/* roulang page: index */
:root {
      --bg-dark: #0a0f1d;
      --bg-dark-card: #12192c;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --primary: #00e599;
      --primary-hover: #00c984;
      --primary-light: rgba(0, 229, 153, 0.12);
      --accent-blue: #2563eb;
      --accent-cyan: #38bdf8;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #e2e8f0;
      --text-light-muted: #94a3b8;
      --border-light: #e2e8f0;
      --border-dark: rgba(255, 255, 255, 0.08);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(10, 15, 29, 0.04);
      --shadow-md: 0 12px 30px rgba(10, 15, 29, 0.08);
      --shadow-glow: 0 0 25px rgba(0, 229, 153, 0.28);
      --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    }

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

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

    body {
      font-family: var(--font-main);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    button, input, select {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* TopBar */
    .topbar {
      background-color: #060913;
      color: var(--text-light-muted);
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding: 8px 0;
    }
    .topbar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-left span, .topbar-right span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-right: 18px;
    }
    .topbar-badge {
      background: rgba(0, 229, 153, 0.15);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
    }

    /* Main Nav */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-light);
      transition: all 0.3s ease;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--bg-dark);
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--bg-dark), #1d2b4f);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      box-shadow: 0 4px 10px rgba(0, 229, 153, 0.2);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: #334155;
      padding: 6px 2px;
      position: relative;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--accent-blue);
    }
    .nav-links a:hover::after, .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent-blue);
      border-radius: 2px;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 22px;
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-primary {
      background-color: var(--primary);
      color: #06241a;
      box-shadow: 0 4px 14px rgba(0, 229, 153, 0.35);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: var(--shadow-glow);
    }
    .btn-dark {
      background-color: var(--bg-dark);
      color: #ffffff;
      border-color: rgba(255, 255, 255, 0.15);
    }
    .btn-dark:hover {
      background-color: #16203a;
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--border-light);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--accent-blue);
      color: var(--accent-blue);
    }
    .nav-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .nav-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* Section Global Headers */
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px;
    }
    .section-eyebrow {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--accent-blue);
      background: rgba(37, 99, 235, 0.08);
      padding: 4px 12px;
      border-radius: 100px;
      margin-bottom: 14px;
    }
    .section-eyebrow.green {
      color: var(--primary);
      background: rgba(0, 229, 153, 0.12);
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.3;
      color: var(--bg-dark);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 1. Hero Section */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, #162444 0%, #0a0f1d 70%);
      color: #ffffff;
      padding: 72px 0 96px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: radial-gradient(rgba(0, 229, 153, 0.08) 1px, transparent 1px);
      background-size: 32px 32px;
      pointer-events: none;
      opacity: 0.7;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-content h1 {
      font-size: 2.9rem;
      font-weight: 800;
      line-height: 1.22;
      letter-spacing: -0.8px;
      margin-bottom: 22px;
    }
    .hero-content h1 span {
      background: linear-gradient(120deg, #ffffff 30%, var(--primary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-light-muted);
      line-height: 1.8;
      margin-bottom: 34px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 42px;
    }
    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    .hero-feat-item {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .hero-feat-num {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
    }
    .hero-feat-label {
      font-size: 0.85rem;
      color: var(--text-light-muted);
    }
    .hero-visual {
      position: relative;
    }
    .hero-card-frame {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(0, 229, 153, 0.3);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), var(--shadow-glow);
      background: #0d1426;
    }
    .hero-img {
      width: 100%;
      height: 440px;
      object-fit: cover;
      opacity: 0.92;
      transition: transform 0.6s ease;
    }
    .hero-card-frame:hover .hero-img {
      transform: scale(1.02);
    }
    .hero-float-tag {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(10, 15, 29, 0.85);
      backdrop-filter: blur(12px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.12);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .hero-live-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8125rem;
      color: var(--primary);
      font-weight: 600;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 10px var(--primary);
    }

    /* 2. Security & Compliance Banner */
    .sec-trust-bar {
      background: #ffffff;
      padding: 36px 0;
      border-bottom: 1px solid var(--border-light);
    }
    .trust-strip {
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 24px;
    }
    .trust-col {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .trust-icon-box {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(37, 99, 235, 0.08);
      color: var(--accent-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
    }
    .trust-meta h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .trust-meta p {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 3. Tech推演板块 (#about-tech) */
    .section-tech {
      padding: 96px 0;
      background: #ffffff;
    }
    .tech-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 56px;
      align-items: center;
    }
    .tech-visual-col {
      position: relative;
    }
    .tech-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-md);
    }
    .tech-img-box img {
      width: 100%;
      height: 460px;
      object-fit: cover;
    }
    .tech-floating-card {
      position: absolute;
      bottom: -24px;
      right: -24px;
      background: var(--bg-dark);
      color: #ffffff;
      padding: 20px 26px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(0, 229, 153, 0.3);
      box-shadow: var(--shadow-md);
      max-width: 280px;
    }
    .tech-floating-card .num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
    }
    .tech-floating-card .sub {
      font-size: 0.85rem;
      color: var(--text-light-muted);
    }
    .tech-content-col h2 {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--bg-dark);
      margin-bottom: 20px;
      line-height: 1.3;
    }
    .tech-content-col p {
      color: var(--text-muted);
      margin-bottom: 24px;
      font-size: 1.025rem;
    }
    .tech-specs-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 28px;
    }
    .spec-item {
      padding: 16px 18px;
      background: var(--bg-light);
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--primary);
    }
    .spec-item h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 4px;
    }
    .spec-item p {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    /* 4. Features 六大矩阵 (#features) */
    .section-features {
      padding: 96px 0;
      background: var(--bg-light);
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .feature-card {
      background: #ffffff;
      padding: 34px 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(37, 99, 235, 0.3);
    }
    .feat-icon-top {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      background: rgba(37, 99, 235, 0.08);
      color: var(--accent-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
    }
    .feature-card:nth-child(2) .feat-icon-top,
    .feature-card:nth-child(5) .feat-icon-top {
      background: rgba(0, 229, 153, 0.12);
      color: #059669;
    }
    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 12px;
    }
    .feature-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .feat-meta-tag {
      font-size: 0.785rem;
      font-weight: 600;
      color: #475569;
      background: #f1f5f9;
      padding: 4px 10px;
      border-radius: 4px;
      align-self: flex-start;
    }

    /* 5. 产品深度矩阵 (#products) */
    .section-products {
      padding: 96px 0;
      background: #ffffff;
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .product-box {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      background: #ffffff;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .product-box:hover {
      border-color: var(--accent-blue);
      box-shadow: var(--shadow-md);
    }
    .product-thumb {
      height: 220px;
      overflow: hidden;
      background: #0f172a;
    }
    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-box:hover .product-thumb img {
      transform: scale(1.05);
    }
    .product-body {
      padding: 30px 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .product-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent-blue);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .product-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 12px;
    }
    .product-intro {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 22px;
    }
    .product-checklist {
      list-style: none;
      margin-bottom: 28px;
      flex-grow: 1;
    }
    .product-checklist li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.875rem;
      color: #334155;
      margin-bottom: 10px;
      line-height: 1.5;
    }
    .product-checklist li::before {
      content: "✓";
      color: var(--primary-hover);
      font-weight: 900;
    }

    /* 6. 深色沉浸式案例决策理念 (#case-study) */
    .section-cases {
      background: radial-gradient(circle at 20% 30%, #17233f 0%, #080c16 80%);
      color: #ffffff;
      padding: 100px 0;
      position: relative;
    }
    .case-container {
      display: grid;
      grid-template-columns: 1fr 1.15fr;
      gap: 60px;
      align-items: center;
    }
    .case-left h2 {
      font-size: 2.3rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 22px;
      color: #ffffff;
    }
    .case-left p {
      color: var(--text-light-muted);
      font-size: 1.05rem;
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .case-quote-box {
      border-left: 3px solid var(--primary);
      padding-left: 20px;
      margin-bottom: 32px;
      font-style: italic;
      color: var(--text-light);
    }
    .case-radar-preview {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.1);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
    }
    .case-radar-preview img {
      width: 100%;
      height: 280px;
      object-fit: cover;
    }
    .case-metrics-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .metric-card-dark {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px 28px;
      transition: all 0.3s ease;
    }
    .metric-card-dark:hover {
      border-color: var(--primary);
      transform: translateX(6px);
    }
    .metric-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 10px;
    }
    .metric-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #ffffff;
    }
    .metric-val {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
    }
    .metric-desc {
      font-size: 0.885rem;
      color: var(--text-light-muted);
      line-height: 1.6;
    }

    /* 7. 用户故事与教练组叙事 (#stories) */
    .section-stories {
      padding: 96px 0;
      background: #ffffff;
    }
    .story-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 36px;
    }
    .story-card {
      background: var(--bg-light);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 36px;
      display: flex;
      gap: 24px;
      align-items: flex-start;
      position: relative;
    }
    .story-card::before {
      content: "“";
      position: absolute;
      top: 16px;
      right: 24px;
      font-size: 4rem;
      line-height: 1;
      color: rgba(100, 116, 139, 0.12);

      font-family: serif;
      pointer-events: none;
    }
    .story-avatar {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      overflow: hidden;
      flex-shrink: 0;
      border: 3px solid #ffffff;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }
    .story-avatar img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-body {
      flex: 1;
    }
    .story-quote {
      font-size: 0.965rem;
      color: var(--text-main);
      line-height: 1.75;
      margin-bottom: 18px;
    }
    .story-author {
      font-size: 1rem;
      font-weight: 700;
      color: var(--bg-dark);
    }
    .story-role {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .story-tag {
      display: inline-block;
      font-size: 0.775rem;
      font-weight: 600;
      color: #047857;
      background: #d1fae5;
      padding: 2px 10px;
      border-radius: 4px;
    }

    /* 8. 全网赛事数据统计条 (#stats) */
    .section-stats {
      background: #0d1527;
      color: #ffffff;
      padding: 60px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .stats-counter-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-counter-item {
      padding: 0 16px;
      position: relative;
    }
    .stat-counter-item:not(:last-child)::after {
      content: "";
      position: absolute;
      right: 0;
      top: 15%;
      height: 70%;
      width: 1px;
      background: rgba(255, 255, 255, 0.1);
    }
    .counter-value {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 6px;
      font-family: inherit;
    }
    .counter-title {
      font-size: 1rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 4px;
    }
    .counter-note {
      font-size: 0.8125rem;
      color: var(--text-light-muted);
    }

    /* 9. 多端客户评价与口碑验证 (#reviews) */
    .section-reviews {
      padding: 96px 0;
      background: var(--bg-light);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #f59e0b;
      font-size: 1.05rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .review-text {
      font-size: 0.925rem;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 22px;
      flex-grow: 1;
    }
    .reviewer-meta {
      border-top: 1px solid var(--border-light);
      padding-top: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .reviewer-name {
      font-size: 0.925rem;
      font-weight: 700;
      color: var(--bg-dark);
    }
    .reviewer-org {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .review-cycle-badge {
      font-size: 0.75rem;
      color: var(--accent-blue);
      background: rgba(37, 99, 235, 0.08);
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 10. 资讯与算法动态摘要 (#news) */
    .section-news {
      padding: 96px 0;
      background: #ffffff;
    }
    .news-layout-grid {
      display: grid;
      grid-template-columns: 1.15fr 1fr;
      gap: 36px;
    }
    .news-lead-card {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .news-lead-thumb {
      height: 250px;
      overflow: hidden;
    }
    .news-lead-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-lead-body {
      padding: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-lead-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-lead-desc {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .news-sub-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .news-sub-item {
      padding: 20px 22px;
      background: var(--bg-light);
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--accent-blue);
      transition: background 0.2s ease;
    }
    .news-sub-item:hover {
      background: #f1f5f9;
    }
    .news-sub-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 6px;
    }
    .news-sub-tag {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--accent-blue);
      background: #e0f2fe;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .news-sub-time {
      font-size: 0.785rem;
      color: var(--text-muted);
    }
    .news-sub-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 6px;
      line-height: 1.4;
    }
    .news-sub-excerpt {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 11. 对比区：传统统计 vs 体育AI (#comparison) */
    .section-comparison {
      padding: 96px 0;
      background: var(--bg-light);
    }
    .comparison-wrapper {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comp-table th, .comp-table td {
      padding: 20px 24px;
      border-bottom: 1px solid var(--border-light);
    }
    .comp-table th {
      background: #f8fafc;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--bg-dark);
    }
    .comp-table th.col-ai {
      background: rgba(0, 229, 153, 0.1);
      color: #065f46;
      border-top: 3px solid var(--primary);
    }
    .comp-table td.col-ai {
      background: rgba(0, 229, 153, 0.04);
      font-weight: 600;
      color: #047857;
    }
    .comp-dim-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--bg-dark);
    }
    .comp-dim-desc {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 12. FAQ 手风琴 (#faq) */
    .section-faq {
      padding: 96px 0;
      background: #ffffff;
    }
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
      background: var(--bg-light);
      transition: all 0.25s ease;
    }
    .faq-item.active {
      border-color: var(--accent-blue);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
    }
    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--bg-dark);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--accent-blue);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-content {
      display: none;
      padding: 0 24px 22px;
      font-size: 0.935rem;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .faq-item.active .faq-content {
      display: block;
    }

    /* 13. 行动号召与合作表单 (#contact) */
    .section-contact {
      padding: 96px 0;
      background: radial-gradient(circle at top right, #1a2744 0%, #0a0f1d 75%);
      color: #ffffff;
    }
    .contact-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 48px 52px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 52px;
    }
    .contact-info-col h2 {
      font-size: 2.1rem;
      font-weight: 800;
      color: #ffffff;
      line-height: 1.3;
      margin-bottom: 18px;
    }
    .contact-info-col p {
      color: var(--text-light-muted);
      font-size: 1.025rem;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .contact-badges {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .contact-badge-item {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 0.9rem;
      color: var(--text-light);
    }
    .contact-badge-icon {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: rgba(0, 229, 153, 0.15);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }
    .contact-form-col {
      background: #090e1b;
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-dark);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: #131b2e;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-sm);
      color: #ffffff;
      font-size: 0.925rem;
      outline: none;
      transition: border-color 0.25s ease;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 229, 153, 0.18);
    }
    select.form-control option {
      background: #131b2e;
      color: #ffffff;
    }

    /* Footer */
    .site-footer {
      background: #060913;
      color: var(--text-light-muted);
      padding: 72px 0 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 56px;
    }
    .footer-brand h3 {
      font-size: 1.3rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.75;
      font-size: 0.875rem;
      color: #94a3b8;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94a3b8;
    }
    .footer-links a:hover {
      color: var(--primary);
      padding-left: 4px;
    }
    .footer-contact-item {
      margin-bottom: 12px;
      line-height: 1.6;
      font-size: 0.85rem;
    }
    .footer-contact-item strong {
      color: #e2e8f0;
      display: block;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
    }
    .footer-copy a {
      color: var(--primary);
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .tech-grid {
        grid-template-columns: 1fr;
      }
      .case-container {
        grid-template-columns: 1fr;
      }
      .features-grid, .products-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .news-layout-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .nav-links, .nav-actions .btn-outline {
        display: none;
      }
      .nav-toggle {
        display: block;
      }
      .hero-content h1 {
        font-size: 2.15rem;
      }
      .features-grid, .products-grid, .reviews-grid, .story-card-grid {
        grid-template-columns: 1fr;
      }
      .stats-counter-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
      }
      .stat-counter-item:nth-child(2)::after {
        display: none;
      }
      .contact-card {
        grid-template-columns: 1fr;
        padding: 32px 24px;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .mobile-menu-drawer {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-light);
        padding: 24px;
        box-shadow: var(--shadow-md);
      }
      .mobile-menu-drawer.open {
        display: block;
      }
      .mobile-menu-drawer ul {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 16px;
      }
      .mobile-menu-drawer a {
        font-size: 1rem;
        font-weight: 600;
        color: var(--text-main);
      }
    }