/* roulang page: index */
:root {
            --bg: #0b1322;
            --bg-soft: #0e192a;
            --surface: #101b30;
            --surface-2: #14213a;
            --border: rgba(148, 163, 184, 0.14);
            --border-strong: rgba(148, 163, 184, 0.28);
            --primary: #38bdf8;
            --secondary: #f59e0b;
            --text: #e6edf6;
            --text-soft: #c5d2e3;
            --muted: #8a9eb2;
            --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.22);
            --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.34);
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg);
            color: var(--text);
            font-family: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, p, ul, ol, figure {
            margin: 0;
            padding: 0;
        }

        ul, ol {
            list-style: none;
        }

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

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

        button {
            font: inherit;
            border: none;
            background: none;
            color: inherit;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 6px;
        }

        ::selection {
            background: rgba(56, 189, 248, 0.3);
            color: #fff;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-inline: auto;
            padding-inline: 24px;
        }

        .section {
            position: relative;
            padding-block: 88px;
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 800;
            letter-spacing: 0.14em;
        }

        .eyebrow::before {
            content: "";
            width: 26px;
            height: 2px;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--primary), transparent);
        }

        .h2-title {
            font-size: clamp(1.45rem, 2.4vw, 2.1rem);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-top: 10px;
        }

        .section-lead {
            color: var(--muted);
            max-width: 680px;
            margin-top: 12px;
            font-size: 1rem;
        }

        .card {
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.009));
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
            overflow: hidden;
        }

        .card:hover {
            transform: translateY(-6px);
            border-color: var(--border-strong);
        }

        .cover-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

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

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

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 6px 13px;
            border-radius: 999px;
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.12em;
            background: rgba(15, 23, 42, 0.72);
            border: 1px solid var(--border-strong);
            color: var(--text-soft);
            backdrop-filter: blur(8px);
        }

        .badge-primary {
            color: var(--primary);
            border-color: rgba(56, 189, 248, 0.35);
            background: rgba(56, 189, 248, 0.1);
        }

        .badge-gold {
            color: #fbbf24;
            border-color: rgba(251, 191, 36, 0.35);
            background: rgba(251, 191, 36, 0.08);
        }

        .badge-ghost {
            background: transparent;
            border-color: var(--border);
            color: var(--text-soft);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 12px 24px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9375rem;
            line-height: 1;
            border: 1px solid transparent;
            transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease;
        }

        .btn-primary {
            color: #08111f;
            background: linear-gradient(135deg, #5eead4, #38bdf8);
            box-shadow: 0 10px 28px rgba(56, 189, 248, 0.22);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 34px rgba(56, 189, 248, 0.35);
        }

        .btn-ghost {
            color: var(--text-soft);
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--border-strong);
            backdrop-filter: blur(8px);
        }

        .btn-ghost:hover {
            color: #fff;
            border-color: var(--primary);
            background: rgba(56, 189, 248, 0.12);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 0.8125rem;
        }

        .btn-lg {
            padding: 15px 30px;
            font-size: 1rem;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(8, 14, 26, 0.8);
            border-bottom: 1px solid var(--border);
            backdrop-filter: blur(18px);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 16px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 0;
        }

        .brand-mark {
            display: grid;
            place-items: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            font-weight: 900;
            font-size: 1.1rem;
            color: #0b1322;
            background: linear-gradient(135deg, #5eead4, #38bdf8);
            box-shadow: 0 8px 20px rgba(56, 189, 248, 0.28);
            flex: 0 0 auto;
        }

        .brand-text {
            font-size: 1.125rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            line-height: 1.2;
        }

        .brand-sub {
            display: block;
            font-size: 0.7rem;
            color: var(--muted);
            font-weight: 500;
            letter-spacing: 0.08em;
        }

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

        .header-support {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8125rem;
            color: var(--muted);
            padding: 8px 14px;
            border: 1px solid var(--border);
            border-radius: 999px;
            transition: color 0.25s ease, border-color 0.25s ease;
        }

        .header-support:hover {
            color: #fff;
            border-color: var(--primary);
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.04);
            place-items: center;
            color: var(--text-soft);
            font-size: 1rem;
            transition: color 0.25s ease, border-color 0.25s ease;
        }

        .mobile-toggle:hover {
            color: #fff;
            border-color: var(--primary);
        }

        .nav-channel {
            background: rgba(10, 17, 31, 0.75);
            border-top: 1px solid rgba(255, 255, 255, 0.03);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 0;
            overflow-x: auto;
            scrollbar-width: none;
        }

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 18px;
            border-radius: 999px;
            color: var(--muted);
            font-weight: 600;
            font-size: 0.875rem;
            white-space: nowrap;
            transition: color 0.25s ease, background 0.25s ease;
        }

        .nav-link i {
            font-size: 0.8rem;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-link.active {
            color: #0b1322;
            background: linear-gradient(135deg, #5eead4, #38bdf8);
            box-shadow: 0 8px 20px rgba(56, 189, 248, 0.24);
        }

        .hero {
            position: relative;
            padding-block: 104px 96px;
            background-position: center;
            background-size: cover;
            border-bottom: 1px solid var(--border);
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(56, 189, 248, 0.16), transparent 60%), linear-gradient(90deg, rgba(8, 14, 26, 0.92) 0%, rgba(8, 14, 26, 0.68) 100%);
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 56px;
            align-items: center;
        }

        .hero-badge {
            margin-bottom: 18px;
        }

        .hero h1 {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 900;
            line-height: 1.25;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }

        .hero h1 span {
            color: var(--primary);
        }

        .hero-desc {
            color: var(--text-soft);
            font-size: 1.0625rem;
            max-width: 610px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 28px;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .hero-panel {
            background: rgba(13, 22, 40, 0.78);
            border: 1px solid var(--border-strong);
            border-radius: 24px;
            padding: 28px;
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(14px);
        }

        .hero-panel-title {
            font-size: 1.125rem;
            font-weight: 800;
            margin-bottom: 4px;
        }

        .hero-panel-sub {
            font-size: 0.8125rem;
            color: var(--muted);
            margin-bottom: 20px;
        }

        .hero-list {
            display: grid;
            gap: 14px;
        }

        .hero-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: 14px;
            background: rgba(255, 255, 255, 0.02);
            font-size: 0.9rem;
            color: var(--text-soft);
            transition: background 0.25s ease, border-color 0.25s ease;
        }

        .hero-list li:hover {
            background: rgba(56, 189, 248, 0.06);
            border-color: rgba(56, 189, 248, 0.3);
        }

        .hero-list i {
            color: var(--primary);
            width: 18px;
            text-align: center;
        }

        .stats-strip {
            border-bottom: 1px solid var(--border);
            background: rgba(14, 22, 38, 0.55);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding-block: 36px;
        }

        .stat-item {
            text-align: center;
            border-right: 1px solid var(--border);
            padding-inline: 18px;
        }

        .stat-item:last-child {
            border-right: 0;
        }

        .stat-value {
            font-size: 1.8rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
        }

        .stat-value span {
            color: var(--primary);
            font-size: 1.1rem;
            margin-left: 2px;
        }

        .stat-label {
            color: var(--muted);
            font-size: 0.875rem;
            margin-top: 4px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .feature-card {
            padding: 30px 26px;
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: grid;
            place-items: center;
            font-size: 1.05rem;
            color: var(--primary);
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.22);
            margin-bottom: 18px;
        }

        .feature-card h3 {
            font-size: 1.125rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .feature-card p {
            color: var(--muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .step-card {
            position: relative;
            padding: 34px 28px;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.009));
            overflow: hidden;
            transition: border-color 0.3s ease, transform 0.3s ease;
        }

        .step-card:hover {
            border-color: var(--border-strong);
            transform: translateY(-4px);
        }

        .step-num {
            display: inline-grid;
            place-items: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            font-weight: 900;
            color: #0b1322;
            background: linear-gradient(135deg, #5eead4, #38bdf8);
            margin-bottom: 18px;
        }

        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .step-card p {
            color: var(--muted);
            font-size: 0.9rem;
        }

        .category-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 26px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            min-height: 330px;
            display: flex;
            align-items: flex-end;
            border: 1px solid var(--border);
            transition: transform 0.3s ease, border-color 0.3s ease;
        }

        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-strong);
        }

        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .category-card::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 20%, rgba(8, 14, 26, 0.94) 88%);
        }

        .category-card-body {
            position: relative;
            z-index: 1;
            padding: 32px;
            width: 100%;
        }

        .category-card-body h3 {
            font-size: 1.35rem;
            font-weight: 900;
            margin-bottom: 8px;
        }

        .category-card-body p {
            color: var(--text-soft);
            font-size: 0.925rem;
            margin-bottom: 18px;
            max-width: 460px;
        }

        .news-section {
            background: var(--bg-soft);
            border-block: 1px solid var(--border);
        }

        .news-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }

        .news-item {
            display: flex;
            flex-direction: column;
            padding: 22px;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.02);
            transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
        }

        .news-item:hover {
            border-color: var(--border-strong);
            background: rgba(56, 189, 248, 0.04);
            transform: translateY(-3px);
        }

        .news-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 12px;
            color: var(--muted);
            font-size: 0.8125rem;
        }

        .news-item h3 {
            font-size: 1.05rem;
            font-weight: 800;
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .news-item h3 a:hover {
            color: var(--primary);
        }

        .news-excerpt {
            color: var(--muted);
            font-size: 0.9rem;
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .news-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.8125rem;
            color: var(--muted);
        }

        .news-footer a {
            color: var(--primary);
            font-weight: 600;
        }

        .empty-state {
            padding: 40px;
            text-align: center;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            color: var(--muted);
        }

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

        .guide-card {
            display: flex;
            flex-direction: column;
        }

        .guide-body {
            display: flex;
            flex-direction: column;
            gap: 10px;
            padding: 22px;
            flex: 1;
        }

        .guide-body h3 {
            font-size: 1.05rem;
            font-weight: 800;
            line-height: 1.4;
        }

        .guide-body p {
            color: var(--muted);
            font-size: 0.875rem;
            line-height: 1.65;
        }

        .guide-meta {
            margin-top: auto;
            color: var(--muted);
            font-size: 0.8rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .service-section {
            background-size: cover;
            background-position: center;
            border-block: 1px solid var(--border);
        }

        .service-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(8, 14, 26, 0.96), rgba(8, 14, 26, 0.78));
            z-index: 1;
        }

        .service-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .service-list {
            display: grid;
            gap: 16px;
            margin-top: 26px;
        }

        .service-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 16px 18px;
            background: rgba(255, 255, 255, 0.035);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            transition: border-color 0.25s ease, background 0.25s ease;
        }

        .service-list li:hover {
            border-color: rgba(56, 189, 248, 0.3);
            background: rgba(56, 189, 248, 0.05);
        }

        .service-list i {
            color: var(--primary);
            font-size: 1rem;
            margin-top: 5px;
        }

        .service-list h4 {
            font-size: 0.975rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .service-list p {
            color: var(--muted);
            font-size: 0.875rem;
        }

        .service-visual {
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-strong);
            box-shadow: var(--shadow-lg);
        }

        .service-visual img {
            width: 100%;
            height: 100%;
            max-height: 520px;
            object-fit: cover;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .faq-item {
            border: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            transition: border-color 0.25s ease, background 0.25s ease;
        }

        .faq-item[open] {
            border-color: rgba(56, 189, 248, 0.3);
            background: rgba(56, 189, 248, 0.03);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.975rem;
            color: var(--text);
            list-style: none;
        }

        .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(--muted);
            transition: transform 0.3s ease, color 0.3s ease;
        }

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

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

        .faq-item p {
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            color: var(--muted);
            font-size: 0.9rem;
            line-height: 1.75;
        }

        .cta-section {
            position: relative;
            background-size: cover;
            background-position: center;
            padding-block: 80px;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(8, 14, 26, 0.92), rgba(8, 14, 26, 0.72));
            z-index: 1;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            background: rgba(13, 22, 40, 0.72);
            border: 1px solid var(--border-strong);
            border-radius: 28px;
            padding: 46px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            backdrop-filter: blur(12px);
        }

        .cta-copy h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.9rem);
            font-weight: 900;
            line-height: 1.35;
            margin-bottom: 10px;
        }

        .cta-copy p {
            color: var(--text-soft);
            max-width: 560px;
        }

        .site-footer {
            border-top: 1px solid var(--border);
            background: #08101d;
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 1fr;
            gap: 44px;
            padding-bottom: 44px;
        }

        .footer-brand p {
            color: var(--muted);
            font-size: 0.9rem;
            margin-top: 14px;
            max-width: 380px;
        }

        .footer-title {
            font-size: 0.8125rem;
            font-weight: 800;
            letter-spacing: 0.1em;
            color: var(--text-soft);
            margin-bottom: 18px;
        }

        .footer-links li + li {
            margin-top: 12px;
        }

        .footer-links a {
            color: var(--muted);
            font-size: 0.9rem;
            transition: color 0.25s ease;
        }

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

        .footer-contact {
            display: grid;
            gap: 14px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--muted);
            font-size: 0.9rem;
        }

        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-block: 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            color: var(--muted);
            font-size: 0.8125rem;
        }

        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }

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

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

            .service-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding-block: 64px;
            }

            .header-support {
                display: none;
            }

            .mobile-toggle {
                display: inline-flex;
            }

            .nav-channel {
                display: none;
            }

            .nav-channel.open {
                display: block;
            }

            .nav-inner {
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0;
                overflow: visible;
            }

            .nav-link {
                justify-content: center;
            }

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

            .stat-item {
                border-right: 0;
                padding-inline: 10px;
            }

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

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

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

            .cta-inner {
                flex-direction: column;
                text-align: center;
                padding: 36px 28px;
            }

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

            .footer-grid > div:first-child {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-inline: 18px;
            }

            .header-top {
                height: 66px;
            }

            .brand-text {
                font-size: 1rem;
            }

            .brand-sub {
                font-size: 0.62rem;
            }

            .hero {
                padding-block: 80px 72px;
            }

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

            .hero-actions .btn {
                width: 100%;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .stat-value {
                font-size: 1.5rem;
            }

            .feature-grid,
            .guide-grid,
            .steps-grid {
                grid-template-columns: 1fr;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .cta-inner {
                padding: 28px 20px;
            }

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

            .news-item {
                padding: 18px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-base: #0a0e1a;
            --bg-panel: #0f1526;
            --bg-card: #141b30;
            --bg-card-hover: #1a2340;
            --primary: #6366f1;
            --primary-light: #818cf8;
            --primary-soft: rgba(99, 102, 241, 0.16);
            --accent: #22d3ee;
            --accent-soft: rgba(34, 211, 238, 0.12);
            --amber: #f5b04c;
            --text-main: #e8ecf4;
            --text-muted: #98a4bd;
            --border: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.15);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 24px 60px rgba(0, 0, 0, 0.45);
            --transition: all 0.28s cubic-bezier(0.25, 0.8, 0.35, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
            background: var(--bg-base);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
            overflow-x: hidden;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
            border-radius: 6px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 14, 26, 0.86);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
        }

        .brand-mark {
            width: 46px;
            height: 46px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: linear-gradient(135deg, #6366f1, #a855f7 62%, #22d3ee);
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.42);
            flex-shrink: 0;
        }

        .brand-text {
            display: block;
            font-size: 19px;
            font-weight: 800;
            letter-spacing: 1px;
            color: #fff;
            line-height: 1.3;
        }

        .brand-sub {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 1.5px;
            line-height: 1.4;
        }

        .header-tools {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .header-support {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            padding: 8px 16px;
            border-radius: 999px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .header-support:hover {
            color: #fff;
            border-color: var(--primary);
            background: var(--primary-soft);
        }

        .header-support i {
            color: var(--accent);
        }

        /* ===== Channel Nav ===== */
        .nav-channel {
            border-top: 1px solid var(--border);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 0;
            overflow-x: auto;
            scrollbar-width: none;
        }

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: var(--transition);
        }

        .nav-link i {
            font-size: 14px;
            color: var(--primary-light);
            opacity: 0.85;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: #fff;
            background: var(--primary-soft);
            border-color: rgba(99, 102, 241, 0.35);
            transform: translateY(-1px);
        }

        .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.34), rgba(168, 85, 247, 0.22));
            border-color: rgba(99, 102, 241, 0.52);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.26);
        }

        .nav-link.active i {
            color: #fff;
            opacity: 1;
        }

        .nav-scroll-hint {
            display: none;
            font-size: 11px;
            color: var(--text-muted);
            padding: 4px 0 10px;
            text-align: center;
            letter-spacing: 1px;
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            background-position: center;
            background-size: cover;
            padding: 110px 0 120px;
            overflow: hidden;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                linear-gradient(180deg, rgba(10, 14, 26, 0.52) 0%, rgba(10, 14, 26, 0.86) 100%),
                radial-gradient(920px 420px at 82% 18%, rgba(99, 102, 241, 0.30), transparent 62%);
        }

        .category-hero::after {
            content: "";
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 90px;
            background: linear-gradient(180deg, transparent, var(--bg-base));
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 22px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb i {
            font-size: 10px;
            opacity: 0.6;
        }

        .breadcrumb span {
            color: var(--text-main);
            font-weight: 600;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 16px;
            border-radius: 999px;
            background: var(--accent-soft);
            border: 1px solid rgba(34, 211, 238, 0.35);
            color: var(--accent);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }

        .hero-content h1 {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.5px;
            color: #fff;
            margin-bottom: 20px;
        }

        .hero-content h1 span {
            background: linear-gradient(90deg, #818cf8, #22d3ee);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 16px;
            color: #b8c2d6;
            max-width: 640px;
            margin-bottom: 34px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 48px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 30px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.2;
        }

        .btn i {
            font-size: 14px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            color: #fff;
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(99, 102, 241, 0.5);
            background: linear-gradient(135deg, #6f73f2, #9a6ff7);
        }

        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 8px 22px rgba(99, 102, 241, 0.35);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--border-strong);
            color: #dce3ee;
            backdrop-filter: blur(6px);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.28);
            color: #fff;
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            backdrop-filter: blur(8px);
            padding: 20px 8px;
            max-width: 560px;
        }

        .hero-stats > div {
            flex: 1;
            min-width: 120px;
            text-align: center;
            padding: 6px 12px;
            border-right: 1px solid var(--border);
        }

        .hero-stats > div:last-child {
            border-right: none;
        }

        .hero-stats strong {
            display: block;
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .hero-stats span {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 1px;
        }

        /* ===== Section ===== */
        .section {
            padding: 92px 0;
        }

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

        .section-head {
            max-width: 720px;
            margin: 0 auto 52px;
            text-align: center;
        }

        .section-kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 3px;
            color: var(--accent);
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: clamp(26px, 3.4vw, 38px);
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-muted);
        }

        /* ===== Cards / Grid ===== */
        .grid-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .method-card {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }

        .method-card:hover {
            transform: translateY(-8px);
            border-color: rgba(99, 102, 241, 0.45);
            box-shadow: var(--shadow-hover);
        }

        .method-thumb {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

        .method-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .method-card:hover .method-thumb img {
            transform: scale(1.07);
        }

        .method-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 14, 26, 0.65) 100%);
        }

        .method-num {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(10, 14, 26, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: #fff;
            font-size: 14px;
            font-weight: 800;
            backdrop-filter: blur(6px);
        }

        .method-body {
            padding: 22px 22px 26px;
        }

        .method-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .method-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .method-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 14px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-soft);
            border: 1px solid rgba(34, 211, 238, 0.25);
        }

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

        .step-item {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 34px 26px 28px;
            transition: var(--transition);
        }

        .step-item:hover {
            background: var(--bg-card-hover);
            border-color: rgba(34, 211, 238, 0.35);
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }

        .step-item .step-icon {
            width: 54px;
            height: 54px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 15px;
            font-size: 22px;
            color: #fff;
            background: linear-gradient(135deg, #6366f1, #22d3ee);
            box-shadow: 0 10px 26px rgba(99, 102, 241, 0.35);
            margin-bottom: 20px;
        }

        .step-item .step-num {
            position: absolute;
            top: 22px;
            right: 22px;
            font-size: 44px;
            font-weight: 800;
            line-height: 1;
            color: rgba(255, 255, 255, 0.06);
            letter-spacing: -2px;
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== Split / Prepare ===== */
        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .split-image {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .split-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .split-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(200deg, transparent 58%, rgba(10, 14, 26, 0.4));
        }

        .split-badge {
            position: absolute;
            z-index: 2;
            left: 20px;
            bottom: 20px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 999px;
            background: rgba(10, 14, 26, 0.75);
            border: 1px solid rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(10px);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
        }

        .split-badge i {
            color: var(--amber);
        }

        .split-content h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 18px;
        }

        .split-content > p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        .check-list {
            display: grid;
            gap: 14px;
        }

        .check-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 18px;
            border-radius: var(--radius-sm);
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .check-item:hover {
            border-color: rgba(99, 102, 241, 0.45);
            transform: translateX(4px);
        }

        .check-item i {
            margin-top: 4px;
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary-light);
            font-size: 11px;
            flex-shrink: 0;
        }

        .check-item strong {
            display: block;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 3px;
        }

        .check-item span {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Articles ===== */
        .post-list {
            display: grid;
            gap: 20px;
        }

        .post-card {
            display: grid;
            grid-template-columns: 260px 1fr;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }

        .post-card:hover {
            transform: translateY(-5px);
            border-color: rgba(99, 102, 241, 0.42);
            box-shadow: var(--shadow-hover);
        }

        .post-thumb {
            position: relative;
            min-height: 170px;
            overflow: hidden;
        }

        .post-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .post-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, transparent 60%, rgba(10, 14, 26, 0.4));
        }

        .post-body {
            padding: 24px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .post-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 12px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary-light);
            background: var(--primary-soft);
            border: 1px solid rgba(99, 102, 241, 0.28);
        }

        .post-date,
        .post-views {
            font-size: 12px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .post-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .post-body h3 a:hover {
            color: var(--primary-light);
        }

        .post-body p {
            font-size: 14px;
            color: var(--text-muted);
        }

        .load-more-wrap {
            text-align: center;
            margin-top: 42px;
        }

        .btn-outline {
            border: 1px solid var(--border-strong);
            color: #dce3ee;
            background: rgba(255, 255, 255, 0.03);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
            transform: translateY(-2px);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }

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

        .faq-item:hover {
            border-color: rgba(34, 211, 238, 0.3);
        }

        .faq-item[open] {
            border-color: rgba(99, 102, 241, 0.5);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            cursor: pointer;
            list-style: none;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            transition: var(--transition);
        }

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

        .faq-item summary:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .faq-item summary .faq-icon {
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 9px;
            background: var(--primary-soft);
            color: var(--primary-light);
            font-size: 13px;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item[open] summary .faq-icon {
            background: var(--accent-soft);
            color: var(--accent);
        }

        .faq-item summary .fa-chevron-down {
            margin-left: auto;
            font-size: 13px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            padding: 0 24px 22px 68px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .faq-answer a {
            color: var(--accent);
        }

        .faq-answer a:hover {
            text-decoration: underline;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 96px 0;
            background-position: center;
            background-size: cover;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(10, 14, 26, 0.94) 20%, rgba(20, 26, 48, 0.82));
        }

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

        .cta-inner h2 {
            font-size: clamp(26px, 3.6vw, 38px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
        }

        .cta-inner p {
            font-size: 15px;
            color: #b8c2d6;
            margin-bottom: 34px;
        }

        .cta-contact {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 14px 34px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-strong);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
        }

        .cta-contact:hover {
            border-color: var(--accent);
            background: var(--accent-soft);
            transform: translateY(-3px);
        }

        .cta-contact i {
            color: var(--accent);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #070b15;
            border-top: 1px solid var(--border);
            padding: 64px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border);
        }

        .footer-brand p {
            margin-top: 18px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 380px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, #6366f1, #22d3ee);
        }

        .footer-links {
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a::before {
            content: "";
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--primary);
            opacity: 0.6;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #fff;
            transform: translateX(4px);
        }

        .footer-links a:hover::before {
            opacity: 1;
            background: var(--accent);
        }

        .footer-contact {
            display: grid;
            gap: 14px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .footer-contact i {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 13px;
            flex-shrink: 0;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            padding-top: 26px;
            font-size: 13px;
            color: #6d7895;
        }

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

            .post-card {
                grid-template-columns: 220px 1fr;
            }

            .section {
                padding: 76px 0;
            }
        }

        @media (max-width: 768px) {
            .header-tools {
                display: none;
            }

            .brand-text {
                font-size: 17px;
            }

            .brand-sub {
                font-size: 11px;
            }

            .category-hero {
                padding: 80px 0 90px;
            }

            .hero-stats > div {
                min-width: 100px;
            }

            .split-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .post-card {
                grid-template-columns: 1fr;
            }

            .post-thumb {
                min-height: 200px;
            }

            .post-thumb::after {
                background: linear-gradient(180deg, transparent 60%, rgba(10, 14, 26, 0.5));
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .section {
                padding: 64px 0;
            }

            .nav-scroll-hint {
                display: block;
            }
        }

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

            .grid-cards,
            .steps-grid {
                grid-template-columns: 1fr;
            }

            .hero-stats {
                flex-direction: column;
                gap: 4px;
            }

            .hero-stats > div {
                min-width: 100%;
                border-right: none;
                border-bottom: 1px solid var(--border);
                padding: 12px 8px;
            }

            .hero-stats > div:last-child {
                border-bottom: none;
            }

            .hero-actions {
                flex-direction: column;
            }

            .btn {
                width: 100%;
            }

            .brand-mark {
                width: 40px;
                height: 40px;
                font-size: 19px;
                border-radius: 12px;
            }

            .faq-answer {
                padding: 0 18px 20px 18px;
            }

            .faq-item summary {
                padding: 16px 18px;
                font-size: 14px;
            }

            .post-body {
                padding: 20px;
            }
        }

/* roulang page: article */
:root {
            --bg-deep: #080d1a;
            --bg-base: #0b1120;
            --bg-panel: #101a30;
            --bg-panel-strong: #16233f;
            --bg-hover: #1a2a48;
            --border: #1d2b47;
            --border-light: #2a3c5f;
            --primary: #38bdf8;
            --primary-deep: #0ea5e9;
            --accent: #f59e0b;
            --success: #10b981;
            --text-main: #e7edf6;
            --text-weak: #92a4c2;
            --text-mute: #62708a;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 4px 16px -4px rgba(0, 0, 0, .35);
            --shadow-md: 0 16px 40px -10px rgba(0, 0, 0, .45);
            --shadow-lg: 0 30px 70px -15px rgba(0, 0, 0, .55);
            --transition: all .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            background: var(--bg-base);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(56, 189, 248, .5);
            outline-offset: 2px;
            border-radius: 8px;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: relative;
            background: var(--bg-deep);
            border-bottom: 1px solid var(--border);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            gap: 20px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .brand-mark {
            width: 46px;
            height: 46px;
            flex: 0 0 46px;
            border-radius: 14px;
            background: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 60%, #0284c7 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 24px;
            color: #fff;
            box-shadow: 0 8px 24px -6px rgba(56, 189, 248, .5);
        }

        .brand-info {
            display: flex;
            flex-direction: column;
            line-height: 1.3;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: .5px;
            color: #fff;
        }

        .brand-sub {
            font-size: 12px;
            color: var(--text-weak);
            letter-spacing: 1px;
        }

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

        .header-search {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--bg-panel);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 10px 18px;
            width: 260px;
            transition: var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, .15);
        }

        .header-search i {
            color: var(--text-mute);
        }

        .header-search input {
            flex: 1;
            background: none;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 14px;
        }

        .header-search input::placeholder {
            color: var(--text-mute);
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--bg-panel);
            border: 1px solid var(--border);
            color: var(--text-main);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .menu-toggle:hover {
            background: var(--bg-hover);
        }

        .nav-channel {
            background: rgba(8, 13, 26, .92);
            backdrop-filter: blur(16px);
            border-top: 1px solid rgba(42, 60, 95, .4);
            position: sticky;
            top: 0;
            z-index: 50;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 6px;
            overflow-x: auto;
            scrollbar-width: none;
        }

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            border-bottom: 2px solid transparent;
            transition: color .2s, background .2s;
        }

        .nav-link i {
            font-size: 15px;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(56, 189, 248, .08);
        }

        .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(56, 189, 248, .15), rgba(14, 165, 233, .08));
            border-bottom-color: var(--primary);
        }

        .section {
            padding: 72px 24px;
            position: relative;
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(56, 189, 248, .1);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
            border: 1px solid rgba(56, 189, 248, .25);
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 999px;
            background: linear-gradient(135deg, #38bdf8, #0ea5e9);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            box-shadow: 0 8px 24px -6px rgba(56, 189, 248, .4);
            transition: all .3s;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 36px -8px rgba(56, 189, 248, .55);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 999px;
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 15px;
            border: 1px solid var(--border-light);
            transition: all .3s;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(56, 189, 248, .06);
        }

        .btn-lg {
            padding: 16px 34px;
            font-size: 16px;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 999px;
            color: var(--text-weak);
            border: 1px solid var(--border);
            transition: all .2s;
            font-size: 14px;
            font-weight: 500;
            background: transparent;
        }

        .btn-ghost:hover {
            color: #fff;
            border-color: var(--primary);
            background: rgba(56, 189, 248, .06);
        }

        .btn-small {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 18px;
            border-radius: 999px;
            background: rgba(56, 189, 248, .12);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(56, 189, 248, .3);
            transition: all .2s;
        }

        .btn-small:hover {
            background: rgba(56, 189, 248, .2);
        }

        .badge-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            background: linear-gradient(135deg, rgba(56, 189, 248, .18), rgba(14, 165, 233, .1));
            border: 1px solid rgba(56, 189, 248, .35);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
        }

        .badge-category.small {
            font-size: 12px;
            padding: 4px 12px;
        }

        .article-hero {
            position: relative;
            padding: 90px 0 70px;
            background: linear-gradient(135deg, rgba(8, 13, 26, .95), rgba(16, 26, 48, .88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
        }

        .article-hero-inner {
            position: relative;
            z-index: 2;
            max-width: 880px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-mute);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-weak);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb i {
            font-size: 12px;
            color: var(--text-mute);
        }

        .article-hero h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.3;
            margin: 20px 0 16px;
            letter-spacing: .5px;
        }

        .article-hero-desc {
            font-size: 17px;
            color: var(--text-weak);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .article-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-mute);
            margin-top: 10px;
        }

        .article-hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .article-body {
            padding: 64px 0 80px;
            background: var(--bg-base);
        }

        .article-main {
            min-width: 0;
        }

        .article-cover-wrap {
            border-radius: 20px;
            overflow: hidden;
            margin-bottom: 36px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
        }

        .article-cover-wrap img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }

        .article-content {
            color: var(--text-main);
            font-size: 16px;
            line-height: 2;
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            margin: 32px 0 16px;
            font-weight: 700;
            line-height: 1.4;
            color: #fff;
        }

        .article-content h2 {
            font-size: 26px;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
        }

        .article-content h3 {
            font-size: 21px;
        }

        .article-content h4 {
            font-size: 18px;
        }

        .article-content p {
            margin-bottom: 18px;
            color: #c7d2e2;
        }

        .article-content img {
            border-radius: 16px;
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid rgba(56, 189, 248, .4);
        }

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

        .article-content ul,
        .article-content ol {
            margin: 0 0 18px 24px;
        }

        .article-content li {
            margin-bottom: 8px;
            color: #c7d2e2;
        }

        .article-content ul li::marker {
            color: var(--primary);
        }

        .article-content blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            background: var(--bg-panel);
            border-left: 4px solid var(--primary);
            border-radius: 0 14px 14px 0;
            color: var(--text-weak);
            font-style: italic;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 12px 16px;
            text-align: left;
        }

        .article-content th {
            background: var(--bg-panel);
            color: #fff;
            font-weight: 600;
        }

        .article-content code {
            background: var(--bg-panel);
            border-radius: 6px;
            padding: 2px 8px;
            font-size: 14px;
            color: var(--primary);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin: 36px 0 28px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .tags-label {
            font-size: 14px;
            color: var(--text-mute);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-right: 4px;
        }

        .article-tag {
            display: inline-flex;
            padding: 6px 16px;
            border-radius: 999px;
            background: var(--bg-panel);
            border: 1px solid var(--border);
            color: var(--text-weak);
            font-size: 13px;
            transition: all .2s;
        }

        .article-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(56, 189, 248, .08);
        }

        .article-footer-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            margin-top: 10px;
        }

        .article-empty {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-panel);
            border-radius: 24px;
            border: 1px solid var(--border);
        }

        .empty-icon {
            font-size: 48px;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .article-empty h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }

        .article-empty p {
            color: var(--text-weak);
            margin-bottom: 28px;
        }

        .article-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .side-card {
            background: var(--bg-panel);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 24px;
            transition: var(--transition);
        }

        .side-card:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-sm);
        }

        .side-card-head {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .side-card-head i {
            color: var(--primary);
            font-size: 18px;
            width: 24px;
            text-align: center;
        }

        .side-security .side-card-head i {
            color: var(--accent);
        }

        .side-support .side-card-head i {
            color: #34d399;
        }

        .side-info-list {
            list-style: none;
        }

        .side-info-list li {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }

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

        .side-info-list span {
            color: var(--text-mute);
            flex-shrink: 0;
        }

        .side-info-list strong {
            color: var(--text-main);
            font-weight: 500;
            text-align: right;
        }

        .side-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .related {
            background: var(--bg-deep);
            padding: 80px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

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

        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-panel);
            border: 1px solid var(--border);
            border-radius: 20px;
            overflow: hidden;
            transition: all .35s;
        }

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

        .related-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

        .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }

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

        .related-play {
            position: absolute;
            right: 14px;
            bottom: 14px;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(8, 13, 26, .7);
            backdrop-filter: blur(8px);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            border: 1px solid rgba(255, 255, 255, .2);
        }

        .related-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .related-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            color: #fff;
        }

        .related-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        .related-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: auto;
            padding-top: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap .2s;
        }

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

        .article-faq {
            padding: 80px 0;
            background: var(--bg-base);
        }

        .faq-wrap {
            max-width: 860px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            transition: all .3s;
        }

        .faq-item[open] {
            border-color: rgba(56, 189, 248, .4);
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            list-style: none;
            transition: background .2s;
        }

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

        .faq-item summary:hover {
            background: var(--bg-hover);
        }

        .faq-item summary i {
            color: var(--primary);
        }

        .faq-icon {
            margin-left: auto;
            color: var(--text-mute);
            transition: transform .3s;
        }

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

        .faq-answer {
            padding: 0 24px 20px 60px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.9;
        }

        .faq-answer p {
            margin-bottom: 10px;
        }

        .article-cta {
            padding: 80px 0;
            background: var(--bg-deep);
        }

        .cta-panel {
            border-radius: 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            background: linear-gradient(135deg, rgba(56, 189, 248, .14), rgba(14, 165, 233, .06)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            border: 1px solid rgba(56, 189, 248, .25);
            padding: 56px;
            overflow: hidden;
            position: relative;
        }

        .cta-info {
            max-width: 460px;
            position: relative;
            z-index: 2;
        }

        .cta-info h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-info p {
            color: var(--text-weak);
            margin-bottom: 28px;
            font-size: 16px;
            line-height: 1.8;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .cta-art {
            flex: 1;
            max-width: 340px;
            position: relative;
            z-index: 2;
        }

        .cta-art img {
            border-radius: 20px;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(255, 255, 255, .1);
        }

        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand p {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.8;
            margin-top: 18px;
            max-width: 360px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: var(--text-weak);
            font-size: 14px;
            transition: color .2s;
        }

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

        .footer-contact {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            color: var(--text-weak);
            font-size: 14px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--primary);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
            color: var(--text-mute);
            font-size: 13px;
        }

        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 18px;
            }

            .article-hero {
                padding: 70px 0 50px;
            }

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

        @media (max-width: 768px) {
            .section {
                padding: 52px 0;
            }

            .header-top {
                padding: 16px 20px;
            }

            .header-search {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
            }

            .nav-channel {
                display: none;
            }

            .nav-channel.open {
                display: block;
            }

            .nav-inner {
                flex-direction: column;
                align-items: stretch;
                padding: 10px 20px;
            }

            .nav-link {
                justify-content: flex-start;
                padding: 14px 16px;
            }

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

            .article-body {
                padding: 40px 0 60px;
            }

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

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

            .cta-panel {
                flex-direction: column;
                padding: 36px 24px;
            }

            .cta-art {
                max-width: 100%;
            }

            .article-footer-nav {
                flex-direction: column;
                align-items: flex-start;
            }

            .faq-answer {
                padding-left: 24px;
            }
        }

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

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

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

            .brand-text {
                font-size: 18px;
            }

            .brand-mark {
                width: 40px;
                height: 40px;
                font-size: 20px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-primary,
            .btn-outline {
                justify-content: center;
            }

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

/* roulang page: category2 */
:root {
            --brand-primary: #00d4ff;
            --brand-secondary: #7b61ff;
            --brand-accent: #00ffc8;
            --bg-dark: #0a0f1e;
            --bg-card: #121a2e;
            --bg-card-hover: #172238;
            --bg-soft: #1e2738;
            --text-main: #f0f4ff;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(0, 212, 255, 0.35);
            --radius-lg: 1.25rem;
            --radius-md: 0.875rem;
            --radius-sm: 0.5rem;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.12);
            --transition-standard: all 0.3s cubic-bezier(.4, 0, .2, 1);
            --font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-family);
            background-color: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        input, textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 15, 30, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
        }

        .header-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 1rem;
            padding-bottom: 1rem;
        }

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

        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.75rem;
            height: 2.75rem;
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
            border-radius: 0.75rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
            letter-spacing: 0.05em;
        }

        .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.02em;
            background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .brand-sub {
            display: block;
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--text-muted);
            letter-spacing: 0.08em;
            margin-top: 0.1rem;
        }

        .header-action {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: rgba(30, 39, 56, 0.7);
            border: 1px solid var(--border-light);
            border-radius: 999px;
            padding: 0.4rem 0.4rem 0.4rem 1rem;
            transition: var(--transition-standard);
        }

        .header-search:focus-within {
            border-color: var(--border-glow);
            box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
        }

        .header-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 0.875rem;
            width: 160px;
        }

        .header-search input::placeholder {
            color: var(--text-dim);
        }

        .header-search button {
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
            border: none;
            border-radius: 999px;
            color: #fff;
            width: 30px;
            height: 30px;
            font-size: 0.8rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-standard);
        }

        .header-search button:hover {
            opacity: 0.9;
            transform: scale(1.05);
        }

        .nav-channel {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            background: rgba(18, 26, 46, 0.5);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            overflow-x: auto;
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
            scrollbar-width: thin;
            scrollbar-color: var(--brand-primary) transparent;
        }

        .nav-inner::-webkit-scrollbar {
            height: 3px;
        }

        .nav-inner::-webkit-scrollbar-thumb {
            background: var(--brand-primary);
            border-radius: 3px;
        }

        .nav-inner::-webkit-scrollbar-track {
            background: transparent;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1.25rem;
            border-radius: 999px;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            transition: var(--transition-standard);
            border: 1px solid transparent;
        }

        .nav-link i {
            font-size: 0.8rem;
            color: var(--brand-primary);
            opacity: 0.7;
            transition: var(--transition-standard);
        }

        .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.08);
            transform: translateY(-1px);
        }

        .nav-link:hover i {
            opacity: 1;
        }

        .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(123, 97, 255, 0.2));
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: 0 0 15px rgba(0, 212, 255, 0.15);
            font-weight: 600;
        }

        .nav-link.active i {
            opacity: 1;
            color: #fff;
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding: 5rem 0;
            background: linear-gradient(135deg, rgba(10, 15, 30, 0.92), rgba(18, 26, 46, 0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border-light);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 70%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.12) 0%, transparent 60%);
            animation: heroPulse 6s ease-in-out infinite;
        }

        @keyframes heroPulse {
            0%, 100% { opacity: 0.6; }
            50% { opacity: 1; }
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            max-width: 900px;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid var(--border-glow);
            border-radius: 999px;
            padding: 0.4rem 1.25rem;
            font-size: 0.8rem;
            color: var(--brand-primary);
            margin-bottom: 1.5rem;
            letter-spacing: 0.06em;
        }

        .page-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1.25rem;
            color: var(--text-main);
            letter-spacing: 0.02em;
        }

        .page-hero h1 span {
            color: var(--brand-primary);
        }

        .page-hero p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-top: 2.5rem;
        }

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

        .hero-stat .num {
            font-size: 2.25rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .hero-stat .label {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        /* Sections */
        .section {
            padding: 5rem 0;
        }

        .section-alt {
            background: linear-gradient(180deg, rgba(18, 26, 46, 0.4), rgba(10, 15, 30, 0.6));
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 3rem;
        }

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

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--brand-primary);
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.2);
            padding: 0.3rem 0.9rem;
            border-radius: 999px;
            margin-bottom: 0.75rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 0.75rem;
            letter-spacing: 0.02em;
        }

        .section-title span {
            color: var(--brand-primary);
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.75;
        }

        /* Security Feature Cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            transition: var(--transition-standard);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
            opacity: 0;
            transition: var(--transition-standard);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-card), var(--shadow-glow);
            border-color: var(--border-glow);
        }

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

        .feature-icon {
            width: 3.5rem;
            height: 3.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 1rem;
            font-size: 1.5rem;
            color: var(--brand-primary);
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.2);
            margin-bottom: 1.25rem;
            transition: var(--transition-standard);
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.1);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            letter-spacing: 0.02em;
        }

        .feature-card p {
            color: var(--text-muted);
            font-size: 0.925rem;
            line-height: 1.7;
            margin-bottom: 1.25rem;
        }

        .feature-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.75rem;
            color: var(--brand-accent);
            background: rgba(0, 255, 200, 0.08);
            border: 1px solid rgba(0, 255, 200, 0.15);
            padding: 0.25rem 0.8rem;
            border-radius: 999px;
        }

        /* Security Guide Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            position: relative;
            transition: var(--transition-standard);
        }

        .step-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
            transform: translateY(-4px);
        }

        .step-number {
            width: 3.5rem;
            height: 3.5rem;
            margin: 0 auto 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
            border-radius: 50%;
            box-shadow: 0 0 25px rgba(0, 212, 255, 0.3);
        }

        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
        }

        .step-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -1.1rem;
            transform: translateY(-50%);
            color: var(--brand-primary);
            font-size: 1rem;
            z-index: 2;
            opacity: 0.7;
        }

        .step-card:last-child .step-arrow {
            display: none;
        }

        /* Security Content Cards */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .content-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition-standard);
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card);
            border-color: var(--border-glow);
        }

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

        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .content-card:hover .card-image img {
            transform: scale(1.08);
        }

        .card-image::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 50%;
            background: linear-gradient(to top, rgba(10, 15, 30, 0.9), transparent);
        }

        .card-badge {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: rgba(0, 212, 255, 0.9);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
            z-index: 2;
        }

        .card-body {
            padding: 1.75rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            line-height: 1.4;
            transition: color 0.2s ease;
        }

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

        .card-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            flex: 1;
            margin-bottom: 1.25rem;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-dim);
            border-top: 1px solid var(--border-light);
            padding-top: 1rem;
        }

        .card-meta .date i {
            margin-right: 0.3rem;
        }

        .card-meta .more {
            color: var(--brand-primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: gap 0.3s ease;
        }

        .card-meta .more:hover {
            gap: 0.6rem;
        }

        /* Data Section */
        .data-band {
            position: relative;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(123, 97, 255, 0.06)), url('/assets/images/backpic/back-3.png') center/cover;
            border-radius: var(--radius-lg);
            padding: 3.5rem;
            border: 1px solid rgba(0, 212, 255, 0.15);
            overflow: hidden;
        }

        .data-band::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 15, 30, 0.75);
            z-index: 1;
        }

        .data-band .container {
            position: relative;
            z-index: 2;
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }

        .data-item .value {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .data-item .label {
            color: var(--text-muted);
            font-size: 0.925rem;
            margin-top: 0.4rem;
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            transition: var(--transition-standard);
            overflow: hidden;
        }

        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
        }

        .faq-item summary {
            padding: 1.4rem 1.75rem;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            list-style: none;
            position: relative;
            transition: var(--transition-standard);
        }

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

        .faq-item summary::before {
            content: attr(data-icon);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2rem;
            height: 2rem;
            border-radius: 0.5rem;
            background: rgba(0, 212, 255, 0.12);
            color: var(--brand-primary);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            margin-left: auto;
            font-size: 0.8rem;
            color: var(--text-dim);
            transition: transform 0.3s ease;
        }

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

        .faq-item[open] {
            border-color: var(--border-glow);
        }

        .faq-content {
            padding: 0 1.75rem 1.5rem 4.5rem;
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 0.95rem;
        }

        /* CTA */
        .cta-section {
            position: relative;
            padding: 5rem 0;
            background: linear-gradient(135deg, rgba(10, 15, 30, 0.8), rgba(18, 26, 46, 0.9)), url('/assets/images/backpic/back-1.png') center/cover;
            text-align: center;
        }

        .cta-box {
            max-width: 750px;
            margin: 0 auto;
            background: rgba(18, 26, 46, 0.8);
            border: 1px solid rgba(0, 212, 255, 0.25);
            border-radius: var(--radius-lg);
            padding: 3.5rem;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .cta-box h2 span {
            color: var(--brand-primary);
        }

        .cta-box p {
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 2rem;
            line-height: 1.75;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.875rem 2.25rem;
            font-size: 1rem;
            font-weight: 600;
            border: none;
            border-radius: 999px;
            transition: var(--transition-standard);
            line-height: 1.4;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
            color: #fff;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-main);
            border: 2px solid rgba(255, 255, 255, 0.25);
        }

        .btn-outline:hover {
            border-color: var(--brand-primary);
            color: var(--brand-primary);
            background: rgba(0, 212, 255, 0.06);
        }

        .btn:focus, .nav-link:focus-visible, .faq-item summary:focus-visible {
            outline: 2px solid var(--brand-primary);
            outline-offset: 3px;
        }

        /* Footer */
        .site-footer {
            background: #0d1220;
            border-top: 1px solid var(--border-light);
            padding: 4rem 0 1rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 2.5rem;
            margin-bottom: 3rem;
        }

        .footer-brand .brand {
            margin-bottom: 1rem;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.8;
            margin-top: 1rem;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1.25rem;
            letter-spacing: 0.03em;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition-standard);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .footer-links a:hover {
            color: var(--brand-primary);
            transform: translateX(4px);
        }

        .footer-contact {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .footer-contact i {
            color: var(--brand-primary);
            width: 1.2rem;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 1.75rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.75rem;
            color: var(--text-dim);
            font-size: 0.85rem;
            text-align: center;
        }

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

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

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

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

            .page-hero h1 {
                font-size: 2.2rem;
            }

            .section-title {
                font-size: 1.75rem;
            }
        }

        @media (max-width: 768px) {
            .header-main {
                flex-wrap: wrap;
                gap: 0.75rem;
            }

            .header-search {
                display: none;
            }

            .page-hero {
                padding: 3.5rem 0;
            }

            .page-hero h1 {
                font-size: 1.8rem;
            }

            .hero-stats {
                gap: 2rem;
                flex-wrap: wrap;
            }

            .hero-stat .num {
                font-size: 1.75rem;
            }

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

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

            .section {
                padding: 3.5rem 0;
            }

            .section-title {
                font-size: 1.5rem;
            }

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

            .step-arrow {
                display: none;
            }

            .data-band {
                padding: 2.5rem 1.5rem;
            }

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

            .data-item .value {
                font-size: 2rem;
            }

            .cta-box {
                padding: 2.5rem 1.5rem;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .brand-text {
                font-size: 1.1rem;
            }

            .faq-content {
                padding: 0 1.25rem 1.25rem 1.25rem;
            }

            .faq-item summary {
                padding: 1.1rem 1.25rem;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .nav-link {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }

            .page-hero h1 {
                font-size: 1.5rem;
            }

            .page-hero p {
                font-size: 0.95rem;
            }

            .hero-stats {
                gap: 1rem;
                flex-direction: column;
                align-items: center;
                margin-top: 2rem;
            }

            .hero-stat .num {
                font-size: 2rem;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .feature-card {
                padding: 1.25rem;
            }

            .btn {
                padding: 0.75rem 1.75rem;
                font-size: 0.9rem;
            }

            .footer-bottom {
                font-size: 0.8rem;
            }

            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }

            .data-item .value {
                font-size: 1.5rem;
            }
        }