/* roulang page: index */
:root {
      --bg-dark: #0B0E14;
      --bg-card-dark: #121721;
      --bg-light: #FFFFFF;
      --bg-alt-light: #F4F6F8;
      --primary: #00E599;
      --primary-hover: #00C882;
      --accent-live: #FF3B30;
      --text-main-dark: #FFFFFF;
      --text-muted-dark: #94A3B8;
      --text-main-light: #0F172A;
      --text-muted-light: #475569;
      --text-sub: #64748B;
      --border-dark: rgba(255, 255, 255, 0.08);
      --border-light: rgba(15, 23, 42, 0.08);
      --radius: 6px;
      --transition: all 0.2s ease-out;
      --container-max: 1280px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      text-size-adjust: 100%;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-muted-dark);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }

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

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

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 32px;
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
    }

    /* 顶部信息栏 */
    .top-bar {
      background: #06080B;
      font-size: 13px;
      color: var(--text-sub);
      border-bottom: 1px solid var(--border-dark);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .live-indicator {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #E2E8F0;
    }
    .live-dot {
      width: 8px;
      height: 8px;
      background: var(--accent-live);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-live);
      animation: pulse 1.6s infinite ease-in-out;
    }
    @keyframes pulse {
      0%, 100% { transform: scale(1); opacity: 1; }
      50% { transform: scale(1.3); opacity: 0.6; }
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 14, 20, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dark);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      color: #FFFFFF;
      letter-spacing: -0.02em;
    }
    .brand-badge {
      font-size: 11px;
      font-weight: 700;
      background: var(--primary);
      color: #06080B;
      padding: 2px 6px;
      border-radius: var(--radius);
      letter-spacing: 0.05em;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: #CBD5E1;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary);
      color: #06080B;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: var(--radius);
      transition: var(--transition);
    }
    .nav-cta:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
    }

    /* 通用组件 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 28px;
      border-radius: var(--radius);
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--primary);
      color: #06080B;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.2);
      color: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 0.1em;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 34px;
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      line-height: 1.7;
      max-width: 680px;
      margin-bottom: 48px;
    }

    /* 板块结构样式规范 */
    .section-pad-dark {
      padding: 100px 0;
      background-color: var(--bg-dark);
      color: var(--text-muted-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .section-pad-dark .section-title {
      color: var(--text-main-dark);
    }
    .section-pad-light {
      padding: 100px 0;
      background-color: var(--bg-alt-light);
      color: var(--text-muted-light);
      border-bottom: 1px solid var(--border-light);
    }
    .section-pad-light .section-title {
      color: var(--text-main-light);
    }
    .section-pad-pure-white {
      padding: 100px 0;
      background-color: var(--bg-light);
      color: var(--text-muted-light);
      border-bottom: 1px solid var(--border-light);
    }
    .section-pad-pure-white .section-title {
      color: var(--text-main-light);
    }
    .section-pad-pitch-black {
      padding: 110px 0;
      background-color: #05070A;
      color: var(--text-muted-dark);
      border-bottom: 1px solid var(--border-dark);
    }

    /* 1. HERO 区块 (双栏门户) */
    .hero-section {
      position: relative;
      padding: 110px 0 100px;
      background: radial-gradient(circle at 85% 15%, rgba(0, 229, 153, 0.08) 0%, transparent 45%), var(--bg-dark);
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 52px;
      font-weight: 800;
      line-height: 1.15;
      color: #FFFFFF;
      letter-spacing: -0.02em;
      margin-bottom: 24px;
    }
    .hero-content h1 span {
      color: var(--primary);
    }
    .hero-intro {
      font-size: 16px;
      line-height: 1.75;
      color: #94A3B8;
      margin-bottom: 36px;
    }
    .hero-btn-group {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .hero-meta-points {
      display: flex;
      gap: 28px;
      padding-top: 24px;
      border-top: 1px solid var(--border-dark);
    }
    .hero-meta-item {
      display: flex;
      flex-direction: column;
    }
    .hero-meta-val {
      font-size: 22px;
      font-weight: 700;
      color: #FFFFFF;
    }
    .hero-meta-lbl {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 快捷入口网格 (Hero右侧) */
    .quick-entry-panel {
      background: var(--bg-card-dark);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: 0 16px 40px -10px rgba(0,0,0,0.5);
    }
    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--border-dark);
    }
    .panel-header h3 {
      font-size: 16px;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .panel-status {
      font-size: 12px;
      background: rgba(0, 229, 153, 0.1);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
    }
    .signal-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 16px;
    }
    .signal-card {
      background: #0B0E14;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 14px;
      transition: var(--transition);
      cursor: pointer;
    }
    .signal-card:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    .signal-type {
      font-size: 11px;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 4px;
    }
    .signal-title {
      font-size: 14px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 6px;
    }
    .signal-metric {
      font-size: 11px;
      color: var(--text-sub);
    }
    .stream-preview-box {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-dark);
    }
    .stream-preview-box img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .stream-badge {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(11, 14, 20, 0.85);
      color: #FFFFFF;
      font-size: 11px;
      padding: 3px 8px;
      border-radius: 4px;
      display: flex;
      align-items: center;
      gap: 5px;
    }

    /* 2. 观赛痛点诊断 (#pain-points) */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .pain-card {
      background: var(--bg-card-dark);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 32px 24px;
      position: relative;
      transition: var(--transition);
    }
    .pain-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }
    .pain-seq {
      font-size: 26px;
      font-weight: 800;
      color: rgba(255, 255, 255, 0.15);
      margin-bottom: 16px;
      font-family: monospace;
    }
    .pain-card h3 {
      font-size: 19px;
      color: #FFFFFF;
      margin-bottom: 12px;
      font-weight: 600;
    }
    .pain-card p {
      font-size: 14px;
      line-height: 1.65;
      color: var(--text-muted-dark);
    }

    /* 3. 架构与核心解决方案 (#about) */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .arch-img-wrap {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    }
    .arch-img-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .arch-content h2 {
      font-size: 34px;
      color: var(--text-main-light);
      margin-bottom: 20px;
      font-weight: 700;
    }
    .arch-lead {
      font-size: 16px;
      color: var(--text-muted-light);
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .arch-spec-card {
      background: #FFFFFF;
      border-left: 4px solid var(--primary);
      border-radius: 4px;
      padding: 16px 20px;
      margin-bottom: 24px;
      border-top: 1px solid var(--border-light);
      border-right: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }
    .arch-spec-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main-light);
      margin-bottom: 4px;
    }
    .arch-spec-body {
      font-size: 13px;
      color: #334155;
    }

    /* 4. 核心优势矩阵 (#advantages) */
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: var(--bg-card-dark);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 36px 28px;
      transition: var(--transition);
    }
    .adv-card:hover {
      border-color: var(--primary);
      box-shadow: 0 6px 24px rgba(0, 229, 153, 0.08);
      transform: translateY(-3px);
    }
    .adv-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius);
      background: rgba(0, 229, 153, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 20px;
    }
    .adv-card h3 {
      font-size: 19px;
      color: #FFFFFF;
      margin-bottom: 10px;
    }
    .adv-card p {
      font-size: 14px;
      color: var(--text-muted-dark);
      line-height: 1.65;
    }

    /* 5. 热门赛事与产品专区 (#matches) */
    .match-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .match-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .match-card:hover {
      box-shadow: 0 12px 30px rgba(0,0,0,0.08);
      transform: translateY(-3px);
    }
    .match-card-cover {
      position: relative;
      height: 200px;
    }
    .match-card-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .match-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 23, 42, 0.85);
      color: #FFFFFF;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .match-card-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .match-card-body h3 {
      font-size: 20px;
      color: var(--text-main-light);
      margin-bottom: 10px;
    }
    .match-card-body p {
      font-size: 14px;
      color: var(--text-muted-light);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .match-data-bar {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border-light);
      padding-top: 14px;
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 6. 深色传输链路区 (#technology) */
    .tech-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 40px;
      position: relative;
    }
    .flow-node {
      background: #0B0E14;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 28px 22px;
      position: relative;
    }
    .flow-node::after {
      content: "→";
      position: absolute;
      right: -16px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 20px;
      color: var(--primary);
    }
    .flow-node:last-child::after {
      display: none;
    }
    .node-num {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 0.05em;
      margin-bottom: 8px;
    }
    .flow-node h3 {
      font-size: 18px;
      color: #FFFFFF;
      margin-bottom: 10px;
    }
    .flow-node p {
      font-size: 13px;
      color: var(--text-muted-dark);
      line-height: 1.6;
    }

    /* 7. 多场景落地与用户故事 (#cases) */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
    }
    .case-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      color: #0F172A;
      background: #E2E8F0;
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 16px;
    }
    .case-card h3 {
      font-size: 22px;
      color: var(--text-main-light);
      margin-bottom: 14px;
    }
    .case-card p {
      font-size: 15px;
      color: var(--text-muted-light);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .case-metrics-inline {
      display: flex;
      gap: 24px;
      padding-top: 18px;
      border-top: 1px solid var(--border-light);
    }
    .c-metric strong {
      display: block;
      font-size: 20px;
      color: var(--text-main-light);
    }
    .c-metric span {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 8. 关键数据指标统计条 (#metrics) */
    .metric-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-item {
      padding: 24px 16px;
    }
    .metric-number {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.1;
      color: var(--primary);
      font-family: monospace;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 16px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 9. 真实用户与机构评价 (#testimonials) */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 14px;
      letter-spacing: 2px;
      margin-bottom: 14px;
    }
    .testi-text {
      font-size: 15px;
      color: var(--text-muted-light);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testi-avatar-box {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #334155;
      font-size: 14px;
    }
    .testi-name {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main-light);
    }
    .testi-role {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 10. 内嵌赛事资讯与动态摘要 (#news) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-card-dark);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 28px 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .news-card:hover {
      border-color: var(--primary);
    }
    .news-date {
      font-size: 12px;
      color: var(--text-sub);
      margin-bottom: 8px;
    }
    .news-card h3 {
      font-size: 18px;
      color: #FFFFFF;
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 14px;
      color: var(--text-muted-dark);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .news-anchor {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 11. 常见技术与服务疑问 FAQ (#faq) */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 17px;
      font-weight: 600;
      color: var(--text-main-light);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      color: var(--text-sub);
      transition: transform 0.2s ease;
    }
    details[open] .faq-icon {
      transform: rotate(45deg);
    }
    .faq-content {
      padding: 0 24px 20px 24px;
      font-size: 15px;
      color: var(--text-muted-light);
      line-height: 1.7;
    }

    /* 12. 底线转化容器 (#conversion) */
    .cta-box {
      background: radial-gradient(circle at 50% 50%, rgba(0, 229, 153, 0.12) 0%, transparent 60%), #05070A;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 72px 32px;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }
    .cta-box h2 {
      font-size: 38px;
      color: #FFFFFF;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }
    .cta-box p {
      font-size: 16px;
      color: #94A3B8;
      max-width: 620px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 520px;
      margin: 0 auto 28px;
    }
    .cta-input {
      flex: 1;
      padding: 14px 18px;
      background: #121721;
      border: 1px solid var(--border-dark);
      color: #FFFFFF;
      border-radius: var(--radius);
      font-size: 15px;
    }
    .cta-input:focus {
      border-color: var(--primary);
    }
    .cta-trust-strip {
      display: flex;
      justify-content: center;
      gap: 32px;
      font-size: 13px;
      color: var(--text-sub);
      flex-wrap: wrap;
    }

    /* 统一页脚 */
    .site-footer {
      background: #06080B;
      border-top: 1px solid var(--border-dark);
      padding: 80px 0 32px;
      color: var(--text-sub);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr repeat(3, 1fr);
      gap: 48px;
      margin-bottom: 60px;
    }
    .footer-brand h4 {
      font-size: 20px;
      color: #FFFFFF;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 20px;
      max-width: 320px;
    }
    .footer-col h5 {
      font-size: 15px;
      color: #FFFFFF;
      margin-bottom: 18px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-dark);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .pain-grid { grid-template-columns: repeat(2, 1fr); }
      .adv-grid { grid-template-columns: repeat(2, 1fr); }
      .match-grid { grid-template-columns: 1fr; }
      .tech-flow { grid-template-columns: repeat(2, 1fr); }
      .flow-node::after { display: none; }
      .metric-bar { grid-template-columns: repeat(2, 1fr); }
      .news-grid { grid-template-columns: 1fr; }
      .testi-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hero-content h1 { font-size: 36px; }
      .section-title { font-size: 28px; }
      .pain-grid { grid-template-columns: 1fr; }
      .adv-grid { grid-template-columns: 1fr; }
      .arch-grid { grid-template-columns: 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .tech-flow { grid-template-columns: 1fr; }
      .metric-bar { grid-template-columns: 1fr; }
      .cta-form { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; align-items: flex-start; }
    }