon-box {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--accent);
        }

        .service-card .card-body h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .service-card .card-body p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }

        .service-card .card-body .learn-more {
            display: inline-block;
            margin-top: 10px;
            font-weight: 500;
            color: var(--accent);
            font-size: 14px;
            transition: var(--transition);
        }
        .service-card .card-body .learn-more i {
            font-size: 12px;
            margin-left: 4px;
        }
        .service-card .card-body .learn-more:hover {
            color: var(--accent-hover);
            gap: 8px;
        }

        /* ===== Stats Section ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item {
            padding: 28px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .stat-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .stat-item .number {
            font-size: 48px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .stat-item .label {
            font-size: 15px;
            color: var(--text-muted);
            font-weight: 400;
        }

        /* ===== Cases Section (交错图卡) ===== */
        .cases-list {
            display: flex;
            flex-direction: column;
            gap: 40px;
        }

        .case-card {
            display: flex;
            gap: 32px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            align-items: center;
        }

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

        .case-card .case-img {
            width: 38%;
            min-height: 260px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .case-card .case-info {
            padding: 28px 32px 28px 0;
            flex: 1;
        }

        .case-card .case-info h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .case-card .case-info p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .case-card .case-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }

        .case-card .case-tags .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            background: var(--accent-light);
            color: var(--accent-hover);
        }

        .case-card .case-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
            color: var(--accent);
            font-size: 14px;
        }
        .case-card .case-btn i {
            font-size: 12px;
            transition: var(--transition);
        }
        .case-card .case-btn:hover i {
            transform: translateX(4px);
        }

        .case-card:nth-child(even) {
            flex-direction: row-reverse;
        }
        .case-card:nth-child(even) .case-info {
            padding: 28px 0 28px 32px;
        }

        /* ===== Solutions Section (流程+大图) ===== */
        .solutions-wrap {
            display: flex;
            gap: 48px;
            align-items: center;
        }

        .solutions-steps {
            flex: 1;
        }

        .solution-step {
            display: flex;
            gap: 16px;
            margin-bottom: 28px;
            align-items: flex-start;
        }

        .solution-step:last-child {
            margin-bottom: 0;
        }

        .solution-step .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .solution-step .step-body h4 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .solution-step .step-body p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.6;
        }

        .solutions-image {
            flex: 1;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            min-height: 320px;
            object-fit: cover;
        }

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

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

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

        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 500;
            font-size: 16px;
            color: var(--text-heading);
            transition: var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }

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

        .faq-item .faq-question .faq-icon {
            font-size: 20px;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }

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

        .faq-item .faq-answer p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--bg-hero);
            padding: 72px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(232,168,56,0.06) 0%, transparent 70%);
            border-radius: 50%;
        }

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

        .cta-section h2 {
            font-size: 36px;
            color: #fff;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: var(--text-light);
            font-size: 17px;
            max-width: 560px;
            margin: 0 auto 32px;
        }

        .cta-section .btn-primary {
            font-size: 17px;
            padding: 14px 40px;
        }

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

        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            border: 1px solid transparent;
        }

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

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

        .news-card .news-body {
            padding: 20px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-card .news-meta .cat-tag {
            display: inline-block;
            padding: 0 10px;
            border-radius: 12px;
            background: var(--accent-light);
            color: var(--accent-hover);
            font-weight: 500;
            font-size: 12px;
        }

        .news-card .news-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-body p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
            flex: 1;
        }

        .news-card .news-body .read-link {
            font-weight: 500;
            color: var(--accent);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-card .news-body .read-link i {
            font-size: 12px;
            transition: var(--transition);
        }
        .news-card .news-body .read-link:hover i {
            transform: translateX(4px);
        }

        .news-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            grid-column: 1 / -1;
        }

        .news-empty i {
            font-size: 56px;
            color: var(--border-color);
            margin-bottom: 16px;
            display: block;
        }

        .news-empty p {
            font-size: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: var(--text-light);
            padding: 48px 0 32px;
        }

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

        .footer-brand .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand h4 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 8px;
        }

        .footer-brand p {
            font-size: 14px;
            opacity: 0.75;
            max-width: 280px;
            line-height: 1.7;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .footer-col ul li a {
            color: var(--text-light);
            font-size: 14px;
            opacity: 0.75;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            opacity: 1;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            opacity: 0.6;
        }

        .footer-bottom .footer-links {
            display: flex;
            gap: 16px;
        }

        .footer-bottom .footer-links a {
            color: var(--text-light);
            font-size: 13px;
            transition: var(--transition);
        }
        .footer-bottom .footer-links a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .services-grid {
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .case-card .case-img {
                width: 45%;
                min-height: 200px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-width: 0px;
            }

            .side-nav {
                display: none;
            }

            .mobile-topbar {
                display: flex;
            }

            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }

            .hero {
                padding: 60px 16px 50px;
                min-height: auto;
            }

            .hero h1 {
                font-size: 30px;
            }

            .hero .subtitle {
                font-size: 16px;
            }

            .section {
                padding: 48px 0;
            }

            .section-title h2 {
                font-size: 26px;
            }

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

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-item .number {
                font-size: 36px;
            }

            .case-card {
                flex-direction: column !important;
            }

            .case-card .case-img {
                width: 100%;
                min-height: 180px;
            }

            .case-card .case-info {
                padding: 20px !important;
            }

            .case-card:nth-child(even) .case-info {
                padding: 20px !important;
            }

            .solutions-wrap {
                flex-direction: column;
                gap: 28px;
            }

            .solutions-image {
                width: 100%;
                min-height: 220px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 26px;
            }

            .hero .subtitle {
                font-size: 15px;
            }

            .hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                justify-content: center;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-item {
                padding: 20px 12px;
            }

            .stat-item .number {
                font-size: 30px;
            }

            .section-title h2 {
                font-size: 22px;
            }

            .service-card {
                flex-direction: column;
                align-items: flex-start;
            }

            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
        }

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

        /* ===== Loading Spinner ===== */
        .spinner {
            display: inline-block;
            width: 24px;
            height: 24px;
            border: 3px solid var(--border-color);
            border-top-color: var(--accent);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* ===== Misc ===== */
        .text-accent {
            color: var(--accent);
        }

        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }

/* roulang page: article */
:root {
    --primary: #1A2B3C;
    --primary-dark: #0F1A26;
    --secondary: #E8A838;
    --secondary-hover: #D4942F;
    --secondary-active: #BF8526;
    --bg: #F7F9FC;
    --bg-light: #EBF0F5;
    --text-title: #1A2B3C;
    --text-body: #2E3A4C;
    --text-muted: #6B7A8C;
    --text-light: #C8D0DC;
    --border: #CFD8E4;
    --card-shadow: 0 2px 8px rgba(26,43,60,0.08);
    --card-shadow-hover: 0 6px 16px rgba(26,43,60,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --sidebar-width: 80px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --gap: 24px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text-body);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    min-height: 100vh;
}
a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--secondary-hover); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { color: var(--text-title); font-weight: 600; line-height: 1.3; }
h1 { font-size: 42px; font-weight: 700; letter-spacing: -0.5px; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }
h4 { font-size: 18px; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ===== Sidebar Navigation ===== */
.side-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 0 16px;
    z-index: 1000;
    transition: transform var(--transition);
    overflow: hidden;
}
.side-nav .logo-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    margin-bottom: 32px;
}
.side-nav .logo-icon {
    width: 40px;
    height: 40px;
    background: var(--secondary);
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0;
    line-height: 1;
}
.side-nav .logo-text {
    font-size: 11px;
    font-weight: 600;
    color: rgba(255,255,255,0.7);
    text-transform: uppercase;
    letter-spacing: 2px;
}
.side-nav .nav-items {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    flex: 1;
    width: 100%;
    padding: 0 8px;
}
.side-nav .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    width: 64px;
    padding: 10px 0;
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.55);
    font-size: 11px;
    transition: var(--transition);
    position: relative;
    text-align: center;
    border-left: 3px solid transparent;
}
.side-nav .nav-item i { font-size: 20px; margin-bottom: 1px; }
.side-nav .nav-item span { font-size: 10px; letter-spacing: 0.3px; white-space: nowrap; }
.side-nav .nav-item:hover { color: var(--secondary); background: rgba(232,168,56,0.08); }
.side-nav .nav-item.active { color: var(--secondary); background: rgba(232,168,56,0.10); border-left-color: var(--secondary); }
.side-nav .nav-bottom { width: 100%; display: flex; justify-content: center; padding-top: 8px; border-top: 1px solid rgba(255,255,255,0.06); margin-top: auto; }

/* ===== Mobile Header ===== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--primary);
    z-index: 999;
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.mobile-header .logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
}
.mobile-header .logo-icon {
    width: 34px;
    height: 34px;
    background: var(--secondary);
    color: #fff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 17px;
    font-weight: 700;
}
.mobile-header .logo-text {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    letter-spacing: 1px;
}
.mobile-header .hamburger {
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.mobile-header .hamburger:hover { background: rgba(255,255,255,0.08); }
.drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(26,43,60,0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}
.drawer-overlay.open { opacity: 1; pointer-events: auto; }
.drawer-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 260px;
    background: var(--primary);
    z-index: 1001;
    transform: translateX(-100%);
    transition: transform var(--transition);
    padding: 24px 20px;
    flex-direction: column;
}
.drawer-menu.open { transform: translateX(0); }
.drawer-menu .drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.drawer-menu .drawer-header .logo-wrap { display: flex; align-items: center; gap: 10px; }
.drawer-menu .drawer-header .logo-icon {
    width: 34px; height: 34px; background: var(--secondary); color: #fff;
    border-radius: 8px; display: flex; align-items: center; justify-content: center;
    font-size: 17px; font-weight: 700;
}
.drawer-menu .drawer-header .logo-text { font-size: 15px; font-weight: 600; color: #fff; }
.drawer-menu .drawer-close {
    width: 36px; height: 36px; background: transparent; border: none; color: rgba(255,255,255,0.6);
    font-size: 22px; cursor: pointer; border-radius: 6px; display: flex; align-items: center; justify-content: center;
}
.drawer-menu .drawer-close:hover { background: rgba(255,255,255,0.08); color: #fff; }
.drawer-menu .drawer-nav { display: flex; flex-direction: column; gap: 2px; }
.drawer-menu .drawer-nav .nav-item {
    display: flex; align-items: center; gap: 14px; padding: 12px 16px;
    border-radius: var(--radius-sm); color: rgba(255,255,255,0.6); font-size: 15px;
    transition: var(--transition); border-left: 3px solid transparent;
}
.drawer-menu .drawer-nav .nav-item i { font-size: 18px; width: 22px; text-align: center; }
.drawer-menu .drawer-nav .nav-item:hover { color: var(--secondary); background: rgba(232,168,56,0.08); }
.drawer-menu .drawer-nav .nav-item.active { color: var(--secondary); background: rgba(232,168,56,0.10); border-left-color: var(--secondary); }

/* ===== Main Content ===== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.article-page { padding: 40px 0 60px; flex: 1; }

/* ===== Breadcrumb ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 10px;
    margin-bottom: 28px;
    font-size: 14px;
    color: var(--text-muted);
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}
.breadcrumb a { color: var(--text-muted); font-weight: 400; }
.breadcrumb a:hover { color: var(--secondary); }
.breadcrumb .sep { color: var(--border); font-size: 12px; }
.breadcrumb .current { color: var(--text-title); font-weight: 500; }

/* ===== Article Header ===== */
.article-header { margin-bottom: 40px; }
.article-header h1 {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-title);
    margin-bottom: 16px;
    letter-spacing: -0.3px;
}
.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px 24px;
    font-size: 14px;
    color: var(--text-muted);
}
.article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
.article-meta .meta-item i { font-size: 14px; color: var(--secondary); }
.article-meta .category-tag {
    display: inline-block;
    padding: 3px 14px;
    background: rgba(232,168,56,0.12);
    color: var(--secondary-hover);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

/* ===== Article Content ===== */
.article-content {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    padding: 48px 52px;
    margin-bottom: 40px;
    line-height: 1.9;
    font-size: 16px;
    color: var(--text-body);
}
.article-content p { margin-bottom: 1.2em; }
.article-content h2 { margin-top: 1.6em; margin-bottom: 0.6em; font-size: 26px; }
.article-content h3 { margin-top: 1.4em; margin-bottom: 0.5em; font-size: 20px; }
.article-content ul, .article-content ol { margin-bottom: 1.2em; padding-left: 1.6em; }
.article-content ul li { list-style: disc; margin-bottom: 0.4em; }
.article-content ol li { list-style: decimal; margin-bottom: 0.4em; }
.article-content blockquote {
    border-left: 4px solid var(--secondary);
    background: var(--bg);
    padding: 16px 24px;
    margin: 1.2em 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-muted);
    font-style: normal;
}
.article-content img { border-radius: var(--radius-sm); margin: 1.2em auto; }
.article-content a { font-weight: 500; text-decoration: underline; }
.article-content code {
    background: var(--bg-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--primary);
}
.article-content pre {
    background: var(--primary);
    color: #e8e8e8;
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.6;
    margin: 1.2em 0;
}
.article-content pre code { background: transparent; padding: 0; color: inherit; }

/* ===== Not Found ===== */
.not-found-box {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    padding: 80px 40px;
    text-align: center;
}
.not-found-box i { font-size: 56px; color: var(--border); margin-bottom: 20px; }
.not-found-box h2 { font-size: 24px; color: var(--text-title); margin-bottom: 12px; }
.not-found-box p { color: var(--text-muted); margin-bottom: 24px; }
.not-found-box .btn { display: inline-flex; }

/* ===== Related Posts ===== */
.related-posts { margin-top: 20px; }
.related-posts h2 {
    font-size: 26px;
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.related-posts h2 i { color: var(--secondary); font-size: 22px; }
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}
.related-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    cursor: default;
}
.related-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-4px); border: 1px solid rgba(232,168,56,0.2); }
.related-card .card-img {
    width: 100%;
    height: 190px;
    object-fit: cover;
    display: block;
}
.related-card .card-body { padding: 20px 22px 24px; }
.related-card .card-body h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.related-card .card-body h3 a { color: var(--text-title); }
.related-card .card-body h3 a:hover { color: var(--secondary); }
.related-card .card-body p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
}
.related-card .card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-muted); }
.related-card .card-meta .tag { background: rgba(232,168,56,0.10); color: var(--secondary-hover); padding: 2px 12px; border-radius: 12px; font-size: 12px; }

/* ===== Back Button ===== */
.back-section { margin-top: 32px; text-align: center; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    font-family: var(--font-family);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1.4;
    text-decoration: none;
}
.btn-primary {
    background: var(--secondary);
    color: #fff;
}
.btn-primary:hover { background: var(--secondary-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(232,168,56,0.35); }
.btn-primary:active { background: var(--secondary-active); transform: translateY(0); }
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-back {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 10px 28px;
}
.btn-back:hover { border-color: var(--secondary); color: var(--secondary); }

/* ===== Footer ===== */
.site-footer {
    background: var(--primary);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
    margin-top: auto;
}
.site-footer .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.site-footer .footer-brand .logo-icon {
    width: 40px; height: 40px; background: var(--secondary); color: #fff;
    border-radius: 10px; display: flex; align-items: center; justify-content: center;
    font-size: 20px; font-weight: 700; margin-bottom: 12px;
}
.site-footer .footer-brand h4 { color: #fff; font-size: 18px; margin-bottom: 10px; }
.site-footer .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
.site-footer .footer-col h5 { color: #fff; font-size: 15px; margin-bottom: 16px; font-weight: 600; }
.site-footer .footer-col ul li { margin-bottom: 10px; }
.site-footer .footer-col ul li a { color: rgba(255,255,255,0.55); font-size: 14px; transition: var(--transition); }
.site-footer .footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
.site-footer .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    flex-wrap: wrap;
    gap: 12px;
}
.site-footer .footer-bottom .footer-links { display: flex; gap: 20px; }
.site-footer .footer-bottom .footer-links a { color: rgba(255,255,255,0.4); font-size: 13px; }
.site-footer .footer-bottom .footer-links a:hover { color: var(--secondary); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .article-content { padding: 36px 32px; }
    .related-grid { gap: 18px; }
    .related-card .card-img { height: 160px; }
    .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 768px) {
    body { flex-direction: column; }
    .side-nav { display: none; }
    .mobile-header { display: flex; }
    .drawer-overlay { display: block; }
    .drawer-menu { display: flex; }
    .main-content { margin-left: 0; padding-top: 56px; }
    .article-page { padding: 24px 0 40px; }
    .article-header h1 { font-size: 26px; }
    .article-content { padding: 24px 20px; border-radius: var(--radius-sm); }
    .article-content h2 { font-size: 22px; }
    .article-content h3 { font-size: 18px; }
    .breadcrumb { font-size: 13px; margin-bottom: 20px; }
    .related-grid { grid-template-columns: 1fr; gap: 16px; }
    .related-card .card-img { height: 200px; }
    .related-posts h2 { font-size: 22px; }
    .site-footer { padding: 40px 0 0; }
    .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .site-footer .footer-bottom { flex-direction: column; text-align: center; }
    .site-footer .footer-bottom .footer-links { justify-content: center; flex-wrap: wrap; gap: 14px; }
    .not-found-box { padding: 50px 24px; }
    .not-found-box i { font-size: 40px; }
}
@media (max-width: 520px) {
    .article-header h1 { font-size: 22px; }
    .article-content { padding: 18px 16px; font-size: 15px; }
    .article-meta { gap: 10px 14px; font-size: 13px; }
    .container { padding: 0 14px; }
    .btn { padding: 10px 20px; font-size: 14px; }
    .related-card .card-img { height: 170px; }
    .related-card .card-body { padding: 16px 18px 20px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1A2B3C;
            --primary-dark: #0F1A26;
            --primary-light: #2E3A4C;
            --accent: #E8A838;
            --accent-hover: #D4942F;
            --accent-active: #BF8228;
            --accent-light: rgba(232,168,56,0.15);
            --bg: #F7F9FC;
            --bg-card: #FFFFFF;
            --bg-alt: #EBF0F5;
            --text-title: #1A2B3C;
            --text-body: #2E3A4C;
            --text-muted: #6B7A8C;
            --text-light: #C8D0DC;
            --text-white: #FFFFFF;
            --border: #CFD8E4;
            --border-light: rgba(232,168,56,0.2);
            --shadow-sm: 0 2px 8px rgba(26,43,60,0.08);
            --shadow-md: 0 6px 20px rgba(26,43,60,0.10);
            --shadow-lg: 0 12px 32px rgba(26,43,60,0.14);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --nav-width: 80px;
            --header-height: 60px;
            --spacing-section: 80px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            background: var(--bg);
            padding-left: var(--nav-width);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-title); font-weight: 600; line-height: 1.3; }

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

        /* ===== Left Navigation (App Shell) ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--primary);
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 20px 0 16px;
            z-index: 1000;
            transition: var(--transition);
            overflow: hidden;
        }
        .side-nav .logo-wrap {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            margin-bottom: 32px;
        }
        .side-nav .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        .side-nav .logo-text {
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--text-light);
        }
        .side-nav .nav-items {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            flex: 1;
            width: 100%;
            padding: 0 8px;
        }
        .side-nav .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 56px;
            border-radius: var(--radius-md);
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
            position: relative;
            gap: 4px;
            font-size: 10px;
            font-weight: 500;
        }
        .side-nav .nav-item i {
            font-size: 20px;
            transition: var(--transition);
        }
        .side-nav .nav-item span {
            font-size: 10px;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .side-nav .nav-item:hover {
            color: var(--accent);
            background: rgba(232,168,56,0.12);
        }
        .side-nav .nav-item.active {
            color: var(--accent);
            background: rgba(232,168,56,0.15);
            box-shadow: inset 3px 0 0 var(--accent);
        }
        .side-nav .nav-bottom {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding-top: 12px;
            border-top: 1px solid rgba(255,255,255,0.08);
            width: 100%;
            padding: 12px 8px 0;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--primary);
            z-index: 999;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .mobile-header .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mobile-header .logo-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 900;
            color: var(--text-white);
        }
        .mobile-header .logo-text {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .mobile-header .hamburger {
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-size: 24px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .mobile-header .hamburger:hover { background: rgba(255,255,255,0.08); }

        /* ===== Mobile Drawer ===== */
        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(15,26,38,0.7);
            z-index: 998;
            backdrop-filter: blur(4px);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .drawer-overlay.open { opacity: 1; }
        .drawer-menu {
            position: fixed;
            top: 0;
            left: -280px;
            width: 260px;
            height: 100vh;
            background: var(--primary);
            z-index: 1001;
            padding: 24px 20px;
            transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            overflow-y: auto;
            box-shadow: 4px 0 24px rgba(0,0,0,0.3);
        }
        .drawer-menu.open { left: 0; }
        .drawer-menu .drawer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 32px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .drawer-menu .drawer-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 900;
            color: var(--text-white);
        }
        .drawer-menu .drawer-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-white);
        }
        .drawer-menu .drawer-nav { display: flex; flex-direction: column; gap: 6px; }
        .drawer-menu .drawer-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--text-light);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
        }
        .drawer-menu .drawer-nav a i { width: 22px; font-size: 18px; }
        .drawer-menu .drawer-nav a:hover { background: rgba(232,168,56,0.12); color: var(--accent); }
        .drawer-menu .drawer-nav a.active { background: rgba(232,168,56,0.15); color: var(--accent); }
        .drawer-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 36px;
            height: 36px;
            background: rgba(255,255,255,0.06);
            border: none;
            color: var(--text-light);
            font-size: 20px;
            cursor: pointer;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .drawer-close:hover { background: rgba(255,255,255,0.12); color: var(--text-white); }

        /* ===== Main Content ===== */
        .main-content {
            min-height: 100vh;
            padding-top: 0;
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            padding: 100px 0 90px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 70%, #0B1520 100%);
            overflow: hidden;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(232,168,56,0.08) 0%, transparent 70%);
            z-index: 0;
        }
        .hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .hero h1 {
            font-size: 48px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            line-height: 1.15;
        }
        .hero h1 .highlight { color: var(--accent); }
        .hero .subtitle {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto 36px;
            font-weight: 300;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-actions .btn { min-width: 160px; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            cursor: pointer;
            border: 2px solid transparent;
            transition: var(--transition);
            letter-spacing: 0.3px;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-white);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(232,168,56,0.35);
        }
        .btn-primary:active {
            background: var(--accent-active);
            transform: translateY(0);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.10);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-outline-light:active { transform: translateY(0); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        /* ===== Section Commons ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt { background: var(--bg-alt); }
        .section-white { background: var(--bg-card); }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-title h2 {
            font-size: 34px;
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-title .section-desc {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .title-underline {
            display: inline-block;
            width: 50px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin-top: 8px;
        }

        /* ===== Overview / Solution Intro ===== */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            margin-top: 40px;
        }
        .overview-text h3 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--text-title);
        }
        .overview-text p {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-body);
            margin-bottom: 16px;
        }
        .overview-text .feature-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 20px;
        }
        .overview-text .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-body);
        }
        .overview-text .feature-list li i {
            color: var(--accent);
            font-size: 18px;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .overview-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--bg-alt);
        }
        .overview-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            transition: var(--transition);
        }
        .overview-image:hover img { transform: scale(1.02); }

        /* ===== Feature Cards ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid transparent;
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-light);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 18px;
            background: var(--accent-light);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent);
            transition: var(--transition);
        }
        .feature-card:hover .icon {
            background: var(--accent);
            color: var(--text-white);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Scenarios ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 40px;
        }
        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-light);
        }
        .scenario-card .scenario-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: var(--transition);
        }
        .scenario-card:hover .scenario-img { transform: scale(1.03); }
        .scenario-card .scenario-body {
            padding: 24px 22px 26px;
        }
        .scenario-card .scenario-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .scenario-card .scenario-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .scenario-card .tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--accent-light);
            color: var(--accent-hover);
            font-size: 12px;
            font-weight: 600;
            border-radius: 20px;
        }

        /* ===== Process / Steps ===== */
        .process-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            margin-top: 40px;
        }
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .step-number {
            width: 44px;
            height: 44px;
            min-width: 44px;
            background: var(--accent);
            color: var(--text-white);
            font-size: 18px;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(232,168,56,0.3);
        }
        .step-content h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .step-content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .process-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--bg-alt);
        }
        .process-image img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: var(--transition);
        }
        .process-image:hover img { transform: scale(1.02); }

        /* ===== FAQ Accordion ===== */
        .faq-list {
            max-width: 800px;
            margin: 40px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-item.open { border-color: var(--accent); }
        .faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 16px;
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover { background: rgba(232,168,56,0.03); }
        .faq-question h4 {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-title);
            flex: 1;
        }
        .faq-question .faq-toggle {
            font-size: 18px;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-toggle { transform: rotate(45deg); }
        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(232,168,56,0.06) 0%, transparent 70%);
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-primary {
            font-size: 18px;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: var(--text-light);
            padding: 60px 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .site-footer .footer-brand h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-light);
            opacity: 0.8;
        }
        .site-footer .footer-col h5 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .site-footer .footer-col ul li { margin-bottom: 10px; }
        .site-footer .footer-col ul li a {
            font-size: 14px;
            color: var(--text-light);
            opacity: 0.75;
            transition: var(--transition);
        }
        .site-footer .footer-col ul li a:hover { opacity: 1; color: var(--accent); }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-light);
            opacity: 0.6;
        }
        .site-footer .footer-bottom .footer-links {
            display: flex;
            gap: 20px;
        }
        .site-footer .footer-bottom .footer-links a {
            color: var(--text-light);
            opacity: 0.7;
            font-size: 13px;
        }
        .site-footer .footer-bottom .footer-links a:hover { opacity: 1; color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .overview-grid { gap: 40px; }
            .process-wrapper { gap: 36px; }
        }

        @media (max-width: 768px) {
            body { padding-left: 0; padding-top: var(--header-height); }
            .side-nav { display: none; }
            .mobile-header { display: flex; }
            .drawer-overlay.open { display: block; }

            :root { --spacing-section: 50px; }
            .hero { padding: 60px 0 60px; }
            .hero h1 { font-size: 30px; }
            .hero .subtitle { font-size: 16px; }
            .hero-actions .btn { min-width: 140px; padding: 12px 24px; font-size: 15px; }

            .section-title h2 { font-size: 26px; }
            .section-title .section-desc { font-size: 15px; }

            .overview-grid { grid-template-columns: 1fr; gap: 30px; }
            .overview-text h3 { font-size: 22px; }
            .overview-image img { height: 240px; }

            .features-grid { grid-template-columns: 1fr; gap: 16px; }
            .feature-card { padding: 24px 20px; }

            .scenarios-grid { grid-template-columns: 1fr; gap: 20px; }
            .scenario-card .scenario-img { height: 160px; }

            .process-wrapper { grid-template-columns: 1fr; gap: 30px; }
            .process-image img { height: 220px; }
            .steps-list { gap: 22px; }

            .faq-question { padding: 14px 16px; }
            .faq-question h4 { font-size: 15px; }
            .faq-answer p { font-size: 14px; }

            .cta-section { padding: 50px 0; }
            .cta-section h2 { font-size: 26px; }
            .cta-section p { font-size: 15px; }
            .cta-section .btn-primary { font-size: 16px; padding: 14px 32px; }

            .site-footer { padding: 40px 0 0; }
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .site-footer .footer-bottom { flex-direction: column; text-align: center; }
            .site-footer .footer-bottom .footer-links { justify-content: center; flex-wrap: wrap; gap: 14px; }

            .container { padding: 0 16px; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 24px; }
            .hero .subtitle { font-size: 14px; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; max-width: 260px; }
            .section-title h2 { font-size: 22px; }
            .overview-text h3 { font-size: 20px; }
            .feature-card h3 { font-size: 16px; }
            .scenario-card .scenario-body h3 { font-size: 16px; }
            .step-content h4 { font-size: 15px; }
            .cta-section h2 { font-size: 22px; }
        }

        /* ===== Utility ===== */
        .text-accent { color: var(--accent); }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .text-center { text-align: center; }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1A2B3C;
            --primary-dark: #0F1A26;
            --accent: #E8A838;
            --accent-hover: #D4942F;
            --accent-active: #C0842A;
            --bg: #F7F9FC;
            --bg-card: #FFFFFF;
            --bg-light: #EBF0F5;
            --text-heading: #1A2B3C;
            --text-body: #2E3A4C;
            --text-muted: #6B7A8C;
            --text-light: #C8D0DC;
            --border: #CFD8E4;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 2px 8px rgba(26, 43, 60, 0.08);
            --shadow-hover: 0 6px 16px rgba(26, 43, 60, 0.12);
            --shadow-lg: 0 12px 32px rgba(26, 43, 60, 0.15);
            --nav-width: 80px;
            --max-width: 1200px;
            --gap: 24px;
            --padding: 20px;
            --transition: 0.25s ease;
            --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            background: var(--bg);
            margin: 0;
            padding: 0;
            min-height: 100vh;
            display: flex;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-heading);
            font-weight: 600;
            line-height: 1.3;
        }

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

        /* ===== 左侧导航 (App Shell) ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--primary);
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 16px 0;
            z-index: 1000;
            transition: transform var(--transition);
            box-shadow: 2px 0 12px rgba(0, 0, 0, 0.15);
        }
        .side-nav .logo-wrap {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin-bottom: 32px;
            padding-top: 8px;
        }
        .side-nav .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 0;
            line-height: 1;
        }
        .side-nav .logo-text {
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-top: 6px;
            opacity: 0.8;
        }
        .side-nav .nav-items {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            width: 100%;
            padding: 0 8px;
        }
        .side-nav .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 64px;
            padding: 10px 0 8px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-size: 11px;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition);
            position: relative;
            gap: 4px;
            border-left: 3px solid transparent;
        }
        .side-nav .nav-item i {
            font-size: 20px;
            transition: color var(--transition);
        }
        .side-nav .nav-item span {
            font-size: 10px;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .side-nav .nav-item:hover {
            color: #fff;
            background: rgba(232, 168, 56, 0.12);
        }
        .side-nav .nav-item:hover i {
            color: var(--accent);
        }
        .side-nav .nav-item.active {
            color: #fff;
            background: rgba(232, 168, 56, 0.08);
            border-left-color: var(--accent);
        }
        .side-nav .nav-item.active i {
            color: var(--accent);
        }
        .side-nav .nav-bottom {
            padding: 8px 0 16px;
            width: 100%;
            display: flex;
            justify-content: center;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .side-nav .nav-bottom .nav-item {
            width: 52px;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--primary);
            z-index: 999;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }
        .mobile-header .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mobile-header .logo-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-header .logo-text {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
        }
        .mobile-header .menu-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .mobile-header .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== 移动端抽屉 ===== */
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(26, 43, 60, 0.6);
            z-index: 998;
            opacity: 0;
            transition: opacity 0.3s;
            pointer-events: none;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer {
            position: fixed;
            top: 0;
            left: -280px;
            width: 260px;
            height: 100vh;
            background: var(--primary);
            z-index: 999;
            padding: 24px 20px;
            transition: left 0.3s ease;
            box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
            overflow-y: auto;
        }
        .drawer.open {
            left: 0;
        }
        .drawer .drawer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 32px;
            padding-bottom: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .drawer .drawer-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--accent);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .drawer .drawer-logo span {
            color: #fff;
            font-size: 18px;
            font-weight: 600;
        }
        .drawer .drawer-nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            font-weight: 500;
            transition: all var(--transition);
            margin-bottom: 4px;
        }
        .drawer .drawer-nav-item i {
            width: 22px;
            font-size: 18px;
            text-align: center;
        }
        .drawer .drawer-nav-item:hover {
            background: rgba(232, 168, 56, 0.12);
            color: #fff;
        }
        .drawer .drawer-nav-item.active {
            background: rgba(232, 168, 56, 0.08);
            color: #fff;
            border-left: 3px solid var(--accent);
        }
        .drawer .drawer-nav-item.active i {
            color: var(--accent);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #fff;
            text-align: center;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(232, 168, 56, 0.08) 0%, transparent 70%),
                linear-gradient(135deg, rgba(26, 43, 60, 0.85) 0%, rgba(15, 26, 38, 0.92) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero h1 {
            font-size: 42px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .hero h1 .highlight {
            color: var(--accent);
        }
        .hero .subtitle {
            font-size: 18px;
            line-height: 1.6;
            color: var(--text-light);
            max-width: 680px;
            margin: 0 auto 32px;
        }
        .hero .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero .btn-primary {
            background: var(--accent);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .hero .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(232, 168, 56, 0.3);
        }
        .hero .btn-primary:active {
            transform: translateY(0);
            background: var(--accent-active);
        }
        .hero .btn-secondary {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            border: 2px solid rgba(255, 255, 255, 0.3);
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .hero .btn-secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(232, 168, 56, 0.06);
            transform: translateY(-2px);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-light);
        }
        .section-title {
            font-size: 32px;
            font-weight: 600;
            text-align: center;
            margin-bottom: 12px;
            color: var(--text-heading);
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            text-align: center;
            max-width: 620px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-title-left {
            text-align: left;
            margin-bottom: 16px;
        }
        .section-subtitle-left {
            text-align: left;
            margin: 0 0 40px;
        }

        /* ===== 统计数据 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .stat-card {
            text-align: center;
            background: var(--bg-card);
            padding: 32px 16px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .stat-number {
            font-size: 48px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== 案例卡片（左右交错） ===== */
        .case-item {
            display: flex;
            gap: 40px;
            align-items: center;
            margin-bottom: 56px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .case-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .case-item:last-child {
            margin-bottom: 0;
        }
        .case-item.reverse {
            flex-direction: row-reverse;
        }
        .case-image {
            flex: 0 0 40%;
            min-height: 260px;
            background: var(--bg-light);
            overflow: hidden;
        }
        .case-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .case-content {
            flex: 1;
            padding: 32px 32px 32px 0;
        }
        .case-item.reverse .case-content {
            padding: 32px 0 32px 32px;
        }
        .case-content .case-tag {
            display: inline-block;
            background: rgba(232, 168, 56, 0.12);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .case-content h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-heading);
        }
        .case-content p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .case-content .case-metrics {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }
        .case-content .case-metrics .metric {
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .case-content .case-metrics .metric i {
            color: var(--accent);
        }
        .case-content .case-metrics .metric strong {
            color: var(--text-heading);
            font-weight: 600;
        }

        /* ===== 行业标签 ===== */
        .industry-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 8px;
        }
        .industry-tag {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 10px 24px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition);
            cursor: default;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .industry-tag i {
            color: var(--accent);
            font-size: 16px;
        }
        .industry-tag:hover {
            border-color: var(--accent);
            background: rgba(232, 168, 56, 0.04);
            box-shadow: 0 2px 8px rgba(232, 168, 56, 0.1);
            transform: translateY(-2px);
        }

        /* ===== 客户证言 ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .testimonial-card {
            background: var(--bg-card);
            padding: 32px 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            position: relative;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .testimonial-card::before {
            content: '\201C';
            font-size: 48px;
            color: var(--accent);
            opacity: 0.25;
            position: absolute;
            top: 12px;
            right: 20px;
            font-family: Georgia, serif;
            line-height: 1;
        }
        .testimonial-card .quote {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-body);
            margin-bottom: 20px;
            font-style: italic;
        }
        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card .author .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent);
            font-weight: 600;
            flex-shrink: 0;
        }
        .testimonial-card .author .info .name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-heading);
        }
        .testimonial-card .author .info .role {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            background: rgba(232, 168, 56, 0.04);
        }
        .faq-question .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
            color: var(--accent);
            font-size: 14px;
        }
        .faq-item.active .faq-question .icon {
            background: var(--accent);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 240px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 43, 60, 0.9) 0%, rgba(15, 26, 38, 0.92) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-primary {
            background: var(--accent);
            color: #fff;
            padding: 16px 44px;
            border-radius: var(--radius-sm);
            font-size: 17px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .cta-section .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 168, 56, 0.3);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            margin-top: auto;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand h4 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .site-footer .footer-col h5 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .site-footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer .footer-bottom .footer-links {
            display: flex;
            gap: 20px;
        }
        .site-footer .footer-bottom .footer-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
            transition: color var(--transition);
        }
        .site-footer .footer-bottom .footer-links a:hover {
            color: var(--accent);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
            margin: 0 auto 32px;
        }
        .divider-left {
            margin: 0 0 32px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .case-item,
            .case-item.reverse {
                flex-direction: column;
            }
            .case-image {
                flex: 0 0 auto;
                width: 100%;
                min-height: 200px;
            }
            .case-content {
                padding: 24px !important;
            }
        }

        @media (max-width: 768px) {
            .side-nav {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .hero {
                padding: 64px 0 56px;
                min-height: 320px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero .subtitle {
                font-size: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 36px;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-bottom .footer-links {
                justify-content: center;
            }
            .case-content .case-metrics {
                flex-direction: column;
                gap: 8px;
            }
            .hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero .btn-primary,
            .hero .btn-secondary {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .industry-tags {
                gap: 8px;
            }
            .industry-tag {
                padding: 8px 18px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 20px 12px;
            }
            .stat-number {
                font-size: 30px;
            }
            .hero h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 22px;
            }
            .case-content h3 {
                font-size: 18px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-8 {
            gap: 8px;
        }

        /* ===== 空状态 / 加载 / 成功 / 错误（预留） ===== */
        .state-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
        }
        .state-empty i {
            font-size: 48px;
            opacity: 0.3;
            margin-bottom: 16px;
            display: block;
        }
        .state-empty p {
            font-size: 16px;
        }
        .state-loading {
            display: flex;
            justify-content: center;
            padding: 40px;
        }
        .state-loading .spinner {
            width: 40px;
            height: 40px;
            border: 4px solid var(--border);
            border-top-color: var(--accent);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }
        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }
        .state-error {
            background: #FEF2F2;
            color: #B91C1C;
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            border-left: 4px solid #DC2626;
            font-size: 14px;
        }
        .state-success {
            background: #F0FDF4;
            color: #15803D;
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            border-left: 4px solid #22C55E;
            font-size: 14px;
        }