/* roulang page: index */
:root {
        --primary: #5b2de1;
        --primary-dark: #351786;
        --accent: #ff3f6e;
        --accent-soft: #ffeaf0;
        --bg-deep: #0c0f1f;
        --bg-body: #f6f7fb;
        --surface: #ffffff;
        --text-main: #172033;
        --text-soft: #5b6677;
        --border: #e7e9f2;
        --radius-xl: 24px;
        --radius-lg: 18px;
        --radius-md: 14px;
        --shadow-sm: 0 6px 18px rgba(20, 20, 43, .05);
        --shadow-md: 0 12px 36px rgba(20, 20, 43, .08);
        --shadow-brand: 0 14px 36px rgba(91, 45, 225, .25);
        --space: clamp(3.5rem, 6vw, 5.5rem);
    }
    * {
        box-sizing: border-box;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        background: var(--bg-body);
        color: var(--text-main);
        line-height: 1.75;
        overflow-x: hidden;
    }
    img {
        max-width: 100%;
        display: block;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: color .2s ease;
    }
    button,
    input {
        font-family: inherit;
    }
    .section {
        padding: var(--space) 0;
        position: relative;
    }
    .section-head {
        max-width: 820px;
        margin-bottom: 2.8rem;
    }
    .section-head .kicker {
        display: inline-flex;
        align-items: center;
        gap: .4rem;
        background: rgba(91, 45, 225, .08);
        color: var(--primary);
        font-weight: 700;
        letter-spacing: .06em;
        padding: .34rem 1rem .34rem .55rem;
        border-radius: 100px;
        font-size: .875rem;
        margin-bottom: .9rem;
    }
    .section-head h2 {
        font-size: clamp(1.65rem, 2.6vw, 2.5rem);
        font-weight: 800;
        line-height: 1.25;
        letter-spacing: -.02em;
        color: var(--text-main);
        margin-bottom: .85rem;
    }
    .section-head p {
        font-size: 1.05rem;
        color: var(--text-soft);
        margin-bottom: 0;
    }
    .btn-brand,
    .btn-outline-light,
    .btn-soft {
        border-radius: 100px;
        padding: .7rem 1.55rem;
        font-weight: 700;
        font-size: .95rem;
        border: 0;
        transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .btn-brand {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 10px 26px rgba(91, 45, 225, .24);
    }
    .btn-brand:hover,
    .btn-brand:focus {
        background: var(--primary-dark);
        color: #fff;
        transform: translateY(-3px);
        box-shadow: var(--shadow-brand);
    }
    .btn-brand-sm {
        padding: .45rem 1.2rem;
        font-size: .9rem;
    }
    .btn-soft {
        background: rgba(255, 63, 110, .1);
        color: #d6163f;
    }
    .btn-soft:hover {
        background: var(--accent);
        color: #fff;
        transform: translateY(-2px);
    }
    .btn-outline-light {
        border: 1.8px solid rgba(255, 255, 255, .7);
        color: #fff;
        background: transparent;
    }
    .btn-outline-light:hover {
        background: rgba(255, 255, 255, .14);
        color: #fff;
        transform: translateY(-3px);
    }
    /* Header */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1080;
        background: rgba(255, 255, 255, .93);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        padding-top: .7rem;
        padding-bottom: .7rem;
        flex-wrap: wrap;
    }
    .brand {
        display: inline-flex;
        align-items: center;
        gap: .6rem;
        font-size: 1.45rem;
        font-weight: 900;
        letter-spacing: -.03em;
        color: var(--text-main);
    }
    .brand .brand-mark {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        font-size: 1.1rem;
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: .4rem;
        flex-wrap: wrap;
    }
    .main-nav a {
        display: inline-block;
        padding: .55rem 1.1rem;
        border-radius: 100px;
        color: var(--text-soft);
        font-weight: 700;
        font-size: .95rem;
        transition: background .2s ease, color .2s ease;
    }
    .main-nav a:hover {
        background: #f0f0f8;
        color: var(--primary);
    }
    .main-nav a.active {
        background: var(--primary);
        color: #fff;
    }
    .header-cta a {
        white-space: nowrap;
    }
    /* Hero */
    .hero {
        position: relative;
        padding: clamp(3.5rem, 7vw, 6rem) 0;
        background: var(--bg-deep) center center/cover no-repeat;
        color: #fff;
    }
    .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(100deg, rgba(8, 10, 25, .97) 5%, rgba(17, 11, 48, .88) 48%, rgba(58, 13, 55, .72) 100%);
    }
    .hero .container {
        position: relative;
        z-index: 2;
    }
    .hero-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: .45rem;
        border: 1px solid rgba(255, 255, 255, .18);
        background: rgba(255, 255, 255, .08);
        padding: .4rem 1.1rem;
        border-radius: 100px;
        font-size: .85rem;
        font-weight: 600;
        color: rgba(255, 255, 255, .9);
        margin-bottom: 1.25rem;
        backdrop-filter: blur(6px);
    }
    .hero h1 {
        font-size: clamp(1.95rem, 4.5vw, 3.4rem);
        font-weight: 900;
        line-height: 1.2;
        letter-spacing: -.035em;
        max-width: 760px;
        margin-bottom: 1.1rem;
    }
    .hero h1 span {
        background: linear-gradient(120deg, #ffd166, var(--accent));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    .hero-lead {
        font-size: 1.12rem;
        color: rgba(255, 255, 255, .78);
        max-width: 620px;
        margin-bottom: 2rem;
    }
    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: .9rem;
        margin-bottom: 2.2rem;
    }
    .hero-stats {
        display: flex;
        flex-wrap: wrap;
        gap: 2rem;
        padding-top: 1.6rem;
        border-top: 1px solid rgba(255, 255, 255, .16);
    }
    .hero-stats strong {
        display: block;
        font-size: 1.7rem;
        font-weight: 900;
        line-height: 1.2;
    }
    .hero-stats span {
        color: rgba(255, 255, 255, .62);
        font-size: .88rem;
    }
    .rank-panel {
        background: rgba(255, 255, 255, .07);
        border: 1px solid rgba(255, 255, 255, .14);
        border-radius: var(--radius-xl);
        backdrop-filter: blur(12px);
        padding: 1.4rem 1.25rem;
        color: #fff;
    }
    .rank-panel .rank-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-bottom: 1rem;
        margin-bottom: .4rem;
        border-bottom: 1px solid rgba(255, 255, 255, .12);
    }
    .rank-panel .rank-head h3 {
        font-size: 1.15rem;
        font-weight: 800;
        display: flex;
        align-items: center;
        gap: .4rem;
        margin: 0;
    }
    .rank-panel .rank-head a {
        font-size: .85rem;
        color: rgba(255, 255, 255, .65);
    }
    .rank-item {
        display: flex;
        align-items: center;
        gap: .75rem;
        padding: .72rem .3rem;
        border-radius: 12px;
        transition: background .2s ease, transform .2s ease;
    }
    .rank-item:hover {
        background: rgba(255, 255, 255, .08);
        transform: translateX(4px);
    }
    .rank-index {
        width: 28px;
        height: 28px;
        flex: 0 0 28px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 9px;
        background: rgba(255, 255, 255, .1);
        font-weight: 800;
        font-size: .85rem;
    }
    .rank-index.top {
        background: var(--accent);
        color: #fff;
    }
    .rank-name {
        flex: 1;
        font-weight: 600;
        font-size: .95rem;
    }
    .rank-trend {
        color: #ffd166;
        font-size: .85rem;
        font-weight: 700;
    }
    /* metrics strip */
    .metrics-strip {
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        padding: 2.2rem 0;
    }
    .metric-item {
        display: flex;
        align-items: center;
        gap: 1rem;
    }
    .metric-icon {
        width: 52px;
        height: 52px;
        flex: 0 0 52px;
        border-radius: 16px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
        background: rgba(91, 45, 225, .08);
        color: var(--primary);
    }
    .metric-item strong {
        display: block;
        font-size: 1.45rem;
        font-weight: 900;
        line-height: 1.2;
    }
    .metric-item span {
        color: var(--text-soft);
        font-size: .88rem;
    }
    /* reward / invite */
    .reward-section {
        background: linear-gradient(180deg, #fff 0%, #f6f3ff 100%);
    }
    .reward-panel {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-xl);
        box-shadow: var(--shadow-sm);
        padding: 1.9rem;
        height: 100%;
    }
    .reward-panel .panel-title {
        font-size: 1.2rem;
        font-weight: 800;
        margin-bottom: 1.2rem;
        display: flex;
        align-items: center;
        gap: .5rem;
    }
    .reward-steps {
        list-style: none;
        margin: 0 0 1.4rem 0;
        padding: 0;
    }
    .reward-steps li {
        display: flex;
        gap: 1rem;
        padding: .7rem 0;
        border-bottom: 1px dashed #e4e6f2;
    }
    .reward-steps li:last-child {
        border-bottom: 0;
    }
    .step-num {
        width: 34px;
        height: 34px;
        flex: 0 0 34px;
        border-radius: 12px;
        background: rgba(91, 45, 225, .1);
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-weight: 900;
        font-size: .9rem;
    }
    .reward-steps strong {
        font-weight: 800;
        color: var(--text-main);
        display: block;
        line-height: 1.3;
    }
    .reward-steps p {
        margin: .2rem 0 0;
        color: var(--text-soft);
        font-size: .92rem;
        line-height: 1.6;
    }
    .progress-custom {
        background: rgba(91, 45, 225, .1);
        border-radius: 100px;
        height: 10px;
        overflow: hidden;
        margin-bottom: .5rem;
    }
    .progress-custom .progress-bar {
        height: 100%;
        border-radius: 100px;
        background: linear-gradient(90deg, var(--primary), var(--accent));
    }
    .progress-meta {
        font-size: .9rem;
        color: var(--text-soft);
        margin-bottom: 1.2rem;
    }
    .leader-panel {
        background: linear-gradient(135deg, #141a31 0%, #1d1536 100%);
        color: #fff;
        border-radius: var(--radius-xl);
        padding: 1.8rem;
        margin-bottom: 1.4rem;
        position: relative;
        overflow: hidden;
    }
    .leader-panel::after {
        content: "\f521";
        font-family: "Font Awesome 6 Free";
        font-weight: 900;
        position: absolute;
        right: -1rem;
        bottom: -1.2rem;
        font-size: 6rem;
        opacity: .08;
        color: #fff;
        transform: rotate(-12deg);
    }
    .leader-panel h4 {
        font-size: 1.15rem;
        font-weight: 800;
        margin-bottom: .2rem;
    }
    .leader-panel p {
        color: rgba(255, 255, 255, .7);
        font-size: .9rem;
        margin-bottom: 1.3rem;
    }
    .leader-row {
        position: relative;
        z-index: 1;
        display: flex;
        align-items: center;
        gap: .75rem;
        background: rgba(255, 255, 255, .06);
        border-radius: 16px;
        padding: .7rem .9rem;
        margin-bottom: .7rem;
        border: 1px solid rgba(255, 255, 255, .08);
    }
    .leader-rank {
        font-weight: 900;
        color: #ffd166;
        width: 42px;
        flex: 0 0 42px;
        text-align: center;
    }
    .leader-name {
        flex: 1;
        font-weight: 600;
        font-size: .95rem;
    }
    .leader-count {
        background: rgba(255, 255, 255, .14);
        border-radius: 100px;
        padding: .18rem .75rem;
        font-size: .8rem;
        color: #ffd166;
        font-weight: 700;
    }
    .share-guide {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-xl);
        padding: 1.5rem 1.7rem;
        box-shadow: var(--shadow-sm);
        display: flex;
        gap: 1rem;
        align-items: flex-start;
    }
    .share-guide i {
        color: var(--accent);
        font-size: 1.7rem;
    }
    .share-guide strong {
        display: block;
        font-weight: 800;
    }
    .share-guide p {
        margin-bottom: .8rem;
        color: var(--text-soft);
        font-size: .92rem;
    }
    .share-guide .btn {
        padding: .4rem 1.1rem;
        font-size: .88rem;
    }
    /* Materials / service matrix */
    .material-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-xl);
        height: 100%;
        overflow: hidden;
        transition: transform .25s ease, box-shadow .25s ease;
        box-shadow: var(--shadow-sm);
    }
    .material-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-md);
    }
    .material-thumb {
        height: 180px;
        overflow: hidden;
        position: relative;
        background: #eceef7;
    }
    .material-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s ease;
    }
    .material-card:hover .material-thumb img {
        transform: scale(1.04);
    }
    .material-thumb .mat-icon {
        position: absolute;
        left: 1rem;
        top: 1rem;
        width: 38px;
        height: 38px;
        background: rgba(255, 255, 255, .9);
        backdrop-filter: blur(6px);
        color: var(--primary);
        border-radius: 12px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
    }
    .material-body {
        padding: 1.5rem 1.4rem 1.7rem;
    }
    .material-body h3 {
        font-size: 1.12rem;
        font-weight: 800;
        margin-bottom: .45rem;
    }
    .material-body p {
        color: var(--text-soft);
        font-size: .92rem;
        margin-bottom: .8rem;
    }
    .mat-link {
        color: var(--primary);
        font-weight: 700;
        font-size: .9rem;
    }
    .mat-link i {
        margin-left: .25rem;
        font-size: .8rem;
        transition: margin .2s ease;
    }
    .mat-link:hover i {
        margin-left: .5rem;
    }
    /* news */
    .news-form {
        padding-top: clamp(2rem, 4vw, 3.5rem);
    }
    .news-list .news-item {
        display: block;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 1.4rem 1.5rem;
        margin-bottom: .9rem;
        box-shadow: 0 2px 8px rgba(20, 20, 43, .02);
        transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    .news-item:hover {
        transform: translateY(-2px);
        border-color: rgba(91, 45, 225, .2);
        box-shadow: var(--shadow-sm);
    }
    .news-meta {
        display: flex;
        align-items: center;
        gap: .6rem;
        flex-wrap: wrap;
        margin-bottom: .5rem;
    }
    .news-tag {
        background: rgba(91, 45, 225, .08);
        color: var(--primary);
        border-radius: 6px;
        font-weight: 700;
        font-size: .78rem;
        padding: .14rem .62rem;
        letter-spacing: .03em;
    }
    .news-date {
        font-size: .8rem;
        color: var(--text-soft);
    }
    .news-item h3 {
        font-size: 1.12rem;
        font-weight: 800;
        line-height: 1.45;
        color: var(--text-main);
        margin-bottom: .3rem;
        transition: color .2s ease;
    }
    .news-item:hover h3 {
        color: var(--primary);
    }
    .news-item p {
        color: var(--text-soft);
        font-size: .93rem;
        margin: 0;
    }
    .side-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 1.5rem;
        margin-bottom: 1.2rem;
        box-shadow: var(--shadow-sm);
    }
    .side-card h3 {
        font-size: 1.15rem;
        font-weight: 800;
        margin-bottom: 1rem;
    }
    .hot-tags {
        display: flex;
        flex-wrap: wrap;
        gap: .5rem;
    }
    .hot-tags a {
        display: inline-block;
        background: #f4f5fa;
        border-radius: 100px;
        padding: .28rem .95rem;
        font-size: .88rem;
        color: var(--text-soft);
        font-weight: 600;
        transition: all .2s ease;
    }
    .hot-tags a:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-1px);
    }
    .mini-card {
        background: linear-gradient(145deg, #fbf7ff, #fff);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: .9rem;
        display: flex;
        gap: .8rem;
        align-items: center;
        margin-top: .8rem;
    }
    .mini-card img {
        width: 58px;
        height: 58px;
        border-radius: 14px;
        object-fit: cover;
    }
    .mini-card strong {
        display: block;
        font-size: .95rem;
        line-height: 1.3;
    }
    .mini-card span {
        color: var(--primary);
        font-size: .78rem;
        font-weight: 700;
    }
    /* join / cta */
    .cta-join {
        position: relative;
        padding: var(--space) 0;
        background: var(--bg-deep) center center/cover no-repeat;
        color: #fff;
    }
    .cta-join::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(9, 8, 24, .95), rgba(29, 15, 60, .85));
    }
    .cta-join .container {
        position: relative;
        z-index: 2;
    }
    .cta-join h2 {
        font-size: clamp(1.7rem, 3.6vw, 2.8rem);
        font-weight: 900;
        max-width: 720px;
        line-height: 1.25;
        letter-spacing: -.02em;
        margin-bottom: 1rem;
    }
    .cta-join .cta-desc {
        max-width: 620px;
        color: rgba(255, 255, 255, .76);
        font-size: 1.05rem;
        margin-bottom: 1.8rem;
    }
    .cta-join .btn-brand {
        background: #fff;
        color: var(--primary);
    }
    .cta-join .btn-brand:hover {
        background: #ffeaf0;
        box-shadow: 0 12px 30px rgba(255, 255, 255, .1);
    }
    .subscribe-wrap {
        background: rgba(255, 255, 255, .1);
        border: 1px solid rgba(255, 255, 255, .18);
        border-radius: 100px;
        max-width: 560px;
        padding: .35rem .35rem .35rem 1.3rem;
        display: flex;
        align-items: center;
        backdrop-filter: blur(8px);
    }
    .subscribe-wrap input {
        flex: 1;
        min-width: 0;
        background: transparent;
        border: 0;
        outline: none;
        color: #fff;
        padding: .45rem 0;
        font-size: .96rem;
    }
    .subscribe-wrap input::placeholder {
        color: rgba(255, 255, 255, .55);
    }
    .subscribe-wrap .btn {
        border-radius: 100px;
        white-space: nowrap;
        padding: .7rem 1.4rem;
        font-weight: 700;
        background: var(--accent);
        color: #fff;
    }
    .subscribe-wrap .btn:hover {
        background: #e02655;
    }
    /* faq */
    .faq-section .section-head {
        max-width: 600px;
    }
    .faq-item {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 1.2rem 1.4rem;
        margin-bottom: .75rem;
        box-shadow: 0 2px 10px rgba(20, 20, 43, .04);
        transition: border-color .2s ease, box-shadow .2s ease;
    }
    .faq-item:hover {
        border-color: rgba(91, 45, 225, .22);
        box-shadow: var(--shadow-sm);
    }
    .faq-item h3 {
        font-size: 1.04rem;
        font-weight: 800;
        color: var(--text-main);
        display: flex;
        align-items: center;
        gap: .55rem;
        margin-bottom: .35rem;
    }
    .faq-item h3 i {
        color: var(--accent);
        font-size: .9rem;
    }
    .faq-item p {
        color: var(--text-soft);
        font-size: .95rem;
        margin: 0;
        padding-left: 1.5rem;
    }
    /* footer */
    .site-footer {
        background: #0a0d1c;
        color: #9aa1b5;
        padding-top: 3rem;
        padding-bottom: 1.8rem;
    }
    .footer-head {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 2rem;
        padding-bottom: 1.8rem;
        border-bottom: 1px solid rgba(255, 255, 255, .1);
        flex-wrap: wrap;
    }
    .footer-brand {
        font-size: 1.3rem;
        font-weight: 900;
        color: #fff;
        display: flex;
        align-items: center;
        gap: .5rem;
    }
    .footer-brand .brand-mark {
        background: linear-gradient(135deg, var(--primary), var(--accent));
        width: 34px;
        height: 34px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        font-size: .95rem;
    }
    .footer-desc {
        font-size: .93rem;
        max-width: 420px;
        margin-top: .4rem;
        color: #8990a5;
    }
    .footer-nav {
        display: flex;
        gap: 1.2rem;
        flex-wrap: wrap;
    }
    .footer-nav a {
        color: #b8bfd1;
        font-weight: 600;
        font-size: .92rem;
    }
    .footer-nav a:hover {
        color: #fff;
    }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: .8rem;
        flex-wrap: wrap;
        padding-top: 1.3rem;
        font-size: .85rem;
        color: #788096;
    }
    @media (max-width: 1024px) {
        .hero h1 {
            font-size: 2.5rem;
        }
        .metrics-strip .metric-item {
            padding: .6rem 0;
        }
    }
    @media (max-width: 768px) {
        .header-inner {
            flex-direction: column;
            align-items: center;
        }
        .main-nav {
            justify-content: center;
        }
        .hero {
            text-align: center;
        }
        .hero-actions {
            justify-content: center;
        }
        .hero-stats {
            justify-content: center;
        }
        .hero h1,
        .hero-lead {
            margin-left: auto;
            margin-right: auto;
        }
        .section-head {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }
        .section-head .kicker {
            margin-bottom: .9rem;
        }
        .metric-item {
            justify-content: center;
            text-align: center;
            flex-direction: column;
            gap: .3rem;
            padding: .5rem 0;
        }
        .metric-icon {
            width: 44px;
            height: 44px;
            flex-basis: 44px;
        }
        .cta-join h2 {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .cta-join .cta-desc {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .cta-join .section-actions {
            justify-content: center;
        }
        .subscribe-wrap {
            margin: 0 auto;
            max-width: 100%;
        }
        .footer-head {
            flex-direction: column;
            text-align: center;
            align-items: center;
        }
        .footer-descn {
            font-size: .9rem;
        }
        .footer-bottom {
            justify-content: center;
            text-align: center;
        }
    }
    @media (max-width: 520px) {
        .main-nav a {
            padding: .45rem .8rem;
            font-size: .88rem;
        }
        .brand {
            font-size: 1.25rem;
        }
        .hero-actions {
            flex-direction: column;
            align-items: stretch;
        }
        .hero-actions .btn {
            margin-bottom: .2rem;
        }
        .hero-stats {
            gap: 1.2rem;
            flex-direction: column;
        }
        .rank-panel {
            padding: 1.1rem 1rem;
        }
        .share-guide {
            flex-direction: column;
        }
        .material-thumb {
            height: 170px;
        }
        .subscribe-wrap {
            flex-direction: column;
            gap: .5rem;
            border-radius: var(--radius-lg);
            background: transparent;
            border-color: transparent;
        }
        .subscribe-wrap input,
        .subscribe-wrap .btn {
            width: 100%;
            border-radius: 100px;
            padding: .7rem 1.2rem;
        }
        .subscribe-wrap input {
            background: rgba(255, 255, 255, .12);
            padding-left: 1.2rem;
        }
    }

/* roulang page: category1 */
:root {
  --primary: #5b2de1;
  --primary-dark: #351786;
  --accent: #ff3f6e;
  --accent-soft: #ffeaf0;
  --bg-deep: #0c0f1f;
  --bg-body: #f6f7fb;
  --surface: #ffffff;
  --text-main: #172033;
  --text-soft: #5b6677;
  --border: #e7e9f2;
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --shadow-sm: 0 6px 18px rgba(20, 20, 43, .05);
  --shadow-md: 0 12px 36px rgba(20, 20, 43, .08);
  --shadow-brand: 0 14px 36px rgba(91, 45, 225, .25);
  --space: clamp(3.5rem, 6vw, 5.5rem);
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.75;
  overflow-x: hidden;
  margin: 0;
}
* {
  box-sizing: border-box;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color .2s ease;
}
button,
input,
select,
textarea {
  font-family: inherit;
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
.container {
  max-width: 1200px;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}
.section {
  padding: var(--space) 0;
  position: relative;
}
.section-head {
  max-width: 820px;
  margin-bottom: 2.8rem;
}
.section-head .kicker {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: rgba(91, 45, 225, .08);
  color: var(--primary);
  font-weight: 700;
  letter-spacing: .06em;
  padding: .34rem 1rem .34rem .55rem;
  border-radius: 100px;
  font-size: .875rem;
  margin-bottom: .9rem;
}
.section-head .kicker i {
  color: var(--accent);
  font-size: .85rem;
}
.section-head h2 {
  font-size: clamp(1.65rem, 2.6vw, 2.5rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--text-main);
  margin-bottom: .85rem;
}
.section-head p {
  font-size: 1.05rem;
  color: var(--text-soft);
  margin-bottom: 0;
}
.btn-brand,
.btn-outline-light,
.btn-soft {
  border-radius: 100px;
  padding: .7rem 1.55rem;
  font-weight: 700;
  font-size: .95rem;
  border: 0;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
}
.btn-brand {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 26px rgba(91, 45, 225, .24);
}
.btn-brand:hover,
.btn-brand:focus {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-brand);
}
.btn-brand-sm {
  padding: .45rem 1.2rem;
  font-size: .9rem;
}
.btn-soft {
  background: rgba(255, 63, 110, .1);
  color: #d6163f;
}
.btn-soft:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}
.btn-outline-light {
  border: 1.8px solid rgba(255, 255, 255, .7);
  color: #fff;
  background: transparent;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, .14);
  color: #fff;
  transform: translateY(-3px);
}

/* 站点 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1080;
  background: rgba(255, 255, 255, .93);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: .7rem;
  padding-bottom: .7rem;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: -.03em;
  color: var(--text-main);
}
.brand .brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 1.1rem;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: .4rem;
  flex-wrap: wrap;
}
.main-nav a {
  display: inline-block;
  padding: .55rem 1.1rem;
  border-radius: 100px;
  color: var(--text-soft);
  font-weight: 700;
  font-size: .95rem;
  transition: background .2s ease, color .2s ease;
}
.main-nav a:hover {
  background: #f0f0f8;
  color: var(--primary);
}
.main-nav a.active {
  background: var(--primary);
  color: #fff;
}
.header-cta a {
  white-space: nowrap;
}

/* 内页 Hero */
.page-hero {
  position: relative;
  padding: clamp(3.6rem, 7vw, 6rem) 0;
  background: var(--bg-deep) center center/cover no-repeat;
  color: #fff;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(8, 10, 25, .97) 5%, rgba(17, 11, 48, .88) 48%, rgba(58, 13, 55, .72) 100%);
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  border: 1px solid rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .08);
  padding: .4rem 1.1rem;
  border-radius: 100px;
  font-size: .85rem;
  font-weight: 600;
  color: rgba(255, 255, 255, .92);
  margin-bottom: 1.25rem;
  backdrop-filter: blur(6px);
}
.hero-eyebrow i {
  color: #ffd166;
}
.page-hero h1 {
  font-size: clamp(1.95rem, 4.2vw, 3.2rem);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -.035em;
  max-width: 700px;
  margin-bottom: 1.1rem;
  color: #fff;
}
.page-hero h1 span {
  background: linear-gradient(120deg, #ffd166, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-lead {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, .78);
  max-width: 620px;
  margin-bottom: 2rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-bottom: 2.2rem;
}
.hero-kpis {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.2rem, 3vw, 2.6rem);
  border-top: 1px solid rgba(255, 255, 255, .18);
  padding-top: 1.8rem;
}
.hero-kpi b {
  display: block;
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1.2;
  color: #ffd166;
}
.hero-kpi span {
  display: block;
  font-size: .9rem;
  color: rgba(255, 255, 255, .66);
  font-weight: 600;
  letter-spacing: .04em;
}
.hero-media {
  position: relative;
  max-width: 600px;
  margin-left: auto;
  padding: 1.2rem 1rem 1rem 0;
}
.hero-media::before {
  content: "";
  position: absolute;
  top: 0;
  right: 6%;
  width: 46%;
  height: 70%;
  background: linear-gradient(135deg, rgba(255, 209, 102, .6), rgba(255, 63, 110, .6));
  border-radius: 42px 18px 60px 18px;
  transform: rotate(-7deg);
  z-index: 0;
}
.hero-photo {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 32px 80px rgba(0, 0, 0, .38);
  transform: rotate(1.4deg);
  max-width: 520px;
  margin-left: auto;
}
.hero-photo img {
  width: 100%;
  aspect-ratio: 5 / 7;
  object-fit: cover;
}
.hero-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(12, 15, 31, .18));
  pointer-events: none;
}

/* 数据看板 */
.metrics-section {
  background: var(--bg-body);
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}
.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.7rem;
  box-shadow: var(--shadow-sm);
  height: 100%;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.metric-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(91, 45, 225, .22);
}
.metric-card i {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: rgba(91, 45, 225, .08);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}
.metric-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: .45rem;
}
.metric-card p {
  color: var(--text-soft);
  font-size: .95rem;
  margin: 0;
}
.metric-note {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin-top: 1.2rem;
  background: #f0f0f8;
  color: var(--text-soft);
  font-size: .85rem;
  font-weight: 700;
  border-radius: 100px;
  padding: .35rem 1rem;
}

/* 榜单服务矩阵 */
.matrix-section {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.head-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.2rem;
}
.head-row .section-head {
  margin-bottom: 2rem;
}
.ranking-card {
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  height: 100%;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
  position: relative;
}
.ranking-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  background: #fff;
}
.ranking-card .card-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), #8f46f5);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  box-shadow: 0 10px 24px rgba(91, 45, 225, .2);
}
.rank-tag {
  display: inline-block;
  background: var(--accent-soft);
  color: #d6163f;
  font-size: .8rem;
  font-weight: 700;
  padding: .15rem .75rem;
  border-radius: 100px;
  margin-bottom: .8rem;
  letter-spacing: .03em;
}
.ranking-card h3 {
  font-size: 1.22rem;
  font-weight: 800;
  margin-bottom: .55rem;
}
.ranking-card p {
  color: var(--text-soft);
  font-size: .95rem;
  margin-bottom: 0;
}

/* 结果对比 */
.compare-section {
  background: var(--bg-deep);
  color: #fff;
}
.compare-section .section-head h2 {
  color: #fff;
}
.compare-section .section-head p {
  color: rgba(255, 255, 255, .7);
}
.compare-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 1.2rem;
  align-items: stretch;
}
.compare-card {
  border-radius: var(--radius-xl);
  padding: 2rem;
  height: 100%;
}
.compare-card.before-card {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .14);
  color: rgba(255, 255, 255, .86);
}
.compare-card.after-card {
  background: linear-gradient(135deg, var(--primary), #8f46f5);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.compare-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 1.1rem;
}
.compare-card p {
  font-size: .96rem;
  color: inherit;
  opacity: .85;
}
.compare-list li {
  padding-left: 1.9rem;
  position: relative;
  margin-bottom: .8rem;
  font-size: .96rem;
}
.compare-list li::before {
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 0;
  font-size: 1rem;
}
.before-card .compare-list li::before {
  content: "\f00d";
  color: #ff7b9c;
}
.after-card .compare-list li::before {
  content: "\f00c";
  color: #ffd166;
}
.vs-badge {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1rem;
  box-shadow: 0 12px 28px rgba(255, 63, 110, .32);
  align-self: center;
}
.scenario-row {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-top: 3rem;
}
.scenario-item {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  color: rgba(255, 255, 255, .92);
  border-radius: 100px;
  padding: .5rem 1.2rem;
  font-weight: 600;
  font-size: .92rem;
  backdrop-filter: blur(6px);
  transition: background .2s ease, transform .2s ease;
}
.scenario-item:hover {
  background: rgba(255, 255, 255, .15);
  transform: translateY(-2px);
}
.scenario-item i {
  color: #ffd166;
  font-size: .95rem;
}

/* 参与流程 */
.steps-section {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
}
.step-box {
  position: relative;
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.8rem 1.5rem 1.6rem;
  height: 100%;
  transition: transform .25s ease, box-shadow .25s ease;
}
.step-box:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}
.step-index {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  font-size: 1.2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  box-shadow: 0 8px 22px rgba(91, 45, 225, .22);
}
.step-box h3 {
  font-size: 1.12rem;
  font-weight: 800;
  margin-bottom: .5rem;
}
.step-box p {
  color: var(--text-soft);
  font-size: .94rem;
  margin: 0;
}

/* FAQ */
.faq-section {
  background: var(--bg-body);
}
.faq-accordion .accordion-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}
.faq-accordion .accordion-button {
  background: #fff;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.03rem;
  padding: 1.2rem 1.5rem;
  box-shadow: none;
  border: none;
}
.faq-accordion .accordion-button:not(.collapsed) {
  background: var(--primary);
  color: #fff;
}
.faq-accordion .accordion-button::after {
  filter: opacity(.55);
}
.faq-accordion .accordion-button:not(.collapsed)::after {
  filter: brightness(0) invert(1);
}
.faq-accordion .accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(91, 45, 225, .14);
}
.faq-accordion .accordion-body {
  padding: .2rem 1.5rem 1.3rem;
  color: var(--text-soft);
  line-height: 1.8;
}

/* CTA / 转化表单 */
.cta-section {
  background: var(--bg-body);
}
.cta-panel {
  position: relative;
  background: linear-gradient(115deg, #160e38 0%, #351786 52%, #5b2de1 100%);
  color: #fff;
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 5vw, 3.8rem);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(23, 9, 71, .25);
}
.cta-panel::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -90px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255, 63, 110, .18);
  filter: blur(14px);
}
.cta-panel .container-fluid {
  position: relative;
  z-index: 1;
}
.cta-kicker {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: rgba(255, 255, 255, .12);
  color: #ffd166;
  font-size: .85rem;
  font-weight: 800;
  border-radius: 100px;
  padding: .35rem 1rem;
  margin-bottom: 1rem;
}
.cta-panel h2 {
  color: #fff;
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.28;
  margin-bottom: 1rem;
}
.cta-panel .cta-copy {
  color: rgba(255, 255, 255, .82);
  font-size: 1.02rem;
  margin-bottom: 1.4rem;
}
.cta-points li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: .8rem;
  color: rgba(255, 255, 255, .9);
  font-weight: 600;
}
.cta-points li i {
  position: absolute;
  left: 0;
  top: .3rem;
  color: #ffd166;
}
.share-form-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 1.8rem 1.6rem 1.6rem;
  box-shadow: var(--shadow-brand);
  color: var(--text-main);
}
.share-form-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: .35rem;
}
.share-form-card .form-hint {
  color: var(--text-soft);
  font-size: .9rem;
  margin-bottom: 1.2rem;
}
.form-label {
  font-weight: 700;
  color: var(--text-main);
  font-size: .92rem;
}
.form-control {
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: #f7f8fd;
  color: var(--text-main);
  padding: .7rem 1rem;
  box-shadow: none;
  font-size: .96rem;
}
.form-control:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 .25rem rgba(91, 45, 225, .1);
}
textarea.form-control {
  min-height: 100px;
  resize: vertical;
}
.share-note {
  display: none;
  margin-top: 1rem;
  border-radius: 12px;
  background: #edf7ed;
  color: #1d7a3b;
  font-weight: 700;
  font-size: .92rem;
  padding: .75rem 1rem;
}
.share-note.show {
  display: block;
}

/* Footer */
.site-footer {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, .72);
  padding: 3.8rem 0 1.5rem;
}
.footer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  padding-bottom: 2.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  margin-bottom: 1.5rem;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: 1.4rem;
  font-weight: 900;
  color: #fff;
}
.footer-brand .brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
}
.footer-desc {
  max-width: 430px;
  color: rgba(255, 255, 255, .65);
  font-size: .95rem;
  margin: 1rem 0 0;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-nav a {
  display: inline-block;
  padding: .5rem 1.2rem;
  border-radius: 100px;
  color: rgba(255, 255, 255, .74);
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, .14);
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.footer-nav a:hover {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .3);
  color: #fff;
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem 2rem;
  justify-content: space-between;
  align-items: center;
  color: rgba(255, 255, 255, .42);
  font-size: .88rem;
}
.footer-bottom a {
  color: rgba(255, 255, 255, .6);
}
.footer-bottom a:hover {
  color: #fff;
}

/* 响应式 */
@media (max-width: 991.98px) {
  .hero-media {
    max-width: 460px;
    margin: 3rem auto 0;
  }
  .hero-media::before {
    right: 10%;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .compare-layout {
    grid-template-columns: 1fr;
  }
  .vs-badge {
    margin: 0 auto;
    transform: rotate(90deg);
  }
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 767.98px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .footer-head {
    flex-direction: column;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-header .header-inner {
    flex-direction: column;
    align-items: center;
    padding-top: 1rem;
  }
  .brand,
  .main-nav,
  .header-cta {
    justify-content: center;
  }
  .header-cta {
    display: none;
  }
  .section-head p {
    font-size: 1rem;
  }
  .hero-kpis {
    gap: 1.2rem;
  }
  .hero-kpi b {
    font-size: 1.5rem;
  }
  .scenario-row {
    gap: .6rem;
  }
  .scenario-item {
    padding: .4rem .95rem;
    font-size: .88rem;
  }
  .page-hero h1 {
    font-size: 2rem;
  }
  .cta-panel {
    padding: 2rem 1.25rem;
  }
  .share-form-card {
    padding: 1.4rem 1.2rem;
  }
}
@media (max-width: 520px) {
  .main-nav a {
    padding: .45rem .85rem;
    font-size: .88rem;
  }
  .brand {
    font-size: 1.2rem;
  }
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .hero-actions .btn {
    padding: .65rem 1.3rem;
    font-size: .92rem;
  }
  .hero-media {
    padding-right: 0;
  }
}

/* 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}