/* roulang page: index */
:root {
            --primary: #1864ff;
            --primary-dark: #0b48c7;
            --primary-soft: #eaf1ff;
            --secondary: #19b6d2;
            --accent: #ff6b35;
            --accent-soft: #fff1ea;
            --success: #16a873;
            --ink: #101828;
            --text: #344054;
            --muted: #667085;
            --light: #f7faff;
            --surface: #ffffff;
            --line: #dbe5f5;
            --line-soft: rgba(24, 100, 255, .14);
            --shadow-sm: 0 10px 24px rgba(16, 24, 40, .08);
            --shadow-md: 0 18px 46px rgba(16, 24, 40, .12);
            --shadow-lg: 0 26px 70px rgba(24, 100, 255, .18);
            --radius-sm: 12px;
            --radius: 18px;
            --radius-lg: 28px;
            --radius-xl: 36px;
            --container: 1160px;
            --nav-height: 78px;
            --ease: all .22s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
            color: var(--text);
            background:
                radial-gradient(circle at 8% 5%, rgba(24,100,255,.08) 0, rgba(24,100,255,0) 34%),
                radial-gradient(circle at 86% 14%, rgba(25,182,210,.11) 0, rgba(25,182,210,0) 28%),
                linear-gradient(180deg, #fbfdff 0%, #f6f9ff 48%, #ffffff 100%);
            line-height: 1.72;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--ease);
        }

        a:hover {
            color: var(--primary);
        }

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

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

        ::selection {
            background: rgba(24, 100, 255, .18);
            color: var(--ink);
        }

        .container-custom {
            width: min(100% - 32px, var(--container));
            margin-inline: auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            min-height: var(--nav-height);
            background: rgba(255, 255, 255, .88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(219, 229, 245, .88);
            box-shadow: 0 12px 32px rgba(16, 24, 40, .04);
        }

        .navbar {
            padding: 14px 0;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--ink);
            font-weight: 900;
            letter-spacing: -.02em;
            font-size: 1.22rem;
        }

        .brand-mark {
            width: 42px;
            height: 42px;
            border-radius: 14px;
            display: inline-grid;
            place-items: center;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            box-shadow: 0 12px 26px rgba(24, 100, 255, .24);
            font-weight: 900;
        }

        .navbar-toggler {
            border: 1px solid var(--line);
            border-radius: 14px;
            padding: 10px 12px;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 4px rgba(24, 100, 255, .14);
        }

        .nav-link {
            color: var(--muted);
            font-weight: 700;
            padding: 10px 14px !important;
            border-radius: 999px;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: 16px;
        }

        .btn-modern {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 0;
            border-radius: 999px;
            padding: 12px 20px;
            font-weight: 800;
            line-height: 1.2;
            transition: var(--ease);
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-modern:focus-visible,
        .form-control:focus,
        .form-select:focus {
            outline: none;
            box-shadow: 0 0 0 4px rgba(24, 100, 255, .14);
            border-color: rgba(24, 100, 255, .45);
        }

        .btn-primary-modern {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 16px 32px rgba(24, 100, 255, .28);
        }

        .btn-primary-modern:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 20px 42px rgba(24, 100, 255, .34);
        }

        .btn-secondary-modern {
            color: var(--primary-dark);
            background: #fff;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
        }

        .btn-secondary-modern:hover {
            color: var(--primary);
            border-color: rgba(24, 100, 255, .28);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-accent-modern {
            color: #fff;
            background: linear-gradient(135deg, #ff7a3d, #ff3d6e);
            box-shadow: 0 16px 36px rgba(255, 107, 53, .28);
        }

        .btn-accent-modern:hover {
            color: #fff;
            transform: translateY(-2px) scale(1.01);
            box-shadow: 0 22px 48px rgba(255, 107, 53, .34);
        }

        .section {
            padding: 84px 0;
        }

        .section-tight {
            padding: 58px 0;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 12px;
            border-radius: 999px;
            background: var(--primary-soft);
            color: var(--primary-dark);
            font-size: .88rem;
            font-weight: 900;
            margin-bottom: 14px;
        }

        .section-title {
            color: var(--ink);
            font-size: clamp(2rem, 4vw, 3.2rem);
            line-height: 1.14;
            letter-spacing: -.045em;
            font-weight: 950;
            margin: 0 0 16px;
        }

        .section-lead {
            color: var(--muted);
            font-size: 1.05rem;
            max-width: 780px;
            margin: 0;
        }

        .hero {
            padding: 36px 0 72px;
        }

        .hero-promo {
            position: relative;
            overflow: hidden;
            min-height: 560px;
            border-radius: var(--radius-xl);
            background:
                linear-gradient(115deg, rgba(8, 39, 102, .98) 0%, rgba(15, 78, 178, .95) 46%, rgba(25, 182, 210, .72) 100%),
                radial-gradient(circle at 80% 18%, rgba(255,255,255,.28), transparent 28%);
            box-shadow: var(--shadow-lg);
            color: #fff;
            padding: clamp(30px, 6vw, 64px);
        }

        .hero-promo::before {
            content: "";
            position: absolute;
            inset: auto -80px -140px auto;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .10);
            filter: blur(2px);
        }

        .hero-promo::after {
            content: "";
            position: absolute;
            left: -90px;
            top: -90px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
        }

        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr);
            gap: 40px;
            align-items: center;
        }

        .promo-ribbon {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 26px;
        }

        .promo-badge,
        .hot-burst {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-radius: 999px;
            padding: 9px 14px;
            font-weight: 900;
            font-size: .92rem;
            background: rgba(255, 255, 255, .13);
            border: 1px solid rgba(255, 255, 255, .22);
            backdrop-filter: blur(10px);
        }

        .hot-burst {
            color: #161b2d;
            background: #fff;
            transform: rotate(-2deg);
            box-shadow: 0 12px 30px rgba(0, 0, 0, .16);
        }

        .hero h1 {
            font-size: clamp(2.45rem, 6vw, 5.5rem);
            line-height: .98;
            letter-spacing: -.07em;
            font-weight: 950;
            margin: 0 0 22px;
            max-width: 820px;
        }

        .hero-intro {
            max-width: 760px;
            color: rgba(255,255,255,.84);
            font-size: clamp(1rem, 2vw, 1.22rem);
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 30px;
        }

        .hero-data-row {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 12px;
            max-width: 720px;
        }

        .hero-data {
            border: 1px solid rgba(255, 255, 255, .16);
            background: rgba(255, 255, 255, .10);
            border-radius: 20px;
            padding: 16px;
            backdrop-filter: blur(12px);
        }

        .hero-data strong {
            display: block;
            color: #fff;
            font-size: 1.6rem;
            line-height: 1.1;
            font-weight: 950;
        }

        .hero-data span {
            display: block;
            color: rgba(255,255,255,.74);
            font-size: .9rem;
            margin-top: 4px;
        }

        .promo-stage {
            position: relative;
            min-height: 430px;
        }

        .stage-card {
            position: absolute;
            border-radius: 28px;
            background: rgba(255,255,255,.96);
            color: var(--ink);
            box-shadow: 0 30px 80px rgba(0, 22, 84, .24);
            border: 1px solid rgba(255,255,255,.6);
            overflow: hidden;
        }

        .stage-main {
            right: 0;
            top: 18px;
            width: min(100%, 360px);
            padding: 20px;
        }

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

        .stage-dots {
            display: flex;
            gap: 6px;
        }

        .stage-dots span {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--line);
        }

        .stage-dots span:nth-child(1) { background: #ff5a5f; }
        .stage-dots span:nth-child(2) { background: #ffc145; }
        .stage-dots span:nth-child(3) { background: #23c483; }

        .stage-rank {
            color: var(--primary);
            font-weight: 950;
            background: var(--primary-soft);
            padding: 5px 10px;
            border-radius: 999px;
            font-size: .85rem;
        }

        .visual-bars {
            display: grid;
            gap: 10px;
            margin-bottom: 20px;
        }

        .visual-bar {
            height: 42px;
            border-radius: 15px;
            background: linear-gradient(90deg, rgba(24,100,255,.16), rgba(25,182,210,.10));
            overflow: hidden;
            position: relative;
        }

        .visual-bar::after {
            content: "";
            position: absolute;
            inset: 0 auto 0 0;
            width: var(--w);
            border-radius: inherit;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }

        .stage-main h2 {
            font-size: 1.42rem;
            font-weight: 950;
            letter-spacing: -.03em;
            margin-bottom: 10px;
        }

        .stage-main p {
            margin: 0;
            color: var(--muted);
            font-size: .98rem;
        }

        .stage-side {
            left: 4px;
            bottom: 42px;
            width: 245px;
            padding: 18px;
            transform: rotate(-4deg);
        }

        .stage-side .num {
            font-size: 2.4rem;
            line-height: 1;
            font-weight: 950;
            color: var(--accent);
            letter-spacing: -.04em;
        }

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

        .stage-mini {
            right: 18px;
            bottom: 10px;
            width: 230px;
            padding: 16px;
            background: #101828;
            color: #fff;
        }

        .stage-mini span {
            color: rgba(255,255,255,.68);
            font-size: .88rem;
        }

        .stage-mini strong {
            display: block;
            font-size: 1.25rem;
            margin-top: 5px;
        }

        .countdown {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 12px;
            border-radius: 16px;
            background: rgba(255, 255, 255, .13);
            border: 1px solid rgba(255, 255, 255, .18);
            color: rgba(255,255,255,.92);
            font-weight: 800;
        }

        .countdown b {
            color: #fff;
            background: rgba(255,255,255,.16);
            border-radius: 10px;
            padding: 4px 7px;
            min-width: 34px;
            text-align: center;
        }

        .series-strip {
            display: grid;
            grid-template-columns: 1.1fr repeat(4, 1fr);
            gap: 16px;
            align-items: stretch;
        }

        .series-intro,
        .series-card,
        .content-card,
        .member-panel,
        .modern-card,
        .faq-card,
        .form-panel {
            background: rgba(255,255,255,.92);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
            border-radius: var(--radius-lg);
        }

        .series-intro {
            padding: 26px;
            background: linear-gradient(180deg, #fff, #eef5ff);
        }

        .series-intro h2,
        .card-title-custom {
            color: var(--ink);
            font-weight: 950;
            letter-spacing: -.035em;
            margin: 0 0 10px;
        }

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

        .series-card {
            padding: 22px;
            position: relative;
            overflow: hidden;
            min-height: 190px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .series-card::after {
            content: "";
            position: absolute;
            right: -34px;
            bottom: -34px;
            width: 110px;
            height: 110px;
            border-radius: 50%;
            background: var(--primary-soft);
            transition: var(--ease);
        }

        .series-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: rgba(24,100,255,.28);
        }

        .series-card:hover::after {
            transform: scale(1.18);
            background: rgba(24,100,255,.16);
        }

        .series-icon {
            width: 46px;
            height: 46px;
            display: grid;
            place-items: center;
            border-radius: 16px;
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 950;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .series-card h3 {
            color: var(--ink);
            font-size: 1.16rem;
            font-weight: 950;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }

        .series-card p {
            color: var(--muted);
            font-size: .95rem;
            margin: 0;
            position: relative;
            z-index: 1;
        }

        .hot-layout {
            display: grid;
            grid-template-columns: minmax(280px, .78fr) minmax(0, 1.22fr);
            gap: 22px;
            align-items: stretch;
            margin-top: 30px;
        }

        .hot-feature {
            position: relative;
            overflow: hidden;
            min-height: 430px;
            border-radius: var(--radius-xl);
            padding: 30px;
            color: #fff;
            background:
                linear-gradient(160deg, rgba(24,100,255,.95), rgba(7,32,88,.96)),
                radial-gradient(circle at 70% 20%, rgba(255,255,255,.2), transparent 38%);
            box-shadow: var(--shadow-lg);
        }

        .hot-feature .sticker {
            position: absolute;
            right: 24px;
            top: 24px;
            width: 96px;
            height: 96px;
            border-radius: 26px;
            display: grid;
            place-items: center;
            background: #fff;
            color: var(--accent);
            font-weight: 950;
            transform: rotate(8deg);
            box-shadow: 0 18px 45px rgba(0,0,0,.18);
        }

        .hot-feature h2 {
            margin-top: 96px;
            font-size: clamp(2rem, 4vw, 3.6rem);
            line-height: 1;
            font-weight: 950;
            letter-spacing: -.06em;
        }

        .hot-feature p {
            color: rgba(255,255,255,.78);
            margin: 16px 0 24px;
        }

        .hot-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 16px;
        }

        .hot-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 22px;
            box-shadow: var(--shadow-sm);
            transition: var(--ease);
            min-height: 207px;
        }

        .hot-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: rgba(24,100,255,.30);
        }

        .badge-soft {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary-dark);
            background: var(--primary-soft);
            border: 1px solid rgba(24,100,255,.12);
            border-radius: 999px;
            padding: 7px 10px;
            font-size: .84rem;
            font-weight: 900;
            margin-bottom: 14px;
        }

        .badge-accent {
            color: #a34212;
            background: var(--accent-soft);
            border-color: rgba(255,107,53,.18);
        }

        .hot-card h3 {
            color: var(--ink);
            font-weight: 950;
            font-size: 1.22rem;
            margin-bottom: 10px;
        }

        .hot-card p {
            color: var(--muted);
            margin-bottom: 18px;
            font-size: .96rem;
        }

        .mini-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            border-top: 1px dashed var(--line);
            padding-top: 14px;
            color: var(--muted);
            font-size: .9rem;
        }

        .mini-meta strong {
            color: var(--success);
            font-size: 1rem;
        }

        .news-layout {
            display: grid;
            grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
            gap: 24px;
            margin-top: 30px;
        }

        .news-list,
        .recommend-box {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 12px;
        }

        .news-item {
            display: grid;
            grid-template-columns: 98px minmax(0, 1fr) auto;
            gap: 18px;
            align-items: center;
            padding: 18px;
            border-radius: 20px;
            transition: var(--ease);
        }

        .news-item + .news-item {
            border-top: 1px solid rgba(219,229,245,.65);
        }

        .news-item:hover {
            background: var(--light);
            transform: translateX(4px);
        }

        .news-date {
            color: var(--primary);
            font-weight: 950;
            background: var(--primary-soft);
            border-radius: 16px;
            padding: 10px;
            text-align: center;
        }

        .news-date span {
            display: block;
            color: var(--muted);
            font-size: .78rem;
            font-weight: 800;
        }

        .news-title {
            color: var(--ink);
            font-weight: 950;
            margin-bottom: 4px;
            font-size: 1.06rem;
        }

        .news-desc {
            color: var(--muted);
            margin: 0;
            font-size: .94rem;
        }

        .news-arrow {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: grid;
            place-items: center;
            background: var(--light);
            color: var(--primary);
            font-weight: 950;
        }

        .recommend-box {
            padding: 24px;
        }

        .recommend-box h3 {
            color: var(--ink);
            font-weight: 950;
            margin-bottom: 16px;
        }

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

        .rank-list li {
            display: grid;
            grid-template-columns: 34px minmax(0,1fr);
            gap: 12px;
            align-items: start;
            padding: 13px;
            border-radius: 16px;
            background: var(--light);
            border: 1px solid rgba(219,229,245,.72);
        }

        .rank-num {
            width: 34px;
            height: 34px;
            border-radius: 12px;
            display: grid;
            place-items: center;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            font-weight: 950;
        }

        .rank-list strong {
            display: block;
            color: var(--ink);
            line-height: 1.35;
        }

        .rank-list span {
            display: block;
            color: var(--muted);
            font-size: .88rem;
            margin-top: 4px;
        }

        .member-wrap {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-xl);
            background:
                linear-gradient(135deg, #ffffff 0%, #eef5ff 100%);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-md);
            padding: clamp(26px, 5vw, 48px);
        }

        .member-grid {
            display: grid;
            grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
            gap: 26px;
            align-items: center;
        }

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

        .benefit-card {
            padding: 18px;
            border-radius: 22px;
            background: #fff;
            border: 1px solid var(--line);
            box-shadow: 0 12px 26px rgba(16,24,40,.06);
        }

        .benefit-card strong {
            display: block;
            color: var(--ink);
            font-size: 1.05rem;
            margin-bottom: 6px;
        }

        .benefit-card span {
            color: var(--muted);
            font-size: .94rem;
        }

        .material-grid {
            display: grid;
            grid-template-columns: .75fr 1.25fr;
            gap: 22px;
            margin-top: 30px;
        }

        .material-tall {
            min-height: 420px;
            padding: 28px;
            border-radius: var(--radius-xl);
            background: #101828;
            color: #fff;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .material-tall::after {
            content: "";
            position: absolute;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            right: -80px;
            bottom: -80px;
            background: rgba(25,182,210,.24);
        }

        .material-tall h2 {
            color: #fff;
            font-weight: 950;
            letter-spacing: -.04em;
            margin: 24px 0 12px;
        }

        .material-tall p {
            color: rgba(255,255,255,.72);
            margin: 0 0 24px;
        }

        .material-list {
            display: grid;
            gap: 14px;
        }

        .material-item {
            display: grid;
            grid-template-columns: 52px minmax(0,1fr) auto;
            gap: 16px;
            align-items: center;
            padding: 18px;
            border-radius: 22px;
            background: #fff;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
            transition: var(--ease);
        }

        .material-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .file-icon {
            width: 52px;
            height: 52px;
            border-radius: 18px;
            display: grid;
            place-items: center;
            color: var(--primary);
            background: var(--primary-soft);
            font-weight: 950;
        }

        .material-item h3 {
            color: var(--ink);
            font-size: 1.08rem;
            font-weight: 950;
            margin: 0 0 4px;
        }

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

        .compare-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 18px;
            margin-top: 30px;
        }

        .compare-card {
            padding: 26px;
            border-radius: var(--radius-lg);
            background: #fff;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
            transition: var(--ease);
        }

        .compare-card.featured {
            background: linear-gradient(180deg, #fff, #edf4ff);
            border-color: rgba(24,100,255,.24);
            box-shadow: var(--shadow-md);
            transform: translateY(-8px);
        }

        .compare-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .compare-card.featured:hover {
            transform: translateY(-10px);
        }

        .compare-card h3 {
            color: var(--ink);
            font-weight: 950;
            margin-bottom: 12px;
        }

        .compare-value {
            color: var(--primary);
            font-size: 2.6rem;
            line-height: 1;
            font-weight: 950;
            letter-spacing: -.05em;
            margin: 18px 0;
        }

        .check-list {
            list-style: none;
            padding: 0;
            margin: 18px 0 0;
            display: grid;
            gap: 10px;
        }

        .check-list li {
            position: relative;
            padding-left: 26px;
            color: var(--text);
            font-size: .96rem;
        }

        .check-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 0;
            color: var(--success);
            font-weight: 950;
        }

        .faq-wrap {
            display: grid;
            grid-template-columns: .85fr 1.15fr;
            gap: 26px;
            margin-top: 30px;
            align-items: start;
        }

        .faq-aside {
            position: sticky;
            top: 102px;
            padding: 28px;
            border-radius: var(--radius-xl);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: var(--shadow-lg);
        }

        .faq-aside h2 {
            font-weight: 950;
            letter-spacing: -.04em;
            margin-bottom: 12px;
        }

        .faq-aside p {
            color: rgba(255,255,255,.75);
            margin-bottom: 22px;
        }

        .accordion {
            display: grid;
            gap: 12px;
        }

        .accordion-item {
            border: 1px solid var(--line) !important;
            border-radius: 22px !important;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: #fff;
        }

        .accordion-button {
            color: var(--ink);
            font-weight: 950;
            padding: 20px 22px;
            border-radius: 22px !important;
            background: #fff;
            box-shadow: none !important;
        }

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

        .accordion-button:focus {
            box-shadow: 0 0 0 4px rgba(24,100,255,.12) !important;
        }

        .accordion-body {
            color: var(--muted);
            padding: 0 22px 22px;
        }

        .form-shell {
            display: grid;
            grid-template-columns: .85fr 1.15fr;
            gap: 24px;
            align-items: stretch;
            margin-top: 30px;
        }

        .contact-card {
            border-radius: var(--radius-xl);
            padding: 30px;
            color: #fff;
            background:
                linear-gradient(145deg, rgba(16,24,40,.96), rgba(24,100,255,.86)),
                radial-gradient(circle at 70% 15%, rgba(255,255,255,.20), transparent 30%);
            box-shadow: var(--shadow-lg);
        }

        .contact-card h2 {
            font-weight: 950;
            letter-spacing: -.04em;
            margin-bottom: 12px;
        }

        .contact-card p {
            color: rgba(255,255,255,.74);
        }

        .contact-steps {
            margin-top: 24px;
            display: grid;
            gap: 12px;
        }

        .contact-step {
            display: grid;
            grid-template-columns: 36px minmax(0,1fr);
            gap: 12px;
            align-items: start;
            padding: 14px;
            border-radius: 18px;
            background: rgba(255,255,255,.10);
            border: 1px solid rgba(255,255,255,.14);
        }

        .contact-step b {
            width: 36px;
            height: 36px;
            display: grid;
            place-items: center;
            border-radius: 13px;
            background: #fff;
            color: var(--primary);
        }

        .contact-step strong {
            display: block;
            color: #fff;
            line-height: 1.35;
        }

        .contact-step span {
            color: rgba(255,255,255,.66);
            font-size: .9rem;
        }

        .form-panel {
            padding: 28px;
        }

        .form-label {
            color: var(--ink);
            font-weight: 850;
            margin-bottom: 8px;
        }

        .form-control,
        .form-select {
            border-radius: 16px;
            border: 1px solid var(--line);
            background: #fbfdff;
            min-height: 50px;
            padding: 12px 14px;
            color: var(--text);
            transition: var(--ease);
        }

        textarea.form-control {
            min-height: 124px;
            resize: vertical;
        }

        .form-hint {
            color: var(--muted);
            font-size: .9rem;
            margin-top: 10px;
        }

        .site-footer {
            padding: 56px 0 28px;
            color: rgba(255,255,255,.76);
            background: #081225;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 30px;
            align-items: start;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: #fff;
            font-weight: 950;
            font-size: 1.22rem;
            margin-bottom: 14px;
        }

        .footer-brand .brand-mark {
            box-shadow: none;
        }

        .footer-text {
            max-width: 620px;
            margin: 0;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: flex-end;
        }

        .footer-links a {
            color: rgba(255,255,255,.72);
            padding: 9px 12px;
            border-radius: 999px;
            background: rgba(255,255,255,.06);
            border: 1px solid rgba(255,255,255,.08);
        }

        .footer-links a:hover {
            color: #fff;
            background: rgba(255,255,255,.12);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255,255,255,.10);
            margin-top: 34px;
            padding-top: 22px;
            font-size: .92rem;
            color: rgba(255,255,255,.58);
        }

        .floating-cta {
            position: fixed;
            left: 50%;
            bottom: 18px;
            transform: translateX(-50%);
            z-index: 999;
            width: min(100% - 28px, 760px);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 12px 14px 12px 18px;
            border-radius: 999px;
            background: rgba(255,255,255,.92);
            border: 1px solid rgba(219,229,245,.9);
            box-shadow: 0 18px 50px rgba(16,24,40,.16);
            backdrop-filter: blur(16px);
        }

        .floating-cta strong {
            color: var(--ink);
            display: block;
            line-height: 1.25;
        }

        .floating-cta span {
            color: var(--muted);
            font-size: .86rem;
        }

        @media (max-width: 1199px) {
            .series-strip {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

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

        @media (max-width: 991px) {
            .navbar-collapse {
                margin-top: 14px;
                padding: 14px;
                border-radius: 22px;
                background: #fff;
                border: 1px solid var(--line);
                box-shadow: var(--shadow-md);
            }

            .nav-actions {
                margin-left: 0;
                margin-top: 12px;
                align-items: stretch;
                flex-direction: column;
            }

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

            .hero-grid,
            .hot-layout,
            .news-layout,
            .member-grid,
            .material-grid,
            .faq-wrap,
            .form-shell,
            .footer-grid {
                grid-template-columns: 1fr;
            }

            .promo-stage {
                min-height: 400px;
            }

            .stage-main {
                right: 0;
                left: auto;
            }

            .stage-side {
                left: 0;
            }

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

            .compare-card.featured {
                transform: none;
            }

            .faq-aside {
                position: static;
            }

            .footer-links {
                justify-content: flex-start;
            }
        }

        @media (max-width: 767px) {
            :root {
                --nav-height: 70px;
            }

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

            .section {
                padding: 62px 0;
            }

            .hero {
                padding-top: 22px;
                padding-bottom: 48px;
            }

            .hero-promo {
                border-radius: 28px;
                min-height: auto;
                padding: 26px;
            }

            .hero h1 {
                letter-spacing: -.055em;
            }

            .hero-data-row,
            .hot-grid,
            .member-benefits {
                grid-template-columns: 1fr;
            }

            .promo-stage {
                min-height: auto;
                display: grid;
                gap: 14px;
                margin-top: 20px;
            }

            .stage-card {
                position: relative;
                width: 100%;
                inset: auto;
                transform: none;
            }

            .stage-side,
            .stage-mini,
            .stage-main {
                width: 100%;
            }

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

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

            .news-arrow {
                display: none;
            }

            .material-item {
                grid-template-columns: 46px minmax(0,1fr);
            }

            .material-item .btn-modern {
                grid-column: 1 / -1;
                width: 100%;
            }

            .floating-cta {
                border-radius: 24px;
                align-items: stretch;
                flex-direction: column;
                text-align: center;
            }

            .floating-cta .btn-modern {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1.05rem;
            }

            .brand-mark {
                width: 38px;
                height: 38px;
                border-radius: 13px;
            }

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

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

            .promo-ribbon {
                align-items: flex-start;
                flex-direction: column;
            }

            .section-title {
                font-size: 2rem;
            }

            .hot-feature {
                min-height: 360px;
            }

            .hot-feature .sticker {
                width: 78px;
                height: 78px;
                border-radius: 22px;
                font-size: .88rem;
            }

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

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}