/* roulang page: index */
:root {
            --primary: #0f2a4a;
            --primary-light: #1a3a5c;
            --primary-dark: #091b30;
            --accent: #ff7a1a;
            --accent-dark: #e5670a;
            --bg: #f8fafc;
            --bg-alt: #f1f5f9;
            --text: #0f172a;
            --text-muted: #6b7a8f;
            --border: #e2e8f0;
            --radius: 14px;
            --shadow-sm: 0 1px 3px rgba(15, 42, 74, .06);
            --shadow-md: 0 6px 16px rgba(15, 42, 74, .08);
            --shadow-lg: 0 16px 40px rgba(15, 42, 74, .14);
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .25s;
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.18rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .brand-logo i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0 auto;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: .92rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: all .25s;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(15, 42, 74, .05);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(15, 42, 74, .08);
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .search-box {
            position: relative;
        }
        .search-box i {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: .85rem;
            pointer-events: none;
        }
        .search-box input {
            width: 220px;
            height: 40px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: var(--bg);
            padding: 0 16px 0 38px;
            font-size: .88rem;
            transition: all .25s;
        }
        .search-box input:focus {
            border-color: var(--accent);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(255, 122, 26, .12);
            width: 260px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            font-size: .92rem;
            font-weight: 600;
            cursor: pointer;
            transition: all .3s ease;
            border: 1px solid transparent;
            line-height: 1.4;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 122, 26, .25);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 122, 26, .3);
        }
        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border-color: rgba(15, 42, 74, .2);
        }
        .btn-ghost:hover {
            background: rgba(15, 42, 74, .04);
            border-color: var(--primary);
        }
        .btn-primary-lg {
            background: var(--primary);
            color: #fff;
            padding: 14px 34px;
            font-size: 1rem;
            box-shadow: 0 6px 18px rgba(15, 42, 74, .25);
        }
        .btn-primary-lg:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(15, 42, 74, .3);
        }
        .btn-accent-lg {
            background: var(--accent);
            color: #fff;
            padding: 14px 34px;
            font-size: 1rem;
            box-shadow: 0 6px 18px rgba(255, 122, 26, .3);
        }
        .btn-accent-lg:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(255, 122, 26, .35);
        }
        .btn-ghost-lg {
            background: rgba(255, 255, 255, .1);
            color: #fff;
            padding: 14px 34px;
            font-size: 1rem;
            border: 1px solid rgba(255, 255, 255, .3);
            backdrop-filter: blur(4px);
        }
        .btn-ghost-lg:hover {
            background: rgba(255, 255, 255, .2);
            border-color: rgba(255, 255, 255, .6);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
        }
        .menu-toggle span {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all .3s;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            background-size: cover;
            background-position: center;
            min-height: 560px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(9, 27, 48, .92) 0%, rgba(15, 42, 74, .72) 50%, rgba(15, 42, 74, .35) 100%);
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            padding: 80px 24px;
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 122, 26, .15);
            border: 1px solid rgba(255, 122, 26, .4);
            color: #ffb27a;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: .8rem;
            font-weight: 600;
            letter-spacing: .02em;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
        }
        .hero-subtitle {
            font-size: clamp(1rem, 2vw, 1.15rem);
            color: rgba(255, 255, 255, .85);
            max-width: 560px;
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .hero-meta {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, .8);
            font-size: .88rem;
        }
        .hero-meta span i {
            color: #4ade80;
        }

        /* ===== Section spacing ===== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg);
        }
        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }
        .section-tag {
            display: inline-block;
            background: rgba(255, 122, 26, .1);
            color: var(--accent-dark);
            font-size: .78rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 999px;
            letter-spacing: .04em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.8;
        }

        /* ===== Stats ===== */
        .stats-strip {
            background: var(--primary);
            background-image: linear-gradient(135deg, #0f2a4a, #1a3a5c);
            padding: 56px 0;
            border-radius: 0;
            position: relative;
            overflow: hidden;
        }
        .stats-strip::before {
            content: "";
            position: absolute;
            top: -60%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: rgba(255, 122, 26, .08);
            border-radius: 50%;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 2;
        }
        .stat-item {
            text-align: center;
            padding: 20px;
        }
        .stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            display: block;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-num i {
            color: var(--accent);
            font-size: 1.8rem;
            margin-right: 6px;
            font-style: normal;
        }
        .stat-label {
            font-size: .9rem;
            color: rgba(255, 255, 255, .7);
            margin-top: 6px;
            display: block;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-dark));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .4s ease;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(255, 122, 26, .3);
        }
        .feature-card:hover::after {
            transform: scaleX(1);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            background: rgba(15, 42, 74, .06);
            color: var(--primary);
            margin-bottom: 20px;
            transition: all .3s;
        }
        .feature-card:hover .feature-icon {
            background: var(--accent);
            color: #fff;
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: .9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Category cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .category-card {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: flex-end;
            transition: all .4s ease;
            box-shadow: var(--shadow-sm);
        }
        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }
        .category-card:hover img {
            transform: scale(1.05);
        }
        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(9, 27, 48, .9) 0%, rgba(9, 27, 48, .3) 60%, transparent 100%);
        }
        .category-content {
            position: relative;
            z-index: 2;
            padding: 32px;
            width: 100%;
        }
        .category-content h3 {
            color: #fff;
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .category-content p {
            color: rgba(255, 255, 255, .8);
            font-size: .9rem;
            line-height: 1.7;
            margin-bottom: 16px;
            max-width: 360px;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #ffb27a;
            font-size: .88rem;
            font-weight: 600;
            transition: gap .25s;
        }
        .category-link:hover {
            gap: 10px;
            color: var(--accent);
        }

        /* ===== News list ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .news-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: rgba(255, 122, 26, .3);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .news-cat {
            display: inline-block;
            background: rgba(15, 42, 74, .07);
            color: var(--primary);
            font-size: .75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
        }
        .news-date {
            font-size: .78rem;
            color: var(--text-muted);
        }
        .news-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .news-card p {
            font-size: .9rem;
            color: var(--text-muted);
            line-height: 1.7;
            flex-grow: 1;
        }
        .news-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 18px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .news-footer a {
            font-size: .85rem;
            color: var(--accent-dark);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .empty-tip {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: .95rem;
            background: #fff;
            border: 1px dashed var(--border);
            border-radius: var(--radius);
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--primary);
            background-image: radial-gradient(circle at 20% 30%, rgba(255, 122, 26, .12), transparent 40%), linear-gradient(135deg, #0f2a4a, #0b1f38);
        }
        .steps-section .section-header h2 {
            color: #fff;
        }
        .steps-section .section-header p {
            color: rgba(255, 255, 255, .7);
        }
        .steps-section .section-tag {
            background: rgba(255, 122, 26, .2);
            color: #ffb27a;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .step-card {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 20px;
            padding: 40px 30px;
            text-align: center;
            transition: all .3s;
            position: relative;
        }
        .step-card:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-6px);
            border-color: rgba(255, 122, 26, .4);
        }
        .step-num {
            font-size: 3rem;
            font-weight: 800;
            color: rgba(255, 122, 26, .6);
            line-height: 1;
            margin-bottom: 16px;
            font-family: Georgia, serif;
        }
        .step-card h3 {
            color: #fff;
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            color: rgba(255, 255, 255, .7);
            font-size: .9rem;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-wrapper {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .3s;
        }
        .faq-item.active {
            border-color: rgba(255, 122, 26, .4);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: .98rem;
            font-weight: 600;
            color: var(--text);
            transition: background .2s;
            gap: 16px;
        }
        .faq-question:hover {
            background: rgba(15, 42, 74, .02);
        }
        .faq-question i {
            color: var(--accent);
            transition: transform .3s;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .4s ease;
            color: var(--text-muted);
            font-size: .9rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            padding: 0 24px 20px;
            max-height: 500px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: rgba(255, 122, 26, .15);
            border-radius: 50%;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            color: #fff;
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, .8);
            font-size: 1.02rem;
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #081422;
            color: rgba(255, 255, 255, .75);
            padding: 70px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand .brand-logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: .88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, .6);
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: .9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: .02em;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: .87rem;
            color: rgba(255, 255, 255, .6);
            transition: color .25s;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding-top: 26px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: .8rem;
            color: rgba(255, 255, 255, .4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, .4);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                gap: 16px;
            }
            .search-box {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                gap: 8px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                display: none;
                z-index: 99;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                text-align: center;
                padding: 12px;
            }
            .menu-toggle {
                display: flex;
            }
            .header-actions .btn-accent {
                display: none;
            }
            .hero {
                min-height: 500px;
            }
            .hero-inner {
                padding: 60px 24px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .section {
                padding: 60px 0;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .brand-logo {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-meta {
                gap: 14px;
                flex-direction: column;
            }
            .stats-num {
                font-size: 1.8rem;
            }
            .category-content {
                padding: 20px;
            }
            .category-content h3 {
                font-size: 1.2rem;
            }
            .faq-question {
                font-size: .9rem;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: .85rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --primary-light: #EEF2FF;
            --accent: #06B6D4;
            --accent-light: #ECFEFF;
            --dark: #0F172A;
            --text: #334155;
            --text-weak: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --bg: #F8FAFC;
            --white: #FFFFFF;
            --radius: 16px;
            --radius-sm: 8px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.10);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

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

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: 72px;
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 28px;
            height: 72px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: var(--dark);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .brand-logo i {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #4F46E5, #06B6D4);
            border-radius: 10px;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
        }

        .nav-link {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: #475569;
            transition: all .2s ease;
            position: relative;
        }

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

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .command-search {
            display: flex;
            align-items: center;
            gap: 8px;
            height: 40px;
            padding: 0 14px;
            background: #F1F5F9;
            border: 1px solid transparent;
            border-radius: 10px;
            font-size: 14px;
            color: var(--text-weak);
            cursor: pointer;
            transition: all .2s ease;
            min-width: 180px;
        }

        .command-search:hover {
            background: #fff;
            border-color: var(--border);
            box-shadow: var(--shadow);
        }

        .command-search kbd {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 5px;
            padding: 1px 6px;
            font-size: 11px;
            color: var(--text-light);
            margin-left: auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all .2s ease;
            white-space: nowrap;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
        }

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

        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: var(--shadow);
        }

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

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: 8px;
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: 12px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--dark);
            cursor: pointer;
            padding: 4px;
            border-radius: 8px;
        }

        .nav-toggle:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .article-hero {
            position: relative;
            padding: 88px 0 72px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(79, 70, 229, 0.78)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
        }

        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .article-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color .2s;
        }

        .article-hero .breadcrumb a:hover {
            color: #fff;
        }

        .article-hero .breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.4);
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.16);
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 30px;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .article-hero h1 {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.2;
            max-width: 800px;
            margin-bottom: 20px;
            color: #fff;
        }

        .hero-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            flex-wrap: wrap;
        }

        .hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-meta i {
            font-size: 13px;
            opacity: 0.7;
        }

        .article-section {
            padding: 64px 0;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 360px;
            gap: 40px;
            align-items: start;
        }

        .article-main {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 48px;
            box-shadow: var(--shadow);
        }

        .article-content {
            font-size: 1.0625rem;
            line-height: 1.9;
            color: #475569;
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2.5rem 0 1rem;
            color: var(--dark);
            padding-bottom: 0.6rem;
            border-bottom: 2px solid var(--primary-light);
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 2rem 0 0.75rem;
            color: var(--dark);
        }

        .article-content p {
            margin-bottom: 1.25rem;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(79, 70, 229, 0.35);
            transition: all .2s;
        }

        .article-content a:hover {
            color: var(--primary-dark);
            text-decoration-color: var(--primary-dark);
        }

        .article-content img {
            border-radius: 12px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }

        .article-content ul,
        .article-content ol {
            margin: 1rem 0 1.5rem 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
        }

        .article-content ul li {
            position: relative;
            padding-left: 4px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
            color: #475569;
        }

        .article-content code {
            background: #F1F5F9;
            border-radius: 5px;
            padding: 0.2em 0.4em;
            font-size: 0.9em;
            color: #0F172A;
        }

        .article-content pre {
            background: var(--dark);
            color: #E2E8F0;
            border-radius: 12px;
            padding: 1.25rem;
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        .article-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            font-size: 14px;
        }

        .article-tags .tag {
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 500;
            transition: all .2s;
        }

        .article-tags .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        .not-found {
            text-align: center;
            padding: 60px 20px;
        }

        .not-found i {
            font-size: 64px;
            color: var(--text-light);
            margin-bottom: 20px;
        }

        .not-found h2 {
            font-size: 28px;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-weak);
            margin-bottom: 32px;
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 28px;
            box-shadow: var(--shadow);
        }

        .sidebar-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 18px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border);
            position: relative;
        }

        .sidebar-card h3::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .info-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 0;
            font-size: 14px;
            border-bottom: 1px dashed var(--border);
        }

        .info-row:last-child {
            border-bottom: none;
        }

        .info-label {
            color: var(--text-weak);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .info-label i {
            font-size: 13px;
            color: var(--text-light);
        }

        .info-value {
            color: var(--dark);
            font-weight: 500;
            text-align: right;
            font-size: 13px;
        }

        .sidebar-tags {
            margin-top: 14px;
        }

        .sidebar-tags .info-label {
            margin-bottom: 10px;
        }

        .tag-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-wrap .tag {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 15px;
            transition: all .2s;
        }

        .tag-wrap .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        .sidebar-guide {
            position: relative;
            overflow: hidden;
            padding: 0;
            display: block;
            border: none;
        }

        .sidebar-guide img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .sidebar-guide:hover img {
            transform: scale(1.05);
        }

        .guide-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.25));
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 24px;
            color: #fff;
        }

        .guide-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(4px);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
            width: fit-content;
        }

        .guide-overlay h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            border: none;
            padding: 0;
            color: #fff;
        }

        .guide-overlay h3::after {
            display: none;
        }

        .guide-link {
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.9);
        }

        .sidebar-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-links li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--border);
            font-size: 14px;
        }

        .sidebar-links li:last-child {
            border-bottom: none;
        }

        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
            transition: all .2s;
        }

        .sidebar-links a:hover {
            color: var(--primary);
            padding-left: 8px;
        }

        .sidebar-links i {
            font-size: 10px;
            color: var(--text-light);
            transition: all .2s;
        }

        .sidebar-links a:hover i {
            color: var(--primary);
        }

        .steps-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #F8FAFC 0%, #EEF2FF 100%);
            box-shadow: inset 0 1px 0 var(--border), inset 0 -1px 0 var(--border);
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            padding: 6px 16px;
            border-radius: 30px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 800;
            color: var(--dark);
            line-height: 1.2;
            margin-bottom: 14px;
        }

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

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .step-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 40px 28px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all .3s ease;
            position: relative;
        }

        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.2);
        }

        .step-number {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 20px;
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.25);
        }

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

        .step-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin: 0;
        }

        .faq-section {
            padding: 80px 0;
            background: #fff;
        }

        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 0;
            transition: all .3s ease;
            overflow: hidden;
        }

        .faq-item.active {
            background: #fff;
            border-color: rgba(79, 70, 229, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            text-align: left;
            transition: all .2s;
        }

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

        .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            transition: all .3s;
        }

        .faq-item.active .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

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

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

        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
            border-top: 1px dashed var(--border);
            margin: 0;
            padding-top: 16px;
        }

        .cta-section {
            position: relative;
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(79, 70, 229, 0.82)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
        }

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

        .cta-section h2 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
            margin: 0 auto 36px;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .site-footer {
            background: var(--dark);
            color: #CBD5E1;
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-logo {
            color: #fff;
            margin-bottom: 16px;
            font-size: 20px;
        }

        .footer-brand .brand-logo i {
            background: linear-gradient(135deg, #4F46E5, #06B6D4);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
            max-width: 340px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col li {
            margin-bottom: 12px;
        }

        .footer-col a {
            font-size: 14px;
            color: #94A3B8;
            transition: all .2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 13px;
            color: #64748B;
            flex-wrap: wrap;
        }

        .footer-bottom a {
            color: #94A3B8;
        }

        .focus-visible:focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                position: static;
                grid-template-columns: repeat(3, 1fr);
                display: grid;
                align-items: start;
            }

            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                gap: 12px;
            }

            .command-search {
                display: none;
            }

            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 16px 32px rgba(15, 23, 42, 0.1);
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: all .3s ease;
                z-index: 99;
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav-link {
                padding: 12px 16px;
                font-size: 16px;
                border-radius: 10px;
            }

            .nav-link.active::after {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .header-actions .btn-sm {
                display: none;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
                margin: 0 auto;
            }

            .article-main {
                padding: 32px 24px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .faq-question {
                font-size: 14px;
                padding: 16px 20px;
            }

            .faq-answer p {
                padding: 14px 20px 16px;
            }

            .cta-btns {
                flex-direction: column;
                align-items: center;
            }

            .cta-btns .btn {
                width: 200px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                gap: 8px;
            }

            .brand-logo span {
                font-size: 15px;
            }

            .brand-logo i {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .article-hero {
                padding: 64px 0 48px;
            }

            .article-hero h1 {
                font-size: 24px;
            }

            .hero-meta {
                gap: 12px;
                font-size: 13px;
                flex-direction: column;
                align-items: flex-start;
            }

            .article-section {
                padding: 40px 0;
            }

            .article-main {
                padding: 24px 16px;
                border-radius: 12px;
            }

            .article-content {
                font-size: 1rem;
            }

            .steps-section,
            .faq-section,
            .cta-section {
                padding: 48px 0;
            }

            .section-head {
                margin-bottom: 36px;
            }

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

            .step-card {
                padding: 28px 20px;
            }

            .footer-grid {
                gap: 24px;
            }

            .footer-bottom {
                font-size: 12px;
            }
        }

/* roulang page: category1 */
:root {
        --brand-dark: #0A1F44;
        --brand: #12366D;
        --brand-light: #1E4B8F;
        --accent: #F7A928;
        --accent-dark: #E08E0B;
        --bg-light: #F6F8FC;
        --bg-white: #FFFFFF;
        --text-dark: #141B2D;
        --text-body: #3E4A5C;
        --text-muted: #7A8699;
        --border: #E6EAF0;
        --radius: 16px;
        --radius-sm: 10px;
        --shadow: 0 6px 30px rgba(10, 31, 68, 0.08);
        --shadow-lg: 0 16px 50px rgba(10, 31, 68, 0.14);
        --transition: all .25s ease;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        background: #FFFFFF;
        color: var(--text-body);
        -webkit-font-smoothing: antialiased;
        line-height: 1.6;
    }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text-dark); }
    a { text-decoration: none; }
    img { display: block; max-width: 100%; height: auto; }
    .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

    /* ============ Header ============ */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.86);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        height: 72px;
    }
    .brand-logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 800;
        color: var(--brand-dark);
        white-space: nowrap;
        transition: var(--transition);
    }
    .brand-logo i {
        width: 34px;
        height: 34px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, var(--brand), var(--brand-light));
        color: #fff;
        border-radius: 10px;
        font-size: 16px;
        transition: var(--transition);
    }
    .brand-logo:hover { color: var(--brand); }
    .brand-logo:hover i { transform: scale(1.06); }
    .main-nav { display: flex; gap: 8px; align-items: center; }
    .nav-link {
        padding: 8px 18px;
        border-radius: 10px;
        color: var(--text-body);
        font-weight: 500;
        font-size: 15px;
        transition: var(--transition);
        display: block;
    }
    .nav-link:hover { background: #F0F3F8; color: var(--brand); }
    .nav-link.active { background: #EAF0F8; color: var(--brand); font-weight: 600; }
    .header-actions { display: flex; align-items: center; gap: 12px; }
    .search-box {
        display: flex;
        align-items: center;
        gap: 8px;
        background: #F3F5F9;
        border: 1px solid var(--border);
        padding: 8px 14px;
        border-radius: 999px;
        width: 230px;
        transition: var(--transition);
    }
    .search-box:focus-within {
        background: #fff;
        border-color: var(--brand-light);
        box-shadow: 0 0 0 3px rgba(30, 75, 143, 0.12);
    }
    .search-box i { color: var(--text-muted); font-size: 14px; }
    .search-box input {
        background: transparent;
        border: none;
        outline: none;
        font-size: 14px;
        color: var(--text-dark);
        width: 100%;
    }
    .search-box input::placeholder { color: var(--text-muted); }
    .search-box kbd {
        font-size: 11px;
        background: #E8EBF0;
        padding: 2px 6px;
        border-radius: 6px;
        color: var(--text-muted);
        white-space: nowrap;
    }
    .mobile-toggle {
        display: none;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border: 1px solid var(--border);
        border-radius: 10px;
        background: #fff;
        color: var(--brand);
        font-size: 18px;
        cursor: pointer;
        transition: var(--transition);
    }
    .mobile-toggle:hover { background: #F0F3F8; }

    /* ============ Buttons ============ */
    .btn-primary, .btn-outline {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-weight: 600;
        padding: 12px 24px;
        border-radius: 12px;
        transition: var(--transition);
        text-decoration: none;
        border: 1px solid transparent;
        cursor: pointer;
        font-size: 15px;
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--brand) 0%, var(--brand-light) 100%);
        color: #fff;
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 28px rgba(18, 54, 109, 0.28);
    }
    .btn-primary:active { transform: translateY(0); box-shadow: none; }
    .btn-outline {
        background: transparent;
        border-color: rgba(255, 255, 255, 0.42);
        color: #fff;
    }
    .btn-outline:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; transform: translateY(-2px); }
    .btn-outline:active { transform: translateY(0); }
    .btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 10px; }
    .btn-light {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-weight: 600;
        padding: 12px 24px;
        border-radius: 12px;
        transition: var(--transition);
        background: #fff;
        color: var(--brand);
        border: 1px solid transparent;
    }
    .btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12); color: var(--brand-dark); }
    .btn-light:active { transform: translateY(0); }

    /* ============ Page Hero ============ */
    .page-hero {
        position: relative;
        background: linear-gradient(to right, rgba(10, 31, 68, 0.94), rgba(18, 54, 109, 0.84)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        color: #fff;
        padding: 108px 0 96px;
    }
    .page-hero::after {
        content: '';
        position: absolute;
        right: -80px;
        top: -80px;
        width: 320px;
        height: 320px;
        border-radius: 50%;
        background: rgba(247, 169, 40, 0.14);
        pointer-events: none;
    }
    .breadcrumb { font-size: 14px; color: rgba(255, 255, 255, 0.68); margin-bottom: 18px; display: flex; align-items: center; gap: 8px; }
    .breadcrumb a { color: rgba(255, 255, 255, 0.86); transition: var(--transition); }
    .breadcrumb a:hover { color: #fff; }
    .breadcrumb i { font-size: 11px; color: rgba(255, 255, 255, 0.5); }
    .page-hero h1 { font-size: 42px; font-weight: 800; color: #fff; line-height: 1.25; margin-bottom: 18px; max-width: 720px; }
    .page-hero .hero-desc { font-size: 16px; line-height: 1.75; color: rgba(255, 255, 255, 0.78); max-width: 640px; }
    .hero-search {
        display: flex;
        align-items: center;
        gap: 12px;
        max-width: 560px;
        margin-top: 32px;
        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.28);
        border-radius: 999px;
        padding: 12px 20px;
        backdrop-filter: blur(8px);
        transition: var(--transition);
    }
    .hero-search:focus-within { border-color: rgba(255, 255, 255, 0.6); background: rgba(255, 255, 255, 0.16); }
    .hero-search i { color: rgba(255, 255, 255, 0.85); }
    .hero-search input { background: transparent; border: none; outline: none; color: #fff; flex: 1; font-size: 15px; }
    .hero-search input::placeholder { color: rgba(255, 255, 255, 0.72); }
    .hero-stats { display: flex; gap: 48px; margin-top: 44px; flex-wrap: wrap; }
    .hero-stats div { display: flex; flex-direction: column; }
    .hero-stats strong { display: block; font-size: 32px; font-weight: 800; color: #fff; line-height: 1.2; }
    .hero-stats span { color: rgba(255, 255, 255, 0.7); font-size: 14px; margin-top: 4px; }

    /* ============ Section ============ */
    .section { padding: 100px 0; }
    .section-gray { background: var(--bg-light); }
    .section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
    .section-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: #EAF0F8;
        color: var(--brand);
        font-size: 13px;
        font-weight: 600;
        padding: 6px 14px;
        border-radius: 999px;
        margin-bottom: 14px;
        letter-spacing: .02em;
    }
    .section-head h2 { font-size: 36px; color: var(--text-dark); margin-bottom: 14px; font-weight: 800; }
    .section-head p { color: var(--text-muted); font-size: 16px; line-height: 1.7; }

    /* ============ Two Col ============ */
    .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
    .text-col h2 { font-size: 32px; font-weight: 800; color: var(--text-dark); margin-bottom: 18px; line-height: 1.35; }
    .text-col > p { color: var(--text-body); line-height: 1.8; font-size: 15px; margin-bottom: 26px; }
    .check-list { list-style: none; margin: 0; padding: 0; }
    .check-list li { position: relative; padding-left: 32px; margin-bottom: 14px; color: var(--text-body); line-height: 1.65; font-size: 15px; }
    .check-list li::before {
        content: '';
        position: absolute;
        left: 0;
        top: 3px;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: #E4F2EC;
    }
    .check-list li::after {
        content: '✓';
        position: absolute;
        left: 5px;
        top: 1px;
        color: #1B8A5E;
        font-size: 13px;
        font-weight: 700;
    }
    .image-col { position: relative; }
    .image-col img { border-radius: 20px; box-shadow: var(--shadow-lg); width: 100%; object-fit: cover; }
    .float-card {
        position: absolute;
        bottom: 24px;
        left: -24px;
        background: #fff;
        border-radius: 16px;
        padding: 16px 22px;
        box-shadow: var(--shadow-lg);
        display: flex;
        align-items: center;
        gap: 12px;
        max-width: 260px;
    }
    .float-card i {
        width: 42px;
        height: 42px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--accent), var(--accent-light));
        font-size: 18px;
        color: #fff;
        flex-shrink: 0;
    }
    .float-card strong { display: block; font-size: 15px; color: var(--text-dark); margin-bottom: 2px; }
    .float-card span { font-size: 13px; color: var(--text-muted); }

    /* ============ Steps ============ */
    .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .step-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 32px 26px;
        position: relative;
        transition: var(--transition);
    }
    .step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
    .step-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        border-radius: 8px 8px 0 0;
        background: linear-gradient(to right, var(--brand), var(--accent));
        opacity: 0;
        transition: var(--transition);
    }
    .step-card:hover::before { opacity: 1; }
    .step-num { font-size: 48px; font-weight: 800; color: #E8ECF3; line-height: 1; margin-bottom: 16px; font-style: italic; }
    .step-card h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
    .step-card p { color: var(--text-muted); font-size: 14px; line-height: 1.65; margin: 0; }

    /* ============ Features ============ */
    .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .feature-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 32px 28px;
        transition: var(--transition);
    }
    .feature-card:hover { border-color: transparent; box-shadow: var(--shadow-lg); transform: translateY(-4px); }
    .feature-icon {
        width: 52px;
        height: 52px;
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        margin-bottom: 18px;
        background: linear-gradient(135deg, rgba(18, 54, 109, 0.08), rgba(247, 169, 40, 0.16));
        color: var(--brand);
    }
    .feature-card h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
    .feature-card p { color: var(--text-muted); font-size: 14px; line-height: 1.7; margin: 0; }

    /* ============ Article / News ============ */
    .article-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .article-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }
    .article-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
    .article-card .thumb { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #E8EDF4; }
    .article-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
    .article-card:hover .thumb img { transform: scale(1.06); }
    .article-tag {
        position: absolute;
        top: 12px;
        left: 12px;
        background: rgba(10, 31, 68, 0.82);
        color: #fff;
        font-size: 12px;
        font-weight: 600;
        padding: 4px 12px;
        border-radius: 999px;
        backdrop-filter: blur(4px);
    }
    .article-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
    .article-body h3 { font-size: 16px; font-weight: 700; color: var(--text-dark); line-height: 1.5; margin-bottom: 8px; }
    .article-body p { color: var(--text-muted); font-size: 14px; line-height: 1.65; flex: 1; margin: 0; }
    .article-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-top: 16px;
        color: var(--text-muted);
        font-size: 13px;
    }
    .read-more {
        color: var(--brand);
        font-size: 13px;
        font-weight: 600;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        margin-left: auto;
        transition: var(--transition);
    }
    .read-more:hover { gap: 10px; color: var(--accent-dark); }

    /* ============ Stats ============ */
    .stats-section {
        padding: 96px 0;
        background: linear-gradient(135deg, rgba(10, 31, 68, 0.94), rgba(18, 54, 109, 0.88)), url('/assets/images/backpic/back-3.png') center/cover;
        color: #fff;
        position: relative;
    }
    .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
    .stat-item strong { font-size: 44px; font-weight: 800; color: #fff; display: block; margin-bottom: 8px; letter-spacing: -0.02em; }
    .stat-item span { color: rgba(255, 255, 255, 0.72); font-size: 15px; }

    /* ============ FAQ ============ */
    .faq-wrap { max-width: 860px; margin: 0 auto; }
    .faq-item {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        margin-bottom: 14px;
        box-shadow: 0 2px 8px rgba(10, 31, 68, 0.03);
        transition: var(--transition);
    }
    .faq-item:hover { border-color: #D6DFE8; }
    .faq-item summary {
        list-style: none;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 24px;
        font-weight: 600;
        color: var(--text-dark);
        font-size: 15px;
        transition: var(--transition);
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: '+'; font-size: 22px; font-weight: 400; color: var(--brand); transition: transform .3s ease; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item[open] { box-shadow: var(--shadow); border-color: #D1DCE8; }
    .faq-item .faq-answer { padding: 0 24px 22px; color: var(--text-body); line-height: 1.75; font-size: 14px; }

    /* ============ CTA ============ */
    .cta-wrap { padding: 0 0 100px; }
    .cta-section {
        background: linear-gradient(120deg, #0E2B5C, #1E4B8F);
        border-radius: 28px;
        padding: 72px 40px;
        text-align: center;
        position: relative;
        overflow: hidden;
        color: #fff;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        width: 320px;
        height: 320px;
        border-radius: 50%;
        background: rgba(247, 169, 40, 0.2);
        top: -120px;
        right: -80px;
    }
    .cta-section::after {
        content: '';
        position: absolute;
        width: 260px;
        height: 260px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.05);
        bottom: -100px;
        left: -60px;
    }
    .cta-section > * { position: relative; z-index: 1; }
    .cta-section h2 { font-size: 34px; font-weight: 800; margin-bottom: 14px; color: #fff; }
    .cta-section p { color: rgba(255, 255, 255, 0.78); max-width: 600px; margin: 0 auto 30px; font-size: 16px; line-height: 1.7; }
    .cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

    /* ============ Footer ============ */
    .site-footer {
        background: #0A1F44;
        color: rgba(255, 255, 255, 0.78);
        padding: 64px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 48px;
        padding-bottom: 48px;
    }
    .footer-brand .brand-logo { color: #fff; }
    .footer-brand .brand-logo i { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); }
    .footer-brand p { margin: 16px 0 0; font-size: 14px; line-height: 1.75; color: rgba(255, 255, 255, 0.6); max-width: 340px; }
    .footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
    .footer-col ul { list-style: none; margin: 0; padding: 0; }
    .footer-col li { margin-bottom: 10px; }
    .footer-col a { color: rgba(255, 255, 255, 0.68); text-decoration: none; font-size: 14px; transition: var(--transition); }
    .footer-col a:hover { color: #fff; }
    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 0;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        font-size: 14px;
        color: rgba(255, 255, 255, 0.45);
        flex-wrap: wrap;
        gap: 10px;
    }
    .footer-bottom a { color: rgba(255, 255, 255, 0.6); text-decoration: none; transition: var(--transition); }
    .footer-bottom a:hover { color: #fff; }

    /* ============ Focus / Accessibility ============ */
    a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
        outline: 3px solid rgba(247, 169, 40, 0.5);
        outline-offset: 2px;
        border-radius: 4px;
    }

    /* ============ Responsive ============ */
    @media (max-width: 1024px) {
        .container { padding: 0 20px; }
        .search-box { width: 190px; }
        .steps-grid, .features-grid { grid-template-columns: repeat(2, 1fr); }
        .article-grid { grid-template-columns: repeat(2, 1fr); }
        .stats-grid { gap: 24px; }
        .float-card { left: 12px; }
    }

    @media (max-width: 768px) {
        .header-inner { height: 64px; }
        .mobile-toggle { display: flex; }
        .header-actions .search-box { display: none; }
        .main-nav {
            position: absolute;
            top: 64px;
            left: 16px;
            right: 16px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: var(--shadow-lg);
            flex-direction: column;
            padding: 12px;
            gap: 4px;
            display: none;
            z-index: 50;
        }
        .main-nav.open { display: flex; }
        .nav-link { width: 100%; padding: 12px 16px; }
        .page-hero { padding: 80px 0 72px; }
        .page-hero h1 { font-size: 32px; }
        .hero-stats { gap: 28px; margin-top: 32px; }
        .hero-stats strong { font-size: 26px; }
        .section { padding: 72px 0; }
        .section-head { margin-bottom: 40px; }
        .section-head h2 { font-size: 28px; }
        .two-col { grid-template-columns: 1fr; gap: 40px; }
        .float-card { left: 8px; bottom: 16px; padding: 12px 16px; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
        .stats-section { padding: 72px 0; }
        .stat-item strong { font-size: 34px; }
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        .footer-brand { grid-column: 1 / -1; }
        .cta-section { padding: 56px 24px; }
        .cta-section h2 { font-size: 28px; }
    }

    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .header-actions .btn-sm { display: none; }
        .steps-grid, .features-grid, .article-grid { grid-template-columns: 1fr; }
        .stats-grid { grid-template-columns: 1fr; }
        .page-hero h1 { font-size: 27px; }
        .hero-desc { font-size: 15px; }
        .hero-search { padding: 10px 16px; }
        .hero-stats { gap: 20px; }
        .hero-stats strong { font-size: 22px; }
        .section { padding: 56px 0; }
        .section-head h2 { font-size: 24px; }
        .two-col { gap: 28px; }
        .footer-grid { grid-template-columns: 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .cta-section { padding: 44px 20px; border-radius: 20px; }
        .cta-actions .btn-primary, .cta-actions .btn-outline { width: 100%; }
        .article-body h3 { font-size: 15px; }
        .read-more { margin-left: 0; }
        .article-meta { justify-content: space-between; flex-wrap: wrap; }
    }