/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #06b6d4;
            --accent: #f59e0b;
            --ink: #0f172a;
            --ink-soft: #334155;
            --ink-mute: #64748b;
            --paper: #f8fafc;
            --white: #ffffff;
            --border: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 12px rgba(15, 23, 42, .06);
            --shadow: 0 4px 24px rgba(15, 23, 42, .08);
            --shadow-lg: 0 12px 48px rgba(15, 23, 42, .12);
            --transition: all .35s cubic-bezier(.4, 0, .2, 1);
        }

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

        html {
            font-size: 16px;
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: var(--paper);
            color: var(--ink);
            line-height: 1.7;
            overflow-x: hidden;
        }

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

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .section {
            padding: 88px 0;
        }

        .section-sm {
            padding: 56px 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .06em;
            padding: 6px 16px;
            border-radius: 999px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--ink);
            letter-spacing: -0.02em;
            margin-top: 16px;
        }

        .section-desc {
            font-size: 17px;
            color: var(--ink-mute);
            max-width: 640px;
            margin-top: 12px;
            line-height: 1.75;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 12px;
            transition: var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
            line-height: 1.2;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, .28);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, .35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, .25);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .7);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: var(--white);
            color: var(--primary);
            border-color: var(--white);
            box-shadow: 0 4px 16px rgba(15, 23, 42, .08);
        }

        .btn-outline-light:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(15, 23, 42, .12);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 16px;
            border-radius: 14px;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .4);
            outline-offset: 3px;
        }

        .card {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
            border-color: #cbd5e1;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 20px rgba(15, 23, 42, .04);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
        }

        .logo-text {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--ink);
            letter-spacing: -0.01em;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
        }

        .brand-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .header-cta {
            padding: 10px 22px;
            font-size: 14px;
            border-radius: 10px;
        }

        .channel-nav-wrap {
            border-top: 1px solid var(--border);
            background: rgba(248, 250, 252, .6);
        }

        .channel-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding: 0;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

        .channel-nav::-webkit-scrollbar {
            display: none;
        }

        .channel-nav a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-mute);
            padding: 14px 18px;
            white-space: nowrap;
            border-bottom: 3px solid transparent;
            transition: var(--transition);
            position: relative;
        }

        .channel-nav a i {
            font-size: 13px;
            opacity: .8;
        }

        .channel-nav a:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, .05);
        }

        .channel-nav a.active {
            color: var(--primary);
            font-weight: 600;
            border-bottom-color: var(--primary);
            background: rgba(37, 99, 235, .04);
        }

        .mobile-menu-btn {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--paper);
            border: 1px solid var(--border);
            color: var(--ink);
            font-size: 18px;
            align-items: center;
            justify-content: center;
        }

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

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 120px 0 100px;
            background: url('/assets/images/backpic/back-1.png') center center/cover no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(15, 23, 42, .88) 0%, rgba(15, 23, 42, .75) 40%, rgba(15, 23, 42, .35) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .2);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 999px;
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }

        .hero-badge i {
            color: var(--accent);
        }

        .hero h1 {
            font-size: 56px;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .hero h1 span {
            background: linear-gradient(120deg, #60a5fa, #22d3ee);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 20px;
            font-weight: 600;
            color: rgba(255, 255, 255, .92);
            margin-bottom: 16px;
        }

        .hero-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, .72);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 560px;
        }

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

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, .15);
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat .num {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stat .num i {
            font-size: 20px;
            color: var(--accent);
            margin-right: 4px;
        }

        .hero-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, .6);
            margin-top: 6px;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            padding: 40px 32px;
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 80px;
            height: 80px;
            border-radius: 0 0 0 100%;
            background: var(--primary-light);
            opacity: .35;
            transition: var(--transition);
        }

        .feature-card:hover::after {
            width: 120px;
            height: 120px;
            opacity: .5;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
        }

        .feature-icon.blue {
            background: var(--primary-light);
            color: var(--primary);
        }

        .feature-icon.cyan {
            background: #cffafe;
            color: #0891b2;
        }

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

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 12px;
            position: relative;
            z-index: 2;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--ink-mute);
            line-height: 1.7;
            position: relative;
            z-index: 2;
        }

        /* ===== Categories ===== */
        .categories-section {
            background: var(--ink-900);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .categories-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, .9);
        }

        .categories-section .container {
            position: relative;
            z-index: 2;
        }

        .categories-section .section-title {
            color: #fff;
        }

        .categories-section .section-desc {
            color: rgba(255, 255, 255, .65);
        }

        .categories-section .section-label {
            background: rgba(255, 255, 255, .12);
            color: #93c5fd;
        }

        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 48px;
        }

        .category-card {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            backdrop-filter: blur(10px);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .category-card:hover {
            background: rgba(255, 255, 255, .1);
            border-color: rgba(255, 255, 255, .25);
            transform: translateY(-6px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, .3);
        }

        .category-card .cat-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(59, 130, 246, .25);
            color: #93c5fd;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
        }

        .category-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .category-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .category-card a.arrow-link {
            color: #93c5fd;
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .category-card a.arrow-link:hover {
            gap: 12px;
            color: #fff;
        }

        /* ===== News List ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 1.4fr;
            gap: 28px;
            margin-top: 48px;
        }

        .news-featured {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 320px;
            background: var(--ink-900);
        }

        .news-featured img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: .55;
            transition: var(--transition);
        }

        .news-featured:hover img {
            transform: scale(1.04);
            opacity: .45;
        }

        .news-featured .news-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 23, 42, .95) 0%, rgba(15, 23, 42, .3) 60%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 32px;
        }

        .news-featured .news-cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(245, 158, 11, .15);
            padding: 4px 12px;
            border-radius: 999px;
            display: inline-block;
            width: fit-content;
            margin-bottom: 12px;
        }

        .news-featured .news-title {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .news-featured .news-title:hover {
            color: #93c5fd;
        }

        .news-featured .news-meta {
            font-size: 13px;
            color: rgba(255, 255, 255, .6);
        }

        .news-list-container {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 20px 24px;
            transition: var(--transition);
        }

        .news-item:hover {
            box-shadow: var(--shadow);
            border-color: #cbd5e1;
            transform: translateX(4px);
        }

        .news-item .news-index {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary-light);
            min-width: 36px;
        }

        .news-item .news-body {
            flex: 1;
        }

        .news-item .news-item-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.5;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item .news-item-title:hover {
            color: var(--primary);
        }

        .news-item .news-item-meta {
            font-size: 12px;
            color: var(--ink-mute);
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .news-item .news-item-meta .cat-badge {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 11px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 999px;
        }

        .news-empty {
            background: var(--white);
            border: 1px dashed var(--border);
            border-radius: var(--radius-md);
            padding: 40px;
            text-align: center;
            color: var(--ink-mute);
        }

        /* ===== Process ===== */
        .process-section {
            background: var(--white);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 56px;
            counter-reset: step;
        }

        .process-step {
            text-align: center;
            position: relative;
            padding: 0 12px;
        }

        .process-step::after {
            content: '';
            position: absolute;
            top: 36px;
            right: -14px;
            width: 28px;
            height: 2px;
            background: linear-gradient(90deg, var(--border), transparent);
        }

        .process-step:last-child::after {
            display: none;
        }

        .step-num {
            width: 72px;
            height: 72px;
            margin: 0 auto 24px;
            border-radius: 20px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 24px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(37, 99, 235, .25);
            transition: var(--transition);
        }

        .process-step:hover .step-num {
            transform: scale(1.08) rotate(-4deg);
            box-shadow: 0 12px 32px rgba(37, 99, 235, .35);
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 14px;
            color: var(--ink-mute);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 48px auto 0;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            transition: var(--transition);
            overflow: hidden;
        }

        .faq-item:hover {
            border-color: #cbd5e1;
            box-shadow: var(--shadow-sm);
        }

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 8px 32px rgba(37, 99, 235, .1);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 28px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            user-select: none;
        }

        .faq-question i {
            color: var(--ink-mute);
            font-size: 14px;
            transition: var(--transition);
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--paper);
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 320px;
        }

        .faq-answer-inner {
            padding: 0 28px 24px;
            font-size: 14px;
            color: var(--ink-mute);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background: url('/assets/images/backpic/back-3.png') center center/cover no-repeat;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(37, 99, 235, .92), rgba(6, 182, 212, .85));
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 40px;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 17px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 36px;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--ink-900);
            color: rgba(255, 255, 255, .7);
            padding: 72px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 56px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .footer-logo .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: .02em;
        }

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

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

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-col ul li a:hover {
            color: var(--primary-400);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .5);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 72px 0;
            }

            .hero {
                padding: 100px 0 80px;
            }

            .hero h1 {
                font-size: 44px;
            }

            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }

            .process-step::after {
                display: none;
            }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }

            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 28px;
            }

            .brand-actions .header-cta {
                display: none;
            }

            .mobile-menu-btn {
                display: flex;
            }

            .channel-nav {
                padding: 0;
                background: var(--white);
            }

            .channel-nav a {
                padding: 12px 14px;
                font-size: 14px;
            }

            .hero {
                padding: 80px 0 60px;
            }

            .hero h1 {
                font-size: 34px;
            }

            .hero-sub {
                font-size: 18px;
            }

            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
                margin-top: 40px;
                padding-top: 30px;
            }

            .hero-stat .num {
                font-size: 24px;
            }

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

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

            .news-item {
                padding: 16px;
                gap: 14px;
            }

            .news-item .news-index {
                font-size: 18px;
                min-width: 28px;
            }

            .cta-content h2 {
                font-size: 30px;
            }

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

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

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

            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .hero {
                padding: 60px 0 48px;
            }

            .hero h1 {
                font-size: 28px;
            }

            .hero-desc {
                font-size: 14px;
            }

            .hero-btns .btn {
                width: 100%;
                padding: 13px 24px;
            }

            .hero-stats {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .hero-stat .num {
                font-size: 22px;
            }

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

            .faq-question {
                padding: 18px 20px;
                font-size: 15px;
            }

            .faq-answer-inner {
                padding: 0 20px 20px;
            }

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

            .cta-content h2 {
                font-size: 26px;
            }

            .news-featured {
                min-height: 240px;
            }

            .news-featured .news-overlay {
                padding: 20px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-up {
            animation: fadeInUp .8s ease-out both;
        }

        .delay-1 {
            animation-delay: .1s;
        }

        .delay-2 {
            animation-delay: .2s;
        }

        .delay-3 {
            animation-delay: .3s;
        }

        /* ===== Misc ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }

        .badge-blue {
            background: var(--primary-light);
            color: var(--primary);
        }

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

        .divider {
            border: none;
            border-top: 1px solid var(--border);
            margin: 0;
        }

        .text-gradient {
            background: linear-gradient(120deg, #60a5fa, #22d3ee);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

/* roulang page: category1 */
:root {
            --primary: #4f46e5;
            --primary-dark: #4338ca;
            --primary-light: #6366f1;
            --accent: #0ea5e9;
            --accent-dark: #0284c7;
            --dark-bg: #0f172a;
            --dark-bg-2: #1e293b;
            --text-dark: #1e293b;
            --text-body: #475569;
            --text-light: #94a3b8;
            --bg-light: #f8fafc;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: #ffffff;
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

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

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 24px;
            max-width: 1280px;
            margin: 0 auto;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.02em;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            border-radius: 12px;
            font-size: 1.1rem;
            box-shadow: 0 4px 14px rgba(79,70,229,0.35);
        }

        .brand-tagline {
            font-size: 0.8rem;
            color: var(--text-light);
            font-weight: 400;
            letter-spacing: 0.02em;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .header-link {
            font-size: 0.9rem;
            color: var(--text-body);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .header-link:hover {
            color: var(--primary);
        }

        .channel-nav-wrap {
            border-top: 1px solid var(--border);
            background: rgba(255,255,255,0.85);
        }

        .channel-nav {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .channel-nav::-webkit-scrollbar {
            display: none;
        }

        .channel-nav a {
            padding: 14px 20px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            border-bottom: 2px solid transparent;
            transition: all 0.3s ease;
        }

        .channel-nav a:hover {
            color: var(--primary);
            background: rgba(79,70,229,0.04);
        }

        .channel-nav a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }

        /* Mobile Nav */
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 8px;
        }

        @media (max-width: 768px) {
            .brand-tagline,
            .header-link {
                display: none;
            }
            .mobile-nav-toggle {
                display: block;
            }
            .channel-nav {
                padding: 0 12px;
            }
            .channel-nav a {
                padding: 12px 14px;
                font-size: 0.85rem;
            }
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding: 80px 0 100px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #312e81 100%);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(99,102,241,0.35) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 100px;
            color: #e2e8f0;
            font-size: 0.85rem;
            backdrop-filter: blur(8px);
            margin-bottom: 20px;
        }

        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            max-width: 700px;
        }

        .page-hero p.lead {
            font-size: 1.1rem;
            color: #cbd5e1;
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: 12px;
            font-size: 0.95rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn i {
            font-size: 0.9rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(79,70,229,0.4);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(79,70,229,0.5);
        }

        .btn-outline-light {
            background: rgba(255,255,255,0.08);
            color: #e2e8f0;
            border: 1px solid rgba(255,255,255,0.3);
            backdrop-filter: blur(8px);
        }

        .btn-outline-light:hover {
            background: rgba(255,255,255,0.18);
            transform: translateY(-3px);
        }

        /* Section */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: var(--bg-light);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px;
        }

        .section-head .tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(79,70,229,0.08);
            border-radius: 100px;
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .section-head h2 {
            font-size: 2.1rem;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .section-head p {
            color: var(--text-light);
            font-size: 1rem;
            line-height: 1.8;
        }

        /* Cards */
        .card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all 0.4s ease;
        }

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

        .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .card-body {
            padding: 28px;
        }

        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .card-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 600;
            margin-top: 16px;
        }

        .card-link:hover {
            gap: 12px;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.3s;
        }

        .feature-item:hover::before {
            opacity: 1;
        }

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

        .feature-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            font-size: 1.4rem;
            background: linear-gradient(135deg, rgba(79,70,229,0.1), rgba(14,165,233,0.1));
            color: var(--primary);
            margin-bottom: 18px;
        }

        .feature-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .feature-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* Steps */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            text-align: center;
            padding: 36px 20px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            position: relative;
            transition: all 0.3s ease;
        }

        .step-card:hover {
            box-shadow: var(--shadow);
        }

        .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
        }

        .step-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding: 48px 40px;
            background: linear-gradient(135deg, var(--dark-bg), #1e1b4b);
            border-radius: var(--radius-lg);
        }

        .stat-item {
            text-align: center;
            padding: 20px;
        }

        .stat-item .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-item .label {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
        }

        /* FAQ */
        .faq-list {
            max-width: 850px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 14px;
            background: #fff;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(79,70,229,0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            padding: 22px 28px;
            font-weight: 600;
            color: var(--text-dark);
            font-size: 1rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item .faq-body {
            padding: 0 28px 22px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.8;
        }

        /* CTA */
        .cta-section {
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-box {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
        }

        .cta-box h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-box p {
            color: rgba(255,255,255,0.85);
            margin-bottom: 30px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta {
            background: #fff;
            color: var(--primary);
            padding: 14px 34px;
        }

        .btn-cta:hover {
            background: #f1f5f9;
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
        }

        /* Footer */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand .logo-icon {
            width: 36px;
            height: 36px;
            font-size: 0.95rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 400px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

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

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-col ul a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .page-hero {
                padding: 60px 0 80px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                padding: 32px 20px;
            }
            .brand-row {
                padding: 12px 16px;
            }
            .site-logo {
                font-size: 1.2rem;
            }
        }

        /* Focus states */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(79,70,229,0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Additional utility */
        .glass-card {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.12);
            backdrop-filter: blur(12px);
            border-radius: var(--radius);
            padding: 28px;
            transition: all 0.3s ease;
        }

        .glass-card:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.2);
        }

/* roulang page: article */
:root {
            --primary: #2456e6;
            --primary-dark: #173db3;
            --primary-light: #e8effd;
            --accent: #07b6d5;
            --warm: #f5a623;
            --dark: #0f1e3c;
            --body-bg: #f6f8fc;
            --surface: #ffffff;
            --text: #152a4a;
            --muted: #60758f;
            --border: #e3eaf3;
            --radius: 14px;
            --radius-sm: 10px;
            --shadow: 0 6px 30px rgba(23, 61, 179, .08);
            --shadow-hover: 0 14px 40px rgba(23, 61, 179, .14);
            --spacing: 24px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--body-bg);
            color: var(--text);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
        }

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

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

        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 2px 16px rgba(23, 61, 179, .04);
        }

        .brand-bar {
            border-bottom: 1px solid var(--border);
        }

        .brand-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            padding-bottom: 14px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: .5px;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            box-shadow: 0 6px 18px rgba(36, 86, 230, .28);
        }

        .header-search form {
            display: flex;
            align-items: center;
            background: var(--body-bg);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 4px 4px 4px 16px;
            transition: border-color .2s, box-shadow .2s;
        }

        .header-search form:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(36, 86, 230, .12);
            background: #fff;
        }

        .header-search input {
            border: none;
            background: transparent;
            padding: 8px 10px;
            outline: none;
            width: 220px;
            font-size: .875rem;
            color: var(--text);
        }

        .header-search input::placeholder {
            color: #a3b3c9;
        }

        .header-search button {
            background: var(--primary);
            border: none;
            color: #fff;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            cursor: pointer;
            transition: background .2s, transform .2s;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .header-search button:hover {
            background: var(--primary-dark);
            transform: scale(1.05);
        }

        .channel-nav {
            background: #fff;
        }

        .channel-nav .container {
            display: flex;
            gap: 6px;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .channel-nav .container::-webkit-scrollbar {
            display: none;
        }

        .channel-nav a {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 13px 18px;
            font-weight: 600;
            font-size: .925rem;
            color: var(--muted);
            border-bottom: 3px solid transparent;
            text-decoration: none;
            white-space: nowrap;
            transition: color .2s, border-color .2s, background .2s;
        }

        .channel-nav a:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(36, 86, 230, .04);
        }

        .channel-nav a.active {
            color: var(--primary);
            border-color: var(--primary);
            background: var(--primary-light);
            border-radius: 0 0 10px 10px;
        }

        .channel-nav a i {
            font-size: .8rem;
        }

        .page-banner {
            background-size: cover;
            background-position: center;
            padding: 70px 0 52px;
            position: relative;
            color: #fff;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(15, 30, 60, .86) 10%, rgba(15, 30, 60, .6) 55%, rgba(15, 30, 60, .4) 100%);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: .85rem;
            margin-bottom: 18px;
            color: rgba(255, 255, 255, .75);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, .75);
            text-decoration: none;
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .category-badge {
            display: inline-block;
            background: var(--warm);
            color: #fff;
            padding: 7px 16px;
            border-radius: 40px;
            font-size: .78rem;
            font-weight: 700;
            letter-spacing: 1px;
            box-shadow: 0 6px 16px rgba(245, 166, 35, .3);
        }

        .article-section {
            padding: 55px 0 30px;
        }

        .article-main-grid {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 30px;
        }

        .article-card {
            background: var(--surface);
            border-radius: 18px;
            padding: 38px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .article-header h1 {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 14px;
            color: var(--dark);
            letter-spacing: -.5px;
        }

        .article-desc {
            font-size: 1.05rem;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
            font-size: .85rem;
            color: var(--muted);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-meta i {
            color: var(--primary);
        }

        .article-cover {
            margin-top: 26px;
        }

        .article-cover img {
            width: 100%;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }

        .reading-tip {
            margin-top: 24px;
            background: var(--primary-light);
            border: 1px solid rgba(36, 86, 230, .12);
            border-radius: 12px;
            padding: 12px 18px;
            font-size: .85rem;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .reading-tip i {
            font-size: 1rem;
        }

        .article-content {
            font-size: 1.06rem;
            line-height: 1.9;
            color: #1f3350;
            margin-top: 28px;
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--dark);
            margin-bottom: .8em;
            font-weight: 700;
        }

        .article-content h2 {
            font-size: 1.5rem;
            margin-top: 2.2em;
            padding-bottom: .5em;
            border-bottom: 1px solid var(--border);
        }

        .article-content h3 {
            font-size: 1.25rem;
            margin-top: 1.8em;
        }

        .article-content h4 {
            font-size: 1.1rem;
            margin-top: 1.5em;
        }

        .article-content p {
            margin-bottom: 1.3em;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color .2s;
        }

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

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.3em 1.4em;
        }

        .article-content li {
            margin-bottom: .45em;
        }

        .article-content img {
            width: auto;
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 1.6em 0;
            box-shadow: var(--shadow);
        }

        .article-content blockquote {
            margin: 1.8em 0;
            padding: 18px 20px;
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: 0 12px 12px 0;
            color: #1f3350;
            font-style: italic;
        }

        .article-content code {
            background: #eef2fa;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: .9em;
            color: var(--primary-dark);
            font-family: 'SFMono-Regular', Consolas, monospace;
        }

        .article-content pre {
            background: var(--dark);
            color: #e5eaf3;
            padding: 20px;
            border-radius: 12px;
            overflow-x: auto;
            margin-bottom: 1.3em;
            line-height: 1.7;
        }

        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 0 0 1.5em;
            font-size: .95rem;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 10px 12px;
            text-align: left;
        }

        .article-content th {
            background: var(--primary-light);
            font-weight: 600;
        }

        .article-content hr {
            margin: 2em 0;
            border: none;
            border-top: 1px solid var(--border);
        }

        .article-footer {
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 9px;
        }

        .tag-pill {
            background: var(--body-bg);
            border: 1px solid var(--border);
            color: var(--muted);
            padding: 6px 13px;
            border-radius: 30px;
            font-size: .78rem;
            text-decoration: none;
            transition: all .2s;
        }

        .tag-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }

        .article-share {
            display: flex;
            gap: 10px;
        }

        .article-share a {
            color: var(--muted);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all .2s;
            text-decoration: none;
            font-size: .85rem;
        }

        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .sidebar-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .sidebar-title {
            font-size: 1.05rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-light);
            color: var(--dark);
        }

        .sidebar-title i {
            color: var(--primary);
        }

        .sidebar-about img {
            width: 100%;
            border-radius: 10px;
            margin-bottom: 15px;
        }

        .sidebar-about p {
            font-size: .9rem;
            color: var(--muted);
            line-height: 1.75;
        }

        .sidebar-list {
            list-style: none;
        }

        .sidebar-list li {
            border-bottom: 1px dashed var(--border);
            padding: 11px 0;
        }

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

        .sidebar-list li a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-decoration: none;
            color: var(--text);
            font-size: .9rem;
            transition: color .2s;
            gap: 8px;
        }

        .sidebar-list li a:hover {
            color: var(--primary);
        }

        .sidebar-list .rank {
            font-weight: 800;
            color: var(--primary);
            opacity: .35;
            margin-right: 6px;
        }

        .sidebar-list .hot-label {
            background: var(--warm);
            color: #fff;
            border-radius: 30px;
            padding: 3px 9px;
            font-size: .65rem;
            flex-shrink: 0;
            letter-spacing: .5px;
        }

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

        .tag-cloud a {
            background: var(--body-bg);
            border: 1px solid var(--border);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: .8rem;
            color: var(--muted);
            text-decoration: none;
            transition: all .2s;
        }

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

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            border: none;
        }

        .sidebar-cta h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .sidebar-cta p {
            font-size: .85rem;
            opacity: .85;
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .sidebar-cta .btn-light {
            display: inline-block;
            background: #fff;
            color: var(--primary-dark);
            padding: 10px 20px;
            border-radius: 30px;
            font-size: .85rem;
            font-weight: 600;
            text-decoration: none;
            transition: transform .2s, box-shadow .2s;
        }

        .sidebar-cta .btn-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 24px rgba(0, 0, 0, .16);
        }

        .related-section {
            padding: 55px 0 30px;
        }

        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 28px;
        }

        .section-head h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -.3px;
        }

        .section-head h2 span {
            color: var(--primary);
        }

        .section-head .btn-more {
            color: var(--primary);
            text-decoration: none;
            font-size: .9rem;
            font-weight: 600;
            transition: gap .2s;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .section-head .btn-more:hover {
            gap: 10px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .related-card {
            background: #fff;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            text-decoration: none;
            color: var(--text);
            transition: all .25s;
            display: block;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .related-card .related-thumb {
            height: 130px;
            overflow: hidden;
            position: relative;
        }

        .related-card .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }

        .related-card:hover .related-thumb img {
            transform: scale(1.06);
        }

        .related-body {
            padding: 16px;
        }

        .related-body .category-badge-sm {
            font-size: .68rem;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 9px;
            border-radius: 30px;
            font-weight: 600;
        }

        .related-body h3 {
            font-size: .98rem;
            font-weight: 600;
            margin-top: 10px;
            line-height: 1.55;
            color: var(--dark);
            transition: color .2s;
        }

        .related-card:hover .related-body h3 {
            color: var(--primary);
        }

        .related-body .related-meta {
            font-size: .75rem;
            color: var(--muted);
            margin-top: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .cta-section {
            padding: 45px 0 70px;
        }

        .cta-box {
            border-radius: 22px;
            padding: 52px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            color: #fff;
            background-size: cover;
            background-position: center;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 30, 60, .88) 20%, rgba(36, 86, 230, .78) 100%);
        }

        .cta-box h2 {
            font-size: 1.85rem;
            font-weight: 800;
            margin-bottom: 12px;
            position: relative;
            z-index: 2;
            letter-spacing: -.3px;
        }

        .cta-box p {
            font-size: 1rem;
            opacity: .92;
            margin-bottom: 26px;
            position: relative;
            z-index: 2;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            background: var(--warm);
            color: #fff;
            border-radius: 40px;
            padding: 13px 30px;
            font-weight: 700;
            text-decoration: none;
            box-shadow: 0 8px 24px rgba(245, 166, 35, .32);
            transition: transform .25s, box-shadow .25s;
            position: relative;
            z-index: 2;
        }

        .cta-btn:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 32px rgba(245, 166, 35, .42);
        }

        .not-found-main {
            min-height: 62vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 60px 24px;
        }

        .not-found-box {
            background: #fff;
            border-radius: 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            text-align: center;
            padding: 55px 50px;
            max-width: 520px;
        }

        .not-found-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 22px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--primary);
        }

        .not-found-box h1 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .not-found-box p {
            color: var(--muted);
            margin-bottom: 26px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 11px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: .92rem;
            text-decoration: none;
            transition: background .2s, transform .2s, box-shadow .2s;
            box-shadow: 0 6px 18px rgba(36, 86, 230, .26);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 24px rgba(36, 86, 230, .34);
        }

        .site-footer {
            background: var(--dark);
            color: #aab8d0;
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 45px;
            padding-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: .9rem;
            line-height: 1.8;
            color: #93a4bd;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

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

        .footer-col li {
            margin-bottom: 9px;
        }

        .footer-col li a {
            color: #aab8d0;
            text-decoration: none;
            font-size: .9rem;
            transition: color .2s, padding-left .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col li a i {
            font-size: .7rem;
            color: #4b6a9b;
        }

        .footer-col li a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: .82rem;
            color: #8093b0;
        }

        .footer-bottom a {
            color: #5ea0ff;
            text-decoration: none;
        }

        .back-to-top {
            position: fixed;
            right: 26px;
            bottom: 26px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 24px rgba(36, 86, 230, .32);
            transition: transform .2s, background .2s;
            z-index: 60;
        }

        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
        }

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

            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .brand-bar .container {
                flex-direction: column;
                gap: 12px;
                align-items: stretch;
            }

            .site-logo {
                justify-content: center;
            }

            .header-search form {
                width: 100%;
            }

            .header-search input {
                flex: 1;
                width: auto;
            }

            .channel-nav a {
                padding: 10px 14px;
                font-size: .85rem;
            }

            .page-banner {
                padding: 48px 0 36px;
            }

            .article-card {
                padding: 24px;
            }

            .article-header h1 {
                font-size: 1.55rem;
            }

            .article-desc {
                font-size: .98rem;
            }

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

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

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

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

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

            .site-logo {
                font-size: 1.2rem;
            }

            .header-search input {
                width: 100%;
                min-width: 0;
            }

            .article-section {
                padding: 36px 0 24px;
            }

            .article-card {
                padding: 20px;
                border-radius: 14px;
            }

            .article-header h1 {
                font-size: 1.3rem;
            }

            .article-meta {
                gap: 12px;
                font-size: .8rem;
            }

            .article-content h2 {
                font-size: 1.3rem;
            }

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

            .related-section {
                padding: 40px 0 20px;
            }

            .cta-section {
                padding: 30px 0 50px;
            }

            .cta-box {
                padding: 40px 22px;
            }

            .cta-box h2 {
                font-size: 1.4rem;
            }

            .section-head {
                flex-direction: column;
                gap: 10px;
                align-items: flex-start;
            }

            .section-head h2 {
                font-size: 1.35rem;
            }

            .back-to-top {
                right: 16px;
                bottom: 16px;
                width: 40px;
                height: 40px;
            }
        }

/* roulang page: category3 */
html { scroll-behavior: smooth; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; }
        .hero-bg {
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.88), rgba(37, 99, 235, 0.68), rgba(15, 23, 42, 0.72));
        }
        .hero-bg .hero-content { position: relative; z-index: 2; }
        .card-hover { transition: transform .3s ease, box-shadow .3s ease; }
        .card-hover:hover { transform: translateY(-6px); box-shadow: 0 12px 36px rgba(37, 99, 235, 0.15); }
        .step-line { position: relative; }
        .step-line::before { content: ''; position: absolute; left: 28px; top: 60px; bottom: 20px; width: 2px; background: linear-gradient(to bottom, #2563eb, #e2e8f0); }
        .step-line .step-item:last-child::before { display: none; } 
        .step-item { position: relative; }
        .step-num { position: relative; z-index: 1; }
        .footer-bg { background: #0b1120; }
        .footer-bg a { color: #94a3b8; transition: color .2s; }
        .footer-bg a:hover { color: #fff; }
        .channel-nav { border-top: 1px solid rgba(255,255,255,0.08); }
        .channel-nav a { color: #cbd5e1; font-weight: 500; padding: 14px 20px; font-size: 15px; transition: all .25s; border-bottom: 2px solid transparent; display: inline-flex; align-items: center; gap: 8px; }
        .channel-nav a:hover { color: #fff; border-bottom-color: rgba(255,255,255,0.3); }
        .channel-nav a.active { color: #fff; border-bottom-color: #f59e0b; }
        .top-bar { background: rgba(15,23,42,0.95); backdrop-filter: blur(10px); }
        .faq-item { transition: all .3s ease; }
        .faq-item details summary { list-style: none; }
        .faq-item details summary::-webkit-details-marker { display: none; }
        .faq-item details[open] { box-shadow: 0 8px 30px rgba(37,99,235,0.1); border-color: #bfdbfe; }
        .faq-item details[open] .fa-chevron-down { transform: rotate(180deg); }
        .faq-item .fa-chevron-down { transition: transform .3s; }
        .banner-bg {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .banner-bg::before { content: ''; position: absolute; inset: 0; background: rgba(15,23,42,0.85); }
        .banner-bg .banner-content { position: relative; z-index: 2; }
        .step-card { transition: all .3s ease; }
        .step-card:hover { border-color: #bfdbfe; box-shadow: 0 8px 30px rgba(37,99,235,0.08); }

/* roulang page: category2 */
:root {
            --primary: #4f46e5;
            --primary-dark: #3730a3;
            --primary-light: #818cf8;
            --accent: #06b6d4;
            --bg-soft: #f8fafc;
            --bg-white: #ffffff;
            --text-main: #0f172a;
            --text-body: #1e293b;
            --text-muted: #64748b;
            --border-main: #e2e8f0;
            --shadow-card: 0 4px 20px rgba(2, 6, 23, 0.06);
            --shadow-hover: 0 14px 40px rgba(79, 70, 229, 0.14);
            --shadow-lg: 0 20px 50px rgba(2, 6, 23, 0.12);
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-full: 999px;
        }

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

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

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.65;
            background-color: var(--bg-soft);
            color: var(--text-body);
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            outline: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: 0 2px 20px rgba(2, 6, 23, 0.04);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.65rem;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.4rem;
            height: 2.4rem;
            border-radius: 12px;
            background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 6px 18px rgba(79, 70, 229, 0.32);
            flex-shrink: 0;
        }

        .brand-tagline {
            font-size: 0.7rem;
            font-weight: 500;
            color: var(--text-muted);
            margin-left: 2rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            display: none;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border: 1px solid transparent;
            border-radius: var(--radius-full);
            padding: 0 0.4rem 0 1rem;
            transition: all 0.25s ease;
        }

        .search-box:focus-within {
            background: #fff;
            border-color: #c7d2fe;
            box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.08);
        }

        .search-box input {
            background: transparent;
            border: none;
            width: 130px;
            transition: width 0.25s ease;
            font-size: 0.85rem;
            padding: 0.55rem 0.4rem;
            color: var(--text-body);
        }

        .search-box input:focus {
            width: 170px;
        }

        .search-box .search-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.1rem;
            height: 2.1rem;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: background 0.2s ease;
            font-size: 0.8rem;
        }

        .search-box .search-btn:hover {
            background: var(--primary-dark);
        }

        .btn-trial {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-full);
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.2);
            white-space: nowrap;
        }

        .btn-trial:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(79, 70, 229, 0.3);
        }

        .nav-toggle {
            display: none;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 10px;
            border: 1px solid var(--border-main);
            background: #fff;
            color: var(--text-body);
            font-size: 1rem;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .nav-toggle:hover {
            background: #f1f5f9;
        }

        .channel-nav {
            display: flex;
            gap: 0.4rem;
            padding-bottom: 0.35rem;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .channel-nav::-webkit-scrollbar {
            display: none;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1.1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-full);
            transition: all 0.25s ease;
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .nav-item i {
            font-size: 0.8rem;
            opacity: 0.75;
            transition: opacity 0.2s ease;
        }

        .nav-item:hover {
            color: var(--primary);
            background: #eef2ff;
        }

        .nav-item.active {
            color: var(--primary);
            background: linear-gradient(135deg, #eef2ff, #e0e7ff);
            font-weight: 600;
            border-color: #c7d2fe;
            box-shadow: 0 2px 10px rgba(79, 70, 229, 0.1);
        }

        .nav-item.active i {
            opacity: 1;
        }

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

            .channel-nav {
                display: none;
                flex-direction: column;
                gap: 0.25rem;
                padding: 0.5rem 0 0.75rem;
                overflow: visible;
            }

            .channel-nav.nav-open {
                display: flex;
                border-top: 1px solid #f1f5f9;
            }

            .nav-item {
                border-radius: 10px;
                padding: 0.65rem 1rem;
            }

            .search-box {
                display: none !important;
            }
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.8rem 1.6rem;
            border-radius: var(--radius-full);
            transition: all 0.25s ease;
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.22);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(79, 70, 229, 0.32);
        }

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

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.8rem 1.6rem;
            border-radius: var(--radius-full);
            transition: all 0.25s ease;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(6px);
            cursor: pointer;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.18);
            transform: translateY(-2px);
        }

        .btn-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 0.85rem 1.8rem;
            border-radius: var(--radius-full);
            transition: all 0.25s ease;
            box-shadow: 0 6px 24px rgba(2, 6, 23, 0.12);
            border: none;
            cursor: pointer;
        }

        .btn-light:hover {
            background: #eef2ff;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(2, 6, 23, 0.16);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.8rem 1.8rem;
            border-radius: var(--radius-full);
            transition: all 0.25s ease;
            border: 1px solid rgba(255, 255, 255, 0.5);
            cursor: pointer;
        }

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

        /* ===== Section Head ===== */
        .section-head {
            max-width: 700px;
            margin-bottom: 3rem;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-head .kicker {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: #eef2ff;
            border-radius: var(--radius-full);
            padding: 0.35rem 1rem;
            margin-bottom: 0.6rem;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin: 0.6rem 0 0.8rem;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.7;
        }

        @media (max-width: 640px) {
            .section-head h2 {
                font-size: 1.6rem;
            }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            overflow: hidden;
            background-color: #0f172a;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(105deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 27, 75, 0.82) 38%, rgba(6, 182, 212, 0.4) 100%);
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            padding-top: 5rem;
            padding-bottom: 5rem;
            color: #fff;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.68);
            margin-bottom: 1.5rem;
        }

        .breadcrumb-nav a {
            color: rgba(255, 255, 255, 0.75);
            transition: color 0.2s ease;
        }

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

        .breadcrumb-nav i {
            font-size: 0.65rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: #67e8f9;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-full);
            padding: 0.4rem 1rem;
            margin-bottom: 1.2rem;
        }

        .page-hero h1 {
            font-size: 2.6rem;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: -0.03em;
            max-width: 700px;
            margin: 0 0 1rem;
            text-shadow: 0 4px 24px rgba(2, 6, 23, 0.4);
        }

        .page-hero .lead {
            font-size: 1.1rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.82);
            max-width: 620px;
            margin: 0 0 2rem;
        }

        @media (max-width: 768px) {
            .page-hero .container {
                padding-top: 3.5rem;
                padding-bottom: 3.5rem;
            }

            .page-hero h1 {
                font-size: 1.85rem;
            }

            .page-hero .lead {
                font-size: 1rem;
            }
        }

        /* ===== Feature Cards ===== */
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid #f1f5f9;
            box-shadow: var(--shadow-card);
            padding: 1.8rem;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: #e0e7ff;
        }

        .feature-card .icon-box {
            width: 3.5rem;
            height: 3.5rem;
            border-radius: 16px;
            background: #eef2ff;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            margin-bottom: 1.2rem;
            transition: all 0.3s ease;
        }

        .feature-card:hover .icon-box {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.28);
            transform: scale(1.06);
        }

        .feature-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 0.6rem;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0 0 1rem;
            flex-grow: 1;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.2s ease;
        }

        .card-link:hover {
            gap: 0.7rem;
        }

        /* ===== Deep Dive ===== */
        .dive-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
            margin-bottom: 4.5rem;
        }

        .dive-row:last-child {
            margin-bottom: 0;
        }

        .dive-image {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 18px 50px rgba(2, 6, 23, 0.12);
        }

        .dive-image img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .dive-image:hover img {
            transform: scale(1.04);
        }

        .dive-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.18), transparent 60%);
            pointer-events: none;
        }

        .dive-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            background: #eef2ff;
            border-radius: var(--radius-full);
            padding: 0.4rem 0.9rem;
            margin-bottom: 1rem;
        }

        .dive-content h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.35;
            margin: 0 0 0.8rem;
            letter-spacing: -0.01em;
        }

        .dive-content>p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.75;
            margin: 0 0 1.4rem;
        }

        .point-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .point-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.7rem;
            font-size: 0.92rem;
            color: var(--text-body);
        }

        .point-list li i {
            color: var(--accent);
            margin-top: 0.25rem;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        @media (max-width: 992px) {
            .dive-row {
                grid-template-columns: 1fr;
                gap: 1.8rem;
                margin-bottom: 3rem;
            }

            .dive-image {
                order: -1;
            }
        }

        /* ===== Stats Band ===== */
        .stats-band {
            background: linear-gradient(135deg, #0f172a 0%, #111c34 55%, #16244a 100%);
            position: relative;
            overflow: hidden;
        }

        .stats-band::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.25), transparent 70%);
            border-radius: 50%;
        }

        .stats-band::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: -50px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.2), transparent 70%);
            border-radius: 50%;
        }

        .stat-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .stat-value {
            font-size: 2.8rem;
            font-weight: 800;
            color: #67e8f9;
            letter-spacing: -0.02em;
            line-height: 1.1;
        }

        .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 0.5rem;
        }

        @media (max-width: 640px) {
            .stat-value {
                font-size: 2rem;
            }
        }

        /* ===== Feature List ===== */
        .list-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid #f1f5f9;
            box-shadow: var(--shadow-card);
            padding: 2rem;
            transition: all 0.3s ease;
            height: 100%;
        }

        .list-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: #e0e7ff;
        }

        .list-card .list-head {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 2px solid #eef2ff;
        }

        .list-card .list-head .head-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.4rem;
            height: 2.4rem;
            border-radius: 10px;
            font-size: 0.95rem;
            color: #fff;
            flex-shrink: 0;
        }

        .list-card .list-head h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
        }

        .list-card .list-head p {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin: 0;
        }

        .check-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.5;
        }

        .check-list li i {
            color: var(--accent);
            font-size: 0.75rem;
            margin-top: 0.35rem;
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #f8fafc;
            border: 1px solid #eef2f7;
            border-radius: 16px;
            padding: 1.4rem 1.6rem;
            transition: all 0.25s ease;
            margin-bottom: 1rem;
            overflow: hidden;
        }

        .faq-item:hover {
            background: #fff;
            border-color: #e0e7ff;
            box-shadow: 0 6px 24px rgba(2, 6, 23, 0.06);
        }

        .faq-item summary {
            list-style: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-arrow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 1.8rem;
            height: 1.8rem;
            border-radius: 50%;
            background: #eef2ff;
            color: var(--primary);
            font-size: 0.7rem;
            transition: all 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary .faq-arrow {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-item .faq-answer {
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid #e2e8f0;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, #4338ca 0%, #4f46e5 45%, #0891b2 100%);
            border-radius: var(--radius-lg);
            padding: 3.5rem 2.5rem;
            text-align: center;
            box-shadow: 0 24px 60px rgba(79, 70, 229, 0.3);
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent 70%);
            border-radius: 50%;
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin: 0 0 0.8rem;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin: 0 auto 2rem;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        @media (max-width: 640px) {
            .cta-box {
                padding: 2.5rem 1.5rem;
            }

            .cta-box h2 {
                font-size: 1.6rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding-top: 4rem;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 3rem;
            padding-bottom: 3rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-brand .footer-logo .logo-icon {
            width: 2.2rem;
            height: 2.2rem;
            font-size: 1rem;
            border-radius: 10px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.55);
            max-width: 340px;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 1.2rem;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }

        .footer-col ul li a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: all 0.2s ease;
        }

        .footer-col ul li a i {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.35);
            transition: transform 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: #67e8f9;
        }

        .footer-col ul li a:hover i {
            transform: translateX(3px);
            color: #67e8f9;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            padding: 1.5rem 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.2s ease;
        }

        .footer-bottom a:hover {
            color: #67e8f9;
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }

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

        /* ===== Section Spacing Uttils ===== */
        .section-py {
            padding-top: 4.5rem;
            padding-bottom: 4.5rem;
        }

        @media (max-width: 768px) {
            .section-py {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }
        }