/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1B4F72;
            --primary-dark: #0D2B40;
            --primary-light: #2C7BB6;
            --secondary: #F2994A;
            --secondary-light: #F5B041;
            --secondary-dark: #E67E22;
            --bg-main: #F8FAFC;
            --bg-alt: #EDF2F7;
            --bg-card: #FFFFFF;
            --text-primary: #1E293B;
            --text-secondary: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --shadow-sm: 0 4px 20px rgba(27, 79, 114, 0.06);
            --shadow-hover: 0 12px 40px rgba(27, 79, 114, 0.10);
            --shadow-btn: 0 4px 12px rgba(242, 153, 74, 0.25);
            --shadow-btn-hover: 0 6px 20px rgba(242, 153, 74, 0.35);
            --radius-lg: 16px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-en: 'Inter', 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --nav-height: 72px;
            --gutter: 32px;
            --section-gap: 100px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-main);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 2px;
        }

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

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

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.2;
            color: var(--text-primary);
        }

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

        .row {
            display: flex;
            flex-wrap: wrap;
            margin-left: calc(var(--gutter) / -2);
            margin-right: calc(var(--gutter) / -2);
        }

        .col-6 {
            flex: 0 0 calc(50% - var(--gutter));
            max-width: calc(50% - var(--gutter));
            margin-left: calc(var(--gutter) / 2);
            margin-right: calc(var(--gutter) / 2);
        }

        .col-4 {
            flex: 0 0 calc(33.333% - var(--gutter));
            max-width: calc(33.333% - var(--gutter));
            margin-left: calc(var(--gutter) / 2);
            margin-right: calc(var(--gutter) / 2);
        }

        .col-3 {
            flex: 0 0 calc(25% - var(--gutter));
            max-width: calc(25% - var(--gutter));
            margin-left: calc(var(--gutter) / 2);
            margin-right: calc(var(--gutter) / 2);
        }

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

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

        .section-title {
            font-size: 32px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px auto;
            line-height: 1.6;
        }

        /* ===== Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: box-shadow 0.3s ease;
        }

        .header.scrolled {
            box-shadow: 0 2px 24px rgba(27, 79, 114, 0.08);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .logo svg {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
        }

        .logo span {
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-links a {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            position: relative;
            padding: 4px 0;
            transition: color 0.25s ease;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: width 0.3s ease;
        }

        .nav-links a:hover {
            color: var(--secondary);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

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

        .nav-links a.active::after {
            width: 100%;
            background: var(--secondary);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--secondary);
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            box-shadow: var(--shadow-btn);
            transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
        }

        .nav-cta:hover {
            background: var(--secondary-dark);
            color: #fff !important;
            transform: scale(1.02);
            box-shadow: var(--shadow-btn-hover);
        }

        .nav-cta::after {
            display: none !important;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            background: none;
            border: none;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

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

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

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

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--nav-height));
            background: rgba(27, 79, 114, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }

        .mobile-nav.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-nav a {
            font-size: 22px;
            font-weight: 500;
            color: #fff;
            padding: 8px 24px;
            border-radius: var(--radius-md);
            transition: background 0.25s ease;
        }

        .mobile-nav a:hover {
            background: rgba(242, 153, 74, 0.15);
        }

        .mobile-nav a.active {
            background: rgba(242, 153, 74, 0.20);
            color: var(--secondary-light);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 70vh;
            background: var(--primary);
            background-image: radial-gradient(ellipse at 80% 20%, rgba(44, 123, 182, 0.3) 0%, transparent 60%),
                linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            display: flex;
            align-items: center;
            padding-top: var(--nav-height);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .hero-pattern {
            position: absolute;
            inset: 0;
            opacity: 0.08;
            background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.15'%3E%3Ccircle cx='30' cy='30' r='1.5'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-content {
            max-width: 720px;
            padding: 60px 0;
        }

        .hero-title {
            font-size: 48px;
            font-weight: 700;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .hero-subtitle {
            font-size: 20px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.6;
            margin-bottom: 40px;
            max-width: 580px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            font-size: 17px;
            padding: 16px 40px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-btn);
            transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
            border: none;
            min-height: 48px;
        }

        .btn-primary:hover {
            background: var(--secondary-dark);
            color: #fff;
            transform: scale(1.02);
            box-shadow: var(--shadow-btn-hover);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 17px;
            padding: 16px 36px;
            border-radius: var(--radius-md);
            border: 2px solid rgba(255, 255, 255, 0.35);
            transition: background 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
            min-height: 48px;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            transform: scale(1.02);
        }

        .hero-graphic {
            position: absolute;
            right: 5%;
            bottom: 10%;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.12);
            pointer-events: none;
            opacity: 0.5;
        }

        .hero-graphic::after {
            content: '';
            position: absolute;
            inset: 20px;
            border-radius: 50%;
            border: 1.5px solid rgba(255, 255, 255, 0.08);
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gutter);
        }

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-align: center;
        }

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

        .feature-icon {
            font-size: 40px;
            margin-bottom: 20px;
            display: block;
            line-height: 1;
        }

        .feature-card h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

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

        /* ===== Demo / Showcase ===== */
        .demo-block {
            display: flex;
            align-items: center;
            gap: 60px;
            padding: 24px 0;
        }

        .demo-block.reverse {
            flex-direction: row-reverse;
        }

        .demo-text {
            flex: 1;
        }

        .demo-text h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .demo-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .demo-text .btn-primary {
            font-size: 15px;
            padding: 14px 32px;
        }

        .demo-image {
            flex: 1;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            background: var(--bg-alt);
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .demo-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        /* ===== Social Proof ===== */
        .proof-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gutter);
            margin-bottom: 56px;
        }

        .proof-stat {
            text-align: center;
            background: var(--bg-card);
            padding: 32px 16px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }

        .proof-stat .number {
            font-size: 44px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .proof-stat .label {
            font-size: 16px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .testimonials {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gutter);
        }

        .testimonial-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .testimonial-card .stars {
            color: var(--secondary);
            font-size: 18px;
            letter-spacing: 2px;
        }

        .testimonial-card .quote {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-card .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-light);
        }

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

        /* ===== Pricing ===== */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gutter);
            align-items: start;
        }

        .pricing-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            text-align: center;
            border: 2px solid transparent;
        }

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

        .pricing-card.featured {
            border-color: var(--secondary);
            box-shadow: var(--shadow-btn);
        }

        .pricing-card.featured .badge {
            position: absolute;
            top: -12px;
            right: 24px;
            background: var(--secondary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 20px;
        }

        .pricing-card .plan-name {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .pricing-card .price {
            font-size: 48px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .pricing-card .price span {
            font-size: 18px;
            font-weight: 400;
            color: var(--text-secondary);
        }

        .pricing-card .desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .pricing-card .features-list {
            text-align: left;
            margin-bottom: 32px;
        }

        .pricing-card .features-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--text-primary);
            border-bottom: 1px solid var(--bg-alt);
        }

        .pricing-card .features-list li:last-child {
            border-bottom: none;
        }

        .pricing-card .features-list li .fa-check {
            color: #22C55E;
            font-size: 14px;
            width: 18px;
        }

        .pricing-card .features-list li .fa-times {
            color: var(--text-light);
            font-size: 14px;
            width: 18px;
        }

        .pricing-card .btn-primary {
            width: 100%;
            justify-content: center;
            padding: 14px 24px;
            font-size: 16px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 0;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 0;
            cursor: pointer;
            user-select: none;
            transition: color 0.2s ease;
        }

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

        .faq-question .q-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-question h4 {
            flex: 1;
            font-size: 18px;
            font-weight: 600;
            color: inherit;
        }

        .faq-toggle {
            font-size: 22px;
            color: var(--text-light);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            line-height: 1;
        }

        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            color: var(--secondary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 0 0 48px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 0 20px 48px;
        }

        .faq-answer p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== Latest News ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--gutter);
        }

        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-card .tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-alt);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
        }

        .news-card .date {
            font-size: 13px;
            color: var(--text-light);
        }

        .news-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .news-card .summary {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .read-more {
            font-size: 15px;
            font-weight: 500;
            color: var(--secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 4px;
            transition: gap 0.25s ease;
        }

        .news-card .read-more:hover {
            gap: 12px;
            color: var(--secondary-dark);
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
        }

        .news-empty .empty-icon {
            font-size: 56px;
            margin-bottom: 16px;
            opacity: 0.5;
        }

        .news-empty p {
            font-size: 18px;
            color: var(--text-secondary);
        }

        /* ===== CTA Banner ===== */
        .cta-banner {
            background: var(--primary);
            background-image: radial-gradient(ellipse at 30% 50%, rgba(44, 123, 182, 0.25) 0%, transparent 70%);
            padding: 80px 0;
            text-align: center;
        }

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

        .cta-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px auto;
            line-height: 1.6;
        }

        .cta-banner .btn-primary {
            font-size: 18px;
            padding: 18px 48px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: #fff;
            padding: 64px 0 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

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

        .footer-brand .logo svg path {
            fill: #fff;
        }

        .footer-brand p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer h4 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.25s ease;
        }

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

        .footer-contact p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .footer-contact p i {
            width: 20px;
            color: var(--secondary);
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            color: rgba(255, 255, 255, 0.8);
            font-size: 18px;
            transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Floating CTA ===== */
        .float-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 999;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--secondary);
            color: #fff;
            font-size: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-btn);
            transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .float-cta:hover {
            transform: scale(1.08);
            box-shadow: var(--shadow-btn-hover);
            background: var(--secondary-dark);
            color: #fff;
        }

        /* ===== Modal ===== */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 2000;
            display: none;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .modal-overlay.open {
            display: flex;
        }

        .modal-box {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            max-width: 440px;
            width: 90%;
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.2);
            position: relative;
            animation: modalIn 0.3s ease;
        }

        @keyframes modalIn {
            from {
                opacity: 0;
                transform: scale(0.92) translateY(20px);
            }
            to {
                opacity: 1;
                transform: scale(1) translateY(0);
            }
        }

        .modal-close {
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 24px;
            color: var(--text-light);
            background: none;
            border: none;
            cursor: pointer;
            transition: color 0.2s ease;
        }

        .modal-close:hover {
            color: var(--text-primary);
        }

        .modal-box h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .modal-box .modal-desc {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .modal-box .btn-primary {
            width: 100%;
            justify-content: center;
            padding: 14px 24px;
            font-size: 16px;
        }

        .modal-box .modal-alt {
            display: block;
            text-align: center;
            margin-top: 16px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .modal-box .modal-alt a {
            color: var(--primary);
            font-weight: 500;
        }

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

        @media (max-width: 900px) {
            .demo-block {
                flex-direction: column !important;
                gap: 32px;
            }
            .demo-image {
                width: 100%;
                min-height: 240px;
            }
            .hero-title {
                font-size: 36px;
            }
            .hero-subtitle {
                font-size: 18px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 60px;
                --gutter: 20px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 16px;
                margin-bottom: 36px;
            }

            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav {
                display: flex;
            }

            .hero-title {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
                text-align: center;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }
            .proof-grid {
                grid-template-columns: 1fr;
            }
            .testimonials {
                grid-template-columns: 1fr;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin-left: auto;
                margin-right: auto;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .pricing-card.featured .badge {
                right: 16px;
            }

            .float-cta {
                width: 48px;
                height: 48px;
                font-size: 20px;
                bottom: 20px;
                right: 20px;
            }

            .faq-question h4 {
                font-size: 16px;
            }
            .faq-answer {
                padding-left: 0 !important;
            }
            .faq-item.open .faq-answer {
                padding-left: 0 !important;
            }

            .modal-box {
                padding: 28px 20px;
            }

            .cta-banner h2 {
                font-size: 26px;
            }
            .cta-banner p {
                font-size: 16px;
            }
            .cta-banner .btn-primary {
                width: 100%;
                justify-content: center;
            }

            .demo-text h2 {
                font-size: 26px;
            }

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

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-title {
                font-size: 24px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero {
                min-height: 60vh;
            }
            .logo {
                font-size: 18px;
            }
            .logo svg {
                width: 26px;
                height: 26px;
            }
            .section-title {
                font-size: 22px;
            }
            .demo-text h2 {
                font-size: 22px;
            }
            .pricing-card .price {
                font-size: 38px;
            }
            .news-card {
                padding: 20px 16px;
            }
            .feature-card {
                padding: 24px 16px;
            }
            .testimonial-card {
                padding: 20px 16px;
            }
            .footer {
                padding-top: 40px;
            }
            .footer-grid {
                gap: 24px;
            }
        }

        /* ===== Helper ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
    :root {
        --primary: #1B4F72;
        --primary-dark: #0D2B40;
        --accent: #F2994A;
        --accent-hover: #e0883a;
        --accent-light: rgba(242,153,74,0.12);
        --bg: #F8FAFC;
        --bg-alt: #EDF2F7;
        --card-bg: #FFFFFF;
        --text: #1E293B;
        --text-secondary: #64748B;
        --text-muted: #94A3B8;
        --border: #E2E8F0;
        --radius-sm: 4px;
        --radius-md: 8px;
        --radius-lg: 16px;
        --shadow-sm: 0 4px 20px rgba(27,79,114,0.06);
        --shadow-hover: 0 12px 40px rgba(27,79,114,0.10);
        --shadow-btn: 0 4px 12px rgba(242,153,74,0.25);
        --shadow-btn-hover: 0 6px 20px rgba(242,153,74,0.35);
        --font-sans: 'Noto Sans SC', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
        --font-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;
        --container: 1200px;
        --gap: 32px;
        --gap-sm: 20px;
        --section-space: 80px;
        --section-space-sm: 48px;
        --header-height: 72px;
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ========== Reset & Base ========== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    ul, ol { list-style: none; }
    button { cursor: pointer; font-family: inherit; border: none; background: none; }
    input, textarea { font-family: inherit; outline: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.2; color: var(--text); }

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

    /* ========== 导航 ========== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border-bottom: 1px solid var(--border);
        height: var(--header-height);
        display: flex;
        align-items: center;
    }
    .header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--primary);
        font-weight: 700;
        font-size: 20px;
        letter-spacing: 0.5px;
        transition: opacity var(--transition);
    }
    .logo:hover { color: var(--primary); opacity: 0.88; }
    .logo svg { width: 32px; height: 32px; flex-shrink: 0; }
    .logo span { white-space: nowrap; }
    .nav-links {
        display: flex;
        align-items: center;
        gap: var(--gap);
    }
    .nav-links a {
        font-size: 15px;
        font-weight: 500;
        color: var(--primary);
        padding: 6px 0;
        position: relative;
        transition: color var(--transition);
    }
    .nav-links a::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--accent);
        transition: width var(--transition);
        border-radius: 2px;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after { width: 100%; }
    .nav-links a:hover { color: var(--accent); }
    .nav-links a.active { color: var(--accent); }
    .nav-links .nav-cta {
        background: var(--accent);
        color: #fff;
        padding: 10px 24px;
        border-radius: var(--radius-md);
        font-weight: 600;
        box-shadow: var(--shadow-btn);
        transition: all var(--transition);
        letter-spacing: 0.3px;
    }
    .nav-links .nav-cta::after { display: none; }
    .nav-links .nav-cta:hover {
        background: var(--accent-hover);
        box-shadow: var(--shadow-btn-hover);
        transform: scale(1.02);
        color: #fff;
    }
    .nav-links .nav-cta i { margin-right: 6px; }
    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 8px;
        background: none;
        border: none;
        cursor: pointer;
        z-index: 1100;
    }
    .hamburger span {
        display: block;
        width: 26px;
        height: 2.5px;
        background: var(--primary);
        border-radius: 3px;
        transition: all var(--transition);
        transform-origin: center;
    }
    .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
    .mobile-menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(27,79,114,0.96);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        z-index: 1050;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 28px;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.4s ease;
    }
    .mobile-menu.open {
        opacity: 1;
        pointer-events: all;
    }
    .mobile-menu a {
        color: #fff;
        font-size: 22px;
        font-weight: 500;
        letter-spacing: 1px;
        transition: color var(--transition);
    }
    .mobile-menu a:hover { color: var(--accent); }
    .mobile-menu .nav-cta {
        background: var(--accent);
        color: #fff;
        padding: 14px 40px;
        border-radius: var(--radius-md);
        font-size: 18px;
        font-weight: 600;
        box-shadow: var(--shadow-btn);
    }
    .mobile-menu .nav-cta:hover { background: var(--accent-hover); color: #fff; }

    @media (max-width: 768px) {
        .nav-links { display: none; }
        .hamburger { display: flex; }
        .mobile-menu { display: flex; }
        .header .container { padding: 0 16px; }
        .logo { font-size: 17px; }
        .logo svg { width: 28px; height: 28px; }
    }
    @media (min-width: 769px) {
        .mobile-menu { display: none !important; }
    }

    /* ========== 面包屑 ========== */
    .breadcrumb {
        padding: 100px 0 20px;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
    }
    .breadcrumb .container {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 14px;
        color: var(--text-muted);
    }
    .breadcrumb a {
        color: var(--primary);
        font-weight: 500;
    }
    .breadcrumb a:hover { color: var(--accent); }
    .breadcrumb .sep { color: var(--text-muted); font-size: 12px; }
    .breadcrumb .current { color: var(--text-secondary); }

    /* ========== 文章主区 ========== */
    .article-main {
        padding: 40px 0 var(--section-space);
    }
    .article-wrapper {
        max-width: 800px;
        margin: 0 auto;
        background: var(--card-bg);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        padding: 48px 56px;
    }
    @media (max-width: 768px) {
        .article-wrapper { padding: 28px 20px; border-radius: var(--radius-md); }
    }
    .article-header {
        margin-bottom: 36px;
        border-bottom: 1px solid var(--border);
        padding-bottom: 28px;
    }
    .article-header h1 {
        font-size: 36px;
        font-weight: 700;
        color: var(--primary);
        line-height: 1.25;
        margin-bottom: 16px;
    }
    @media (max-width: 768px) {
        .article-header h1 { font-size: 26px; }
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 16px 24px;
        align-items: center;
        font-size: 14px;
        color: var(--text-muted);
    }
    .article-meta .category-tag {
        background: var(--accent-light);
        color: var(--accent);
        padding: 4px 14px;
        border-radius: 20px;
        font-weight: 600;
        font-size: 13px;
    }
    .article-meta .date {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .article-meta .date i { font-size: 14px; }
    .article-meta .views {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .article-meta .views i { font-size: 14px; }

    /* ========== 正文排版 ========== */
    .article-content {
        font-size: 16px;
        line-height: 1.8;
        color: var(--text);
    }
    .article-content h2 {
        font-size: 28px;
        font-weight: 600;
        margin: 40px 0 16px;
        color: var(--primary);
        line-height: 1.3;
    }
    .article-content h3 {
        font-size: 22px;
        font-weight: 600;
        margin: 32px 0 12px;
        color: var(--primary);
        line-height: 1.3;
    }
    .article-content p {
        margin-bottom: 18px;
        color: var(--text);
    }
    .article-content img {
        width: 100%;
        border-radius: 12px;
        margin: 24px 0;
        box-shadow: var(--shadow-sm);
    }
    .article-content figcaption,
    .article-content .img-caption {
        text-align: center;
        font-size: 14px;
        color: var(--text-muted);
        margin-top: -12px;
        margin-bottom: 24px;
    }
    .article-content blockquote {
        border-left: 4px solid var(--accent);
        background: var(--bg-alt);
        padding: 20px 24px;
        margin: 24px 0;
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        color: var(--text-secondary);
        font-style: italic;
    }
    .article-content ul,
    .article-content ol {
        margin: 16px 0 20px;
        padding-left: 24px;
    }
    .article-content ul li {
        list-style: disc;
        margin-bottom: 8px;
        color: var(--text);
    }
    .article-content ol li {
        list-style: decimal;
        margin-bottom: 8px;
        color: var(--text);
    }
    .article-content a {
        color: var(--accent);
        font-weight: 500;
        text-decoration: underline;
        text-underline-offset: 3px;
    }
    .article-content a:hover { color: var(--accent-hover); }

    @media (max-width: 768px) {
        .article-content { font-size: 15px; line-height: 1.75; }
        .article-content h2 { font-size: 24px; }
        .article-content h3 { font-size: 19px; }
        .article-content blockquote { padding: 16px 18px; }
    }

    /* ========== 未找到文章 ========== */
    .article-not-found {
        text-align: center;
        padding: 80px 20px;
        color: var(--text-secondary);
    }
    .article-not-found i {
        font-size: 64px;
        color: var(--text-muted);
        margin-bottom: 24px;
        display: block;
    }
    .article-not-found h2 {
        font-size: 28px;
        color: var(--primary);
        margin-bottom: 12px;
    }
    .article-not-found p {
        font-size: 16px;
        margin-bottom: 24px;
    }
    .article-not-found .btn-back {
        display: inline-block;
        padding: 12px 32px;
        background: var(--primary);
        color: #fff;
        border-radius: var(--radius-md);
        font-weight: 600;
        transition: all var(--transition);
    }
    .article-not-found .btn-back:hover {
        background: var(--accent);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: var(--shadow-btn);
    }

    /* ========== 相关推荐 ========== */
    .related-section {
        margin-top: 48px;
        padding-top: 36px;
        border-top: 1px solid var(--border);
    }
    .related-section h3 {
        font-size: 22px;
        font-weight: 600;
        color: var(--primary);
        margin-bottom: 24px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .related-section h3 i { color: var(--accent); font-size: 20px; }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    @media (max-width: 600px) {
        .related-grid { grid-template-columns: 1fr; }
    }
    .related-card {
        background: var(--bg-alt);
        border-radius: var(--radius-md);
        padding: 20px;
        transition: all var(--transition);
        border: 1px solid transparent;
    }
    .related-card:hover {
        background: var(--card-bg);
        box-shadow: var(--shadow-hover);
        border-color: var(--border);
        transform: translateY(-3px);
    }
    .related-card .rc-tag {
        font-size: 12px;
        color: var(--accent);
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 6px;
        display: block;
    }
    .related-card h4 {
        font-size: 16px;
        font-weight: 600;
        color: var(--primary);
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .related-card h4 a { color: inherit; }
    .related-card h4 a:hover { color: var(--accent); }
    .related-card .rc-meta {
        font-size: 13px;
        color: var(--text-muted);
        display: flex;
        gap: 12px;
        align-items: center;
    }
    .related-card .rc-meta span { display: flex; align-items: center; gap: 4px; }

    /* ========== 返回首页 ========== */
    .back-home {
        margin-top: 36px;
        text-align: center;
    }
    .back-home a {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 15px;
        font-weight: 500;
        color: var(--primary);
        padding: 10px 28px;
        border-radius: var(--radius-md);
        border: 1.5px solid var(--border);
        transition: all var(--transition);
    }
    .back-home a:hover {
        border-color: var(--accent);
        color: var(--accent);
        background: var(--accent-light);
        transform: translateY(-2px);
    }

    /* ========== 按钮通用 ========== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: var(--radius-md);
        font-weight: 600;
        font-size: 15px;
        transition: all var(--transition);
        min-height: 48px;
        border: none;
        cursor: pointer;
        line-height: 1.2;
    }
    .btn-primary {
        background: var(--accent);
        color: #fff;
        box-shadow: var(--shadow-btn);
    }
    .btn-primary:hover {
        background: var(--accent-hover);
        box-shadow: var(--shadow-btn-hover);
        transform: scale(1.02);
        color: #fff;
    }
    .btn-outline {
        background: transparent;
        color: var(--primary);
        border: 2px solid var(--primary);
    }
    .btn-outline:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-2px);
    }
    .btn-text {
        background: transparent;
        color: var(--primary);
        padding: 8px 16px;
        min-height: auto;
    }
    .btn-text:hover { color: var(--accent); text-decoration: underline; }
    .btn:disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

    /* ========== 标签/徽章 ========== */
    .badge {
        display: inline-block;
        padding: 3px 12px;
        border-radius: 20px;
        font-size: 12px;
        font-weight: 600;
        background: var(--accent-light);
        color: var(--accent);
        letter-spacing: 0.3px;
    }

    /* ========== 页脚 ========== */
    .footer {
        background: var(--primary);
        color: rgba(255,255,255,0.92);
        padding: 60px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
    }
    @media (max-width: 1024px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    }
    @media (max-width: 600px) {
        .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    }
    .footer-brand .logo {
        color: #fff;
        font-size: 20px;
        margin-bottom: 16px;
        display: inline-flex;
    }
    .footer-brand .logo:hover { color: #fff; opacity: 0.9; }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        color: rgba(255,255,255,0.7);
        max-width: 320px;
    }
    .footer h4 {
        font-size: 16px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 16px;
        letter-spacing: 0.5px;
    }
    .footer-links { display: flex; flex-direction: column; gap: 10px; }
    .footer-links a {
        color: rgba(255,255,255,0.7);
        font-size: 14px;
        transition: color var(--transition);
    }
    .footer-links a:hover { color: var(--accent); }
    .footer-contact p {
        font-size: 14px;
        color: rgba(255,255,255,0.7);
        margin-bottom: 8px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .footer-contact i { width: 18px; color: var(--accent); }
    .footer-social {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }
    .footer-social a {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 42px;
        height: 42px;
        border-radius: 50%;
        border: 1.5px solid rgba(255,255,255,0.25);
        color: rgba(255,255,255,0.8);
        font-size: 18px;
        transition: all var(--transition);
    }
    .footer-social a:hover {
        background: var(--accent);
        border-color: var(--accent);
        color: #fff;
        transform: translateY(-3px);
    }
    .footer-bottom {
        margin-top: 48px;
        padding: 20px 0;
        background: var(--primary-dark);
        text-align: center;
        font-size: 13px;
        color: rgba(255,255,255,0.5);
        letter-spacing: 0.5px;
    }
    @media (max-width: 768px) {
        .footer { padding: 40px 0 0; }
        .footer-bottom { margin-top: 32px; padding: 16px 0; }
    }

    /* ========== 浮动CTA ========== */
    .float-cta {
        position: fixed;
        bottom: 32px;
        right: 32px;
        z-index: 999;
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: var(--accent);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        box-shadow: 0 6px 24px rgba(242,153,74,0.4);
        transition: all var(--transition);
        cursor: pointer;
        border: none;
    }
    .float-cta:hover {
        transform: scale(1.08) translateY(-4px);
        box-shadow: 0 12px 36px rgba(242,153,74,0.5);
        color: #fff;
    }
    .float-cta i { line-height: 1; }
    @media (max-width: 768px) {
        .float-cta { width: 48px; height: 48px; font-size: 20px; bottom: 24px; right: 24px; }
    }

    /* ========== 其他辅助 ========== */
    .sr-only {
        position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
        overflow: hidden; clip: rect(0,0,0,0); border: 0;
    }
    .text-center { text-align: center; }
    .mt-16 { margin-top: 16px; }
    .mt-24 { margin-top: 24px; }
    .mb-16 { margin-bottom: 16px; }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
        :root { --section-space: 60px; }
    }
    @media (max-width: 768px) {
        :root { --section-space: 48px; --section-space-sm: 32px; }
        .breadcrumb { padding: 88px 0 16px; }
        .article-main { padding: 24px 0 var(--section-space); }
    }
    @media (max-width: 520px) {
        .article-header h1 { font-size: 22px; }
        .article-meta { gap: 10px 16px; font-size: 13px; }
        .related-card h4 { font-size: 15px; }
    }

/* roulang page: category1 */
/* ===== DESIGN TOKENS ===== */
        :root {
            --primary: #1B4F72;
            --primary-dark: #0D2B40;
            --primary-light: #2C6F9B;
            --secondary: #F2994A;
            --secondary-light: #F5B06A;
            --secondary-dark: #D9822E;
            --bg-main: #F8FAFC;
            --bg-alt: #EDF2F7;
            --bg-card: #FFFFFF;
            --text-primary: #1E293B;
            --text-secondary: #475569;
            --text-muted: #64748B;
            --text-light: #94A3B8;
            --border-color: #E2E8F0;
            --radius-lg: 16px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --shadow-card: 0 4px 20px rgba(27,79,114,0.06);
            --shadow-card-hover: 0 12px 40px rgba(27,79,114,0.10);
            --shadow-btn: 0 4px 12px rgba(242,153,74,0.25);
            --shadow-btn-hover: 0 6px 20px rgba(242,153,74,0.35);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;
            --gap-section: 80px;
            --gap-section-mobile: 48px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.2;
            font-weight: 600;
            color: var(--text-primary);
        }

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

        /* ===== HEADER / NAVIGATION ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo svg {
            width: 32px;
            height: 32px;
            color: var(--secondary);
            flex-shrink: 0;
        }
        .logo span {
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 16px;
            font-weight: 500;
            color: var(--primary);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .nav-links a:hover {
            color: var(--secondary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--secondary);
        }
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-links a.nav-cta {
            background: var(--secondary);
            color: #fff;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a.nav-cta i {
            font-size: 14px;
        }
        .nav-links a.nav-cta:hover {
            background: var(--secondary-dark);
            transform: scale(1.02);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }
        .nav-links a.nav-cta::after {
            display: none;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-md);
            transition: background var(--transition);
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: all var(--transition);
            margin: 3px 0;
        }
        .hamburger:hover {
            background: rgba(242, 153, 74, 0.1);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        /* Mobile menu overlay */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(27, 79, 114, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 999;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 28px;
            opacity: 0;
            transition: opacity 0.4s ease;
            pointer-events: none;
        }
        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu a {
            font-size: 22px;
            font-weight: 500;
            color: #fff;
            text-decoration: none;
            transition: color var(--transition);
            padding: 8px 16px;
            border-radius: var(--radius-md);
        }
        .mobile-menu a:hover {
            color: var(--secondary);
            background: rgba(255, 255, 255, 0.1);
        }
        .mobile-menu a.active {
            color: var(--secondary);
            border-bottom: 2px solid var(--secondary);
        }
        .mobile-menu a.nav-cta-mobile {
            background: var(--secondary);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 12px;
        }
        .mobile-menu a.nav-cta-mobile:hover {
            background: var(--secondary-dark);
            color: #fff;
        }

        /* ===== HERO ===== */
        .hero {
            background: var(--primary);
            min-height: 70vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding: 120px 0 80px;
            margin-top: 68px;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 60%;
            height: 80%;
            background: radial-gradient(circle at 30% 40%, rgba(242, 153, 74, 0.15), transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero h1 {
            font-size: 48px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero .hero-sub {
            font-size: 20px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.85);
            max-width: 720px;
            margin: 0 auto 36px;
            line-height: 1.6;
        }
        .hero .hero-buttons {
            display: flex;
            gap: 18px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero .btn-primary {
            background: var(--secondary);
            color: #fff;
            padding: 16px 44px;
            border-radius: var(--radius-md);
            font-size: 18px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .hero .btn-primary:hover {
            background: var(--secondary-dark);
            transform: scale(1.02);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }
        .hero .btn-secondary {
            background: transparent;
            color: #fff;
            padding: 16px 44px;
            border-radius: var(--radius-md);
            font-size: 18px;
            font-weight: 500;
            border: 2px solid rgba(255, 255, 255, 0.5);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .hero .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: scale(1.02);
            color: #fff;
        }

        /* ===== SECTION COMMON ===== */
        .section {
            padding: var(--gap-section) 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            font-size: 32px;
            font-weight: 600;
            text-align: center;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-sub {
            font-size: 16px;
            color: var(--text-muted);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        /* ===== GRID 2-COL ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        /* ===== CARDS ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card .card-icon {
            width: 52px;
            height: 52px;
            background: rgba(27, 79, 114, 0.08);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--secondary);
            margin-bottom: 16px;
        }
        .card h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .card p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== FEATURE / SCENE BLOCK ===== */
        .scene-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 60px;
        }
        .scene-block:last-child {
            margin-bottom: 0;
        }
        .scene-block.reverse {
            direction: rtl;
        }
        .scene-block.reverse .scene-text {
            direction: ltr;
        }
        .scene-block.reverse .scene-image {
            direction: ltr;
        }
        .scene-text h3 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .scene-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .scene-text .scene-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }
        .scene-text .scene-tags span {
            background: var(--bg-alt);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
        }
        .scene-image img {
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            object-fit: cover;
            aspect-ratio: 3/2;
        }

        /* ===== STEPS ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: box-shadow var(--transition), transform var(--transition);
            position: relative;
        }
        .step-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: block;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            border-radius: 50%;
            line-height: 48px;
            text-align: center;
            margin: 0 auto 16px;
            font-family: var(--font-en);
        }
        .step-item h4 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== DATA / STATS ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-en);
            line-height: 1.1;
        }
        .stat-item .stat-label {
            font-size: 16px;
            color: var(--text-muted);
            margin-top: 8px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 0;
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-color);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 0;
            cursor: pointer;
            user-select: none;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
            transition: background var(--transition);
            font-family: var(--font-en);
        }
        .faq-question h4 {
            font-size: 18px;
            font-weight: 500;
            color: var(--text-primary);
            flex: 1;
            margin: 0;
            line-height: 1.4;
        }
        .faq-question .faq-toggle {
            font-size: 20px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
            font-weight: 300;
            width: 24px;
            text-align: center;
        }
        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            color: var(--secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 0 0 42px;
        }
        .faq-answer p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding-bottom: 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        /* ===== CTA BANNER ===== */
        .cta-banner {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 50%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(242, 153, 74, 0.12), transparent 70%);
            pointer-events: none;
        }
        .cta-banner h2 {
            font-size: 32px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-cta {
            background: var(--secondary);
            color: #fff;
            padding: 16px 48px;
            border-radius: var(--radius-md);
            font-size: 18px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-cta:hover {
            background: var(--secondary-dark);
            transform: scale(1.02);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }

        /* ===== FOOTER ===== */
        .footer {
            background: var(--primary);
            color: #fff;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .footer-brand .logo svg {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer h4 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer-links a:hover {
            color: var(--secondary);
        }
        .footer-contact p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            width: 18px;
            color: var(--secondary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 44px;
            height: 44px;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            transition: background var(--transition), border-color var(--transition), color var(--transition);
            text-decoration: none;
        }
        .footer-social a:hover {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
        }
        .footer-bottom {
            background: var(--primary-dark);
            padding: 20px 0;
            margin-top: 48px;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== FLOATING CTA ===== */
        .float-cta {
            position: fixed;
            bottom: 28px;
            right: 28px;
            z-index: 9999;
            width: 60px;
            height: 60px;
            background: var(--secondary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            box-shadow: var(--shadow-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            cursor: pointer;
            border: none;
            text-decoration: none;
        }
        .float-cta:hover {
            background: var(--secondary-dark);
            transform: scale(1.08);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }
        .float-cta:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 4px;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1199px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 991px) {
            .hero h1 {
                font-size: 38px;
            }
            .hero .hero-sub {
                font-size: 18px;
            }
            .section-title {
                font-size: 28px;
            }
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .scene-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .scene-block.reverse {
                direction: ltr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-banner {
                padding: 40px 28px;
            }
            .cta-banner h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --gap-section: var(--gap-section-mobile);
            }
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            .header .container {
                height: 60px;
            }
            .logo {
                font-size: 17px;
            }
            .logo svg {
                width: 28px;
                height: 28px;
            }
            .hero {
                padding: 100px 0 60px;
                min-height: 60vh;
                margin-top: 60px;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero .hero-sub {
                font-size: 16px;
                margin-bottom: 28px;
            }
            .hero .btn-primary,
            .hero .btn-secondary {
                padding: 14px 32px;
                font-size: 16px;
                width: 100%;
                justify-content: center;
            }
            .hero .hero-buttons {
                flex-direction: column;
                gap: 12px;
            }
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 15px;
                margin-bottom: 32px;
            }
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .stat-item .stat-number {
                font-size: 32px;
            }
            .card h3 {
                font-size: 20px;
            }
            .scene-text h3 {
                font-size: 22px;
            }
            .faq-question h4 {
                font-size: 16px;
            }
            .faq-answer p {
                font-size: 15px;
            }
            .cta-banner {
                padding: 32px 20px;
            }
            .cta-banner h2 {
                font-size: 22px;
            }
            .cta-banner p {
                font-size: 15px;
            }
            .cta-banner .btn-cta {
                padding: 14px 36px;
                font-size: 16px;
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .float-cta {
                width: 50px;
                height: 50px;
                font-size: 22px;
                bottom: 20px;
                right: 20px;
            }
            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 420px) {
            .hero h1 {
                font-size: 26px;
            }
            .hero .hero-sub {
                font-size: 15px;
            }
            .section-title {
                font-size: 22px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 28px;
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1B4F72;
            --primary-dark: #0D2B40;
            --primary-light: #2C6E9C;
            --secondary: #F2994A;
            --secondary-hover: #E8873A;
            --secondary-light: rgba(242, 153, 74, 0.10);
            --bg-main: #F8FAFC;
            --bg-alt: #EDF2F7;
            --bg-card: #FFFFFF;
            --text-primary: #1E293B;
            --text-secondary: #475569;
            --text-muted: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --border-light: #CBD5E1;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 4px 20px rgba(27, 79, 114, 0.06);
            --shadow-hover: 0 12px 40px rgba(27, 79, 114, 0.10);
            --shadow-btn: 0 4px 12px rgba(242, 153, 74, 0.25);
            --shadow-btn-hover: 0 6px 20px rgba(242, 153, 74, 0.35);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::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: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-main);
            padding-top: var(--header-height);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.2;
            font-weight: 600;
            color: var(--text-primary);
        }

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

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            white-space: nowrap;
        }
        .logo svg {
            width: 32px;
            height: 32px;
            color: var(--secondary);
            flex-shrink: 0;
        }
        .logo span {
            color: var(--primary);
        }
        .logo:hover span {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition);
        }
        .nav-links a:hover {
            color: var(--secondary);
        }
        .nav-links a.active {
            color: var(--secondary);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .nav-links a.nav-cta {
            background: var(--secondary);
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            box-shadow: var(--shadow-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .nav-links a.nav-cta:hover {
            background: var(--secondary-hover);
            transform: scale(1.02);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }
        .nav-links a.nav-cta i {
            margin-right: 6px;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 8px;
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(27, 79, 114, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }
        .mobile-menu.open {
            display: flex;
            opacity: 1;
            pointer-events: all;
        }
        .mobile-menu a {
            font-size: 22px;
            font-weight: 500;
            color: #fff;
            text-decoration: none;
            transition: color var(--transition);
        }
        .mobile-menu a:hover {
            color: var(--secondary);
        }
        .mobile-menu a.active {
            color: var(--secondary);
            border-bottom: 2px solid var(--secondary);
        }
        .mobile-menu a.nav-cta {
            background: var(--secondary);
            color: #fff;
            padding: 12px 36px;
            border-radius: var(--radius-md);
            font-weight: 600;
            box-shadow: var(--shadow-btn);
        }
        .mobile-menu a.nav-cta:hover {
            background: var(--secondary-hover);
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .logo {
                font-size: 17px;
            }
            .logo svg {
                width: 28px;
                height: 28px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            background: var(--primary);
            min-height: 60vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding: 80px 0 60px;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 70%;
            height: 140%;
            background: radial-gradient(ellipse at top right, rgba(255, 255, 255, 0.06), transparent 70%);
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-main), transparent);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 48px;
            flex-wrap: wrap;
        }
        .hero-text {
            flex: 1 1 500px;
        }
        .hero-text h1 {
            font-size: 44px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            line-height: 1.15;
        }
        .hero-text p {
            font-size: 18px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 600px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-buttons .btn-primary {
            background: var(--secondary);
            color: #fff;
            padding: 16px 44px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 17px;
            box-shadow: var(--shadow-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-buttons .btn-primary:hover {
            background: var(--secondary-hover);
            transform: scale(1.02);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }
        .hero-buttons .btn-secondary {
            background: transparent;
            color: #fff;
            padding: 16px 44px;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 17px;
            border: 2px solid rgba(255, 255, 255, 0.35);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-buttons .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            transform: scale(1.02);
            color: #fff;
        }
        .hero-visual {
            flex: 1 1 360px;
            max-width: 480px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
        }
        .hero-visual img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-lg);
        }
        @media (max-width: 768px) {
            .hero {
                min-height: auto;
                padding: 60px 0 50px;
            }
            .hero-text h1 {
                font-size: 30px;
            }
            .hero-text p {
                font-size: 16px;
            }
            .hero-buttons .btn-primary,
            .hero-buttons .btn-secondary {
                padding: 14px 28px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
            .hero-visual {
                flex: 1 1 100%;
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 26px;
            }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-white {
            background: var(--bg-card);
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 40px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

        /* ===== Feature Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid rgba(226, 232, 240, 0.5);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .feature-card .icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: var(--secondary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--secondary);
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .feature-card h3 {
                font-size: 18px;
            }
        }

        /* ===== Scene / Image + Text ===== */
        .scene-block {
            display: flex;
            align-items: center;
            gap: 56px;
            flex-wrap: wrap;
        }
        .scene-block.reverse {
            flex-direction: row-reverse;
        }
        .scene-text {
            flex: 1 1 400px;
        }
        .scene-text h3 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .scene-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .scene-text ul {
            padding: 0;
            margin-top: 12px;
        }
        .scene-text ul li {
            position: relative;
            padding-left: 26px;
            margin-bottom: 10px;
            font-size: 15px;
            color: var(--text-secondary);
        }
        .scene-text ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-weight: 700;
        }
        .scene-visual {
            flex: 1 1 400px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .scene-visual img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-lg);
        }
        @media (max-width: 768px) {
            .scene-block {
                gap: 32px;
            }
            .scene-text h3 {
                font-size: 22px;
            }
            .scene-text p {
                font-size: 15px;
            }
        }

        /* ===== Stats / Evidence ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 28px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .stat-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .stat-item .number {
            font-size: 40px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 6px;
            font-family: var(--font-en);
        }
        .stat-item .label {
            font-size: 15px;
            color: var(--text-muted);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .number {
                font-size: 32px;
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ===== Steps / Flow ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            position: relative;
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid rgba(226, 232, 240, 0.4);
        }
        .step-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            font-family: var(--font-en);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
        }
        .step-card h4 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-card {
                padding: 24px 20px;
            }
        }

        /* ===== FAQ Accordion ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 0;
            cursor: pointer;
            user-select: none;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .q-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-family: var(--font-en);
        }
        .faq-question h4 {
            font-size: 17px;
            font-weight: 500;
            flex: 1;
            color: inherit;
        }
        .faq-question .toggle-icon {
            font-size: 20px;
            font-weight: 300;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
            width: 24px;
            text-align: center;
            font-family: var(--font-en);
        }
        .faq-item.open .faq-question .toggle-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 0 0 44px;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 0 20px 44px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        @media (max-width: 768px) {
            .faq-question h4 {
                font-size: 15px;
            }
            .faq-answer {
                padding-left: 36px;
            }
            .faq-item.open .faq-answer {
                padding-left: 36px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            left: -10%;
            width: 60%;
            height: 160%;
            background: radial-gradient(ellipse at bottom left, rgba(255, 255, 255, 0.05), transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }
        .cta-section .btn-cta {
            background: var(--secondary);
            color: #fff;
            padding: 18px 52px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 18px;
            box-shadow: var(--shadow-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 12px;
        }
        .cta-section .btn-cta:hover {
            background: var(--secondary-hover);
            transform: scale(1.02);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 52px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 16px;
            }
            .cta-section .btn-cta {
                padding: 16px 36px;
                font-size: 16px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary);
            color: #fff;
            padding: 60px 0 0;
        }
        .footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo {
            margin-bottom: 18px;
            color: #fff;
        }
        .footer-brand .logo span {
            color: #fff;
        }
        .footer-brand .logo svg {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary);
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            width: 20px;
            color: var(--secondary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.8);
            font-size: 18px;
            transition: background var(--transition), border-color var(--transition), color var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
        }
        .footer-bottom {
            background: var(--primary-dark);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom .container {
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== Floating CTA ===== */
        .floating-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 999;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--secondary);
            color: #fff;
            border: none;
            box-shadow: 0 6px 24px rgba(242, 153, 74, 0.4);
            font-size: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .floating-cta:hover {
            background: var(--secondary-hover);
            transform: scale(1.08);
            box-shadow: 0 8px 32px rgba(242, 153, 74, 0.5);
        }
        @media (max-width: 768px) {
            .floating-cta {
                width: 48px;
                height: 48px;
                font-size: 20px;
                bottom: 24px;
                right: 24px;
            }
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            font-size: 12px;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-muted);
        }
        .badge-primary {
            background: var(--primary);
            color: #fff;
        }
        .badge-secondary {
            background: var(--secondary);
            color: #fff;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 20px 0 8px;
            font-size: 14px;
            color: var(--text-light);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .breadcrumb .current {
            color: var(--text-light);
        }
        .breadcrumb span.sep {
            color: var(--text-light);
            margin: 0 4px;
        }

        /* ===== Page Header ===== */
        .page-header {
            background: var(--bg-alt);
            padding: 40px 0 32px;
            border-bottom: 1px solid var(--border);
        }
        .page-header h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .page-header p {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 700px;
        }
        @media (max-width: 768px) {
            .page-header {
                padding: 28px 0 24px;
            }
            .page-header h1 {
                font-size: 28px;
            }
        }

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

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 24px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .scene-text h3 {
                font-size: 20px;
            }
            .stat-item .number {
                font-size: 28px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .footer {
                padding: 40px 0 0;
            }
            .footer-grid {
                gap: 24px;
            }
        }