/* roulang page: index */
:root {
      --bg-main: #0F1117;
      --bg-card: #181B26;
      --bg-card-sub: #222738;
      --primary: #7C3AED;
      --primary-hover: #6D28D9;
      --accent-cyan: #06B6D4;
      --accent-green: #10B981;
      --accent-orange: #F59E0B;
      --text-main: #F9FAFB;
      --text-muted: #9CA3AF;
      --text-sub: #6B7280;
      --border-color: #2E364F;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-pill: 9999px;
      --shadow-normal: 0 10px 25px -5px rgba(0, 0, 0, 0.45);
      --shadow-neon: 0 0 25px -4px rgba(124, 58, 237, 0.35);
      --container-max: 1240px;
      --trans-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: radial-gradient(circle at 50% 0%, #1e1738 0%, var(--bg-main) 65%);
      min-height: 100vh;
    }

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

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

    ul, ol {
      list-style: none;
    }

    button, input {
      font-family: inherit;
      outline: none;
      border: none;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(15, 17, 23, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-topbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-sub);
      border-bottom: 1px solid rgba(46, 54, 79, 0.4);
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent-green);
    }

    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-green);
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0% { opacity: 0.6; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.2); }
      100% { opacity: 0.6; transform: scale(0.9); }
    }

    .header-mainnav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px 0;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }

    .logo-emblem {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 900;
      color: #fff;
      box-shadow: var(--shadow-neon);
    }

    .nav-links {
      display: flex;
      gap: 24px;
      align-items: center;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--text-main);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .nav-actions {
      display: flex;
      gap: 12px;
      align-items: center;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      border-radius: var(--radius-pill);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--trans-smooth);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #9333EA);
      color: #FFF;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--primary));
      transform: translateY(-2px);
      box-shadow: var(--shadow-neon);
    }

    .btn-outline {
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      background: rgba(34, 39, 56, 0.4);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--text-main);
      background: rgba(124, 58, 237, 0.15);
      transform: translateY(-2px);
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent-cyan), #0284C7);
      color: #06111C;
      font-weight: 700;
    }

    .btn-accent:hover {
      filter: brightness(1.1);
      transform: translateY(-2px);
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: rgba(24, 27, 38, 0.45);
      border-top: 1px solid rgba(46, 54, 79, 0.4);
      border-bottom: 1px solid rgba(46, 54, 79, 0.4);
    }

    .section-head {
      margin-bottom: 48px;
    }

    .section-head.center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(124, 58, 237, 0.16);
      border: 1px solid rgba(124, 58, 237, 0.35);
      color: #C4B5FD;
      font-size: 13px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. 首屏轮播 & 直播预告结构 (版式蓝图硬性) */
    .hero-section {
      padding: 40px 0 80px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 36px;
      align-items: center;
    }

    .hero-h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
      background: linear-gradient(180deg, #FFFFFF 30%, #D1D5DB 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 32px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-stream-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-normal);
      position: relative;
    }

    .stream-preview-wrap {
      position: relative;
      width: 100%;
      height: 240px;
      overflow: hidden;
    }

    .stream-preview-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .hero-stream-card:hover .stream-preview-wrap img {
      transform: scale(1.04);
    }

    .stream-status-overlay {
      position: absolute;
      top: 14px;
      left: 14px;
      display: flex;
      gap: 8px;
    }

    .live-tag {
      background: #EF4444;
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      text-transform: uppercase;
      box-shadow: 0 2px 8px rgba(239, 68, 68, 0.5);
    }

    .stream-body {
      padding: 24px;
    }

    .countdown-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 8px;
      text-align: center;
      background: rgba(15, 17, 23, 0.7);
      padding: 12px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      margin: 16px 0;
    }

    .countdown-num {
      font-size: 20px;
      font-weight: 800;
      color: var(--accent-cyan);
    }

    .countdown-label {
      font-size: 11px;
      color: var(--text-sub);
    }

    /* 2. 品类入口 */
    .category-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .category-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--trans-smooth);
      position: relative;
    }

    .category-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-neon);
    }

    .cat-icon {
      font-size: 32px;
      margin-bottom: 16px;
      display: inline-block;
    }

    .cat-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .cat-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
    }

    .cat-meta {
      font-size: 12px;
      color: var(--accent-cyan);
      font-weight: 600;
    }

    /* 3. 附近推荐与同城声学雷达 */
    .radar-banner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      background: linear-gradient(135deg, rgba(24, 27, 38, 0.9), rgba(34, 39, 56, 0.8));
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
    }

    .radar-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .radar-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      background: rgba(15, 17, 23, 0.6);
      border-radius: var(--radius-md);
      border: 1px solid rgba(46, 54, 79, 0.6);
    }

    .radar-user-info {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .radar-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #2E364F;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--accent-cyan);
      border: 2px solid var(--primary);
    }

    /* 4. 口碑榜 (战绩与俱乐部积分排行榜) */
    .leaderboard-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .rank-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
    }

    .rank-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 12px;
      border-bottom: 1px solid rgba(46, 54, 79, 0.6);
    }

    .rank-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
    }

    .rank-badge {
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 4px;
      background: rgba(245, 158, 11, 0.15);
      color: var(--accent-orange);
    }

    .rank-rows {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .rank-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 14px;
    }

    .rank-num {
      width: 22px;
      font-weight: 800;
      color: var(--text-sub);
    }

    .rank-num.top-1 { color: #F59E0B; }
    .rank-num.top-2 { color: #9CA3AF; }
    .rank-num.top-3 { color: #D97706; }

    /* 5. 核心声学引擎与架构说明 */
    .engine-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .tech-specs-box {
      margin-top: 24px;
      background: rgba(15, 17, 23, 0.8);
      border-left: 4px solid var(--accent-cyan);
      padding: 18px 22px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .tech-code-chip {
      color: var(--accent-cyan);
      font-weight: 600;
    }

    /* 6. 功能矩阵 (6卡片) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      transition: var(--trans-smooth);
    }

    .feature-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-normal);
    }

    .feature-tag {
      font-size: 12px;
      color: var(--accent-cyan);
      font-weight: 600;
      margin-bottom: 12px;
    }

    .feature-card h3 {
      font-size: 19px;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 7. 保障承诺 (安全体系) */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .guarantee-box {
      background: rgba(24, 27, 38, 0.7);
      border: 1px dashed var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }

    .guarantee-box h4 {
      font-size: 16px;
      margin: 12px 0 8px;
      color: var(--text-main);
    }

    .guarantee-box p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 8. 组队开黑上车流程 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-idx {
      font-size: 32px;
      font-weight: 900;
      color: rgba(124, 58, 237, 0.25);
      position: absolute;
      top: 14px;
      right: 18px;
    }

    .step-card h4 {
      font-size: 17px;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 9. 数据指标条 */
    .metric-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 24px;
      text-align: center;
    }

    .metric-num {
      font-size: 40px;
      font-weight: 900;
      color: var(--text-main);
      background: linear-gradient(180deg, #FFFFFF 0%, #A78BFA 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      letter-spacing: 0.5px;
    }

    /* 10. 用户口碑评价墙 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

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

    .reviewer-meta h5 {
      font-size: 15px;
      color: var(--text-main);
    }

    .reviewer-meta span {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 11. 会员特权与套餐比价 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }

    .price-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .price-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-neon);
      transform: scale(1.03);
      z-index: 2;
    }

    .featured-tag {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 14px;
      border-radius: var(--radius-pill);
    }

    .price-name {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .price-val {
      font-size: 36px;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
    }

    .price-val span {
      font-size: 14px;
      font-weight: 400;
      color: var(--text-sub);
    }

    .price-list {
      margin-bottom: 30px;
      flex-grow: 1;
    }

    .price-list li {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .price-list li::before {
      content: "✓";
      color: var(--accent-green);
      font-weight: bold;
    }

    /* 12. 资讯列表 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .news-img {
      width: 100%;
      height: 170px;
      object-fit: cover;
    }

    .news-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-size: 12px;
      color: var(--text-sub);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .news-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    /* 13. 常见问题手风琴 */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--trans-smooth);
    }

    .faq-item:hover, .faq-item[open] {
      border-color: var(--primary);
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: var(--text-main);
    }

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

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid rgba(46, 54, 79, 0.4);
      padding-top: 16px;
    }

    /* 14. 底部预约与收口行动区 (唯一收口) */
    .cta-banner {
      background: radial-gradient(circle at top right, rgba(124, 58, 237, 0.25), transparent 60%), #181B26;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-normal);
    }

    .cta-form {
      display: flex;
      max-width: 500px;
      margin: 28px auto 14px;
      gap: 10px;
    }

    .cta-input {
      flex-grow: 1;
      background: #0F1117;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-pill);
      padding: 14px 22px;
      color: #fff;
      font-size: 14px;
    }

    .cta-input:focus {
      border-color: var(--primary);
    }

    .cta-privacy {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 页脚 */
    .site-footer {
      background: #090B0F;
      border-top: 1px solid var(--border-color);
      padding: 64px 0 32px;
      font-size: 14px;
      color: var(--text-sub);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-col h5 {
      font-size: 16px;
      color: var(--text-main);
      margin-bottom: 20px;
      font-weight: 700;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: var(--accent-cyan);
    }

    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(46, 54, 79, 0.5);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 14px;
      font-size: 13px;
    }

    .footer-domain-note {
      color: #4B5563;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .radar-banner, .engine-layout {
        grid-template-columns: 1fr;
      }
      .category-grid, .guarantee-grid, .steps-grid, .metric-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .features-grid, .leaderboard-grid, .reviews-grid, .pricing-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .price-card.featured {
        transform: none;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-topbar {
        display: none;
      }
      .nav-links {
        display: none;
      }
      .category-grid, .guarantee-grid, .steps-grid, .metric-strip {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }