/* roulang page: index */
:root {
            --ink: #08090f;
            --navy: #0d111e;
            --panel: #111827;
            --panel-soft: #151d2d;
            --blue: #0052ff;
            --cyan: #00f0ff;
            --cyan-soft: #8cf7ff;
            --white: #f8fbff;
            --muted: #aab5c8;
            --line: rgba(117, 148, 204, .22);
            --line-bright: rgba(0, 240, 255, .42);
            --gold: #f5c451;
            --danger: #ff5577;
            --radius-lg: 24px;
            --radius-md: 16px;
            --shadow: 0 22px 70px rgba(0, 0, 0, .34);
        }

        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--white);
            background:
                radial-gradient(circle at 78% 4%, rgba(0, 82, 255, .17), transparent 27rem),
                radial-gradient(circle at 6% 38%, rgba(0, 240, 255, .07), transparent 28rem),
                var(--ink);
            font-family: "Be Vietnam Pro", Arial, sans-serif;
            line-height: 1.65;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: .2;
            background-image: linear-gradient(rgba(0,240,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(0,240,255,.08) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: linear-gradient(to bottom, #000, transparent 85%);
        }
        a { color: inherit; text-decoration: none; }
        img { display: block; max-width: 100%; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        :focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }
        .container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 40;
            background: rgba(8, 9, 15, .82);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--line);
        }
        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 250px;
            font-family: "Space Grotesk", sans-serif;
            font-weight: 700;
            letter-spacing: -.03em;
        }
        .brand-mark {
            width: 40px;
            height: 40px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: linear-gradient(135deg, var(--cyan), var(--blue));
            clip-path: polygon(16% 0, 100% 0, 84% 100%, 0 100%);
            font-size: 20px;
            box-shadow: 0 0 22px rgba(0, 240, 255, .3);
        }
        .brand-text { max-width: 280px; font-size: 14px; line-height: 1.25; }
        .nav-links { display: flex; align-items: center; gap: 5px; }
        .nav-link {
            position: relative;
            padding: 10px 13px;
            color: var(--muted);
            font-size: 13px;
            font-weight: 600;
            transition: color .25s ease, background .25s ease;
        }
        .nav-link:hover, .nav-link.active { color: var(--white); background: rgba(0, 240, 255, .08); }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 13px;
            right: 13px;
            bottom: 3px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
        }
        .nav-actions { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
        .login-link { padding: 10px 9px; color: var(--muted); font-size: 13px; font-weight: 700; }
        .login-link:hover { color: var(--cyan); }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: var(--white);
            border: 1px solid var(--line);
            background: var(--panel);
            border-radius: 10px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 0 20px;
            border: 1px solid transparent;
            font-size: 13px;
            font-weight: 800;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
        }
        .btn:hover { transform: translateY(-2px); }
        .btn:active { transform: translateY(1px) scale(.98); }
        .btn-primary {
            color: #fff;
            background: linear-gradient(110deg, #0052ff, #008eff);
            box-shadow: 0 10px 28px rgba(0, 82, 255, .28);
            clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
        }
        .btn-primary:hover { box-shadow: 0 14px 36px rgba(0, 240, 255, .3); }
        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-bright);
            background: rgba(0, 240, 255, .04);
        }
        .btn-outline:hover { background: rgba(0, 240, 255, .12); }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--cyan);
            font-size: 11px;
            font-weight: 800;
            letter-spacing: .14em;
            text-transform: uppercase;
        }
        .eyebrow::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
        }
        .hero {
            position: relative;
            min-height: 690px;
            padding: 168px 0 86px;
            background:
                linear-gradient(90deg, rgba(8, 9, 15, .96) 0%, rgba(8, 9, 15, .72) 48%, rgba(8, 9, 15, .36) 100%),
                url("/assets/images/backpic/back-1.jpg") center/cover no-repeat;
            border-bottom: 1px solid var(--line);
        }
        .hero::after {
            content: "";
            position: absolute;
            inset: auto 0 0;
            height: 180px;
            background: linear-gradient(transparent, var(--ink));
            pointer-events: none;
        }
        .hero-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            align-items: end;
            gap: 58px;
        }
        .hero-copy h1 {
            max-width: 780px;
            margin: 20px 0 22px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(38px, 5.3vw, 72px);
            line-height: 1.04;
            letter-spacing: -.06em;
        }
        .hero-copy h1 span { color: var(--cyan); text-shadow: 0 0 22px rgba(0, 240, 255, .3); }
        .hero-copy p {
            max-width: 680px;
            margin: 0;
            color: #d4dbea;
            font-size: 17px;
            line-height: 1.75;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
        .hero-note { margin-top: 18px; color: var(--muted); font-size: 12px; }
        .hero-panel {
            position: relative;
            padding: 25px;
            background: linear-gradient(145deg, rgba(20, 31, 54, .92), rgba(10, 15, 28, .88));
            border: 1px solid var(--line-bright);
            box-shadow: var(--shadow), 0 0 35px rgba(0, 240, 255, .1);
            clip-path: polygon(0 14px, 14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
        }
        .panel-top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
        .panel-title { font-family: "Space Grotesk", sans-serif; font-size: 18px; font-weight: 700; }
        .live-dot { display: inline-flex; align-items: center; gap: 7px; color: #76f9a5; font-size: 11px; font-weight: 800; }
        .live-dot::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #35e879; box-shadow: 0 0 12px #35e879; animation: blink 1.5s infinite; }
        .metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 18px; }
        .metric { padding: 16px; background: rgba(255,255,255,.035); border-left: 2px solid var(--blue); }
        .metric strong { display: block; color: var(--white); font-family: "Space Grotesk", sans-serif; font-size: 24px; }
        .metric span { display: block; margin-top: 3px; color: var(--muted); font-size: 11px; }
        .panel-list { display: grid; gap: 10px; margin-top: 18px; }
        .panel-row { display: flex; justify-content: space-between; gap: 14px; color: var(--muted); font-size: 12px; }
        .panel-row b { color: var(--cyan-soft); font-weight: 700; }
        @keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: .35; } }
        @keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }
        .section { padding: 96px 0; }
        .section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 34px; }
        .section-head h2 {
            max-width: 730px;
            margin: 13px 0 0;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(28px, 4vw, 44px);
            line-height: 1.1;
            letter-spacing: -.045em;
        }
        .section-head p { max-width: 450px; margin: 0; color: var(--muted); font-size: 14px; }
        .signal-strip {
            position: relative;
            z-index: 2;
            margin-top: -34px;
            padding: 20px 0;
            background: rgba(13, 17, 30, .95);
            border-top: 1px solid var(--line-bright);
            border-bottom: 1px solid var(--line);
        }
        .signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
        .signal { display: flex; align-items: center; gap: 13px; padding: 3px 12px; border-right: 1px solid var(--line); }
        .signal:last-child { border-right: 0; }
        .signal-icon { color: var(--cyan); font-size: 21px; }
        .signal strong { display: block; font-family: "Space Grotesk", sans-serif; font-size: 20px; }
        .signal span { display: block; color: var(--muted); font-size: 11px; }
        .matrix {
            display: grid;
            grid-template-columns: 1.4fr .8fr .8fr;
            gap: 16px;
        }
        .matrix-item {
            min-height: 250px;
            position: relative;
            overflow: hidden;
            padding: 25px;
            background: var(--panel);
            border: 1px solid var(--line);
            transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
        }
        .matrix-item:first-child { grid-row: span 2; min-height: 516px; }
        .matrix-item:hover { transform: translateY(-5px); border-color: var(--cyan); box-shadow: 0 15px 36px rgba(0, 240, 255, .12); }
        .matrix-item img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .32; transition: transform .5s ease, opacity .35s ease; }
        .matrix-item:hover img { transform: scale(1.06); opacity: .46; }
        .matrix-item::after { content: ""; position: absolute; inset: 35% 0 0; background: linear-gradient(transparent, rgba(8,9,15,.98)); }
        .matrix-content { position: absolute; z-index: 1; right: 25px; bottom: 24px; left: 25px; }
        .tag { display: inline-flex; padding: 5px 9px; color: var(--cyan); background: rgba(0, 240, 255, .11); border: 1px solid rgba(0,240,255,.28); font-size: 10px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
        .matrix-content h3 { margin: 12px 0 7px; font-family: "Space Grotesk", sans-serif; font-size: 22px; line-height: 1.15; }
        .matrix-content p { margin: 0; color: #c5cede; font-size: 13px; line-height: 1.55; }
        .matrix-arrow { display: inline-block; margin-top: 15px; color: var(--cyan); font-size: 12px; font-weight: 800; }
        .numbered-list { display: grid; gap: 12px; }
        .number-row {
            display: grid;
            grid-template-columns: 50px 1fr auto;
            align-items: center;
            gap: 16px;
            padding: 16px 18px;
            border-bottom: 1px solid var(--line);
            background: rgba(13, 17, 30, .55);
        }
        .number-row:hover { background: rgba(0, 82, 255, .1); }
        .number { color: var(--cyan); font-family: "Space Grotesk", sans-serif; font-size: 22px; font-weight: 700; }
        .number-row h3 { margin: 0 0 4px; font-size: 15px; }
        .number-row p { margin: 0; color: var(--muted); font-size: 12px; }
        .row-link { color: var(--cyan-soft); font-size: 12px; font-weight: 700; }
        .split-section { display: grid; grid-template-columns: .85fr 1.15fr; gap: 68px; align-items: center; }
        .visual-block { position: relative; min-height: 460px; overflow: hidden; background: var(--panel); border: 1px solid var(--line); }
        .visual-block img { width: 100%; height: 100%; min-height: 460px; object-fit: cover; opacity: .7; }
        .visual-block::after { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,82,255,.23), rgba(8,9,15,.2) 42%, rgba(8,9,15,.82)); }
        .visual-caption { position: absolute; z-index: 1; right: 24px; bottom: 24px; left: 24px; padding: 19px; background: rgba(8,9,15,.74); border-left: 3px solid var(--cyan); backdrop-filter: blur(8px); }
        .visual-caption strong { display: block; font-family: "Space Grotesk", sans-serif; font-size: 20px; }
        .visual-caption span { color: var(--muted); font-size: 12px; }
        .copy h2 { margin: 14px 0 17px; font-family: "Space Grotesk", sans-serif; font-size: clamp(28px, 4vw, 44px); line-height: 1.1; letter-spacing: -.045em; }
        .copy > p { color: var(--muted); font-size: 15px; }
        .check-list { display: grid; gap: 13px; margin: 25px 0 0; padding: 0; list-style: none; }
        .check-list li { position: relative; padding-left: 28px; color: #d9e1ef; font-size: 14px; }
        .check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; color: var(--cyan); font-weight: 800; }
        .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .step { padding: 25px 22px; background: linear-gradient(155deg, rgba(21,29,45,.9), rgba(13,17,30,.72)); border: 1px solid var(--line); }
        .step-count { display: flex; align-items: center; justify-content: space-between; color: var(--cyan); font-family: "Space Grotesk", sans-serif; font-size: 30px; font-weight: 700; }
        .step-count::after { content: "↗"; color: var(--blue); font-size: 24px; }
        .step h3 { margin: 18px 0 8px; font-size: 17px; }
        .step p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
        .news-layout { display: grid; grid-template-columns: 1fr 330px; gap: 25px; }
        .news-list { border-top: 1px solid var(--line); }
        .news-item { display: grid; grid-template-columns: 1fr auto; gap: 18px; align-items: center; padding: 19px 0; border-bottom: 1px solid var(--line); }
        .news-item h3 { margin: 0 0 5px; font-size: 15px; line-height: 1.4; }
        .news-item h3 a:hover { color: var(--cyan); }
        .news-meta { color: var(--muted); font-size: 11px; }
        .news-arrow { color: var(--cyan); font-size: 20px; }
        .news-feature { padding: 22px; background: linear-gradient(160deg, rgba(0,82,255,.2), rgba(17,24,39,.92)); border: 1px solid var(--line-bright); }
        .news-feature h3 { margin: 15px 0 9px; font-family: "Space Grotesk", sans-serif; font-size: 22px; line-height: 1.2; }
        .news-feature p { margin: 0; color: var(--muted); font-size: 13px; }
        .faq-list { display: grid; gap: 11px; max-width: 900px; }
        .faq-item { border: 1px solid var(--line); background: rgba(17,24,39,.7); }
        .faq-item summary { display: flex; justify-content: space-between; gap: 20px; padding: 19px 21px; color: var(--white); font-size: 15px; font-weight: 700; cursor: pointer; list-style: none; }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after { content: "+"; color: var(--cyan); font-size: 21px; line-height: 1; }
        .faq-item[open] summary::after { content: "−"; }
        .faq-answer { padding: 0 21px 20px; color: var(--muted); font-size: 13px; line-height: 1.7; }
        .cta {
            position: relative;
            overflow: hidden;
            padding: 58px;
            background: linear-gradient(110deg, #003bc0, #07152d 68%);
            border: 1px solid var(--line-bright);
            box-shadow: var(--shadow);
        }
        .cta::before { content: ""; position: absolute; width: 280px; height: 280px; right: -80px; top: -130px; border: 1px solid rgba(0,240,255,.5); transform: rotate(45deg); }
        .cta-content { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; gap: 30px; }
        .cta h2 { max-width: 650px; margin: 0 0 10px; font-family: "Space Grotesk", sans-serif; font-size: clamp(27px, 4vw, 43px); line-height: 1.1; letter-spacing: -.04em; }
        .cta p { max-width: 670px; margin: 0; color: #d5edff; font-size: 14px; }
        .site-footer { padding: 62px 0 25px; background: #06070c; border-top: 1px solid var(--line); }
        .footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 38px; }
        .footer-brand p { max-width: 350px; margin: 17px 0 0; color: var(--muted); font-size: 13px; }
        .footer-title { margin: 0 0 15px; color: var(--white); font-size: 13px; font-weight: 800; }
        .footer-links { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
        .footer-links a { color: var(--muted); font-size: 12px; transition: color .2s ease; }
        .footer-links a:hover { color: var(--cyan); }
        .payment-line { display: flex; flex-wrap: wrap; gap: 8px; }
        .payment { padding: 7px 9px; color: #dbe8ff; background: rgba(255,255,255,.06); border: 1px solid var(--line); font-size: 11px; font-weight: 700; }
        .footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 48px; padding-top: 19px; color: #758197; border-top: 1px solid var(--line); font-size: 11px; }
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 58px;
            height: 58px;
            display: grid;
            place-items: center;
            color: var(--cyan);
            background: rgba(0,0,0,.72);
            border: 1px solid var(--cyan);
            border-radius: 15px;
            box-shadow: 0 0 18px rgba(0,240,255,.42);
            animation: float 3.2s ease-in-out infinite;
            transition: opacity .25s ease, transform .25s ease, box-shadow .25s ease;
        }
        .fab:hover { opacity: 1; transform: scale(1.1); box-shadow: 0 0 30px rgba(0,240,255,.7); }
        .fab-icon { font-size: 23px; }
        .fab-badge { position: absolute; top: -5px; right: -5px; width: 14px; height: 14px; border-radius: 50%; background: var(--danger); box-shadow: 0 0 10px var(--danger); }
        .muted-box { padding: 22px; color: var(--muted); background: rgba(17,24,39,.7); border: 1px solid var(--line); font-size: 13px; }
        @media (max-width: 1024px) {
            .nav-links { gap: 0; }
            .nav-link { padding-inline: 8px; font-size: 12px; }
            .brand { min-width: 210px; }
            .hero-grid, .split-section { gap: 35px; }
            .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 768px) {
            .container { width: min(100% - 30px, 600px); }
            .nav-wrap { min-height: 70px; }
            .brand-text { max-width: 180px; font-size: 12px; }
            .brand-mark { width: 36px; height: 36px; }
            .menu-toggle { display: block; }
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                right: 15px;
                left: 15px;
                padding: 10px;
                flex-direction: column;
                align-items: stretch;
                background: rgba(13,17,30,.98);
                border: 1px solid var(--line-bright);
                box-shadow: var(--shadow);
            }
            .nav-links.open { display: flex; }
            .nav-link { padding: 12px 14px; }
            .nav-link.active::after { left: 14px; right: auto; width: 30px; bottom: 7px; }
            .nav-actions { margin-left: auto; }
            .login-link { display: inline-block; padding-inline: 4px; font-size: 12px; }
            .nav-actions .btn { min-height: 40px; padding-inline: 12px; font-size: 11px; }
            .hero { min-height: auto; padding: 132px 0 90px; }
            .hero-grid, .split-section, .news-layout { grid-template-columns: 1fr; }
            .hero-copy h1 { font-size: clamp(36px, 10vw, 58px); }
            .hero-copy p { font-size: 15px; }
            .hero-panel { margin-top: 10px; }
            .signal-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .signal { padding: 10px 5px; border-right: 0; }
            .matrix { grid-template-columns: repeat(2, 1fr); }
            .matrix-item:first-child { grid-column: 1 / -1; grid-row: auto; min-height: 370px; }
            .matrix-item { min-height: 220px; }
            .steps { grid-template-columns: 1fr; }
            .section { padding: 70px 0; }
            .section-head { display: block; }
            .section-head p { margin-top: 15px; }
            .cta { padding: 36px 25px; }
            .cta-content { display: block; }
            .cta .btn { margin-top: 24px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 18px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .container { width: min(100% - 24px, 460px); }
            .brand-text { max-width: 135px; font-size: 10px; }
            .brand-mark { width: 32px; height: 32px; font-size: 16px; }
            .nav-actions { gap: 2px; }
            .nav-actions .btn { padding-inline: 9px; }
            .hero-copy h1 { font-size: 37px; }
            .hero-actions { display: grid; grid-template-columns: 1fr; }
            .hero-actions .btn { width: 100%; }
            .metric-grid, .matrix, .signal-grid { grid-template-columns: 1fr; }
            .matrix-item:first-child { min-height: 310px; }
            .matrix-item { min-height: 230px; }
            .number-row { grid-template-columns: 35px 1fr; }
            .row-link { grid-column: 2; }
            .visual-block, .visual-block img { min-height: 340px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-bottom { display: block; }
            .footer-bottom span { display: block; margin-top: 7px; }
        }

/* roulang page: category1 */
:root {
            --ink: #08090f;
            --navy: #0d111e;
            --panel: #111827;
            --panel-soft: #151d2d;
            --blue: #0052ff;
            --cyan: #00f0ff;
            --cyan-soft: #8cf7ff;
            --white: #f8fbff;
            --muted: #aab5c8;
            --line: rgba(117, 148, 204, .22);
            --line-bright: rgba(0, 240, 255, .42);
            --gold: #f5c451;
            --danger: #ff5577;
            --green: #49e6a1;
            --radius-lg: 24px;
            --radius-md: 16px;
            --shadow: 0 22px 70px rgba(0, 0, 0, .34);
        }

        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--white);
            background:
                radial-gradient(circle at 78% 4%, rgba(0, 82, 255, .17), transparent 27rem),
                radial-gradient(circle at 6% 38%, rgba(0, 240, 255, .07), transparent 28rem),
                var(--ink);
            font-family: "Be Vietnam Pro", Arial, sans-serif;
            line-height: 1.65;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: .2;
            background-image: linear-gradient(rgba(0,240,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(0,240,255,.08) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: linear-gradient(to bottom, #000, transparent 85%);
        }
        a { color: inherit; text-decoration: none; }
        img { display: block; max-width: 100%; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        button:focus-visible, a:focus-visible, input:focus-visible {
            outline: 3px solid var(--cyan);
            outline-offset: 3px;
        }
        .container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

        .site-header {
            position: fixed;
            inset: 0 0 auto;
            z-index: 40;
            background: rgba(8, 9, 15, .84);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--line);
        }
        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 250px;
            font-family: "Space Grotesk", sans-serif;
            font-weight: 700;
            letter-spacing: -.03em;
        }
        .brand-mark {
            width: 40px;
            height: 40px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: linear-gradient(135deg, var(--cyan), var(--blue));
            clip-path: polygon(16% 0, 100% 0, 84% 100%, 0 100%);
            font-size: 20px;
            box-shadow: 0 0 22px rgba(0, 240, 255, .3);
        }
        .brand-text { max-width: 280px; font-size: 14px; line-height: 1.25; }
        .brand-text small { color: var(--cyan-soft); font-size: 10px; font-weight: 600; }
        .nav-links { display: flex; align-items: center; gap: 5px; }
        .nav-link {
            position: relative;
            padding: 10px 13px;
            color: var(--muted);
            font-size: 13px;
            font-weight: 600;
            transition: color .25s ease, background .25s ease;
        }
        .nav-link:hover, .nav-link.active { color: var(--white); background: rgba(0, 240, 255, .08); }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 13px;
            right: 13px;
            bottom: 3px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
        }
        .nav-actions { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
        .login-link {
            padding: 9px 8px;
            color: var(--cyan-soft);
            font-size: 13px;
            font-weight: 700;
            transition: color .2s ease;
        }
        .login-link:hover { color: var(--white); }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: var(--white);
            border: 1px solid var(--line);
            background: var(--panel);
            border-radius: 10px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 0 20px;
            border: 1px solid transparent;
            font-size: 13px;
            font-weight: 800;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
        }
        .btn:hover { transform: translateY(-2px); }
        .btn:active { transform: translateY(1px) scale(.98); }
        .btn-primary {
            color: #fff;
            background: linear-gradient(110deg, #0052ff, #008eff);
            box-shadow: 0 10px 28px rgba(0, 82, 255, .28);
            clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
        }
        .btn-primary:hover { box-shadow: 0 14px 36px rgba(0, 240, 255, .3); }
        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-bright);
            background: rgba(0, 240, 255, .04);
        }
        .btn-outline:hover { background: rgba(0, 240, 255, .12); }
        .btn-small { min-height: 38px; padding: 0 14px; font-size: 12px; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--cyan);
            font-size: 11px;
            font-weight: 800;
            letter-spacing: .14em;
            text-transform: uppercase;
        }
        .eyebrow::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
        }

        .inner-hero {
            position: relative;
            min-height: 555px;
            padding: 148px 0 88px;
            isolation: isolate;
            border-bottom: 1px solid var(--line);
            background:
                linear-gradient(90deg, rgba(8,9,15,.96) 0%, rgba(8,9,15,.78) 43%, rgba(8,9,15,.32) 100%),
                url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
        }
        .inner-hero::after {
            content: "";
            position: absolute;
            z-index: -1;
            inset: auto 0 0;
            height: 180px;
            background: linear-gradient(transparent, var(--ink));
        }
        .hero-layout {
            display: grid;
            grid-template-columns: minmax(0, 1.1fr) minmax(330px, .76fr);
            gap: 60px;
            align-items: end;
        }
        .breadcrumb {
            display: flex;
            gap: 9px;
            margin: 0 0 22px;
            color: var(--muted);
            font-size: 12px;
        }
        .breadcrumb span:last-child { color: var(--cyan-soft); }
        .hero-copy h1 {
            max-width: 730px;
            margin: 17px 0 20px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(37px, 5vw, 64px);
            line-height: 1.04;
            letter-spacing: -.055em;
        }
        .hero-copy p {
            max-width: 670px;
            margin: 0;
            color: #d4def0;
            font-size: 16px;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
        .countdown-strip {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 13px;
            max-width: 695px;
            margin-top: 30px;
            padding: 12px 15px;
            border: 1px solid rgba(0,240,255,.28);
            background: rgba(8,15,31,.72);
            backdrop-filter: blur(8px);
        }
        .countdown-strip strong { color: var(--white); font-size: 12px; }
        .countdown-label { color: var(--muted); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
        .time-boxes { display: flex; gap: 6px; }
        .time-box {
            min-width: 37px;
            padding: 3px 5px;
            color: var(--cyan);
            border: 1px solid var(--line);
            background: rgba(0,240,255,.06);
            text-align: center;
            font-family: "Space Grotesk", sans-serif;
            font-size: 15px;
            font-weight: 700;
            line-height: 1.2;
        }
        .time-box small { display: block; color: var(--muted); font-family: "Be Vietnam Pro", sans-serif; font-size: 8px; font-weight: 600; }

        .hero-dashboard {
            padding: 23px;
            border: 1px solid var(--line-bright);
            background: linear-gradient(150deg, rgba(18,30,54,.95), rgba(10,13,23,.86));
            box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.07);
            clip-path: polygon(0 14px, 14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
        }
        .dash-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
        .dash-title { margin: 0; font-family: "Space Grotesk", sans-serif; font-size: 17px; }
        .live-dot { display: inline-flex; align-items: center; gap: 6px; color: var(--green); font-size: 10px; font-weight: 800; letter-spacing: .07em; }
        .live-dot::before { content:""; width: 7px; height: 7px; background: var(--green); border-radius: 50%; box-shadow: 0 0 10px var(--green); animation: blink 1.4s infinite; }
        .region-row { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 15px 0; border-bottom: 1px solid var(--line); }
        .region-row:last-of-type { border-bottom: 0; }
        .region-row strong { display: block; font-size: 13px; }
        .region-row span { color: var(--muted); font-size: 11px; }
        .region-status { align-self: center; color: var(--cyan); font-family: "Space Grotesk", sans-serif; font-size: 13px; font-weight: 700; }
        .dash-note { margin: 15px 0 0; color: var(--muted); font-size: 11px; }

        main { padding: 0 0 88px; }
        .section { padding-top: 94px; }
        .section-heading { max-width: 710px; margin-bottom: 34px; }
        .section-heading h2 {
            margin: 11px 0 13px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(28px, 3.4vw, 42px);
            line-height: 1.12;
            letter-spacing: -.04em;
        }
        .section-heading p { margin: 0; color: var(--muted); font-size: 15px; }

        .metrics {
            display: grid;
            grid-template-columns: 1.25fr repeat(3, 1fr);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }
        .metric {
            min-height: 163px;
            padding: 25px 26px;
            border-right: 1px solid var(--line);
            background: rgba(17,24,39,.28);
        }
        .metric:last-child { border-right: 0; }
        .metric.featured { background: linear-gradient(120deg, rgba(0,82,255,.18), rgba(0,240,255,.05)); }
        .metric-label { display: block; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
        .metric-number { display: block; margin: 9px 0 6px; color: var(--white); font-family: "Space Grotesk", sans-serif; font-size: 31px; line-height: 1; letter-spacing: -.05em; }
        .metric-number.cyan { color: var(--cyan); }
        .metric-text { margin: 0; color: #c5cfdf; font-size: 12px; }

        .region-section { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 58px; align-items: start; }
        .region-section .section-heading { position: sticky; top: 108px; }
        .region-list { border-top: 1px solid var(--line); }
        .region-feature {
            display: grid;
            grid-template-columns: 104px minmax(0, 1fr) auto;
            gap: 24px;
            align-items: center;
            padding: 25px 2px;
            border-bottom: 1px solid var(--line);
            transition: padding .25s ease, background .25s ease;
        }
        .region-feature:hover { padding-inline: 15px; background: rgba(0,240,255,.045); }
        .region-code {
            display: grid;
            width: 86px;
            height: 86px;
            place-items: center;
            color: var(--cyan);
            border: 1px solid var(--line-bright);
            background: linear-gradient(145deg, rgba(0,240,255,.13), rgba(0,82,255,.05));
            font-family: "Space Grotesk", sans-serif;
            font-size: 21px;
            font-weight: 700;
            box-shadow: inset 0 0 25px rgba(0,240,255,.05);
        }
        .region-content h3 { margin: 0 0 7px; font-size: 19px; line-height: 1.25; }
        .region-content p { margin: 0; color: var(--muted); font-size: 13px; }
        .region-meta { color: #dbe9fb; text-align: right; font-size: 12px; }
        .region-meta span { display: block; color: var(--cyan); font-family: "Space Grotesk", sans-serif; font-size: 18px; font-weight: 700; }
        .region-meta small { color: var(--muted); font-size: 10px; }

        .image-content {
            display: grid;
            grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
            overflow: hidden;
            border: 1px solid var(--line);
            background: var(--panel);
        }
        .image-content figure { min-height: 420px; margin: 0; overflow: hidden; }
        .image-content img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s ease; }
        .image-content:hover img { transform: scale(1.05); }
        .content-copy { padding: clamp(29px, 5vw, 62px); }
        .content-copy h2 {
            margin: 12px 0 18px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(27px, 3vw, 39px);
            line-height: 1.12;
            letter-spacing: -.04em;
        }
        .content-copy > p { color: var(--muted); font-size: 14px; }
        .check-list { display: grid; gap: 15px; margin: 27px 0 0; padding: 0; list-style: none; }
        .check-list li { position: relative; padding-left: 30px; color: #d7e0ee; font-size: 13px; }
        .check-list li::before {
            content: "✓";
            position: absolute;
            top: 0;
            left: 0;
            display: grid;
            width: 19px;
            height: 19px;
            place-items: center;
            color: var(--ink);
            background: var(--cyan);
            font-size: 12px;
            font-weight: 800;
            clip-path: polygon(22% 0, 100% 0, 78% 100%, 0 100%);
        }

        .compare-wrap {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 300px;
            gap: 46px;
            align-items: end;
        }
        .comparison { border-top: 1px solid var(--line); }
        .compare-row {
            display: grid;
            grid-template-columns: 1.25fr 1fr 1fr;
            gap: 20px;
            align-items: center;
            padding: 18px 5px;
            border-bottom: 1px solid var(--line);
            font-size: 13px;
        }
        .compare-row.header { padding-top: 13px; color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
        .compare-row strong { color: var(--white); }
        .compare-row .highlight { color: var(--cyan); font-weight: 700; }
        .compare-note {
            padding: 25px;
            border-left: 3px solid var(--cyan);
            background: rgba(0,82,255,.09);
        }
        .compare-note h3 { margin: 0 0 9px; font-size: 17px; }
        .compare-note p { margin: 0; color: var(--muted); font-size: 13px; }

        .steps-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 365px; gap: 55px; }
        .steps { counter-reset: steps; border-top: 1px solid var(--line); }
        .step {
            position: relative;
            display: grid;
            grid-template-columns: 65px 1fr;
            gap: 16px;
            padding: 23px 0;
            border-bottom: 1px solid var(--line);
        }
        .step-num {
            color: var(--cyan);
            font-family: "Space Grotesk", sans-serif;
            font-size: 26px;
            font-weight: 700;
            line-height: 1;
        }
        .step h3 { margin: 0 0 5px; font-size: 16px; }
        .step p { margin: 0; color: var(--muted); font-size: 13px; }
        .notice-panel {
            align-self: start;
            padding: 29px;
            border: 1px solid rgba(245,196,81,.36);
            background:
                linear-gradient(145deg, rgba(245,196,81,.12), transparent 55%),
                var(--panel);
        }
        .notice-icon { color: var(--gold); font-size: 28px; line-height: 1; }
        .notice-panel h3 { margin: 14px 0 9px; font-family: "Space Grotesk", sans-serif; font-size: 23px; line-height: 1.16; }
        .notice-panel p { margin: 0; color: #d4d9e4; font-size: 13px; }
        .notice-panel .btn { width: 100%; margin-top: 22px; }

        .faq-layout { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 65px; }
        .faq-intro h2 {
            margin: 12px 0;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(28px, 3vw, 39px);
            line-height: 1.13;
            letter-spacing: -.04em;
        }
        .faq-intro p { color: var(--muted); font-size: 14px; }
        .faq-list { border-top: 1px solid var(--line); }
        .faq-item { border-bottom: 1px solid var(--line); }
        .faq-question {
            display: flex;
            width: 100%;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 21px 3px;
            color: var(--white);
            border: 0;
            background: transparent;
            text-align: left;
            font-size: 15px;
            font-weight: 700;
        }
        .faq-icon {
            flex: 0 0 auto;
            width: 25px;
            height: 25px;
            display: grid;
            place-items: center;
            color: var(--cyan);
            border: 1px solid var(--line-bright);
            font-size: 17px;
            transition: transform .25s ease, background .25s ease;
        }
        .faq-answer {
            display: grid;
            grid-template-rows: 0fr;
            transition: grid-template-rows .3s ease;
        }
        .faq-answer > div { overflow: hidden; }
        .faq-answer p { margin: 0; padding: 0 40px 0 3px; color: var(--muted); font-size: 13px; }
        .faq-item.open .faq-answer { grid-template-rows: 1fr; }
        .faq-item.open .faq-answer p { padding-bottom: 22px; }
        .faq-item.open .faq-icon { transform: rotate(45deg); color: var(--ink); background: var(--cyan); }

        .cta-section { padding-top: 94px; }
        .cta-box {
            position: relative;
            overflow: hidden;
            padding: clamp(35px, 6vw, 72px);
            text-align: center;
            border: 1px solid var(--line-bright);
            background:
                linear-gradient(90deg, rgba(8,9,15,.9), rgba(8,9,15,.61)),
                url("/assets/images/backpic/back-3.jpg") center/cover no-repeat;
            box-shadow: var(--shadow);
        }
        .cta-box::before {
            content: "";
            position: absolute;
            inset: 12px;
            pointer-events: none;
            border: 1px solid rgba(0,240,255,.18);
        }
        .cta-content { position: relative; z-index: 1; max-width: 690px; margin: auto; }
        .cta-content h2 {
            margin: 13px 0 15px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(30px, 4vw, 49px);
            line-height: 1.08;
            letter-spacing: -.05em;
        }
        .cta-content p { margin: 0; color: #d3deed; font-size: 15px; }
        .cta-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
        .cta-footnote { margin-top: 17px !important; color: var(--muted) !important; font-size: 11px !important; }

        .site-footer { padding: 72px 0 24px; border-top: 1px solid var(--line); background: #090b13; }
        .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 42px; }
        .footer-brand .brand { min-width: 0; }
        .footer-brand p { max-width: 330px; margin: 18px 0 0; color: var(--muted); font-size: 12px; }
        .footer-title { margin: 5px 0 16px; color: var(--white); font-size: 13px; }
        .footer-links { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
        .footer-links a { color: var(--muted); font-size: 12px; transition: color .2s ease; }
        .footer-links a:hover { color: var(--cyan); }
        .payment-line { display: flex; flex-wrap: wrap; gap: 8px; }
        .payment {
            padding: 5px 8px;
            color: var(--cyan-soft);
            border: 1px solid var(--line);
            background: rgba(0,240,255,.04);
            font-size: 10px;
            font-weight: 700;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 15px;
            margin-top: 52px;
            padding-top: 20px;
            color: #748096;
            border-top: 1px solid var(--line);
            font-size: 10px;
        }

        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            display: inline-flex;
            align-items: center;
            gap: 9px;
            min-width: 54px;
            min-height: 54px;
            padding: 0 15px;
            color: var(--white);
            border: 1px solid transparent;
            border-radius: 13px;
            background:
                linear-gradient(#08090f, #08090f) padding-box,
                linear-gradient(115deg, var(--cyan), var(--blue), var(--cyan)) border-box;
            box-shadow: 0 0 17px rgba(0,240,255,.36);
            opacity: .72;
            transition: transform .25s ease, opacity .25s ease, box-shadow .25s ease;
            animation: floatFab 3s ease-in-out infinite;
        }
        .fab:hover { opacity: 1; transform: scale(1.08); box-shadow: 0 0 30px rgba(0,240,255,.62); }
        .fab:active { transform: scale(.96); }
        .fab-icon { color: var(--cyan); font-size: 22px; font-weight: 800; text-shadow: 0 0 11px var(--cyan); }
        .fab-text { font-size: 11px; font-weight: 800; }
        .fab-dot { position: absolute; top: 5px; right: 5px; width: 7px; height: 7px; background: var(--danger); border-radius: 50%; box-shadow: 0 0 8px var(--danger); animation: blink 1s infinite; }

        @keyframes blink { 50% { opacity: .3; } }
        @keyframes floatFab { 50% { transform: translateY(-6px); } }

        @media (max-width: 1060px) {
            .brand { min-width: 210px; }
            .brand-text { font-size: 12px; }
            .nav-link { padding-inline: 9px; font-size: 12px; }
            .nav-actions .login-link { display: none; }
            .hero-layout { gap: 35px; }
            .region-section, .faq-layout { gap: 38px; }
            .footer-grid { gap: 28px; }
        }
        @media (max-width: 820px) {
            .nav-wrap { min-height: 68px; gap: 10px; }
            .brand { min-width: 0; }
            .brand-text { max-width: 188px; font-size: 11px; }
            .brand-text small { font-size: 8px; }
            .brand-mark { width: 34px; height: 34px; font-size: 16px; }
            .menu-toggle { display: grid; place-items: center; order: 3; }
            .nav-links {
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                display: grid;
                gap: 0;
                max-height: 0;
                overflow: hidden;
                background: rgba(13,17,30,.98);
                border-bottom: 0 solid var(--line);
                transition: max-height .3s ease, border-color .3s ease;
            }
            .nav-links.open { max-height: 260px; border-bottom-width: 1px; }
            .nav-link { padding: 14px 20px; border-top: 1px solid rgba(117,148,204,.12); }
            .nav-link.active::after { left: 20px; right: auto; bottom: 0; width: 34px; }
            .nav-actions { margin-left: auto; }
            .nav-actions .btn { min-height: 38px; padding-inline: 11px; font-size: 11px; }
            .inner-hero { min-height: auto; padding: 124px 0 67px; }
            .hero-layout, .region-section, .image-content, .compare-wrap, .steps-wrap, .faq-layout { grid-template-columns: 1fr; }
            .hero-dashboard { max-width: 510px; }
            .metrics { grid-template-columns: repeat(2, 1fr); }
            .metric.featured { grid-column: span 2; }
            .metric:nth-child(2) { border-right: 1px solid var(--line); }
            .metric:nth-child(3) { border-top: 1px solid var(--line); }
            .metric:nth-child(4) { border-top: 1px solid var(--line); }
            .region-section .section-heading { position: static; }
            .image-content figure { min-height: 290px; }
            .compare-wrap { gap: 28px; }
            .notice-panel { max-width: 560px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .container { width: min(100% - 28px, 1160px); }
            .brand-text { display: none; }
            .nav-actions .btn { min-height: 36px; padding-inline: 9px; font-size: 10px; }
            .menu-toggle { width: 38px; height: 38px; }
            .inner-hero { padding-top: 110px; }
            .hero-copy h1 { font-size: 35px; }
            .hero-copy p { font-size: 14px; }
            .hero-actions .btn { width: 100%; }
            .countdown-strip { align-items: flex-start; }
            .time-boxes { width: 100%; }
            .time-box { flex: 1; }
            .hero-dashboard { padding: 18px; }
            .section, .cta-section { padding-top: 67px; }
            .metrics { grid-template-columns: 1fr 1fr; }
            .metric { min-height: 136px; padding: 18px 15px; }
            .metric-number { font-size: 25px; }
            .region-feature { grid-template-columns: 64px 1fr; gap: 14px; }
            .region-code { width: 57px; height: 57px; font-size: 15px; }
            .region-meta { grid-column: 2; text-align: left; }
            .region-meta span { font-size: 15px; }
            .content-copy { padding: 27px 21px; }
            .image-content figure { min-height: 235px; }
            .compare-row { grid-template-columns: 1.1fr .85fr .85fr; gap: 8px; font-size: 11px; }
            .compare-row.header { font-size: 8px; }
            .step { grid-template-columns: 49px 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 29px; }
            .footer-bottom { flex-direction: column; margin-top: 35px; }
            .fab { bottom: 20px; min-width: 52px; min-height: 52px; }
            .fab-text { display: none; }
        }

/* roulang page: category2 */
:root {
            --ink: #08090f;
            --navy: #0d111e;
            --panel: #111827;
            --panel-soft: #151d2d;
            --blue: #0052ff;
            --cyan: #00f0ff;
            --cyan-soft: #8cf7ff;
            --white: #f8fbff;
            --muted: #aab5c8;
            --line: rgba(117, 148, 204, .22);
            --line-bright: rgba(0, 240, 255, .42);
            --gold: #f5c451;
            --danger: #ff5577;
            --success: #54e69b;
            --radius-lg: 24px;
            --radius-md: 16px;
            --shadow: 0 22px 70px rgba(0, 0, 0, .34);
        }

        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--white);
            background:
                radial-gradient(circle at 78% 4%, rgba(0, 82, 255, .17), transparent 27rem),
                radial-gradient(circle at 6% 38%, rgba(0, 240, 255, .07), transparent 28rem),
                var(--ink);
            font-family: "Be Vietnam Pro", Arial, sans-serif;
            line-height: 1.65;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: .2;
            background-image:
                linear-gradient(rgba(0,240,255,.08) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0,240,255,.08) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: linear-gradient(to bottom, #000, transparent 85%);
        }
        a { color: inherit; text-decoration: none; }
        img { display: block; max-width: 100%; }
        button, input, textarea, select { font: inherit; }
        button { cursor: pointer; }
        .container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 40;
            background: rgba(8, 9, 15, .84);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--line);
        }
        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 22px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 250px;
            font-family: "Space Grotesk", sans-serif;
            font-weight: 700;
            letter-spacing: -.03em;
        }
        .brand-mark {
            width: 40px;
            height: 40px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: linear-gradient(135deg, var(--cyan), var(--blue));
            clip-path: polygon(16% 0, 100% 0, 84% 100%, 0 100%);
            font-size: 20px;
            box-shadow: 0 0 22px rgba(0, 240, 255, .3);
        }
        .brand-text { max-width: 280px; font-size: 14px; line-height: 1.25; }
        .brand-text small {
            color: var(--cyan-soft);
            font-size: 10px;
            font-family: "Be Vietnam Pro", sans-serif;
            letter-spacing: .01em;
        }
        .nav-links { display: flex; align-items: center; gap: 5px; }
        .nav-link {
            position: relative;
            padding: 10px 13px;
            color: var(--muted);
            font-size: 13px;
            font-weight: 600;
            transition: color .25s ease, background .25s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--white);
            background: rgba(0, 240, 255, .08);
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 13px;
            right: 13px;
            bottom: 3px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .nav-login {
            padding: 10px 10px;
            color: var(--muted);
            font-size: 13px;
            font-weight: 700;
            transition: color .2s ease;
        }
        .nav-login:hover { color: var(--cyan); }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: var(--white);
            border: 1px solid var(--line);
            background: var(--panel);
            border-radius: 10px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 0 20px;
            border: 1px solid transparent;
            font-size: 13px;
            font-weight: 800;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
        }
        .btn:hover { transform: translateY(-2px); }
        .btn:active { transform: translateY(1px) scale(.98); }
        .btn:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 3px solid rgba(0, 240, 255, .42);
            outline-offset: 3px;
        }
        .btn-primary {
            color: #fff;
            background: linear-gradient(110deg, #0052ff, #008eff);
            box-shadow: 0 10px 28px rgba(0, 82, 255, .28);
            clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
        }
        .btn-primary:hover { box-shadow: 0 14px 36px rgba(0, 240, 255, .3); }
        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-bright);
            background: rgba(0, 240, 255, .04);
        }
        .btn-outline:hover { background: rgba(0, 240, 255, .12); }
        .btn-muted {
            color: var(--white);
            border-color: var(--line);
            background: rgba(255,255,255,.04);
        }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--cyan);
            font-size: 11px;
            font-weight: 800;
            letter-spacing: .14em;
            text-transform: uppercase;
        }
        .eyebrow::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
        }

        .page-banner {
            position: relative;
            min-height: 485px;
            padding: 150px 0 76px;
            background:
                linear-gradient(90deg, rgba(8, 9, 15, .97) 0%, rgba(8, 9, 15, .82) 53%, rgba(8, 9, 15, .48) 100%),
                url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
            border-bottom: 1px solid var(--line);
        }
        .page-banner::after {
            content: "";
            position: absolute;
            inset: auto 0 0;
            height: 150px;
            background: linear-gradient(transparent, var(--ink));
            pointer-events: none;
        }
        .banner-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr);
            gap: 56px;
            align-items: center;
        }
        .banner-copy h1 {
            max-width: 770px;
            margin: 18px 0 18px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(34px, 5vw, 66px);
            line-height: 1.07;
            letter-spacing: -.055em;
        }
        .banner-copy h1 span { color: var(--cyan); }
        .banner-copy p {
            max-width: 690px;
            margin: 0;
            color: var(--muted);
            font-size: 17px;
        }
        .banner-actions {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 28px;
        }
        .quick-panel {
            position: relative;
            padding: 25px;
            background: linear-gradient(145deg, rgba(17,24,39,.96), rgba(13,17,30,.82));
            border: 1px solid var(--line-bright);
            clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
            box-shadow: var(--shadow), 0 0 36px rgba(0,240,255,.08);
        }
        .quick-panel::before {
            content: "TRUY CẬP NHANH";
            position: absolute;
            top: 14px;
            right: 18px;
            color: var(--cyan);
            font-size: 10px;
            font-weight: 800;
            letter-spacing: .14em;
        }
        .quick-panel h2 {
            margin: 28px 0 7px;
            font-family: "Space Grotesk", sans-serif;
            font-size: 25px;
            letter-spacing: -.03em;
        }
        .quick-panel p { margin: 0 0 20px; color: var(--muted); font-size: 13px; }
        .mini-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 14px 0;
            border-top: 1px solid var(--line);
        }
        .mini-row strong { display: block; color: var(--white); font-size: 14px; }
        .mini-row span { color: var(--muted); font-size: 11px; }
        .signal {
            width: 9px;
            height: 9px;
            flex: 0 0 auto;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 13px var(--success);
            animation: pulse 1.8s infinite;
        }

        main { position: relative; }
        .section { padding: 94px 0; }
        .section-tight { padding: 68px 0; }
        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: end;
            gap: 32px;
            margin-bottom: 32px;
        }
        .section-head h2 {
            max-width: 680px;
            margin: 12px 0 0;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(28px, 4vw, 44px);
            line-height: 1.12;
            letter-spacing: -.045em;
        }
        .section-head p {
            max-width: 430px;
            margin: 0;
            color: var(--muted);
            font-size: 14px;
        }
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            border: 1px solid var(--line);
            background: rgba(17,24,39,.68);
        }
        .stat-item {
            min-height: 132px;
            padding: 25px 24px;
            border-right: 1px solid var(--line);
        }
        .stat-item:last-child { border-right: 0; }
        .stat-number {
            display: block;
            color: var(--cyan);
            font-family: "Space Grotesk", sans-serif;
            font-size: 32px;
            font-weight: 700;
            line-height: 1;
        }
        .stat-label {
            display: block;
            margin-top: 12px;
            color: var(--muted);
            font-size: 12px;
        }

        .matrix-layout {
            display: grid;
            grid-template-columns: .82fr 1.18fr;
            gap: 24px;
            align-items: stretch;
        }
        .intro-panel {
            padding: 34px;
            background:
                linear-gradient(145deg, rgba(0,82,255,.2), rgba(17,24,39,.92)),
                url("/assets/images/coverpic/cover-4.jpg") center/cover no-repeat;
            border: 1px solid var(--line-bright);
            min-height: 390px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            box-shadow: var(--shadow);
        }
        .intro-panel h3 {
            max-width: 430px;
            margin: 0 0 12px;
            font-family: "Space Grotesk", sans-serif;
            font-size: 31px;
            line-height: 1.13;
        }
        .intro-panel p { max-width: 450px; margin: 0; color: #d6e1f3; font-size: 14px; }
        .matrix-list { display: grid; gap: 11px; }
        .matrix-item {
            display: grid;
            grid-template-columns: 58px 1fr auto;
            gap: 16px;
            align-items: center;
            min-height: 116px;
            padding: 18px 20px;
            background: var(--panel);
            border: 1px solid var(--line);
            transition: border-color .25s ease, transform .25s ease, background .25s ease;
        }
        .matrix-item:hover {
            transform: translateX(5px);
            border-color: var(--cyan);
            background: var(--panel-soft);
        }
        .matrix-icon {
            width: 50px;
            height: 50px;
            display: grid;
            place-items: center;
            color: var(--cyan);
            font-family: "Space Grotesk", sans-serif;
            font-size: 19px;
            font-weight: 700;
            border: 1px solid var(--line-bright);
            background: rgba(0,240,255,.07);
            clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
        }
        .matrix-item h3 { margin: 0 0 3px; font-size: 15px; }
        .matrix-item p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
        .matrix-tag {
            color: var(--gold);
            font-size: 11px;
            font-weight: 800;
            white-space: nowrap;
        }

        .compare-section {
            background: linear-gradient(180deg, rgba(13,17,30,.18), rgba(13,17,30,.78));
            border-top: 1px solid rgba(117,148,204,.12);
            border-bottom: 1px solid rgba(117,148,204,.12);
        }
        .compare-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            align-items: start;
        }
        .compare-card {
            position: relative;
            padding: 29px 25px;
            background: rgba(17,24,39,.78);
            border: 1px solid var(--line);
        }
        .compare-card.recommended {
            margin-top: -14px;
            border-color: var(--cyan);
            background: linear-gradient(145deg, rgba(0,82,255,.24), rgba(17,24,39,.92));
            box-shadow: 0 16px 50px rgba(0,82,255,.18);
        }
        .recommend-label {
            position: absolute;
            top: -13px;
            left: 22px;
            padding: 4px 10px;
            color: var(--ink);
            background: var(--cyan);
            font-size: 10px;
            font-weight: 800;
            letter-spacing: .08em;
        }
        .compare-card h3 {
            margin: 0 0 8px;
            font-family: "Space Grotesk", sans-serif;
            font-size: 22px;
        }
        .compare-card > p { min-height: 70px; margin: 0; color: var(--muted); font-size: 13px; }
        .price-line {
            margin: 24px 0 20px;
            padding: 16px 0;
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }
        .price-line strong {
            display: block;
            color: var(--cyan);
            font-family: "Space Grotesk", sans-serif;
            font-size: 27px;
        }
        .price-line span { color: var(--muted); font-size: 11px; }
        .check-list {
            display: grid;
            gap: 11px;
            padding: 0;
            margin: 0 0 24px;
            list-style: none;
        }
        .check-list li {
            position: relative;
            padding-left: 24px;
            color: #dbe7f7;
            font-size: 13px;
        }
        .check-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--success);
            font-weight: 800;
        }

        .result-layout {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 48px;
            align-items: center;
        }
        .result-copy h2 {
            margin: 12px 0 16px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(29px, 4vw, 46px);
            line-height: 1.1;
            letter-spacing: -.045em;
        }
        .result-copy > p { max-width: 580px; color: var(--muted); }
        .result-points {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px 24px;
            margin-top: 27px;
        }
        .result-point {
            padding-left: 16px;
            border-left: 2px solid var(--blue);
        }
        .result-point strong { display: block; margin-bottom: 4px; font-size: 14px; }
        .result-point span { color: var(--muted); font-size: 12px; line-height: 1.5; }
        .result-visual {
            position: relative;
            min-height: 380px;
            padding: 28px;
            background: url("/assets/images/coverpic/cover-6.jpg") center/cover no-repeat;
            border: 1px solid var(--line-bright);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .result-visual::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(145deg, rgba(8,9,15,.12), rgba(8,9,15,.9));
        }
        .dashboard {
            position: absolute;
            right: 25px;
            bottom: 25px;
            left: 25px;
            padding: 19px;
            background: rgba(8,9,15,.85);
            border: 1px solid rgba(0,240,255,.35);
            backdrop-filter: blur(10px);
        }
        .dashboard-top {
            display: flex;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 16px;
        }
        .dashboard-top span { color: var(--muted); font-size: 11px; }
        .dashboard-top strong { color: var(--success); font-size: 12px; }
        .bar-group { display: grid; gap: 12px; }
        .bar-row { display: grid; grid-template-columns: 65px 1fr 42px; gap: 9px; align-items: center; }
        .bar-row label, .bar-row b { font-size: 11px; }
        .bar-row label { color: #dbe7f7; }
        .bar-row b { color: var(--cyan); text-align: right; }
        .bar-track { height: 7px; background: rgba(255,255,255,.1); }
        .bar-fill {
            display: block;
            height: 100%;
            background: linear-gradient(90deg, var(--blue), var(--cyan));
            box-shadow: 0 0 12px rgba(0,240,255,.38);
        }

        .steps-layout {
            display: grid;
            grid-template-columns: .75fr 1.25fr;
            gap: 46px;
        }
        .steps-layout > div:first-child h2 {
            margin: 12px 0 15px;
            font-family: "Space Grotesk", sans-serif;
            font-size: 38px;
            line-height: 1.12;
            letter-spacing: -.04em;
        }
        .steps-layout > div:first-child p { color: var(--muted); font-size: 14px; }
        .step-list { display: grid; gap: 0; }
        .step {
            display: grid;
            grid-template-columns: 55px 1fr;
            gap: 20px;
            padding: 0 0 27px;
            margin-bottom: 27px;
            border-bottom: 1px solid var(--line);
        }
        .step:last-child { margin-bottom: 0; }
        .step-number {
            width: 42px;
            height: 42px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: var(--cyan);
            font-family: "Space Grotesk", sans-serif;
            font-weight: 800;
            clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
        }
        .step h3 { margin: 0 0 6px; font-size: 16px; }
        .step p { margin: 0; color: var(--muted); font-size: 13px; }

        .faq-section { background: rgba(13,17,30,.55); }
        .faq-grid {
            display: grid;
            grid-template-columns: .7fr 1.3fr;
            gap: 58px;
            align-items: start;
        }
        .faq-intro h2 {
            margin: 12px 0 15px;
            font-family: "Space Grotesk", sans-serif;
            font-size: 38px;
            line-height: 1.12;
            letter-spacing: -.04em;
        }
        .faq-intro p { color: var(--muted); font-size: 14px; }
        .faq-list { display: grid; gap: 10px; }
        .faq-item {
            border: 1px solid var(--line);
            background: rgba(17,24,39,.72);
        }
        .faq-item summary {
            position: relative;
            padding: 20px 52px 20px 21px;
            color: var(--white);
            font-size: 14px;
            font-weight: 700;
            cursor: pointer;
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: "+";
            position: absolute;
            top: 16px;
            right: 20px;
            color: var(--cyan);
            font-size: 23px;
            font-weight: 400;
        }
        .faq-item[open] summary { color: var(--cyan); }
        .faq-item[open] summary::after { content: "−"; }
        .faq-answer {
            padding: 0 21px 20px;
            color: var(--muted);
            font-size: 13px;
            border-top: 1px solid var(--line);
        }

        .cta-section { padding: 86px 0; }
        .cta-box {
            display: grid;
            grid-template-columns: 1fr .85fr;
            gap: 38px;
            align-items: center;
            padding: 45px;
            background:
                linear-gradient(115deg, rgba(0,82,255,.43), rgba(0,240,255,.08)),
                url("/assets/images/backpic/back-3.jpg") center/cover no-repeat;
            border: 1px solid rgba(0,240,255,.48);
            box-shadow: var(--shadow);
        }
        .cta-box h2 {
            margin: 12px 0 12px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(28px, 4vw, 46px);
            line-height: 1.08;
            letter-spacing: -.045em;
        }
        .cta-box p { max-width: 610px; margin: 0; color: #dbe7f7; font-size: 14px; }
        .contact-form {
            display: grid;
            gap: 11px;
            padding: 22px;
            background: rgba(8,9,15,.74);
            border: 1px solid rgba(255,255,255,.17);
        }
        .contact-form label {
            color: var(--cyan-soft);
            font-size: 11px;
            font-weight: 700;
        }
        .contact-form input, .contact-form textarea {
            width: 100%;
            padding: 12px 13px;
            color: var(--white);
            background: rgba(255,255,255,.07);
            border: 1px solid var(--line);
            border-radius: 4px;
        }
        .contact-form textarea { min-height: 78px; resize: vertical; }
        .contact-form input::placeholder, .contact-form textarea::placeholder { color: #8290a7; }
        .form-note { color: var(--muted); font-size: 10px; line-height: 1.45; }
        .form-message {
            display: none;
            padding: 9px 11px;
            color: var(--success);
            background: rgba(84,230,155,.08);
            border: 1px solid rgba(84,230,155,.25);
            font-size: 11px;
        }

        .site-footer {
            padding: 66px 0 25px;
            background: #06070b;
            border-top: 1px solid var(--line);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.45fr 1fr 1fr 1fr;
            gap: 34px;
        }
        .footer-brand .brand { min-width: 0; margin-bottom: 18px; }
        .footer-brand p { max-width: 340px; margin: 0; color: var(--muted); font-size: 12px; }
        .footer-title {
            margin: 7px 0 17px;
            color: var(--white);
            font-size: 13px;
            font-weight: 800;
        }
        .footer-links {
            display: grid;
            gap: 10px;
            padding: 0;
            margin: 0;
            list-style: none;
        }
        .footer-links a { color: var(--muted); font-size: 12px; transition: color .2s ease; }
        .footer-links a:hover { color: var(--cyan); }
        .payment-line { display: flex; flex-wrap: wrap; gap: 7px; }
        .payment {
            padding: 7px 9px;
            color: var(--cyan-soft);
            border: 1px solid var(--line);
            background: rgba(0,240,255,.05);
            font-size: 10px;
            font-weight: 700;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 18px;
            margin-top: 48px;
            padding-top: 20px;
            color: #6f7c90;
            border-top: 1px solid var(--line);
            font-size: 10px;
        }

        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            min-width: 56px;
            height: 56px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 16px;
            color: var(--cyan);
            background: rgba(0,0,0,.72);
            border: 1px solid transparent;
            border-radius: 999px;
            opacity: .72;
            box-shadow: 0 0 15px rgba(0,240,255,.5);
            isolation: isolate;
            transition: opacity .25s ease, transform .25s ease, box-shadow .25s ease;
        }
        .fab::before {
            content: "";
            position: absolute;
            inset: -1px;
            z-index: -1;
            border-radius: inherit;
            padding: 1px;
            background: linear-gradient(120deg, var(--cyan), var(--blue), var(--cyan));
            mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
            mask-composite: exclude;
            animation: borderFlow 3s linear infinite;
        }
        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0,240,255,.8);
        }
        .fab:active { transform: scale(.95) translateY(2px); }
        .fab-icon { font-size: 21px; transition: transform .5s ease; }
        .fab:hover .fab-icon { transform: rotate(360deg); }
        .fab-label { font-size: 11px; font-weight: 800; }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: .42; transform: scale(.75); }
        }
        @keyframes borderFlow {
            0% { filter: hue-rotate(0deg); }
            100% { filter: hue-rotate(360deg); }
        }

        @media (max-width: 1100px) {
            .nav-links { gap: 0; }
            .nav-link { padding-inline: 9px; font-size: 12px; }
            .brand { min-width: 220px; }
            .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
            .footer-grid > :last-child { grid-column: span 3; }
        }
        @media (max-width: 860px) {
            .nav-wrap { min-height: 70px; }
            .brand { min-width: 0; flex: 1; }
            .brand-text { max-width: 220px; font-size: 12px; }
            .nav-links {
                position: absolute;
                top: 70px;
                left: 20px;
                right: 20px;
                display: none;
                padding: 10px;
                flex-direction: column;
                align-items: stretch;
                background: rgba(8,9,15,.97);
                border: 1px solid var(--line);
                box-shadow: var(--shadow);
            }
            .nav-links.is-open { display: flex; }
            .nav-link { padding: 13px 15px; }
            .nav-link.active::after { left: 15px; right: auto; width: 25px; bottom: 6px; }
            .menu-toggle { display: block; }
            .nav-actions { order: 3; }
            .nav-login { display: inline-flex; }
            .banner-grid, .result-layout, .steps-layout, .faq-grid, .cta-box {
                grid-template-columns: 1fr;
            }
            .banner-grid { gap: 28px; }
            .quick-panel { max-width: 620px; }
            .matrix-layout { grid-template-columns: 1fr; }
            .intro-panel { min-height: 320px; }
            .result-visual { min-height: 330px; }
            .steps-layout { gap: 30px; }
            .faq-intro h2, .steps-layout > div:first-child h2 { font-size: 32px; }
            .cta-box { padding: 32px; }
        }
        @media (max-width: 650px) {
            .container { width: min(100% - 28px, 560px); }
            .page-banner { min-height: auto; padding: 126px 0 62px; }
            .banner-copy h1 { font-size: clamp(31px, 10vw, 48px); }
            .banner-copy p { font-size: 14px; }
            .banner-actions .btn { width: 100%; }
            .nav-actions { gap: 2px; }
            .nav-login { padding-inline: 5px; font-size: 11px; }
            .nav-actions .btn { min-height: 38px; padding-inline: 12px; font-size: 11px; }
            .brand-mark { width: 34px; height: 34px; font-size: 16px; }
            .brand-text { max-width: 165px; font-size: 10px; }
            .brand-text small { font-size: 8px; }
            .section { padding: 67px 0; }
            .section-tight { padding: 48px 0; }
            .section-head { display: block; margin-bottom: 24px; }
            .section-head p { margin-top: 14px; }
            .stats-strip { grid-template-columns: repeat(2, 1fr); }
            .stat-item { min-height: 108px; padding: 19px 15px; border-bottom: 1px solid var(--line); }
            .stat-item:nth-child(2) { border-right: 0; }
            .stat-item:nth-child(3), .stat-item:nth-child(4) { border-bottom: 0; }
            .stat-number { font-size: 26px; }
            .matrix-item { grid-template-columns: 46px 1fr; gap: 12px; padding: 15px; }
            .matrix-icon { width: 42px; height: 42px; font-size: 15px; }
            .matrix-tag { grid-column: 2; }
            .intro-panel { padding: 24px; min-height: 300px; }
            .intro-panel h3 { font-size: 25px; }
            .compare-grid { grid-template-columns: 1fr; gap: 28px; }
            .compare-card.recommended { margin-top: 0; }
            .compare-card > p { min-height: 0; }
            .result-points { grid-template-columns: 1fr; gap: 15px; }
            .result-visual { min-height: 310px; padding: 18px; }
            .dashboard { right: 15px; bottom: 15px; left: 15px; padding: 15px; }
            .bar-row { grid-template-columns: 52px 1fr 35px; }
            .cta-box { padding: 24px 18px; gap: 25px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 27px 20px; }
            .footer-grid > :last-child { grid-column: span 2; }
            .footer-brand { grid-column: span 2; }
            .footer-bottom { display: block; }
            .footer-bottom span { display: block; margin-top: 6px; }
            .fab { left: 14px; bottom: 78px; }
            .fab-label { display: none; }
        }
        @media (max-width: 380px) {
            .nav-actions .btn { padding-inline: 9px; }
            .nav-login { display: none; }
            .brand-text { max-width: 145px; }
        }

/* roulang page: article */
:root {
            --ink: #08090f;
            --navy: #0d111e;
            --panel: #111827;
            --panel-soft: #151d2d;
            --blue: #0052ff;
            --cyan: #00f0ff;
            --cyan-soft: #8cf7ff;
            --white: #f8fbff;
            --muted: #aab5c8;
            --line: rgba(117, 148, 204, .22);
            --line-bright: rgba(0, 240, 255, .42);
            --gold: #f5c451;
            --danger: #ff5577;
            --success: #53e0a3;
            --radius-lg: 24px;
            --radius-md: 16px;
            --shadow: 0 22px 70px rgba(0, 0, 0, .34);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            color: var(--white);
            background:
                radial-gradient(circle at 78% 4%, rgba(0, 82, 255, .17), transparent 27rem),
                radial-gradient(circle at 6% 38%, rgba(0, 240, 255, .07), transparent 28rem),
                var(--ink);
            font-family: "Be Vietnam Pro", Arial, sans-serif;
            line-height: 1.65;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: .2;
            background-image:
                linear-gradient(rgba(0,240,255,.08) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0,240,255,.08) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: linear-gradient(to bottom, #000, transparent 85%);
        }

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

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

        button,
        input {
            font: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: min(1160px, calc(100% - 40px));
            margin-inline: auto;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 40;
            background: rgba(8, 9, 15, .84);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--line);
        }

        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 250px;
            font-family: "Space Grotesk", sans-serif;
            font-weight: 700;
            letter-spacing: -.03em;
        }

        .brand-mark {
            width: 40px;
            height: 40px;
            display: grid;
            place-items: center;
            flex: 0 0 auto;
            color: var(--ink);
            background: linear-gradient(135deg, var(--cyan), var(--blue));
            clip-path: polygon(16% 0, 100% 0, 84% 100%, 0 100%);
            font-size: 20px;
            box-shadow: 0 0 22px rgba(0, 240, 255, .3);
        }

        .brand-text {
            max-width: 280px;
            font-size: 14px;
            line-height: 1.25;
        }

        .brand-text small {
            color: var(--cyan-soft);
            font-size: 11px;
            font-weight: 600;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .nav-link {
            position: relative;
            padding: 10px 13px;
            color: var(--muted);
            font-size: 13px;
            font-weight: 600;
            transition: color .25s ease, background .25s ease;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--white);
            background: rgba(0, 240, 255, .08);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 13px;
            right: 13px;
            bottom: 3px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: var(--white);
            border: 1px solid var(--line);
            background: var(--panel);
            border-radius: 10px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 0 20px;
            border: 1px solid transparent;
            font-size: 13px;
            font-weight: 800;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn:active {
            transform: translateY(1px) scale(.98);
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .fab:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(0, 240, 255, .5);
            outline-offset: 3px;
        }

        .btn-primary {
            color: #fff;
            background: linear-gradient(110deg, #0052ff, #008eff);
            box-shadow: 0 10px 28px rgba(0, 82, 255, .28);
            clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
        }

        .btn-primary:hover {
            box-shadow: 0 14px 36px rgba(0, 240, 255, .3);
        }

        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-bright);
            background: rgba(0, 240, 255, .04);
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, .12);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--cyan);
            font-size: 11px;
            font-weight: 800;
            letter-spacing: .14em;
            text-transform: uppercase;
        }

        .eyebrow::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
        }

        .page-banner {
            position: relative;
            min-height: 360px;
            padding: 150px 0 70px;
            display: flex;
            align-items: end;
            background:
                linear-gradient(90deg, rgba(8, 9, 15, .96), rgba(8, 9, 15, .72), rgba(8, 9, 15, .48)),
                url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
            border-bottom: 1px solid var(--line);
        }

        .page-banner::after {
            content: "";
            position: absolute;
            inset: auto 0 0;
            height: 130px;
            background: linear-gradient(transparent, var(--ink));
            pointer-events: none;
        }

        .banner-content {
            position: relative;
            z-index: 1;
            width: min(780px, 100%);
        }

        .banner-content h2 {
            margin: 18px 0 12px;
            color: var(--white);
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(30px, 5vw, 56px);
            line-height: 1.06;
            letter-spacing: -.045em;
        }

        .banner-content p {
            max-width: 690px;
            margin: 0;
            color: var(--muted);
            font-size: 16px;
        }

        .article-area {
            padding: 76px 0 92px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 720px) 300px;
            align-items: start;
            justify-content: space-between;
            gap: 64px;
        }

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

        .article-heading {
            padding-bottom: 28px;
            border-bottom: 1px solid var(--line);
        }

        .article-heading h1 {
            margin: 16px 0 18px;
            color: var(--white);
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(32px, 4.8vw, 52px);
            line-height: 1.08;
            letter-spacing: -.045em;
            overflow-wrap: anywhere;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px 18px;
            color: var(--muted);
            font-size: 13px;
        }

        .meta-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
        }

        .article-content {
            padding-top: 34px;
            color: #dce5f2;
            font-size: 16px;
        }

        .article-content > *:first-child {
            margin-top: 0;
        }

        .article-content h2,
        .article-content h3 {
            margin: 38px 0 14px;
            color: var(--white);
            font-family: "Space Grotesk", sans-serif;
            line-height: 1.2;
            letter-spacing: -.025em;
        }

        .article-content h2 {
            font-size: 28px;
        }

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

        .article-content p {
            margin: 0 0 20px;
        }

        .article-content ul,
        .article-content ol {
            margin: 18px 0 24px;
            padding-left: 23px;
        }

        .article-content li {
            margin: 8px 0;
            padding-left: 5px;
        }

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

        .article-content a {
            color: var(--cyan-soft);
            text-decoration: underline;
            text-decoration-color: rgba(140, 247, 255, .45);
            text-underline-offset: 3px;
        }

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

        .article-content blockquote {
            margin: 30px 0;
            padding: 22px 24px;
            color: #edfaff;
            background: linear-gradient(110deg, rgba(0, 82, 255, .16), rgba(0, 240, 255, .06));
            border-left: 3px solid var(--cyan);
            border-radius: 0 14px 14px 0;
        }

        .article-content img {
            width: 100%;
            margin: 28px 0;
            border: 1px solid var(--line-bright);
            border-radius: var(--radius-md);
        }

        .article-content table {
            width: 100%;
            margin: 25px 0;
            border-collapse: collapse;
            overflow: hidden;
            background: rgba(17, 24, 39, .7);
        }

        .article-content th,
        .article-content td {
            padding: 12px 14px;
            text-align: left;
            border: 1px solid var(--line);
        }

        .article-content th {
            color: var(--cyan-soft);
            background: rgba(0, 240, 255, .08);
        }

        .not-found {
            padding: 42px 30px;
            text-align: center;
            background: rgba(17, 24, 39, .7);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
        }

        .not-found h2 {
            margin: 0 0 10px;
            font-family: "Space Grotesk", sans-serif;
            font-size: 26px;
        }

        .not-found p {
            margin: 0 0 22px;
            color: var(--muted);
        }

        .side-stack {
            position: sticky;
            top: 108px;
            display: grid;
            gap: 18px;
        }

        .side-panel {
            padding: 22px;
            background: linear-gradient(145deg, rgba(21, 29, 45, .94), rgba(13, 17, 30, .9));
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: 0 18px 44px rgba(0, 0, 0, .18);
        }

        .side-panel h3 {
            margin: 0 0 12px;
            color: var(--white);
            font-family: "Space Grotesk", sans-serif;
            font-size: 19px;
            line-height: 1.25;
        }

        .side-panel p {
            margin: 0;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.65;
        }

        .side-image {
            width: 100%;
            height: 142px;
            object-fit: cover;
            margin: -22px -22px 19px;
            width: calc(100% + 44px);
            border-radius: 16px 16px 0 0;
            opacity: .86;
        }

        .side-list {
            display: grid;
            gap: 11px;
            margin-top: 17px;
        }

        .side-list a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 11px 0;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.45;
            border-top: 1px solid var(--line);
            transition: color .2s ease, padding-left .2s ease;
        }

        .side-list a:first-child {
            border-top: 0;
            padding-top: 0;
        }

        .side-list a:hover {
            padding-left: 5px;
            color: var(--cyan-soft);
        }

        .side-list a::before {
            content: "↗";
            color: var(--cyan);
            font-weight: 800;
        }

        .coupon-panel {
            position: relative;
            overflow: hidden;
            padding: 25px;
            background:
                linear-gradient(145deg, rgba(0, 82, 255, .82), rgba(9, 20, 48, .94)),
                url("/assets/images/coverpic/cover-7.jpg") center/cover;
            border: 1px solid rgba(140, 247, 255, .48);
        }

        .coupon-panel::before {
            content: "";
            position: absolute;
            width: 150px;
            height: 150px;
            right: -70px;
            top: -70px;
            border: 1px solid rgba(0, 240, 255, .35);
            border-radius: 50%;
            box-shadow: 0 0 0 18px rgba(0, 240, 255, .05), 0 0 0 38px rgba(0, 240, 255, .04);
        }

        .coupon-panel > * {
            position: relative;
            z-index: 1;
        }

        .coupon-label {
            display: inline-flex;
            padding: 5px 9px;
            color: var(--ink);
            background: var(--cyan);
            font-size: 10px;
            font-weight: 800;
            letter-spacing: .08em;
        }

        .coupon-value {
            margin: 16px 0 3px;
            color: #fff;
            font-family: "Space Grotesk", sans-serif;
            font-size: 30px;
            font-weight: 700;
        }

        .coupon-panel p {
            margin-bottom: 18px;
            color: #d8faff;
        }

        .coupon-panel .btn {
            width: 100%;
            color: var(--ink);
            background: var(--cyan);
            box-shadow: none;
        }

        .reading-note {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-top: 33px;
            padding: 17px 18px;
            color: var(--muted);
            background: rgba(245, 196, 81, .06);
            border: 1px solid rgba(245, 196, 81, .22);
            border-radius: 12px;
            font-size: 13px;
        }

        .reading-note strong {
            display: block;
            margin-bottom: 3px;
            color: var(--gold);
        }

        .reading-note span {
            color: var(--gold);
            font-size: 18px;
            line-height: 1.3;
        }

        .faq-section {
            padding: 80px 0;
            border-top: 1px solid var(--line);
        }

        .section-heading {
            display: grid;
            grid-template-columns: .8fr 1.2fr;
            align-items: end;
            gap: 35px;
            margin-bottom: 34px;
        }

        .section-heading h2 {
            margin: 15px 0 0;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(28px, 4vw, 42px);
            line-height: 1.1;
            letter-spacing: -.04em;
        }

        .section-heading p {
            max-width: 550px;
            margin: 0;
            color: var(--muted);
            font-size: 15px;
        }

        .faq-list {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 14px;
        }

        .faq-item {
            background: rgba(17, 24, 39, .62);
            border: 1px solid var(--line);
            border-radius: 14px;
            transition: border-color .25s ease, background .25s ease;
        }

        .faq-item:hover,
        .faq-item[open] {
            background: rgba(21, 29, 45, .92);
            border-color: var(--line-bright);
        }

        .faq-item summary {
            position: relative;
            padding: 19px 46px 19px 20px;
            color: var(--white);
            font-size: 14px;
            font-weight: 700;
            cursor: pointer;
            list-style: none;
        }

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

        .faq-item summary::after {
            content: "+";
            position: absolute;
            top: 16px;
            right: 19px;
            color: var(--cyan);
            font-size: 22px;
            font-weight: 400;
        }

        .faq-item[open] summary::after {
            content: "−";
        }

        .faq-answer {
            padding: 0 20px 20px;
            color: var(--muted);
            font-size: 13px;
        }

        .cta-section {
            padding: 30px 0 92px;
        }

        .cta-box {
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            padding: 38px 44px;
            background:
                linear-gradient(105deg, rgba(0, 82, 255, .82), rgba(11, 28, 58, .92)),
                url("/assets/images/backpic/back-3.jpg") center/cover;
            border: 1px solid var(--line-bright);
            clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
            box-shadow: var(--shadow);
        }

        .cta-box::after {
            content: "";
            position: absolute;
            width: 260px;
            height: 260px;
            right: 16%;
            top: -180px;
            border: 1px solid rgba(140, 247, 255, .26);
            border-radius: 50%;
            box-shadow: 0 0 0 28px rgba(140, 247, 255, .05), 0 0 0 58px rgba(140, 247, 255, .03);
        }

        .cta-copy,
        .cta-actions {
            position: relative;
            z-index: 1;
        }

        .cta-copy h2 {
            margin: 0 0 9px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(25px, 3vw, 36px);
            line-height: 1.15;
        }

        .cta-copy p {
            max-width: 620px;
            margin: 0;
            color: #d6e7ff;
            font-size: 14px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .cta-actions .btn-outline {
            color: #fff;
            border-color: rgba(255,255,255,.45);
            background: rgba(255,255,255,.08);
        }

        .site-footer {
            padding: 62px 0 24px;
            background: #06070c;
            border-top: 1px solid var(--line);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 35px;
        }

        .footer-brand .brand {
            min-width: 0;
            margin-bottom: 17px;
        }

        .footer-brand p {
            max-width: 310px;
            margin: 0;
            color: var(--muted);
            font-size: 13px;
        }

        .footer-title {
            margin: 3px 0 17px;
            color: var(--white);
            font-family: "Space Grotesk", sans-serif;
            font-size: 14px;
        }

        .footer-links {
            display: grid;
            gap: 10px;
            padding: 0;
            margin: 0;
            list-style: none;
        }

        .footer-links a {
            color: var(--muted);
            font-size: 12px;
            transition: color .2s ease, padding-left .2s ease;
        }

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

        .payment-line {
            display: flex;
            flex-wrap: wrap;
            gap: 7px;
        }

        .payment {
            padding: 7px 9px;
            color: #d8faff;
            background: rgba(0, 240, 255, .07);
            border: 1px solid var(--line-bright);
            border-radius: 7px;
            font-size: 11px;
            font-weight: 700;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 46px;
            padding-top: 18px;
            color: #758198;
            border-top: 1px solid var(--line);
            font-size: 11px;
        }

        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            display: grid;
            place-items: center;
            width: 58px;
            height: 58px;
            color: var(--cyan);
            background: rgba(0, 0, 0, .72);
            border: 1px solid var(--cyan);
            border-radius: 50%;
            box-shadow: 0 0 15px rgba(0, 240, 255, .5);
            opacity: .72;
            transition: transform .25s ease, opacity .25s ease, box-shadow .25s ease, color .25s ease;
            animation: fabFloat 3.5s ease-in-out infinite;
        }

        .fab:hover {
            opacity: 1;
            color: #fff;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0, 240, 255, .8);
        }

        .fab:active {
            transform: scale(.95) translateY(2px);
        }

        .fab-icon {
            font-size: 22px;
            line-height: 1;
        }

        .fab-dot {
            position: absolute;
            top: 4px;
            right: 3px;
            width: 9px;
            height: 9px;
            background: var(--danger);
            border: 2px solid var(--ink);
            border-radius: 50%;
            animation: blink 1.4s ease-in-out infinite;
        }

        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: .35; }
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 0;
            }

            .nav-link {
                padding-inline: 9px;
                font-size: 12px;
            }

            .brand {
                min-width: 220px;
            }

            .article-layout {
                grid-template-columns: minmax(0, 1fr) 270px;
                gap: 38px;
            }

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

        @media (max-width: 768px) {
            .container {
                width: min(100% - 30px, 720px);
            }

            .nav-wrap {
                min-height: 70px;
                gap: 10px;
            }

            .brand {
                min-width: 0;
                flex: 1 1 auto;
            }

            .brand-text {
                max-width: 205px;
                font-size: 12px;
            }

            .brand-text small {
                font-size: 9px;
            }

            .brand-mark {
                width: 35px;
                height: 35px;
                font-size: 17px;
            }

            .menu-toggle {
                display: block;
                order: 3;
            }

            .nav-links {
                position: absolute;
                top: 70px;
                left: 15px;
                right: 15px;
                display: none;
                flex-direction: column;
                align-items: stretch;
                padding: 9px;
                background: rgba(13, 17, 30, .98);
                border: 1px solid var(--line);
                border-radius: 14px;
                box-shadow: var(--shadow);
            }

            .nav-links.open {
                display: flex;
            }

            .nav-link {
                padding: 12px 14px;
                font-size: 13px;
            }

            .nav-link.active::after {
                left: 14px;
                right: auto;
                width: 24px;
                bottom: 5px;
            }

            .nav-actions {
                gap: 5px;
            }

            .nav-actions .btn {
                min-height: 38px;
                padding: 0 10px;
                font-size: 11px;
            }

            .page-banner {
                min-height: 330px;
                padding: 130px 0 55px;
            }

            .article-area {
                padding: 54px 0 70px;
            }

            .article-layout {
                display: block;
            }

            .side-stack {
                position: static;
                grid-template-columns: repeat(2, minmax(0, 1fr));
                margin-top: 48px;
            }

            .section-heading {
                display: block;
            }

            .section-heading p {
                margin-top: 15px;
            }

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

            .cta-box {
                display: block;
                padding: 31px 26px;
            }

            .cta-actions {
                margin-top: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                width: min(100% - 24px, 480px);
            }

            .brand-text {
                max-width: 145px;
                font-size: 10px;
            }

            .brand-text small {
                display: none;
            }

            .nav-actions .btn-outline {
                display: none;
            }

            .nav-actions .btn-primary {
                padding-inline: 9px;
                font-size: 10px;
            }

            .page-banner {
                min-height: 355px;
            }

            .banner-content h2 {
                font-size: 33px;
            }

            .article-heading h1 {
                font-size: 32px;
            }

            .article-content {
                font-size: 15px;
            }

            .side-stack {
                grid-template-columns: 1fr;
            }

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

            .footer-bottom {
                display: block;
            }

            .footer-bottom span {
                display: block;
                margin-bottom: 8px;
            }

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

/* roulang page: category3 */
:root {
            --ink: #08090f;
            --navy: #0d111e;
            --panel: #111827;
            --panel-soft: #151d2d;
            --blue: #0052ff;
            --cyan: #00f0ff;
            --cyan-soft: #8cf7ff;
            --white: #f8fbff;
            --muted: #aab5c8;
            --line: rgba(117,148,204,.22);
            --line-bright: rgba(0,240,255,.42);
            --gold: #f5c451;
            --danger: #ff5577;
            --radius-lg: 24px;
            --radius-md: 16px;
            --shadow: 0 22px 70px rgba(0,0,0,.34);
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--white);
            background:
                radial-gradient(circle at 78% 4%, rgba(0,82,255,.17), transparent 27rem),
                radial-gradient(circle at 6% 38%, rgba(0,240,255,.07), transparent 28rem),
                var(--ink);
            font-family: "Be Vietnam Pro", Arial, sans-serif;
            line-height: 1.65;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: .2;
            background-image:
                linear-gradient(rgba(0,240,255,.08) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0,240,255,.08) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: linear-gradient(to bottom,#000,transparent 85%);
        }
        a { color: inherit; text-decoration: none; }
        img { display: block; max-width: 100%; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        .container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 40;
            background: rgba(8,9,15,.86);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--line);
        }
        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 22px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 250px;
            font-family: "Space Grotesk", sans-serif;
            font-weight: 700;
            letter-spacing: -.03em;
        }
        .brand-mark {
            width: 40px; height: 40px;
            display: grid; place-items: center;
            color: var(--ink);
            background: linear-gradient(135deg,var(--cyan),var(--blue));
            clip-path: polygon(16% 0,100% 0,84% 100%,0 100%);
            font-size: 20px;
            box-shadow: 0 0 22px rgba(0,240,255,.3);
        }
        .brand-text { max-width: 280px; font-size: 14px; line-height: 1.25; }
        .brand-text small { color: var(--cyan-soft); font-size: 10px; font-weight: 600; letter-spacing: .02em; }
        .nav-links { display: flex; align-items: center; gap: 5px; }
        .nav-link {
            position: relative;
            padding: 10px 13px;
            color: var(--muted);
            font-size: 13px;
            font-weight: 600;
            transition: color .25s ease, background .25s ease;
        }
        .nav-link:hover, .nav-link.active { color: var(--white); background: rgba(0,240,255,.08); }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 13px; right: 13px; bottom: 3px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
        }
        .nav-actions { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
        .menu-toggle {
            display: none;
            width: 42px; height: 42px;
            color: var(--white);
            border: 1px solid var(--line);
            background: var(--panel);
            border-radius: 10px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 0 20px;
            border: 1px solid transparent;
            font-size: 13px;
            font-weight: 800;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
        }
        .btn:hover { transform: translateY(-2px); }
        .btn:active { transform: translateY(1px) scale(.98); }
        .btn:focus-visible, .nav-link:focus-visible, input:focus-visible, .faq-question:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
        }
        .btn-primary {
            color: #fff;
            background: linear-gradient(110deg,#0052ff,#008eff);
            box-shadow: 0 10px 28px rgba(0,82,255,.28);
            clip-path: polygon(8px 0,100% 0,calc(100% - 8px) 100%,0 100%);
        }
        .btn-primary:hover { box-shadow: 0 14px 36px rgba(0,240,255,.3); }
        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-bright);
            background: rgba(0,240,255,.04);
        }
        .btn-outline:hover { background: rgba(0,240,255,.12); }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--cyan);
            font-size: 11px;
            font-weight: 800;
            letter-spacing: .14em;
            text-transform: uppercase;
        }
        .eyebrow::before {
            content: "";
            width: 24px; height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
        }
        .hero {
            position: relative;
            min-height: 610px;
            padding: 154px 0 76px;
            background:
                linear-gradient(90deg,rgba(8,9,15,.96) 0%,rgba(8,9,15,.74) 50%,rgba(8,9,15,.42) 100%),
                url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
            border-bottom: 1px solid var(--line);
        }
        .hero::after {
            content: "";
            position: absolute;
            inset: auto 0 0;
            height: 170px;
            background: linear-gradient(transparent,var(--ink));
            pointer-events: none;
        }
        .hero-inner { position: relative; z-index: 1; }
        .hero-copy { max-width: 820px; margin: 0 auto; text-align: center; }
        .hero-copy h1 {
            margin: 18px 0 18px;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(34px,5vw,64px);
            line-height: 1.08;
            letter-spacing: -.055em;
        }
        .hero-copy h1 span { color: var(--cyan); text-shadow: 0 0 26px rgba(0,240,255,.3); }
        .hero-copy p { max-width: 700px; margin: 0 auto; color: var(--muted); font-size: 16px; }
        .search-panel {
            max-width: 760px;
            margin: 32px auto 0;
            padding: 8px;
            display: flex;
            gap: 8px;
            background: rgba(13,17,30,.88);
            border: 1px solid var(--line-bright);
            box-shadow: 0 0 34px rgba(0,240,255,.12);
        }
        .search-panel input {
            min-width: 0;
            flex: 1;
            padding: 0 16px;
            color: var(--white);
            background: transparent;
            border: 0;
        }
        .search-panel input::placeholder { color: #77849a; }
        .quick-links {
            margin: 24px auto 0;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 9px;
        }
        .quick-links a {
            padding: 8px 13px;
            color: var(--cyan-soft);
            border: 1px solid rgba(0,240,255,.24);
            background: rgba(0,240,255,.06);
            font-size: 12px;
            transition: .25s ease;
        }
        .quick-links a:hover { color: #fff; background: rgba(0,240,255,.16); transform: translateY(-2px); }
        .hero-note { margin-top: 20px; color: #8190a8; font-size: 12px; }
        .section { padding: 92px 0; }
        .section-sm { padding: 58px 0; }
        .section-heading {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 30px;
            margin-bottom: 35px;
        }
        .section-heading h2 {
            margin: 10px 0 0;
            font-family: "Space Grotesk", sans-serif;
            font-size: clamp(27px,3.4vw,43px);
            line-height: 1.15;
            letter-spacing: -.045em;
        }
        .section-heading p { max-width: 480px; margin: 0; color: var(--muted); font-size: 14px; }
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4,1fr);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }
        .stat {
            padding: 25px 20px;
            border-right: 1px solid var(--line);
        }
        .stat:last-child { border-right: 0; }
        .stat strong {
            display: block;
            color: var(--cyan);
            font-family: "Space Grotesk", sans-serif;
            font-size: 29px;
            line-height: 1.1;
        }
        .stat span { display: block; margin-top: 7px; color: var(--muted); font-size: 12px; }
        .feature-layout {
            display: grid;
            grid-template-columns: .8fr 1.2fr;
            gap: 48px;
            align-items: start;
        }
        .feature-intro { position: sticky; top: 120px; }
        .feature-intro h2 { margin: 12px 0 15px; font: 700 clamp(28px,3.4vw,42px)/1.15 "Space Grotesk",sans-serif; letter-spacing: -.05em; }
        .feature-intro p { color: var(--muted); font-size: 14px; }
        .feature-list { display: grid; gap: 1px; background: var(--line); }
        .feature-item {
            display: grid;
            grid-template-columns: 58px 1fr;
            gap: 18px;
            padding: 25px;
            background: rgba(17,24,39,.88);
            transition: background .25s ease, transform .25s ease;
        }
        .feature-item:hover { background: #162238; transform: translateX(5px); }
        .feature-icon {
            width: 46px; height: 46px;
            display: grid; place-items: center;
            color: var(--cyan);
            border: 1px solid var(--line-bright);
            background: rgba(0,240,255,.08);
            font-family: "Space Grotesk",sans-serif;
            font-weight: 700;
        }
        .feature-item h3 { margin: 0 0 5px; font-size: 17px; }
        .feature-item p { margin: 0; color: var(--muted); font-size: 13px; }
        .data-board {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 24px;
            align-items: stretch;
        }
        .board-main {
            min-height: 330px;
            position: relative;
            overflow: hidden;
            padding: 30px;
            background:
                linear-gradient(135deg,rgba(0,82,255,.24),rgba(17,24,39,.88)),
                url("/assets/images/coverpic/cover-7.jpg") center/cover;
            border: 1px solid var(--line-bright);
        }
        .board-main::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(transparent 72%,rgba(8,9,15,.9));
        }
        .board-main > * { position: relative; z-index: 1; }
        .board-main h3 { max-width: 440px; margin: 20px 0 10px; font: 700 30px/1.2 "Space Grotesk",sans-serif; }
        .board-main p { max-width: 450px; color: #cbd5e1; font-size: 14px; }
        .live-label { display: inline-flex; align-items: center; gap: 8px; color: #c6ffcf; font-size: 11px; font-weight: 800; }
        .live-label::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #48e879; box-shadow: 0 0 12px #48e879; }
        .board-side { display: grid; gap: 12px; }
        .metric-box {
            padding: 22px;
            background: var(--panel);
            border-left: 2px solid var(--cyan);
            box-shadow: var(--shadow);
        }
        .metric-box .metric-top { display: flex; justify-content: space-between; gap: 15px; color: var(--muted); font-size: 12px; }
        .metric-box strong { display: block; margin: 13px 0 2px; font: 700 27px/1.1 "Space Grotesk",sans-serif; }
        .metric-box em { color: #72f29a; font-size: 11px; font-style: normal; }
        .bar { height: 5px; margin-top: 15px; overflow: hidden; background: #263247; }
        .bar i { display: block; height: 100%; background: linear-gradient(90deg,var(--blue),var(--cyan)); }
        .comparison {
            display: grid;
            grid-template-columns: repeat(3,1fr);
            gap: 16px;
        }
        .compare-item {
            padding: 24px;
            background: rgba(17,24,39,.76);
            border: 1px solid var(--line);
            transition: border-color .25s ease, transform .25s ease;
        }
        .compare-item:hover { border-color: var(--line-bright); transform: translateY(-4px); }
        .compare-item h3 { margin: 0 0 13px; font-size: 17px; }
        .compare-item p { min-height: 65px; margin: 0 0 20px; color: var(--muted); font-size: 13px; }
        .compare-item a { color: var(--cyan); font-size: 12px; font-weight: 800; }
        .compare-item a:hover { color: #fff; }
        .steps {
            display: grid;
            grid-template-columns: repeat(4,1fr);
            gap: 0;
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }
        .step { position: relative; padding: 24px 22px 25px; border-right: 1px solid var(--line); }
        .step:last-child { border-right: 0; }
        .step-number { color: var(--cyan); font: 700 13px "Space Grotesk",sans-serif; }
        .step h3 { margin: 11px 0 7px; font-size: 15px; }
        .step p { margin: 0; color: var(--muted); font-size: 12px; }
        .faq-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 58px; }
        .faq-intro h2 { margin: 12px 0 14px; font: 700 clamp(28px,3.4vw,42px)/1.15 "Space Grotesk",sans-serif; letter-spacing: -.05em; }
        .faq-intro p { color: var(--muted); font-size: 14px; }
        .faq-list { border-top: 1px solid var(--line); }
        .faq-item { border-bottom: 1px solid var(--line); }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding: 20px 0;
            color: var(--white);
            background: transparent;
            border: 0;
            text-align: left;
            font-size: 15px;
            font-weight: 700;
        }
        .faq-question span:last-child { color: var(--cyan); font-size: 20px; transition: transform .25s ease; }
        .faq-answer { max-height: 0; overflow: hidden; color: var(--muted); font-size: 13px; transition: max-height .3s ease, padding .3s ease; }
        .faq-item.open .faq-answer { max-height: 180px; padding: 0 36px 20px 0; }
        .faq-item.open .faq-question span:last-child { transform: rotate(45deg); }
        .cta-panel {
            position: relative;
            overflow: hidden;
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 35px;
            align-items: center;
            padding: 46px;
            background:
                linear-gradient(105deg,rgba(0,82,255,.8),rgba(0,150,210,.35)),
                url("/assets/images/backpic/back-3.jpg") center/cover;
            border: 1px solid rgba(0,240,255,.6);
            box-shadow: 0 20px 65px rgba(0,82,255,.2);
        }
        .cta-panel h2 { margin: 0 0 12px; font: 700 clamp(27px,3.4vw,42px)/1.15 "Space Grotesk",sans-serif; letter-spacing: -.05em; }
        .cta-panel p { max-width: 650px; margin: 0; color: #dceeff; font-size: 14px; }
        .cta-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 10px; }
        .cta-actions .btn-outline { color: #fff; border-color: rgba(255,255,255,.55); background: rgba(0,0,0,.18); }
        .notice {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-top: 24px;
            padding: 17px 19px;
            color: var(--muted);
            background: rgba(245,196,81,.06);
            border: 1px solid rgba(245,196,81,.2);
            font-size: 12px;
        }
        .notice strong { color: var(--gold); white-space: nowrap; }
        .site-footer { padding: 66px 0 25px; background: #070910; border-top: 1px solid var(--line); }
        .footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 38px; }
        .footer-brand .brand { min-width: 0; }
        .footer-brand p { max-width: 300px; margin: 20px 0 0; color: var(--muted); font-size: 12px; }
        .footer-title { margin: 5px 0 17px; color: var(--white); font-size: 13px; }
        .footer-links { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
        .footer-links a { color: var(--muted); font-size: 12px; transition: color .2s ease; }
        .footer-links a:hover { color: var(--cyan); }
        .payment-line { display: flex; flex-wrap: wrap; gap: 7px; }
        .payment {
            padding: 7px 9px;
            color: var(--cyan-soft);
            border: 1px solid var(--line);
            background: var(--panel);
            font-size: 11px;
            font-weight: 700;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 50px;
            padding-top: 22px;
            color: #68758a;
            border-top: 1px solid var(--line);
            font-size: 11px;
        }
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            min-width: 58px;
            height: 50px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 0 16px;
            color: var(--cyan);
            background: rgba(0,0,0,.72);
            backdrop-filter: blur(12px);
            border: 1px solid transparent;
            clip-path: polygon(8px 0,100% 0,calc(100% - 8px) 100%,0 100%);
            box-shadow: 0 0 15px rgba(0,240,255,.5);
            opacity: .72;
            animation: breathe 3s ease-in-out infinite;
            transition: .25s ease;
        }
        .fab::before {
            content: "";
            position: absolute;
            inset: -1px;
            z-index: -1;
            background: linear-gradient(120deg,var(--cyan),var(--blue),#b000ff,var(--cyan));
            background-size: 240% 100%;
            animation: flow 4s linear infinite;
        }
        .fab:hover { opacity: 1; transform: scale(1.08); box-shadow: 0 0 28px rgba(0,240,255,.8); }
        .fab:active { transform: scale(.95); }
        .fab-icon { font-size: 20px; }
        .fab-label { font-size: 11px; font-weight: 800; }
        .fab-dot { position: absolute; top: 5px; right: 5px; width: 7px; height: 7px; border-radius: 50%; background: var(--danger); box-shadow: 0 0 10px var(--danger); animation: blink 1.4s infinite; }
        @keyframes breathe { 0%,100% { opacity: .65; } 50% { opacity: .9; } }
        @keyframes flow { from { background-position: 0 0; } to { background-position: 240% 0; } }
        @keyframes blink { 50% { opacity: .25; } }
        @media (max-width: 1024px) {
            .nav-links { gap: 0; }
            .nav-link { padding-inline: 9px; font-size: 12px; }
            .nav-actions .btn { padding-inline: 13px; }
            .feature-layout, .faq-layout { gap: 30px; }
        }
        @media (max-width: 820px) {
            .nav-wrap { min-height: 70px; }
            .brand { min-width: 0; }
            .brand-text { max-width: 205px; font-size: 12px; }
            .nav-links {
                position: absolute;
                top: 70px; left: 20px; right: 20px;
                display: none;
                flex-direction: column;
                align-items: stretch;
                padding: 10px;
                background: rgba(13,17,30,.98);
                border: 1px solid var(--line);
                box-shadow: var(--shadow);
            }
            .nav-links.is-open { display: flex; }
            .nav-link { padding: 13px; }
            .nav-link.active::after { left: 13px; right: auto; width: 24px; bottom: 7px; }
            .menu-toggle { display: block; }
            .nav-actions { margin-left: auto; }
            .nav-actions .btn { min-height: 40px; padding-inline: 11px; font-size: 11px; }
            .hero { min-height: 590px; padding-top: 130px; }
            .stats-strip { grid-template-columns: repeat(2,1fr); }
            .stat:nth-child(2) { border-right: 0; }
            .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
            .feature-layout, .data-board, .faq-layout, .cta-panel { grid-template-columns: 1fr; }
            .feature-intro { position: static; }
            .board-side { grid-template-columns: repeat(3,1fr); }
            .metric-box { padding: 17px; }
            .metric-box strong { font-size: 22px; }
            .steps { grid-template-columns: repeat(2,1fr); }
            .step:nth-child(2) { border-right: 0; }
            .step:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
            .cta-actions { justify-content: flex-start; }
            .footer-grid { grid-template-columns: repeat(2,1fr); }
        }
        @media (max-width: 520px) {
            .container { width: min(100% - 28px, 1160px); }
            .brand-mark { width: 34px; height: 34px; font-size: 16px; }
            .brand-text { max-width: 145px; font-size: 10px; }
            .brand-text small { font-size: 8px; }
            .nav-actions { gap: 4px; }
            .nav-actions .btn-outline { display: none; }
            .nav-actions .btn-primary { padding-inline: 10px; }
            .menu-toggle { width: 38px; height: 38px; }
            .hero { min-height: 650px; padding: 125px 0 60px; }
            .hero-copy h1 { font-size: 35px; }
            .hero-copy p { font-size: 14px; }
            .search-panel { display: block; padding: 7px; }
            .search-panel input { width: 100%; height: 46px; }
            .search-panel .btn { width: 100%; }
            .section { padding: 66px 0; }
            .section-heading { display: block; }
            .section-heading p { margin-top: 16px; }
            .stats-strip { grid-template-columns: 1fr 1fr; }
            .stat { padding: 18px 13px; }
            .stat strong { font-size: 22px; }
            .feature-item { grid-template-columns: 42px 1fr; padding: 20px 16px; gap: 12px; }
            .feature-icon { width: 38px; height: 38px; font-size: 12px; }
            .board-main { min-height: 360px; padding: 23px; }
            .board-main h3 { font-size: 25px; }
            .board-side { grid-template-columns: 1fr; }
            .comparison { grid-template-columns: 1fr; }
            .compare-item p { min-height: auto; }
            .steps { grid-template-columns: 1fr; }
            .step, .step:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
            .step:last-child { border-bottom: 0; }
            .cta-panel { padding: 28px 22px; }
            .cta-actions .btn { width: 100%; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { display: block; }
            .footer-bottom span { display: block; margin-top: 8px; }
            .fab { bottom: 78px; left: 12px; }
        }