/* roulang page: index */
:root {
      --bg-darkest: #050811;
      --bg-main: #0a0f1d;
      --bg-card: rgba(17, 24, 39, 0.75);
      --bg-card-hover: rgba(26, 36, 56, 0.9);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-cyan: rgba(0, 242, 254, 0.3);
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-dim: #64748b;
      --cyan-bright: #00f2fe;
      --cyan-glow: rgba(0, 242, 254, 0.25);
      --blue-accent: #4facfe;
      --green-status: #00e676;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

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

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

    /* 顶部导航与状态条 */
    .header-fixed {
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      background: rgba(10, 15, 29, 0.85);
      border-bottom: 1px solid var(--border-subtle);
    }

    .top-status-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: var(--text-muted);
      padding: 6px 0;
    }

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

    .status-left span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-right: 18px;
    }

    .indicator-dot {
      width: 7px;
      height: 7px;
      background: var(--green-status);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--green-status);
      display: inline-block;
    }

    .top-status-links a {
      margin-left: 16px;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .top-status-links a:hover {
      color: var(--cyan-bright);
    }

    .navbar-main {
      padding: 16px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 700;
      font-size: 20px;
      letter-spacing: -0.5px;
      color: #fff;
    }

    .brand-symbol {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--cyan-bright), var(--blue-accent));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
    }

    .nav-menu {
      display: flex;
      list-style: none;
      gap: 26px;
    }

    .nav-menu a {
      font-size: 15px;
      color: var(--text-muted);
      transition: var(--transition);
      position: relative;
      padding: 4px 0;
    }

    .nav-menu a:hover {
      color: #fff;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan-bright);
      transition: var(--transition);
    }

    .nav-menu a:hover::after {
      width: 100%;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 11px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      gap: 8px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--cyan-bright) 0%, var(--blue-accent) 100%);
      color: #050811;
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.55);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.03);
      border-color: var(--cyan-bright);
      color: var(--cyan-bright);
      box-shadow: inset 0 0 12px rgba(0, 242, 254, 0.05);
    }

    .btn-ghost:hover {
      background: rgba(0, 242, 254, 0.12);
      transform: translateY(-2px);
      color: #fff;
    }

    .btn-sm {
      padding: 7px 16px;
      font-size: 13px;
    }

    /* Section 通用规范 */
    section {
      padding: 96px 0;
      position: relative;
    }

    .section-header {
      margin-bottom: 56px;
    }

    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .tag-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--cyan-bright);
      background: rgba(0, 242, 254, 0.08);
      border: 1px solid rgba(0, 242, 254, 0.2);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

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

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      padding: 32px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .glass-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-cyan);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 15px rgba(0, 242, 254, 0.15);
      transform: translateY(-3px);
    }

    /* 1. Hero 叙事板块 */
    #hero-banner {
      min-height: 88vh;
      display: flex;
      align-items: center;
      padding: 120px 0 80px 0;
      background: radial-gradient(circle at 80% 20%, rgba(79, 172, 254, 0.15), transparent 50%),
                  radial-gradient(circle at 10% 80%, rgba(0, 242, 254, 0.08), transparent 45%),
                  url('/assets/images/28d993202bc1dae1.jpg') center/cover no-repeat;
      position: relative;
    }

    #hero-banner::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(180deg, rgba(10, 15, 29, 0.88) 0%, rgba(10, 15, 29, 0.96) 100%);
      backdrop-filter: blur(4px);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
    }

    .hero-h1 {
      font-size: 52px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
      letter-spacing: -1px;
      background: linear-gradient(135deg, #ffffff 40%, var(--cyan-bright) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 18px;
      color: #cbd5e1;
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 820px;
    }

    .hero-btn-group {
      display: flex;
      gap: 18px;
      align-items: center;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-metrics-floating {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 32px;
    }

    .float-metric-item h4 {
      font-size: 28px;
      font-weight: 700;
      color: var(--cyan-bright);
      margin-bottom: 4px;
    }

    .float-metric-item p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 2. 架构与产品介绍 */
    #intro-ecosystem {
      background-color: var(--bg-darkest);
    }

    .grid-split-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }

    .diagram-panel {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    }

    .diagram-panel img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .param-verify-tag {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background: rgba(10, 15, 29, 0.9);
      border: 1px solid var(--border-cyan);
      border-radius: 8px;
      padding: 12px 18px;
      backdrop-filter: blur(8px);
    }

    .param-verify-tag .num {
      color: var(--green-status);
      font-weight: 700;
      font-size: 18px;
    }

    .feature-step-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .feature-step-item {
      display: flex;
      gap: 18px;
    }

    .step-badge {
      width: 40px;
      height: 40px;
      flex-shrink: 0;
      border-radius: 10px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid var(--border-cyan);
      color: var(--cyan-bright);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .feature-step-item h3 {
      font-size: 18px;
      margin-bottom: 6px;
    }

    .feature-step-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 核心优势 6卡片网格 */
    .grid-3-col {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .strength-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(0, 242, 254, 0.08);
      border: 1px solid rgba(0, 242, 254, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--cyan-bright);
      font-weight: 700;
    }

    .strength-tag {
      display: inline-block;
      font-size: 12px;
      color: var(--blue-accent);
      background: rgba(79, 172, 254, 0.1);
      padding: 2px 8px;
      border-radius: 4px;
      margin-top: 14px;
    }

    /* 4. 场景解决方案 3卡片非对称 */
    .solution-card-body {
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .solution-img-wrapper {
      height: 220px;
      border-radius: 12px;
      overflow: hidden;
      margin-bottom: 24px;
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

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

    .glass-card:hover .solution-img-wrapper img {
      transform: scale(1.04);
    }

    .solution-features {
      list-style: none;
      margin: 18px 0;
      flex-grow: 1;
    }

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

    .solution-features li::before {
      content: '✓';
      color: var(--cyan-bright);
      font-weight: bold;
    }

    .tech-badges {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
      margin-bottom: 20px;
    }

    .badge-chip {
      font-size: 11px;
      background: rgba(255, 255, 255, 0.06);
      padding: 3px 8px;
      border-radius: 4px;
      color: #cbd5e1;
    }

    /* 5. 深色核心底座架构拓扑 */
    #dark-architecture {
      background: radial-gradient(circle at 50% 50%, #0d1527 0%, #050811 100%);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }

    .topo-container {
      background: rgba(10, 15, 29, 0.6);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 48px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .topo-node {
      border: 1px dashed rgba(0, 242, 254, 0.3);
      border-radius: var(--radius-sm);
      padding: 24px;
      background: rgba(17, 24, 39, 0.5);
      text-align: center;
    }

    .topo-node h4 {
      color: var(--cyan-bright);
      font-size: 17px;
      margin-bottom: 10px;
    }

    .topo-node p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 6. 行业应用与客户故事 */
    .story-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 64px;
    }

    .story-row:last-child {
      margin-bottom: 0;
    }

    .story-row.reverse {
      direction: rtl;
    }

    .story-row.reverse .story-text {
      direction: ltr;
    }

    .story-media {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      position: relative;
    }

    .story-media img {
      width: 100%;
      height: 320px;
      object-fit: cover;
    }

    /* 7. 关键数据统计指标通栏 */
    #metrics-counter {
      background: linear-gradient(180deg, #070b16 0%, #0d1424 100%);
      padding: 60px 0;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }

    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .metric-cell .count {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.1;
      background: linear-gradient(135deg, #ffffff 20%, var(--cyan-bright) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

    .metric-cell .lbl {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 8. 合作伙伴评价墙 */
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: 24px;
    }

    .user-avatar-slot {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #2d3748, #4a5568);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--cyan-bright);
      font-weight: bold;
    }

    .stars {
      color: #fbbf24;
      font-size: 14px;
      margin-bottom: 12px;
    }

    /* 9. 体育数字化动态与资讯 */
    .news-card-inner {
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .news-meta {
      font-size: 13px;
      color: var(--text-dim);
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
    }

    /* 10. 服务梯度与合作模式 */
    .pricing-card {
      position: relative;
    }

    .pricing-featured {
      border-color: var(--cyan-bright);
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.25);
    }

    .ribbon-tag {
      position: absolute;
      top: 16px;
      right: 16px;
      background: linear-gradient(135deg, var(--cyan-bright), var(--blue-accent));
      color: #050811;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
    }

    .price-num {
      font-size: 32px;
      font-weight: 700;
      color: #fff;
      margin: 16px 0 24px 0;
    }

    /* 11. FAQ 手风琴折叠交互 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item summary {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      color: #fff;
    }

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

    .faq-item summary::after {
      content: '+';
      font-size: 20px;
      color: var(--cyan-bright);
      transition: transform 0.2s;
    }

    .faq-item[open] summary::after {
      transform: rotate(45deg);
    }

    .faq-content {
      padding: 0 24px 20px 24px;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.8;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* 12. 底部转化 CTA */
    #action-cta {
      background: radial-gradient(circle at 50% 30%, rgba(0, 242, 254, 0.12) 0%, #050811 70%);
      padding: 96px 0 110px 0;
    }

    .cta-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      background: rgba(17, 24, 39, 0.6);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    }

    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      background: rgba(10, 15, 29, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-sm);
      padding: 13px 18px;
      color: #fff;
      font-size: 14px;
      transition: var(--transition);
      outline: none;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--cyan-bright);
      box-shadow: 0 0 12px rgba(0, 242, 254, 0.3);
    }

    /* 页脚设计 */
    .site-footer {
      background: #03050a;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 70px 0 30px 0;
      color: var(--text-dim);
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand p {
      margin-top: 14px;
      max-width: 340px;
      line-height: 1.7;
    }

    .footer-col h5 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 20px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col a:hover {
      color: var(--cyan-bright);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-3-col, .metrics-bar-grid, .topo-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-h1 {
        font-size: 40px;
      }
    }

    @media (max-width: 768px) {
      .grid-split-2, .grid-3-col, .metrics-bar-grid, .topo-container, .story-row, .cta-wrapper {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .nav-menu {
        display: none;
      }
      .top-status-bar {
        display: none;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .hero-metrics-floating {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      section {
        padding: 64px 0;
      }
      .glass-card {
        padding: 24px;
      }
    }

    @media (max-width: 375px) {
      .hero-h1 {
        font-size: 26px;
      }
      .btn {
        width: 100%;
      }
    }