/* roulang page: index */
:root {
            --bg-deep: #05080F;
            --bg-base: #0A1322;
            --bg-soft: #0D1B2E;
            --bg-mid: #0C1A2B;
            --brand: #2FA7FF;
            --brand-deep: #0D6FB8;
            --brand-light: #6CC8FF;
            --accent: #00E0D4;
            --warning: #F5A623;
            --danger: #FF6A55;
            --text-main: #F1F7FF;
            --text-sub: #9FB0C7;
            --text-weak: #647B94;
            --glass: rgba(255, 255, 255, 0.055);
            --glass-strong: rgba(255, 255, 255, 0.09);
            --stroke: rgba(255, 255, 255, 0.12);
            --stroke-soft: rgba(255, 255, 255, 0.06);
            --radius-card: 18px;
            --radius-btn: 11px;
            --radius-panel: 14px;
            --radius-pill: 999px;
            --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.04);
            --shadow-card-hover: 0 24px 52px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(47, 167, 255, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.07);
            --glow-primary: 0 0 0 1px rgba(47, 167, 255, 0.3), 0 10px 34px rgba(47, 167, 255, 0.34);
            --font-main: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --section-space: clamp(72px, 8vw, 118px);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-main);
            background: radial-gradient(ellipse at top left, #0C1B31 0%, #060A13 60%), var(--bg-deep);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 0.98rem;
            -webkit-font-smoothing: antialiased;
        }

        body.has-bottom-bar {
            padding-bottom: 70px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
        }

        h1 {
            font-size: clamp(2rem, 5vw, 3.3rem);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        h2 {
            font-size: clamp(1.45rem, 2.8vw, 2rem);
            position: relative;
            margin-bottom: 0.6rem;
        }

        h3 {
            font-size: 1.15rem;
        }

        p {
            color: var(--text-sub);
        }

        a {
            color: var(--brand-light);
            text-decoration: none;
            transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

        a:hover {
            color: #fff;
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .row {
            margin-left: -12px;
            margin-right: -12px;
        }

        .row>[class*="col-"] {
            padding-left: 12px;
            padding-right: 12px;
        }

        .section {
            padding: var(--section-space) 0;
            position: relative;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 2.8rem;
        }

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

        .section-head .section-sub {
            color: var(--text-sub);
            font-size: 1rem;
            margin-top: 10px;
            margin-bottom: 0;
        }

        .section-title {
            display: flex;
            align-items: center;
            gap: 0.72rem;
            margin-bottom: 1.2rem;
        }

        .section-title:before {
            content: "";
            flex: 0 0 auto;
            width: 5px;
            height: 26px;
            border-radius: 6px;
            background: linear-gradient(180deg, var(--brand), var(--accent));
            box-shadow: 0 0 14px rgba(47, 167, 255, 0.55);
        }

        .text-weak {
            color: var(--text-weak) !important;
        }

        .text-sub {
            color: var(--text-sub) !important;
        }

        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            padding: 0.65rem 1.45rem;
            border: 1px solid transparent;
            font-size: 0.96rem;
            transition: all 0.25s ease;
        }

        .btn:focus,
        .btn-close:focus {
            outline: none;
            box-shadow: 0 0 0 4px rgba(47, 167, 255, 0.25);
        }

        .btn-primary {
            background: linear-gradient(135deg, #3bb1ff, #1b7acc);
            border-color: rgba(255, 255, 255, 0.18);
            color: #fff;
            box-shadow: var(--glow-primary);
        }

        .btn-primary:hover {
            color: #fff;
            background: linear-gradient(135deg, #58bfff, #2381d4);
            border-color: rgba(255, 255, 255, 0.26);
            transform: translateY(-2px);
            box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12), 0 16px 40px rgba(47, 167, 255, 0.45);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.24);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
            backdrop-filter: blur(8px);
        }

        .btn-outline-light:hover {
            background: rgba(47, 167, 255, 0.16);
            border-color: var(--brand);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 0 3px rgba(47, 167, 255, 0.16);
        }

        .btn-light {
            background: #F1F7FF;
            color: #0A1322;
            border: 1px solid rgba(255, 255, 255, 0.8);
        }

        .btn-light:hover {
            background: #fff;
            color: #0A1322;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 0.45rem 1rem;
            font-size: 0.88rem;
            border-radius: 9px;
        }

        .btn-lg {
            padding: 0.8rem 2rem;
            font-size: 1.05rem;
            border-radius: 13px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: linear-gradient(180deg, rgba(4, 8, 16, 0.88) 0%, rgba(6, 12, 24, 0.72) 100%);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--stroke-soft);
            background-clip: padding-box;
        }

        .navbar {
            padding-top: 0.6rem;
            padding-bottom: 0.6rem;
        }

        .navbar-brand {
            font-size: 1.05rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            line-height: 1.4;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0;
            margin-right: 2.4rem;
            white-space: nowrap;
        }

        .navbar-brand i {
            color: var(--brand);
            font-size: 1.3rem;
            filter: drop-shadow(0 0 8px rgba(47, 167, 255, 0.5));
        }

        .navbar-brand:hover {
            color: #fff;
        }

        .navbar-nav {
            gap: 0.4rem;
            align-items: center;
        }

        .nav-link {
            color: var(--text-sub) !important;
            font-weight: 500;
            font-size: 0.96rem;
            padding: 0.55rem 1rem !important;
            border-radius: 9px;
            position: relative;
        }

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

        .nav-link.active {
            color: #fff !important;
            font-weight: 600;
            background: rgba(47, 167, 255, 0.12);
            box-shadow: inset 0 0 0 1px rgba(47, 167, 255, 0.2);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: 3px;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--brand);
        }

        .nav-cta {
            margin-left: 0.35rem;
        }

        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 160px 0 90px;
            position: relative;
            overflow: hidden;
            background:
                linear-gradient(120deg, rgba(4, 8, 15, 0.96) 0%, rgba(7, 16, 29, 0.92) 42%, rgba(13, 31, 54, 0.84) 100%),
                url("/assets/images/backpic/back-1.png") no-repeat 88% 20% / auto 110%;
        }

        .hero-section::before {
            content: "";
            position: absolute;
            top: 0;
            right: -6%;
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(47, 167, 255, 0.24) 0%, transparent 68%);
            pointer-events: none;
            border-radius: 50%;
        }

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

        .hero-copy .hero-eyebrow {
            display: inline-block;
            background: rgba(47, 167, 255, 0.14);
            border: 1px solid rgba(47, 167, 255, 0.3);
            color: var(--brand-light);
            border-radius: var(--radius-pill);
            padding: 0.3rem 0.9rem;
            font-size: 0.84rem;
            letter-spacing: 0.03em;
            margin-bottom: 1.3rem;
        }

        .hero-copy .display-title {
            margin-bottom: 1.4rem;
            max-width: 660px;
        }

        .hero-copy .lead-text {
            font-size: 1.08rem;
            color: var(--text-sub);
            line-height: 1.85;
            max-width: 560px;
            margin-bottom: 1.8rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.9rem;
            margin-bottom: 2rem;
        }

        .trust-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem 1.2rem;
            font-size: 0.85rem;
            color: var(--text-weak);
            padding-top: 1rem;
            border-top: 1px solid var(--stroke-soft);
            max-width: 560px;
        }

        .trust-row i {
            color: var(--accent);
            margin-right: 6px;
        }

        .hero-visual {
            position: relative;
            z-index: 2;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 480px;
        }

        .device-frame {
            position: relative;
            width: 100%;
            max-width: 500px;
            margin-left: auto;
            border-radius: 32px;
            padding: 12px;
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--stroke);
            box-shadow: 0 36px 80px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
        }

        .device-frame .device-screen {
            border-radius: 22px;
            overflow: hidden;
            background: #0a1424;
            position: relative;
            border: 1px solid rgba(255, 255, 255, 0.07);
        }

        .device-frame img {
            width: 100%;
            object-fit: cover;
            min-height: 300px;
            opacity: 0.9;
        }

        .device-screen::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(200deg, rgba(47, 167, 255, 0.12), transparent 50%, rgba(0, 224, 212, 0.05));
            pointer-events: none;
        }

        .visual-float {
            position: absolute;
            left: -28px;
            bottom: 42px;
            border-radius: 16px;
            background: rgba(13, 24, 40, 0.78);
            backdrop-filter: blur(18px);
            border: 1px solid var(--stroke);
            padding: 0.85rem 1.05rem;
            display: flex;
            gap: 0.7rem;
            align-items: center;
            max-width: 260px;
            box-shadow: var(--shadow-card);
            color: var(--text-main);
            font-weight: 600;
            font-size: 0.9rem;
            z-index: 3;
        }

        .visual-float small {
            font-weight: 400;
            color: var(--text-sub);
            display: block;
            font-size: 0.78rem;
            line-height: 1.5;
        }

        .visual-float .mini-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(145deg, rgba(47, 167, 255, 0.25), rgba(0, 224, 212, 0.18));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.05rem;
            border: 1px solid rgba(47, 167, 255, 0.24);
        }

        .hero-data-strip {
            position: absolute;
            right: 8px;
            top: 48px;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .hero-data-strip .data-pill {
            background: rgba(10, 18, 35, 0.7);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 999px;
            padding: 0.35rem 0.9rem;
            font-size: 0.78rem;
            color: var(--text-sub);
        }

        .section-features {
            background: linear-gradient(180deg, #050A13 0%, #0B1727 100%);
        }

        .feature-card {
            background: var(--glass);
            border: 1px solid var(--stroke-soft);
            border-radius: var(--radius-card);
            padding: 2rem 1.6rem 1.7rem;
            height: 100%;
            backdrop-filter: blur(14px);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(255, 255, 255, 0.2);
        }

        .feature-card.core {
            border-color: rgba(47, 167, 255, 0.45);
            background: linear-gradient(155deg, rgba(47, 167, 255, 0.14), rgba(255, 255, 255, 0.04) 55%);
            box-shadow: var(--glow-primary), var(--shadow-card);
        }

        .feature-card.core:hover {
            box-shadow: 0 0 0 1px rgba(47, 167, 255, 0.35), 0 24px 56px rgba(47, 167, 255, 0.22), var(--shadow-card);
        }

        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            background: rgba(47, 167, 255, 0.14);
            border: 1px solid rgba(47, 167, 255, 0.22);
            color: var(--brand-light);
            margin-bottom: 1.2rem;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
        }

        .core .feature-icon {
            background: linear-gradient(145deg, rgba(47, 167, 255, 0.24), rgba(0, 224, 212, 0.18));
            color: var(--accent);
            border-color: rgba(0, 224, 212, 0.32);
        }

        .feature-card h3 {
            font-size: 1.1rem;
            margin-bottom: 0.75rem;
            font-weight: 700;
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-sub);
            line-height: 1.75;
            margin-bottom: 1.2rem;
        }

        .feature-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--brand-light);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        .feature-link i {
            transition: transform 0.25s ease;
        }

        .feature-link:hover i {
            transform: translateX(4px);
        }

        .feature-card.core .feature-link {
            color: var(--accent);
        }

        .feature-divider {
            display: flex;
            align-items: center;
            gap: 0.7rem;
            color: var(--text-weak);
            font-size: 0.8rem;
            margin-top: 0.4rem;
        }

        .feature-divider::before,
        .feature-divider::after {
            content: "";
            flex: 1;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--stroke), transparent);
        }

        .section-steps {
            background: linear-gradient(170deg, #0B1727 0%, #08121F 60%, #0A1626 100%);
        }

        .step-panel {
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.035);
            border: 1px solid var(--stroke-soft);
            padding: 1.8rem;
            position: relative;
        }

        .step-item {
            position: relative;
            padding: 0 0 1.8rem 3rem;
        }

        .step-item:not(:last-child) {
            border-left: 1px dashed rgba(255, 255, 255, 0.16);
            left: 14px;
        }

        .step-number {
            position: absolute;
            left: -13px;
            top: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: linear-gradient(145deg, #2FA7FF, #1570c8);
            color: #fff;
            font-size: 0.78rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 0 4px #0a1626, 0 0 20px rgba(47, 167, 255, 0.5);
        }

        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.2rem;
        }

        .step-item p {
            font-size: 0.89rem;
            margin-bottom: 0;
            color: var(--text-weak);
        }

        .process-visual {
            background: rgba(255, 255, 255, 0.035);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--stroke-soft);
            position: relative;
            min-height: 400px;
            display: flex;
            align-items: flex-end;
        }

        .process-visual::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url("/assets/images/backpic/back-2.png") center center / cover no-repeat;
            opacity: 0.5;
        }

        .process-visual::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 13, 24, 0.28), rgba(5, 10, 20, 0.72));
        }

        .process-visual-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 1.8rem;
        }

        .process-mini-list {
            background: rgba(8, 15, 28, 0.75);
            backdrop-filter: blur(18px);
            border: 1px solid var(--stroke);
            border-radius: 18px;
            padding: 1.2rem 1.4rem;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }

        .process-mini-list .mini-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--text-main);
            font-size: 0.9rem;
            font-weight: 600;
        }

        .process-mini-list .mini-item i {
            width: 24px;
            color: var(--accent);
            text-align: center;
        }

        .process-mini-list small {
            color: var(--text-weak);
            font-weight: 400;
            margin-left: auto;
        }

        .section-notice {
            background: linear-gradient(180deg, #0A1626 0%, #0C1B2E 100%);
        }

        .rule-panel {
            border-radius: var(--radius-card);
            padding: 1.6rem 1.5rem;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--stroke-soft);
            margin-bottom: 1.25rem;
            display: flex;
            gap: 1rem;
            transition: all 0.3s ease;
        }

        .rule-panel:hover {
            border-color: rgba(255, 255, 255, 0.2);
        }

        .rule-panel .status-icon {
            width: 46px;
            height: 46px;
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex: 0 0 auto;
        }

        .rule-panel.info .status-icon {
            background: rgba(47, 167, 255, 0.14);
            color: var(--brand-light);
            border: 1px solid rgba(47, 167, 255, 0.2);
        }

        .rule-panel.warning .status-icon {
            background: rgba(245, 166, 35, 0.14);
            color: #FFC978;
            border: 1px solid rgba(245, 166, 35, 0.24);
        }

        .rule-panel .status-title {
            font-weight: 700;
            margin-bottom: 0.3rem;
        }

        .rule-panel p {
            margin: 0;
            font-size: 0.9rem;
            line-height: 1.8;
            color: var(--text-sub);
        }

        .section-social {
            background: linear-gradient(170deg, #0C1B2E 0%, #08111F 100%);
        }

        .metric-card {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid var(--stroke-soft);
            border-radius: var(--radius-card);
            padding: 1.6rem 1.2rem;
            text-align: center;
            height: 100%;
            backdrop-filter: blur(12px);
            transition: all 0.3s ease;
        }

        .metric-card:hover {
            border-color: rgba(47, 167, 255, 0.24);
            transform: translateY(-4px);
        }

        .metric-icon {
            font-size: 1.7rem;
            color: var(--accent);
            margin-bottom: 0.8rem;
        }

        .metric-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.25rem;
        }

        .metric-card p {
            font-size: 0.88rem;
            color: var(--text-weak);
            margin: 0;
        }

        .testimonial-card {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid var(--stroke-soft);
            border-radius: var(--radius-card);
            padding: 1.6rem;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            backdrop-filter: blur(12px);
        }

        .testimonial-card p {
            font-size: 0.95rem;
            line-height: 1.85;
            margin-bottom: 1.2rem;
        }

        .testimonial-card .quote-label {
            color: var(--text-weak);
            font-size: 0.82rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .testimonial-card .quote-label i {
            color: var(--brand);
        }

        .section-news {
            background: linear-gradient(180deg, #08111F 0%, #0A1728 100%);
        }

        .news-card {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid var(--stroke-soft);
            border-radius: 18px;
            overflow: hidden;
            height: 100%;
            backdrop-filter: blur(10px);
            display: flex;
            flex-direction: column;
            transition: all 0.3s ease;
        }

        .news-card:hover {
            transform: translateY(-5px);
            border-color: rgba(47, 167, 255, 0.28);
            box-shadow: 0 18px 44px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(47, 167, 255, 0.08);
        }

        .news-thumb {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: linear-gradient(135deg, rgba(47, 167, 255, 0.25), rgba(0, 224, 212, 0.15));
        }

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

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

        .news-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(5, 9, 16, 0) 45%, rgba(5, 9, 16, 0.5));
        }

        .news-thumb .thumb-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            background: rgba(10, 18, 30, 0.82);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-radius: 999px;
            padding: 0.2rem 0.75rem;
            font-size: 0.75rem;
            color: #fff;
        }

        .news-body {
            padding: 1.2rem 1.25rem 1.4rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-meta {
            font-size: 0.78rem;
            color: var(--text-weak);
            display: flex;
            justify-content: space-between;
            gap: 8px;
            margin-bottom: 0.55rem;
        }

        .news-title {
            font-size: 1.02rem;
            line-height: 1.5;
            font-weight: 700;
            margin-bottom: 0.45rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-title a {
            color: var(--text-main);
        }

        .news-title a:hover {
            color: var(--brand-light);
        }

        .news-excerpt {
            color: var(--text-weak);
            font-size: 0.88rem;
            margin-bottom: 0.9rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.7;
        }

        .news-link {
            margin-top: auto;
            font-size: 0.86rem;
            font-weight: 600;
            color: var(--brand-light);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        .news-link i {
            transition: transform 0.25s ease;
        }

        .news-link:hover {
            color: #fff;
        }

        .news-link:hover i {
            transform: translateX(4px);
        }

        .empty-state {
            border: 1px dashed rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.03);
            border-radius: 18px;
            padding: 3rem 2rem;
            text-align: center;
        }

        .empty-state p {
            margin-bottom: 1rem;
        }

        .section-faq {
            background: linear-gradient(180deg, #0A1728 0%, #0D1B2E 100%);
        }

        .faq-accordion .accordion-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--stroke-soft);
            border-radius: 14px;
            margin-bottom: 0.9rem;
            overflow: hidden;
            backdrop-filter: blur(12px);
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 0.98rem;
            padding: 1.05rem 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            box-shadow: none;
            border: none;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(47, 167, 255, 0.08);
            color: #fff;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: inset 0 0 0 2px rgba(47, 167, 255, 0.35);
        }

        .faq-accordion .accordion-button::after {
            display: none;
        }

        .faq-chevron {
            margin-left: auto;
            color: var(--text-weak);
            transition: transform 0.3s ease;
            font-size: 0.85rem;
        }

        .accordion-button:not(.collapsed) .faq-chevron {
            transform: rotate(180deg);
            color: var(--brand-light);
        }

        .faq-q-icon {
            background: rgba(47, 167, 255, 0.12);
            border-radius: 50%;
            width: 30px;
            height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 800;
            color: var(--brand-light);
            flex: 0 0 auto;
        }

        .faq-accordion .accordion-body {
            color: var(--text-sub);
            font-size: 0.94rem;
            padding: 0.2rem 1.4rem 1.35rem 1.4rem;
            line-height: 1.85;
        }

        .faq-body-text {
            padding-left: 44px;
            color: var(--text-sub);
            font-size: 0.94rem;
            line-height: 1.85;
        }

        .final-cta-section {
            background: linear-gradient(180deg, #0D1B2E 0%, #07101D 100%);
            padding-bottom: calc(var(--section-space) + 30px);
        }

        .final-cta-inner {
            position: relative;
            border-radius: 24px;
            padding: 3rem 2rem;
            text-align: center;
            background:
                linear-gradient(140deg, rgba(47, 167, 255, 0.18), rgba(255, 255, 255, 0.03) 48%, rgba(0, 224, 212, 0.1)),
                rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(47, 167, 255, 0.25);
            backdrop-filter: blur(18px);
            box-shadow: 0 10px 50px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.16);
            overflow: hidden;
        }

        .final-cta-inner::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -60px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(0, 224, 212, 0.2), transparent 68%);
        }

        .final-cta-inner h2 {
            font-size: clamp(1.5rem, 3vw, 2.1rem);
            margin-bottom: 0.8rem;
        }

        .final-cta-inner p {
            color: var(--text-sub);
            max-width: 540px;
            margin: 0 auto 1.8rem;
        }

        .site-footer {
            background: linear-gradient(180deg, #050A13, #05080F);
            border-top: 1px solid rgba(47, 167, 255, 0.15);
            position: relative;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: -1px;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(47, 167, 255, 0.45), transparent);
        }

        .footer-grid {
            padding: 3.5rem 0 2rem;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 2rem;
            border-bottom: 1px solid var(--stroke-soft);
        }

        .footer-brand {
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.8rem;
        }

        .footer-brand i {
            color: var(--brand);
        }

        .footer-about {
            color: var(--text-weak);
            font-size: 0.88rem;
            line-height: 1.85;
            max-width: 340px;
            margin-bottom: 0;
        }

        .footer-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 1rem;
        }

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

        .footer-grid li {
            margin-bottom: 0.55rem;
        }

        .footer-grid a {
            color: var(--text-weak);
            font-size: 0.88rem;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .footer-grid a:hover {
            color: var(--brand-light);
            padding-left: 4px;
        }

        .footer-bottom {
            padding: 1.3rem 0;
            font-size: 0.8rem;
            color: var(--text-weak);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 0.5rem;
        }

        .footer-bottom a {
            color: #7d91aa;
        }

        .bottom-convert {
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 1040;
            background: rgba(5, 10, 18, 0.9);
            backdrop-filter: blur(20px);
            border-top: 1px solid var(--stroke);
            padding: 0.6rem 0;
            transform: translateY(120%);
            opacity: 0;
            transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.35s ease;
            pointer-events: none;
        }

        .bottom-convert.show {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .bottom-convert .convert-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .bottom-convert .convert-text {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: var(--text-main);
        }

        .bottom-convert .convert-text i {
            color: var(--accent);
        }

        .bottom-convert .convert-action {
            display: flex;
            gap: 0.6rem;
            align-items: center;
        }

        .bottom-convert .close-btn {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--stroke-soft);
            color: #fff;
            border-radius: 50%;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            cursor: pointer;
            transition: background 0.25s ease;
        }

        .bottom-convert .close-btn:hover {
            background: rgba(255, 255, 255, 0.16);
        }

        .bottom-convert.force-hide {
            transform: translateY(120%) !important;
            opacity: 0 !important;
            pointer-events: none !important;
        }

        .backdrop-blur {
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
        }

        @media (min-width: 992px) {
            .navbar-expand-lg .navbar-nav .nav-link {
                padding-left: 0.95rem;
                padding-right: 0.95rem;
            }
        }

        @media (min-width: 1200px) {
            .hero-section {
                padding-top: 150px;
                padding-bottom: 110px;
            }
        }

        @media (min-width: 992px) and (max-width: 1199px) {
            .hero-visual {
                min-height: 420px;
            }
            .device-frame {
                max-width: 440px;
            }
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(6, 11, 20, 0.95);
                backdrop-filter: blur(20px);
                border: 1px solid var(--stroke);
                border-radius: 16px;
                padding: 1rem;
                margin-top: 0.6rem;
            }
            .navbar-nav {
                align-items: flex-start;
                width: 100%;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 0.6rem;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
            }
            .hero-section {
                padding-top: 140px;
                padding-bottom: 80px;
            }
            .hero-visual {
                min-height: auto;
                margin-top: 2.5rem;
                justify-content: center;
            }
            .device-frame {
                max-width: 420px;
                margin-left: auto;
                margin-right: auto;
            }
            .visual-float {
                left: -12px;
                bottom: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand-col {
                grid-column: 1 / -1;
            }
            .bottom-convert .convert-wrap {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 767px) {
            .hero-section {
                padding-top: 118px;
                padding-bottom: 60px;
                background:
                    linear-gradient(120deg, rgba(4, 8, 15, 0.96) 0%, rgba(7, 16, 29, 0.92) 52%, rgba(13, 31, 54, 0.84) 100%),
                    url("/assets/images/backpic/back-1.png") no-repeat 80% 10% / cover;
            }
            .hero-copy .display-title {
                font-size: clamp(1.75rem, 6.5vw, 2.4rem);
            }
            .trust-row span {
                font-size: 0.78rem;
            }
            .visual-float {
                max-width: 230px;
                left: 0;
            }
            .section-steps .process-visual {
                min-height: 280px;
                margin-top: 2rem;
            }
            .rule-panel {
                flex-wrap: wrap;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.4rem;
            }
            .footer-brand-col {
                grid-column: auto;
            }
            .bottom-convert {
                padding: 0.55rem 0;
            }
            .bottom-convert .convert-text {
                font-size: 0.78rem;
                flex: 1;
                min-width: 0;
                overflow: hidden;
                white-space: nowrap;
                text-overflow: ellipsis;
            }
            .bottom-convert .btn {
                font-size: 0.82rem;
                padding: 0.42rem 0.8rem;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .nav-cta .btn-sm {
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .feature-card {
                padding: 1.5rem 1.2rem;
            }
            .final-cta-inner {
                padding: 2.2rem 1.2rem;
            }
            .final-cta-inner .btn {
                width: 100%;
            }
            .bottom-convert .convert-action .btn {
                white-space: nowrap;
                padding: 0.38rem 0.65rem;
            }
        }

        @media (max-width: 400px) {
            .navbar-brand {
                font-size: 0.9rem;
            }
            .hero-data-strip {
                display: none;
            }
        }

/* roulang page: category1 */
:root {
            --bg-0: #060B14;
            --bg-1: #0A1322;
            --brand-1: #2FA7FF;
            --brand-2: #0D6FB8;
            --accent: #00E0D4;
            --warn: #FFB65C;
            --warn-border: rgba(255, 182, 92, .35);
            --text-1: #F1F7FF;
            --text-2: #9FB0C7;
            --text-3: #5E7188;
            --glass: rgba(255, 255, 255, .06);
            --glass-strong: rgba(255, 255, 255, .09);
            --line: rgba(255, 255, 255, .12);
            --line-blue: rgba(47, 167, 255, .45);
            --radius-card: 18px;
            --radius-btn: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 18px 38px rgba(0, 0, 0, .28), inset 0 1px 0 rgba(255, 255, 255, .06);
            --shadow-btn: 0 0 0 1px rgba(255, 255, 255, .12), 0 15px 34px rgba(13, 111, 184, .35), 0 0 38px rgba(47, 167, 255, .25);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-size: 1rem;
            line-height: 1.75;
            font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            color: var(--text-1);
            background:
                radial-gradient(1100px 500px at 85% -10%, rgba(47, 167, 255, .22), transparent 60%),
                radial-gradient(900px 460px at -10% 20%, rgba(0, 224, 212, .12), transparent 50%),
                linear-gradient(180deg, #060B14 0%, #0A1322 55%, #060B14 100%);
            background-attachment: fixed;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--brand-1);
            text-decoration: none;
            transition: color .2s ease, border-color .2s ease, background .2s ease;
        }

        a:hover {
            color: #6FC7FF;
        }

        img {
            max-width: 100%;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .text-weak {
            color: var(--text-3) !important;
        }

        .text-mid {
            color: var(--text-2) !important;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1040;
            background: transparent;
            transition: background .35s ease, border-color .35s ease, box-shadow .35s ease;
        }

        .site-header .navbar {
            min-height: 72px;
            padding: 9px 0;
            transition: min-height .3s ease;
        }

        .site-header.scrolled {
            background: rgba(6, 11, 20, .82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--line);
            box-shadow: 0 8px 30px rgba(0, 0, 0, .25);
        }

        .site-header.scrolled .navbar {
            min-height: 62px;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.12rem;
            letter-spacing: .5px;
            color: var(--text-1);
            line-height: 1.3;
        }

        .navbar-brand i {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(145deg, #2FA7FF, #0D6FB8);
            border-radius: 10px;
            color: #fff;
            font-size: 1rem;
            box-shadow: var(--shadow-btn);
        }

        .navbar-brand:hover,
        .navbar-brand:focus {
            color: #fff;
        }

        .navbar .nav-link {
            padding: .62rem 1rem !important;
            margin-left: .2rem;
            margin-right: .2rem;
            font-size: .95rem;
            font-weight: 600;
            color: var(--text-2);
            border-radius: var(--radius-pill);
            position: relative;
            transition: color .25s ease, background .25s ease, transform .2s ease;
        }

        .navbar .nav-link:hover {
            color: var(--text-1);
            transform: translateY(-1px);
        }

        .navbar .nav-link.active {
            color: #fff;
            background: rgba(47, 167, 255, .14);
            box-shadow: inset 0 0 0 1px rgba(47, 167, 255, .25);
        }

        .navbar .nav-link.active::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 2px;
            width: 18px;
            height: 3px;
            transform: translateX(-50%);
            border-radius: var(--radius-pill);
            background: linear-gradient(90deg, var(--brand-1), var(--accent));
        }

        .nav-cta a {
            margin-left: 12px;
            white-space: nowrap;
        }

        .navbar-toggler {
            box-shadow: none !important;
        }

        .navbar-toggler:focus {
            outline: 2px solid rgba(47, 167, 255, .7);
            outline-offset: 2px;
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(8, 14, 26, .95);
                border: 1px solid var(--line);
                border-radius: 16px;
                padding: 18px;
                margin-top: 12px;
                box-shadow: 0 18px 40px rgba(0, 0, 0, .45);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
            }
            .navbar-collapse .navbar-nav {
                gap: 2px;
            }
            .navbar-collapse .nav-link {
                padding-left: 14px !important;
                border-radius: 10px;
            }
            .nav-cta {
                margin-top: 12px;
            }
            .nav-cta a {
                width: 100%;
            }
        }

        .btn {
            border-radius: var(--radius-btn);
            font-weight: 700;
            letter-spacing: .3px;
            transition: transform .25s cubic-bezier(.2, .8, .2, 1), box-shadow .25s ease, background .25s ease, border-color .25s ease;
            box-shadow: none;
        }

        .btn:hover,
        .btn:focus {
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn);
        }

        .btn-primary {
            background: linear-gradient(135deg, #2FA7FF 0%, #0D6FB8 100%);
            border: 1px solid rgba(255, 255, 255, .22);
            border-top-color: rgba(255, 255, 255, .42);
            color: #fff;
            text-shadow: 0 1px 2px rgba(0, 0, 0, .2);
        }

        .btn-outline-light {
            background: var(--glass);
            border: 1px solid var(--line);
            color: var(--text-1);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .btn-outline-light:hover {
            background: rgba(47, 167, 255, .15);
            border-color: var(--line-blue);
            color: #fff;
        }

        .btn-lg {
            padding: 12px 28px;
            font-size: 1rem;
        }

        .btn-sm {
            padding: 8px 18px;
            border-radius: 10px;
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        main {
            min-height: 70vh;
            padding-top: 72px;
        }

        .page-hero {
            position: relative;
            padding: 132px 0 64px;
            background-image:
                linear-gradient(100deg, rgba(6, 11, 20, .88) 20%, rgba(6, 11, 20, .55) 60%, rgba(6, 11, 20, .35) 100%),
                url('/assets/images/backpic/back-1.png');
            background-repeat: no-repeat;
            background-position: center right;
            background-size: cover;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .page-hero__inner {
            display: grid;
            grid-template-columns: 1.25fr .75fr;
            gap: 48px;
            align-items: center;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: .86rem;
            color: var(--text-3);
            margin-bottom: 24px;
        }

        .breadcrumb-nav a {
            color: var(--text-2);
        }

        .breadcrumb-nav a:hover {
            color: var(--brand-1);
        }

        .breadcrumb-nav .sep {
            color: rgba(255, 255, 255, .25);
        }

        .page-hero h1 {
            font-size: clamp(2rem, 4.6vw, 3.2rem);
            line-height: 1.2;
            letter-spacing: .5px;
            font-weight: 800;
            color: #fff;
            margin: 0 0 20px;
        }

        .page-hero__desc {
            font-size: 1.06rem;
            line-height: 1.85;
            color: var(--text-2);
            max-width: 640px;
            margin-bottom: 28px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-badges span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--glass);
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
            padding: 6px 14px;
            font-size: .85rem;
            color: var(--text-2);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

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

        .page-hero__media {
            display: block;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            transform: perspective(1000px) rotateY(-3deg) rotateX(1deg);
            transition: transform .4s ease, border-color .4s ease;
        }

        .page-hero__media:hover {
            transform: perspective(1000px) rotateY(0) rotateX(0);
            border-color: var(--line-blue);
        }

        .page-hero__media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        @media (max-width: 991px) {
            .page-hero {
                padding: 116px 0 46px;
            }
            .page-hero__inner {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .page-hero__media {
                max-width: 560px;
            }
        }

        .quick-anchor {
            padding: 28px 0;
            background: transparent;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }

        .quick-anchor__wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 14px;
        }

        .quick-anchor__label {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-3);
            font-size: .88rem;
            margin-right: 4px;
        }

        .quick-anchor__btn {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 11px 22px;
            border: 1px solid var(--line);
            background: var(--glass);
            border-radius: var(--radius-pill);
            color: var(--text-1);
            font-size: .92rem;
            font-weight: 600;
            transition: background .25s ease, border-color .25s ease, transform .2s ease, box-shadow .25s ease;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .quick-anchor__btn i {
            color: var(--brand-1);
        }

        .quick-anchor__btn:hover {
            background: rgba(47, 167, 255, .14);
            border-color: var(--line-blue);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(0, 0, 0, .25);
        }

        @media (max-width: 575px) {
            .quick-anchor__wrap {
                justify-content: flex-start;
                flex-direction: column;
                align-items: stretch;
            }
            .quick-anchor__btn {
                justify-content: center;
            }
        }

        .category-section {
            padding: 88px 0;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--brand-1);
            font-size: .84rem;
            font-weight: 600;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .section-head .section-label::before {
            content: "";
            display: block;
            width: 22px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin: 0 0 14px;
            position: relative;
            display: inline-block;
        }

        .section-head p {
            color: var(--text-2);
            max-width: 720px;
            line-height: 1.8;
            font-size: .98rem;
            margin: 0;
        }

        .version-card {
            height: 100%;
            border-radius: var(--radius-card);
            background: var(--glass);
            border: 1px solid var(--line);
            padding: 28px 26px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            transition: transform .3s ease, border-color .3s ease, background .3s ease;
            position: relative;
            overflow: hidden;
        }

        .version-card:hover {
            transform: translateY(-7px);
            border-color: var(--line-blue);
            background: rgba(255, 255, 255, .08);
        }

        .version-card__icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: linear-gradient(145deg, rgba(47, 167, 255, .25), rgba(13, 111, 184, .16));
            border: 1px solid rgba(47, 167, 255, .3);
            color: var(--brand-1);
            font-size: 1.25rem;
            margin-bottom: 22px;
        }

        .version-card h3 {
            font-size: 1.18rem;
            color: #fff;
            font-weight: 600;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .version-card p {
            color: var(--text-2);
            font-size: .95rem;
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .version-card__list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .version-card__list li {
            position: relative;
            padding-left: 22px;
            color: var(--text-2);
            font-size: .9rem;
            line-height: 1.7;
            margin-bottom: 6px;
        }

        .version-card__list li::before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 0;
            color: var(--accent);
            font-size: .78rem;
            line-height: 1.7;
        }

        .version-card__link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: .9rem;
            font-weight: 600;
            margin-top: 12px;
        }

        .version-grid-card {
            padding: 20px;
        }

        .check-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 44px;
            align-items: center;
        }

        .check-visual {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(255, 255, 255, .1);
        }

        .check-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            display: block;
        }

        .check-visual::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(6, 11, 20, .4));
            pointer-events: none;
        }

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

        .check-item {
            display: grid;
            grid-template-columns: 42px 1fr;
            gap: 14px;
            align-items: flex-start;
            background: rgba(255, 255, 255, .045);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 16px;
            padding: 18px 18px 18px 16px;
            transition: border-color .25s ease, background .25s ease, transform .2s ease;
        }

        .check-item:hover {
            border-color: rgba(47, 167, 255, .4);
            background: rgba(47, 167, 255, .07);
            transform: translateX(4px);
        }

        .check-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(47, 167, 255, .15);
            border: 1px solid rgba(47, 167, 255, .35);
            color: var(--brand-1);
            font-weight: 800;
            font-size: .9rem;
        }

        .check-item:nth-child(2) .check-num {
            background: rgba(0, 224, 212, .12);
            border-color: rgba(0, 224, 212, .3);
            color: var(--accent);
        }

        .check-item:nth-child(3) .check-num {
            background: rgba(255, 182, 92, .12);
            border-color: rgba(255, 182, 92, .3);
            color: var(--warn);
        }

        .check-content h3 {
            font-size: 1rem;
            color: #fff;
            font-weight: 600;
            margin: 0 0 4px;
        }

        .check-content p {
            font-size: .92rem;
            color: var(--text-2);
            line-height: 1.7;
            margin: 0;
        }

        @media (max-width: 991px) {
            .category-section {
                padding: 68px 0;
            }
            .check-intro {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .check-visual img {
                height: 300px;
            }
        }

        .warning-panel {
            border-radius: var(--radius-card);
            background: rgba(255, 182, 92, .08);
            border: 1px solid var(--warn-border);
            padding: 30px;
            display: grid;
            grid-template-columns: 44px 1fr;
            gap: 20px;
            box-shadow: 0 14px 34px rgba(0, 0, 0, .22);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .warning-panel__icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(255, 182, 92, .2);
            border: 1px solid rgba(255, 182, 92, .35);
            color: var(--warn);
            font-size: 1.1rem;
        }

        .warning-panel h2 {
            font-size: 1.25rem;
            color: #fff;
            font-weight: 600;
            margin: 0 0 10px;
            letter-spacing: .3px;
        }

        .warning-panel p {
            color: rgba(255, 255, 255, .68);
            font-size: .95rem;
            line-height: 1.8;
            margin: 0 0 14px;
        }

        .warning-panel ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 24px;
        }

        .warning-panel li {
            position: relative;
            padding-left: 22px;
            color: rgba(255, 255, 255, .72);
            font-size: .9rem;
            line-height: 1.7;
        }

        .warning-panel li::before {
            content: "\f071";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            font-size: .78rem;
            color: var(--warn);
        }

        @media (max-width: 575px) {
            .warning-panel {
                padding: 24px 20px;
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .warning-panel ul {
                flex-direction: column;
                gap: 4px;
            }
        }

        .cta-panel {
            margin: 0 0 90px;
            border-radius: var(--radius-card);
            padding: 60px 24px;
            text-align: center;
            background:
                radial-gradient(circle at 50% 120%, rgba(47, 167, 255, .3), transparent 75%),
                rgba(255, 255, 255, .05);
            border: 1px solid rgba(47, 167, 255, .25);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: 0 28px 60px rgba(0, 0, 0, .35), inset 0 1px 0 rgba(255, 255, 255, .08);
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            top: -1px;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(47, 167, 255, .8), transparent);
        }

        .cta-panel h2 {
            font-size: clamp(1.6rem, 3.4vw, 2.4rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin: 0 0 12px;
        }

        .cta-panel p {
            color: var(--text-2);
            font-size: 1rem;
            line-height: 1.8;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-panel .btn {
            margin: 0 8px 10px;
        }

        @media (max-width: 767px) {
            .cta-panel {
                padding: 44px 20px;
            }
            .cta-panel .btn {
                width: 100%;
                margin-left: 0;
                margin-right: 0;
            }
        }

        .site-footer {
            background: rgba(3, 7, 13, .95);
            border-top: 1px solid rgba(47, 167, 255, .25);
            box-shadow: inset 0 0 60px rgba(47, 167, 255, .04);
            color: var(--text-2);
            position: relative;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 224, 212, .6), transparent 70%);
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 44px;
            padding: 64px 0 40px;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.12rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .footer-brand i {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: linear-gradient(145deg, #2FA7FF, #0D6FB8);
            color: #fff;
            box-shadow: 0 0 22px rgba(47, 167, 255, .3);
        }

        .footer-about {
            color: var(--text-3);
            font-size: .9rem;
            line-height: 1.85;
            margin: 0;
            max-width: 340px;
        }

        .footer-title {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

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

        .site-footer li {
            margin-bottom: 8px;
        }

        .site-footer a {
            color: var(--text-2);
            font-size: .92rem;
            line-height: 1.6;
            position: relative;
            transition: color .2s ease, padding-left .2s ease;
        }

        .site-footer a:hover {
            color: var(--brand-1);
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 22px 0 28px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
            color: var(--text-3);
            font-size: .82rem;
        }

        @media (max-width: 991px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 575px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                padding: 46px 0 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: article */
:root {
            --bg:#060B14;
            --bg-2:#0A1322;
            --bg-3:#0E1B2E;
            --panel:rgba(255,255,255,0.06);
            --panel-strong:rgba(9,18,32,0.82);
            --stroke:rgba(255,255,255,0.12);
            --stroke-light:rgba(255,255,255,0.2);
            --text:#F1F7FF;
            --text-sec:#9FB0C7;
            --text-mut:#5E7188;
            --primary:#2FA7FF;
            --primary-2:#0D6FB8;
            --accent:#6DF0E0;
            --warn:#FFB45C;
            --danger:#F26D85;
            --radius-card:18px;
            --radius-btn:11px;
            --radius-panel:22px;
            --section-y:112px;
            --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
            --shadow-card:0 20px 50px rgba(0,0,0,0.28), inset 0 1px 0 rgba(255,255,255,0.05);
            --shadow-btn:0 10px 30px rgba(47,167,255,0.34);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font);
            font-size: 1rem;
            line-height: 1.75;
            color: var(--text);
            background:
                radial-gradient(1100px 560px at 12% -8%, rgba(47,167,255,0.13), transparent 65%),
                radial-gradient(1000px 520px at 108% 10%, rgba(0,224,212,0.08), transparent 60%),
                linear-gradient(180deg, #060B14 0%, #081123 48%, #05090F 100%);
            background-attachment: fixed;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: 0.3;
            background-image: radial-gradient(rgba(255,255,255,0.14) 0.6px, transparent 0.8px);
            background-size: 6px 6px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: #7CC7FF;
        }

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

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-space {
            padding-top: var(--section-y);
            padding-bottom: var(--section-y);
        }

        .text-weak {
            color: var(--text-mut);
        }

        .text-muted-custom {
            color: var(--text-sec);
        }

        ::selection {
            background: rgba(47,167,255,0.35);
            color: #fff;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ---------- Button system ---------- */
        .btn {
            --bs-btn-padding-y: .65rem;
            --bs-btn-padding-x: 1.25rem;
            --bs-btn-border-radius: var(--radius-btn);
            font-weight: 600;
            letter-spacing: .01em;
            border-radius: var(--radius-btn);
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
        }

        .btn-primary {
            background: linear-gradient(135deg, #2FA7FF 0%, #1478D3 52%, #0D6FB8 100%);
            border: 1px solid rgba(255,255,255,0.22);
            border-top-color: rgba(255,255,255,0.45);
            color: #fff;
            box-shadow: var(--shadow-btn), inset 0 1px 0 rgba(255,255,255,0.3);
            text-shadow: 0 1px 2px rgba(0,0,0,0.1);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: linear-gradient(135deg, #44B3FF 0%, #1B87E0 55%, #1476BE 100%);
            border-color: rgba(255,255,255,0.38);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 16px 42px rgba(47,167,255,0.48), inset 0 1px 0 rgba(255,255,255,0.38);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 6px 18px rgba(47,167,255,0.34);
        }

        .btn-soft {
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.18);
            color: var(--text);
            backdrop-filter: blur(8px);
            box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
        }

        .btn-soft:hover,
        .btn-soft:focus {
            background: rgba(255,255,255,0.13);
            border-color: rgba(47,167,255,0.55);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(0,0,0,0.22);
        }

        .btn-sm {
            padding: .45rem 1rem;
            font-size: .88rem;
            border-radius: 10px;
        }

        .btn-lg-cta {
            padding: .85rem 2rem;
            font-size: 1.02rem;
            border-radius: 13px;
        }

        /* ---------- Header / Nav ---------- */
        .site-header {
            position: fixed;
            left: 0;
            right: 0;
            top: 0;
            z-index: 1080;
            padding: 10px 0;
            transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
            border-bottom: 1px solid transparent;
        }

        .site-header.scrolled {
            background: rgba(5, 11, 21, 0.8);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom-color: rgba(255,255,255,0.08);
            box-shadow: 0 12px 40px rgba(0,0,0,0.28);
        }

        .navbar {
            padding-top: 0;
            padding-bottom: 0;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text);
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .navbar-brand i {
            color: var(--primary);
            font-size: 1.2rem;
            filter: drop-shadow(0 0 8px rgba(47,167,255,0.4));
        }

        .navbar-brand:hover {
            color: #fff;
        }

        .navbar-nav {
            gap: 6px;
        }

        .nav-link {
            padding: .52rem .85rem !important;
            color: var(--text-sec) !important;
            font-weight: 500;
            border-radius: 10px;
            position: relative;
            transition: color .2s ease, background .2s ease;
        }

        .nav-link:hover {
            color: #fff !important;
            background: rgba(255,255,255,0.06);
        }

        .nav-link.active {
            color: #fff !important;
            background: rgba(47,167,255,0.15);
            box-shadow: inset 0 0 0 1px rgba(47,167,255,0.15);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 4px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .nav-cta {
            margin-left: 8px;
        }

        .navbar-toggler {
            border-width: 1px;
            padding: .45rem .8rem;
        }

        .navbar-toggler:focus {
            box-shadow: none;
        }

        /* ---------- Article masthead ---------- */
        .article-banner {
            position: relative;
            padding: 146px 0 54px;
            background:
                radial-gradient(900px 400px at 10% 0%, rgba(47,167,255,0.18), transparent 55%),
                linear-gradient(180deg, rgba(5,10,18,0.4), rgba(6,11,20,0.94)),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .page-crumbs {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            margin: 0 0 18px;
            padding: 0;
            list-style: none;
            font-size: .88rem;
            color: var(--text-mut);
        }

        .page-crumbs li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .page-crumbs li+li::before {
            content: "/";
            color: rgba(255,255,255,0.24);
        }

        .page-crumbs a {
            color: var(--text-sec);
        }

        .page-crumbs a:hover {
            color: #fff;
        }

        .page-crumbs .current {
            color: var(--text);
            max-width: 380px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(47,167,255,0.13);
            border: 1px solid rgba(47,167,255,0.22);
            color: #B4E1FF;
            font-size: .82rem;
            font-weight: 600;
            letter-spacing: .04em;
        }

        .article-eyebrow i {
            color: var(--accent);
        }

        .article-banner h1 {
            margin: 21px 0 16px;
            max-width: 960px;
            font-size: clamp(1.9rem, 4.2vw, 3rem);
            font-weight: 800;
            line-height: 1.26;
            color: #fff;
            letter-spacing: -0.02em;
            text-wrap: balance;
        }

        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px 22px;
            margin-top: 8px;
            color: var(--text-sec);
            font-size: .9rem;
        }

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

        .article-meta-row i {
            color: var(--primary);
            width: 15px;
            text-align: center;
        }

        .meta-divider {
            width: 1px;
            height: 14px;
            background: rgba(255,255,255,0.18);
        }

        /* ---------- Article layout ---------- */
        .article-section {
            padding: var(--section-y) 0;
        }

        .article-detail-shell {
            max-width: 920px;
            margin: 0 auto;
        }

        .glass-card {
            background: rgba(10, 19, 33, 0.62);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-panel);
            box-shadow: var(--shadow-card), inset 0 0 0 1px rgba(255,255,255,0.03);
        }

        .article-holder {
            padding: clamp(1.5rem, 4vw, 3.2rem);
        }

        .not-found-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .not-found-panel p {
            color: var(--text-sec);
        }

        .cms-content {
            max-width: 800px;
            margin: 0 auto;
            color: var(--text);
            font-size: 1rem;
            line-height: 1.85;
            word-break: break-word;
        }

        .cms-content h1,
        .cms-content h2,
        .cms-content h3,
        .cms-content h4 {
            color: #fff;
            font-weight: 700;
            margin: 2.6rem 0 1.05rem;
            line-height: 1.4;
        }

        .cms-content h1 {
            font-size: 1.7rem;
        }

        .cms-content h2 {
            font-size: 1.45rem;
            padding-left: 14px;
            border-left: 3px solid var(--accent);
        }

        .cms-content h3 {
            font-size: 1.2rem;
        }

        .cms-content h4 {
            font-size: 1.05rem;
        }

        .cms-content p {
            color: #DBE6F5;
            margin-bottom: 1.2rem;
        }

        .cms-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        .cms-content ul,
        .cms-content ol {
            margin: 1rem 0 1.4rem 1.4rem;
            padding-left: .4rem;
        }

        .cms-content ul li,
        .cms-content ol li {
            margin-bottom: .55rem;
            color: #D4E2F3;
        }

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

        .cms-content ol li::marker {
            color: var(--accent);
            font-weight: 700;
        }

        .cms-content blockquote {
            margin: 2rem 0;
            padding: 1.1rem 1.4rem;
            background: rgba(47,167,255,0.08);
            border-left: 3px solid var(--primary);
            border-radius: 0 14px 14px 0;
            color: #C9DDF2;
            font-size: .96rem;
        }

        .cms-content img {
            margin: 1.8rem auto;
            border-radius: 16px;
            box-shadow: 0 16px 40px rgba(0,0,0,0.32);
        }

        .cms-content pre {
            background: #050A12;
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 14px;
            padding: 1.2rem 1.4rem;
            overflow-x: auto;
            color: #C7F5FF;
            line-height: 1.6;
            margin: 1.6rem 0;
        }

        .cms-content code {
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
            font-size: .92em;
            color: #9FE9FF;
            background: rgba(255,255,255,0.07);
            border-radius: 5px;
            padding: .15rem .4rem;
        }

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

        .cms-content table {
            max-width: 100%;
            margin: 2rem 0;
            width: 100%;
            border-collapse: collapse;
            border-radius: 12px;
            overflow: hidden;
            display: block;
            overflow-x: auto;
        }

        .cms-content table th,
        .cms-content table td {
            padding: .75rem 1rem;
            border: 1px solid rgba(255,255,255,0.12);
            text-align: left;
            white-space: nowrap;
        }

        .cms-content table th {
            background: rgba(47,167,255,0.17);
            color: #fff;
            font-weight: 700;
        }

        .cms-content hr {
            border-color: rgba(255,255,255,0.12);
            margin: 2.4rem 0;
            opacity: .5;
        }

        .cms-content strong {
            color: #fff;
            font-weight: 700;
        }

        /* ---------- Article tags ---------- */
        .article-tags-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin-top: 2.6rem;
            padding-top: 1.6rem;
            border-top: 1px solid rgba(255,255,255,0.09);
        }

        .article-tags-row .meta-label {
            color: var(--text-mut);
            font-size: .9rem;
            display: inline-flex;
            gap: 7px;
            align-items: center;
        }

        .article-tag {
            display: inline-block;
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.12);
            color: var(--text-sec);
            border-radius: 999px;
            padding: .25rem .8rem;
            font-size: .82rem;
            transition: all .2s ease;
        }

        .article-tag:hover {
            background: rgba(47,167,255,0.14);
            border-color: rgba(47,167,255,0.3);
            color: #fff;
        }

        /* ---------- Prev / Next ---------- */
        .prev-next-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
            margin-top: 34px;
        }

        .prev-next-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 1.1rem 1.25rem;
            border-radius: var(--radius-card);
            background: rgba(255,255,255,0.045);
            border: 1px solid rgba(255,255,255,0.1);
            color: var(--text);
            text-decoration: none;
            transition: transform .2s ease, border-color .2s ease, background .2s ease;
        }

        .prev-next-item:hover {
            transform: translateY(-3px);
            border-color: rgba(47,167,255,0.3);
            background: rgba(47,167,255,0.1);
            color: #fff;
        }

        .prev-next-item.next {
            text-align: right;
        }

        .prev-next-item small {
            color: var(--text-mut);
            font-size: .82rem;
        }

        .prev-next-item strong {
            font-size: .95rem;
            color: #DFEAFA;
            font-weight: 600;
            line-height: 1.5;
            display: block;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        /* ---------- Related / Guide ---------- */
        .related-guide-section {
            margin-top: 74px;
        }

        .section-heading {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 34px;
        }

        .section-heading h2 {
            margin: 0;
            font-size: clamp(1.45rem, 3vw, 2.1rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
        }

        .section-heading .lead-line {
            color: var(--text-sec);
            max-width: 520px;
            font-size: .95rem;
        }

        .section-title-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
            color: var(--accent);
            font-size: .86rem;
            font-weight: 600;
        }

        .section-title-badge i {
            background: rgba(109,240,224,0.14);
            border: 1px solid rgba(109,240,224,0.3);
            border-radius: 50%;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: .75rem;
        }

        .cover-corner {
            overflow: hidden;
        }

        .guide-card {
            display: block;
            position: relative;
            height: 100%;
            min-height: 240px;
            border-radius: var(--radius-card);
            background: #0C1A2B center center / cover no-repeat;
            padding: 1.5rem 1.5rem 1.35rem;
            text-decoration: none;
            border: 1px solid rgba(255,255,255,0.1);
            transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
            isolation: isolate;
        }

        .guide-card::before {
            content: "";
            position: absolute;
            inset: 0;
            z-index: -1;
            border-radius: inherit;
            background:
                linear-gradient(180deg, rgba(4,9,16,0.05) 0%, rgba(5,11,21,0.14) 30%, rgba(5,11,21,0.95) 100%),
                var(--bg);
            backdrop-filter: blur(1px);
        }

        .guide-card:hover {
            transform: translateY(-6px);
            border-color: rgba(47,167,255,0.28);
            box-shadow: 0 20px 46px rgba(0,0,0,0.36);
        }

        .guide-card .tag {
            display: inline-block;
            background: rgba(5,11,21,0.55);
            border: 1px solid rgba(255,255,255,0.14);
            color: var(--text);
            border-radius: 999px;
            font-size: .8rem;
            padding: .22rem .7rem;
            backdrop-filter: blur(6px);
        }

        .guide-card h3 {
            margin: 2rem 0 .5rem;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
        }

        .guide-card p {
            max-width: 400px;
            color: var(--text-sec);
            font-size: .93rem;
        }

        .guide-card .arrow-link {
            color: var(--primary);
            font-weight: 600;
            font-size: .9rem;
            margin-top: 14px;
        }

        .guide-card.style-one {
            background-image: url('/assets/images/coverpic/cover-1.png');
        }

        .guide-card.style-two {
            background-image: url('/assets/images/coverpic/cover-2.png');
        }

        .guide-card.style-three {
            background-image: url('/assets/images/coverpic/cover-3.webp');
        }

        /* ---------- Bottom CTA ---------- */
        .article-cta-zone {
            margin: 90px 0 0;
            background:
                radial-gradient(700px 300px at 0 120%, rgba(47,167,255,0.3), transparent 60%),
                radial-gradient(600px 300px at 100% 100%, rgba(109,240,224,0.18), transparent 58%),
                linear-gradient(135deg, rgba(9,20,36,0.98), rgba(7,14,25,0.98));
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: var(--radius-panel);
            overflow: hidden;
            padding: 3.2rem;
        }

        .article-cta-zone h2 {
            color: #fff;
            font-size: clamp(1.6rem, 3vw, 2.3rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .article-cta-zone p {
            color: var(--text-sec);
            max-width: 620px;
            margin-bottom: 24px;
        }

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

        /* ---------- Section separators ---------- */
        .section-divider {
            border-top: 1px solid rgba(255,255,255,0.06);
        }

        /* ---------- Footer ---------- */
        .site-footer {
            position: relative;
            margin-top: 110px;
            background: #050A12;
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 66px 0 30px;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(47,167,255,0.6), rgba(109,240,224,0.5), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.1fr;
            gap: 44px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }

        .footer-brand-col {
            max-width: 360px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 1.1rem;
            color: #fff;
            font-weight: 800;
            padding-bottom: 14px;
        }

        .footer-brand i {
            color: var(--primary);
        }

        .footer-about {
            color: var(--text-mut);
            font-size: .9rem;
            line-height: 1.7;
            max-width: 380px;
            margin: 0;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

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

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

        .site-footer ul a {
            color: var(--text-sec);
            font-size: .92rem;
            transition: color .2s ease, padding-left .2s ease;
        }

        .site-footer ul a:hover {
            color: var(--primary);
            padding-left: 3px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            color: var(--text-mut);
            font-size: .84rem;
            padding-top: 26px;
        }

        /* ---------- Mobile / responsive ---------- */
        @media (max-width: 991px) {
            :root {
                --section-y: 76px;
            }

            .site-header {
                padding: 8px 0;
            }

            .navbar-collapse {
                background: rgba(5, 11, 21, 0.96);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                border: 1px solid rgba(255,255,255,0.11);
                border-radius: 18px;
                padding: 14px 14px 18px;
                margin-top: 10px;
                box-shadow: 0 28px 60px rgba(0,0,0,0.45);
            }

            .nav-link.active::after {
                bottom: 2px;
            }

            .nav-cta {
                margin: 10px 0 0;
            }

            .nav-cta .btn {
                width: 100%;
            }

            .article-holder {
                padding: 1.4rem;
            }

            .prev-next-wrap {
                grid-template-columns: 1fr;
            }

            .article-cta-zone {
                padding: 2rem;
            }

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

        @media (max-width: 767px) {
            body {
                font-size: .96rem;
            }

            .article-banner {
                padding: 128px 0 40px;
            }

            .page-crumbs .current {
                max-width: 210px;
            }

            .article-banner h1 {
                font-size: 1.72rem;
                margin-top: 18px;
            }

            .article-meta-row {
                gap: 8px 16px;
                font-size: .84rem;
            }

            .meta-divider {
                display: none;
            }

            .section-heading {
                align-items: flex-start;
                flex-direction: column;
                gap: 8px;
                margin-bottom: 24px;
            }

            .guide-card {
                min-height: 210px;
            }

            .article-cta-zone {
                padding: 1.6rem;
                border-radius: 20px;
            }

            .article-cta-actions .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 28px;
            }

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

        @media (max-width: 480px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .article-holder {
                padding: 1.1rem;
            }

            .article-banner h1 {
                font-size: 1.5rem;
            }

            .navbar-brand {
                font-size: 1rem;
                gap: 7px;
            }

            .guide-card {
                min-height: 190px;
                padding: 1.2rem;
            }

            .guide-card h3 {
                margin-top: 1.2rem;
            }

            .prev-next-item {
                padding: .9rem 1rem;
            }

            .article-cta-zone h2 {
                font-size: 1.45rem;
            }
        }

/* roulang page: category2 */
:root{
            --bg:#060b14;
            --bg-2:#0a1322;
            --primary:#2fa7ff;
            --primary-deep:#0d6fb8;
            --cyan:#00e0d4;
            --cyan-soft:#6df0e0;
            --amber:#ffb570;
            --text:#f1f7ff;
            --text-2:#9fb0c7;
            --text-3:#5e7188;
            --line:rgba(255,255,255,.08);
            --card-bg:rgba(255,255,255,.055);
            --white-06:rgba(255,255,255,.06);
            --radius-card:20px;
            --radius-btn:12px;
            --shadow-card:0 24px 70px rgba(2,7,18,.35);
        }
        *{
            box-sizing:border-box;
        }
        html{
            scroll-behavior:smooth;
        }
        body{
            margin:0;
            font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
            background:
                radial-gradient(circle at 88% 4%, rgba(47,167,255,.12), transparent 26%),
                linear-gradient(180deg, #060b14 0%, #08101e 50%, #060b14 100%);
            background-attachment:fixed;
            color:var(--text);
            line-height:1.75;
            font-size:1rem;
            overflow-x:hidden;
        }
        a{
            text-decoration:none;
            color:inherit;
        }
        img{
            max-width:100%;
            display:block;
        }
        button, input, textarea{
            font-family:inherit;
        }
        .container{
            max-width:1200px;
            padding-left:24px;
            padding-right:24px;
        }
        .text-weak{
            color:var(--text-3);
        }

        /* header */
        .site-header{
            position:fixed;
            top:0;
            left:0;
            right:0;
            z-index:1000;
            transition:background .3s ease, box-shadow .3s ease;
            padding:10px 0;
        }
        .site-header.scrolled{
            background:rgba(6,11,20,.82);
            backdrop-filter:blur(16px);
            -webkit-backdrop-filter:blur(16px);
            border-bottom:1px solid rgba(255,255,255,.06);
            box-shadow:0 12px 38px rgba(0,0,0,.25);
        }
        .navbar{
            padding:0;
            min-height:68px;
        }
        .navbar .container{
            align-items:center;
        }
        .navbar-brand{
            display:inline-flex;
            align-items:center;
            gap:9px;
            font-weight:800;
            font-size:1.06rem;
            color:var(--text);
            letter-spacing:.5px;
            line-height:1.3;
            padding:0;
        }
        .navbar-brand i{
            color:var(--cyan);
            font-size:1.35rem;
            filter:drop-shadow(0 0 8px rgba(0,224,212,.55));
        }
        .navbar-brand:hover{
            color:#fff;
        }
        .navbar-nav{
            gap:4px;
        }
        .site-header .nav-link{
            color:var(--text-2);
            font-size:.96rem;
            font-weight:500;
            border-radius:10px;
            padding:.55rem .85rem !important;
            transition:color .2s ease, background .2s ease;
            position:relative;
        }
        .site-header .nav-link:hover{
            color:#fff;
        }
        .site-header .nav-link.active{
            color:var(--cyan);
            background:rgba(0,224,212,.08);
        }
        .site-header .nav-link.active::after{
            content:"";
            height:2px;
            width:22px;
            background:var(--cyan);
            border-radius:8px;
            display:block;
            margin:4px auto 0;
            box-shadow:0 0 10px rgba(0,224,212,.6);
        }
        .site-header .navbar-toggler:focus{
            box-shadow:none;
        }
        .nav-cta{
            display:flex;
            align-items:center;
            margin-left:8px;
        }

        /* buttons */
        .btn{
            border-radius:var(--radius-btn);
            font-weight:600;
            letter-spacing:.2px;
            transition:transform .25s ease, box-shadow .3s ease, border-color .25s ease, background .3s ease;
        }
        .btn-brand{
            background:linear-gradient(135deg, #2fa7ff 0%, #0d6fb8 100%);
            border:1px solid rgba(255,255,255,.25);
            box-shadow:0 0 22px rgba(47,167,255,.28), inset 0 1px 0 rgba(255,255,255,.35);
            color:#fff;
            border-radius:var(--radius-btn);
            padding:.64rem 1.45rem;
        }
        .btn-brand:hover{
            transform:translateY(-2px);
            box-shadow:0 0 34px rgba(47,167,255,.44), inset 0 1px 0 rgba(255,255,255,.4);
            color:#fff;
        }
        .btn-ghost{
            background:rgba(255,255,255,.06);
            border:1px solid rgba(255,255,255,.16);
            color:var(--text);
            border-radius:var(--radius-btn);
            padding:.64rem 1.45rem;
            box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
        }
        .btn-ghost:hover{
            border-color:rgba(47,167,255,.65);
            color:#fff;
            transform:translateY(-2px);
            background:rgba(255,255,255,.09);
            box-shadow:0 10px 30px rgba(2,10,22,.25);
        }
        .btn-sm{
            padding:.44rem 1.05rem;
            font-size:.9rem;
        }
        .btn:focus-visible,
        a:focus-visible,
        .accordion-button:focus-visible{
            outline:3px solid rgba(47,167,255,.55);
            outline-offset:3px;
        }

        /* page hero */
        .page-hero{
            padding:168px 0 84px;
            color:#fff;
            background-image:
                linear-gradient(90deg, rgba(6,11,20,.92) 0%, rgba(7,13,25,.78) 67%, rgba(9,21,38,.52) 100%),
                url("/assets/images/backpic/back-2.png");
            background-size:cover;
            background-position:center;
            position:relative;
            border-bottom:1px solid rgba(47,167,255,.16);
        }
        .page-hero::after{
            content:"";
            position:absolute;
            inset:auto 0 0;
            height:1px;
            background:linear-gradient(90deg, transparent, rgba(47,167,255,.6), transparent);
        }
        .breadcrumb-line{
            display:inline-flex;
            align-items:center;
            gap:10px;
            font-size:.86rem;
            background:rgba(255,255,255,.06);
            border:1px solid rgba(255,255,255,.1);
            border-radius:40px;
            padding:5px 15px;
            color:var(--text-2);
            backdrop-filter:blur(12px);
            margin-bottom:24px;
        }
        .breadcrumb-line i{
            color:var(--cyan);
            font-size:.7rem;
        }
        .breadcrumb-line a:hover{
            color:#fff;
        }
        .page-hero h1{
            font-size:clamp(2rem, 5vw, 3.1rem);
            font-weight:800;
            line-height:1.22;
            margin:0 0 22px;
            max-width:760px;
            letter-spacing:.2px;
        }
        .page-hero h1 span{
            color:transparent;
            background:linear-gradient(110deg,#6df0e0 10%,#2fa7ff 55%,#00e0d4 90%);
            -webkit-background-clip:text;
            background-clip:text;
        }
        .page-hero-lead{
            color:#c9d7ea;
            font-size:1.05rem;
            max-width:660px;
            margin-bottom:36px;
            line-height:1.9;
        }
        .hero-actions{
            display:flex;
            gap:14px;
            flex-wrap:wrap;
            margin-bottom:30px;
        }
        .info-panel-hero{
            background:rgba(255,255,255,.06);
            border:1px solid rgba(255,255,255,.12);
            border-radius:22px;
            padding:26px;
            backdrop-filter:blur(18px);
            -webkit-backdrop-filter:blur(18px);
            box-shadow:inset 0 1px 0 rgba(255,255,255,.08), var(--shadow-card);
            position:relative;
            overflow:hidden;
        }
        .info-panel-hero::before{
            content:"";
            position:absolute;
            width:150px;
            height:150px;
            left:-60px;
            top:-60px;
            background:rgba(47,167,255,.28);
            border-radius:50%;
            filter:blur(60px);
        }
        .info-panel-title{
            display:flex;
            align-items:center;
            gap:9px;
            font-weight:700;
            font-size:1.08rem;
            color:#eff8ff;
        }
        .info-panel-title i{
            color:var(--cyan);
        }
        .info-list-hero{
            list-style:none;
            padding:0;
            margin:20px 0 0;
            display:flex;
            flex-direction:column;
            gap:16px;
        }
        .info-list-hero li{
            display:flex;
            gap:12px;
            align-items:flex-start;
            border-bottom:1px dashed rgba(255,255,255,.08);
            padding-bottom:15px;
            font-size:.94rem;
        }
        .info-list-hero li:last-child{
            border-bottom:none;
            padding-bottom:0;
        }
        .info-list-hero .info-check{
            width:26px;
            height:26px;
            flex:none;
            display:flex;
            align-items:center;
            justify-content:center;
            border-radius:50%;
            color:#08101c;
            background:linear-gradient(135deg, #00e0d4, #2fa7ff);
            font-size:.78rem;
        }
        .info-list-hero strong{
            display:block;
            font-size:.98rem;
            color:#dfeaff;
        }
        .info-list-hero span{
            color:var(--text-2);
            font-size:.88rem;
        }

        /* section general */
        .section-pad{
            padding:96px 0;
        }
        .section-dark{
            background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.005));
            border-top:1px solid rgba(255,255,255,.04);
            border-bottom:1px solid rgba(255,255,255,.04);
        }
        .section-head{
            max-width:760px;
            margin-bottom:44px;
        }
        .section-eyebrow{
            display:inline-flex;
            align-items:center;
            gap:9px;
            font-size:.86rem;
            font-weight:600;
            color:var(--cyan);
            background:rgba(0,224,212,.07);
            border:1px solid rgba(0,224,212,.16);
            border-radius:30px;
            padding:4px 14px;
            margin-bottom:16px;
            letter-spacing:.3px;
        }
        .section-eyebrow i{
            font-size:.7rem;
        }
        .section-title{
            font-size:clamp(1.55rem, 3vw, 2rem);
            font-weight:700;
            margin:0;
            line-height:1.35;
            letter-spacing:.2px;
        }
        .section-desc{
            margin:12px 0 0;
            color:var(--text-2);
            font-size:.98rem;
            line-height:1.8;
        }
        .section-head.text-center{
            margin-left:auto;
            margin-right:auto;
        }

        /* glass cards */
        .glass-card{
            background:rgba(255,255,255,.055);
            border:1px solid rgba(255,255,255,.12);
            border-radius:20px;
            backdrop-filter:blur(14px);
            -webkit-backdrop-filter:blur(14px);
            box-shadow:inset 0 1px 0 rgba(255,255,255,.08), var(--shadow-card);
        }
        .glass-card:hover{
            border-color:rgba(47,167,255,.3);
        }

        /* group layout */
        .group-accordion{
            display:flex;
            flex-direction:column;
            gap:16px;
        }
        .accordion-item{
            background:transparent;
            border:1px solid rgba(255,255,255,.12);
            border-radius:18px !important;
            overflow:hidden;
            box-shadow:inset 0 1px 0 rgba(255,255,255,.05), 0 18px 40px rgba(2,7,18,.25);
        }
        .accordion-button{
            background:rgba(255,255,255,.045);
            color:var(--text);
            font-weight:600;
            font-size:1.05rem;
            padding:1rem 1.2rem;
            box-shadow:none;
            border:none;
        }
        .accordion-button::after{
            background-image:none;
            font-family:"Font Awesome 6 Free";
            font-weight:900;
            content:"\f063";
            color:var(--cyan);
            display:inline-flex;
            align-items:center;
            justify-content:center;
            width:2rem;
            height:2rem;
            transition:transform .3s;
        }
        .accordion-button:not(.collapsed){
            background:linear-gradient(135deg, rgba(47,167,255,.14), rgba(0,224,212,.05));
            color:#fff;
            box-shadow:none;
        }
        .accordion-button:not(.collapsed)::after{
            transform:rotate(180deg);
        }
        .accordion-button:focus{
            border-color:rgba(47,167,255,.4);
            box-shadow:none;
        }
        .accordion-body{
            background:rgba(6,11,20,.25);
            color:var(--text-2);
            padding:1.3rem 1.4rem 1.5rem;
            font-size:.95rem;
            line-height:1.85;
        }
        .accordion-body ul{
            margin:0;
            padding:0;
            list-style:none;
            display:flex;
            flex-direction:column;
            gap:13px;
        }
        .accordion-body ul li{
            position:relative;
            padding-left:2rem;
        }
        .accordion-body ul li::before{
            content:"\f058";
            font-family:"Font Awesome 6 Free";
            font-weight:400;
            color:var(--cyan);
            position:absolute;
            left:0;
            top:2px;
            font-size:.95rem;
        }
        .accordion-item:has(.accordion-button){
            transition:border-color .3s ease;
        }
        .accordion-item:hover{
            border-color:rgba(47,167,255,.32);
        }

        /* check side */
        .side-note-card{
            background:rgba(255,255,255,.055);
            border:1px solid rgba(255,255,255,.12);
            border-radius:20px;
            backdrop-filter:blur(14px);
            overflow:hidden;
            box-shadow:inset 0 1px 0 rgba(255,255,255,.07), var(--shadow-card);
            height:100%;
        }
        .side-note-body{
            padding:28px;
        }
        .side-note-title{
            display:flex;
            align-items:center;
            gap:10px;
            font-weight:700;
            margin-bottom:18px;
        }
        .side-note-title i{
            color:var(--cyan);
        }
        .check-line{
            display:flex;
            gap:11px;
            padding:10px 0;
            border-bottom:1px dashed rgba(255,255,255,.08);
            align-items:flex-start;
        }
        .check-line i{
            color:var(--cyan);
            margin-top:5px;
            font-size:.9rem;
            flex:none;
            width:18px;
        }
        .check-line p{
            margin:0;
            color:var(--text-2);
            font-size:.92rem;
        }
        .check-line strong{
            color:#dceaff;
            font-weight:600;
        }
        .side-media{
            position:relative;
            height:180px;
            overflow:hidden;
        }
        .side-media img{
            width:100%;
            height:100%;
            object-fit:cover;
            transform:scale(1.01);
            transition:transform .7s ease;
        }
        .side-note-card:hover .side-media img{
            transform:scale(1.08);
        }
        .side-media::after{
            content:"";
            position:absolute;
            inset:0;
            background:linear-gradient(180deg, transparent 40%, rgba(6,11,20,.35));
        }

        /* compare rows */
        .compare-list{
            display:flex;
            flex-direction:column;
            gap:18px;
        }
        .compare-row{
            background:rgba(255,255,255,.05);
            border:1px solid rgba(255,255,255,.09);
            border-radius:16px;
            padding:20px 22px;
            display:flex;
            align-items:center;
            gap:18px;
            flex-wrap:wrap;
            backdrop-filter:blur(8px);
            transition:transform .25s ease, border-color .3s ease;
        }
        .compare-row:hover{
            transform:translateY(-3px);
            border-color:rgba(47,167,255,.35);
        }
        .compare-icon{
            width:48px;
            height:48px;
            flex:none;
            border-radius:14px;
            display:flex;
            align-items:center;
            justify-content:center;
            font-size:1.25rem;
            color:#fff;
            background:linear-gradient(135deg, rgba(47,167,255,.15), rgba(0,224,212,.09));
            border:1px solid rgba(47,167,255,.25);
        }
        .compare-info{
            flex:1 1 180px;
            min-width:180px;
        }
        .compare-info strong{
            display:block;
            margin-bottom:4px;
        }
        .compare-info p{
            margin:0;
            color:var(--text-2);
            font-size:.9rem;
            line-height:1.7;
        }
        .stat-chip{
            flex:none;
            border-radius:40px;
            padding:6px 14px;
            font-size:.8rem;
            font-weight:600;
            border:1px solid;
        }
        .chip-official{
            color:var(--cyan);
            border-color:rgba(0,224,212,.35);
            background:rgba(0,224,212,.08);
        }
        .chip-normal{
            color:#b7c8de;
            border-color:rgba(255,255,255,.15);
            background:rgba(255,255,255,.05);
        }
        .chip-guard{
            color:var(--amber);
            border-color:rgba(255,181,112,.32);
            background:rgba(255,181,112,.08);
        }

        /* alert panel */
        .inform-bar{
            margin-top:30px;
            background:linear-gradient(120deg, rgba(255,181,112,.1), rgba(255,181,112,.035));
            border:1px solid rgba(255,181,112,.18);
            border-radius:18px;
            padding:20px 24px;
            display:flex;
            gap:16px;
            align-items:flex-start;
        }
        .inform-bar i{
            color:var(--amber);
            font-size:1.25rem;
            margin-top:3px;
        }
        .inform-bar p{
            margin:0;
            color:#d9c5b1;
            font-size:.93rem;
            line-height:1.8;
        }
        .inform-bar strong{
            color:#ffe5cd;
        }

        /* scene cards */
        .scene-card{
            background:rgba(255,255,255,.05);
            border:1px solid rgba(255,255,255,.1);
            border-radius:20px;
            padding:27px;
            height:100%;
            backdrop-filter:blur(14px);
            box-shadow:inset 0 1px 0 rgba(255,255,255,.06), 0 18px 45px rgba(2,7,18,.2);
            transition:transform .28s ease, border-color .3s ease;
            position:relative;
            overflow:hidden;
        }
        .scene-card::before{
            content:"";
            position:absolute;
            top:0;
            left:0;
            width:100%;
            height:2px;
            background:linear-gradient(90deg, transparent, rgba(0,224,212,.5), transparent);
            opacity:0;
            transition:opacity .3s;
        }
        .scene-card:hover{
            transform:translateY(-6px);
            border-color:rgba(47,167,255,.32);
        }
        .scene-card:hover::before{
            opacity:1;
        }
        .scene-index{
            display:inline-flex;
            align-items:center;
            justify-content:center;
            font-size:.85rem;
            font-weight:700;
            color:#08101c;
            width:34px;
            height:34px;
            border-radius:12px;
            background:linear-gradient(140deg, #00e0d4, #2fa7ff);
            margin-bottom:18px;
            box-shadow:0 6px 18px rgba(0,224,212,.25);
        }
        .scene-card h3{
            font-size:1.12rem;
            font-weight:700;
            margin-bottom:10px;
        }
        .scene-card p{
            color:var(--text-2);
            font-size:.93rem;
            margin:0 0 14px;
            line-height:1.8;
        }
        .scene-card ul{
            list-style:none;
            margin:0;
            padding:0;
            color:#b9cae2;
            font-size:.88rem;
        }
        .scene-card ul li{
            padding:4px 0 4px 1.6rem;
            position:relative;
        }
        .scene-card ul li::before{
            content:"\f105";
            font-family:"Font Awesome 6 Free";
            font-weight:900;
            color:var(--primary);
            position:absolute;
            left:0;
            top:4px;
        }
        .scene-link{
            display:inline-flex;
            align-items:center;
            gap:6px;
            font-size:.9rem;
            font-weight:600;
            color:var(--cyan);
            margin-top:12px;
            transition:gap .2s ease, color .2s ease;
        }
        .scene-link:hover{
            color:#fff;
            gap:10px;
        }

        /* FAQ */
        .faq-shell{
            max-width:880px;
            margin:0 auto;
            display:flex;
            flex-direction:column;
            gap:14px;
        }
        .faq-item{
            background:rgba(255,255,255,.045);
            border:1px solid rgba(255,255,255,.1);
            border-radius:18px;
            padding:22px 26px;
            backdrop-filter:blur(10px);
        }
        .faq-q{
            font-weight:700;
            font-size:.98rem;
            display:flex;
            justify-content:space-between;
            align-items:center;
            gap:20px;
            cursor:pointer;
            color:#e6f0ff;
            margin:0;
        }
        .faq-q i{
            color:var(--cyan);
            transition:transform .35s ease;
            flex:none;
        }
        .faq-item.active .faq-q i{
            transform:rotate(180deg);
        }
        .faq-a{
            max-height:0;
            overflow:hidden;
            transition:max-height .35s ease, padding .3s ease;
            color:var(--text-2);
            font-size:.93rem;
            line-height:1.8;
        }
        .faq-a div{
            padding-top:12px;
        }
        .faq-item.active .faq-a{
            max-height:360px;
        }
        .faq-tip{
            text-align:center;
            margin:28px auto 0;
            color:var(--text-2);
        }
        .faq-tip a{
            color:var(--cyan);
            font-weight:600;
        }
        .faq-tip a:hover{
            color:#fff;
        }

        /* endcta */
        .end-cta{
            position:relative;
            border-radius:28px;
            background:
                radial-gradient(circle at 70% 0%, rgba(47,167,255,.25), transparent 42%),
                rgba(255,255,255,.045);
            border:1px solid rgba(255,255,255,.15);
            padding:56px 40px;
            text-align:center;
            overflow:hidden;
            box-shadow:inset 0 1px 0 rgba(255,255,255,.1), 0 25px 70px rgba(2,7,18,.4);
        }
        .end-cta::before{
            content:"";
            position:absolute;
            inset:0;
            background:url("/assets/images/backpic/back-1.png") center/cover no-repeat;
            opacity:.08;
            z-index:0;
        }
        .end-cta .inner{
            position:relative;
            z-index:1;
        }
        .end-cta h2{
            font-size:clamp(1.45rem, 3vw, 2.2rem);
            font-weight:800;
            margin-bottom:14px;
        }
        .end-cta p{
            color:var(--text-2);
            max-width:640px;
            margin:0 auto 28px;
            font-size:.98rem;
            line-height:1.85;
        }
        .end-cta .hero-actions{
            justify-content:center;
            margin-bottom:0;
        }

        /* footer */
        .site-footer{
            margin-top:96px;
            background:#050912;
            border-top:1px solid rgba(47,167,255,.2);
            padding:58px 0 0;
            box-shadow:0 -18px 50px rgba(2,7,18,.3);
        }
        .footer-grid{
            display:grid;
            grid-template-columns:1.6fr 1fr 1fr 1.3fr;
            gap:38px;
            margin-bottom:46px;
        }
        .footer-brand{
            font-size:1.1rem;
            font-weight:800;
            display:flex;
            align-items:center;
            gap:8px;
            margin-bottom:14px;
        }
        .footer-brand i{
            color:var(--cyan);
            filter:drop-shadow(0 0 8px rgba(0,224,212,.4));
        }
        .footer-about{
            color:var(--text-2);
            font-size:.92rem;
            line-height:1.8;
            max-width:420px;
            margin:0;
        }
        .footer-title{
            font-weight:700;
            margin-bottom:16px;
            color:#e4f0ff;
            font-size:.98rem;
            display:flex;
            align-items:center;
            gap:8px;
        }
        .footer-title::before{
            content:"";
            width:4px;
            height:16px;
            border-radius:4px;
            background:linear-gradient(180deg, #00e0d4, #2fa7ff);
        }
        .site-footer ul{
            list-style:none;
            padding:0;
            margin:0;
            display:flex;
            flex-direction:column;
            gap:9px;
        }
        .site-footer ul li a,
        .site-footer ul li span{
            color:var(--text-2);
            font-size:.9rem;
            transition:color .25s, padding-left .25s;
        }
        .site-footer ul li a:hover{
            color:#fff;
            padding-left:5px;
        }
        .footer-bottom{
            border-top:1px solid rgba(255,255,255,.06);
            padding:18px 0;
            display:flex;
            justify-content:space-between;
            gap:12px;
            flex-wrap:wrap;
            color:var(--text-3);
            font-size:.84rem;
        }

        @media (max-width:991.98px){
            .section-pad{padding:68px 0;}
            .site-header{
                padding:6px 0;
            }
            .navbar-collapse{
                background:rgba(7,12,22,.94);
                border:1px solid rgba(255,255,255,.1);
                border-radius:16px;
                padding:12px;
                margin-top:10px;
                backdrop-filter:blur(18px);
            }
            .nav-cta{
                margin:8px 0 0;
            }
            .navbar-nav{
                gap:2px;
            }
            .page-hero{
                padding:150px 0 70px;
            }
            .footer-grid{
                grid-template-columns:1.5fr 1fr 1fr;
            }
        }
        @media (max-width:767.98px){
            .page-hero h1{
                font-size:1.8rem;
            }
            .footer-grid{
                grid-template-columns:1fr 1fr;
            }
            .section-pad{
                padding:56px 0;
            }
            .side-note-body{
                padding:20px;
            }
            .stat-chip{
                width:100%;
                text-align:center;
            }
            .compare-row{
                padding:16px;
            }
            .end-cta{
                padding:40px 18px;
            }
        }
        @media (max-width:575.98px){
            .container{
                padding-left:16px;
                padding-right:16px;
            }
            .page-hero-lead{
                font-size:.95rem;
            }
            .footer-grid{
                grid-template-columns:1fr 1fr;
                gap:28px 16px;
            }
            .footer-bottom{
                flex-direction:column;
                text-align:center;
            }
            .info-panel-hero{
                padding:20px;
            }
            .section-head{
                margin-bottom:30px;
            }
            .hero-actions .btn{
                width:100%;
                text-align:center;
            }
        }