/* roulang page: index */
:root {
            --bg: #050d19;
            --bg-deep: #030914;
            --surface: rgba(12, 29, 52, .82);
            --surface-solid: #0c1d34;
            --surface-soft: rgba(18, 43, 74, .58);
            --surface-hover: rgba(24, 58, 96, .72);
            --primary: #338bff;
            --primary-deep: #1c57d7;
            --cyan: #48d7ff;
            --violet: #8e7dff;
            --text: #eef7ff;
            --text-soft: #c4d4e7;
            --muted: #8298b2;
            --line: rgba(139, 196, 255, .16);
            --line-bright: rgba(72, 215, 255, .44);
            --success: #54e6ae;
            --warning: #ffc969;
            --danger: #ff7c98;
            --radius-xs: 8px;
            --radius-sm: 12px;
            --radius: 18px;
            --radius-lg: 26px;
            --shadow: 0 24px 70px rgba(0, 5, 15, .42);
            --glow: 0 0 0 1px rgba(72, 215, 255, .12), 0 14px 40px rgba(28, 111, 255, .22);
            --container: 1240px;
            --section: clamp(76px, 9vw, 128px);
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 120px;
        }

        body {
            margin: 0;
            min-width: 320px;
            color: var(--text);
            background:
                radial-gradient(circle at 12% 5%, rgba(42, 99, 203, .19), transparent 30rem),
                radial-gradient(circle at 86% 18%, rgba(56, 205, 240, .10), transparent 27rem),
                linear-gradient(rgba(63, 113, 170, .035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(63, 113, 170, .035) 1px, transparent 1px),
                var(--bg);
            background-size: auto, auto, 48px 48px, 48px 48px, auto;
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.72;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: .2;
            background-image: radial-gradient(rgba(255,255,255,.14) .55px, transparent .55px);
            background-size: 8px 8px;
            mask-image: linear-gradient(to bottom, black, transparent 75%);
        }

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

        h1, h2, h3 {
            line-height: 1.22;
            letter-spacing: -.025em;
        }

        h1 {
            margin-bottom: 22px;
            font-size: clamp(2.25rem, 5.7vw, 5rem);
        }

        h2 {
            margin-bottom: 16px;
            font-size: clamp(1.8rem, 3.4vw, 3.15rem);
        }

        h3 {
            margin-bottom: 10px;
            font-size: clamp(1.08rem, 1.5vw, 1.3rem);
        }

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

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

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

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

        button, a, input, select, textarea, summary {
            -webkit-tap-highlight-color: transparent;
        }

        :focus-visible {
            outline: 3px solid rgba(72, 215, 255, .78);
            outline-offset: 3px;
        }

        ::selection {
            color: #fff;
            background: rgba(48, 130, 255, .7);
        }

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

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

        .section-head {
            display: grid;
            grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr);
            gap: 40px;
            align-items: end;
            margin-bottom: 42px;
        }

        .section-head p {
            margin: 0;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 13px;
            color: var(--cyan);
            font-size: .82rem;
            font-weight: 700;
            letter-spacing: .13em;
        }

        .eyebrow::before {
            content: "";
            width: 24px;
            height: 1px;
            background: currentColor;
            box-shadow: 0 0 10px currentColor;
        }

        .glass {
            background: linear-gradient(145deg, rgba(18, 42, 72, .8), rgba(8, 21, 39, .74));
            border: 1px solid var(--line);
            box-shadow: var(--shadow);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            min-height: 28px;
            padding: 4px 10px;
            border: 1px solid var(--line);
            border-radius: 999px;
            color: var(--text-soft);
            background: rgba(95, 154, 214, .08);
            font-size: .76rem;
            white-space: nowrap;
        }

        .badge::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
        }

        .btn {
            min-height: 48px;
            padding: 12px 19px;
            border: 1px solid transparent;
            border-radius: 13px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            color: #fff;
            font-weight: 700;
            cursor: pointer;
            transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease;
        }

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

        .btn:active {
            transform: translateY(0);
            box-shadow: inset 0 3px 12px rgba(0,0,0,.25);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-deep), #227ce9 60%, #269fc9);
            border-color: rgba(100, 230, 255, .46);
            box-shadow: 0 12px 30px rgba(31, 115, 255, .28), inset 0 1px rgba(255,255,255,.17);
        }

        .btn-primary:hover {
            box-shadow: 0 16px 38px rgba(31, 115, 255, .4), 0 0 20px rgba(72, 215, 255, .15);
        }

        .btn-secondary {
            color: var(--text);
            background: rgba(125, 171, 219, .08);
            border-color: var(--line);
        }

        .btn-secondary:hover {
            background: rgba(125, 171, 219, .15);
            border-color: var(--line-bright);
        }

        .btn[disabled] {
            opacity: .5;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .site-header {
            position: relative;
            z-index: 30;
            padding-top: 18px;
        }

        .nav-panel {
            min-height: 82px;
            padding: 10px;
            border-radius: 22px;
            display: grid;
            grid-template-columns: minmax(250px, 1fr) auto auto;
            align-items: center;
            gap: 14px;
        }

        .brand {
            min-width: 0;
            padding: 6px 10px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-mark {
            width: 44px;
            height: 44px;
            flex: 0 0 44px;
            border-radius: 13px;
            display: grid;
            place-items: center;
            color: var(--cyan);
            background: linear-gradient(145deg, rgba(49, 137, 255, .32), rgba(46, 210, 235, .08));
            border: 1px solid rgba(72, 215, 255, .3);
            box-shadow: inset 0 1px rgba(255,255,255,.16), 0 0 22px rgba(37, 143, 255, .17);
            font-weight: 900;
        }

        .brand-copy {
            min-width: 0;
        }

        .brand-name {
            display: block;
            overflow: hidden;
            color: var(--text);
            font-size: .98rem;
            font-weight: 800;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .brand-note {
            display: block;
            margin-top: 2px;
            color: var(--muted);
            font-size: .72rem;
        }

        .nav-links {
            display: flex;
            gap: 8px;
        }

        .nav-link {
            min-width: 112px;
            padding: 10px 13px;
            border: 1px solid var(--line);
            border-radius: 13px;
            background: rgba(112, 164, 219, .06);
            display: flex;
            align-items: center;
            gap: 10px;
            transition: .2s ease;
        }

        .nav-link:hover,
        .nav-link.active {
            border-color: var(--line-bright);
            background: rgba(45, 132, 224, .16);
            box-shadow: 0 0 20px rgba(39, 150, 255, .12);
        }

        .nav-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            display: grid;
            place-items: center;
            color: var(--cyan);
            background: rgba(72, 215, 255, .09);
            transition: transform .2s ease;
        }

        .nav-link:hover .nav-icon {
            transform: translateX(2px);
        }

        .nav-text strong,
        .nav-text small {
            display: block;
            line-height: 1.25;
        }

        .nav-text strong {
            font-size: .84rem;
        }

        .nav-text small {
            margin-top: 2px;
            color: var(--muted);
            font-size: .68rem;
        }

        .nav-cta {
            white-space: nowrap;
        }

        .hero {
            padding: clamp(48px, 7vw, 92px) 0 62px;
        }

        .hero-stage {
            position: relative;
            overflow: hidden;
            border-radius: 30px;
            padding: clamp(28px, 5vw, 68px);
        }

        .hero-stage::before {
            content: "";
            position: absolute;
            width: 500px;
            height: 500px;
            top: -260px;
            right: -70px;
            border: 1px solid rgba(72, 215, 255, .14);
            border-radius: 50%;
            box-shadow: 0 0 80px rgba(45, 118, 255, .14), inset 0 0 80px rgba(45, 118, 255, .08);
        }

        .hero-grid {
            position: relative;
            display: grid;
            grid-template-columns: minmax(0, 1.25fr) minmax(360px, .75fr);
            gap: clamp(34px, 6vw, 76px);
            align-items: center;
        }

        .hero-copy {
            max-width: 760px;
        }

        .hero-copy h1 span {
            color: transparent;
            background: linear-gradient(90deg, #fff 12%, #84e5ff 58%, #899dff);
            -webkit-background-clip: text;
            background-clip: text;
        }

        .hero-intro {
            max-width: 690px;
            margin-bottom: 27px;
            font-size: clamp(1rem, 1.5vw, 1.16rem);
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }

        .hero-points {
            display: flex;
            flex-wrap: wrap;
            gap: 14px 24px;
            padding: 0;
            margin: 0;
            list-style: none;
        }

        .hero-points li {
            color: var(--muted);
            font-size: .86rem;
        }

        .hero-points li::before {
            content: "✓";
            margin-right: 7px;
            color: var(--success);
        }

        .guide-card {
            position: relative;
            border-radius: 22px;
            padding: 19px;
            background: rgba(5, 16, 30, .64);
            border: 1px solid var(--line-bright);
            box-shadow: var(--glow);
        }

        .guide-cover {
            min-height: 212px;
            padding: 24px;
            border-radius: 17px;
            overflow: hidden;
            position: relative;
            background:
                linear-gradient(120deg, rgba(29, 80, 159, .94), rgba(14, 38, 71, .95)),
                var(--surface-solid);
            border: 1px solid rgba(255,255,255,.11);
        }

        .guide-cover::after {
            content: "";
            position: absolute;
            width: 190px;
            height: 190px;
            right: -40px;
            bottom: -70px;
            border: 28px solid rgba(72, 215, 255, .1);
            border-radius: 50%;
        }

        .guide-number {
            color: var(--cyan);
            font-size: .75rem;
            letter-spacing: .16em;
        }

        .guide-cover h2 {
            max-width: 290px;
            margin: 30px 0 10px;
            font-size: 1.65rem;
        }

        .guide-cover p {
            max-width: 280px;
            margin: 0;
            color: #bcd2e8;
            font-size: .86rem;
        }

        .guide-list {
            padding: 16px 3px 6px;
            margin: 0;
            list-style: none;
        }

        .guide-list li {
            padding: 8px 2px;
            display: flex;
            justify-content: space-between;
            gap: 16px;
            border-bottom: 1px solid rgba(139, 196, 255, .09);
            color: var(--text-soft);
            font-size: .82rem;
        }

        .guide-list span {
            color: var(--muted);
        }

        .mini-form {
            margin-top: 12px;
        }

        .field-inline {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 9px;
        }

        .input {
            width: 100%;
            min-height: 48px;
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 11px 14px;
            color: var(--text);
            background: rgba(2, 11, 22, .64);
            transition: .2s ease;
        }

        .input::placeholder {
            color: #66809e;
        }

        .input:hover {
            border-color: rgba(139, 196, 255, .29);
        }

        .input:focus {
            outline: 0;
            border-color: var(--cyan);
            box-shadow: 0 0 0 4px rgba(72, 215, 255, .11);
        }

        .form-note {
            margin: 9px 0 0;
            color: var(--muted);
            font-size: .72rem;
        }

        .form-status {
            min-height: 24px;
            margin-top: 8px;
            color: var(--success);
            font-size: .78rem;
        }

        .hero-benefits {
            margin-top: 18px;
            display: grid;
            grid-template-columns: 1.05fr .95fr 1.15fr;
            gap: 12px;
        }

        .benefit-line {
            padding: 17px 18px;
            border: 1px solid var(--line);
            border-radius: 15px;
            background: rgba(13, 33, 58, .58);
            display: flex;
            gap: 13px;
            align-items: flex-start;
        }

        .benefit-line b {
            width: 30px;
            height: 30px;
            flex: 0 0 30px;
            border-radius: 9px;
            display: grid;
            place-items: center;
            color: var(--cyan);
            background: rgba(72, 215, 255, .09);
        }

        .benefit-line strong {
            display: block;
            margin-bottom: 3px;
            font-size: .9rem;
        }

        .benefit-line span {
            display: block;
            color: var(--muted);
            font-size: .77rem;
            line-height: 1.55;
        }

        .metrics-board {
            padding: 10px;
            border-radius: var(--radius-lg);
            display: grid;
            grid-template-columns: 1.3fr .8fr .95fr 1.1fr;
        }

        .metric {
            min-height: 184px;
            padding: 25px;
            border-right: 1px solid var(--line);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

        .metric-value {
            color: var(--text);
            font-size: clamp(1.9rem, 3vw, 3rem);
            font-weight: 800;
            line-height: 1;
        }

        .metric-label {
            margin-top: 10px;
            display: block;
            color: var(--text-soft);
            font-weight: 700;
        }

        .metric p {
            margin: 10px 0 16px;
            color: var(--muted);
            font-size: .82rem;
        }

        .meter {
            height: 5px;
            overflow: hidden;
            border-radius: 99px;
            background: rgba(126, 172, 222, .1);
        }

        .meter i {
            display: block;
            width: var(--value);
            height: 100%;
            border-radius: inherit;
            background: linear-gradient(90deg, var(--primary), var(--cyan));
            box-shadow: 0 0 12px rgba(72, 215, 255, .4);
        }

        .matrix-layout {
            display: grid;
            grid-template-columns: 230px minmax(0, 1fr);
            gap: 18px;
        }

        .matrix-index {
            padding: 18px;
            border-radius: var(--radius);
            align-self: start;
            position: sticky;
            top: 20px;
        }

        .index-label {
            margin-bottom: 12px;
            color: var(--muted);
            font-size: .74rem;
            letter-spacing: .1em;
        }

        .index-item {
            padding: 14px 12px;
            border-left: 2px solid var(--line);
            color: var(--muted);
            font-size: .86rem;
            transition: .2s ease;
        }

        .index-item:hover,
        .index-item.active {
            color: var(--text);
            border-left-color: var(--cyan);
            background: linear-gradient(90deg, rgba(72, 215, 255, .08), transparent);
        }

        .matrix-content {
            display: grid;
            grid-template-columns: 1.3fr .7fr;
            gap: 18px;
        }

        .matrix-card {
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--line);
            background: linear-gradient(145deg, rgba(18, 43, 73, .72), rgba(7, 19, 35, .68));
            transition: .22s ease;
        }

        .matrix-card:hover {
            border-color: rgba(72, 215, 255, .3);
            transform: translateY(-3px);
            box-shadow: var(--glow);
        }

        .matrix-main {
            min-height: 310px;
            grid-row: span 2;
            position: relative;
            overflow: hidden;
        }

        .matrix-main::after {
            content: "";
            position: absolute;
            width: 240px;
            height: 240px;
            right: -110px;
            bottom: -100px;
            border-radius: 50%;
            border: 30px solid rgba(51, 139, 255, .07);
        }

        .card-top {
            display: flex;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 36px;
        }

        .card-number {
            color: var(--cyan);
            font-size: .78rem;
            font-weight: 800;
            letter-spacing: .12em;
        }

        .matrix-card p {
            margin-bottom: 22px;
            font-size: .9rem;
        }

        .text-link {
            display: inline-flex;
            gap: 8px;
            align-items: center;
            color: var(--cyan);
            font-size: .88rem;
            font-weight: 700;
        }

        .text-link:hover {
            color: #9aebff;
        }

        .text-link::after {
            content: "→";
            transition: transform .2s ease;
        }

        .text-link:hover::after {
            transform: translateX(4px);
        }

        .matrix-list {
            grid-column: 1 / -1;
            padding: 8px 24px;
            border-radius: var(--radius);
        }

        .matrix-row {
            min-height: 78px;
            padding: 14px 3px;
            border-bottom: 1px solid var(--line);
            display: grid;
            grid-template-columns: 55px minmax(0, 1fr) auto;
            gap: 16px;
            align-items: center;
        }

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

        .matrix-row .row-num {
            color: var(--muted);
            font-size: .78rem;
        }

        .matrix-row strong {
            display: block;
            font-size: .93rem;
        }

        .matrix-row span {
            display: block;
            margin-top: 3px;
            color: var(--muted);
            font-size: .76rem;
        }

        .news-loop {
            grid-column: 1 / -1;
            margin-top: 2px;
            border-radius: var(--radius);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1.25fr .75fr;
        }

        .news-main,
        .news-side {
            padding: 26px;
        }

        .news-side {
            border-left: 1px solid var(--line);
            background: rgba(29, 74, 119, .08);
        }

        .subhead {
            margin-bottom: 17px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .subhead h3 {
            margin: 0;
        }

        .news-item {
            padding: 14px 0;
            border-bottom: 1px solid var(--line);
            display: grid;
            grid-template-columns: 82px 1fr auto;
            gap: 14px;
            align-items: center;
        }

        .news-item:last-child {
            border-bottom: 0;
        }

        .news-date {
            color: var(--muted);
            font-size: .76rem;
        }

        .news-item a {
            font-size: .88rem;
            font-weight: 650;
        }

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

        .calendar {
            display: flex;
            gap: 7px;
            margin-bottom: 18px;
        }

        .date-chip {
            flex: 1;
            min-width: 0;
            padding: 8px 4px;
            border: 1px solid var(--line);
            border-radius: 10px;
            text-align: center;
            color: var(--muted);
            font-size: .68rem;
        }

        .date-chip strong {
            display: block;
            color: var(--text);
            font-size: .92rem;
        }

        .date-chip.active {
            border-color: var(--cyan);
            color: var(--cyan);
            background: rgba(72, 215, 255, .09);
        }

        .quick-entry {
            display: flex;
            flex-direction: column;
            gap: 9px;
        }

        .quick-entry a {
            padding: 12px;
            border: 1px solid var(--line);
            border-radius: 11px;
            display: flex;
            justify-content: space-between;
            color: var(--text-soft);
            font-size: .82rem;
            transition: .2s ease;
        }

        .quick-entry a:hover {
            border-color: var(--line-bright);
            background: var(--surface-hover);
        }

        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 56px 1fr;
            gap: 18px;
            align-items: stretch;
        }

        .compare-card {
            padding: clamp(24px, 4vw, 38px);
            border-radius: var(--radius-lg);
        }

        .compare-card.highlight {
            border-color: rgba(72, 215, 255, .36);
            box-shadow: var(--glow);
        }

        .compare-vs {
            align-self: center;
            width: 56px;
            height: 56px;
            display: grid;
            place-items: center;
            border: 1px solid var(--line);
            border-radius: 50%;
            color: var(--muted);
            background: var(--bg);
            font-size: .72rem;
            font-weight: 800;
        }

        .compare-title {
            margin: 18px 0 22px;
            font-size: 1.45rem;
        }

        .compare-list {
            padding: 0;
            margin: 0 0 26px;
            list-style: none;
        }

        .compare-list li {
            min-height: 55px;
            padding: 12px 0;
            border-bottom: 1px solid var(--line);
            display: flex;
            gap: 12px;
            color: var(--text-soft);
            font-size: .88rem;
        }

        .compare-list li::before {
            content: "—";
            color: var(--muted);
        }

        .highlight .compare-list li::before {
            content: "✓";
            color: var(--success);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 36px;
            align-items: start;
        }

        .faq-aside {
            padding: 28px;
            border-radius: var(--radius-lg);
            position: sticky;
            top: 20px;
        }

        .faq-aside p {
            font-size: .9rem;
        }

        .safety-note {
            margin-top: 25px;
            padding: 17px;
            border: 1px solid rgba(255, 201, 105, .22);
            border-radius: 13px;
            color: #d9c9a4;
            background: rgba(255, 201, 105, .05);
            font-size: .78rem;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            border: 1px solid var(--line);
            border-radius: 15px;
            overflow: hidden;
            background: rgba(13, 32, 56, .58);
            transition: .2s ease;
        }

        .faq-item:hover,
        .faq-item.open {
            border-color: rgba(72, 215, 255, .31);
        }

        .faq-question {
            width: 100%;
            min-height: 68px;
            padding: 17px 20px;
            border: 0;
            color: var(--text);
            background: transparent;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            text-align: left;
            font-weight: 700;
            cursor: pointer;
        }

        .faq-plus {
            width: 28px;
            height: 28px;
            flex: 0 0 28px;
            border-radius: 8px;
            display: grid;
            place-items: center;
            color: var(--cyan);
            background: rgba(72, 215, 255, .08);
            transition: transform .2s ease;
        }

        .faq-item.open .faq-plus {
            transform: rotate(45deg);
        }

        .faq-answer {
            display: none;
            padding: 0 20px 20px;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-answer p {
            margin: 0;
            color: var(--muted);
            font-size: .88rem;
        }

        .conversion-panel {
            padding: clamp(24px, 5vw, 56px);
            border-radius: 30px;
            display: grid;
            grid-template-columns: .82fr 1.18fr;
            gap: clamp(32px, 6vw, 74px);
            align-items: center;
        }

        .conversion-copy ol {
            padding: 0;
            margin: 28px 0;
            list-style: none;
            counter-reset: steps;
        }

        .conversion-copy li {
            counter-increment: steps;
            margin: 13px 0;
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-soft);
            font-size: .86rem;
        }

        .conversion-copy li::before {
            content: "0" counter(steps);
            color: var(--cyan);
            font-size: .74rem;
            font-weight: 800;
        }

        .privacy-line {
            padding: 14px 16px;
            border-left: 2px solid var(--success);
            color: var(--muted);
            background: rgba(84, 230, 174, .05);
            font-size: .78rem;
        }

        .preference-form {
            padding: 26px;
            border: 1px solid var(--line);
            border-radius: 20px;
            background: rgba(4, 15, 29, .62);
        }

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

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 7px;
        }

        .form-group.full {
            grid-column: 1 / -1;
        }

        .form-group label {
            color: var(--text-soft);
            font-size: .82rem;
            font-weight: 700;
        }

        .form-group textarea {
            min-height: 116px;
            resize: vertical;
        }

        .form-hint {
            color: var(--muted);
            font-size: .72rem;
        }

        .check-row {
            grid-column: 1 / -1;
            display: flex;
            gap: 10px;
            align-items: flex-start;
            color: var(--muted);
            font-size: .76rem;
        }

        .check-row input {
            width: 18px;
            height: 18px;
            margin-top: 3px;
            accent-color: var(--primary);
        }

        .form-actions {
            grid-column: 1 / -1;
            display: flex;
            gap: 12px;
            align-items: center;
            margin-top: 4px;
        }

        .result-box {
            display: none;
            grid-column: 1 / -1;
            padding: 15px;
            border: 1px solid rgba(84, 230, 174, .27);
            border-radius: 12px;
            color: #bcebd7;
            background: rgba(84, 230, 174, .06);
            font-size: .8rem;
            white-space: pre-line;
        }

        .result-box.show {
            display: block;
        }

        .site-footer {
            padding: 40px 0 96px;
            border-top: 1px solid var(--line);
            background: rgba(2, 8, 17, .52);
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr .6fr;
            gap: 40px;
            padding-bottom: 30px;
        }

        .footer-brand {
            max-width: 680px;
        }

        .footer-brand strong {
            display: block;
            margin-bottom: 10px;
            font-size: 1.04rem;
        }

        .footer-brand p {
            margin: 0;
            color: var(--muted);
            font-size: .82rem;
        }

        .footer-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 9px;
        }

        .footer-links a {
            padding: 10px 12px;
            border: 1px solid var(--line);
            border-radius: 10px;
            color: var(--text-soft);
            font-size: .8rem;
            transition: .2s ease;
        }

        .footer-links a:hover {
            color: var(--cyan);
            border-color: var(--line-bright);
            background: rgba(72, 215, 255, .06);
        }

        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid var(--line);
            display: flex;
            justify-content: space-between;
            gap: 20px;
            color: var(--muted);
            font-size: .74rem;
        }

        .online-status {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .online-status::before {
            content: "";
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 9px var(--success);
        }

        .floating-bar {
            position: fixed;
            z-index: 50;
            left: 50%;
            bottom: 16px;
            width: min(calc(100% - 28px), 780px);
            min-height: 58px;
            padding: 8px 9px 8px 18px;
            border: 1px solid rgba(72, 215, 255, .3);
            border-radius: 17px;
            transform: translateX(-50%);
            background: rgba(7, 21, 40, .91);
            box-shadow: 0 18px 50px rgba(0,0,0,.48), 0 0 28px rgba(46, 130, 255, .13);
            backdrop-filter: blur(18px);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .floating-copy {
            min-width: 0;
        }

        .floating-copy strong,
        .floating-copy span {
            display: block;
        }

        .floating-copy strong {
            font-size: .84rem;
        }

        .floating-copy span {
            color: var(--muted);
            font-size: .7rem;
        }

        .back-top {
            width: 42px;
            height: 42px;
            flex: 0 0 42px;
            border: 1px solid var(--line);
            border-radius: 12px;
            display: grid;
            place-items: center;
            color: var(--cyan);
            background: rgba(72, 215, 255, .07);
        }

        .back-top:hover {
            border-color: var(--line-bright);
            background: rgba(72, 215, 255, .14);
        }

        @media (max-width: 1200px) {
            .container {
                width: min(calc(100% - 32px), 1120px);
            }

            .nav-panel {
                grid-template-columns: minmax(210px, 1fr) auto;
            }

            .nav-links {
                grid-row: 2;
                grid-column: 1 / -1;
            }

            .nav-link {
                flex: 1;
            }

            .hero-grid {
                grid-template-columns: 1.15fr .85fr;
                gap: 36px;
            }

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

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

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

        @media (max-width: 992px) {
            .hero-grid,
            .conversion-panel {
                grid-template-columns: 1fr;
            }

            .hero-copy {
                max-width: none;
            }

            .guide-card {
                max-width: 680px;
            }

            .hero-benefits {
                grid-template-columns: 1fr;
            }

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

            .matrix-index {
                position: static;
                display: flex;
                overflow-x: auto;
                padding: 10px;
            }

            .index-label {
                display: none;
            }

            .index-item {
                min-width: max-content;
                border-left: 0;
                border-bottom: 2px solid var(--line);
            }

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

            .matrix-main {
                grid-column: 1 / -1;
                grid-row: auto;
            }

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

            .compare-vs {
                margin: -5px auto;
                transform: rotate(90deg);
            }

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

            .faq-aside {
                position: static;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section: 74px;
            }

            .container {
                width: min(calc(100% - 24px), 680px);
            }

            .site-header {
                padding-top: 10px;
            }

            .nav-panel {
                grid-template-columns: 1fr auto;
                gap: 8px;
                border-radius: 17px;
            }

            .brand {
                padding-left: 4px;
            }

            .brand-mark {
                width: 38px;
                height: 38px;
                flex-basis: 38px;
            }

            .brand-name {
                max-width: 310px;
                font-size: .82rem;
            }

            .brand-note {
                display: none;
            }

            .nav-cta {
                min-height: 42px;
                padding: 9px 13px;
                font-size: .78rem;
            }

            .nav-links {
                width: 100%;
                overflow-x: auto;
                scrollbar-width: none;
            }

            .nav-link {
                min-width: 150px;
                flex: 0 0 auto;
            }

            .hero {
                padding-top: 34px;
            }

            .hero-stage {
                padding: 27px 20px;
                border-radius: 22px;
            }

            .section-head {
                grid-template-columns: 1fr;
                gap: 10px;
                margin-bottom: 28px;
            }

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

            .metric {
                min-height: 158px;
                padding: 19px;
            }

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

            .matrix-main,
            .matrix-list,
            .news-loop {
                grid-column: auto;
            }

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

            .news-side {
                border-top: 1px solid var(--line);
                border-left: 0;
            }

            .faq-aside,
            .preference-form {
                padding: 21px;
            }

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

            .form-group,
            .form-group.full,
            .check-row,
            .form-actions,
            .result-box {
                grid-column: 1;
            }

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

        @media (max-width: 576px) {
            body {
                font-size: 15px;
            }

            h1 {
                font-size: clamp(2rem, 11vw, 3rem);
                overflow-wrap: anywhere;
            }

            .brand-name {
                max-width: 175px;
            }

            .nav-cta {
                width: 42px;
                padding: 0;
                font-size: 0;
            }

            .nav-cta::after {
                content: "↓";
                font-size: 1rem;
            }

            .hero-actions {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }

            .hero-actions .btn:first-child {
                grid-column: 1 / -1;
            }

            .field-inline {
                grid-template-columns: 1fr;
            }

            .metrics-board {
                display: flex;
                overflow-x: auto;
                scroll-snap-type: x mandatory;
            }

            .metric {
                min-width: 82%;
                border-right: 1px solid var(--line) !important;
                border-bottom: 0 !important;
                scroll-snap-align: start;
            }

            .matrix-card,
            .matrix-list {
                padding: 20px;
            }

            .matrix-row {
                grid-template-columns: 38px 1fr;
            }

            .matrix-row .badge {
                grid-column: 2;
                justify-self: start;
            }

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

            .news-date {
                grid-column: 1 / -1;
            }

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

            .footer-bottom {
                flex-direction: column;
            }

            .floating-bar {
                padding-left: 12px;
            }

            .floating-copy span {
                display: none;
            }

            .floating-bar .btn {
                min-height: 42px;
                padding: 9px 12px;
                font-size: .76rem;
            }

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

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

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }

            *, *::before, *::after {
                animation: none !important;
                transition-duration: .01ms !important;
            }
        }

/* roulang page: category1 */
:root {
  --bg: #050d19;
  --bg-deep: #030914;
  --surface: rgba(12, 29, 52, .82);
  --surface-solid: #0c1d34;
  --surface-soft: rgba(18, 43, 74, .58);
  --surface-hover: rgba(24, 58, 96, .72);
  --primary: #338bff;
  --primary-deep: #1c57d7;
  --cyan: #48d7ff;
  --violet: #8e7dff;
  --text: #eef7ff;
  --text-soft: #c4d4e7;
  --muted: #8298b2;
  --line: rgba(139, 196, 255, .16);
  --line-bright: rgba(72, 215, 255, .44);
  --success: #54e6ae;
  --warning: #ffc969;
  --danger: #ff7c98;
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius: 18px;
  --radius-lg: 26px;
  --shadow: 0 24px 70px rgba(0, 5, 15, .42);
  --glow: 0 0 0 1px rgba(72, 215, 255, .12), 0 14px 40px rgba(28, 111, 255, .22);
  --container: 1240px;
  --section: 74px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 5%, rgba(42, 99, 203, .19), transparent 30rem),
    radial-gradient(circle at 86% 18%, rgba(56, 205, 240, .10), transparent 27rem),
    linear-gradient(rgba(63, 113, 170, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63, 113, 170, .035) 1px, transparent 1px),
    var(--bg);
  background-size: auto, auto, 48px 48px, 48px 48px, auto;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .2;
  background-image: radial-gradient(rgba(255,255,255,.14) .55px, transparent .55px);
  background-size: 8px 8px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button, a, input, select, textarea, summary {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

:focus-visible {
  outline: 3px solid rgba(72, 215, 255, .72);
  outline-offset: 3px;
}

::selection {
  color: #fff;
  background: rgba(51, 139, 255, .72);
}

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

.glass {
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(17, 39, 68, .86), rgba(7, 20, 37, .78));
  box-shadow: var(--shadow), inset 0 1px rgba(255,255,255,.04);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

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

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr);
  gap: 40px;
  align-items: end;
  margin-bottom: 38px;
}

.section-head h2,
.section-head p {
  margin: 0;
}

.section-head h2 {
  max-width: 760px;
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -.035em;
}

.section-head p {
  color: var(--text-soft);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 13px;
  color: var(--cyan);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .13em;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: currentColor;
  box-shadow: 0 0 10px currentColor;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 28px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-soft);
  background: rgba(95, 154, 214, .08);
  font-size: .76rem;
  white-space: nowrap;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.badge.update::before {
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
}

.badge.caution::before {
  background: var(--warning);
  box-shadow: 0 0 10px var(--warning);
}

.btn {
  min-height: 48px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  color: #fff;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease, opacity .2s ease;
}

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

.btn:active {
  transform: translateY(0);
  box-shadow: inset 0 3px 12px rgba(0,0,0,.25);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-deep), #227ce9 60%, #269fc9);
  border-color: rgba(100, 230, 255, .46);
  box-shadow: 0 12px 30px rgba(31, 115, 255, .28), inset 0 1px rgba(255,255,255,.17);
}

.btn-primary:hover {
  box-shadow: 0 16px 38px rgba(31, 115, 255, .4), 0 0 20px rgba(72, 215, 255, .15);
}

.btn-secondary {
  color: var(--text);
  background: rgba(125, 171, 219, .08);
  border-color: var(--line);
}

.btn-secondary:hover {
  background: rgba(125, 171, 219, .15);
  border-color: var(--line-bright);
}

.btn-small {
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 11px;
  font-size: .88rem;
}

.btn[disabled],
.btn.disabled {
  opacity: .45;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
  box-shadow: none;
}

.site-header {
  position: relative;
  z-index: 50;
  padding-top: 18px;
}

.nav-panel {
  min-height: 86px;
  padding: 12px;
  border-radius: 22px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand {
  min-width: 330px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 50px;
  height: 50px;
  flex: 0 0 50px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(72, 215, 255, .45);
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(145deg, #286de7, #173b86);
  box-shadow: 0 9px 26px rgba(30, 108, 237, .34), inset 0 1px rgba(255,255,255,.22);
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: -.04em;
}

.brand-copy {
  min-width: 0;
  display: grid;
  line-height: 1.25;
}

.brand-name {
  color: var(--text);
  font-size: .96rem;
  font-weight: 800;
  white-space: nowrap;
}

.brand-note {
  margin-top: 5px;
  color: var(--muted);
  font-size: .72rem;
}

.nav-links {
  display: flex;
  align-items: stretch;
  gap: 8px;
  margin-left: auto;
}

.nav-link {
  min-width: 136px;
  min-height: 58px;
  padding: 8px 11px;
  border: 1px solid transparent;
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: 9px;
  background: rgba(111, 164, 220, .05);
  transition: background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.nav-link:hover {
  border-color: var(--line);
  background: var(--surface-hover);
  transform: translateY(-1px);
}

.nav-link.active {
  border-color: rgba(72, 215, 255, .36);
  background: rgba(41, 111, 191, .24);
  box-shadow: inset 0 0 20px rgba(46, 152, 255, .08), 0 0 20px rgba(41, 130, 255, .08);
}

.nav-icon {
  width: 31px;
  height: 31px;
  flex: 0 0 31px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--cyan);
  background: rgba(71, 158, 255, .08);
  transition: transform .2s ease;
}

.nav-link:hover .nav-icon {
  transform: translateX(2px);
}

.nav-text {
  display: grid;
  line-height: 1.2;
}

.nav-text strong {
  font-size: .86rem;
}

.nav-text small {
  margin-top: 5px;
  color: var(--muted);
  font-size: .68rem;
}

.nav-cta {
  margin-left: 2px;
  white-space: nowrap;
}

.menu-toggle {
  width: 48px;
  height: 48px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 13px;
  display: none;
  place-items: center;
  color: var(--text);
  background: var(--surface-soft);
  cursor: pointer;
}

.page-hero {
  position: relative;
  padding: 42px 0 28px;
}

.page-hero::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -130px;
  width: 430px;
  height: 430px;
  border: 1px solid rgba(72, 215, 255, .07);
  border-radius: 50%;
  box-shadow: 0 0 90px rgba(39, 111, 255, .08);
  pointer-events: none;
}

.hero-console {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--radius-lg);
}

.hero-console::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent, rgba(72,215,255,.035), transparent),
    radial-gradient(circle at 92% 14%, rgba(72, 215, 255, .13), transparent 22rem);
}

.breadcrumb {
  position: relative;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: .84rem;
}

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

.breadcrumb span[aria-hidden="true"] {
  color: #4c6681;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, .65fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 17px;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2.2rem, 5.2vw, 4.65rem);
  line-height: 1.08;
  letter-spacing: -.055em;
  overflow-wrap: anywhere;
}

.hero-title-accent {
  display: block;
  margin-top: 7px;
  color: transparent;
  background: linear-gradient(90deg, #dff8ff, var(--cyan) 45%, #9e92ff);
  -webkit-background-clip: text;
  background-clip: text;
  font-size: .56em;
  letter-spacing: -.03em;
}

.hero-summary {
  max-width: 780px;
  margin: 22px 0 0;
  color: var(--text-soft);
  font-size: clamp(1rem, 1.7vw, 1.12rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.qualification-card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line-bright);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(21, 57, 96, .74), rgba(8, 24, 43, .9));
  box-shadow: var(--glow);
}

.qualification-card h2 {
  margin: 12px 0 8px;
  font-size: 1.25rem;
}

.qualification-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: .9rem;
}

.check-list {
  display: grid;
  gap: 11px;
  margin: 20px 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-soft);
  font-size: .88rem;
}

.check-list li::before {
  content: "✓";
  width: 21px;
  height: 21px;
  flex: 0 0 21px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--success);
  background: rgba(84, 230, 174, .1);
  font-size: .72rem;
  font-weight: 900;
}

.qualification-card .btn {
  width: 100%;
}

.mini-notice {
  margin-top: 13px !important;
  color: var(--muted) !important;
  font-size: .76rem !important;
  text-align: center;
}

.filter-section {
  padding: 28px 0 34px;
}

.filter-panel {
  padding: 22px;
  border-radius: var(--radius);
}

.filter-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.filter-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.filter-title span:first-child {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--cyan);
  background: rgba(72, 215, 255, .07);
}

.filter-title strong {
  display: block;
}

.filter-title small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
}

.filter-result {
  color: var(--text-soft);
  font-size: .86rem;
}

.filter-result strong {
  color: var(--cyan);
  font-size: 1.05rem;
}

.filter-groups {
  display: grid;
  gap: 14px;
}

.filter-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

.filter-label {
  color: var(--muted);
  font-size: .82rem;
  font-weight: 700;
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.filter-chip {
  min-height: 39px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-soft);
  background: rgba(97, 151, 208, .06);
  cursor: pointer;
  transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.filter-chip:hover {
  color: var(--text);
  border-color: rgba(72, 215, 255, .3);
  background: rgba(72, 215, 255, .09);
}

.filter-chip:active {
  transform: scale(.98);
}

.filter-chip.active,
.filter-chip[aria-pressed="true"] {
  color: #fff;
  border-color: var(--line-bright);
  background: rgba(39, 129, 214, .24);
  box-shadow: 0 0 18px rgba(72, 215, 255, .1), inset 0 1px rgba(255,255,255,.08);
}

.index-section {
  padding: 46px 0 var(--section);
}

.index-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.index-rail {
  position: sticky;
  top: 20px;
  padding: 18px;
  border-radius: var(--radius);
}

.index-rail h2 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.index-rail > p {
  margin: 0 0 17px;
  color: var(--muted);
  font-size: .78rem;
}

.rail-links {
  position: relative;
  display: grid;
  gap: 5px;
}

.rail-links::before {
  content: "";
  position: absolute;
  top: 19px;
  bottom: 19px;
  left: 15px;
  width: 1px;
  background: linear-gradient(var(--cyan), rgba(72, 215, 255, .08));
}

.rail-link {
  position: relative;
  min-height: 48px;
  padding: 8px 9px 8px 38px;
  border: 1px solid transparent;
  border-radius: 11px;
  display: grid;
  align-content: center;
  color: var(--text-soft);
  background: transparent;
  transition: .2s ease;
}

.rail-link::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 50%;
  width: 9px;
  height: 9px;
  border: 2px solid #4f718e;
  border-radius: 50%;
  background: var(--surface-solid);
  transform: translateY(-50%);
  z-index: 1;
}

.rail-link:hover,
.rail-link.active {
  color: var(--text);
  border-color: var(--line);
  background: rgba(63, 132, 207, .1);
}

.rail-link.active::before {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.rail-link small {
  color: var(--muted);
  font-size: .67rem;
}

.content-stream {
  display: grid;
  gap: 16px;
}

.stream-heading {
  padding: 4px 2px 14px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.stream-heading h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  line-height: 1.2;
}

.stream-heading p {
  margin: 8px 0 0;
  color: var(--muted);
}

.sort-select {
  min-width: 150px;
  min-height: 44px;
  padding: 8px 36px 8px 13px;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--text);
  background: var(--surface-solid);
  cursor: pointer;
}

.sort-select:hover,
.sort-select:focus {
  border-color: var(--line-bright);
}

.topic-card {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) 168px;
  gap: 20px;
  align-items: center;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(15, 35, 61, .88), rgba(8, 22, 40, .88));
  box-shadow: 0 14px 42px rgba(0, 6, 18, .2);
  transition: border-color .25s ease, background .25s ease, transform .25s ease, box-shadow .25s ease;
}

.topic-card::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(transparent, var(--cyan), transparent);
  opacity: .35;
}

.topic-card:hover {
  border-color: rgba(72, 215, 255, .31);
  background: linear-gradient(135deg, rgba(20, 46, 78, .94), rgba(9, 25, 45, .92));
  box-shadow: 0 20px 50px rgba(0, 5, 18, .3), 0 0 28px rgba(38, 125, 255, .07);
  transform: translateY(-2px);
}

.topic-card[hidden] {
  display: none;
}

.topic-number {
  width: 66px;
  height: 78px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(91, 177, 255, .2);
  border-radius: 15px;
  color: rgba(194, 229, 255, .85);
  background:
    linear-gradient(145deg, rgba(48, 130, 214, .18), rgba(73, 74, 175, .14)),
    repeating-linear-gradient(135deg, transparent 0 8px, rgba(255,255,255,.02) 8px 9px);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: .08em;
}

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

.topic-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 9px;
}

.topic-main h3 {
  margin: 0;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.3;
}

.topic-main p {
  margin: 8px 0 0;
  color: var(--text-soft);
  font-size: .91rem;
}

.topic-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}

.progress-track {
  height: 5px;
  flex: 1;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(131, 178, 221, .11);
}

.progress-bar {
  height: 100%;
  width: var(--progress, 65%);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  box-shadow: 0 0 11px rgba(72, 215, 255, .25);
}

.progress-label {
  color: var(--muted);
  font-size: .7rem;
  white-space: nowrap;
}

.topic-action {
  display: grid;
  gap: 10px;
}

.topic-action .btn {
  width: 100%;
}

.topic-action small {
  color: var(--muted);
  font-size: .72rem;
  text-align: center;
}

.empty-state {
  display: none;
  padding: 48px 24px;
  border: 1px dashed var(--line-bright);
  border-radius: var(--radius);
  color: var(--text-soft);
  background: rgba(12, 29, 52, .58);
  text-align: center;
}

.empty-state.show {
  display: block;
}

.empty-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 15px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--cyan);
  background: rgba(72, 215, 255, .07);
  font-size: 1.4rem;
}

.empty-state h3 {
  margin: 0;
  color: var(--text);
}

.empty-state p {
  margin: 7px auto 18px;
  max-width: 520px;
}

.load-panel {
  margin-top: 9px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: rgba(12, 29, 52, .48);
}

.load-copy {
  color: var(--muted);
  font-size: .84rem;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 7px;
}

.page-link {
  min-width: 42px;
  min-height: 42px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 11px;
  display: grid;
  place-items: center;
  color: var(--text-soft);
  background: rgba(91, 148, 205, .06);
  transition: .2s ease;
}

.page-link:hover {
  color: #fff;
  border-color: var(--line-bright);
  background: rgba(54, 137, 220, .17);
}

.page-link.active {
  color: #fff;
  border-color: rgba(72, 215, 255, .4);
  background: var(--primary-deep);
  box-shadow: 0 8px 22px rgba(31, 115, 255, .23);
}

.page-link.disabled {
  opacity: .38;
  pointer-events: none;
}

.insight-strip {
  padding: 0 0 var(--section);
}

.insight-panel {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.insight-intro,
.insight-cell {
  padding: 28px;
}

.insight-intro {
  background: linear-gradient(145deg, rgba(29, 83, 143, .24), rgba(10, 28, 49, .38));
}

.insight-intro h2 {
  margin: 8px 0 9px;
  font-size: 1.45rem;
}

.insight-intro p,
.insight-cell p {
  margin: 0;
  color: var(--text-soft);
  font-size: .88rem;
}

.insight-cell {
  border-left: 1px solid var(--line);
}

.insight-cell strong {
  display: block;
  margin: 12px 0 7px;
  font-size: 1.05rem;
}

.icon-box {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--cyan);
  background: rgba(72, 215, 255, .07);
}

.preference-section {
  padding: 0 0 var(--section);
}

.preference-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(25px, 4vw, 44px);
  border-radius: var(--radius-lg);
}

.preference-panel::before {
  content: "";
  position: absolute;
  right: -100px;
  bottom: -170px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(51, 139, 255, .12);
  filter: blur(50px);
  pointer-events: none;
}

.preference-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(420px, 1.15fr);
  gap: 46px;
  align-items: center;
}

.preference-copy h2 {
  margin: 9px 0 13px;
  font-size: clamp(1.7rem, 3.2vw, 2.65rem);
  line-height: 1.18;
}

.preference-copy p {
  margin: 0;
  color: var(--text-soft);
}

.safety-note {
  margin-top: 20px;
  padding: 14px 16px;
  border-left: 2px solid var(--cyan);
  border-radius: 0 11px 11px 0;
  color: var(--muted);
  background: rgba(72, 215, 255, .05);
  font-size: .82rem;
}

.preference-builder {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 17, 31, .62);
}

.builder-group + .builder-group {
  margin-top: 17px;
}

.builder-label {
  display: block;
  margin-bottom: 9px;
  color: var(--text-soft);
  font-size: .82rem;
  font-weight: 700;
}

.builder-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.option-button {
  min-height: 40px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--text-soft);
  background: rgba(91, 148, 205, .06);
  cursor: pointer;
  transition: .2s ease;
}

.option-button:hover,
.option-button.selected {
  color: #fff;
  border-color: var(--line-bright);
  background: rgba(48, 126, 207, .2);
}

.builder-action {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-top: 20px;
}

.builder-status {
  min-height: 26px;
  color: var(--muted);
  font-size: .8rem;
}

.builder-status.loading {
  color: var(--cyan);
}

.builder-status.success {
  color: var(--success);
}

.builder-status.error {
  color: var(--danger);
}

.summary-output {
  display: none;
  margin-top: 16px;
  padding: 15px;
  border: 1px solid rgba(84, 230, 174, .24);
  border-radius: 12px;
  color: var(--text-soft);
  background: rgba(84, 230, 174, .055);
  font-size: .86rem;
}

.summary-output.show {
  display: block;
}

.faq-section {
  padding: 0 0 var(--section);
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(260px, .62fr) minmax(0, 1.38fr);
  gap: 34px;
}

.faq-intro {
  position: sticky;
  top: 20px;
  align-self: start;
}

.faq-intro h2 {
  margin: 8px 0 12px;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.2;
}

.faq-intro p {
  margin: 0;
  color: var(--text-soft);
}

.faq-list {
  display: grid;
  gap: 11px;
}

.faq-item {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(12, 29, 52, .68);
  transition: border-color .2s ease, background .2s ease;
}

.faq-item:hover,
.faq-item[open] {
  border-color: rgba(72, 215, 255, .3);
  background: rgba(17, 40, 68, .84);
}

.faq-item summary {
  min-height: 62px;
  padding: 16px 52px 16px 18px;
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--cyan);
  transform: translateY(-50%);
  transition: transform .2s ease, background .2s ease;
}

.faq-item[open] summary::after {
  content: "−";
  background: rgba(72, 215, 255, .08);
}

.faq-answer {
  padding: 0 18px 18px;
  color: var(--text-soft);
  font-size: .91rem;
}

.faq-answer p {
  margin: 0;
}

.bottom-cta {
  padding: 0 0 var(--section);
}

.cta-panel {
  padding: 26px 30px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.cta-panel h2 {
  margin: 0 0 6px;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
}

.cta-panel p {
  margin: 0;
  color: var(--text-soft);
}

.cta-actions {
  display: flex;
  gap: 10px;
  flex: 0 0 auto;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(to bottom, rgba(3, 11, 22, .6), var(--bg-deep));
}

.footer-top {
  padding: 46px 0 34px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr);
  gap: 50px;
}

.footer-brand strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.footer-brand p {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: .85rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.footer-links a {
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text-soft);
  background: rgba(75, 130, 187, .04);
  font-size: .84rem;
  transition: .2s ease;
}

.footer-links a:hover {
  color: var(--cyan);
  border-color: var(--line);
  background: rgba(75, 130, 187, .09);
}

.footer-bottom {
  min-height: 70px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: .78rem;
}

.online-status {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.online-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 9px var(--success);
}

.back-top {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--text);
  background: rgba(85, 141, 198, .07);
  transition: .2s ease;
}

.back-top:hover {
  border-color: var(--line-bright);
  background: rgba(72, 215, 255, .1);
  transform: translateY(-2px);
}

.age-dialog {
  width: min(calc(100% - 32px), 520px);
  padding: 0;
  border: 1px solid var(--line-bright);
  border-radius: var(--radius-lg);
  color: var(--text);
  background: #09172a;
  box-shadow: 0 30px 100px rgba(0,0,0,.68), 0 0 45px rgba(51,139,255,.15);
}

.age-dialog::backdrop {
  background: rgba(1, 6, 13, .84);
  backdrop-filter: blur(9px);
}

.dialog-content {
  padding: 30px;
}

.dialog-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-bright);
  border-radius: 16px;
  color: var(--cyan);
  background: rgba(72, 215, 255, .08);
  font-weight: 900;
}

.dialog-content h2 {
  margin: 18px 0 9px;
  font-size: 1.55rem;
}

.dialog-content p {
  margin: 0;
  color: var(--text-soft);
}

.dialog-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 24px;
}

@media (max-width: 1200px) {
  .container {
    width: min(calc(100% - 32px), 1120px);
  }

  .brand {
    min-width: 290px;
  }

  .brand-name {
    font-size: .86rem;
  }

  .nav-link {
    min-width: 122px;
  }

  .nav-cta {
    padding-inline: 14px;
  }
}

@media (max-width: 992px) {
  .nav-panel {
    flex-wrap: wrap;
  }

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

  .menu-toggle {
    display: grid;
  }

  .nav-links {
    width: 100%;
    order: 3;
    margin: 0;
    padding-top: 3px;
    display: none;
    overflow-x: auto;
    scrollbar-width: thin;
  }

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

  .nav-link {
    flex: 1 0 160px;
  }

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

  .hero-grid,
  .preference-grid {
    grid-template-columns: 1fr;
  }

  .qualification-card {
    max-width: 680px;
  }

  .index-layout {
    grid-template-columns: 190px minmax(0, 1fr);
  }

  .topic-card {
    grid-template-columns: 68px minmax(0, 1fr);
  }

  .topic-action {
    grid-column: 2;
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .topic-action small {
    text-align: right;
  }

  .insight-panel {
    grid-template-columns: 1fr 1fr;
  }

  .insight-intro {
    grid-column: 1 / -1;
  }

  .insight-cell:nth-child(3) {
    border-left: 1px solid var(--line);
  }
}

@media (max-width: 768px) {
  :root {
    --section: 62px;
  }

  .container {
    width: min(calc(100% - 24px), var(--container));
  }

  .site-header {
    padding-top: 10px;
  }

  .nav-panel {
    min-height: 74px;
    padding: 9px;
    border-radius: 18px;
  }

  .brand-mark {
    width: 44px;
    height: 44px;
    flex-basis: 44px;
    border-radius: 13px;
  }

  .brand-name {
    max-width: 270px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .brand-note {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .page-hero {
    padding-top: 25px;
  }

  .hero-console {
    padding: 22px;
  }

  .breadcrumb {
    margin-bottom: 21px;
  }

  h1 {
    font-size: clamp(2rem, 10vw, 3.5rem);
  }

  .hero-actions .btn {
    flex: 1;
  }

  .filter-top,
  .stream-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .filter-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .filter-options {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }

  .filter-chip {
    flex: 0 0 auto;
  }

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

  .index-rail,
  .faq-intro {
    position: static;
  }

  .index-rail {
    overflow-x: auto;
  }

  .rail-links {
    min-width: 620px;
    display: flex;
  }

  .rail-links::before {
    top: auto;
    bottom: 7px;
    left: 14px;
    right: 14px;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), rgba(72,215,255,.08));
  }

  .rail-link {
    min-width: 145px;
    padding: 8px 12px 22px;
  }

  .rail-link::before {
    top: auto;
    left: 50%;
    bottom: 2px;
    transform: translateX(-50%);
  }

  .topic-card {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 15px;
    padding: 18px;
  }

  .topic-number {
    width: 54px;
    height: 70px;
  }

  .load-panel,
  .cta-panel {
    align-items: flex-start;
    flex-direction: column;
  }

  .insight-panel {
    grid-template-columns: 1fr;
  }

  .insight-intro {
    grid-column: auto;
  }

  .insight-cell {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .insight-cell:nth-child(3) {
    border-left: 0;
  }

  .preference-grid,
  .faq-layout,
  .section-head,
  .footer-top {
    grid-template-columns: 1fr;
  }

  .section-head {
    gap: 16px;
  }

  .preference-builder {
    padding: 18px;
  }

  .footer-top {
    gap: 28px;
  }
}

@media (max-width: 576px) {
  body {
    font-size: 15px;
  }

  .brand-copy {
    max-width: calc(100vw - 150px);
  }

  .brand-name {
    max-width: 100%;
  }

  .menu-toggle {
    width: 44px;
    height: 44px;
  }

  .hero-console,
  .filter-panel,
  .preference-panel {
    border-radius: 18px;
  }

  .hero-console {
    padding: 18px;
  }

  .hero-badges .badge:nth-child(2) {
    display: none;
  }

  h1 {
    font-size: clamp(1.85rem, 10vw, 2.65rem);
  }

  .hero-summary {
    font-size: .95rem;
  }

  .hero-actions,
  .dialog-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-actions .btn,
  .cta-actions,
  .cta-actions .btn,
  .builder-action,
  .builder-action .btn {
    width: 100%;
  }

  .qualification-card {
    padding: 19px;
  }

  .filter-panel {
    padding: 17px;
  }

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

  .topic-number {
    width: 100%;
    height: 50px;
    justify-content: start;
    padding-left: 16px;
  }

  .topic-action {
    grid-column: 1;
    grid-template-columns: 1fr;
  }

  .topic-action small {
    text-align: center;
  }

  .load-panel {
    padding: 15px;
  }

  .pagination {
    width: 100%;
  }

  .page-link {
    flex: 1;
    min-width: 38px;
  }

  .preference-panel {
    padding: 19px;
  }

  .builder-action {
    align-items: stretch;
    flex-direction: column;
  }

  .faq-item summary {
    min-height: 58px;
  }

  .cta-panel {
    padding: 22px;
  }

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

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

  .footer-bottom {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .online-status {
    width: calc(100% - 56px);
    margin-left: 0;
  }

  .back-top {
    margin-left: auto;
  }

  .dialog-content {
    padding: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .btn:hover,
  .topic-card:hover,
  .back-top:hover {
    transform: none;
  }
}