/* roulang page: index */
:root {
        --bg: #0F0C20;
        --ocean: #0B1A30;
        --lime: #CCFF00;
        --cyan: #00F0FF;
        --text: #FFFFFF;
        --muted: #A6ACAF;
        --border: rgba(0, 240, 255, .18);
        --glow: rgba(0, 240, 255, .35);
        --radius: 18px;
        --shadow: 0 20px 50px rgba(0, 0, 0, .45);
      }
      * { margin: 0; padding: 0; box-sizing: border-box; }
      html { scroll-behavior: smooth; }
      body {
        font-family: 'Be Vietnam Pro', system-ui, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.6;
        padding-bottom: 90px;
        overflow-x: hidden;
      }
      a { color: inherit; text-decoration: none; }
      img { max-width: 100%; display: block; }
      button, input, textarea, select { font: inherit; }
      .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

      .section { padding: 72px 0; position: relative; }
      .section-head { max-width: 720px; margin-bottom: 40px; }
      .kicker {
        display: inline-flex; align-items: center; gap: 8px;
        font-size: .78rem; font-weight: 700; letter-spacing: .06em;
        text-transform: uppercase; color: var(--lime);
        background: rgba(204, 255, 0, .08);
        border: 1px solid rgba(204, 255, 0, .22);
        padding: 6px 12px; border-radius: 999px; margin-bottom: 14px;
      }
      .section-title { font-size: clamp(1.6rem, 3vw, 2.4rem); line-height: 1.25; font-weight: 800; }
      .section-sub { color: var(--muted); font-size: 1rem; margin-top: 12px; }

      .header {
        position: sticky; top: 0; z-index: 60;
        background: rgba(15, 12, 32, .85);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(0, 240, 255, .12);
      }
      .nav-container { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 20px; max-width: 1200px; margin: 0 auto; }
      .logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.1rem; color: #fff; }
      .logo i { color: var(--lime); font-size: 1.5rem; filter: drop-shadow(0 0 6px rgba(204, 255, 0, .6)); }
      .desktop-nav { display: none; align-items: center; gap: 26px; }
      .nav-link { color: var(--muted); font-weight: 600; font-size: .95rem; transition: color .2s; position: relative; }
      .nav-link:hover, .nav-link.active { color: var(--cyan); }
      .nav-link.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
      .auth-btns { display: flex; align-items: center; gap: 8px; margin-left: auto; }
      .btn-ghost {
        display: inline-flex; align-items: center; justify-content: center;
        padding: 9px 14px; border-radius: 10px; border: 1px solid var(--border);
        color: #fff; font-weight: 600; font-size: .88rem; transition: .2s;
      }
      .btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
      .btn-primary {
        display: inline-flex; align-items: center; justify-content: center; gap: 8px;
        padding: 10px 16px; border-radius: 10px; background: var(--lime); color: #0F0C20;
        font-weight: 800; font-size: .9rem; box-shadow: 0 0 18px rgba(204, 255, 0, .35);
        transition: .2s; border: none; cursor: pointer;
      }
      .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 26px rgba(204, 255, 0, .55); }
      .btn-primary:active { transform: translateY(0); }
      .menu-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border); color: #fff; background: rgba(255,255,255,.04); cursor: pointer; }
      .mobile-menu { display: none; padding: 14px 20px 18px; border-top: 1px solid rgba(0,240,255,.1); background: rgba(15,12,32,.95); }
      .mobile-menu.open { display: block; }
      .mobile-nav-link { display: block; padding: 12px 0; color: var(--muted); font-weight: 600; border-bottom: 1px solid rgba(255,255,255,.05); }
      .mobile-nav-link:hover { color: var(--cyan); }

      .hero { position: relative; min-height: 88vh; display: flex; align-items: center; background: #0F0C20; overflow: hidden; }
      .hero-bg {
        position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.jpg');
        background-size: cover; background-position: center; opacity: .28; z-index: 0;
      }
      .hero-overlay {
        position: absolute; inset: 0; z-index: 1;
        background: linear-gradient(135deg, rgba(15,12,32,.95) 0%, rgba(11,26,48,.8) 52%, rgba(0,240,255,.14) 100%);
      }
      .hero > .container { position: relative; z-index: 2; }
      .hero-badge {
        display: inline-flex; align-items: center; gap: 8px; background: rgba(0,240,255,.08);
        border: 1px solid rgba(0,240,255,.25); color: var(--cyan); 
        padding: 7px 12px; border-radius: 999px; font-size: .78rem; font-weight: 700; letter-spacing: .05em;
      }
      .hero-title { font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.18; font-weight: 800; margin: 20px 0; text-shadow: 0 0 30px rgba(0,240,255,.25); }
      .hero-desc { color: #C9CDD3; font-size: 1.05rem; max-width: 620px; margin: 0 0 28px; }
      .hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
      .btn-cyan {
        display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px;
        background: var(--cyan); color: #0B1A30; font-weight: 800; font-size: .95rem;
        box-shadow: 0 0 20px rgba(0,240,255,.4); transition: .2s; border: none; cursor: pointer;
      }
      .btn-cyan:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(0,240,255,.7); }
      .btn-outline {
        display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px;
        border: 1px solid rgba(0,240,255,.35); color: #fff; font-weight: 700; font-size: .95rem;
        transition: .2s; background: rgba(255,255,255,.03);
      }
      .btn-outline:hover { background: rgba(0,240,255,.1); border-color: var(--cyan); }
      .hero-stats { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 30px; }
      .hero-stat { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: 14px; padding: 12px 16px; min-width: 120px; }
      .hero-stat .number { color: var(--lime); font-weight: 800; font-size: 1.3rem; }
      .hero-stat .label { font-size: .78rem; color: var(--muted); }
      .poster-card { position: relative; border-radius: 22px; overflow: hidden; border: 1px solid rgba(0,240,255,.25); box-shadow: 0 30px 60px rgba(0,0,0,.6); }
      .poster-card img { width: 100%; height: 100%; object-fit: cover; min-height: 380px; }
      .poster-glow { position: absolute; inset: 0; background: radial-gradient(circle at 80% 20%, rgba(0,240,255,.25), transparent 55%); }
      .heat-badge {
        position: absolute; top: 16px; left: 16px; z-index: 5; background: #D32F2F; color: #fff;
        font-size: .72rem; font-weight: 800; padding: 6px 10px; border-radius: 8px;
        display: inline-flex; align-items: center; gap: 6px; box-shadow: 0 0 16px rgba(211,47,47,.5);
      }
      .poster-caption { position: absolute; bottom: 0; left: 0; right: 0; padding: 18px; background: linear-gradient(transparent, rgba(15,12,32,.95)); }
      .poster-caption h3 { font-size: 1.2rem; font-weight: 800; }
      .poster-caption p { color: var(--muted); font-size: .85rem; }

      .sell-grid { display: grid; grid-template-columns: repeat(1, 1fr); gap: 18px; }
      .sell-card {
        background: linear-gradient(145deg, rgba(255,255,255,.05), rgba(11,26,48,.8));
        border: 1px solid rgba(0,240,255,.14); border-radius: var(--radius);
        padding: 24px; transition: .25s; position: relative; overflow: hidden;
      }
      .sell-card:hover { border-color: rgba(0,240,255,.45); transform: translateY(-4px); box-shadow: 0 0 30px rgba(0,240,255,.12); }
      .sell-icon {
        width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
        background: rgba(204,255,0,.1); border: 1px solid rgba(204,255,0,.25); color: var(--lime); font-size: 1.2rem; margin-bottom: 16px;
      }
      .sell-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
      .sell-card p { color: var(--muted); font-size: .95rem; }

      .game-grid { display: grid; grid-template-columns: repeat(1, 1fr); gap: 18px; }
      .game-card {
        border-radius: var(--radius); overflow: hidden; background: #0B1A30; position: relative;
        border: 1px solid rgba(0,240,255,.14); transition: .3s;
      }
      .game-card:hover { border-color: rgba(204,255,0,.5); transform: translateY(-6px) scale(1.01); box-shadow: 0 20px 40px rgba(0,0,0,.5); }
      .game-card img { height: 180px; width: 100%; object-fit: cover; }
      .game-card-body { padding: 16px; }
      .game-card-body h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
      .game-card-body p { color: var(--muted); font-size: .83rem; margin-bottom: 14px; }
      .game-tag {
        position: absolute; top: 12px; right: 12px; background: var(--lime); color: #0F0C20;
        font-size: .68rem; font-weight: 800; padding: 4px 8px; border-radius: 6px; text-transform: uppercase;
      }
      .btn-mini {
        display: inline-flex; align-items: center; gap: 6px; background: rgba(0,240,255,.12); color: var(--cyan);
        border: 1px solid rgba(0,240,255,.25); padding: 7px 12px; border-radius: 8px; font-size: .82rem; font-weight: 700; transition: .2s;
      }
      .btn-mini:hover { background: rgba(0,240,255,.22); }

      .scene-wrap { display: grid; grid-template-columns: 1fr; gap: 30px; align-items: center; }
      .step-list { display: grid; gap: 16px; }
      .step-item { display: flex; gap: 16px; align-items: flex-start; background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08); border-radius: 14px; padding: 16px; }
      .step-num { width: 36px; height: 36px; flex: 0 0 36px; border-radius: 10px; background: var(--lime); color: #0F0C20; font-weight: 800; display: flex; align-items: center; justify-content: center; }
      .step-item h3 { font-weight: 700; font-size: 1rem; margin-bottom: 4px; }
      .step-item p { color: var(--muted); font-size: .9rem; }

      .feature-grid { display: grid; grid-template-columns: 1fr; gap: 26px; }
      .feature-block { padding: 22px; border-left: 3px solid var(--cyan); background: rgba(255,255,255,.04); border-radius: 0 14px 14px 0; }
      .feature-block h3 { font-size: 1.15rem; font-weight: 700; color: var(--cyan); margin-bottom: 8px; }
      .feature-block p { color: var(--muted); }

      .stats-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
      .stat-card { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: 16px; padding: 20px; text-align: left; }
      .stat-card .stat-number { font-size: 1.8rem; font-weight: 800; color: var(--lime); }
      .stat-card .stat-label { color: var(--muted); font-size: .88rem; }

      .news-layout { display: grid; grid-template-columns: 1fr; gap: 24px; }
      .news-list { display: flex; flex-direction: column; }
      .news-item {
        display: flex; gap: 14px; align-items: flex-start; padding: 16px 0;
        border-bottom: 1px solid rgba(255,255,255,.08); transition: .2s;
      }
      .news-item:hover { padding-left: 8px; }
      .news-icon { width: 42px; height: 42px; flex: 0 0 42px; border-radius: 10px; background: rgba(204,255,0,.1); color: var(--lime); display: flex; align-items: center; justify-content: center; }
      .news-item h3 { font-size: .98rem; font-weight: 600; line-height: 1.4; }
      .news-item .news-meta { color: var(--muted); font-size: .78rem; margin-top: 4px; }
      .news-sidebar { display: flex; flex-direction: column; gap: 16px; }
      .side-card { background: rgba(0,240,255,.05); border: 1px solid rgba(0,240,255,.18); border-radius: 16px; padding: 18px; }
      .side-card h3 { font-weight: 700; margin-bottom: 6px; font-size: 1rem; }
      .side-card p { color: var(--muted); font-size: .88rem; }

      .faq-list { display: flex; flex-direction: column; gap: 10px; max-width: 820px; }
      .faq-item { border: 1px solid rgba(0,240,255,.15); border-radius: 14px; background: rgba(255,255,255,.04); overflow: hidden; }
      .faq-question {
        width: 100%; text-align: left; padding: 16px 18px; display: flex; justify-content: space-between; align-items: center;
        font-weight: 700; font-size: .98rem; background: transparent; border: none; color: #fff; cursor: pointer;
      }
      .faq-question span { transition: .2s; color: var(--cyan); }
      .faq-answer { max-height: 0; overflow: hidden; transition: max-height .3s ease; padding: 0 18px; color: var(--muted); font-size: .92rem; }
      .faq-answer.open { max-height: 200px; padding-bottom: 16px; }

      .footer { background: #08060F; border-top: 1px solid rgba(0,240,255,.12); padding: 50px 0 30px; }
      .footer-grid { display: grid; grid-template-columns: 1fr; gap: 30px; }
      .footer-brand h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: 10px; }
      .footer-brand p { color: var(--muted); font-size: .9rem; }
      .footer h4 { font-weight: 700; font-size: .98rem; margin-bottom: 12px; color: #fff; }
      .footer-link { display: block; color: var(--muted); font-size: .9rem; padding: 4px 0; transition: .2s; }
      .footer-link:hover { color: var(--cyan); }
      .pay-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
      .pay-badge { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); padding: 6px 10px; border-radius: 8px; font-size: .78rem; color: var(--muted); }

      .conversion-bar {
        position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
        width: calc(100% - 32px); max-width: 1100px; z-index: 70;
        background: rgba(15,12,32,.95); backdrop-filter: blur(14px);
        border: 1px solid rgba(204,255,0,.3); border-radius: 18px;
        padding: 12px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px;
        box-shadow: 0 20px 40px rgba(0,0,0,.65);
      }
      .conversion-text { font-size: .9rem; font-weight: 600; }
      .conversion-text b { color: var(--lime); }
      .conversion-actions { display: flex; gap: 8px; flex-shrink: 0; }

      .fab-neon {
        position: fixed; left: 16px; bottom: 96px; z-index: 70;
        width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
        background: rgba(0,0,0,.6); backdrop-filter: blur(10px);
        border: 1px solid rgba(0,240,255,.55);
        box-shadow: 0 0 15px rgba(0,240,255,.5), 0 4px 20px rgba(0,0,0,.6);
        color: var(--cyan); font-size: 1.2rem; cursor: pointer; transition: .2s; animation: fabBreath 2.8s infinite;
      }
      .fab-neon:hover { opacity: 1; transform: scale(1.1); box-shadow: 0 0 26px rgba(0,240,255,.85); }
      @keyframes fabBreath { 0%,100% { opacity: .68; } 50% { opacity: 1; } }

      @media (min-width: 640px) {
        .sell-grid { grid-template-columns: repeat(3, 1fr); }
        .game-grid { grid-template-columns: repeat(2, 1fr); }
        .stats-row { grid-template-columns: repeat(4, 1fr); }
        .desktop-nav { display: flex; }
        .menu-btn { display: none; }
      }
      @media (min-width: 768px) {
        .section { padding: 88px 0; }
        .hero-badge { font-size: .85rem; }
        .conversion-text { font-size: 1rem; }
        .step-list { grid-template-columns: 1fr; }
        .feature-grid { grid-template-columns: 1fr 1fr; }
        .news-layout { grid-template-columns: 1.7fr .9fr; }
        .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
      }
      @media (max-width: 639px) {
        .hero { min-height: auto; padding: 60px 0; }
        .conversion-bar { flex-direction: column; align-items: stretch; text-align: center; }
        .conversion-actions { justify-content: center; }
        .auth-btns .btn-ghost { display: none; }
        .desktop-nav { display: none; }
      }
      :focus-visible { outline: 2px solid var(--lime); outline-offset: 2px; }

/* roulang page: category1 */
:root {
            --bg: #0F0C20;
            --ocean: #0B1A30;
            --lime: #CCFF00;
            --cyan: #00F0FF;
            --text: #FFFFFF;
            --muted: #A6ACAF;
            --border: rgba(0, 240, 255, .18);
            --glow: rgba(0, 240, 255, .35);
            --radius: 18px;
            --shadow: 0 20px 50px rgba(0, 0, 0, .45);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Be Vietnam Pro', system-ui, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            padding-bottom: 90px;
            overflow-x: hidden;
        }

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: 72px 0;
            position: relative;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            line-height: 1.25;
            font-weight: 800;
        }

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

        .header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(15, 12, 32, .85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 240, 255, .12);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
        }

        .logo i {
            color: var(--lime);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 6px rgba(204, 255, 0, .6));
        }

        .desktop-nav {
            display: none;
            align-items: center;
            gap: 22px;
        }

        .nav-link {
            color: var(--muted);
            font-weight: 600;
            font-size: .91rem;
            transition: color .2s;
            position: relative;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--cyan);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -6px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
        }

        .auth-btns {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 14px;
            border-radius: 10px;
            border: 1px solid var(--border);
            color: #fff;
            font-weight: 600;
            font-size: .88rem;
            transition: .2s;
            background: transparent;
            cursor: pointer;
        }

        .btn-ghost:hover {
            border-color: var(--cyan);
            color: var(--cyan);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 16px;
            border-radius: 10px;
            background: var(--lime);
            color: #0F0C20;
            font-weight: 800;
            font-size: .9rem;
            box-shadow: 0 0 18px rgba(204, 255, 0, .35);
            transition: .2s;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 26px rgba(204, 255, 0, .55);
        }

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

        .btn-cyan {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: 12px;
            background: var(--cyan);
            color: #0B1A30;
            font-weight: 800;
            font-size: .95rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, .4);
            transition: .2s;
            border: none;
            cursor: pointer;
        }

        .btn-cyan:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, .7);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: 12px;
            border: 1px solid rgba(0, 240, 255, .35);
            color: #fff;
            font-weight: 700;
            font-size: .95rem;
            transition: .2s;
            background: rgba(255, 255, 255, .03);
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, .1);
            border-color: var(--cyan);
        }

        .menu-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--border);
            color: #fff;
            background: rgba(255, 255, 255, .04);
            cursor: pointer;
        }

        .mobile-menu {
            display: none;
            padding: 14px 20px 18px;
            border-top: 1px solid rgba(0, 240, 255, .1);
            background: rgba(15, 12, 32, .95);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-nav-link {
            display: block;
            padding: 12px 0;
            color: var(--muted);
            font-weight: 600;
            border-bottom: 1px solid rgba(255, 255, 255, .05);
            transition: color .2s;
        }

        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            color: var(--cyan);
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            background: #0F0C20;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: .25;
            z-index: 0;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(135deg, rgba(15, 12, 32, .96) 0%, rgba(11, 26, 48, .82) 55%, rgba(0, 240, 255, .13) 100%);
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, .08);
            border: 1px solid rgba(0, 240, 255, .25);
            color: var(--cyan);
            padding: 7px 12px;
            border-radius: 999px;
            font-size: .78rem;
            font-weight: 700;
            letter-spacing: .05em;
        }

        .hero-title {
            font-size: clamp(1.9rem, 4.5vw, 3.3rem);
            line-height: 1.18;
            font-weight: 800;
            margin: 20px 0 16px;
            text-shadow: 0 0 30px rgba(0, 240, 255, .25);
        }

        .hero-question {
            color: var(--lime);
            font-size: clamp(1.1rem, 2vw, 1.35rem);
            font-weight: 700;
            margin-bottom: 14px;
        }

        .hero-desc {
            color: #C9CDD3;
            font-size: 1.02rem;
            max-width: 600px;
            margin: 0 0 24px;
            line-height: 1.65;
        }

        .lead-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: stretch;
            max-width: 560px;
            margin-top: 24px;
        }

        .lead-input {
            flex: 1 1 260px;
            padding: 13px 16px;
            border-radius: 12px;
            border: 1px solid rgba(0, 240, 255, .3);
            background: rgba(255, 255, 255, .06);
            color: #fff;
            font-size: .95rem;
            outline: none;
            transition: border-color .25s, box-shadow .25s;
            min-width: 240px;
        }

        .lead-input::placeholder {
            color: #8A90A0;
        }

        .lead-input:focus {
            border-color: var(--cyan);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, .15);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 34px;
        }

        .hero-stat {
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 14px;
            padding: 14px 18px;
            min-width: 130px;
            transition: border-color .2s;
        }

        .hero-stat:hover {
            border-color: rgba(0, 240, 255, .35);
        }

        .hero-stat .number {
            color: var(--lime);
            font-weight: 800;
            font-size: 1.35rem;
        }

        .hero-stat .label {
            font-size: .78rem;
            color: var(--muted);
        }

        /* Tip cards */
        .tip-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 22px;
        }

        .tip-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: linear-gradient(145deg, rgba(255, 255, 255, .05), rgba(11, 26, 48, .82));
            border: 1px solid rgba(0, 240, 255, .14);
            transition: transform .25s, border-color .25s, box-shadow .25s;
        }

        .tip-card:hover {
            transform: translateY(-5px);
            border-color: rgba(0, 240, 255, .45);
            box-shadow: 0 0 28px rgba(0, 240, 255, .18);
        }

        .tip-card-img {
            position: relative;
            height: 210px;
            overflow: hidden;
        }

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

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

        .tip-number {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--lime);
            color: #0F0C20;
            font-weight: 800;
            font-size: .82rem;
            padding: 6px 12px;
            border-radius: 8px;
            box-shadow: 0 0 12px rgba(204, 255, 0, .4);
        }

        .tip-card-body {
            padding: 22px;
        }

        .tip-card-title {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 10px;
            color: #fff;
        }

        .tip-card-text {
            color: var(--muted);
            font-size: .92rem;
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .tip-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .74rem;
            color: var(--cyan);
            font-weight: 700;
            padding: 5px 10px;
            border-radius: 6px;
            background: rgba(0, 240, 255, .1);
            border: 1px solid rgba(0, 240, 255, .2);
        }

        /* Scenario */
        .scenario-wrap {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
            align-items: center;
        }

        .scenario-img {
            border-radius: 22px;
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, .22);
            box-shadow: 0 24px 48px rgba(0, 0, 0, .5);
        }

        .scenario-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 280px;
        }

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

        .scenario-item {
            display: flex;
            gap: 14px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .07);
            align-items: flex-start;
        }

        .scenario-item:last-child {
            border-bottom: none;
        }

        .scenario-icon {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, .1);
            border: 1px solid rgba(0, 240, 255, .25);
            color: var(--cyan);
            font-size: 1.1rem;
        }

        .scenario-content h4 {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 5px;
            color: #fff;
        }

        .scenario-content p {
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.6;
            margin: 0;
        }

        /* Social proof */
        .proof-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .proof-card {
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius);
            padding: 24px;
            transition: border-color .25s;
        }

        .proof-card:hover {
            border-color: rgba(204, 255, 0, .3);
        }

        .proof-stars {
            color: #FFBF00;
            font-size: .92rem;
            margin-bottom: 12px;
        }

        .proof-text {
            color: #D9DCE1;
            font-size: .94rem;
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .proof-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .proof-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--cyan), var(--lime));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: #0F0C20;
            font-size: .9rem;
        }

        .proof-name {
            font-weight: 700;
            font-size: .9rem;
            color: #fff;
        }

        .proof-meta {
            font-size: .76rem;
            color: var(--muted);
        }

        /* FAQ */
        .faq-list {
            max-width: 820px;
        }

        .faq-item {
            border: 1px solid rgba(0, 240, 255, .15);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            background: rgba(255, 255, 255, .03);
            transition: border-color .2s;
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, .35);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            background: transparent;
            border: none;
            color: #fff;
            font-weight: 700;
            font-size: .95rem;
            cursor: pointer;
            text-align: left;
            transition: color .2s;
        }

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

        .faq-question i {
            flex-shrink: 0;
            transition: transform .25s;
            color: var(--cyan);
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
            color: var(--muted);
        }

        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: .92rem;
            line-height: 1.65;
        }

        /* Bottom sticky bar */
        .sticky-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 70;
            background: rgba(15, 12, 32, .92);
            backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0, 240, 255, .25);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            flex-wrap: wrap;
        }

        .sticky-bar-text {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: .92rem;
            color: #fff;
        }

        .sticky-bar-text i {
            color: var(--lime);
            font-size: 1.2rem;
            filter: drop-shadow(0 0 6px rgba(204, 255, 0, .5));
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 80;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, .6);
            backdrop-filter: blur(8px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--cyan);
            cursor: pointer;
            transition: all .3s;
            opacity: .6;
            box-shadow: 0 0 15px rgba(0, 240, 255, .5);
            animation: fab-breathe 3s ease-in-out infinite;
            text-decoration: none;
        }

        .fab::before {
            content: "";
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, #CCFF00, #00F0FF);
            z-index: -1;
            animation: fab-spin 4s linear infinite;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(0, 240, 255, .75);
        }

        .fab:active {
            transform: scale(.94);
        }

        .fab .notif-dot {
            position: absolute;
            top: 3px;
            right: 3px;
            width: 10px;
            height: 10px;
            background: #FF007F;
            border-radius: 50%;
            box-shadow: 0 0 8px rgba(255, 0, 127, .8);
            animation: dot-blink 1.4s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%,
            100% {
                opacity: .6;
            }
            50% {
                opacity: .85;
            }
        }

        @keyframes fab-spin {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }

        @keyframes dot-blink {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: .25;
            }
        }

        /* Footer */
        .footer {
            background: #08060F;
            border-top: 1px solid rgba(0, 240, 255, .12);
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }

        .footer-brand h3 {
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .footer-brand p {
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.65;
            margin-bottom: 16px;
        }

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

        .pay-badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 12px;
            border-radius: 8px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
            font-size: .78rem;
            font-weight: 700;
            color: #E8EAED;
        }

        .footer h4 {
            color: #fff;
            font-size: .92rem;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .footer-link {
            display: block;
            color: var(--muted);
            font-size: .88rem;
            padding: 5px 0;
            transition: color .2s;
        }

        .footer-link:hover {
            color: var(--cyan);
        }

        /* CTA section */
        .cta-wrap {
            background: linear-gradient(135deg, rgba(0, 240, 255, .08), rgba(204, 255, 0, .05));
            border: 1px solid rgba(0, 240, 255, .25);
            border-radius: 22px;
            padding: 40px 28px;
            text-align: center;
        }

        .cta-wrap h2 {
            font-size: clamp(1.4rem, 3vw, 2rem);
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-wrap p {
            color: var(--muted);
            max-width: 540px;
            margin: 0 auto 24px;
            font-size: .98rem;
        }

        /* Responsive */
        @media (min-width: 640px) {
            .tip-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .proof-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
                gap: 22px;
            }
            .scenario-wrap {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .tip-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .proof-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .sticky-bar {
                padding: 12px 32px;
            }
            .fab {
                width: 60px;
                height: 60px;
                font-size: 1.55rem;
                left: 20px;
                bottom: 100px;
            }
        }

        @media (min-width: 1024px) {
            .desktop-nav {
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr 1fr;
                gap: 40px;
            }
            .section {
                padding: 88px 0;
            }
            .hero {
                min-height: 82vh;
            }
        }

        @media (max-width: 767px) {
            .menu-btn {
                display: inline-flex;
            }
            .auth-btns .btn-ghost {
                display: none;
            }
            .sticky-bar-text span {
                display: none;
            }
            .sticky-bar {
                padding: 10px 14px;
            }
        }

        @media (min-width: 768px) {
            .menu-btn {
                display: none;
            }
        }

        @media (max-width: 480px) {
            .tip-card-img {
                height: 160px;
            }
            .hero-stats {
                gap: 10px;
            }
            .hero-stat {
                min-width: 100px;
                padding: 10px 12px;
            }
            .cta-wrap {
                padding: 28px 18px;
            }
            .lead-input {
                min-width: 100%;
            }
        }

/* roulang page: article */
:root {
            --bg: #0F0C20;
            --ocean: #0B1A30;
            --lime: #CCFF00;
            --cyan: #00F0FF;
            --text: #FFFFFF;
            --muted: #A6ACAF;
            --border: rgba(0, 240, 255, .18);
            --glow: rgba(0, 240, 255, .35);
            --radius: 18px;
            --shadow: 0 20px 50px rgba(0, 0, 0, .45);
            --section-gap: 72px;
            --card-bg: rgba(255, 255, 255, .04);
            --card-hover: rgba(0, 240, 255, .1);
            --heading-weight: 800;
            --body-line-height: 1.6;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Be Vietnam Pro', system-ui, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: var(--body-line-height);
            padding-bottom: 140px;
            overflow-x: hidden;
            margin: 0;
            padding-left: 0;
            padding-right: 0;
            box-sizing: border-box;
        }

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

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

        .section-head {
            max-width: 720px;
            margin-bottom: 40px;
            text-align: left;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            line-height: 1.25;
            font-weight: 800;
            margin: 0 0 12px;
        }

        .section-sub {
            color: var(--muted);
            font-size: 1rem;
            margin-top: 12px;
            line-height: 1.6;
        }

        /* Header */
        .header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(15, 12, 32, .88);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 240, 255, .12);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            white-space: nowrap;
        }

        .logo i {
            color: var(--lime);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 6px rgba(204, 255, 0, .6));
        }

        .desktop-nav {
            display: none;
            align-items: center;
            gap: 26px;
        }

        .nav-link {
            color: var(--muted);
            font-weight: 600;
            font-size: .95rem;
            transition: color .2s;
            position: relative;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--cyan);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -6px;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
        }

        .auth-btns {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 14px;
            border-radius: 10px;
            border: 1px solid var(--border);
            color: #fff;
            font-weight: 600;
            font-size: .88rem;
            transition: .2s;
            cursor: pointer;
            background: transparent;
        }

        .btn-ghost:hover {
            border-color: var(--cyan);
            color: var(--cyan);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 16px;
            border-radius: 10px;
            background: var(--lime);
            color: #0F0C20;
            font-weight: 800;
            font-size: .9rem;
            box-shadow: 0 0 18px rgba(204, 255, 0, .35);
            transition: .2s;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 26px rgba(204, 255, 0, .55);
        }

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

        .menu-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--border);
            color: #fff;
            background: rgba(255, 255, 255, .04);
            cursor: pointer;
        }

        .mobile-menu {
            display: none;
            padding: 14px 20px 18px;
            border-top: 1px solid rgba(0, 240, 255, .1);
            background: rgba(15, 12, 32, .95);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-nav-link {
            display: block;
            padding: 12px 0;
            color: var(--muted);
            font-weight: 600;
            border-bottom: 1px solid rgba(255, 255, 255, .05);
        }

        .mobile-nav-link:hover {
            color: var(--cyan);
        }

        /* Article Header */
        .article-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 12, 32, .97) 0%, rgba(11, 26, 48, .9) 50%, rgba(0, 240, 255, .1) 100%);
            border-bottom: 1px solid rgba(0, 240, 255, .1);
            padding: 48px 0 32px;
        }

        .article-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: .16;
            z-index: 0;
        }

        .article-banner .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: .82rem;
            color: var(--muted);
            margin-bottom: 18px;
        }

        .breadcrumb a {
            color: var(--cyan);
            font-weight: 600;
            transition: color .2s;
        }

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

        .breadcrumb .sep {
            opacity: .6;
            margin: 0 4px;
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }

        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-top: 16px;
            font-size: .85rem;
            color: var(--muted);
        }

        .article-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta-item i {
            color: var(--cyan);
            font-size: .82rem;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 240, 255, .1);
            border: 1px solid rgba(0, 240, 255, .28);
            color: var(--cyan);
            padding: 5px 10px;
            border-radius: 999px;
            font-size: .72rem;
            font-weight: 700;
        }

        /* Article Body Layout */
        .article-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 36px;
            padding-top: 40px;
            padding-bottom: 40px;
        }

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

        .article-cover {
            border-radius: 22px;
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, .18);
            box-shadow: var(--shadow);
            margin-bottom: 28px;
        }

        .article-cover img {
            width: 100%;
            min-height: 260px;
            object-fit: cover;
        }

        .article-content {
            color: #C9CDD3;
            font-size: 1rem;
            line-height: 1.7;
            max-width: 100%;
            word-wrap: break-word;
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: #fff;
            font-weight: 800;
            line-height: 1.3;
            margin-top: 28px;
            margin-bottom: 14px;
        }

        .article-content h2 {
            font-size: 1.5rem;
        }

        .article-content h3 {
            font-size: 1.25rem;
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 18px 20px;
            padding-left: 4px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
            position: relative;
        }

        .article-content ul li::before {
            content: "•";
            color: var(--cyan);
            font-weight: 700;
            display: inline-block;
            width: 18px;
            margin-left: -18px;
        }

        .article-content img {
            border-radius: 14px;
            margin: 20px 0;
            max-width: 100%;
            height: auto;
        }

        .article-content a {
            color: var(--cyan);
            font-weight: 600;
            border-bottom: 1px solid rgba(0, 240, 255, .4);
            transition: color .2s;
        }

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

        .article-content blockquote {
            border-left: 3px solid var(--cyan);
            padding: 14px 18px;
            margin: 20px 0;
            background: rgba(0, 240, 255, .06);
            border-radius: 0 12px 12px 0;
            color: #E2E8F0;
            font-style: italic;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: .9rem;
        }

        .article-content table th,
        .article-content table td {
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, .1);
            text-align: left;
        }

        .article-content table th {
            background: rgba(0, 240, 255, .08);
            color: #fff;
            font-weight: 700;
        }

        /* Highlight Box */
        .highlight-box {
            margin: 28px 0;
            background: linear-gradient(145deg, rgba(0, 240, 255, .07), rgba(204, 255, 0, .04));
            border: 1px solid rgba(0, 240, 255, .22);
            border-radius: 16px;
            padding: 22px 24px;
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .highlight-box i {
            color: var(--lime);
            font-size: 1.4rem;
            margin-top: 2px;
            flex-shrink: 0;
        }

        .highlight-box p {
            margin: 0;
            color: #D1F2EB;
            font-weight: 600;
            font-size: .95rem;
        }

        /* Not Found */
        .not-found {
            text-align: center;
            padding: 70px 20px;
            max-width: 520px;
            margin: 0 auto;
        }

        .not-found i {
            font-size: 3rem;
            color: var(--cyan);
            margin-bottom: 20px;
            opacity: .7;
        }

        .not-found h2 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--muted);
            margin-bottom: 24px;
        }

        /* Related Cards */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(1, 1fr);
            gap: 18px;
        }

        .related-card {
            background: var(--card-bg);
            border: 1px solid rgba(0, 240, 255, .14);
            border-radius: 16px;
            overflow: hidden;
            transition: .3s;
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 240, 255, .4);
            box-shadow: 0 16px 36px rgba(0, 0, 0, .4), 0 0 20px rgba(0, 240, 255, .12);
        }

        .related-card-img {
            height: 160px;
            overflow: hidden;
            position: relative;
        }

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

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

        .related-card-body {
            padding: 16px 18px 18px;
        }

        .related-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .related-card-body p {
            color: var(--muted);
            font-size: .85rem;
            margin-bottom: 14px;
            line-height: 1.55;
        }

        .related-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--cyan);
            font-weight: 700;
            font-size: .82rem;
            transition: color .2s;
        }

        .related-card:hover .related-card-link {
            color: var(--lime);
        }

        /* Feature Strip */
        .feature-strip {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
            margin-top: 32px;
        }

        .feature-strip-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            background: rgba(255, 255, 255, .03);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 12px;
            padding: 14px;
        }

        .feature-strip-item i {
            color: var(--cyan);
            font-size: 1.1rem;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .feature-strip-item span {
            font-size: .82rem;
            color: #D1F2EB;
            font-weight: 600;
            line-height: 1.4;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 24px;
        }

        .faq-item {
            border: 1px solid rgba(0, 240, 255, .14);
            border-radius: 14px;
            overflow: hidden;
            transition: border-color .25s;
            background: rgba(255, 255, 255, .02);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, .35);
        }

        .faq-toggle {
            display: none;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 700;
            font-size: .95rem;
            color: #fff;
            transition: color .2s;
            text-align: left;
            width: 100%;
            background: transparent;
            border: none;
        }

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

        .faq-question i {
            color: var(--cyan);
            font-size: .85rem;
            transition: transform .3s;
            flex-shrink: 0;
        }

        .faq-toggle:checked~.faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
            padding: 0 20px;
            color: var(--muted);
            font-size: .88rem;
            line-height: 1.6;
        }

        .faq-toggle:checked~.faq-answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }

        /* CTA Panel */
        .cta-panel {
            background: linear-gradient(145deg, rgba(11, 26, 48, .9), rgba(15, 12, 32, .95));
            border: 1px solid rgba(0, 240, 255, .2);
            border-radius: 22px;
            padding: 36px 28px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, .4);
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, .18), transparent 70%);
            z-index: 0;
        }

        .cta-panel-text {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 240px;
        }

        .cta-panel-text h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }

        .cta-panel-text p {
            color: var(--muted);
            font-size: .92rem;
        }

        .cta-panel .btn-cyan {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
        }

        /* Bottom CTA Bar */
        .bottom-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 55;
            background: rgba(15, 12, 32, .92);
            backdrop-filter: blur(14px);
            border-top: 1px solid rgba(0, 240, 255, .15);
            padding: 10px 16px;
        }

        .bottom-cta-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            flex-wrap: wrap;
        }

        .bottom-cta-text {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .bottom-cta-title {
            font-weight: 800;
            font-size: .92rem;
            color: #fff;
        }

        .bottom-cta-sub {
            font-size: .75rem;
            color: var(--muted);
        }

        .btn-cta-bottom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 20px;
            border-radius: 10px;
            background: var(--lime);
            color: #0F0C20;
            font-weight: 800;
            font-size: .88rem;
            box-shadow: 0 0 18px rgba(204, 255, 0, .4);
            transition: .2s;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-cta-bottom:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(204, 255, 0, .6);
        }

        /* FAB - Cyber & Neon Style */
        .fab-neon {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: rgba(0, 0, 0, .6);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            cursor: pointer;
            opacity: .6;
            transition: opacity .3s, box-shadow .3s, transform .2s;
            box-shadow: 0 0 15px rgba(0, 240, 255, .25), 0 4px 20px rgba(0, 0, 0, .5);
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
        }

        .fab-neon::before {
            content: "";
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--lime), var(--cyan));
            z-index: -1;
            opacity: .7;
        }

        .fab-neon i {
            font-size: 1.5rem;
            color: var(--cyan);
            text-shadow: 0 0 10px rgba(0, 240, 255, .8);
            transition: color .3s, text-shadow .3s;
        }

        .fab-neon:hover {
            opacity: 1;
            transform: scale(1.06);
            box-shadow: 0 0 30px rgba(0, 240, 255, .5), 0 0 50px rgba(0, 240, 255, .2);
        }

        .fab-neon:hover i {
            color: var(--lime);
            text-shadow: 0 0 18px rgba(204, 255, 0, .9);
        }

        .fab-neon:active {
            transform: scale(.95);
            border-color: var(--lime);
        }

        .fab-neon .notif-dot {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #FF007F;
            border: 2px solid rgba(0, 0, 0, .7);
            animation: neon-blink 1.4s infinite;
        }

        @keyframes neon-blink {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 8px #FF007F;
            }
            50% {
                opacity: .4;
                box-shadow: 0 0 2px #FF007F;
            }
        }

        /* Button Cyan */
        .btn-cyan {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: 12px;
            background: var(--cyan);
            color: #0B1A30;
            font-weight: 800;
            font-size: .95rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, .4);
            transition: .2s;
            border: none;
            cursor: pointer;
        }

        .btn-cyan:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, .7);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: 12px;
            border: 1px solid rgba(0, 240, 255, .35);
            color: #fff;
            font-weight: 700;
            font-size: .95rem;
            transition: .2s;
            background: rgba(255, 255, 255, .03);
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, .1);
            border-color: var(--cyan);
        }

        /* Footer */
        .footer {
            background: #0B0B12;
            border-top: 1px solid rgba(0, 240, 255, .1);
            padding: 48px 0 28px;
            position: relative;
            z-index: 2;
            margin-top: 20px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
        }

        .footer-brand h3 {
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .footer-brand p {
            color: var(--muted);
            font-size: .88rem;
            line-height: 1.6;
            margin-bottom: 16px;
        }

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

        .pay-badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 12px;
            border-radius: 8px;
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .1);
            font-size: .75rem;
            font-weight: 700;
            color: #D1F2EB;
        }

        .footer h4 {
            font-size: .9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-link {
            display: block;
            color: var(--muted);
            font-size: .85rem;
            padding: 7px 0;
            transition: color .2s;
        }

        .footer-link:hover {
            color: var(--cyan);
        }

        /* Responsive */
        @media (min-width: 640px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
            }

            .menu-btn {
                display: none;
            }

            .mobile-menu {
                display: none !important;
            }

            .article-layout {
                grid-template-columns: minmax(0, 1fr);
                gap: 36px;
            }

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

            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr 1fr;
            }
        }

        @media (min-width: 1024px) {
            .article-banner {
                padding: 64px 0 40px;
            }

            .article-cover img {
                min-height: 340px;
            }

            .feature-strip {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        @media (max-width: 520px) {
            .nav-container {
                padding: 12px 14px;
                gap: 10px;
            }

            .logo {
                font-size: .95rem;
            }

            .auth-btns .btn-ghost,
            .auth-btns .btn-primary {
                padding: 8px 10px;
                font-size: .78rem;
            }

            .section {
                padding: 48px 0;
            }

            .article-banner {
                padding: 32px 0 24px;
            }

            .article-meta-row {
                gap: 10px;
                font-size: .78rem;
            }

            .cta-panel {
                flex-direction: column;
                align-items: flex-start;
                padding: 26px 20px;
            }

            .bottom-cta-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .btn-cta-bottom {
                width: 100%;
                justify-content: center;
            }

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

/* roulang page: category2 */
:root {
  --bg: #0F0C20;
  --ocean: #0B1A30;
  --lime: #CCFF00;
  --cyan: #00F0FF;
  --text: #FFFFFF;
  --muted: #A6ACAF;
  --border: rgba(0, 240, 255, .18);
  --glow: rgba(0, 240, 255, .35);
  --radius: 18px;
  --shadow: 0 20px 50px rgba(0, 0, 0, .45);
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Be Vietnam Pro', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-bottom: 110px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 40px; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.4rem); line-height: 1.25; font-weight: 800; }
.section-sub { color: var(--muted); font-size: 1rem; margin-top: 12px; }
.highlight { color: var(--cyan); }
.header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(15, 12, 32, .85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 240, 255, .12);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 20px; max-width: 1200px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.1rem; color: #fff; }
.logo i { color: var(--lime); font-size: 1.5rem; filter: drop-shadow(0 0 6px rgba(204, 255, 0, .6)); }
.desktop-nav { display: none; align-items: center; gap: 26px; }
.nav-link { color: var(--muted); font-weight: 600; font-size: .95rem; transition: color .2s; position: relative; }
.nav-link:hover, .nav-link.active { color: var(--cyan); }
.nav-link.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.auth-btns { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.btn-ghost {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 9px 14px; border-radius: 10px; border: 1px solid var(--border);
  color: #fff; font-weight: 600; font-size: .88rem; transition: .2s;
  white-space: nowrap;
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 16px; border-radius: 10px; background: var(--lime); color: #0F0C20;
  font-weight: 800; font-size: .9rem; box-shadow: 0 0 18px rgba(204, 255, 0, .35);
  transition: .2s; border: none; cursor: pointer; white-space: nowrap;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 26px rgba(204, 255, 0, .55); }
.btn-primary:active { transform: translateY(0); }
.menu-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border); color: #fff; background: rgba(255,255,255,.04); cursor: pointer; }
.mobile-menu { display: none; padding: 14px 20px 18px; border-top: 1px solid rgba(0,240,255,.1); background: rgba(15,12,32,.95); }
.mobile-menu.open { display: block; }
.mobile-nav-link { display: block; padding: 12px 0; color: var(--muted); font-weight: 600; border-bottom: 1px solid rgba(255,255,255,.05); }
.mobile-nav-link:hover { color: var(--cyan); }
.hero { position: relative; min-height: 86vh; display: flex; align-items: center; background: #0F0C20; overflow: hidden; }
.hero-video-bg {
  position: absolute; inset: 0; z-index: 0;
}
.hero-video-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(135deg, rgba(15,12,32,.92) 0%, rgba(11,26,48,.82) 50%, rgba(0,240,255,.18) 100%);
}
.hero > .container { position: relative; z-index: 2; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(0,240,255,.08);
  border: 1px solid rgba(0,240,255,.25); color: var(--cyan);
  padding: 7px 12px; border-radius: 999px; font-size: .78rem; font-weight: 700; letter-spacing: .05em;
}
.hero-title { font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.18; font-weight: 800; margin: 20px 0; text-shadow: 0 0 30px rgba(0,240,255,.25); }
.hero-desc { color: #C9CDD3; font-size: 1.05rem; max-width: 620px; margin: 0 auto 28px; }
.hero-play-wrap { display: flex; align-items: center; justify-content: center; gap: 14px; margin-bottom: 24px; }
.play-btn {
  width: 64px; height: 64px; border-radius: 50%; border: 2px solid var(--cyan);
  background: rgba(0,240,255,.12); color: var(--cyan); font-size: 1.4rem;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: .25s; animation: pulseGlow 2s ease-in-out infinite;
}
.play-btn:hover { background: rgba(0,240,255,.28); transform: scale(1.06); }
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 18px rgba(0,240,255,.3); }
  50% { box-shadow: 0 0 36px rgba(0,240,255,.6); }
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: center; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 30px; justify-content: center; }
.hero-stat { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: 14px; padding: 12px 16px; min-width: 120px; }
.hero-stat .number { color: var(--lime); font-weight: 800; font-size: 1.3rem; }
.hero-stat .label { font-size: .78rem; color: var(--muted); }
.btn-cyan {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px;
  background: var(--cyan); color: #0B1A30; font-weight: 800; font-size: .95rem;
  box-shadow: 0 0 20px rgba(0,240,255,.4); transition: .2s; border: none; cursor: pointer;
}
.btn-cyan:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(0,240,255,.7); }
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px;
  border: 1px solid rgba(0,240,255,.35); color: #fff; font-weight: 700; font-size: .95rem;
  transition: .2s; background: rgba(255,255,255,.03);
}
.btn-outline:hover { background: rgba(0,240,255,.1); border-color: var(--cyan); }
.stats-bar { background: linear-gradient(135deg, rgba(11,26,48,.95), rgba(15,12,32,.95)); border-bottom: 1px solid rgba(0,240,255,.1); }
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; padding: 28px 0; }
.stat-item { text-align: left; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--lime); }
.stat-label { color: var(--muted); font-size: .88rem; }
.tips-grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.tip-card {
  background: linear-gradient(145deg, rgba(255,255,255,.04), rgba(11,26,48,.7));
  border: 1px solid rgba(0,240,255,.14); border-radius: var(--radius);
  padding: 22px; transition: .25s; position: relative; overflow: hidden;
}
.tip-card:hover { border-color: rgba(0,240,255,.4); transform: translateY(-3px); }
.tip-card .tip-icon {
  width: 46px; height: 46px; border-radius: 12px; background: rgba(0,240,255,.08);
  border: 1px solid rgba(0,240,255,.2); color: var(--cyan); font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.tip-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.tip-card p { color: var(--muted); font-size: .92rem; }
.tip-number {
  position: absolute; top: 18px; right: 20px; font-size: 2.5rem; font-weight: 800;
  color: rgba(0,240,255,.08); line-height: 1; pointer-events: none;
}
.process-split { display: grid; grid-template-columns: 1fr; gap: 30px; margin-top: 40px; }
.process-steps { display: flex; flex-direction: column; gap: 18px; }
.process-step {
  display: flex; gap: 16px; align-items: flex-start; padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.step-dot {
  width: 36px; height: 36px; border-radius: 50%; border: 2px solid var(--cyan);
  color: var(--cyan); font-weight: 800; display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; background: rgba(0,240,255,.05);
}
.step-content h4 { font-weight: 700; margin-bottom: 4px; }
.step-content p { color: var(--muted); font-size: .9rem; }
.step-media img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius); border: 1px solid rgba(0,240,255,.2); min-height: 280px; }
.testimonial-grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.testimonial-card {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius); padding: 22px;
}
.testimonial-stars { color: #FFD700; font-size: .9rem; margin-bottom: 10px; letter-spacing: 2px; }
.testimonial-card blockquote { color: #DCDFE3; font-style: italic; font-size: .95rem; margin-bottom: 14px; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.author-avatar {
  width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--cyan), var(--lime));
  color: #0F0C20; font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: .9rem;
}
.author-name { font-weight: 700; font-size: .9rem; }
.author-location { color: var(--muted); font-size: .8rem; }
.faq-list { max-width: 780px; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: rgba(255,255,255,.04); border: 1px solid rgba(0,240,255,.12);
  border-radius: 12px; overflow: hidden;
}
.faq-item summary {
  padding: 16px 18px; cursor: pointer; font-weight: 600; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--cyan); font-size: 1.3rem; transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-answer { padding: 0 18px 16px; color: var(--muted); font-size: .92rem; }
.final-cta {
  background: linear-gradient(135deg, rgba(0,240,255,.08), rgba(204,255,0,.05));
  border: 1px solid rgba(0,240,255,.2); border-radius: 24px; padding: 40px 24px;
  text-align: center; position: relative; overflow: hidden;
}
.final-cta::before {
  content: ""; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-3.jpg');
  background-size: cover; background-position: center; opacity: .08; pointer-events: none;
}
.final-cta > * { position: relative; z-index: 2; }
.footer {
  background: #0B0A14; border-top: 1px solid rgba(0,240,255,.1); padding: 48px 0 28px; margin-top: 40px;
}
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 28px; }
.footer-brand h3 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 10px; line-height: 1.4; }
.footer-brand p { color: var(--muted); font-size: .88rem; }
.pay-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.pay-badge {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  color: var(--muted); font-size: .72rem; padding: 4px 10px; border-radius: 999px;
}
.footer h4 { font-size: .85rem; font-weight: 700; color: #CBD5E1; margin-bottom: 12px; }
.footer-link { display: block; color: var(--muted); font-size: .85rem; padding: 5px 0; transition: color .2s; }
.footer-link:hover { color: var(--cyan); }
.bottom-conversion-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 55;
  background: rgba(15, 12, 32, .94); backdrop-filter: blur(20px);
  border-top: 1px solid rgba(0,240,255,.2); padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.bottom-conversion-bar p { font-size: .85rem; color: #C9CDD3; margin: 0; }
.bottom-conversion-bar strong { color: var(--lime); display: block; font-size: .95rem; }
.fab-neon {
  position: fixed; left: 16px; bottom: 135px; z-index: 50;
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(0,0,0,.6); backdrop-filter: blur(10px);
  border: 2px solid transparent; background-clip: padding-box;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  box-shadow: 0 0 15px rgba(0,240,255,.5);
  transition: .25s; opacity: .6;
}
.fab-neon i { color: #fff; font-size: 1.3rem; }
.fab-neon::before {
  content: ""; position: absolute; inset: -2px; border-radius: 50%; z-index: -1;
  background: linear-gradient(135deg, #CCFF00, #00F0FF);
}
.fab-neon:hover { opacity: 1; box-shadow: 0 0 28px rgba(0,240,255,.8); transform: scale(1.08); }
.fab-neon:active { transform: scale(.95); }
.fab-dot {
  position: absolute; top: 0; right: 0; width: 12px; height: 12px; border-radius: 50%;
  background: #FF007F; border: 2px solid #0F0C20; box-shadow: 0 0 8px rgba(255,0,127,.7);
}
@media (min-width: 640px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .tips-grid { grid-template-columns: repeat(3, 1fr); }
  .testimonial-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
@media (min-width: 768px) {
  .desktop-nav { display: flex; }
  .menu-btn { display: none; }
  .process-split { grid-template-columns: 1.2fr 1fr; align-items: center; }
}
@media (max-width: 520px) {
  .nav-container { flex-wrap: wrap; }
  .logo span { font-size: .92rem; }
  .hero { min-height: 78vh; }
  .btn-cyan, .btn-outline { padding: 11px 16px; font-size: .85rem; }
  .bottom-conversion-bar { padding: 10px 14px; gap: 8px; }
  .bottom-conversion-bar p { font-size: .72rem; }
  .bottom-conversion-bar strong { font-size: .8rem; }
  .fab-neon { bottom: 120px; width: 48px; height: 48px; }
  .final-cta { padding: 28px 14px; }
}

/* roulang page: category3 */
/* ========== DESIGN SYSTEM (shared with homepage) ========== */
        :root {
            --bg: #0F0C20;
            --ocean: #0B1A30;
            --lime: #CCFF00;
            --cyan: #00F0FF;
            --text: #FFFFFF;
            --muted: #A6ACAF;
            --border: rgba(0, 240, 255, .18);
            --glow: rgba(0, 240, 255, .35);
            --radius: 18px;
            --shadow: 0 20px 50px rgba(0, 0, 0, .45);
        }

        html { scroll-behavior: smooth; }
        body {
            font-family: 'Be Vietnam Pro', system-ui, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            padding-bottom: 90px;
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; }
        img { max-width: 100%; display: block; }
        button, input, textarea, select { font: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .section { padding: 72px 0; position: relative; }
        .section-head { max-width: 720px; margin-bottom: 40px; }
        .section-title { font-size: clamp(1.6rem, 3vw, 2.4rem); line-height: 1.25; font-weight: 800; }
        .section-sub { color: var(--muted); font-size: 1rem; margin-top: 12px; }

        /* Header & Nav */
        .header {
            position: sticky; top: 0; z-index: 60;
            background: rgba(15, 12, 32, .85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 240, 255, .12);
        }
        .nav-container { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 20px; max-width: 1200px; margin: 0 auto; }
        .logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.1rem; color: #fff; }
        .logo i { color: var(--lime); font-size: 1.5rem; filter: drop-shadow(0 0 6px rgba(204, 255, 0, .6)); }
        .desktop-nav { display: none; align-items: center; gap: 26px; }
        .nav-link { color: var(--muted); font-weight: 600; font-size: .95rem; transition: color .2s; position: relative; }
        .nav-link:hover, .nav-link.active { color: var(--cyan); }
        .nav-link.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
        .auth-btns { display: flex; align-items: center; gap: 8px; margin-left: auto; }
        .btn-ghost {
            display: inline-flex; align-items: center; justify-content: center;
            padding: 9px 14px; border-radius: 10px; border: 1px solid var(--border);
            color: #fff; font-weight: 600; font-size: .88rem; transition: .2s; background: transparent;
        }
        .btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
        .btn-primary {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 10px 16px; border-radius: 10px; background: var(--lime); color: #0F0C20;
            font-weight: 800; font-size: .9rem; box-shadow: 0 0 18px rgba(204, 255, 0, .35);
            transition: .2s; border: none; cursor: pointer;
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 26px rgba(204, 255, 0, .55); }
        .btn-primary:active { transform: translateY(0); }
        .menu-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border); color: #fff; background: rgba(255,255,255,.04); cursor: pointer; }
        .mobile-menu { display: none; padding: 14px 20px 18px; border-top: 1px solid rgba(0,240,255,.1); background: rgba(15,12,32,.95); }
        .mobile-menu.open { display: block; }
        .mobile-nav-link { display: block; padding: 12px 0; color: var(--muted); font-weight: 600; border-bottom: 1px solid rgba(255,255,255,.05); }
        .mobile-nav-link:hover { color: var(--cyan); }

        /* Buttons */
        .btn-cyan {
            display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px;
            background: var(--cyan); color: #0B1A30; font-weight: 800; font-size: .95rem;
            box-shadow: 0 0 20px rgba(0,240,255,.4); transition: .2s; border: none; cursor: pointer;
        }
        .btn-cyan:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(0,240,255,.7); }
        .btn-outline {
            display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px;
            border: 1px solid rgba(0,240,255,.35); color: #fff; font-weight: 700; font-size: .95rem;
            transition: .2s; background: rgba(255,255,255,.03); cursor: pointer;
        }
        .btn-outline:hover { background: rgba(0,240,255,.1); border-color: var(--cyan); }

        /* Hero Section */
        .hero {
            position: relative; min-height: 88vh; display: flex; align-items: center;
            background: #0F0C20; overflow: hidden;
        }
        .hero-bg {
            position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-3.jpg');
            background-size: cover; background-position: center; opacity: .25; z-index: 0;
        }
        .hero-overlay {
            position: absolute; inset: 0; z-index: 1;
            background: linear-gradient(135deg, rgba(15,12,32,.95) 0%, rgba(11,26,48,.82) 52%, rgba(0,240,255,.12) 100%);
        }
        .hero > .container { position: relative; z-index: 2; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(0,240,255,.08); border: 1px solid rgba(0,240,255,.25);
            color: var(--cyan); padding: 7px 12px; border-radius: 999px;
            font-size: .78rem; font-weight: 700; letter-spacing: .05em;
        }
        .hero-title {
            font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.18; font-weight: 800;
            margin: 20px 0; text-shadow: 0 0 30px rgba(0,240,255,.25);
        }
        .hero-desc { color: #C9CDD3; font-size: 1.05rem; max-width: 620px; margin: 0 0 28px; }
        .hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
        .hero-stats { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 30px; }
        .hero-stat {
            background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
            border-radius: 14px; padding: 12px 16px; min-width: 120px;
        }
        .hero-stat .number { color: var(--lime); font-weight: 800; font-size: 1.3rem; }
        .hero-stat .label { font-size: .78rem; color: var(--muted); }

        /* Cards */
        .glass-card {
            background: linear-gradient(145deg, rgba(255,255,255,.05), rgba(11,26,48,.8));
            border: 1px solid rgba(0,240,255,.14); border-radius: var(--radius);
            padding: 24px; transition: .25s;
        }
        .glass-card:hover {
            border-color: rgba(0,240,255,.35); box-shadow: 0 0 30px rgba(0,240,255,.12);
            transform: translateY(-4px);
        }
        .icon-box {
            width: 48px; height: 48px; border-radius: 12px;
            background: rgba(0,240,255,.1); border: 1px solid rgba(0,240,255,.2);
            display: flex; align-items: center; justify-content: center;
            color: var(--cyan); font-size: 1.3rem; margin-bottom: 14px;
        }

        /* Step list */
        .step-list { list-style: none; padding: 0; margin: 0; }
        .step-item {
            display: flex; gap: 16px; align-items: flex-start;
            padding: 18px 0; border-bottom: 1px solid rgba(0,240,255,.1);
            transition: .2s;
        }
        .step-item:last-child { border-bottom: none; }
        .step-num {
            flex-shrink: 0; width: 40px; height: 40px; border-radius: 50%;
            background: linear-gradient(135deg, var(--cyan), var(--lime));
            color: #0B1A30; font-weight: 800; display: flex; align-items: center;
            justify-content: center; font-size: 1.1rem; box-shadow: 0 0 18px rgba(0,240,255,.3);
        }
        .step-content h3 { font-weight: 700; font-size: 1.05rem; margin-bottom: 4px; }
        .step-content p { color: var(--muted); font-size: .92rem; }

        /* Feature list */
        .feature-row {
            display: flex; gap: 14px; align-items: flex-start; padding: 14px 0;
        }
        .feature-icon { color: var(--lime); font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
        .feature-text h4 { font-weight: 700; font-size: .98rem; margin-bottom: 2px; }
        .feature-text p { color: var(--muted); font-size: .9rem; }

        /* FAQ */
        .faq-item {
            border: 1px solid rgba(0,240,255,.12); border-radius: 14px;
            margin-bottom: 12px; overflow: hidden; background: rgba(255,255,255,.03);
            transition: .2s;
        }
        .faq-item:hover { border-color: rgba(0,240,255,.3); }
        .faq-question {
            width: 100%; display: flex; align-items: center; justify-content: space-between;
            padding: 16px 20px; font-weight: 700; font-size: .95rem;
            color: #fff; background: transparent; border: none; cursor: pointer; text-align: left;
        }
        .faq-question i { transition: .3s; color: var(--cyan); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height .35s ease, padding .35s ease;
            padding: 0 20px; color: var(--muted); font-size: .9rem; line-height: 1.65;
        }
        .faq-item.active .faq-answer { max-height: 300px; padding: 0 20px 18px; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }

        /* Pay badges */
        .pay-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
        .pay-badge {
            background: rgba(0,240,255,.08); border: 1px solid rgba(0,240,255,.2);
            color: var(--cyan); font-size: .75rem; font-weight: 600;
            padding: 5px 10px; border-radius: 8px; letter-spacing: .03em;
        }

        /* Footer */
        .footer {
            background: #0D0A1E; border-top: 1px solid rgba(0,240,255,.1);
            padding-top: 48px; margin-top: 40px;
        }
        .footer-grid { display: grid; grid-template-columns: 1fr; gap: 28px; padding-bottom: 32px; }
        .footer-brand h3 { font-weight: 800; font-size: 1.05rem; margin-bottom: 10px; color: #fff; }
        .footer-brand p { color: var(--muted); font-size: .88rem; max-width: 380px; }
        .footer h4 { font-weight: 700; font-size: .95rem; color: #fff; margin-bottom: 12px; }
        .footer-link { display: block; color: var(--muted); font-size: .88rem; padding: 4px 0; transition: .2s; }
        .footer-link:hover { color: var(--cyan); }

        /* Bottom sticky bar */
        .sticky-cta {
            position: fixed; bottom: 0; left: 0; right: 0; z-index: 50;
            background: rgba(15, 12, 32, .92); backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0,240,255,.2); padding: 10px 16px;
            display: flex; align-items: center; justify-content: center; gap: 12px;
        }
        .sticky-cta .btn-primary { flex-shrink: 0; }

        /* FAB - Cyber & Neon Style */
        .fab {
            position: fixed; left: 16px; bottom: 96px; z-index: 55;
            width: 56px; height: 56px; border-radius: 28px;
            background: rgba(0, 0, 0, .6); backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0,0,0,.6), rgba(0,0,0,.6)), linear-gradient(135deg, #CCFF00, #00F0FF);
            background-clip: padding-box, border-box;
            display: flex; align-items: center; justify-content: center;
            color: var(--cyan); font-size: 1.3rem; cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, .5);
            opacity: .6; transition: .3s;
        }
        .fab:hover { opacity: 1; box-shadow: 0 0 28px rgba(0, 240, 255, .75); transform: scale(1.1); }
        .fab:active { transform: scale(.95); border-color: #FF007F; }
        .fab .notify-dot {
            position: absolute; top: -2px; right: -2px; width: 14px; height: 14px;
            border-radius: 50%; background: #FF007F; border: 2px solid #0F0C20;
            animation: neon-blink 1.2s infinite;
        }
        @keyframes neon-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: .25; }
        }

        /* Responsive */
        @media (min-width: 768px) {
            .desktop-nav { display: flex; }
            .menu-btn { display: none; }
            .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
            .sell-grid { grid-template-columns: repeat(3, 1fr); }
        }
        @media (max-width: 520px) {
            .auth-btns .btn-ghost { display: none; }
            .auth-btns .btn-primary { padding: 8px 12px; font-size: .8rem; }
            .sticky-cta { flex-wrap: wrap; }
            .sticky-cta .btn-primary { width: 100%; }
            .sticky-cta span { display: none; }
        }