/* roulang page: index */
:root {
            --brand-600: #4c6ef5;
            --brand-700: #4263eb;
            --brand-800: #3b5bdb;
            --accent-500: #ff922b;
            --accent-600: #fd7e14;
            --warm-800: #292524;
            --warm-600: #57534e;
            --warm-400: #a8a29e;
            --warm-200: #e7e5e4;
            --warm-100: #f5f5f4;
            --warm-50: #fafaf9;
            --white: #ffffff;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --radius-2xl: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
            --shadow-lg: 0 8px 28px rgba(0,0,0,0.08);
            --shadow-xl: 0 12px 40px rgba(0,0,0,0.10);
            --transition-fast: 180ms ease;
            --transition-base: 260ms ease;
            --transition-slow: 380ms cubic-bezier(0.4,0,0.2,1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: "Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
            line-height: 1.7;
            color: #292524;
            background-color: #fafaf9;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--brand-700);
        }

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

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

        input:focus,
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--brand-600);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--warm-200);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 56px;
                padding: 0 16px;
            }
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--warm-800);
            letter-spacing: -0.01em;
            flex-shrink: 0;
            white-space: nowrap;
        }
        .logo-link:hover {
            color: var(--brand-700);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }
        }

        .nav-item {
            position: relative;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--warm-600);
            transition: all var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--brand-700);
            background: #f0f4ff;
        }
        .nav-link.active {
            font-weight: 600;
        }
        .nav-link .nav-arrow {
            font-size: 0.65rem;
            transition: transform var(--transition-fast);
        }
        .nav-item:hover .nav-link .nav-arrow {
            transform: rotate(180deg);
        }

        /* Mega Menu Panel */
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            padding: 28px 32px;
            min-width: 520px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition-slow);
            z-index: 999;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            border: 1px solid var(--warm-200);
        }
        .nav-item:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(4px);
        }
        .mega-card {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 14px 16px;
            border-radius: var(--radius-lg);
            transition: all var(--transition-fast);
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }
        .mega-card:hover {
            background: #f8f9fb;
            transform: translateY(-1px);
        }
        .mega-card-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: #f0f4ff;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-600);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .mega-card-info h4 {
            margin: 0 0 4px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--warm-800);
        }
        .mega-card-info p {
            margin: 0;
            font-size: 0.8rem;
            color: var(--warm-400);
            line-height: 1.4;
        }

        /* Mobile nav toggle */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--warm-600);
            padding: 8px;
            border-radius: 8px;
            cursor: pointer;
        }
        @media (max-width: 1024px) {
            .mobile-toggle {
                display: flex;
                align-items: center;
            }
        }

        /* Mobile menu drawer */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: #fff;
            z-index: 1100;
            box-shadow: -4px 0 28px rgba(0,0,0,0.12);
            padding: 24px 20px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            transform: translateX(100%);
            transition: transform var(--transition-slow);
        }
        .mobile-menu.open {
            transform: translateX(0);
        }
        @media (max-width: 1024px) {
            .mobile-menu {
                display: flex;
            }
        }
        .mobile-menu-close {
            align-self: flex-end;
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--warm-600);
            padding: 8px;
            cursor: pointer;
            border-radius: 8px;
        }
        .mobile-nav-link {
            display: block;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--warm-700);
            transition: all var(--transition-fast);
        }
        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            background: #f0f4ff;
            color: var(--brand-700);
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 1050;
            background: rgba(0,0,0,0.35);
        }
        .mobile-overlay.show {
            display: block;
        }

        /* ===== Hero Section ===== */
        .hero-section {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: linear-gradient(160deg, #f8f9fc 0%, #eef1f8 40%, #f0f4ff 100%);
            overflow: hidden;
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: 460px;
                text-align: center;
            }
        }
        .hero-bg-img {
            position: absolute;
            right: -40px;
            top: 50%;
            transform: translateY(-50%);
            width: 520px;
            max-width: 45%;
            opacity: 0.55;
            pointer-events: none;
            border-radius: 24px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.08);
        }
        @media (max-width: 768px) {
            .hero-bg-img {
                display: none;
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 600px;
            padding: 60px 0;
        }
        @media (max-width: 768px) {
            .hero-content {
                max-width: 100%;
                padding: 40px 0;
            }
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--warm-200);
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--brand-700);
            margin-bottom: 20px;
            box-shadow: var(--shadow-sm);
        }
        .hero-badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #22c55e;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,100%{opacity:1;}
            50%{opacity:0.4;}
        }
        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--warm-800);
            margin: 0 0 18px;
            letter-spacing: -0.02em;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
        }
        .hero-title span {
            color: var(--brand-600);
            position: relative;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--warm-600);
            line-height: 1.75;
            margin: 0 0 30px;
            max-width: 480px;
        }
        @media (max-width: 768px) {
            .hero-desc {
                max-width: 100%;
                font-size: 1rem;
            }
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        @media (max-width: 768px) {
            .hero-actions {
                justify-content: center;
            }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--brand-600);
            color: #fff;
            box-shadow: 0 4px 16px rgba(76,110,245,0.3);
        }
        .btn-primary:hover {
            background: var(--brand-700);
            box-shadow: 0 6px 22px rgba(76,110,245,0.4);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: #fff;
            color: var(--brand-700);
            border: 2px solid var(--brand-200);
        }
        .btn-outline:hover {
            border-color: var(--brand-600);
            background: #f8f9fc;
            transform: translateY(-2px);
        }

        /* ===== Section Commons ===== */
        .section {
            padding: 72px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand-600);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--warm-800);
            margin: 0 0 12px;
            letter-spacing: -0.01em;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.5rem;
            }
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--warm-500);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.65;
        }

        /* ===== Feature Cards ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 32px 28px;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-base);
            border: 1px solid transparent;
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--warm-200);
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--brand-600), var(--brand-400));
            border-radius: 0 0 2px 2px;
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: #f0f4ff;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-600);
            font-size: 1.3rem;
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--warm-800);
            margin: 0 0 10px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--warm-500);
            margin: 0;
            line-height: 1.6;
        }
        .feature-card-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            margin-bottom: 18px;
        }

        /* ===== Service Highlight ===== */
        .highlight-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        @media (max-width: 1024px) {
            .highlight-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        .highlight-img-wrap {
            position: relative;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .highlight-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-2xl);
        }
        .highlight-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--warm-800);
            margin: 0 0 16px;
        }
        .highlight-text p {
            font-size: 0.95rem;
            color: var(--warm-500);
            line-height: 1.7;
            margin: 0 0 20px;
        }
        .highlight-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag {
            display: inline-block;
            padding: 6px 14px;
            background: #f0f4ff;
            color: var(--brand-700);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        /* ===== CMS List Section ===== */
        .cms-list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        @media (max-width: 768px) {
            .cms-list-grid {
                grid-template-columns: 1fr;
            }
        }
        .cms-card {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 24px;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-base);
            display: flex;
            gap: 16px;
            align-items: flex-start;
            border: 1px solid transparent;
            cursor: pointer;
        }
        .cms-card:hover {
            border-color: var(--warm-200);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .cms-card-thumb {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-lg);
            background: #f8f9fb;
            flex-shrink: 0;
            object-fit: cover;
        }
        .cms-card-body {
            flex: 1;
            min-width: 0;
        }
        .cms-card-body h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--warm-800);
            margin: 0 0 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-card-body p {
            font-size: 0.83rem;
            color: var(--warm-400);
            margin: 0 0 8px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-card-meta {
            font-size: 0.78rem;
            color: var(--warm-400);
            display: flex;
            gap: 12px;
            align-items: center;
        }
        .cms-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--warm-400);
            font-size: 0.95rem;
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
        }

        /* ===== Stats ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        .stat-item {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 28px 20px;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-base);
        }
        .stat-item:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-600);
            letter-spacing: -0.02em;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--warm-500);
            margin-top: 4px;
        }

        /* ===== Steps ===== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        @media (max-width: 768px) {
            .steps-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .step-card {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 28px 24px;
            box-shadow: var(--shadow-md);
            position: relative;
            border: 1px solid transparent;
            transition: all var(--transition-base);
        }
        .step-card:hover {
            border-color: var(--warm-200);
            box-shadow: var(--shadow-lg);
        }
        .step-card::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            top: -16px;
            left: 24px;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--brand-600);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--warm-800);
            margin: 8px 0 8px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--warm-500);
            margin: 0;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--warm-200);
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            padding: 18px 22px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--warm-800);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .faq-question i {
            font-size: 0.8rem;
            color: var(--warm-400);
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--brand-600);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.88rem;
            color: var(--warm-500);
            line-height: 1.65;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(150deg, #3b5bdb 0%, #4c6ef5 40%, #748ffc 100%);
            border-radius: var(--radius-2xl);
            padding: 56px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 40px 24px;
                border-radius: var(--radius-xl);
            }
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 0 0 14px;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            font-size: 1rem;
            opacity: 0.9;
            margin: 0 0 28px;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            background: #fff;
            color: var(--brand-700);
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 6px 24px rgba(0,0,0,0.15);
            position: relative;
            z-index: 1;
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(0,0,0,0.2);
            color: var(--brand-800);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1c1917;
            color: #a8a29e;
            padding: 48px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-desc {
            font-size: 0.85rem;
            line-height: 1.6;
            color: #78716c;
        }
        .footer-col h5 {
            font-size: 0.85rem;
            font-weight: 600;
            color: #e7e5e4;
            margin: 0 0 14px;
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: #a8a29e;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid #292524;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: #78716c;
        }

/* roulang page: article */
:root {
            --color-brand: #2563eb;
            --color-brand-dark: #1d4ed8;
            --color-brand-light: #dbeafe;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.06);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }

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

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

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

        /* ========== HEADER & NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-brand);
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }
        .logo-link:hover {
            opacity: 0.85;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-brand), var(--color-brand-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text);
            transition: all var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
        }
        .nav-link:hover {
            background: var(--color-brand-light);
            color: var(--color-brand);
        }
        .nav-link.active {
            background: var(--color-brand);
            color: #fff;
            font-weight: 600;
        }
        .nav-link.active .nav-arrow {
            color: #fff;
        }
        .nav-arrow {
            font-size: 0.65rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-fast);
        }
        .nav-item:hover .nav-arrow {
            transform: rotate(180deg);
        }

        /* Mega Panel */
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--color-border);
            padding: 16px;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 10px;
            min-width: 480px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition);
            z-index: 999;
        }
        .nav-item:hover .mega-panel,
        .mega-panel:hover {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(4px);
        }

        .mega-card {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius);
            transition: all var(--transition-fast);
            text-decoration: none;
            color: var(--color-text);
        }
        .mega-card:hover {
            background: var(--color-brand-light);
            transform: translateY(-1px);
        }
        .mega-card-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-brand);
            font-size: 1rem;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }
        .mega-card:hover .mega-card-icon {
            background: var(--color-brand);
            color: #fff;
        }
        .mega-card-info h4 {
            margin: 0 0 4px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text);
        }
        .mega-card-info p {
            margin: 0;
            font-size: 0.8rem;
            color: var(--color-text-weak);
            line-height: 1.4;
        }

        /* Mobile Menu Toggle */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-text);
            padding: 8px;
            border-radius: 8px;
            transition: all var(--transition-fast);
        }
        .mobile-toggle:hover {
            background: var(--color-border-light);
            color: var(--color-brand);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 998;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            padding: 14px 18px;
            font-size: 1.05rem;
            border-radius: var(--radius);
            width: 100%;
        }
        .mobile-menu .mega-panel {
            position: static;
            transform: none;
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            box-shadow: none;
            border: none;
            min-width: auto;
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 0 0 0 20px;
            margin-top: 4px;
        }
        .mobile-menu .mega-card {
            padding: 10px 14px;
        }

        /* ========== ARTICLE HERO ========== */
        .article-hero {
            background: linear-gradient(170deg, #f0f5ff 0%, #f8fafc 40%, #ffffff 100%);
            padding: 48px 24px 40px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border-light);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero-inner {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--color-text-weak);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--color-brand);
            font-weight: 500;
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-brand-dark);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .breadcrumb .separator {
            color: var(--color-text-muted);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* Article Meta */
        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 16px;
            font-size: 0.9rem;
            color: var(--color-text-weak);
        }
        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta-item i {
            color: var(--color-brand);
            font-size: 0.85rem;
        }
        .article-category-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            background: var(--color-brand-light);
            color: var(--color-brand);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            transition: all var(--transition-fast);
        }
        .article-category-tag:hover {
            background: var(--color-brand);
            color: #fff;
        }

        /* ========== ARTICLE CONTENT ========== */
        .article-content-wrapper {
            max-width: 780px;
            margin: 0 auto;
            padding: 40px 24px 60px;
        }
        .article-content-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow);
            border: 1px solid var(--color-border-light);
        }
        @media (max-width: 640px) {
            .article-content-card {
                padding: 24px 18px;
                border-radius: var(--radius);
            }
        }

        /* Article Body Typography */
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: #334155;
            word-break: break-word;
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text);
            margin: 2em 0 0.8em;
            padding-bottom: 0.5em;
            border-bottom: 2px solid var(--color-border-light);
            letter-spacing: -0.01em;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--color-text);
            margin: 1.6em 0 0.7em;
        }
        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-text);
            margin: 1.4em 0 0.6em;
        }
        .article-body p {
            margin: 0 0 1.2em;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 1.2em;
            padding-left: 1.5em;
        }
        .article-body li {
            margin-bottom: 0.5em;
            padding-left: 0.25em;
        }
        .article-body ul li::marker {
            color: var(--color-brand);
        }
        .article-body ol li::marker {
            color: var(--color-brand);
            font-weight: 600;
        }
        .article-body blockquote {
            margin: 1.5em 0;
            padding: 20px 24px;
            background: #f8fafc;
            border-left: 4px solid var(--color-brand);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: #475569;
            font-style: italic;
        }
        .article-body blockquote p {
            margin: 0;
        }
        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            margin: 1.5em 0;
            box-shadow: var(--shadow-md);
        }
        .article-body figure {
            margin: 1.5em 0;
        }
        .article-body figcaption {
            text-align: center;
            font-size: 0.85rem;
            color: var(--color-text-weak);
            margin-top: 8px;
        }
        .article-body a {
            color: var(--color-brand);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition-fast);
        }
        .article-body a:hover {
            color: var(--color-brand-dark);
        }
        .article-body code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: #e11d48;
            font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
        }
        .article-body pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 1.5em 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-body pre code {
            background: none;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 0.95rem;
        }
        .article-body th,
        .article-body td {
            padding: 10px 14px;
            border: 1px solid var(--color-border);
            text-align: left;
        }
        .article-body th {
            background: #f8fafc;
            font-weight: 600;
            color: var(--color-text);
        }
        .article-body hr {
            border: none;
            border-top: 1px solid var(--color-border);
            margin: 2em 0;
        }

        /* ========== RELATED POSTS ========== */
        .related-section {
            max-width: 1100px;
            margin: 0 auto 60px;
            padding: 0 24px;
        }
        .related-section-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section-title i {
            color: var(--color-accent);
            font-size: 1.2rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        @media (max-width: 900px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-brand-light);
        }
        .related-card-img {
            height: 160px;
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }
        .related-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.05), transparent);
        }
        .related-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 8px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-title a {
            color: inherit;
            transition: color var(--transition-fast);
        }
        .related-card-title a:hover {
            color: var(--color-brand);
        }
        .related-card-desc {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            line-height: 1.5;
            margin: 0 0 12px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-date {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }

        /* ========== NOT FOUND ========== */
        .not-found-section {
            max-width: 600px;
            margin: 80px auto;
            text-align: center;
            padding: 60px 24px;
        }
        .not-found-icon {
            font-size: 4rem;
            color: var(--color-text-muted);
            margin-bottom: 20px;
        }
        .not-found-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .not-found-desc {
            color: var(--color-text-weak);
            margin-bottom: 28px;
            font-size: 1.05rem;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 50%, #2563eb 100%);
            padding: 56px 24px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -150px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-inner {
            max-width: 650px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        .cta-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-desc {
            font-size: 1.05rem;
            opacity: 0.9;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: #fff;
            color: var(--color-brand);
            font-weight: 600;
            font-size: 1rem;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
            text-decoration: none;
        }
        .btn-cta:hover {
            background: #f0f5ff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--color-brand);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
            text-decoration: none;
        }
        .btn-primary:hover {
            background: var(--color-brand-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: transparent;
            color: var(--color-brand);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 50px;
            border: 2px solid var(--color-brand);
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-outline:hover {
            background: var(--color-brand-light);
            border-color: var(--color-brand-dark);
            color: var(--color-brand-dark);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 24px 28px;
            font-size: 0.9rem;
        }
        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-desc {
            line-height: 1.6;
            color: #94a3b8;
            margin: 0;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin: 0 0 12px;
        }
        .footer-col a {
            display: block;
            color: #94a3b8;
            padding: 4px 0;
            transition: color var(--transition-fast);
            font-size: 0.875rem;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            max-width: 1200px;
            margin: 28px auto 0;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.8rem;
            color: #64748b;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .mega-panel {
                min-width: 360px;
            }
            .article-content-card {
                padding: 32px 24px;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .site-header {
                position: sticky;
            }
            .article-hero {
                padding: 32px 16px 28px;
            }
            .article-hero h1 {
                font-size: 1.5rem;
                line-height: 1.4;
            }
            .article-content-wrapper {
                padding: 24px 16px 40px;
            }
            .article-content-card {
                padding: 24px 16px;
                border-radius: var(--radius);
            }
            .article-body {
                font-size: 1rem;
                line-height: 1.8;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .related-section {
                padding: 0 16px;
                margin-bottom: 40px;
            }
            .cta-section {
                padding: 40px 16px;
            }
            .cta-title {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                padding: 0 16px;
                height: 56px;
            }
            .logo-link {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .article-meta {
                gap: 10px;
                font-size: 0.8rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            .article-hero h1 {
                font-size: 1.35rem;
            }
            .btn-cta,
            .btn-primary,
            .btn-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category1 */
:root {
            --color-brand-600: #2563eb;
            --color-brand-700: #1d4ed8;
            --color-brand-800: #1e40af;
            --color-surface-50: #f8fafc;
            --color-surface-100: #f1f5f9;
            --color-surface-700: #334155;
            --color-surface-800: #1e293b;
            --color-surface-900: #0f172a;
            --color-accent-500: #eab308;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --shadow-card: 0 1px 3px 0 rgba(0,0,0,0.06), 0 4px 12px 0 rgba(0,0,0,0.04);
            --shadow-card-hover: 0 4px 16px 0 rgba(0,0,0,0.10), 0 8px 28px 0 rgba(0,0,0,0.06);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            line-height: 1.7;
            color: #1e293b;
            background-color: #ffffff;
            min-height: 100vh;
        }

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

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

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

        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ========== Header & Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid #e2e8f0;
            box-shadow: 0 2px 12px 0 rgba(0,0,0,0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: #1e293b;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 0.25rem;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.5rem 0.9rem;
            border-radius: 0.5rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: #475569;
            transition: var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
        }

        .nav-link:hover {
            color: #2563eb;
            background: #eff6ff;
        }

        .nav-link.active {
            color: #2563eb;
            background: #dbeafe;
            font-weight: 600;
        }

        .nav-arrow {
            font-size: 0.65rem;
            transition: transform 0.25s ease;
        }

        .nav-item:hover .nav-arrow {
            transform: rotate(180deg);
        }

        /* Mega Panel */
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: #fff;
            border-radius: 1rem;
            box-shadow: 0 8px 32px 0 rgba(0,0,0,0.10), 0 2px 8px 0 rgba(0,0,0,0.05);
            border: 1px solid #e2e8f0;
            padding: 1rem;
            display: grid;
            grid-template-columns: repeat(2, 240px);
            gap: 0.5rem;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.25s ease;
            z-index: 200;
        }

        .nav-item:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(4px);
        }

        .mega-card {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            padding: 0.85rem 1rem;
            border-radius: 0.75rem;
            transition: var(--transition-base);
            text-decoration: none;
            color: inherit;
            cursor: pointer;
        }

        .mega-card:hover {
            background: #f1f5f9;
        }

        .mega-card-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: #eff6ff;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #2563eb;
            font-size: 1.1rem;
            flex-shrink: 0;
            transition: var(--transition-base);
        }

        .mega-card:hover .mega-card-icon {
            background: #dbeafe;
            color: #1d4ed8;
        }

        .mega-card-info h4 {
            margin: 0 0 0.15rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: #1e293b;
        }

        .mega-card-info p {
            margin: 0;
            font-size: 0.78rem;
            color: #64748b;
            line-height: 1.4;
        }

        /* Mobile Menu Toggle */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: #475569;
            padding: 0.4rem;
            border-radius: 0.5rem;
            transition: var(--transition-base);
        }

        .mobile-toggle:hover {
            background: #f1f5f9;
            color: #2563eb;
        }

        /* Mobile Nav */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(15,23,42,0.5);
            z-index: 90;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .mobile-nav-overlay.open {
            display: block;
            opacity: 1;
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 64px;
            right: 0;
            width: 300px;
            max-width: 85vw;
            bottom: 0;
            background: #fff;
            z-index: 95;
            padding: 1.5rem;
            overflow-y: auto;
            box-shadow: -4px 0 24px rgba(0,0,0,0.12);
            transform: translateX(100%);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .mobile-nav-panel.open {
            transform: translateX(0);
        }

        .mobile-nav-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
        }

        .mobile-nav-list .nav-link {
            display: block;
            padding: 0.75rem 1rem;
            border-radius: 0.6rem;
            font-size: 1rem;
            font-weight: 500;
        }

        .mobile-sub-items {
            list-style: none;
            margin: 0.25rem 0 0.5rem 1.25rem;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
        }

        .mobile-sub-items a {
            display: block;
            padding: 0.5rem 0.75rem;
            border-radius: 0.5rem;
            font-size: 0.9rem;
            color: #64748b;
        }

        .mobile-sub-items a:hover {
            background: #f1f5f9;
            color: #2563eb;
        }

        /* ========== Page Hero ========== */
        .page-hero {
            position: relative;
            background: linear-gradient(160deg, #1e3a8a 0%, #1d4ed8 40%, #2563eb 70%, #3b82f6 100%);
            padding: 4rem 0 5rem;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, rgba(255,255,255,0.08), transparent);
            pointer-events: none;
        }

        .page-hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .page-hero-badge {
            display: inline-block;
            background: rgba(255,255,255,0.18);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            margin-bottom: 1.25rem;
            letter-spacing: 0.02em;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.25);
        }

        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #ffffff;
            margin: 0 0 1rem;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }

        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.88);
            margin: 0 auto 2rem;
            line-height: 1.75;
            max-width: 560px;
        }

        .page-hero-buttons {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.7rem 1.6rem;
            border-radius: 0.6rem;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: #ffffff;
            color: #1d4ed8;
            box-shadow: 0 2px 8px rgba(0,0,0,0.10);
        }

        .btn-primary:hover {
            background: #f1f5f9;
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255,255,255,0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255,255,255,0.12);
            border-color: #ffffff;
        }

        /* ========== Section Common ========== */
        .section {
            padding: 4rem 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            color: #2563eb;
            background: #eff6ff;
            padding: 0.3rem 0.9rem;
            border-radius: 999px;
            letter-spacing: 0.03em;
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: #1e293b;
            margin: 0 0 0.6rem;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 1rem;
            color: #64748b;
            margin: 0 auto;
            max-width: 560px;
            line-height: 1.7;
        }

        /* ========== Product Grid ========== */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .product-card {
            background: #fff;
            border-radius: 1rem;
            border: 1px solid #e2e8f0;
            overflow: hidden;
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .product-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #cbd5e1;
        }

        .product-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: #f1f5f9;
        }

        .product-card-body {
            padding: 1.25rem 1.25rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .product-card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
            margin-bottom: 0.6rem;
            letter-spacing: 0.02em;
            width: fit-content;
        }

        .tag-hot {
            background: #fef2f2;
            color: #dc2626;
        }

        .tag-new {
            background: #f0fdf4;
            color: #16a34a;
        }

        .tag-popular {
            background: #eff6ff;
            color: #2563eb;
        }

        .product-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #1e293b;
            margin: 0 0 0.5rem;
            line-height: 1.4;
        }

        .product-card p {
            font-size: 0.88rem;
            color: #64748b;
            margin: 0 0 1.25rem;
            line-height: 1.6;
            flex: 1;
        }

        .product-card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-weight: 600;
            font-size: 0.9rem;
            color: #2563eb;
            transition: var(--transition-base);
        }

        .product-card-link:hover {
            color: #1d4ed8;
            gap: 0.55rem;
        }

        .product-card-link i {
            font-size: 0.75rem;
        }

        /* ========== Featured Section ========== */
        .featured-section {
            background: #f8fafc;
            padding: 4rem 0;
        }

        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        .featured-card {
            background: #fff;
            border-radius: 1rem;
            border: 1px solid #e2e8f0;
            padding: 1.75rem;
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
        }

        .featured-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .featured-card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #2563eb;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .featured-card-info h4 {
            margin: 0 0 0.35rem;
            font-size: 1.05rem;
            font-weight: 700;
            color: #1e293b;
        }

        .featured-card-info p {
            margin: 0;
            font-size: 0.88rem;
            color: #64748b;
            line-height: 1.6;
        }

        /* ========== Highlights ========== */
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
        }

        .highlight-item {
            text-align: center;
            padding: 1.5rem 1rem;
            border-radius: 1rem;
            background: #fff;
            border: 1px solid #e2e8f0;
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
        }

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

        .highlight-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 0.75rem;
            background: #eff6ff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #2563eb;
            font-size: 1.2rem;
        }

        .highlight-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #1e293b;
            margin: 0 0 0.35rem;
        }

        .highlight-item p {
            font-size: 0.8rem;
            color: #64748b;
            margin: 0;
            line-height: 1.5;
        }

        /* ========== Scenario Cards ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }

        .scenario-card {
            background: #fff;
            border-radius: 1rem;
            border: 1px solid #e2e8f0;
            padding: 1.5rem 1.25rem;
            text-align: center;
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #bfdbfe;
        }

        .scenario-card .scenario-icon {
            font-size: 2rem;
            margin-bottom: 0.75rem;
            color: #2563eb;
        }

        .scenario-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #1e293b;
            margin: 0 0 0.4rem;
        }

        .scenario-card p {
            font-size: 0.82rem;
            color: #64748b;
            margin: 0;
            line-height: 1.5;
        }

        /* ========== Steps / Process ========== */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
            position: relative;
        }

        .step-card {
            background: #fff;
            border-radius: 1rem;
            border: 1px solid #e2e8f0;
            padding: 1.75rem 1.25rem;
            text-align: center;
            position: relative;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .step-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .step-number {
            display: inline-flex;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #2563eb;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            margin-bottom: 0.75rem;
        }

        .step-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #1e293b;
            margin: 0 0 0.4rem;
        }

        .step-card p {
            font-size: 0.82rem;
            color: #64748b;
            margin: 0;
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .faq-item {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 0.85rem;
            overflow: hidden;
            transition: var(--transition-base);
            box-shadow: 0 1px 2px rgba(0,0,0,0.03);
        }

        .faq-item:hover {
            border-color: #cbd5e1;
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 1.1rem 1.25rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: #1e293b;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            transition: var(--transition-base);
        }

        .faq-question:hover {
            color: #2563eb;
            background: #f8fafc;
        }

        .faq-question i {
            font-size: 0.8rem;
            color: #94a3b8;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer-inner {
            padding: 0 1.25rem 1.1rem;
            font-size: 0.88rem;
            color: #64748b;
            line-height: 1.7;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: #2563eb;
        }

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

        .faq-item.open {
            border-color: #bfdbfe;
            box-shadow: 0 2px 8px rgba(37,99,235,0.06);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(160deg, #1e3a8a 0%, #1d4ed8 100%);
            padding: 4rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 600px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 0.75rem;
        }

        .cta-content p {
            font-size: 1rem;
            color: rgba(255,255,255,0.85);
            margin: 0 auto 1.75rem;
            line-height: 1.7;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: #94a3b8;
            line-height: 1.7;
            margin: 0;
        }

        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #e2e8f0;
            margin: 0 0 0.75rem;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: #94a3b8;
            padding: 0.25rem 0;
            transition: var(--transition-base);
        }

        .footer-col a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 1.25rem;
            text-align: center;
            font-size: 0.8rem;
            color: #64748b;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .highlights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-nav-overlay,
            .mobile-nav-panel {
                display: block;
            }
            .header-inner {
                height: 56px;
            }
            .product-grid {
                grid-template-columns: 1fr 1fr;
            }
            .highlights-grid {
                grid-template-columns: 1fr 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps-container {
                grid-template-columns: 1fr 1fr;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .page-hero {
                padding: 2.5rem 0 3.5rem;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .section {
                padding: 2.5rem 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .product-grid {
                grid-template-columns: 1fr;
            }
            .highlights-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .steps-container {
                grid-template-columns: 1fr;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .page-hero p {
                font-size: 0.9rem;
            }
            .page-hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.25rem;
            }
            .container-custom {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .featured-card {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
        }

/* roulang page: category3 */
/* === 设计变量 === */
        :root {
            --primary: #1e3a8a;
            --primary-light: #3b82f6;
            --primary-soft: #eff6ff;
            --accent: #f97316;
            --accent-soft: #fff7ed;
            --bg: #f8fafc;
            --card-bg: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
            --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 4px 10px -4px rgba(0,0,0,0.04);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --transition: all 0.2s ease;
            --max-width: 1200px;
        }
        
        /* === Reset & Base === */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul { list-style: none; }
        
        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        
        /* === 导航 === */
        .site-header {
            background: var(--white);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo i { color: var(--accent); font-size: 1.3rem; }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-item { position: relative; }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-link:hover { color: var(--primary); }
        .nav-link.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
        .nav-arrow { font-size: 0.7rem; margin-left: 2px; }
        
        /* Mega Menu */
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 0;
            background: var(--white);
            box-shadow: var(--shadow-lg);
            border-radius: var(--radius-md);
            min-width: 280px;
            padding: 1rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
            z-index: 50;
        }
        .nav-item:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .mega-card {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.75rem;
            border-radius: var(--radius-sm);
            transition: background 0.15s;
        }
        .mega-card:hover { background: var(--primary-soft); }
        .mega-card-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-soft);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .mega-card-info h4 { font-size: 0.9rem; color: var(--text); margin-bottom: 0.15rem; }
        .mega-card-info p { font-size: 0.8rem; color: var(--text-light); line-height: 1.3; }
        
        /* 移动端导航切换 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--text);
            cursor: pointer;
        }
        @media (max-width: 1024px) {
            .menu-toggle { display: block; }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 1.5rem;
                box-shadow: var(--shadow-md);
                gap: 1rem;
                transform: translateY(-10%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.25s ease;
                z-index: 99;
            }
            .main-nav.show {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }
            .nav-item { width: 100%; }
            .mega-panel {
                position: static;
                box-shadow: none;
                opacity: 1;
                visibility: visible;
                transform: none;
                padding: 0.5rem 0 0 1rem;
                background: transparent;
                display: none;
            }
            .nav-item:hover .mega-panel { display: flex; }
        }
        
        /* === Hero === */
        .hero {
            background: linear-gradient(135deg, var(--primary-soft) 0%, #ede9fe 100%);
            padding: 4rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            right: 0;
            top: 0;
            width: 50%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 700px;
        }
        .hero h1 {
            font-size: clamp(2rem, 5vw, 2.8rem);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 1.2rem;
        }
        .hero p {
            font-size: 1.1rem;
            color: var(--text-light);
            margin-bottom: 2rem;
            max-width: 600px;
        }
        
        /* === 板块通用 === */
        .section {
            padding: 4rem 0;
        }
        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
        }
        .section-subtitle {
            color: var(--text-light);
            margin-bottom: 2.5rem;
            font-size: 1rem;
        }
        
        /* === 卡片网格 === */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-soft);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
        }
        .card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
        .card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.6; }
        
        /* === 流程 / 步骤 === */
        .steps-flow {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2rem;
            margin-top: 2rem;
        }
        .step-item {
            flex: 1 1 200px;
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            position: relative;
        }
        .step-number {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        .step-item h4 { margin-bottom: 0.4rem; }
        .step-item p { color: var(--text-light); font-size: 0.9rem; }
        
        /* === FAQ === */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--white);
            border-radius: var(--radius-sm);
            padding: 1.2rem 1.5rem;
            margin-bottom: 0.8rem;
            box-shadow: var(--shadow-sm);
            cursor: pointer;
            transition: var(--transition);
            border-left: 4px solid transparent;
        }
        .faq-item:hover { border-left-color: var(--primary-light); background: #f8fafc; }
        .faq-question {
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            color: var(--text-light);
            margin-top: 0;
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            margin-top: 0.8rem;
        }
        
        /* === CTA === */
        .cta-block {
            background: linear-gradient(135deg, var(--primary), #1e40af);
            border-radius: var(--radius-lg);
            padding: 3rem 2rem;
            text-align: center;
            color: white;
            margin: 3rem auto;
            max-width: 900px;
            box-shadow: var(--shadow-lg);
        }
        .cta-block h2 { font-size: 1.8rem; margin-bottom: 1rem; }
        .cta-block p { color: rgba(255,255,255,0.85); margin-bottom: 1.8rem; }
        
        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary { background: var(--accent); color: white; }
        .btn-primary:hover { background: #ea580c; transform: translateY(-1px); box-shadow: 0 4px 10px rgba(249,115,22,0.4); }
        .btn-outline { background: transparent; border: 2px solid white; color: white; }
        .btn-outline:hover { background: rgba(255,255,255,0.15); }
        
        /* === Footer === */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand { font-size: 1.3rem; font-weight: 700; color: white; margin-bottom: 0.5rem; }
        .footer-desc { font-size: 0.9rem; line-height: 1.5; margin-bottom: 1rem; }
        .footer-col h5 { color: white; margin-bottom: 0.8rem; font-weight: 600; font-size: 0.95rem; }
        .footer-col a {
            display: block;
            color: #94a3b8;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
            transition: color 0.15s;
        }
        .footer-col a:hover { color: white; }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-col { margin-top: 1rem; }
        }
        
        @media (max-width: 640px) {
            .hero { padding: 3rem 0; }
            .section { padding: 3rem 0; }
            .card-grid { grid-template-columns: 1fr; }
        }

/* roulang page: category2 */
:root {
            --primary: #1a56db;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --accent: #0d9488;
            --accent-light: #ccfbf1;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
            --shadow-lg: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 40px rgba(0,0,0,0.1), 0 8px 16px rgba(0,0,0,0.06);
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --max-width: 1200px;
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }

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

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

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

        .container-custom {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            transition: opacity var(--transition);
            flex-shrink: 0;
        }

        .logo-link:hover {
            opacity: 0.85;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 4px;
            margin: 0;
            padding: 0;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            white-space: nowrap;
            cursor: pointer;
        }

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

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

        .nav-arrow {
            font-size: 0.65rem;
            transition: transform var(--transition);
        }

        .nav-item:hover .nav-arrow {
            transform: rotate(180deg);
        }

        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            padding: 16px;
            display: flex;
            gap: 12px;
            min-width: 420px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition-slow);
            z-index: 999;
        }

        .nav-item:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(4px);
        }

        .mega-card {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius);
            flex: 1;
            transition: all var(--transition);
            cursor: pointer;
            min-width: 0;
        }

        .mega-card:hover {
            background: var(--primary-light);
        }

        .mega-card-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .mega-card-info h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 3px 0;
            line-height: 1.3;
        }

        .mega-card-info p {
            font-size: 0.78rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.4;
        }

        /* Mobile menu toggle */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .mobile-menu-btn:hover {
            background: var(--border-light);
            color: var(--primary);
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            padding: 80px 0 90px;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a3c34 100%);
            overflow: hidden;
        }

        .hero-bg-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.18;
            pointer-events: none;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26,86,219,0.25) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 40%, rgba(13,148,136,0.2) 0%, transparent 55%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 750px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.12);
            border: 1px solid rgba(255,255,255,0.2);
            color: #e2e8f0;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(8px);
        }

        .hero-badge i {
            color: #60a5fa;
            font-size: 0.75rem;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .hero-title span {
            background: linear-gradient(135deg, #60a5fa, #5eead4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: #cbd5e1;
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 600px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            white-space: nowrap;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26,86,219,0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(26,86,219,0.45);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background: transparent;
            color: #e2e8f0;
            border: 1.5px solid rgba(255,255,255,0.35);
        }

        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.55);
            color: #fff;
        }

        .hero-stats {
            position: relative;
            z-index: 2;
            display: flex;
            gap: 40px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.15);
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }

        .hero-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1;
        }

        .hero-stat-num span {
            font-size: 1.2rem;
            font-weight: 600;
            color: #5eead4;
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: #94a3b8;
            margin-top: 6px;
        }

        /* Section Common */
        .section {
            padding: 70px 0;
        }

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

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* Cards Grid */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

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

        .card-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 18px;
            flex-shrink: 0;
        }

        .card-icon-blue {
            background: #dbeafe;
            color: #1a56db;
        }

        .card-icon-teal {
            background: #ccfbf1;
            color: #0d9488;
        }

        .card-icon-amber {
            background: #fef3c7;
            color: #d97706;
        }

        .card-icon-purple {
            background: #ede9fe;
            color: #7c3aed;
        }

        .card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
            flex-grow: 1;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 14px;
        }

        .tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 50px;
            background: var(--border-light);
            color: var(--text-secondary);
        }

        /* Solution Cards with Image */
        .solution-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .solution-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }

        .solution-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .solution-card-body {
            padding: 22px 24px 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .solution-card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .solution-card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex-grow: 1;
            margin-bottom: 14px;
        }

        .solution-card-features {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .solution-card-features li {
            font-size: 0.85rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .solution-card-features li i {
            color: var(--accent);
            font-size: 0.7rem;
            flex-shrink: 0;
        }

        .btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            text-decoration: none;
            align-self: flex-start;
        }

        .btn-sm-primary {
            background: var(--primary);
            color: #fff;
        }

        .btn-sm-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 12px rgba(26,86,219,0.3);
        }

        /* Process Steps */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .process-step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 6px 18px rgba(26,86,219,0.3);
            position: relative;
            z-index: 2;
        }

        .process-step h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .process-connector {
            position: absolute;
            top: 28px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--border);
            z-index: 0;
        }

        /* Industry Grid */
        .industry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
        }

        .industry-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px 16px;
            text-align: center;
            transition: all var(--transition);
            cursor: default;
        }

        .industry-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
            transform: translateY(-2px);
        }

        .industry-card i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 10px;
            display: block;
        }

        .industry-card h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .industry-card span {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            gap: 12px;
            transition: all var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
            background: #fafbff;
        }

        .faq-question i {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

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

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

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

        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a3c34 100%);
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-bg-pattern {
            position: absolute;
            inset: 0;
            opacity: 0.06;
            pointer-events: none;
            background-image: radial-gradient(circle at 20% 60%, #60a5fa 1px, transparent 1px),
                              radial-gradient(circle at 75% 30%, #5eead4 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 650px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .cta-content p {
            font-size: 1.05rem;
            color: #cbd5e1;
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            text-decoration: none;
            background: #ffffff;
            color: var(--primary);
            box-shadow: 0 8px 28px rgba(0,0,0,0.25);
        }

        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(0,0,0,0.35);
            background: #f1f5f9;
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 50px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
        }

        .footer-desc {
            font-size: 0.88rem;
            color: #94a3b8;
            line-height: 1.6;
        }

        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: #94a3b8;
            padding: 5px 0;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 18px;
            text-align: center;
            font-size: 0.82rem;
            color: #64748b;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.4rem;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .process-connector {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .hero-stats {
                gap: 24px;
            }
            .mega-panel {
                min-width: 340px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 56px;
            }
            .main-nav {
                position: fixed;
                top: 56px;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--surface);
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                gap: 2px;
                overflow-y: auto;
                display: none;
                z-index: 999;
                border-top: 1px solid var(--border);
                box-shadow: var(--shadow-xl);
            }
            .main-nav.mobile-open {
                display: flex;
            }
            .nav-item {
                position: static;
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius);
            }
            .mega-panel {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                box-shadow: none;
                border: none;
                min-width: auto;
                flex-direction: column;
                padding: 4px 0 8px 20px;
                display: none;
            }
            .nav-item.mega-open .mega-panel {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .hero-section {
                padding: 50px 0 60px;
            }
            .hero-title {
                font-size: 1.9rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 18px;
                margin-top: 28px;
                padding-top: 22px;
            }
            .hero-stat-num {
                font-size: 1.5rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .industry-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .btn {
                justify-content: center;
                width: 100%;
            }
            .solution-card-img {
                height: 160px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 4px 12px;
            }
            .section-title {
                font-size: 1.45rem;
            }
            .industry-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .industry-card {
                padding: 16px 10px;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .btn-cta {
                width: 100%;
                justify-content: center;
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }