/* roulang page: index */
:root {
            --bg: #08090f;
            --bg-soft: #0b1020;
            --panel: rgba(13, 17, 30, 0.82);
            --panel-solid: #0d111e;
            --panel-light: #111a2c;
            --blue: #0052ff;
            --blue-light: #3c7cff;
            --cyan: #00f0ff;
            --cyan-soft: #8cefff;
            --text: #f7fbff;
            --muted: #9aa8be;
            --muted-strong: #cbd5e1;
            --line: rgba(133, 164, 216, 0.18);
            --line-cyan: rgba(0, 240, 255, 0.32);
            --success: #76f6b5;
            --danger: #ff557c;
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 28px;
            --shadow: 0 20px 60px rgba(0, 0, 0, .35);
            --glow: 0 0 28px rgba(0, 240, 255, .18);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            min-width: 320px;
            color: var(--text);
            background:
                radial-gradient(circle at 8% 5%, rgba(0, 82, 255, .14), transparent 28rem),
                radial-gradient(circle at 90% 30%, rgba(0, 240, 255, .08), transparent 24rem),
                var(--bg);
            font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
            font-size: 16px;
            line-height: 1.62;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, background-color .25s ease, border-color .25s ease, transform .25s ease, box-shadow .25s ease;
        }

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

        button,
        input {
            font: inherit;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(0, 240, 255, .72);
            outline-offset: 4px;
        }

        .container {
            width: min(1180px, calc(100% - 40px));
            margin: 0 auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, .84);
            border-bottom: 1px solid rgba(0, 240, 255, .12);
            box-shadow: 0 10px 35px rgba(0, 0, 0, .22);
            backdrop-filter: blur(18px);
        }

        .navbar {
            min-height: 78px;
            padding: 12px 0;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            color: var(--text);
            font-size: 1.05rem;
            font-weight: 800;
            letter-spacing: -.02em;
            line-height: 1.12;
            max-width: 260px;
        }

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

        .brand-mark {
            display: inline-grid;
            place-items: center;
            width: 40px;
            height: 40px;
            flex: 0 0 40px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 13px;
            background: linear-gradient(145deg, rgba(0, 82, 255, .28), rgba(0, 240, 255, .08));
            box-shadow: inset 0 0 18px rgba(0, 240, 255, .12), 0 0 18px rgba(0, 82, 255, .16);
            font-size: 1.25rem;
        }

        .navbar-toggler {
            border: 1px solid var(--line-cyan);
            border-radius: 10px;
            padding: 8px 10px;
            color: var(--cyan);
            background: rgba(0, 240, 255, .06);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 .2rem rgba(0, 240, 255, .2);
        }

        .navbar-toggler-icon {
            filter: invert(82%) sepia(99%) saturate(1800%) hue-rotate(150deg) brightness(105%);
        }

        .nav-list {
            gap: 5px;
            margin-left: 32px;
        }

        .nav-link {
            position: relative;
            padding: 10px 14px !important;
            color: var(--muted-strong) !important;
            font-size: .93rem;
            font-weight: 600;
        }

        .nav-link::after {
            position: absolute;
            right: 14px;
            bottom: 3px;
            left: 14px;
            height: 2px;
            content: "";
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan);
            transform: scaleX(0);
            transition: transform .25s ease;
        }

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

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 13px;
            margin-left: auto;
        }

        .login-link {
            color: var(--muted-strong);
            font-size: .92rem;
            font-weight: 700;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 11px 20px;
            border: 1px solid transparent;
            border-radius: 12px;
            font-size: .92rem;
            font-weight: 800;
            line-height: 1;
            transition: transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease;
        }

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

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

        .btn-primary {
            color: #fff;
            border-color: rgba(126, 220, 255, .55);
            background: linear-gradient(110deg, var(--blue), #087bff 55%, var(--cyan));
            box-shadow: 0 0 23px rgba(0, 82, 255, .35);
        }

        .btn-primary:hover {
            color: #fff;
            box-shadow: 0 0 32px rgba(0, 240, 255, .45);
        }

        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-cyan);
            background: rgba(0, 240, 255, .045);
        }

        .btn-outline:hover {
            color: #fff;
            border-color: var(--cyan);
            background: rgba(0, 240, 255, .12);
            box-shadow: 0 0 24px rgba(0, 240, 255, .18);
        }

        .btn-dark {
            color: var(--muted-strong);
            border-color: var(--line);
            background: rgba(255, 255, 255, .04);
        }

        .btn-dark:hover {
            color: var(--text);
            border-color: var(--line-cyan);
        }

        .hero {
            position: relative;
            padding: 76px 0 42px;
            background:
                linear-gradient(90deg, rgba(8, 9, 15, .94) 0%, rgba(8, 9, 15, .78) 45%, rgba(8, 9, 15, .86) 100%),
                url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            border-bottom: 1px solid rgba(0, 240, 255, .1);
        }

        .hero::before {
            position: absolute;
            inset: 0;
            pointer-events: none;
            content: "";
            opacity: .18;
            background-image:
                linear-gradient(rgba(0, 240, 255, .12) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, .12) 1px, transparent 1px);
            background-size: 48px 48px;
            mask-image: linear-gradient(to bottom, black, transparent);
        }

        .hero-grid {
            position: relative;
            display: grid;
            grid-template-columns: minmax(0, 1.35fr) minmax(300px, .75fr);
            grid-template-rows: auto auto;
            gap: 18px;
        }

        .hero-main,
        .hero-mini,
        .hero-strip {
            border: 1px solid var(--line-cyan);
            background: rgba(9, 15, 29, .7);
            box-shadow: var(--shadow), inset 0 0 40px rgba(0, 82, 255, .06);
            backdrop-filter: blur(12px);
        }

        .hero-main {
            grid-row: span 2;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 495px;
            padding: clamp(30px, 5vw, 68px);
            border-radius: var(--radius-lg);
            clip-path: polygon(0 0, 97% 0, 100% 7%, 100% 93%, 97% 100%, 0 100%);
        }

        .eyebrow,
        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            width: fit-content;
            color: var(--cyan);
            font-size: .73rem;
            font-weight: 900;
            letter-spacing: .14em;
            text-transform: uppercase;
        }

        .eyebrow::before,
        .section-kicker::before {
            width: 23px;
            height: 2px;
            content: "";
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
        }

        h1,
        h2,
        h3,
        p {
            margin-top: 0;
        }

        h1 {
            max-width: 800px;
            margin: 22px 0 19px;
            color: #fff;
            font-size: clamp(2.45rem, 5vw, 5rem);
            font-weight: 850;
            letter-spacing: -.065em;
            line-height: 1.02;
        }

        .hero-lead {
            max-width: 660px;
            margin-bottom: 28px;
            color: var(--muted-strong);
            font-size: clamp(1rem, 1.5vw, 1.16rem);
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 31px;
        }

        .hero-data {
            display: flex;
            flex-wrap: wrap;
            gap: 25px;
            padding-top: 21px;
            border-top: 1px solid var(--line);
        }

        .data-point strong {
            display: block;
            color: var(--cyan);
            font-size: 1.25rem;
            line-height: 1.2;
        }

        .data-point span {
            display: block;
            margin-top: 4px;
            color: var(--muted);
            font-size: .78rem;
        }

        .hero-mini {
            position: relative;
            min-height: 178px;
            padding: 23px;
            overflow: hidden;
            border-radius: var(--radius-md);
        }

        .hero-mini::after {
            position: absolute;
            right: -35px;
            bottom: -50px;
            width: 150px;
            height: 150px;
            content: "";
            border: 1px solid rgba(0, 240, 255, .24);
            border-radius: 50%;
            box-shadow: 0 0 0 18px rgba(0, 240, 255, .035), 0 0 0 37px rgba(0, 240, 255, .025);
        }

        .mini-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
        }

        .mini-label {
            color: var(--muted);
            font-size: .76rem;
            font-weight: 800;
            letter-spacing: .08em;
            text-transform: uppercase;
        }

        .mode-pill,
        .status-pill,
        .tag {
            display: inline-flex;
            align-items: center;
            width: fit-content;
            border-radius: 999px;
            font-size: .7rem;
            font-weight: 800;
        }

        .mode-pill {
            padding: 5px 9px;
            color: var(--success);
            border: 1px solid rgba(118, 246, 181, .28);
            background: rgba(118, 246, 181, .08);
        }

        .mini-card-title {
            margin-bottom: 8px;
            color: #fff;
            font-size: 1.32rem;
            font-weight: 800;
            letter-spacing: -.025em;
        }

        .mini-copy {
            max-width: 230px;
            margin-bottom: 0;
            color: var(--muted);
            font-size: .87rem;
            line-height: 1.55;
        }

        .hero-strip {
            grid-column: 1 / -1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 17px 22px;
            border-radius: 16px;
            background: linear-gradient(90deg, rgba(0, 82, 255, .18), rgba(0, 240, 255, .07));
        }

        .strip-copy {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--muted-strong);
            font-size: .92rem;
        }

        .strip-icon {
            display: grid;
            place-items: center;
            width: 35px;
            height: 35px;
            flex: 0 0 35px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 10px;
            background: rgba(0, 240, 255, .08);
        }

        .section {
            padding: 100px 0;
        }

        .section-sm {
            padding: 78px 0;
        }

        .section-heading {
            max-width: 720px;
            margin-bottom: 38px;
        }

        .section-heading h2 {
            margin: 13px 0 12px;
            color: #fff;
            font-size: clamp(1.9rem, 3.4vw, 3.15rem);
            font-weight: 800;
            letter-spacing: -.045em;
            line-height: 1.1;
        }

        .section-heading p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: 1rem;
            line-height: 1.7;
        }

        .section-heading.split {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 30px;
            max-width: none;
        }

        .section-heading.split > div:first-child {
            max-width: 700px;
        }

        .mode-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .mode-card {
            position: relative;
            min-height: 330px;
            padding: 28px;
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: var(--panel);
            box-shadow: 0 16px 42px rgba(0, 0, 0, .22);
            isolation: isolate;
        }

        .mode-card::before {
            position: absolute;
            z-index: -1;
            inset: 0;
            content: "";
            background: linear-gradient(180deg, rgba(8, 9, 15, .08) 12%, rgba(8, 9, 15, .96) 88%), var(--mode-image) center/cover;
            transition: transform .5s ease;
        }

        .mode-card:hover {
            border-color: var(--line-cyan);
            box-shadow: var(--glow), 0 20px 55px rgba(0, 0, 0, .32);
            transform: translateY(-5px);
        }

        .mode-card:hover::before {
            transform: scale(1.06);
        }

        .mode-card-content {
            display: flex;
            flex-direction: column;
            justify-content: end;
            min-height: 274px;
        }

        .tag {
            padding: 6px 10px;
            color: var(--cyan);
            border: 1px solid rgba(0, 240, 255, .35);
            background: rgba(0, 15, 35, .72);
        }

        .mode-card h3 {
            margin: 17px 0 8px;
            color: #fff;
            font-size: 1.55rem;
            letter-spacing: -.03em;
        }

        .mode-card p {
            max-width: 420px;
            margin-bottom: 18px;
            color: var(--muted-strong);
            font-size: .93rem;
        }

        .mode-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            width: fit-content;
            color: var(--cyan);
            font-size: .86rem;
            font-weight: 800;
        }

        .mode-link:hover {
            gap: 13px;
            color: #fff;
        }

        .play-section {
            background: linear-gradient(180deg, transparent, rgba(13, 25, 52, .35), transparent);
        }

        .play-layout {
            display: grid;
            grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
            align-items: stretch;
            gap: 48px;
        }

        .image-panel {
            position: relative;
            min-height: 420px;
            overflow: hidden;
            border: 1px solid var(--line-cyan);
            border-radius: var(--radius-lg);
            background: #0c1325;
            box-shadow: var(--shadow);
        }

        .image-panel img {
            width: 100%;
            height: 100%;
            min-height: 420px;
            object-fit: cover;
            opacity: .74;
        }

        .image-panel::after {
            position: absolute;
            inset: 0;
            content: "";
            background: linear-gradient(135deg, rgba(0, 82, 255, .18), rgba(8, 9, 15, .72));
        }

        .image-caption {
            position: absolute;
            z-index: 1;
            right: 24px;
            bottom: 24px;
            left: 24px;
            padding: 18px;
            border-left: 2px solid var(--cyan);
            background: rgba(8, 9, 15, .72);
            backdrop-filter: blur(10px);
        }

        .image-caption strong {
            display: block;
            margin-bottom: 5px;
            color: #fff;
            font-size: 1.13rem;
        }

        .image-caption span {
            color: var(--muted-strong);
            font-size: .85rem;
        }

        .play-copy {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .play-copy h2 {
            margin: 13px 0 15px;
            color: #fff;
            font-size: clamp(1.9rem, 3.2vw, 2.85rem);
            font-weight: 800;
            letter-spacing: -.045em;
            line-height: 1.1;
        }

        .play-copy > p {
            margin-bottom: 25px;
            color: var(--muted);
        }

        .step-list {
            display: grid;
            gap: 13px;
            margin: 0 0 28px;
            padding: 0;
            list-style: none;
        }

        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 13px 0;
            border-bottom: 1px solid var(--line);
        }

        .step-number {
            display: grid;
            place-items: center;
            width: 30px;
            height: 30px;
            flex: 0 0 30px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 9px;
            background: rgba(0, 240, 255, .07);
            font-size: .8rem;
            font-weight: 900;
        }

        .step-item strong {
            display: block;
            margin-bottom: 3px;
            color: #fff;
            font-size: .95rem;
        }

        .step-item span {
            display: block;
            color: var(--muted);
            font-size: .84rem;
            line-height: 1.5;
        }

        .benefit-section {
            padding-top: 35px;
        }

        .benefit-layout {
            display: grid;
            grid-template-columns: .8fr 1.2fr;
            gap: 55px;
            align-items: start;
        }

        .benefit-intro h2 {
            margin: 13px 0 15px;
            color: #fff;
            font-size: clamp(1.9rem, 3.2vw, 2.8rem);
            font-weight: 800;
            letter-spacing: -.045em;
            line-height: 1.1;
        }

        .benefit-intro p {
            color: var(--muted);
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 13px;
            margin-top: 28px;
        }

        .metric {
            padding: 17px;
            border-left: 2px solid var(--cyan);
            background: rgba(13, 17, 30, .55);
        }

        .metric strong {
            display: block;
            color: var(--cyan);
            font-size: 1.7rem;
            line-height: 1.2;
        }

        .metric span {
            display: block;
            margin-top: 4px;
            color: var(--muted);
            font-size: .78rem;
        }

        .feature-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .feature-item {
            min-height: 180px;
            padding: 22px;
            border: 1px solid var(--line);
            border-radius: 16px;
            background: linear-gradient(145deg, rgba(17, 26, 44, .86), rgba(13, 17, 30, .7));
            transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
        }

        .feature-item:hover {
            transform: translateY(-4px);
            border-color: var(--line-cyan);
            box-shadow: var(--glow);
        }

        .feature-icon {
            display: grid;
            place-items: center;
            width: 42px;
            height: 42px;
            margin-bottom: 18px;
            color: var(--cyan);
            border: 1px solid rgba(0, 240, 255, .34);
            border-radius: 12px;
            background: rgba(0, 240, 255, .08);
            font-size: 1.15rem;
        }

        .feature-item h3 {
            margin-bottom: 7px;
            color: #fff;
            font-size: 1rem;
            font-weight: 800;
        }

        .feature-item p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: .85rem;
            line-height: 1.55;
        }

        .guide-section {
            padding-top: 85px;
        }

        .guide-head {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 25px;
            margin-bottom: 35px;
        }

        .guide-head h2 {
            max-width: 700px;
            margin: 13px 0 0;
            color: #fff;
            font-size: clamp(1.9rem, 3.3vw, 3rem);
            font-weight: 800;
            letter-spacing: -.045em;
            line-height: 1.1;
        }

        .guide-head p {
            max-width: 390px;
            margin: 0;
            color: var(--muted);
            font-size: .94rem;
        }

        .guide-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .guide-box {
            padding: 28px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, .65);
        }

        .guide-box h3 {
            margin: 0 0 12px;
            color: #fff;
            font-size: 1.3rem;
        }

        .guide-box p {
            margin-bottom: 17px;
            color: var(--muted);
            font-size: .9rem;
        }

        .rule-list {
            display: grid;
            gap: 11px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .rule-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            color: var(--muted-strong);
            font-size: .87rem;
        }

        .rule-list li::before {
            content: "↗";
            color: var(--cyan);
            font-weight: 900;
        }

        .access-section {
            padding: 85px 0 90px;
            background:
                linear-gradient(90deg, rgba(0, 82, 255, .08), transparent 50%, rgba(0, 240, 255, .06)),
                rgba(10, 16, 31, .65);
            border-top: 1px solid rgba(0, 240, 255, .08);
            border-bottom: 1px solid rgba(0, 240, 255, .08);
        }

        .access-layout {
            display: grid;
            grid-template-columns: .9fr 1.1fr;
            gap: 50px;
            align-items: center;
        }

        .access-copy h2 {
            margin: 13px 0 13px;
            color: #fff;
            font-size: clamp(1.9rem, 3vw, 2.75rem);
            font-weight: 800;
            letter-spacing: -.045em;
            line-height: 1.1;
        }

        .access-copy p {
            margin-bottom: 0;
            color: var(--muted);
        }

        .access-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }

        .access-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            min-height: 76px;
            padding: 18px;
            border: 1px solid var(--line);
            border-radius: 14px;
            background: rgba(8, 9, 15, .54);
        }

        .access-link:hover {
            color: #fff;
            border-color: var(--cyan);
            background: rgba(0, 240, 255, .08);
            box-shadow: 0 0 24px rgba(0, 240, 255, .12);
            transform: translateY(-3px);
        }

        .access-link strong {
            display: block;
            color: #fff;
            font-size: .9rem;
        }

        .access-link small {
            display: block;
            margin-top: 3px;
            color: var(--muted);
            font-size: .74rem;
        }

        .access-arrow {
            color: var(--cyan);
            font-size: 1.25rem;
        }

        .news-section {
            padding-bottom: 90px;
        }

        .news-layout {
            display: grid;
            grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
            gap: 25px;
        }

        .news-list {
            margin: 0;
            padding: 0;
            list-style: none;
            border-top: 1px solid var(--line);
        }

        .news-row {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 18px;
            padding: 20px 0;
            border-bottom: 1px solid var(--line);
        }

        .news-row a {
            color: #fff;
            font-size: 1rem;
            font-weight: 750;
        }

        .news-row a:hover {
            color: var(--cyan);
        }

        .news-summary {
            margin: 6px 0 7px;
            color: var(--muted);
            font-size: .85rem;
            line-height: 1.55;
        }

        .news-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            color: #71809a;
            font-size: .73rem;
        }

        .news-meta span:first-child {
            color: var(--cyan-soft);
        }

        .news-date {
            align-self: start;
            color: var(--muted);
            font-size: .76rem;
            white-space: nowrap;
        }

        .recommendation {
            position: relative;
            min-height: 300px;
            overflow: hidden;
            border: 1px solid var(--line-cyan);
            border-radius: var(--radius-md);
            background: #0d111e;
        }

        .recommendation img {
            width: 100%;
            height: 100%;
            min-height: 300px;
            object-fit: cover;
            opacity: .62;
        }

        .recommendation::after {
            position: absolute;
            inset: 0;
            content: "";
            background: linear-gradient(180deg, rgba(8, 9, 15, .06), rgba(8, 9, 15, .96));
        }

        .recommendation-content {
            position: absolute;
            z-index: 1;
            right: 22px;
            bottom: 22px;
            left: 22px;
        }

        .recommendation-content .tag {
            margin-bottom: 14px;
        }

        .recommendation-content h3 {
            margin-bottom: 8px;
            color: #fff;
            font-size: 1.28rem;
        }

        .recommendation-content p {
            margin-bottom: 0;
            color: var(--muted-strong);
            font-size: .85rem;
        }

        .faq-section {
            padding: 84px 0 100px;
            background: radial-gradient(circle at 50% 100%, rgba(0, 82, 255, .1), transparent 36rem);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .75fr 1.25fr;
            gap: 65px;
            align-items: start;
        }

        .faq-intro h2 {
            margin: 13px 0;
            color: #fff;
            font-size: clamp(1.9rem, 3vw, 2.75rem);
            font-weight: 800;
            letter-spacing: -.045em;
            line-height: 1.1;
        }

        .faq-intro p {
            margin-bottom: 22px;
            color: var(--muted);
        }

        .faq-accordion .accordion-item {
            margin-bottom: 10px;
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: 14px;
            background: rgba(13, 17, 30, .72);
        }

        .faq-accordion .accordion-button {
            padding: 19px 21px;
            color: #fff;
            background: transparent;
            box-shadow: none;
            font-size: .96rem;
            font-weight: 750;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--cyan);
            background: rgba(0, 240, 255, .055);
        }

        .faq-accordion .accordion-button::after {
            filter: invert(75%) sepia(92%) saturate(950%) hue-rotate(145deg);
        }

        .faq-accordion .accordion-body {
            padding: 0 21px 20px;
            color: var(--muted-strong);
            font-size: .88rem;
            line-height: 1.65;
        }

        .final-cta {
            position: relative;
            padding: 78px 0;
            overflow: hidden;
            text-align: center;
            background:
                linear-gradient(110deg, rgba(0, 82, 255, .76), rgba(0, 21, 55, .9) 54%, rgba(0, 240, 255, .28)),
                url('/assets/images/backpic/back-2.jpg') center/cover;
            border-top: 1px solid var(--line-cyan);
            border-bottom: 1px solid var(--line-cyan);
        }

        .final-cta::before,
        .final-cta::after {
            position: absolute;
            width: 220px;
            height: 220px;
            content: "";
            border: 1px solid rgba(255, 255, 255, .16);
            border-radius: 50%;
        }

        .final-cta::before {
            top: -120px;
            left: 8%;
        }

        .final-cta::after {
            right: 7%;
            bottom: -145px;
        }

        .final-cta h2 {
            position: relative;
            z-index: 1;
            max-width: 750px;
            margin: 0 auto 14px;
            color: #fff;
            font-size: clamp(2rem, 4vw, 3.35rem);
            font-weight: 850;
            letter-spacing: -.055em;
            line-height: 1.08;
        }

        .final-cta p {
            position: relative;
            z-index: 1;
            max-width: 610px;
            margin: 0 auto 26px;
            color: rgba(255, 255, 255, .82);
        }

        .final-cta .btn {
            position: relative;
            z-index: 1;
            color: #07101e;
            border-color: #fff;
            background: #fff;
            box-shadow: 0 0 26px rgba(255, 255, 255, .25);
        }

        .final-cta .btn:hover {
            color: #07101e;
            background: var(--cyan-soft);
            box-shadow: 0 0 34px rgba(0, 240, 255, .55);
        }

        .site-footer {
            padding: 54px 0 25px;
            background: #06070c;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr .8fr .8fr;
            gap: 40px;
            padding-bottom: 38px;
            border-bottom: 1px solid var(--line);
        }

        .footer-brand {
            margin-bottom: 15px;
        }

        .footer-about {
            max-width: 360px;
            margin-bottom: 0;
            color: var(--muted);
            font-size: .86rem;
        }

        .footer-title {
            margin: 4px 0 16px;
            color: #fff;
            font-size: .82rem;
            font-weight: 850;
            letter-spacing: .1em;
            text-transform: uppercase;
        }

        .footer-links {
            display: grid;
            gap: 9px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .footer-links a {
            color: var(--muted);
            font-size: .86rem;
        }

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

        .trust-line {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 19px;
        }

        .trust-badge {
            padding: 6px 9px;
            color: var(--cyan-soft);
            border: 1px solid var(--line);
            border-radius: 8px;
            background: rgba(0, 240, 255, .045);
            font-size: .72rem;
            font-weight: 700;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding-top: 21px;
            color: #67748a;
            font-size: .76rem;
        }

        .footer-bottom span:last-child {
            color: #8795aa;
        }

        .support-fab {
            position: fixed;
            z-index: 1050;
            bottom: 6rem;
            left: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 9px;
            min-width: 58px;
            min-height: 52px;
            padding: 10px 15px;
            color: var(--cyan);
            border: 1px solid transparent;
            border-radius: 999px;
            background:
                linear-gradient(#090d18, #090d18) padding-box,
                linear-gradient(120deg, var(--cyan), var(--blue), #ff4aa2) border-box;
            box-shadow: 0 0 18px rgba(0, 240, 255, .32);
            opacity: .72;
            backdrop-filter: blur(12px);
            animation: fabBreath 3.2s ease-in-out infinite;
        }

        .support-fab:hover {
            color: #fff;
            opacity: 1;
            box-shadow: 0 0 32px rgba(0, 240, 255, .58);
            transform: scale(1.08);
        }

        .support-fab:active {
            transform: scale(.95);
        }

        .support-fab svg {
            width: 22px;
            height: 22px;
            transition: transform .45s ease;
        }

        .support-fab:hover svg {
            transform: rotate(360deg);
        }

        .support-fab small {
            font-size: .74rem;
            font-weight: 800;
        }

        .fab-dot {
            position: absolute;
            top: -3px;
            right: 0;
            width: 10px;
            height: 10px;
            border: 2px solid #090d18;
            border-radius: 50%;
            background: var(--danger);
            box-shadow: 0 0 10px var(--danger);
            animation: blink 1.6s ease-in-out infinite;
        }

        @keyframes fabBreath {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, .25); }
            50% { box-shadow: 0 0 27px rgba(0, 240, 255, .5); }
        }

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

        @media (max-width: 991.98px) {
            .nav-list {
                margin: 15px 0 5px;
                padding-top: 8px;
                border-top: 1px solid var(--line);
            }

            .nav-actions {
                gap: 10px;
            }

            .hero {
                padding-top: 50px;
            }

            .hero-grid,
            .play-layout,
            .benefit-layout,
            .access-layout,
            .faq-layout {
                gap: 30px;
            }

            .hero-main {
                padding: 42px;
            }

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

            .recommendation {
                min-height: 240px;
            }

            .recommendation img {
                min-height: 240px;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                width: min(100% - 30px, 600px);
            }

            .navbar {
                min-height: 70px;
            }

            .brand {
                max-width: 215px;
                font-size: .9rem;
            }

            .brand-mark {
                width: 36px;
                height: 36px;
                flex-basis: 36px;
            }

            .nav-actions {
                justify-content: flex-start;
                width: 100%;
                margin: 12px 0 2px;
                padding-top: 12px;
                border-top: 1px solid var(--line);
            }

            .login-link {
                padding-left: 4px;
            }

            .hero {
                padding: 35px 0 25px;
            }

            .hero-grid {
                display: flex;
                flex-direction: column;
            }

            .hero-main {
                min-height: auto;
                padding: 31px 24px;
                clip-path: none;
            }

            h1 {
                margin-top: 17px;
                font-size: clamp(2.15rem, 10vw, 3.5rem);
            }

            .hero-data {
                gap: 17px;
            }

            .data-point strong {
                font-size: 1.05rem;
            }

            .hero-mini {
                min-height: 148px;
            }

            .hero-strip {
                align-items: flex-start;
                flex-direction: column;
                padding: 18px;
            }

            .section,
            .section-sm {
                padding: 67px 0;
            }

            .section-heading,
            .section-heading.split {
                display: block;
                margin-bottom: 28px;
            }

            .section-heading h2,
            .guide-head h2 {
                font-size: 2rem;
            }

            .section-heading p {
                font-size: .93rem;
            }

            .mode-layout,
            .guide-grid,
            .feature-list,
            .access-grid {
                grid-template-columns: 1fr;
            }

            .mode-card {
                min-height: 290px;
            }

            .mode-card-content {
                min-height: 235px;
            }

            .play-layout,
            .benefit-layout,
            .access-layout,
            .faq-layout {
                grid-template-columns: 1fr;
            }

            .image-panel,
            .image-panel img {
                min-height: 310px;
            }

            .play-copy h2,
            .benefit-intro h2,
            .access-copy h2,
            .faq-intro h2 {
                font-size: 2rem;
            }

            .benefit-section {
                padding-top: 35px;
            }

            .guide-head {
                display: block;
                margin-bottom: 28px;
            }

            .guide-head p {
                margin-top: 15px;
            }

            .metric-grid {
                margin-bottom: 25px;
            }

            .access-section {
                padding: 67px 0;
            }

            .news-row {
                grid-template-columns: 1fr;
                gap: 5px;
            }

            .news-date {
                order: -1;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px 20px;
            }

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

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

        @media (max-width: 519.98px) {
            .container {
                width: calc(100% - 24px);
            }

            .brand {
                max-width: 190px;
                font-size: .8rem;
            }

            .nav-actions {
                gap: 9px;
            }

            .nav-actions .btn {
                min-height: 42px;
                padding: 10px 14px;
                font-size: .78rem;
            }

            .hero-main {
                padding: 27px 19px;
            }

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

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

            .hero-data {
                justify-content: space-between;
                gap: 10px;
            }

            .data-point span {
                font-size: .7rem;
            }

            .hero-mini {
                padding: 19px;
            }

            .feature-item,
            .guide-box {
                padding: 20px;
            }

            .support-fab {
                left: 12px;
                bottom: 24px;
                min-width: 52px;
                padding: 12px;
            }

            .support-fab small {
                display: none;
            }

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

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

/* roulang page: category1 */
:root {
            --bg: #08090f;
            --bg-soft: #0b1020;
            --panel: rgba(13, 17, 30, .82);
            --panel-solid: #0d111e;
            --panel-light: #111a2c;
            --blue: #0052ff;
            --blue-light: #3c7cff;
            --cyan: #00f0ff;
            --cyan-soft: #8cefff;
            --text: #f7fbff;
            --muted: #9aa8be;
            --muted-strong: #cbd5e1;
            --line: rgba(133, 164, 216, .18);
            --line-cyan: rgba(0, 240, 255, .32);
            --success: #76f6b5;
            --danger: #ff557c;
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 28px;
            --shadow: 0 20px 60px rgba(0, 0, 0, .35);
            --glow: 0 0 28px rgba(0, 240, 255, .18);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            min-width: 320px;
            margin: 0;
            color: var(--text);
            background:
                radial-gradient(circle at 8% 5%, rgba(0, 82, 255, .14), transparent 28rem),
                radial-gradient(circle at 90% 30%, rgba(0, 240, 255, .08), transparent 24rem),
                var(--bg);
            font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
            font-size: 16px;
            line-height: 1.62;
            overflow-x: hidden;
        }

        h1,
        h2,
        h3,
        p {
            margin-top: 0;
        }

        h1,
        h2,
        h3 {
            line-height: 1.16;
            letter-spacing: -.035em;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, background-color .25s ease, border-color .25s ease, transform .25s ease, box-shadow .25s ease;
        }

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

        button,
        input {
            font: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(0, 240, 255, .72);
            outline-offset: 4px;
        }

        .container {
            width: min(1180px, calc(100% - 40px));
            margin: 0 auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, .84);
            border-bottom: 1px solid rgba(0, 240, 255, .12);
            box-shadow: 0 10px 35px rgba(0, 0, 0, .22);
            backdrop-filter: blur(18px);
        }

        .navbar {
            min-height: 78px;
            padding: 12px 0;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            max-width: 260px;
            color: var(--text);
            font-size: 1.05rem;
            font-weight: 800;
            letter-spacing: -.02em;
            line-height: 1.12;
        }

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

        .brand-mark {
            display: inline-grid;
            flex: 0 0 40px;
            place-items: center;
            width: 40px;
            height: 40px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 13px;
            background: linear-gradient(145deg, rgba(0, 82, 255, .28), rgba(0, 240, 255, .08));
            box-shadow: inset 0 0 18px rgba(0, 240, 255, .12), 0 0 18px rgba(0, 82, 255, .16);
            font-size: 1.25rem;
        }

        .navbar-toggler {
            padding: 8px 10px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 10px;
            background: rgba(0, 240, 255, .06);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 .2rem rgba(0, 240, 255, .2);
        }

        .navbar-toggler-icon {
            filter: invert(82%) sepia(99%) saturate(1800%) hue-rotate(150deg) brightness(105%);
        }

        .nav-list {
            gap: 5px;
            margin-left: 32px;
        }

        .nav-link {
            position: relative;
            padding: 10px 14px !important;
            color: var(--muted-strong) !important;
            font-size: .93rem;
            font-weight: 600;
        }

        .nav-link::after {
            position: absolute;
            right: 14px;
            bottom: 3px;
            left: 14px;
            height: 2px;
            content: "";
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan);
            transform: scaleX(0);
            transition: transform .25s ease;
        }

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

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 13px;
            margin-left: auto;
        }

        .login-link {
            color: var(--muted-strong);
            font-size: .92rem;
            font-weight: 700;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 11px 20px;
            color: var(--text);
            border: 1px solid transparent;
            border-radius: 12px;
            font-size: .92rem;
            font-weight: 800;
            line-height: 1;
            transition: transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease;
        }

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

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

        .btn-primary {
            color: #fff;
            border-color: rgba(126, 220, 255, .55);
            background: linear-gradient(110deg, var(--blue), #087bff 55%, var(--cyan));
            box-shadow: 0 0 23px rgba(0, 82, 255, .35);
        }

        .btn-primary:hover {
            box-shadow: 0 0 32px rgba(0, 240, 255, .45);
        }

        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-cyan);
            background: rgba(0, 240, 255, .045);
        }

        .btn-outline:hover {
            border-color: var(--cyan);
            background: rgba(0, 240, 255, .12);
            box-shadow: 0 0 24px rgba(0, 240, 255, .18);
        }

        .btn-dark {
            color: var(--muted-strong);
            border-color: var(--line);
            background: rgba(255, 255, 255, .04);
        }

        .btn-dark:hover {
            color: var(--text);
            border-color: var(--line-cyan);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 18px;
            color: var(--cyan);
            font-size: .76rem;
            font-weight: 800;
            letter-spacing: .14em;
            text-transform: uppercase;
        }

        .eyebrow::before {
            width: 25px;
            height: 1px;
            content: "";
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan);
        }

        .section {
            position: relative;
            padding: 96px 0;
        }

        .section-heading {
            max-width: 680px;
            margin-bottom: 42px;
        }

        .section-heading h2 {
            margin-bottom: 16px;
            color: var(--text);
            font-size: clamp(2rem, 4vw, 3.25rem);
        }

        .section-heading p {
            max-width: 620px;
            margin-bottom: 0;
            color: var(--muted);
        }

        .category-hero {
            position: relative;
            min-height: 650px;
            overflow: hidden;
            border-bottom: 1px solid rgba(0, 240, 255, .16);
            background: #080d1a;
        }

        .video-stage {
            position: absolute;
            inset: 0;
            background:
                linear-gradient(90deg, rgba(4, 7, 15, .96) 0%, rgba(5, 10, 24, .78) 42%, rgba(5, 10, 24, .3) 100%),
                linear-gradient(0deg, rgba(8, 9, 15, .93), transparent 45%),
                url('/assets/images/backpic/back-1.jpg') center / cover no-repeat;
        }

        .video-stage::after {
            position: absolute;
            inset: 0;
            content: "";
            opacity: .23;
            background-image:
                linear-gradient(rgba(0, 240, 255, .16) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, .16) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: linear-gradient(90deg, rgba(0, 0, 0, .8), transparent 88%);
        }

        .hero-video {
            position: absolute;
            width: 1px;
            height: 1px;
            opacity: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: minmax(0, 1.15fr) minmax(310px, .85fr);
            align-items: center;
            gap: 70px;
            min-height: 650px;
            padding-top: 70px;
            padding-bottom: 70px;
        }

        .hero-copy {
            max-width: 700px;
        }

        .hero-copy h1 {
            max-width: 760px;
            margin-bottom: 22px;
            font-size: clamp(2.5rem, 5.3vw, 5rem);
        }

        .hero-copy h1 strong {
            color: var(--cyan);
            font-weight: inherit;
            text-shadow: 0 0 26px rgba(0, 240, 255, .24);
        }

        .hero-copy p {
            max-width: 640px;
            margin-bottom: 30px;
            color: var(--muted-strong);
            font-size: 1.08rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 13px;
        }

        .hero-note {
            display: flex;
            align-items: center;
            gap: 9px;
            margin-top: 23px;
            color: var(--muted);
            font-size: .88rem;
        }

        .live-dot {
            display: inline-block;
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 15px var(--success);
            animation: breathe 2.2s ease-in-out infinite;
        }

        .hero-side {
            position: relative;
            padding: 24px;
            border: 1px solid rgba(0, 240, 255, .32);
            border-radius: var(--radius-lg);
            background: rgba(8, 14, 30, .63);
            box-shadow: var(--shadow), inset 0 0 35px rgba(0, 240, 255, .06);
            backdrop-filter: blur(15px);
        }

        .hero-side::before {
            position: absolute;
            top: 0;
            right: 26px;
            left: 26px;
            height: 1px;
            content: "";
            background: linear-gradient(90deg, transparent, var(--cyan), transparent);
            box-shadow: 0 0 16px var(--cyan);
        }

        .preview-label {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
            color: var(--muted-strong);
            font-size: .82rem;
            font-weight: 700;
        }

        .preview-status {
            color: var(--success);
            font-size: .73rem;
            letter-spacing: .08em;
            text-transform: uppercase;
        }

        .preview-board {
            position: relative;
            min-height: 245px;
            overflow: hidden;
            padding: 18px;
            border: 1px solid var(--line);
            border-radius: 18px;
            background:
                radial-gradient(circle at 50% 40%, rgba(0, 240, 255, .13), transparent 48%),
                #0b1425;
        }

        .preview-board::before,
        .preview-board::after {
            position: absolute;
            content: "";
            border: 1px solid rgba(0, 240, 255, .1);
            border-radius: 50%;
        }

        .preview-board::before {
            width: 260px;
            height: 260px;
            top: -90px;
            right: -100px;
        }

        .preview-board::after {
            width: 180px;
            height: 180px;
            bottom: -100px;
            left: -60px;
        }

        .card-layout {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            gap: 8px;
            margin-top: 26px;
        }

        .playing-card {
            display: grid;
            place-items: center;
            min-height: 72px;
            color: #10213b;
            border: 1px solid rgba(255, 255, 255, .72);
            border-radius: 8px;
            background: linear-gradient(145deg, #fff, #cce5f1);
            box-shadow: 0 8px 14px rgba(0, 0, 0, .25);
            font-size: .9rem;
            font-weight: 900;
        }

        .playing-card:nth-child(2n) {
            color: #c22c55;
            transform: translateY(18px);
        }

        .playing-card:nth-child(4n) {
            transform: translateY(35px);
        }

        .play-control {
            position: absolute;
            right: 18px;
            bottom: 18px;
            z-index: 2;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 13px;
            color: var(--text);
            border: 1px solid var(--line-cyan);
            border-radius: 10px;
            background: rgba(0, 240, 255, .12);
            font-size: .78rem;
            font-weight: 800;
            cursor: pointer;
        }

        .play-control:hover {
            background: rgba(0, 240, 255, .24);
            box-shadow: 0 0 18px rgba(0, 240, 255, .25);
        }

        .preview-footer {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 18px;
        }

        .preview-footer div {
            padding: 12px 14px;
            border-left: 2px solid var(--blue-light);
            background: rgba(255, 255, 255, .035);
        }

        .preview-footer small {
            display: block;
            margin-bottom: 3px;
            color: var(--muted);
            font-size: .72rem;
        }

        .preview-footer strong {
            color: var(--cyan-soft);
            font-size: .92rem;
        }

        .breadcrumb-bar {
            padding: 16px 0;
            border-bottom: 1px solid var(--line);
            background: rgba(11, 16, 32, .65);
        }

        .breadcrumb {
            margin: 0;
            --bs-breadcrumb-divider-color: var(--muted);
            font-size: .83rem;
        }

        .breadcrumb-item,
        .breadcrumb-item a {
            color: var(--muted);
        }

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

        .breadcrumb-item.active {
            color: var(--cyan-soft);
        }

        .metric-section {
            padding: 38px 0 30px;
            background: rgba(11, 16, 32, .72);
        }

        .metric-board {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, .72);
            box-shadow: var(--shadow);
        }

        .metric {
            position: relative;
            min-height: 130px;
            padding: 25px 24px;
            border-right: 1px solid var(--line);
        }

        .metric:last-child {
            border-right: 0;
        }

        .metric-number {
            display: block;
            margin-bottom: 4px;
            color: var(--cyan);
            font-size: 2rem;
            font-weight: 900;
            letter-spacing: -.06em;
        }

        .metric-label {
            display: block;
            color: var(--muted-strong);
            font-size: .9rem;
            font-weight: 700;
        }

        .metric-caption {
            display: block;
            margin-top: 8px;
            color: var(--muted);
            font-size: .77rem;
        }

        .matrix-section {
            background: linear-gradient(180deg, rgba(8, 9, 15, 0), rgba(13, 17, 30, .42));
        }

        .matrix-layout {
            display: grid;
            grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
            gap: 64px;
            align-items: start;
        }

        .image-panel {
            position: sticky;
            top: 110px;
            overflow: hidden;
            border: 1px solid var(--line-cyan);
            border-radius: var(--radius-lg);
            background: var(--panel-solid);
            box-shadow: var(--shadow), var(--glow);
        }

        .image-panel img {
            width: 100%;
            aspect-ratio: 1.12 / 1;
            object-fit: cover;
            opacity: .86;
        }

        .image-panel figcaption {
            padding: 18px 20px 20px;
            color: var(--muted-strong);
            font-size: .9rem;
        }

        .image-panel figcaption strong {
            display: block;
            margin-bottom: 4px;
            color: var(--text);
            font-size: 1rem;
        }

        .feature-matrix {
            border-top: 1px solid var(--line);
        }

        .feature-row {
            display: grid;
            grid-template-columns: 52px minmax(0, 1fr);
            gap: 18px;
            padding: 24px 0;
            border-bottom: 1px solid var(--line);
        }

        .feature-icon {
            display: grid;
            place-items: center;
            width: 42px;
            height: 42px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 12px;
            background: rgba(0, 240, 255, .06);
            font-size: 1.1rem;
        }

        .feature-row h3 {
            margin-bottom: 7px;
            font-size: 1.15rem;
        }

        .feature-row p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: .94rem;
        }

        .feature-tag {
            display: inline-block;
            margin-top: 11px;
            padding: 4px 9px;
            color: var(--cyan-soft);
            border: 1px solid rgba(0, 240, 255, .2);
            border-radius: 999px;
            background: rgba(0, 240, 255, .06);
            font-size: .72rem;
            font-weight: 800;
        }

        .flow-section {
            background: #0b1020;
        }

        .flow-layout {
            display: grid;
            grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr);
            gap: 70px;
            align-items: start;
        }

        .flow-intro {
            position: sticky;
            top: 110px;
        }

        .flow-intro h2 {
            margin-bottom: 16px;
            font-size: clamp(2rem, 3.7vw, 3.1rem);
        }

        .flow-intro p {
            margin-bottom: 25px;
            color: var(--muted);
        }

        .flow-list {
            border-top: 1px solid var(--line);
        }

        .flow-item {
            display: grid;
            grid-template-columns: 64px minmax(0, 1fr);
            gap: 20px;
            padding: 26px 0;
            border-bottom: 1px solid var(--line);
        }

        .flow-number {
            color: var(--cyan);
            font-size: 1.7rem;
            font-weight: 900;
            line-height: 1;
        }

        .flow-item h3 {
            margin-bottom: 7px;
            font-size: 1.15rem;
        }

        .flow-item p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: .94rem;
        }

        .comparison-section {
            padding-top: 88px;
        }

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

        .comparison-column {
            position: relative;
            padding: 29px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, .72);
        }

        .comparison-column.highlight {
            border-color: rgba(0, 240, 255, .38);
            background:
                linear-gradient(145deg, rgba(0, 82, 255, .17), rgba(0, 240, 255, .04)),
                rgba(13, 17, 30, .78);
            box-shadow: var(--glow);
        }

        .comparison-column h3 {
            margin-bottom: 8px;
            font-size: 1.3rem;
        }

        .comparison-column > p {
            min-height: 52px;
            margin-bottom: 22px;
            color: var(--muted);
            font-size: .92rem;
        }

        .comparison-list {
            display: grid;
            gap: 13px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .comparison-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--muted-strong);
            font-size: .91rem;
        }

        .comparison-list li::before {
            flex: 0 0 auto;
            width: 19px;
            height: 19px;
            margin-top: 3px;
            content: "✓";
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 50%;
            font-size: .7rem;
            line-height: 17px;
            text-align: center;
        }

        .experience-section {
            padding-top: 36px;
        }

        .experience-layout {
            display: grid;
            grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
            gap: 40px;
            align-items: center;
        }

        .experience-copy h2 {
            margin-bottom: 16px;
            font-size: clamp(2rem, 4vw, 3rem);
        }

        .experience-copy > p {
            max-width: 630px;
            color: var(--muted);
        }

        .experience-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px 28px;
            margin-top: 28px;
        }

        .experience-point {
            padding-top: 14px;
            border-top: 1px solid var(--line);
        }

        .experience-point strong {
            display: block;
            margin-bottom: 4px;
            color: var(--text);
            font-size: .94rem;
        }

        .experience-point span {
            color: var(--muted);
            font-size: .84rem;
        }

        .experience-image {
            overflow: hidden;
            border-radius: var(--radius-lg);
            border: 1px solid var(--line-cyan);
            box-shadow: var(--shadow);
        }

        .experience-image img {
            width: 100%;
            aspect-ratio: 1.2 / 1;
            object-fit: cover;
            transition: transform .6s ease, filter .6s ease;
        }

        .experience-image:hover img {
            filter: saturate(1.15);
            transform: scale(1.04);
        }

        .faq-section {
            background:
                radial-gradient(circle at 85% 30%, rgba(0, 82, 255, .11), transparent 22rem),
                #0b1020;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .68fr 1.32fr;
            gap: 75px;
            align-items: start;
        }

        .faq-title h2 {
            margin-bottom: 15px;
            font-size: clamp(2rem, 3.6vw, 3rem);
        }

        .faq-title p {
            color: var(--muted);
        }

        .accordion {
            --bs-accordion-bg: transparent;
            --bs-accordion-color: var(--muted-strong);
            --bs-accordion-border-color: var(--line);
            --bs-accordion-btn-color: var(--text);
            --bs-accordion-btn-bg: transparent;
            --bs-accordion-active-color: var(--cyan);
            --bs-accordion-active-bg: rgba(0, 240, 255, .04);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 .2rem rgba(0, 240, 255, .12);
        }

        .accordion-item {
            margin-bottom: 12px;
            overflow: hidden;
            border: 1px solid var(--line) !important;
            border-radius: 14px !important;
            background: rgba(13, 17, 30, .58);
        }

        .accordion-button {
            padding: 20px 22px;
            font-size: .98rem;
            font-weight: 800;
        }

        .accordion-button::after {
            filter: invert(80%) sepia(65%) saturate(1000%) hue-rotate(150deg);
        }

        .accordion-body {
            padding: 0 22px 20px;
            color: var(--muted);
            font-size: .92rem;
        }

        .cta-section {
            padding: 86px 0;
            background:
                linear-gradient(115deg, rgba(0, 82, 255, .84), rgba(0, 130, 202, .64)),
                url('/assets/images/backpic/back-2.jpg') center / cover no-repeat;
        }

        .cta-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(300px, .8fr);
            gap: 55px;
            align-items: center;
        }

        .cta-copy h2 {
            max-width: 690px;
            margin-bottom: 15px;
            font-size: clamp(2rem, 4vw, 3.3rem);
        }

        .cta-copy p {
            max-width: 650px;
            margin-bottom: 0;
            color: rgba(255, 255, 255, .8);
        }

        .quick-form {
            padding: 24px;
            border: 1px solid rgba(255, 255, 255, .32);
            border-radius: var(--radius-md);
            background: rgba(4, 8, 19, .56);
            box-shadow: 0 20px 45px rgba(0, 0, 0, .2);
            backdrop-filter: blur(14px);
        }

        .quick-form label {
            display: block;
            margin-bottom: 7px;
            color: var(--muted-strong);
            font-size: .8rem;
            font-weight: 800;
        }

        .quick-form .form-control {
            min-height: 46px;
            margin-bottom: 16px;
            color: var(--text);
            border: 1px solid rgba(140, 239, 255, .25);
            border-radius: 11px;
            background: rgba(255, 255, 255, .07);
        }

        .quick-form .form-control:focus {
            color: var(--text);
            border-color: var(--cyan);
            background: rgba(255, 255, 255, .1);
            box-shadow: 0 0 0 .2rem rgba(0, 240, 255, .13);
        }

        .quick-form .form-control::placeholder {
            color: #8290a8;
        }

        .form-feedback {
            display: none;
            margin-top: 12px;
            color: var(--success);
            font-size: .83rem;
        }

        .form-feedback.show {
            display: block;
        }

        .site-footer {
            padding: 68px 0 22px;
            border-top: 1px solid rgba(0, 240, 255, .16);
            background: #07080d;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.45fr .75fr .85fr;
            gap: 60px;
            padding-bottom: 46px;
        }

        .footer-brand {
            margin-bottom: 18px;
        }

        .footer-about {
            max-width: 390px;
            margin-bottom: 20px;
            color: var(--muted);
            font-size: .91rem;
        }

        .trust-line {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .trust-badge {
            padding: 6px 10px;
            color: var(--cyan-soft);
            border: 1px solid var(--line-cyan);
            border-radius: 999px;
            background: rgba(0, 240, 255, .05);
            font-size: .72rem;
            font-weight: 800;
        }

        .footer-title {
            margin: 5px 0 16px;
            color: var(--text);
            font-size: .95rem;
            letter-spacing: .01em;
        }

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

        .footer-links a {
            color: var(--muted);
            font-size: .87rem;
        }

        .footer-links a:hover {
            color: var(--cyan);
            transform: translateX(3px);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 20px;
            color: #748198;
            border-top: 1px solid var(--line);
            font-size: .78rem;
        }

        .fab-support {
            position: fixed;
            z-index: 50;
            bottom: 96px;
            left: 16px;
            display: inline-flex;
            align-items: center;
            gap: 9px;
            min-height: 52px;
            padding: 10px 15px;
            color: var(--cyan);
            border: 1px solid transparent;
            border-radius: 15px;
            background:
                linear-gradient(#090e1b, #090e1b) padding-box,
                linear-gradient(135deg, var(--cyan), var(--blue), #6b4dff) border-box;
            box-shadow: 0 0 18px rgba(0, 240, 255, .36);
            opacity: .78;
            font-size: .8rem;
            font-weight: 800;
            animation: fabFloat 3s ease-in-out infinite;
        }

        .fab-support::after {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 10px;
            height: 10px;
            content: "";
            border: 2px solid #090e1b;
            border-radius: 50%;
            background: var(--danger);
            box-shadow: 0 0 10px var(--danger);
        }

        .fab-support:hover {
            color: #fff;
            opacity: 1;
            box-shadow: 0 0 29px rgba(0, 240, 255, .65);
            transform: translateY(-3px) scale(1.05);
        }

        .fab-icon {
            font-size: 1.05rem;
        }

        .sr-only-note {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        @keyframes breathe {
            0%, 100% { opacity: .55; transform: scale(.9); }
            50% { opacity: 1; transform: scale(1.1); }
        }

        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-5px); }
        }

        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: minmax(0, 1fr) minmax(280px, .82fr);
                gap: 35px;
            }

            .matrix-layout,
            .flow-layout,
            .faq-layout {
                gap: 38px;
            }

            .footer-grid {
                gap: 30px;
            }
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                padding: 15px 0 8px;
            }

            .nav-list {
                gap: 0;
                margin-left: 0;
            }

            .nav-link {
                padding: 12px 0 !important;
            }

            .nav-link::after {
                right: auto;
                bottom: 5px;
                left: 0;
                width: 34px;
            }

            .nav-actions {
                justify-content: flex-start;
                margin-top: 10px;
                margin-left: 0;
            }

            .hero-content {
                grid-template-columns: 1fr;
                padding-top: 55px;
                padding-bottom: 55px;
            }

            .hero-side {
                max-width: 580px;
            }

            .image-panel,
            .flow-intro {
                position: static;
            }

            .matrix-layout,
            .flow-layout,
            .faq-layout {
                grid-template-columns: 1fr;
            }

            .matrix-layout {
                gap: 38px;
            }

            .image-panel {
                max-width: 620px;
            }

            .flow-intro {
                max-width: 690px;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                width: min(100% - 30px, 620px);
            }

            .section {
                padding: 70px 0;
            }

            .category-hero,
            .hero-content {
                min-height: 0;
            }

            .category-hero {
                min-height: 700px;
            }

            .hero-copy h1 {
                font-size: clamp(2.2rem, 10vw, 3.7rem);
            }

            .hero-copy p {
                font-size: 1rem;
            }

            .metric-board {
                grid-template-columns: 1fr 1fr;
            }

            .metric:nth-child(2) {
                border-right: 0;
            }

            .metric:nth-child(-n+2) {
                border-bottom: 1px solid var(--line);
            }

            .metric {
                min-height: 116px;
                padding: 20px 17px;
            }

            .metric-number {
                font-size: 1.75rem;
            }

            .comparison-layout,
            .experience-layout,
            .cta-layout {
                grid-template-columns: 1fr;
            }

            .comparison-column {
                padding: 23px;
            }

            .comparison-column > p {
                min-height: auto;
            }

            .experience-points {
                gap: 14px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 34px 22px;
            }

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

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .brand {
                max-width: 200px;
                font-size: .92rem;
            }

            .brand-mark {
                width: 36px;
                height: 36px;
                flex-basis: 36px;
            }

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

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

            .hero-side {
                padding: 17px;
            }

            .card-layout {
                gap: 4px;
            }

            .playing-card {
                min-height: 59px;
                font-size: .72rem;
            }

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

            .feature-row,
            .flow-item {
                grid-template-columns: 40px minmax(0, 1fr);
                gap: 13px;
            }

            .feature-icon {
                width: 36px;
                height: 36px;
                font-size: .95rem;
            }

            .experience-points {
                grid-template-columns: 1fr;
            }

            .quick-form {
                padding: 19px;
            }

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

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

            .fab-support {
                bottom: 22px;
                left: 14px;
            }
        }

/* roulang page: article */
:root {
            --bg: #08090f;
            --bg-soft: #0b1020;
            --panel: rgba(13, 17, 30, .82);
            --panel-solid: #0d111e;
            --panel-light: #111a2c;
            --blue: #0052ff;
            --blue-light: #3c7cff;
            --cyan: #00f0ff;
            --cyan-soft: #8cefff;
            --text: #f7fbff;
            --muted: #9aa8be;
            --muted-strong: #cbd5e1;
            --line: rgba(133, 164, 216, .18);
            --line-cyan: rgba(0, 240, 255, .32);
            --success: #76f6b5;
            --danger: #ff557c;
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 28px;
            --shadow: 0 20px 60px rgba(0, 0, 0, .35);
            --glow: 0 0 28px rgba(0, 240, 255, .18);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            min-width: 320px;
            color: var(--text);
            background:
                radial-gradient(circle at 8% 5%, rgba(0, 82, 255, .14), transparent 28rem),
                radial-gradient(circle at 90% 30%, rgba(0, 240, 255, .08), transparent 24rem),
                var(--bg);
            font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
            font-size: 16px;
            line-height: 1.62;
            overflow-x: hidden;
        }

        body::before {
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            content: "";
            opacity: .22;
            background-image:
                linear-gradient(rgba(0, 240, 255, .035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, .035) 1px, transparent 1px);
            background-size: 58px 58px;
            mask-image: linear-gradient(to bottom, black, transparent 88%);
        }

        h1,
        h2,
        h3,
        p {
            margin-top: 0;
        }

        h1,
        h2,
        h3 {
            color: var(--text);
            letter-spacing: -.035em;
            line-height: 1.12;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, background-color .25s ease, border-color .25s ease, transform .25s ease, box-shadow .25s ease;
        }

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

        button,
        input {
            font: inherit;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(0, 240, 255, .72);
            outline-offset: 4px;
        }

        .container {
            width: min(1180px, calc(100% - 40px));
            margin: 0 auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, .84);
            border-bottom: 1px solid rgba(0, 240, 255, .12);
            box-shadow: 0 10px 35px rgba(0, 0, 0, .22);
            backdrop-filter: blur(18px);
        }

        .navbar {
            min-height: 78px;
            padding: 12px 0;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            max-width: 260px;
            color: var(--text);
            font-size: 1.05rem;
            font-weight: 800;
            letter-spacing: -.02em;
            line-height: 1.12;
        }

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

        .brand-mark {
            display: inline-grid;
            place-items: center;
            width: 40px;
            height: 40px;
            flex: 0 0 40px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 13px;
            background: linear-gradient(145deg, rgba(0, 82, 255, .28), rgba(0, 240, 255, .08));
            box-shadow: inset 0 0 18px rgba(0, 240, 255, .12), 0 0 18px rgba(0, 82, 255, .16);
            font-size: 1.25rem;
        }

        .navbar-toggler {
            border: 1px solid var(--line-cyan);
            border-radius: 10px;
            padding: 8px 10px;
            color: var(--cyan);
            background: rgba(0, 240, 255, .06);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 .2rem rgba(0, 240, 255, .2);
        }

        .navbar-toggler-icon {
            filter: invert(82%) sepia(99%) saturate(1800%) hue-rotate(150deg) brightness(105%);
        }

        .nav-list {
            gap: 5px;
            margin-left: 32px;
        }

        .nav-link {
            position: relative;
            padding: 10px 14px !important;
            color: var(--muted-strong) !important;
            font-size: .93rem;
            font-weight: 600;
        }

        .nav-link::after {
            position: absolute;
            right: 14px;
            bottom: 3px;
            left: 14px;
            height: 2px;
            content: "";
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan);
            transform: scaleX(0);
            transition: transform .25s ease;
        }

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

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 13px;
            margin-left: auto;
        }

        .login-link {
            color: var(--muted-strong);
            font-size: .92rem;
            font-weight: 700;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 11px 20px;
            border: 1px solid transparent;
            border-radius: 12px;
            font-size: .92rem;
            font-weight: 800;
            line-height: 1;
            transition: transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease;
        }

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

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

        .btn-primary {
            color: #fff;
            border-color: rgba(126, 220, 255, .55);
            background: linear-gradient(110deg, var(--blue), #087bff 55%, var(--cyan));
            box-shadow: 0 0 23px rgba(0, 82, 255, .35);
        }

        .btn-primary:hover {
            color: #fff;
            box-shadow: 0 0 32px rgba(0, 240, 255, .45);
        }

        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-cyan);
            background: rgba(0, 240, 255, .045);
        }

        .btn-outline:hover {
            color: #fff;
            border-color: var(--cyan);
            background: rgba(0, 240, 255, .12);
            box-shadow: 0 0 24px rgba(0, 240, 255, .18);
        }

        .btn-dark {
            color: var(--muted-strong);
            border-color: var(--line);
            background: rgba(255, 255, 255, .04);
        }

        .btn-dark:hover {
            color: var(--text);
            border-color: var(--line-cyan);
        }

        .article-hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            padding: 88px 0 84px;
            isolation: isolate;
            background:
                linear-gradient(90deg, rgba(8, 9, 15, .98) 0%, rgba(8, 9, 15, .86) 42%, rgba(8, 9, 15, .46) 100%),
                url("/assets/images/backpic/back-2.jpg") center / cover no-repeat;
            border-bottom: 1px solid rgba(0, 240, 255, .14);
        }

        .article-hero::after {
            position: absolute;
            inset: auto 0 0;
            height: 130px;
            z-index: -1;
            content: "";
            background: linear-gradient(transparent, var(--bg));
        }

        .breadcrumb-line {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 9px;
            margin-bottom: 28px;
            color: var(--muted);
            font-size: .82rem;
            font-weight: 700;
        }

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

        .breadcrumb-separator {
            color: var(--cyan);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
            align-items: center;
            gap: 68px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            color: var(--cyan-soft);
            font-size: .76rem;
            font-weight: 800;
            letter-spacing: .13em;
            text-transform: uppercase;
        }

        .eyebrow::before {
            width: 28px;
            height: 2px;
            content: "";
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan);
        }

        .hero-copy h1 {
            max-width: 720px;
            margin-bottom: 22px;
            font-size: clamp(2.35rem, 5vw, 4.7rem);
            text-wrap: balance;
        }

        .hero-copy h1::first-letter {
            color: var(--cyan);
        }

        .hero-summary {
            max-width: 670px;
            margin-bottom: 30px;
            color: var(--muted-strong);
            font-size: 1.08rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 13px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            margin-top: 28px;
            color: var(--muted);
            font-size: .87rem;
        }

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

        .hero-meta strong {
            color: var(--muted-strong);
        }

        .media-stage {
            position: relative;
            min-height: 340px;
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, .36);
            border-radius: var(--radius-lg);
            background:
                linear-gradient(135deg, rgba(0, 82, 255, .18), rgba(0, 240, 255, .04)),
                url("/assets/images/coverpic/cover-2.jpg") center / cover no-repeat;
            box-shadow: var(--shadow), 0 0 35px rgba(0, 240, 255, .13);
        }

        .media-stage::before {
            position: absolute;
            inset: 0;
            content: "";
            background:
                linear-gradient(135deg, rgba(0, 240, 255, .17), transparent 42%),
                linear-gradient(0deg, rgba(8, 9, 15, .88), transparent 58%);
        }

        .media-grid {
            position: absolute;
            inset: 0;
            opacity: .3;
            background-image:
                linear-gradient(rgba(0, 240, 255, .16) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, .16) 1px, transparent 1px);
            background-size: 30px 30px;
        }

        .media-label {
            position: absolute;
            top: 22px;
            left: 22px;
            z-index: 2;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 11px;
            border: 1px solid rgba(118, 246, 181, .3);
            border-radius: 999px;
            color: var(--success);
            background: rgba(8, 9, 15, .68);
            font-size: .7rem;
            font-weight: 800;
            letter-spacing: .09em;
            text-transform: uppercase;
            backdrop-filter: blur(10px);
        }

        .live-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 12px var(--success);
            animation: pulseDot 1.7s infinite;
        }

        .media-bottom {
            position: absolute;
            right: 22px;
            bottom: 20px;
            left: 22px;
            z-index: 2;
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 16px;
        }

        .media-bottom strong {
            display: block;
            margin-bottom: 4px;
            font-size: 1.08rem;
        }

        .media-bottom small {
            color: var(--muted-strong);
        }

        .play-button {
            display: inline-grid;
            place-items: center;
            width: 70px;
            height: 70px;
            flex: 0 0 70px;
            padding-left: 5px;
            border: 1px solid rgba(255, 255, 255, .65);
            border-radius: 50%;
            color: #fff;
            background: linear-gradient(145deg, var(--blue), var(--cyan));
            box-shadow: 0 0 0 9px rgba(0, 240, 255, .11), 0 0 35px rgba(0, 240, 255, .5);
            font-size: 1.6rem;
            cursor: pointer;
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .play-button:hover {
            transform: scale(1.08);
            box-shadow: 0 0 0 12px rgba(0, 240, 255, .12), 0 0 48px rgba(0, 240, 255, .72);
        }

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

        .proof-strip {
            position: relative;
            z-index: 3;
            margin-top: -34px;
        }

        .proof-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, .84);
            box-shadow: var(--shadow);
            backdrop-filter: blur(16px);
        }

        .proof-item {
            min-height: 126px;
            padding: 25px 24px;
            border-right: 1px solid var(--line);
        }

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

        .proof-value {
            display: block;
            margin-bottom: 5px;
            color: var(--cyan);
            font-size: 1.35rem;
            font-weight: 850;
            letter-spacing: -.03em;
        }

        .proof-label {
            color: var(--muted);
            font-size: .88rem;
        }

        .section-heading {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 25px;
            margin-bottom: 34px;
        }

        .section-heading h2 {
            max-width: 680px;
            margin-bottom: 0;
            font-size: clamp(1.8rem, 3.3vw, 3rem);
        }

        .section-heading p {
            max-width: 430px;
            margin-bottom: 0;
            color: var(--muted);
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 300px;
            gap: 52px;
            align-items: start;
        }

        .article-content {
            min-width: 0;
            padding: clamp(24px, 4vw, 52px);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            background: linear-gradient(145deg, rgba(17, 26, 44, .76), rgba(13, 17, 30, .88));
            box-shadow: var(--shadow);
        }

        .article-kicker {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin-bottom: 23px;
        }

        .category-badge,
        .date-badge {
            display: inline-flex;
            align-items: center;
            min-height: 30px;
            padding: 5px 11px;
            border-radius: 999px;
            font-size: .74rem;
            font-weight: 800;
        }

        .category-badge {
            color: #d9ffff;
            border: 1px solid var(--line-cyan);
            background: rgba(0, 240, 255, .09);
        }

        .date-badge {
            color: var(--muted);
            border: 1px solid var(--line);
            background: rgba(255, 255, 255, .035);
        }

        .article-lead {
            margin-bottom: 31px;
            padding-bottom: 27px;
            border-bottom: 1px solid var(--line);
            color: var(--cyan-soft);
            font-size: 1.14rem;
            font-weight: 600;
            line-height: 1.68;
        }

        .rich-copy {
            color: var(--muted-strong);
            font-size: 1.03rem;
            line-height: 1.75;
        }

        .rich-copy p {
            margin-bottom: 1.35rem;
        }

        .rich-copy h2,
        .rich-copy h3 {
            margin: 2.35rem 0 1rem;
            color: var(--text);
        }

        .rich-copy h2 {
            padding-left: 15px;
            border-left: 3px solid var(--cyan);
            font-size: clamp(1.45rem, 2.5vw, 2rem);
        }

        .rich-copy h3 {
            color: var(--cyan-soft);
            font-size: 1.3rem;
        }

        .rich-copy ul,
        .rich-copy ol {
            margin: 1rem 0 1.45rem;
            padding-left: 1.35rem;
        }

        .rich-copy li {
            margin: .5rem 0;
            padding-left: .3rem;
        }

        .rich-copy li::marker {
            color: var(--cyan);
        }

        .rich-copy a {
            color: var(--cyan-soft);
            text-decoration: underline;
            text-decoration-color: rgba(0, 240, 255, .45);
            text-underline-offset: 3px;
        }

        .rich-copy a:hover {
            color: #fff;
            text-decoration-color: var(--cyan);
        }

        .rich-copy blockquote {
            margin: 1.8rem 0;
            padding: 19px 22px;
            border-left: 3px solid var(--blue-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--muted-strong);
            background: rgba(0, 82, 255, .1);
        }

        .rich-copy img {
            width: 100%;
            margin: 1.5rem 0;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
        }

        .article-aside {
            position: sticky;
            top: 106px;
        }

        .side-panel {
            padding: 25px;
            border: 1px solid var(--line-cyan);
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, .8);
            box-shadow: var(--glow);
        }

        .side-panel h2 {
            margin-bottom: 22px;
            font-size: 1.18rem;
        }

        .side-fact {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 15px;
            padding: 14px 0;
            border-bottom: 1px solid var(--line);
            font-size: .88rem;
        }

        .side-fact:last-of-type {
            border-bottom: 0;
        }

        .side-fact span {
            color: var(--muted);
        }

        .side-fact strong {
            color: var(--muted-strong);
            text-align: right;
        }

        .side-panel .btn {
            width: 100%;
            margin-top: 20px;
        }

        .aside-note {
            margin-top: 17px;
            padding: 20px;
            border-left: 2px solid var(--blue-light);
            color: var(--muted);
            background: rgba(0, 82, 255, .07);
            font-size: .88rem;
        }

        .aside-note strong {
            display: block;
            margin-bottom: 6px;
            color: var(--cyan-soft);
        }

        .empty-state {
            max-width: 700px;
            margin: 20px auto 10px;
            padding: 62px 28px;
            border: 1px solid var(--line-cyan);
            border-radius: var(--radius-lg);
            background: rgba(13, 17, 30, .78);
            box-shadow: var(--shadow);
            text-align: center;
        }

        .empty-icon {
            display: inline-grid;
            place-items: center;
            width: 60px;
            height: 60px;
            margin-bottom: 19px;
            border: 1px solid var(--line-cyan);
            border-radius: 18px;
            color: var(--cyan);
            background: rgba(0, 240, 255, .08);
            font-size: 1.5rem;
        }

        .empty-state h2 {
            margin-bottom: 12px;
            font-size: 1.8rem;
        }

        .empty-state p {
            margin-bottom: 25px;
            color: var(--muted);
        }

        .matrix-section {
            padding: 84px 0;
            background: linear-gradient(180deg, transparent, rgba(0, 82, 255, .055), transparent);
        }

        .matrix-grid {
            display: grid;
            grid-template-columns: 1.15fr .85fr .85fr;
            gap: 18px;
        }

        .matrix-item {
            position: relative;
            min-height: 225px;
            overflow: hidden;
            padding: 29px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, .72);
            transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
        }

        .matrix-item:first-child {
            background:
                linear-gradient(145deg, rgba(0, 82, 255, .25), rgba(13, 17, 30, .8) 70%),
                url("/assets/images/coverpic/cover-5.jpg") center / cover no-repeat;
        }

        .matrix-item::after {
            position: absolute;
            right: -28px;
            bottom: -40px;
            width: 120px;
            height: 120px;
            content: "";
            border: 1px solid rgba(0, 240, 255, .16);
            border-radius: 50%;
            box-shadow: 0 0 0 18px rgba(0, 240, 255, .03), 0 0 0 38px rgba(0, 240, 255, .025);
        }

        .matrix-item:hover {
            transform: translateY(-5px);
            border-color: var(--line-cyan);
            box-shadow: var(--glow);
        }

        .matrix-icon {
            display: inline-grid;
            place-items: center;
            width: 42px;
            height: 42px;
            margin-bottom: 22px;
            border: 1px solid var(--line-cyan);
            border-radius: 13px;
            color: var(--cyan);
            background: rgba(0, 240, 255, .08);
            font-weight: 900;
        }

        .matrix-item h3 {
            margin-bottom: 10px;
            font-size: 1.23rem;
        }

        .matrix-item p {
            max-width: 380px;
            margin-bottom: 0;
            color: var(--muted);
            font-size: .92rem;
        }

        .read-next {
            padding: 84px 0;
        }

        .next-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 22px;
        }

        .next-card {
            display: grid;
            grid-template-columns: 145px minmax(0, 1fr);
            min-height: 170px;
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, .73);
            transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
        }

        .next-card:hover {
            transform: translateY(-5px);
            border-color: var(--line-cyan);
            box-shadow: var(--glow);
        }

        .next-card-image {
            min-height: 170px;
            background-position: center;
            background-size: cover;
        }

        .next-card:nth-child(1) .next-card-image {
            background-image: linear-gradient(90deg, rgba(13, 17, 30, .05), rgba(13, 17, 30, .3)), url("/assets/images/coverpic/cover-1.jpg");
        }

        .next-card:nth-child(2) .next-card-image {
            background-image: linear-gradient(90deg, rgba(13, 17, 30, .05), rgba(13, 17, 30, .3)), url("/assets/images/coverpic/cover-6.jpg");
        }

        .next-card-content {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            justify-content: center;
            padding: 25px;
        }

        .next-card-content h3 {
            margin-bottom: 9px;
            font-size: 1.2rem;
        }

        .next-card-content p {
            margin-bottom: 16px;
            color: var(--muted);
            font-size: .9rem;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            color: var(--cyan-soft);
            font-size: .87rem;
            font-weight: 800;
        }

        .text-link:hover {
            gap: 11px;
            color: #fff;
        }

        .faq-section {
            padding: 85px 0;
            background: rgba(11, 16, 32, .52);
            border-top: 1px solid rgba(0, 240, 255, .08);
            border-bottom: 1px solid rgba(0, 240, 255, .08);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 80px;
            align-items: start;
        }

        .faq-intro h2 {
            margin-bottom: 17px;
            font-size: clamp(1.85rem, 3.2vw, 2.8rem);
        }

        .faq-intro p {
            margin-bottom: 0;
            color: var(--muted);
        }

        .accordion-item {
            margin-bottom: 12px;
            overflow: hidden;
            border: 1px solid var(--line) !important;
            border-radius: var(--radius-sm) !important;
            background: rgba(13, 17, 30, .68) !important;
        }

        .accordion-button {
            padding: 19px 22px;
            color: var(--muted-strong) !important;
            background: transparent !important;
            box-shadow: none !important;
            font-size: .98rem;
            font-weight: 750;
        }

        .accordion-button::after {
            filter: invert(90%) sepia(90%) saturate(1100%) hue-rotate(130deg);
        }

        .accordion-button:not(.collapsed) {
            color: var(--cyan-soft) !important;
        }

        .accordion-collapse {
            border-top: 1px solid var(--line);
        }

        .accordion-body {
            padding: 0 22px 21px;
            color: var(--muted);
            font-size: .93rem;
        }

        .cta-section {
            padding: 90px 0;
        }

        .cta-panel {
            position: relative;
            overflow: hidden;
            padding: clamp(36px, 7vw, 75px);
            border: 1px solid var(--line-cyan);
            border-radius: var(--radius-lg);
            background:
                radial-gradient(circle at 82% 20%, rgba(0, 240, 255, .19), transparent 19rem),
                linear-gradient(120deg, rgba(0, 82, 255, .26), rgba(13, 17, 30, .93) 65%);
            box-shadow: var(--shadow), var(--glow);
        }

        .cta-panel::before,
        .cta-panel::after {
            position: absolute;
            content: "";
            pointer-events: none;
            border: 1px solid rgba(0, 240, 255, .18);
            border-radius: 50%;
        }

        .cta-panel::before {
            top: -130px;
            right: -65px;
            width: 340px;
            height: 340px;
        }

        .cta-panel::after {
            right: 35px;
            bottom: -110px;
            width: 250px;
            height: 250px;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 720px;
        }

        .cta-content h2 {
            margin-bottom: 16px;
            font-size: clamp(1.95rem, 4vw, 3.25rem);
        }

        .cta-content p {
            max-width: 620px;
            margin-bottom: 27px;
            color: var(--muted-strong);
            font-size: 1.05rem;
        }

        .site-footer {
            padding: 68px 0 25px;
            border-top: 1px solid rgba(0, 240, 255, .13);
            background: #07080d;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr .7fr .9fr;
            gap: 70px;
            padding-bottom: 50px;
        }

        .footer-brand {
            margin-bottom: 18px;
        }

        .footer-about {
            max-width: 420px;
            margin-bottom: 21px;
            color: var(--muted);
            font-size: .91rem;
        }

        .trust-line {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .trust-badge {
            padding: 6px 10px;
            border: 1px solid var(--line);
            border-radius: 999px;
            color: var(--muted-strong);
            background: rgba(255, 255, 255, .035);
            font-size: .72rem;
            font-weight: 700;
        }

        .footer-title {
            margin-bottom: 18px;
            color: var(--text);
            font-size: .95rem;
            letter-spacing: .01em;
        }

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

        .footer-links a {
            color: var(--muted);
            font-size: .88rem;
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 14px;
            padding-top: 22px;
            border-top: 1px solid var(--line);
            color: #718096;
            font-size: .78rem;
        }

        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            display: inline-grid;
            place-items: center;
            width: 54px;
            height: 54px;
            border: 1px solid var(--cyan);
            border-radius: 16px;
            color: var(--cyan);
            background: rgba(8, 9, 15, .78);
            box-shadow: 0 0 15px rgba(0, 240, 255, .5), inset 0 0 16px rgba(0, 82, 255, .28);
            backdrop-filter: blur(12px);
            opacity: .72;
            transition: transform .25s ease, opacity .25s ease, box-shadow .25s ease;
        }

        .fab-support:hover {
            color: #fff;
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0, 240, 255, .8), inset 0 0 18px rgba(0, 82, 255, .45);
        }

        .fab-support svg {
            width: 25px;
            height: 25px;
            transition: transform .45s ease;
        }

        .fab-support:hover svg {
            transform: rotate(360deg);
        }

        .fab-notice {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 11px;
            height: 11px;
            border: 2px solid var(--bg);
            border-radius: 50%;
            background: var(--danger);
            box-shadow: 0 0 12px var(--danger);
            animation: pulseDot 1.5s infinite;
        }

        .demo-modal {
            position: fixed;
            inset: 0;
            z-index: 2000;
            display: grid;
            place-items: center;
            padding: 20px;
            background: rgba(3, 5, 12, .82);
            opacity: 0;
            pointer-events: none;
            transition: opacity .25s ease;
            backdrop-filter: blur(8px);
        }

        .demo-modal.is-visible {
            opacity: 1;
            pointer-events: auto;
        }

        .demo-window {
            position: relative;
            width: min(620px, 100%);
            padding: 34px;
            border: 1px solid var(--line-cyan);
            border-radius: var(--radius-lg);
            background:
                linear-gradient(145deg, rgba(17, 26, 44, .97), rgba(8, 9, 15, .98));
            box-shadow: 0 25px 100px rgba(0, 0, 0, .62), 0 0 35px rgba(0, 240, 255, .22);
            transform: translateY(14px);
            transition: transform .25s ease;
        }

        .demo-modal.is-visible .demo-window {
            transform: translateY(0);
        }

        .modal-close {
            position: absolute;
            top: 15px;
            right: 17px;
            width: 36px;
            height: 36px;
            border: 1px solid var(--line);
            border-radius: 10px;
            color: var(--muted-strong);
            background: rgba(255, 255, 255, .04);
            cursor: pointer;
        }

        .modal-close:hover {
            color: var(--cyan);
            border-color: var(--line-cyan);
        }

        .demo-window h2 {
            margin-bottom: 12px;
            font-size: 1.8rem;
        }

        .demo-window > p {
            margin-bottom: 25px;
            color: var(--muted);
        }

        .demo-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
        }

        .demo-step {
            padding: 17px 14px;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, .045);
        }

        .demo-step strong {
            display: block;
            margin-bottom: 6px;
            color: var(--cyan);
            font-size: 1.2rem;
        }

        .demo-step span {
            display: block;
            color: var(--muted-strong);
            font-size: .82rem;
            line-height: 1.45;
        }

        @keyframes pulseDot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: .42;
                transform: scale(.72);
            }
        }

        @media (max-width: 1024px) {
            .hero-grid {
                gap: 38px;
            }

            .article-layout {
                gap: 30px;
            }

            .faq-layout {
                gap: 42px;
            }

            .footer-grid {
                gap: 35px;
            }
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                margin-top: 15px;
                padding: 16px 0 5px;
                border-top: 1px solid var(--line);
            }

            .nav-list {
                margin-left: 0;
            }

            .nav-actions {
                justify-content: flex-start;
                margin-top: 13px;
                padding-top: 15px;
                border-top: 1px solid var(--line);
            }

            .hero-grid,
            .article-layout,
            .faq-layout {
                grid-template-columns: 1fr;
            }

            .hero-copy {
                max-width: 790px;
            }

            .media-stage {
                min-height: 300px;
            }

            .article-aside {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .aside-note {
                margin-top: 0;
            }

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

            .matrix-item:first-child {
                grid-column: span 2;
            }

            .faq-intro {
                max-width: 650px;
            }

            .footer-grid {
                grid-template-columns: 1.3fr 1fr 1fr;
            }
        }

        @media (max-width: 767px) {
            .container {
                width: min(100% - 30px, 680px);
            }

            .navbar {
                min-height: 70px;
            }

            .brand {
                max-width: 215px;
                font-size: .96rem;
            }

            .article-hero {
                min-height: auto;
                padding: 58px 0 72px;
            }

            .hero-copy h1 {
                font-size: clamp(2.1rem, 9vw, 3.7rem);
            }

            .hero-summary {
                font-size: 1rem;
            }

            .proof-strip {
                margin-top: -25px;
            }

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

            .proof-item:nth-child(2) {
                border-right: 0;
            }

            .proof-item:nth-child(-n+2) {
                border-bottom: 1px solid var(--line);
            }

            .proof-item {
                min-height: 105px;
                padding: 20px 17px;
            }

            .section-space,
            .matrix-section,
            .read-next,
            .faq-section,
            .cta-section {
                padding: 65px 0;
            }

            .section-heading {
                display: block;
                margin-bottom: 25px;
            }

            .section-heading h2 {
                margin-bottom: 13px;
            }

            .article-content {
                padding: 25px 21px;
            }

            .article-aside {
                display: block;
            }

            .aside-note {
                margin-top: 15px;
            }

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

            .matrix-item:first-child {
                grid-column: auto;
            }

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

            .faq-layout {
                gap: 30px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 35px 25px;
            }

            .footer-grid > div:first-child {
                grid-column: span 2;
            }

            .footer-bottom {
                display: block;
            }

            .footer-bottom span {
                display: block;
                margin-bottom: 7px;
            }
        }

        @media (max-width: 520px) {
            .container {
                width: calc(100% - 28px);
            }

            .brand-mark {
                width: 36px;
                height: 36px;
                flex-basis: 36px;
            }

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

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

            .media-stage {
                min-height: 245px;
                border-radius: var(--radius-md);
            }

            .media-bottom {
                right: 15px;
                bottom: 15px;
                left: 15px;
            }

            .media-label {
                top: 15px;
                left: 15px;
                font-size: .63rem;
            }

            .play-button {
                width: 58px;
                height: 58px;
                flex-basis: 58px;
            }

            .media-bottom strong {
                font-size: .95rem;
            }

            .media-bottom small {
                font-size: .72rem;
            }

            .proof-value {
                font-size: 1.08rem;
            }

            .proof-label {
                font-size: .78rem;
            }

            .next-card {
                grid-template-columns: 105px minmax(0, 1fr);
            }

            .next-card-image {
                min-height: 160px;
            }

            .next-card-content {
                padding: 18px 16px;
            }

            .next-card-content h3 {
                font-size: 1rem;
            }

            .next-card-content p {
                font-size: .8rem;
            }

            .demo-window {
                padding: 28px 20px 22px;
            }

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

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

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

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

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

/* roulang page: category2 */
:root {
            --bg: #08090f;
            --bg-soft: #0b1020;
            --panel: rgba(13, 17, 30, 0.82);
            --panel-solid: #0d111e;
            --panel-light: #111a2c;
            --blue: #0052ff;
            --blue-light: #3c7cff;
            --cyan: #00f0ff;
            --cyan-soft: #8cefff;
            --text: #f7fbff;
            --muted: #9aa8be;
            --muted-strong: #cbd5e1;
            --line: rgba(133, 164, 216, 0.18);
            --line-cyan: rgba(0, 240, 255, 0.32);
            --success: #76f6b5;
            --danger: #ff557c;
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 28px;
            --shadow: 0 20px 60px rgba(0, 0, 0, .35);
            --glow: 0 0 28px rgba(0, 240, 255, .18);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            min-width: 320px;
            color: var(--text);
            background:
                radial-gradient(circle at 8% 5%, rgba(0, 82, 255, .14), transparent 28rem),
                radial-gradient(circle at 90% 30%, rgba(0, 240, 255, .08), transparent 24rem),
                var(--bg);
            font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
            font-size: 16px;
            line-height: 1.62;
            overflow-x: hidden;
        }

        body::before {
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            content: "";
            opacity: .23;
            background-image:
                linear-gradient(rgba(67, 111, 181, .06) 1px, transparent 1px),
                linear-gradient(90deg, rgba(67, 111, 181, .06) 1px, transparent 1px);
            background-size: 54px 54px;
            mask-image: linear-gradient(to bottom, #000, transparent 88%);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, background-color .25s ease, border-color .25s ease, transform .25s ease, box-shadow .25s ease;
        }

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

        button,
        input {
            font: inherit;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(0, 240, 255, .72);
            outline-offset: 4px;
        }

        .container {
            width: min(1180px, calc(100% - 40px));
            margin: 0 auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, .84);
            border-bottom: 1px solid rgba(0, 240, 255, .12);
            box-shadow: 0 10px 35px rgba(0, 0, 0, .22);
            backdrop-filter: blur(18px);
        }

        .navbar {
            min-height: 78px;
            padding: 12px 0;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            color: var(--text);
            font-size: 1.05rem;
            font-weight: 800;
            letter-spacing: -.02em;
            line-height: 1.12;
            max-width: 260px;
        }

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

        .brand-mark {
            display: inline-grid;
            place-items: center;
            width: 40px;
            height: 40px;
            flex: 0 0 40px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 13px;
            background: linear-gradient(145deg, rgba(0, 82, 255, .28), rgba(0, 240, 255, .08));
            box-shadow: inset 0 0 18px rgba(0, 240, 255, .12), 0 0 18px rgba(0, 82, 255, .16);
            font-size: 1.25rem;
        }

        .navbar-toggler {
            border: 1px solid var(--line-cyan);
            border-radius: 10px;
            padding: 8px 10px;
            color: var(--cyan);
            background: rgba(0, 240, 255, .06);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 .2rem rgba(0, 240, 255, .2);
        }

        .navbar-toggler-icon {
            filter: invert(82%) sepia(99%) saturate(1800%) hue-rotate(150deg) brightness(105%);
        }

        .nav-list {
            gap: 5px;
            margin-left: 32px;
        }

        .nav-link {
            position: relative;
            padding: 10px 14px !important;
            color: var(--muted-strong) !important;
            font-size: .93rem;
            font-weight: 600;
        }

        .nav-link::after {
            position: absolute;
            right: 14px;
            bottom: 3px;
            left: 14px;
            height: 2px;
            content: "";
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan);
            transform: scaleX(0);
            transition: transform .25s ease;
        }

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

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 13px;
            margin-left: auto;
        }

        .login-link {
            color: var(--muted-strong);
            font-size: .92rem;
            font-weight: 700;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 11px 20px;
            border: 1px solid transparent;
            border-radius: 12px;
            font-size: .92rem;
            font-weight: 800;
            line-height: 1;
            transition: transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease;
        }

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

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

        .btn-primary {
            color: #fff;
            border-color: rgba(126, 220, 255, .55);
            background: linear-gradient(110deg, var(--blue), #087bff 55%, var(--cyan));
            box-shadow: 0 0 23px rgba(0, 82, 255, .35);
        }

        .btn-primary:hover {
            color: #fff;
            box-shadow: 0 0 32px rgba(0, 240, 255, .45);
        }

        .btn-outline {
            color: var(--cyan-soft);
            border-color: var(--line-cyan);
            background: rgba(0, 240, 255, .045);
        }

        .btn-outline:hover {
            color: #fff;
            border-color: var(--cyan);
            background: rgba(0, 240, 255, .12);
            box-shadow: 0 0 24px rgba(0, 240, 255, .18);
        }

        .btn-dark {
            color: var(--muted-strong);
            border-color: var(--line);
            background: rgba(255, 255, 255, .04);
        }

        .btn-dark:hover {
            color: var(--text);
            border-color: var(--line-cyan);
        }

        .page-hero {
            position: relative;
            min-height: 625px;
            display: flex;
            align-items: center;
            overflow: hidden;
            isolation: isolate;
            background:
                linear-gradient(90deg, rgba(8, 9, 15, .96) 4%, rgba(8, 9, 15, .78) 43%, rgba(8, 9, 15, .36) 100%),
                url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
        }

        .page-hero::before {
            position: absolute;
            inset: 0;
            z-index: -1;
            content: "";
            background: linear-gradient(135deg, rgba(0, 82, 255, .23), transparent 42%, rgba(0, 240, 255, .12));
        }

        .page-hero::after {
            position: absolute;
            right: -100px;
            bottom: -180px;
            z-index: -1;
            width: 520px;
            height: 520px;
            content: "";
            border: 1px solid rgba(0, 240, 255, .18);
            border-radius: 50%;
            box-shadow: 0 0 0 30px rgba(0, 240, 255, .03), 0 0 0 80px rgba(0, 240, 255, .025);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 78px 0 64px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 20px;
            color: var(--cyan-soft);
            font-size: .74rem;
            font-weight: 800;
            letter-spacing: .14em;
            text-transform: uppercase;
        }

        .eyebrow::before {
            width: 28px;
            height: 2px;
            content: "";
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan);
        }

        .hero-copy {
            max-width: 680px;
        }

        h1,
        h2,
        h3,
        p {
            margin-top: 0;
        }

        h1,
        h2,
        h3 {
            color: var(--text);
            letter-spacing: -.045em;
        }

        h1 {
            max-width: 740px;
            margin-bottom: 23px;
            font-size: clamp(2.5rem, 5vw, 4.8rem);
            font-weight: 850;
            line-height: 1.02;
        }

        h2 {
            margin-bottom: 15px;
            font-size: clamp(1.9rem, 3.2vw, 3rem);
            font-weight: 800;
            line-height: 1.08;
        }

        h3 {
            margin-bottom: 9px;
            font-size: 1.2rem;
            font-weight: 750;
            line-height: 1.25;
        }

        .hero-copy > p {
            max-width: 620px;
            margin-bottom: 30px;
            color: var(--muted-strong);
            font-size: 1.08rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 13px;
        }

        .hero-console {
            position: relative;
            min-height: 365px;
            padding: 25px;
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, .3);
            border-radius: var(--radius-lg);
            background: linear-gradient(145deg, rgba(12, 27, 56, .8), rgba(7, 12, 26, .68));
            box-shadow: var(--shadow), var(--glow);
            backdrop-filter: blur(16px);
        }

        .hero-console::before {
            position: absolute;
            top: -80px;
            right: -70px;
            width: 210px;
            height: 210px;
            content: "";
            border: 1px solid rgba(0, 240, 255, .26);
            border-radius: 50%;
            box-shadow: 0 0 0 17px rgba(0, 240, 255, .04), 0 0 0 42px rgba(0, 240, 255, .025);
        }

        .console-top {
            position: relative;
            z-index: 1;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 27px;
            color: var(--muted);
            font-size: .78rem;
            font-weight: 800;
            letter-spacing: .08em;
            text-transform: uppercase;
        }

        .live-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            margin-right: 6px;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 13px var(--success);
            animation: blink 1.8s infinite;
        }

        .phone-stage {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 22px;
            min-height: 160px;
            padding: 20px;
            border: 1px solid rgba(133, 164, 216, .17);
            border-radius: 18px;
            background: rgba(255, 255, 255, .035);
        }

        .mini-phone {
            position: relative;
            display: grid;
            place-items: center;
            width: 83px;
            height: 142px;
            flex: 0 0 83px;
            border: 4px solid #46516b;
            border-radius: 18px;
            background: linear-gradient(150deg, #0f1f3b, #09101f);
            box-shadow: inset 0 0 24px rgba(0, 240, 255, .12), 0 12px 24px rgba(0, 0, 0, .35);
        }

        .mini-phone::before {
            position: absolute;
            top: 8px;
            width: 25px;
            height: 3px;
            content: "";
            border-radius: 8px;
            background: #59657c;
        }

        .mini-cards {
            display: grid;
            grid-template-columns: repeat(2, 25px);
            gap: 5px;
            margin-top: 10px;
        }

        .mini-card {
            display: grid;
            place-items: center;
            width: 25px;
            height: 34px;
            color: var(--cyan);
            border: 1px solid rgba(0, 240, 255, .42);
            border-radius: 4px;
            background: rgba(0, 82, 255, .32);
            font-size: .58rem;
            font-weight: 800;
        }

        .mini-card:nth-child(2),
        .mini-card:nth-child(4) {
            color: #ff7eae;
            border-color: rgba(255, 126, 174, .4);
        }

        .stage-copy strong {
            display: block;
            margin-bottom: 7px;
            font-size: 1.1rem;
        }

        .stage-copy span {
            display: block;
            color: var(--muted);
            font-size: .88rem;
        }

        .console-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            margin-top: 14px;
        }

        .console-metric {
            padding: 13px 10px;
            border-left: 2px solid var(--cyan);
            background: rgba(0, 0, 0, .18);
        }

        .console-metric strong {
            display: block;
            color: var(--cyan);
            font-size: 1.25rem;
            line-height: 1;
        }

        .console-metric span {
            display: block;
            margin-top: 7px;
            color: var(--muted);
            font-size: .7rem;
        }

        .countdown-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            margin-top: 28px;
            padding: 12px 17px;
            border: 1px solid rgba(0, 240, 255, .27);
            border-radius: 12px;
            background: rgba(5, 12, 28, .75);
            color: var(--muted-strong);
            font-size: .84rem;
        }

        .countdown-bar strong {
            color: var(--cyan);
            font-variant-numeric: tabular-nums;
            letter-spacing: .08em;
        }

        .section {
            padding: 105px 0;
        }

        .section-sm {
            padding: 72px 0;
        }

        .section-heading {
            max-width: 690px;
            margin-bottom: 45px;
        }

        .section-heading p {
            max-width: 620px;
            margin-bottom: 0;
            color: var(--muted);
        }

        .section-heading.split {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 30px;
            max-width: none;
        }

        .section-heading.split > div:first-child {
            max-width: 650px;
        }

        .kicker {
            margin-bottom: 12px;
            color: var(--cyan);
            font-size: .76rem;
            font-weight: 800;
            letter-spacing: .16em;
            text-transform: uppercase;
        }

        .intro-section {
            position: relative;
        }

        .intro-media {
            position: relative;
            min-height: 430px;
            overflow: hidden;
            border-radius: var(--radius-lg);
            background: var(--panel-solid);
            box-shadow: var(--shadow);
        }

        .intro-media img {
            width: 100%;
            height: 100%;
            min-height: 430px;
            object-fit: cover;
            opacity: .83;
        }

        .intro-media::after {
            position: absolute;
            inset: 0;
            content: "";
            background: linear-gradient(0deg, rgba(8, 9, 15, .9), transparent 65%);
        }

        .media-caption {
            position: absolute;
            right: 25px;
            bottom: 22px;
            left: 25px;
            z-index: 1;
            color: var(--muted-strong);
            font-size: .86rem;
        }

        .media-caption strong {
            display: block;
            margin-bottom: 4px;
            color: var(--text);
            font-size: 1rem;
        }

        .intro-content {
            padding: 15px 0 15px 28px;
        }

        .intro-content p {
            color: var(--muted);
        }

        .check-list {
            display: grid;
            gap: 13px;
            margin: 26px 0 30px;
            padding: 0;
            list-style: none;
        }

        .check-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--muted-strong);
        }

        .check-list li::before {
            display: grid;
            place-items: center;
            width: 23px;
            height: 23px;
            flex: 0 0 23px;
            margin-top: 2px;
            content: "✓";
            color: var(--success);
            border: 1px solid rgba(118, 246, 181, .35);
            border-radius: 50%;
            background: rgba(118, 246, 181, .08);
            font-size: .76rem;
            font-weight: 800;
        }

        .dashboard-section {
            background: linear-gradient(180deg, rgba(11, 16, 32, .65), rgba(8, 9, 15, .2));
            border-top: 1px solid rgba(133, 164, 216, .08);
            border-bottom: 1px solid rgba(133, 164, 216, .08);
        }

        .metric-board {
            display: grid;
            grid-template-columns: 1.15fr .85fr;
            gap: 22px;
        }

        .metric-panel,
        .feature-matrix {
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: var(--panel);
            box-shadow: 0 15px 45px rgba(0, 0, 0, .2);
            backdrop-filter: blur(14px);
        }

        .metric-panel {
            padding: 28px;
        }

        .panel-label {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 28px;
            color: var(--muted);
            font-size: .76rem;
            font-weight: 800;
            letter-spacing: .11em;
            text-transform: uppercase;
        }

        .panel-label span:last-child {
            color: var(--success);
        }

        .big-metric {
            display: flex;
            align-items: end;
            gap: 12px;
            margin-bottom: 25px;
        }

        .big-metric strong {
            color: var(--cyan);
            font-size: clamp(3rem, 6vw, 5rem);
            font-weight: 850;
            letter-spacing: -.08em;
            line-height: .9;
            text-shadow: 0 0 28px rgba(0, 240, 255, .28);
        }

        .big-metric span {
            max-width: 110px;
            padding-bottom: 5px;
            color: var(--muted);
            font-size: .82rem;
            line-height: 1.35;
        }

        .meter {
            height: 9px;
            overflow: hidden;
            border-radius: 10px;
            background: rgba(255, 255, 255, .08);
        }

        .meter span {
            display: block;
            width: 92%;
            height: 100%;
            border-radius: inherit;
            background: linear-gradient(90deg, var(--blue), var(--cyan));
            box-shadow: 0 0 18px rgba(0, 240, 255, .5);
        }

        .meter-note {
            display: flex;
            justify-content: space-between;
            margin-top: 10px;
            color: var(--muted);
            font-size: .78rem;
        }

        .mini-stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 13px;
            margin-top: 28px;
        }

        .mini-stat {
            padding: 15px;
            border: 1px solid rgba(133, 164, 216, .13);
            border-radius: 14px;
            background: rgba(255, 255, 255, .025);
        }

        .mini-stat strong {
            display: block;
            margin-bottom: 4px;
            color: var(--text);
            font-size: 1.1rem;
        }

        .mini-stat span {
            color: var(--muted);
            font-size: .76rem;
        }

        .feature-matrix {
            overflow: hidden;
        }

        .matrix-header {
            display: grid;
            grid-template-columns: 1fr 105px 105px;
            padding: 19px 23px;
            color: var(--muted);
            border-bottom: 1px solid var(--line);
            font-size: .72rem;
            font-weight: 800;
            letter-spacing: .1em;
            text-transform: uppercase;
        }

        .matrix-row {
            display: grid;
            grid-template-columns: 1fr 105px 105px;
            align-items: center;
            min-height: 71px;
            padding: 13px 23px;
            border-bottom: 1px solid rgba(133, 164, 216, .1);
        }

        .matrix-row:last-child {
            border-bottom: 0;
        }

        .matrix-row:hover {
            background: rgba(0, 240, 255, .045);
        }

        .feature-name {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--muted-strong);
            font-weight: 700;
        }

        .feature-icon {
            display: grid;
            place-items: center;
            width: 32px;
            height: 32px;
            flex: 0 0 32px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 9px;
            background: rgba(0, 240, 255, .07);
            font-size: .85rem;
        }

        .matrix-row em {
            color: var(--success);
            font-size: .8rem;
            font-style: normal;
            font-weight: 700;
        }

        .experience-section {
            position: relative;
        }

        .experience-layout {
            display: grid;
            grid-template-columns: .82fr 1.18fr;
            gap: 70px;
            align-items: center;
        }

        .experience-copy {
            max-width: 450px;
        }

        .experience-copy p {
            color: var(--muted);
        }

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

        .comparison-item {
            position: relative;
            min-height: 235px;
            padding: 24px;
            overflow: hidden;
            border-radius: 18px;
            background: var(--panel-light);
        }

        .comparison-item:first-child {
            border: 1px solid rgba(133, 164, 216, .13);
        }

        .comparison-item:last-child {
            border: 1px solid rgba(0, 240, 255, .32);
            background: linear-gradient(145deg, rgba(0, 82, 255, .2), rgba(10, 20, 39, .9));
            box-shadow: var(--glow);
        }

        .comparison-item::before {
            position: absolute;
            right: -30px;
            bottom: -42px;
            width: 150px;
            height: 150px;
            content: "";
            border: 1px solid rgba(0, 240, 255, .13);
            border-radius: 50%;
        }

        .comparison-label {
            display: inline-block;
            margin-bottom: 40px;
            color: var(--muted);
            font-size: .72rem;
            font-weight: 800;
            letter-spacing: .12em;
            text-transform: uppercase;
        }

        .comparison-item:last-child .comparison-label {
            color: var(--cyan);
        }

        .comparison-item strong {
            display: block;
            max-width: 190px;
            color: var(--text);
            font-size: 1.18rem;
            line-height: 1.25;
        }

        .comparison-item p {
            position: relative;
            z-index: 1;
            margin: 9px 0 0;
            color: var(--muted);
            font-size: .86rem;
        }

        .steps-section {
            padding-top: 80px;
            background: rgba(5, 10, 22, .55);
        }

        .steps-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0;
            border-top: 1px solid var(--line);
        }

        .step {
            position: relative;
            padding: 30px 28px 20px 0;
            border-right: 1px solid var(--line);
        }

        .step:not(:first-child) {
            padding-left: 28px;
        }

        .step:last-child {
            border-right: 0;
        }

        .step-number {
            display: inline-grid;
            place-items: center;
            width: 38px;
            height: 38px;
            margin-bottom: 22px;
            color: var(--cyan);
            border: 1px solid var(--line-cyan);
            border-radius: 50%;
            background: rgba(0, 240, 255, .06);
            font-size: .86rem;
            font-weight: 800;
        }

        .step p {
            margin: 0;
            color: var(--muted);
            font-size: .92rem;
        }

        .faq-section {
            padding-bottom: 90px;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 75px;
            align-items: start;
        }

        .faq-intro p {
            color: var(--muted);
        }

        .faq-intro .btn {
            margin-top: 17px;
        }

        .accordion {
            --bs-accordion-bg: transparent;
            --bs-accordion-color: var(--muted-strong);
            --bs-accordion-border-color: var(--line);
            --bs-accordion-btn-color: var(--text);
            --bs-accordion-btn-bg: rgba(13, 17, 30, .72);
            --bs-accordion-active-color: var(--cyan);
            --bs-accordion-active-bg: rgba(0, 240, 255, .06);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 .2rem rgba(0, 240, 255, .14);
        }

        .accordion-item {
            margin-bottom: 11px;
            overflow: hidden;
            border: 1px solid var(--line) !important;
            border-radius: 14px !important;
            background: rgba(13, 17, 30, .72);
        }

        .accordion-button {
            padding: 19px 21px;
            font-weight: 750;
        }

        .accordion-button::after {
            filter: invert(83%) sepia(70%) saturate(1028%) hue-rotate(145deg);
        }

        .accordion-body {
            padding: 0 21px 20px;
            color: var(--muted);
            font-size: .94rem;
        }

        .cta-section {
            padding: 85px 0;
            text-align: center;
            background:
                linear-gradient(110deg, rgba(0, 82, 255, .65), rgba(0, 240, 255, .18)),
                url("/assets/images/backpic/back-1.jpg") center/cover no-repeat;
        }

        .cta-box {
            max-width: 790px;
            margin: 0 auto;
        }

        .cta-section h2 {
            margin-bottom: 17px;
        }

        .cta-section p {
            margin-bottom: 28px;
            color: rgba(247, 251, 255, .78);
        }

        .cta-section .btn-dark {
            color: #fff;
            border-color: rgba(255, 255, 255, .36);
            background: rgba(0, 0, 0, .23);
        }

        .cta-section .btn-dark:hover {
            border-color: #fff;
            background: rgba(0, 0, 0, .42);
        }

        .site-footer {
            padding: 70px 0 28px;
            border-top: 1px solid rgba(0, 240, 255, .16);
            background: #07080d;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.45fr .7fr .8fr;
            gap: 60px;
            padding-bottom: 48px;
        }

        .footer-brand {
            margin-bottom: 19px;
        }

        .footer-about {
            max-width: 390px;
            margin-bottom: 22px;
            color: var(--muted);
            font-size: .9rem;
        }

        .trust-line {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .trust-badge {
            padding: 7px 10px;
            color: var(--cyan-soft);
            border: 1px solid rgba(0, 240, 255, .2);
            border-radius: 8px;
            background: rgba(0, 240, 255, .05);
            font-size: .72rem;
            font-weight: 700;
        }

        .footer-title {
            margin: 5px 0 18px;
            color: var(--text);
            font-size: .9rem;
            font-weight: 800;
            letter-spacing: .05em;
            text-transform: uppercase;
        }

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

        .footer-links a {
            color: var(--muted);
            font-size: .88rem;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 23px;
            color: #718099;
            border-top: 1px solid rgba(133, 164, 216, .12);
            font-size: .78rem;
        }

        .support-fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-width: 50px;
            min-height: 50px;
            padding: 9px 14px;
            color: var(--cyan);
            border: 1px solid transparent;
            border-radius: 16px;
            background:
                linear-gradient(#080d1a, #080d1a) padding-box,
                linear-gradient(135deg, var(--cyan), var(--blue), #78ffdc) border-box;
            box-shadow: 0 0 20px rgba(0, 240, 255, .32);
            opacity: .78;
            backdrop-filter: blur(12px);
            animation: floatButton 3.5s ease-in-out infinite;
        }

        .support-fab::after {
            position: absolute;
            top: -4px;
            right: -3px;
            width: 9px;
            height: 9px;
            content: "";
            border-radius: 50%;
            background: var(--danger);
            box-shadow: 0 0 10px var(--danger);
            animation: blink 1.5s infinite;
        }

        .support-fab:hover {
            color: #fff;
            opacity: 1;
            box-shadow: 0 0 32px rgba(0, 240, 255, .62);
            transform: scale(1.07);
        }

        .support-fab:hover .fab-icon {
            transform: rotate(360deg);
        }

        .fab-icon {
            display: grid;
            place-items: center;
            width: 24px;
            height: 24px;
            color: var(--cyan);
            font-size: 1.05rem;
            transition: transform .55s ease;
        }

        .fab-text {
            font-size: .78rem;
            font-weight: 800;
        }

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

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: .38; }
        }

        @media (max-width: 1199px) {
            .hero-content {
                padding-top: 68px;
            }

            .experience-layout {
                gap: 45px;
            }
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                margin-top: 15px;
                padding: 13px 0 5px;
                border-top: 1px solid var(--line);
            }

            .nav-list {
                margin-left: 0;
            }

            .nav-actions {
                justify-content: flex-start;
                margin-top: 13px;
                margin-left: 0;
                padding-bottom: 9px;
            }

            .page-hero {
                min-height: auto;
                background-position: 62% center;
            }

            .hero-content {
                padding: 75px 0 55px;
            }

            .hero-console {
                max-width: 650px;
                margin: 36px auto 0;
            }

            .intro-content {
                padding: 35px 0 0;
            }

            .metric-board,
            .experience-layout,
            .faq-layout {
                grid-template-columns: 1fr;
                gap: 35px;
            }

            .experience-copy,
            .faq-intro {
                max-width: 680px;
            }

            .footer-grid {
                gap: 35px;
            }
        }

        @media (max-width: 767px) {
            .container {
                width: min(100% - 30px, 620px);
            }

            .navbar {
                min-height: 70px;
            }

            .brand {
                font-size: .96rem;
            }

            .brand-mark {
                width: 36px;
                height: 36px;
                flex-basis: 36px;
            }

            h1 {
                font-size: clamp(2.35rem, 10vw, 3.8rem);
            }

            .section {
                padding: 75px 0;
            }

            .section-sm {
                padding: 55px 0;
            }

            .section-heading.split {
                display: block;
            }

            .section-heading.split .btn {
                margin-top: 22px;
            }

            .phone-stage {
                align-items: flex-start;
                padding: 17px;
            }

            .console-metrics {
                gap: 7px;
            }

            .console-metric {
                padding: 11px 8px;
            }

            .matrix-header,
            .matrix-row {
                grid-template-columns: 1fr 78px 78px;
            }

            .matrix-header {
                padding: 17px 15px;
            }

            .matrix-row {
                padding: 12px 15px;
            }

            .feature-name {
                gap: 8px;
                font-size: .88rem;
            }

            .feature-icon {
                width: 29px;
                height: 29px;
                flex-basis: 29px;
            }

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

            .step,
            .step:not(:first-child) {
                padding: 25px 0;
                border-right: 0;
                border-bottom: 1px solid var(--line);
            }

            .step:last-child {
                border-bottom: 0;
            }

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

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

            .footer-bottom {
                display: block;
            }

            .footer-bottom span {
                display: block;
                margin-bottom: 7px;
            }
        }

        @media (max-width: 520px) {
            .hero-content {
                padding: 58px 0 42px;
            }

            .hero-copy > p {
                font-size: .98rem;
            }

            .hero-actions {
                display: grid;
                grid-template-columns: 1fr;
            }

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

            .hero-console {
                min-height: auto;
                padding: 17px;
            }

            .phone-stage {
                gap: 13px;
            }

            .mini-phone {
                width: 67px;
                height: 119px;
                flex-basis: 67px;
            }

            .mini-cards {
                grid-template-columns: repeat(2, 20px);
            }

            .mini-card {
                width: 20px;
                height: 28px;
                font-size: .5rem;
            }

            .stage-copy strong {
                font-size: .98rem;
            }

            .stage-copy span {
                font-size: .76rem;
            }

            .countdown-bar {
                align-items: flex-start;
                flex-direction: column;
                gap: 3px;
                margin-top: 17px;
            }

            .intro-media,
            .intro-media img {
                min-height: 300px;
            }

            .metric-panel {
                padding: 20px;
            }

            .matrix-header,
            .matrix-row {
                grid-template-columns: minmax(0, 1fr) 58px 58px;
            }

            .matrix-header {
                font-size: .61rem;
            }

            .matrix-row {
                min-height: 66px;
            }

            .feature-name {
                font-size: .77rem;
            }

            .matrix-row em {
                font-size: .67rem;
            }

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

            .comparison-item {
                min-height: 190px;
            }

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

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

            .support-fab {
                bottom: 79px;
            }

            .fab-text {
                display: none;
            }

            .support-fab {
                width: 52px;
                justify-content: center;
                padding: 10px;
                border-radius: 50%;
            }
        }