/* roulang page: index */
:root {
            --primary: #2468d8;
            --primary-dark: #174ea6;
            --primary-soft: #eaf2ff;
            --navy: #0b1f3a;
            --navy-2: #102f5d;
            --cyan: #55c8e8;
            --accent: #ffb84d;
            --success: #1d9a6c;
            --danger: #e25555;
            --background: #f4f8fd;
            --surface: #ffffff;
            --surface-soft: #eef5fc;
            --text: #14233b;
            --muted: #63738a;
            --border: #dbe6f1;
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 30px;
            --shadow-sm: 0 8px 24px rgba(24, 62, 111, .08);
            --shadow-md: 0 18px 48px rgba(20, 58, 105, .13);
            --shadow-lg: 0 28px 72px rgba(3, 21, 48, .2);
            --transition: 180ms ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            color: var(--text);
            background:
                radial-gradient(circle at 8% 5%, rgba(85, 200, 232, .12), transparent 23rem),
                linear-gradient(180deg, #f8fbff 0%, var(--background) 52%, #f8fbff 100%);
            font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        button, input {
            font: inherit;
        }

        button, a {
            -webkit-tap-highlight-color: transparent;
        }

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

        :focus-visible {
            outline: 3px solid rgba(36, 104, 216, .32);
            outline-offset: 3px;
        }

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

        .site-header {
            position: relative;
            z-index: 1000;
            padding: 18px 0 4px;
        }

        .nav-shell {
            min-height: 72px;
            padding: 8px 10px 8px 18px;
            border: 1px solid rgba(208, 222, 238, .92);
            border-radius: 999px;
            background: rgba(255, 255, 255, .88);
            box-shadow: 0 14px 38px rgba(25, 67, 117, .12);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            min-width: 0;
            color: var(--navy);
            font-weight: 900;
            letter-spacing: -.03em;
        }

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

        .brand-mark {
            position: relative;
            display: grid;
            width: 42px;
            height: 42px;
            flex: 0 0 auto;
            place-items: center;
            overflow: hidden;
            border-radius: 14px;
            color: #fff;
            background: linear-gradient(145deg, var(--primary), var(--navy-2));
            box-shadow: 0 9px 20px rgba(36, 104, 216, .25);
        }

        .brand-mark::after {
            position: absolute;
            width: 16px;
            height: 16px;
            content: "";
            border: 4px solid rgba(255,255,255,.9);
            border-left-color: transparent;
            border-radius: 50%;
        }

        .brand-text {
            overflow: hidden;
            font-size: 17px;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .navbar-nav {
            gap: 5px;
        }

        .navbar-nav .nav-link {
            padding: 10px 17px !important;
            border-radius: 999px;
            color: #4d6079;
            font-size: 14px;
            font-weight: 750;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary-dark);
            background: var(--primary-soft);
        }

        .navbar-nav .nav-link.active {
            color: #fff;
            background: var(--navy);
            box-shadow: 0 7px 18px rgba(11, 31, 58, .18);
        }

        .nav-search {
            display: flex;
            align-items: center;
            width: 225px;
            height: 44px;
            margin-left: 10px;
            overflow: hidden;
            border: 1px solid var(--border);
            border-radius: 999px;
            background: #f7faff;
        }

        .nav-search input {
            width: 100%;
            min-width: 0;
            padding: 0 4px 0 15px;
            border: 0;
            outline: 0;
            color: var(--text);
            background: transparent;
            font-size: 13px;
        }

        .nav-search input::placeholder {
            color: #8b9aaf;
        }

        .search-button {
            display: grid;
            width: 38px;
            height: 38px;
            margin-right: 3px;
            flex: 0 0 auto;
            place-items: center;
            border: 0;
            border-radius: 50%;
            color: #fff;
            background: var(--primary);
            cursor: pointer;
        }

        .search-button:hover {
            background: var(--primary-dark);
            transform: scale(1.03);
        }

        .navbar-toggler {
            width: 44px;
            height: 44px;
            padding: 0;
            border: 1px solid var(--border);
            border-radius: 50%;
            box-shadow: none !important;
        }

        .navbar-toggler-icon {
            width: 20px;
            height: 20px;
        }

        main {
            overflow: hidden;
        }

        .section {
            position: relative;
            padding: 92px 0;
        }

        .section-sm {
            padding: 66px 0;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 850;
            letter-spacing: .08em;
        }

        .section-kicker::before {
            width: 22px;
            height: 3px;
            content: "";
            border-radius: 999px;
            background: var(--primary);
        }

        .section-title {
            max-width: 760px;
            margin: 0;
            color: var(--navy);
            font-size: clamp(30px, 4vw, 48px);
            font-weight: 900;
            line-height: 1.18;
            letter-spacing: -.04em;
        }

        .section-copy {
            max-width: 720px;
            margin: 18px 0 0;
            color: var(--muted);
            font-size: 17px;
        }

        .btn-site {
            display: inline-flex;
            min-height: 50px;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 12px 22px;
            border: 1px solid transparent;
            border-radius: 999px;
            font-weight: 800;
            line-height: 1.2;
            transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
        }

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

        .btn-primary-site {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 12px 26px rgba(36, 104, 216, .28);
        }

        .btn-primary-site:hover {
            color: #fff;
            background: var(--primary-dark);
            box-shadow: 0 16px 32px rgba(36, 104, 216, .34);
        }

        .btn-light-site {
            color: var(--navy);
            background: #fff;
            border-color: rgba(255,255,255,.35);
            box-shadow: 0 10px 26px rgba(0,0,0,.14);
        }

        .btn-light-site:hover {
            color: var(--primary-dark);
            background: #f4f8ff;
        }

        .btn-outline-site {
            color: var(--primary-dark);
            border-color: #bdd2ec;
            background: rgba(255,255,255,.78);
        }

        .btn-outline-site:hover {
            color: #fff;
            border-color: var(--primary);
            background: var(--primary);
        }

        .hero-section {
            padding: 42px 0 78px;
        }

        .hero-panel {
            position: relative;
            min-height: 580px;
            overflow: hidden;
            border: 1px solid rgba(255,255,255,.1);
            border-radius: 38px;
            color: #fff;
            background:
                linear-gradient(110deg, rgba(11,31,58,.97), rgba(16,47,93,.94)),
                var(--navy);
            box-shadow: var(--shadow-lg);
        }

        .hero-panel::before {
            position: absolute;
            top: -190px;
            right: -90px;
            width: 520px;
            height: 520px;
            content: "";
            border: 1px solid rgba(85,200,232,.22);
            border-radius: 50%;
            box-shadow: 0 0 0 55px rgba(85,200,232,.04), 0 0 0 115px rgba(85,200,232,.025);
        }

        .hero-panel::after {
            position: absolute;
            bottom: -130px;
            left: 28%;
            width: 380px;
            height: 280px;
            content: "";
            border-radius: 50%;
            background: rgba(36,104,216,.23);
            filter: blur(70px);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            height: 100%;
            padding: clamp(34px, 6vw, 74px);
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 20px;
            padding: 7px 12px;
            border: 1px solid rgba(255,255,255,.14);
            border-radius: 999px;
            color: #dcecff;
            background: rgba(255,255,255,.07);
            font-size: 13px;
            font-weight: 750;
        }

        .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 0 6px rgba(85,200,232,.12);
        }

        .hero-title {
            max-width: 650px;
            margin: 0;
            font-size: clamp(42px, 6vw, 76px);
            font-weight: 950;
            line-height: 1.08;
            letter-spacing: -.055em;
        }

        .hero-description {
            max-width: 640px;
            margin: 24px 0 0;
            color: #c8d8ed;
            font-size: clamp(16px, 2vw, 19px);
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 32px;
        }

        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 26px;
            margin-top: 36px;
        }

        .hero-metric {
            min-width: 112px;
        }

        .hero-metric strong {
            display: block;
            color: #fff;
            font-size: 24px;
            font-weight: 900;
        }

        .hero-metric span {
            color: #90a9c8;
            font-size: 13px;
        }

        .rank-panel {
            position: relative;
            padding: 26px;
            border: 1px solid rgba(255,255,255,.13);
            border-radius: 26px;
            background: rgba(255,255,255,.075);
            box-shadow: inset 0 1px rgba(255,255,255,.08);
            backdrop-filter: blur(13px);
        }

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

        .rank-heading h2 {
            margin: 0;
            font-size: 19px;
            font-weight: 850;
        }

        .live-badge {
            padding: 5px 9px;
            border-radius: 999px;
            color: #9de6d0;
            background: rgba(29,154,108,.18);
            font-size: 11px;
            font-weight: 850;
        }

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

        .rank-item {
            display: grid;
            grid-template-columns: 34px 1fr auto;
            align-items: center;
            gap: 12px;
            padding: 14px;
            border: 1px solid rgba(255,255,255,.08);
            border-radius: 17px;
            background: rgba(5,20,40,.34);
        }

        .rank-number {
            display: grid;
            width: 30px;
            height: 30px;
            place-items: center;
            border-radius: 10px;
            color: #fff;
            background: rgba(85,200,232,.16);
            font-size: 12px;
            font-weight: 900;
        }

        .rank-item:first-child .rank-number {
            color: var(--navy);
            background: var(--accent);
        }

        .rank-name {
            min-width: 0;
        }

        .rank-name strong {
            display: block;
            overflow: hidden;
            color: #f4f8ff;
            font-size: 14px;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .rank-name small {
            color: #8ea6c4;
            font-size: 12px;
        }

        .rank-trend {
            color: #8ee4c8;
            font-size: 12px;
            font-weight: 800;
        }

        .rank-note {
            margin: 16px 0 0;
            color: #8ea6c4;
            font-size: 12px;
        }

        .offer-section {
            padding-top: 72px;
        }

        .offer-track {
            display: flex;
            gap: 18px;
            margin-top: 36px;
            padding: 8px 4px 22px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            scrollbar-color: #bdd2ec transparent;
        }

        .offer-track::-webkit-scrollbar {
            height: 7px;
        }

        .offer-track::-webkit-scrollbar-thumb {
            border-radius: 999px;
            background: #bdd2ec;
        }

        .offer-card {
            position: relative;
            min-width: 300px;
            max-width: 360px;
            flex: 1 0 30%;
            overflow: hidden;
            scroll-snap-align: start;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: var(--surface);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .offer-card:hover {
            z-index: 2;
            border-color: #b9d0ec;
            box-shadow: var(--shadow-md);
            transform: translateY(-7px);
        }

        .offer-top {
            min-height: 145px;
            padding: 24px;
            background:
                radial-gradient(circle at 95% 0, rgba(85,200,232,.25), transparent 8rem),
                linear-gradient(145deg, #f0f6ff, #fff);
        }

        .offer-card.featured {
            border-color: #8fb9ed;
        }

        .offer-card.featured .offer-top {
            color: #fff;
            background:
                radial-gradient(circle at 95% 0, rgba(85,200,232,.28), transparent 9rem),
                linear-gradient(145deg, var(--primary-dark), var(--navy));
        }

        .offer-label {
            display: inline-flex;
            padding: 5px 10px;
            border-radius: 999px;
            color: var(--primary-dark);
            background: var(--primary-soft);
            font-size: 12px;
            font-weight: 850;
        }

        .featured .offer-label {
            color: #dcecff;
            background: rgba(255,255,255,.12);
        }

        .offer-top h3 {
            margin: 20px 0 6px;
            font-size: 23px;
            font-weight: 900;
        }

        .offer-top p {
            margin: 0;
            color: var(--muted);
            font-size: 14px;
        }

        .featured .offer-top p {
            color: #b9cce4;
        }

        .offer-body {
            padding: 24px;
        }

        .price-line {
            display: flex;
            align-items: end;
            gap: 5px;
            margin-bottom: 18px;
        }

        .price-line strong {
            color: var(--navy);
            font-size: 34px;
            font-weight: 950;
            line-height: 1;
        }

        .price-line span {
            color: var(--muted);
            font-size: 13px;
        }

        .feature-list {
            display: grid;
            gap: 12px;
            margin: 0 0 22px;
            padding: 0;
            list-style: none;
        }

        .feature-list li {
            position: relative;
            padding-left: 24px;
            color: #455a74;
            font-size: 14px;
        }

        .feature-list li::before {
            position: absolute;
            top: .52em;
            left: 0;
            width: 8px;
            height: 8px;
            content: "";
            border: 2px solid var(--primary);
            border-radius: 50%;
            box-shadow: 0 0 0 4px var(--primary-soft);
        }

        .offer-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary-dark);
            font-size: 14px;
            font-weight: 850;
        }

        .offer-link:hover {
            gap: 12px;
            color: var(--primary);
        }

        .availability-section {
            padding: 48px 0;
        }

        .availability-box {
            display: grid;
            grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
            gap: 42px;
            align-items: center;
            padding: 42px;
            border: 1px solid #cfe0f1;
            border-radius: var(--radius-lg);
            background: rgba(255,255,255,.88);
            box-shadow: var(--shadow-sm);
        }

        .availability-box h2 {
            margin: 0 0 12px;
            color: var(--navy);
            font-size: clamp(27px, 3vw, 38px);
            font-weight: 900;
        }

        .availability-box p {
            margin: 0;
            color: var(--muted);
        }

        .capacity-panel {
            padding: 24px;
            border-radius: 20px;
            background: var(--surface-soft);
        }

        .capacity-head {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 12px;
            font-size: 14px;
            font-weight: 800;
        }

        .capacity-head span:last-child {
            color: var(--success);
        }

        .capacity-bar {
            height: 10px;
            overflow: hidden;
            border-radius: 999px;
            background: #d7e4f1;
        }

        .capacity-bar span {
            display: block;
            width: 68%;
            height: 100%;
            border-radius: inherit;
            background: linear-gradient(90deg, var(--primary), var(--cyan));
        }

        .capacity-foot {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 12px;
            color: var(--muted);
            font-size: 12px;
        }

        .info-section {
            background: linear-gradient(180deg, rgba(232,241,251,.65), rgba(244,248,253,.2));
        }

        .info-layout {
            display: grid;
            grid-template-columns: minmax(0, 1.55fr) minmax(280px, .75fr);
            gap: 26px;
            margin-top: 36px;
        }

        .news-list {
            overflow: hidden;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .news-item {
            display: grid;
            grid-template-columns: 92px 1fr auto;
            gap: 20px;
            align-items: center;
            min-height: 112px;
            padding: 22px 24px;
            border-bottom: 1px solid var(--border);
        }

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

        .news-item:hover {
            background: #f7faff;
        }

        .news-date {
            color: var(--muted);
            font-size: 13px;
        }

        .news-content h3 {
            margin: 0 0 5px;
            color: var(--navy);
            font-size: 17px;
            font-weight: 850;
        }

        .news-content p {
            margin: 0;
            color: var(--muted);
            font-size: 13px;
        }

        .news-arrow {
            display: grid;
            width: 38px;
            height: 38px;
            place-items: center;
            border-radius: 50%;
            color: var(--primary);
            background: var(--primary-soft);
            font-weight: 900;
        }

        .news-item:hover .news-arrow {
            color: #fff;
            background: var(--primary);
            transform: translateX(3px);
        }

        .recommend-panel {
            display: flex;
            min-height: 100%;
            flex-direction: column;
            justify-content: space-between;
            padding: 30px;
            border-radius: var(--radius-md);
            color: #fff;
            background:
                radial-gradient(circle at 100% 0, rgba(85,200,232,.3), transparent 12rem),
                var(--navy);
            box-shadow: var(--shadow-md);
        }

        .recommend-panel .offer-label {
            align-self: flex-start;
            color: #dcecff;
            background: rgba(255,255,255,.1);
        }

        .recommend-panel h3 {
            margin: 26px 0 12px;
            font-size: 28px;
            font-weight: 900;
            line-height: 1.3;
        }

        .recommend-panel p {
            margin: 0;
            color: #b8cae0;
            font-size: 14px;
        }

        .recommend-meta {
            display: flex;
            gap: 22px;
            margin: 28px 0;
        }

        .recommend-meta strong {
            display: block;
            font-size: 22px;
        }

        .recommend-meta span {
            color: #91a8c5;
            font-size: 12px;
        }

        .action-section {
            padding: 64px 0;
        }

        .action-box {
            position: relative;
            overflow: hidden;
            padding: 50px;
            border: 1px solid #cbdcf0;
            border-radius: var(--radius-lg);
            background:
                radial-gradient(circle at 10% 100%, rgba(85,200,232,.18), transparent 18rem),
                #fff;
            box-shadow: var(--shadow-md);
        }

        .action-box::after {
            position: absolute;
            top: -65px;
            right: -40px;
            width: 210px;
            height: 210px;
            content: "";
            border: 40px solid var(--primary-soft);
            border-radius: 50%;
        }

        .action-content {
            position: relative;
            z-index: 2;
            max-width: 770px;
        }

        .action-box h2 {
            margin: 0;
            color: var(--navy);
            font-size: clamp(30px, 4vw, 45px);
            font-weight: 900;
        }

        .action-box p {
            max-width: 690px;
            margin: 16px 0 0;
            color: var(--muted);
        }

        .action-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 28px;
        }

        .trust-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            margin-top: 28px;
            color: #53677f;
            font-size: 13px;
            font-weight: 700;
        }

        .trust-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .trust-item::before {
            display: grid;
            width: 20px;
            height: 20px;
            content: "✓";
            place-items: center;
            border-radius: 50%;
            color: var(--success);
            background: #e7f7f1;
            font-size: 11px;
            font-weight: 950;
        }

        .experience-section {
            padding-top: 82px;
        }

        .experience-grid {
            display: grid;
            grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
            gap: 28px;
            margin-top: 38px;
        }

        .steps-card, .proof-card {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .steps-card {
            padding: 34px;
        }

        .steps-card h3, .proof-card h3 {
            margin: 0;
            color: var(--navy);
            font-size: 23px;
            font-weight: 900;
        }

        .steps {
            display: grid;
            gap: 8px;
            margin-top: 24px;
        }

        .step {
            display: grid;
            grid-template-columns: 46px 1fr;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px dashed #d6e1ed;
        }

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

        .step-number {
            display: grid;
            width: 42px;
            height: 42px;
            place-items: center;
            border-radius: 14px;
            color: var(--primary-dark);
            background: var(--primary-soft);
            font-size: 13px;
            font-weight: 950;
        }

        .step h4 {
            margin: 0 0 4px;
            font-size: 16px;
            font-weight: 850;
        }

        .step p {
            margin: 0;
            color: var(--muted);
            font-size: 13px;
        }

        .proof-card {
            overflow: hidden;
        }

        .proof-top {
            padding: 34px;
            color: #fff;
            background:
                radial-gradient(circle at 90% 5%, rgba(85,200,232,.28), transparent 12rem),
                linear-gradient(145deg, var(--navy-2), var(--navy));
        }

        .proof-top h3 {
            color: #fff;
        }

        .proof-top p {
            margin: 10px 0 0;
            color: #b7cae1;
            font-size: 14px;
        }

        .proof-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            margin-top: 26px;
            overflow: hidden;
            border: 1px solid rgba(255,255,255,.12);
            border-radius: 17px;
        }

        .proof-metric {
            padding: 17px 10px;
            text-align: center;
            border-right: 1px solid rgba(255,255,255,.12);
        }

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

        .proof-metric strong {
            display: block;
            font-size: 22px;
            font-weight: 900;
        }

        .proof-metric span {
            color: #91aac8;
            font-size: 11px;
        }

        .quote-list {
            display: grid;
            gap: 0;
        }

        .quote-item {
            padding: 20px 28px;
            border-bottom: 1px solid var(--border);
        }

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

        .quote-item p {
            margin: 0 0 9px;
            color: #43566f;
            font-size: 14px;
        }

        .quote-item span {
            color: var(--muted);
            font-size: 12px;
            font-weight: 700;
        }

        .faq-section {
            padding-bottom: 104px;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: minmax(260px, .7fr) minmax(0, 1.3fr);
            gap: 48px;
            margin-top: 38px;
            align-items: start;
        }

        .faq-aside {
            position: sticky;
            top: 24px;
            padding: 30px;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .faq-aside strong {
            display: block;
            color: var(--navy);
            font-size: 21px;
            font-weight: 900;
        }

        .faq-aside p {
            margin: 10px 0 20px;
            color: var(--muted);
            font-size: 14px;
        }

        .accordion {
            display: grid;
            gap: 13px;
        }

        .accordion-item {
            overflow: hidden;
            border: 1px solid var(--border) !important;
            border-radius: 18px !important;
            background: #fff;
            box-shadow: 0 8px 22px rgba(25,67,117,.06);
        }

        .accordion-button {
            padding: 21px 24px;
            color: var(--navy);
            background: #fff;
            font-weight: 850;
            box-shadow: none !important;
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary-dark);
            background: #f5f9ff;
        }

        .accordion-button::after {
            width: 18px;
            height: 18px;
            background-size: 18px;
        }

        .accordion-body {
            padding: 0 24px 23px;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.9;
        }

        .site-footer {
            color: #c5d2e2;
            background: var(--navy);
        }

        .footer-main {
            display: grid;
            grid-template-columns: 1.4fr .6fr;
            gap: 50px;
            padding: 62px 0 42px;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: #fff;
            font-size: 20px;
            font-weight: 900;
        }

        .footer-copy {
            max-width: 630px;
            margin: 18px 0 0;
            color: #92a7c0;
            font-size: 14px;
        }

        .footer-notice {
            display: inline-flex;
            margin-top: 20px;
            padding: 8px 12px;
            border: 1px solid rgba(255,255,255,.1);
            border-radius: 999px;
            color: #bfd0e3;
            background: rgba(255,255,255,.05);
            font-size: 12px;
        }

        .footer-links h2 {
            margin: 0 0 15px;
            color: #fff;
            font-size: 15px;
            font-weight: 850;
        }

        .footer-links nav {
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            color: #92a7c0;
            font-size: 14px;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding: 22px 0 28px;
            border-top: 1px solid rgba(255,255,255,.09);
            color: #7f95ae;
            font-size: 12px;
        }

        @media (max-width: 1024px) {
            .site-container {
                width: min(100% - 32px, 940px);
            }

            .nav-search {
                width: 190px;
            }

            .hero-content {
                padding: 52px;
            }

            .hero-title {
                font-size: clamp(42px, 7vw, 64px);
            }

            .availability-box,
            .experience-grid {
                grid-template-columns: 1fr;
            }

            .info-layout {
                grid-template-columns: 1.25fr .75fr;
            }

            .faq-layout {
                grid-template-columns: .75fr 1.25fr;
                gap: 28px;
            }
        }

        @media (max-width: 991.98px) {
            .nav-shell {
                border-radius: 28px;
            }

            .navbar-collapse {
                margin-top: 12px;
                padding: 10px 4px 4px;
                border-top: 1px solid var(--border);
            }

            .navbar-nav {
                padding: 6px 0;
            }

            .navbar-nav .nav-link {
                border-radius: 13px;
            }

            .nav-search {
                width: 100%;
                margin: 7px 0 4px;
            }

            .hero-panel {
                min-height: auto;
            }

            .hero-content {
                padding: 48px;
            }

            .rank-panel {
                margin-top: 38px;
            }

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

            .faq-aside {
                position: static;
            }

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

        @media (max-width: 768px) {
            .section {
                padding: 72px 0;
            }

            .section-sm {
                padding: 52px 0;
            }

            .hero-section {
                padding: 28px 0 58px;
            }

            .hero-content {
                padding: 36px 28px;
            }

            .hero-panel {
                border-radius: 28px;
            }

            .hero-title {
                font-size: clamp(38px, 11vw, 55px);
            }

            .hero-description {
                font-size: 16px;
            }

            .offer-card {
                min-width: min(84vw, 330px);
            }

            .availability-box {
                gap: 28px;
                padding: 30px;
            }

            .news-item {
                grid-template-columns: 1fr auto;
                gap: 10px 16px;
            }

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

            .action-box {
                padding: 36px 28px;
            }

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

            .proof-metric {
                border-right: 0;
                border-bottom: 1px solid rgba(255,255,255,.12);
            }

            .proof-metric:last-child {
                border-bottom: 0;
            }

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

        @media (max-width: 520px) {
            .site-container {
                width: min(100% - 22px, 480px);
            }

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

            .nav-shell {
                min-height: 62px;
                padding: 7px 8px 7px 12px;
            }

            .brand-mark {
                width: 38px;
                height: 38px;
                border-radius: 12px;
            }

            .brand-text {
                max-width: 195px;
                font-size: 14px;
            }

            .hero-content {
                padding: 30px 20px;
            }

            .hero-panel {
                border-radius: 22px;
            }

            .hero-title {
                font-size: 39px;
            }

            .hero-actions,
            .action-buttons {
                display: grid;
            }

            .btn-site {
                width: 100%;
            }

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

            .rank-panel {
                padding: 20px 16px;
            }

            .rank-item {
                grid-template-columns: 30px minmax(0, 1fr);
            }

            .rank-trend {
                display: none;
            }

            .section-title {
                font-size: 31px;
            }

            .section-copy {
                font-size: 15px;
            }

            .availability-box,
            .steps-card,
            .proof-top,
            .faq-aside {
                padding: 24px 20px;
            }

            .capacity-foot {
                display: grid;
                gap: 3px;
            }

            .news-item {
                padding: 20px;
            }

            .news-content p {
                display: none;
            }

            .recommend-panel {
                padding: 24px;
            }

            .action-box::after {
                display: none;
            }

            .step {
                grid-template-columns: 40px 1fr;
                gap: 12px;
            }

            .accordion-button {
                padding: 19px;
                font-size: 15px;
            }

            .accordion-body {
                padding: 0 19px 20px;
            }

            .footer-main {
                padding-top: 48px;
            }
        }

/* roulang page: category1 */
:root {
      --primary:#2468d8;
      --primary-dark:#174ea6;
      --primary-soft:#eaf2ff;
      --navy:#0b1f3a;
      --navy-2:#102f5d;
      --cyan:#55c8e8;
      --accent:#ffb84d;
      --success:#1d9a6c;
      --danger:#e25555;
      --background:#f4f8fd;
      --surface:#fff;
      --surface-soft:#eef5fc;
      --text:#14233b;
      --muted:#63738a;
      --border:#dbe6f1;
      --radius-sm:12px;
      --radius-md:20px;
      --radius-lg:30px;
      --shadow-sm:0 8px 24px rgba(24,62,111,.08);
      --shadow-md:0 18px 48px rgba(20,58,105,.13);
      --shadow-lg:0 28px 72px rgba(3,21,48,.2);
      --transition:180ms ease;
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;color:var(--text);background:
      radial-gradient(circle at 8% 5%,rgba(85,200,232,.12),transparent 23rem),
      linear-gradient(180deg,#f8fbff 0%,var(--background) 52%,#f8fbff 100%);
      font-family:"Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased
    }
    a{color:inherit;text-decoration:none;transition:color var(--transition),background-color var(--transition),border-color var(--transition),transform var(--transition),box-shadow var(--transition)}
    button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}
    img,svg{display:block;max-width:100%}
    .site-container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .site-header{position:relative;z-index:1000;padding:18px 0 4px}
    .nav-shell{min-height:72px;padding:8px 10px 8px 18px;border:1px solid rgba(208,222,238,.92);border-radius:999px;background:rgba(255,255,255,.88);box-shadow:0 14px 38px rgba(25,67,117,.12);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
    .brand{display:inline-flex;align-items:center;gap:11px;min-width:0;color:var(--navy);font-weight:900;letter-spacing:-.03em}
    .brand:hover{color:var(--primary)}
    .brand-mark{position:relative;display:grid;width:42px;height:42px;flex:0 0 auto;place-items:center;overflow:hidden;border-radius:14px;color:#fff;background:linear-gradient(145deg,var(--primary),var(--navy-2));box-shadow:0 9px 20px rgba(36,104,216,.25)}
    .brand-mark::after{position:absolute;width:16px;height:16px;content:"";border:4px solid rgba(255,255,255,.9);border-left-color:transparent;border-radius:50%}
    .brand-text{overflow:hidden;font-size:17px;text-overflow:ellipsis;white-space:nowrap}
    .navbar-nav{gap:5px}.navbar-nav .nav-link{padding:10px 17px!important;border-radius:999px;color:#4d6079;font-size:14px;font-weight:750}
    .navbar-nav .nav-link:hover{color:var(--primary-dark);background:var(--primary-soft)}
    .navbar-nav .nav-link.active{color:#fff;background:var(--navy);box-shadow:0 7px 18px rgba(11,31,58,.18)}
    .nav-search{display:flex;align-items:center;width:225px;height:44px;margin-left:10px;overflow:hidden;border:1px solid var(--border);border-radius:999px;background:#f7faff}
    .nav-search input{width:100%;min-width:0;padding:0 4px 0 15px;border:0;outline:0;color:var(--text);background:transparent;font-size:13px}
    .nav-search input::placeholder{color:#8b9aaf}
    .search-button{display:grid;width:38px;height:38px;margin-right:3px;flex:0 0 auto;place-items:center;border:0;border-radius:50%;color:#fff;background:var(--primary);cursor:pointer}
    .search-button:hover{background:var(--primary-dark);transform:scale(1.03)}
    .navbar-toggler{width:44px;height:44px;padding:0;border:1px solid var(--border);border-radius:50%;box-shadow:none!important}
    .navbar-toggler-icon{width:20px;height:20px}
    main{overflow:hidden}
    .section{position:relative;padding:92px 0}.section-sm{padding:66px 0}
    .section-kicker{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;color:var(--primary-dark);font-size:13px;font-weight:850;letter-spacing:.08em}
    .section-kicker::before{width:22px;height:3px;content:"";border-radius:999px;background:var(--primary)}
    h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--navy);font-weight:900;letter-spacing:-.045em}
    h1{font-size:clamp(2.5rem,5vw,4.8rem);line-height:1.08}
    h2{font-size:clamp(2rem,3.5vw,3.15rem);line-height:1.2}
    h3{font-size:1.2rem;line-height:1.4}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border:1px solid #cfe0f6;border-radius:999px;color:var(--primary-dark);background:rgba(255,255,255,.75);font-size:13px;font-weight:800}
    .hero{padding:70px 0 74px}
    .hero-copy{max-width:720px}.hero-copy p{max-width:650px;margin:24px 0 30px;color:var(--muted);font-size:18px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px}
    .btn-main,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:14px;font-weight:800;border:1px solid transparent}
    .btn-main{color:#fff;background:var(--primary);box-shadow:0 12px 24px rgba(36,104,216,.22)}
    .btn-main:hover{color:#fff;background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 16px 28px rgba(36,104,216,.28)}
    .btn-ghost{color:var(--navy);border-color:var(--border);background:#fff}
    .btn-ghost:hover{color:var(--primary-dark);border-color:#b8d0ef;background:var(--primary-soft)}
    .btn-main:focus-visible,.btn-ghost:focus-visible,.nav-link:focus-visible,.search-button:focus-visible{outline:3px solid rgba(85,200,232,.65);outline-offset:3px}
    .hero-panel{position:relative;min-height:350px;padding:28px;border-radius:var(--radius-lg);color:#fff;background:linear-gradient(145deg,var(--navy),#174b88);box-shadow:var(--shadow-lg);overflow:hidden}
    .hero-panel::before,.hero-panel::after{position:absolute;content:"";border:1px solid rgba(255,255,255,.12);border-radius:50%}
    .hero-panel::before{width:280px;height:280px;right:-80px;top:-90px}.hero-panel::after{width:190px;height:190px;left:-95px;bottom:-100px}
    .panel-top{position:relative;z-index:1;display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
    .panel-label{color:#b8d9ff;font-size:13px;font-weight:800;letter-spacing:.08em}
    .status-dot{width:10px;height:10px;margin-top:5px;border-radius:50%;background:#6fe0ba;box-shadow:0 0 0 6px rgba(111,224,186,.13)}
    .countdown{position:relative;z-index:1;display:flex;align-items:center;gap:20px;margin:40px 0 28px}
    .count-ring{display:grid;width:142px;height:142px;place-items:center;border:10px solid rgba(255,255,255,.16);border-top-color:var(--cyan);border-right-color:var(--accent);border-radius:50%;transform:rotate(-24deg)}
    .count-ring span{display:block;text-align:center;transform:rotate(24deg)}.count-ring strong{display:block;font-size:34px;line-height:1}.count-ring small{color:#c2d7f2;font-size:12px}
    .panel-copy h2{margin-bottom:8px;color:#fff;font-size:24px}.panel-copy p{margin:0;color:#bed0e8;font-size:14px}
    .dot-row{position:relative;z-index:1;display:flex;gap:8px;margin-top:24px}.dot-row span{width:28px;height:5px;border-radius:10px;background:rgba(255,255,255,.28)}.dot-row span.active{background:var(--accent)}
    .intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:end}
    .lead{color:var(--muted);font-size:18px}.quiet-note{padding:24px;border-left:4px solid var(--cyan);border-radius:0 var(--radius-md) var(--radius-md) 0;background:#fff;box-shadow:var(--shadow-sm);color:var(--muted)}
    .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}
    .feature-card,.scene-card,.story-card,.offer-card{height:100%;padding:28px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);box-shadow:var(--shadow-sm);transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition)}
    .feature-card:hover,.scene-card:hover,.story-card:hover,.offer-card:hover{transform:translateY(-5px);border-color:#b6d0ef;box-shadow:var(--shadow-md)}
    .icon-box{display:grid;width:46px;height:46px;margin-bottom:23px;place-items:center;border-radius:14px;color:var(--primary-dark);background:var(--primary-soft);font-weight:900}
    .feature-card p,.scene-card p,.story-card p,.offer-card p{margin-bottom:0;color:var(--muted);font-size:15px}
    .split-section{background:rgba(238,245,252,.7)}
    .split-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:58px;align-items:center}
    .number-list{display:grid;gap:13px}.number-item{display:flex;gap:16px;align-items:flex-start;padding:18px;border:1px solid var(--border);border-radius:16px;background:#fff}
    .number{display:grid;width:32px;height:32px;flex:0 0 auto;place-items:center;border-radius:10px;color:#fff;background:var(--primary);font-weight:900}.number-item strong{display:block;color:var(--navy)}.number-item span{display:block;color:var(--muted);font-size:14px}
    .scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:36px}.scene-card:nth-child(2){margin-top:28px}.scene-card:nth-child(3){margin-top:-8px}
    .scene-tag,.mini-tag{display:inline-flex;padding:5px 10px;border-radius:999px;color:var(--primary-dark);background:var(--primary-soft);font-size:12px;font-weight:800}
    .scene-card h3{margin:19px 0 8px}
    .story-layout{display:grid;grid-template-columns:1fr 1.15fr;gap:24px;align-items:stretch;margin-top:38px}
    .story-feature{padding:36px;border-radius:var(--radius-lg);color:#fff;background:linear-gradient(145deg,#16437d,#2468d8);box-shadow:var(--shadow-md)}
    .story-feature h3{color:#fff;font-size:27px}.story-feature p{color:#d7e7fb}.story-feature .mini-tag{color:#fff;background:rgba(255,255,255,.16)}
    .story-list{display:grid;gap:14px}.story-card{display:flex;gap:17px;align-items:flex-start;padding:22px}.story-card .icon-box{margin:0}
    .offers{background:var(--navy)}.offers h2,.offers .section-kicker{color:#fff}.offers .section-kicker::before{background:var(--accent)}.offers-intro{max-width:650px;color:#b9cbe3}
    .offer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:36px}.offer-card{position:relative}.offer-card.featured{border:2px solid var(--accent);transform:translateY(-10px)}.offer-card.featured:hover{transform:translateY(-15px)}
    .offer-card h3{margin:17px 0 8px}.price{margin:13px 0;color:var(--navy);font-size:30px;font-weight:900}.price small{color:var(--muted);font-size:13px;font-weight:500}.offer-list{display:grid;gap:9px;margin:20px 0 25px;padding:0;list-style:none;color:var(--muted);font-size:14px}.offer-list li::before{content:"✓";margin-right:8px;color:var(--success);font-weight:900}
    .faq-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:55px}.faq-title p{color:var(--muted)}.accordion-item{margin-bottom:12px;border:1px solid var(--border)!important;border-radius:15px!important;overflow:hidden;background:#fff;box-shadow:var(--shadow-sm)}.accordion-button{padding:20px 22px;color:var(--navy);background:#fff;font-weight:800;box-shadow:none!important}.accordion-button:not(.collapsed){color:var(--primary-dark);background:var(--primary-soft)}.accordion-body{padding:0 22px 20px;color:var(--muted);font-size:15px}
    .cta{padding:42px 48px;border-radius:var(--radius-lg);background:linear-gradient(115deg,#eaf2ff,#fff);border:1px solid #d2e2f5}.cta-wrap{display:flex;align-items:center;justify-content:space-between;gap:28px}.cta h2{margin-bottom:10px;font-size:30px}.cta p{margin:0;color:var(--muted)}
    .site-footer{padding:64px 0 22px;color:#aebfd5;background:var(--navy)}.footer-main{display:grid;grid-template-columns:1.35fr .7fr .85fr 1.2fr;gap:38px}.footer-brand .brand{color:#fff}.footer-brand p{max-width:310px;margin:20px 0 0;color:#aebfd5;font-size:14px}.footer-column{display:flex;flex-direction:column;gap:9px;font-size:14px}.footer-column h3{margin:0 0 9px;color:#fff;font-size:15px;letter-spacing:0}.footer-column a:hover{color:#fff}.footer-contact p{margin:0;font-size:14px}.footer-bottom{display:flex;justify-content:space-between;gap:18px;margin-top:48px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);font-size:12px}
    @media(max-width:991px){.nav-search{width:100%;margin:12px 0 5px}.navbar-nav{align-items:stretch!important;margin-top:10px}.intro-grid,.split-grid,.story-layout,.faq-grid{grid-template-columns:1fr;gap:30px}.footer-main{grid-template-columns:1fr 1fr}.hero{padding-top:45px}}
    @media(max-width:767px){.site-container{width:min(100% - 28px,1180px)}.nav-shell{border-radius:25px;padding-left:14px}.brand-text{font-size:15px}.hero{padding:38px 0 52px}h1{font-size:2.55rem}.hero-copy p{font-size:16px}.hero-panel{margin-top:12px}.feature-grid,.offer-grid{grid-template-columns:1fr}.scene-grid{grid-template-columns:1fr}.scene-card:nth-child(2),.scene-card:nth-child(3){margin-top:0}.offer-card.featured{transform:none}.section{padding:66px 0}.section-sm{padding:48px 0}.cta{padding:30px 24px}.cta-wrap{display:block}.cta .btn-main{margin-top:22px}.footer-main{grid-template-columns:1fr 1fr;gap:28px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}}
    @media(max-width:520px){.hero-actions{display:grid}.hero-actions a{width:100%}.countdown{gap:13px}.count-ring{width:116px;height:116px}.count-ring strong{font-size:28px}.panel-copy h2{font-size:20px}.footer-main{grid-template-columns:1fr}.footer-contact{grid-column:auto}}