/* roulang page: index */
:root {
      --primary: #FF5500;
      --primary-hover: #E04B00;
      --accent-green: #00E575;
      --bg-dark: #12151B;
      --bg-dark-card: #1A1E26;
      --bg-light: #F4F5F7;
      --bg-white: #FFFFFF;
      --text-main: #1A1D21;
      --text-muted: #5A6270;
      --text-light: #8C93A0;
      --border-color: #E2E4E8;
      --border-dark: rgba(255, 255, 255, 0.1);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-family);
      background-color: var(--bg-white);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

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

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .section {
      padding: 80px 0;
    }

    .section-dark {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }

    .section-gray {
      background-color: var(--bg-light);
    }

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

    .section-header.text-center {
      text-align: center;
    }

    .tag-badge {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      color: var(--primary);
      background-color: rgba(255, 85, 0, 0.1);
      padding: 4px 12px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
    }

    .section-dark .tag-badge {
      color: var(--accent-green);
      background-color: rgba(0, 229, 117, 0.12);
    }

    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 720px;
      line-height: 1.7;
    }

    .section-dark .section-subtitle {
      color: var(--text-light);
    }

    .text-center .section-subtitle {
      margin: 0 auto;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(255, 85, 0, 0.3);
    }

    .btn-outline {
      background-color: transparent;
      border-color: var(--border-color);
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--text-main);
      background-color: rgba(0, 0, 0, 0.02);
    }

    .btn-outline-white {
      background-color: transparent;
      border-color: var(--border-dark);
      color: #FFFFFF;
    }

    .btn-outline-white:hover {
      border-color: #FFFFFF;
      background-color: rgba(255, 255, 255, 0.05);
    }

    /* 顶部通栏 */
    .top-bar {
      background-color: #0A0C0E;
      color: var(--text-light);
      font-size: 0.8125rem;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-bar-notice {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-green);
      border-radius: 50%;
      display: inline-block;
    }

    .header-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary) 0%, #FF8533 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-weight: 900;
      font-size: 1.2rem;
    }

    .logo-text {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-item a {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--text-muted);
    }

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

    /* Section 1: Hero & Metrics */
    .hero-banner {
      position: relative;
      background-color: var(--bg-dark);
      background-image: linear-gradient(rgba(18, 21, 27, 0.88), rgba(18, 21, 27, 0.95)), url('/assets/images/Data-Analytics-in-Sports-Game-Changing-Insight.jpg');
      background-size: cover;
      background-position: center;
      padding: 100px 0 80px;
      color: #FFFFFF;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    .hero-h1 span {
      color: var(--primary);
    }

    .hero-desc {
      font-size: 1.0625rem;
      color: var(--text-light);
      margin-bottom: 32px;
      line-height: 1.8;
      max-width: 620px;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 40px;
    }

    .metrics-panel {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
    }

    .metrics-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      border-bottom: 1px solid var(--border-dark);
      padding-bottom: 16px;
    }

    .metrics-header h3 {
      font-size: 1.125rem;
      font-weight: 700;
    }

    .live-tag {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.75rem;
      color: var(--accent-green);
      font-weight: 600;
    }

    .metrics-grid-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .metric-item {
      padding: 16px;
      background: rgba(255, 255, 255, 0.03);
      border-radius: var(--radius-sm);
    }

    .metric-value {
      font-size: 1.875rem;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.2;
      margin-bottom: 4px;
      font-feature-settings: "tnum";
    }

    .metric-label {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* Section 2: Brand & Architecture */
    .brand-intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .brand-content h2 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 20px;
      line-height: 1.3;
    }

    .brand-content p {
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.8;
    }

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

    .brand-feature-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }

    .feature-check {
      color: var(--primary);
      font-weight: 900;
      margin-top: 2px;
    }

    .brand-media-card {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .brand-media-card img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .media-card-badge {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(18, 21, 27, 0.9);
      backdrop-filter: blur(8px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* Section 3: 6 Service Cards */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 85, 0, 0.3);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background-color: rgba(255, 85, 0, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .service-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Section 4: Products Terminals */
    .terminal-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .terminal-card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }

    .terminal-thumb {
      height: 200px;
      overflow: hidden;
      background-color: #000;
    }

    .terminal-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .terminal-card:hover .terminal-thumb img {
      transform: scale(1.05);
    }

    .terminal-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .terminal-body h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .terminal-body p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      flex: 1;
    }

    .terminal-specs {
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
      display: flex;
      justify-content: space-between;
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* Section 5: Benchmark */
    .benchmark-table-box {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }

    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .benchmark-table th, .benchmark-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-dark);
    }

    .benchmark-table th {
      background: rgba(255, 255, 255, 0.02);
      font-size: 0.9375rem;
      color: var(--text-light);
      font-weight: 600;
    }

    .benchmark-table td {
      font-size: 0.9375rem;
      color: #FFFFFF;
    }

    .benchmark-highlight {
      color: var(--accent-green);
      font-weight: 700;
    }

    .benchmark-dim {
      color: var(--text-light);
    }

    /* Section 6: Milestones */
    .timeline {
      position: relative;
      border-left: 2px solid rgba(255, 255, 255, 0.15);
      margin-left: 20px;
      padding-left: 32px;
      display: flex;
      flex-direction: column;
      gap: 40px;
    }

    .timeline-node {
      position: relative;
    }

    .timeline-dot {
      position: absolute;
      left: -41px;
      top: 4px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--primary);
      border: 3px solid var(--bg-dark);
    }

    .timeline-date {
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--accent-green);
      margin-bottom: 6px;
    }

    .timeline-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 8px;
    }

    .timeline-desc {
      font-size: 0.9375rem;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* Section 7: Stats Ribbon */
    .stats-ribbon {
      background: #0B0D11;
      padding: 48px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
      color: #FFFFFF;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .stat-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
      line-height: 1;
    }

    .stat-desc {
      font-size: 0.875rem;
      color: var(--text-light);
    }

    /* Section 8: Stories Tab */
    .stories-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .story-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .story-role {
      font-size: 0.8125rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 8px;
    }

    .story-card h3 {
      font-size: 1.1875rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .story-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .story-result {
      font-size: 0.8125rem;
      background: var(--bg-light);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      color: var(--text-main);
      font-weight: 600;
    }

    /* Section 9: Reviews */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .review-stars {
      color: #FFB800;
      margin-bottom: 12px;
      font-size: 0.875rem;
    }

    .review-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

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

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--bg-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }

    .reviewer-name {
      font-size: 0.9375rem;
      font-weight: 700;
    }

    .reviewer-tag {
      font-size: 0.75rem;
      color: var(--text-light);
    }

    /* Section 10: News Digest */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .news-thumb {
      height: 180px;
    }

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

    .news-content {
      padding: 20px;
    }

    .news-date {
      font-size: 0.75rem;
      color: var(--text-light);
      margin-bottom: 8px;
    }

    .news-content h3 {
      font-size: 1.0625rem;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .news-content p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 11: Security & Compliance */
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .security-card {
      padding: 24px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      text-align: center;
    }

    .security-icon {
      font-size: 2rem;
      color: var(--accent-green);
      margin-bottom: 16px;
    }

    .security-card h3 {
      font-size: 1.0625rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #FFFFFF;
    }

    .security-card p {
      font-size: 0.8125rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* Section 12: FAQ & Form */
    .faq-form-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: start;
    }

    .accordion-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: var(--bg-white);
      overflow: hidden;
    }

    .accordion-header {
      padding: 18px 20px;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
    }

    .accordion-body {
      padding: 0 20px 18px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .form-box {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
    }

    .form-box h3 {
      font-size: 1.375rem;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .form-box p {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      background: #FFFFFF;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 85, 0, 0.15);
    }

    .form-submit-btn {
      width: 100%;
      padding: 14px;
      font-size: 1rem;
      margin-top: 8px;
    }

    .form-tips {
      margin-top: 12px;
      font-size: 0.75rem;
      color: var(--text-light);
      text-align: center;
    }

    /* Footer */
    .site-footer {
      background-color: #0A0C0E;
      color: var(--text-light);
      padding: 60px 0 30px;
      border-top: 1px solid var(--border-dark);
      font-size: 0.875rem;
    }

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

    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #FFFFFF;
      font-size: 0.9375rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    .copyright {
      color: var(--text-light);
    }

    .icp-info {
      color: var(--text-light);
    }

    /* 移动端菜单按钮与响应式 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .brand-intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .service-grid, .terminal-grid, .stories-grid, .review-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .security-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
      }
      .faq-form-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .header-inner {
        height: 64px;
      }
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        gap: 16px;
      }
      .nav-menu.active {
        display: flex;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .service-grid, .terminal-grid, .stories-grid, .review-grid, .news-grid, .security-grid, .stats-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .benchmark-table-box {
        overflow-x: auto;
      }
      .benchmark-table {
        min-width: 600px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }