/* roulang page: index */
:root {
      --primary: #7B2FF7;
      --accent-orange: #FF5E13;
      --deep-bg: #0F0F12;
      --cold-white: #F4F4F9;
      --neon-cyan: #00F0B5;
      --text-light: #FFFFFF;
      --text-muted: #B0B0C0;
      --text-dark: #1A1A1E;
      --card-shadow-light: 0 4px 24px rgba(0,0,0,0.08);
      --card-shadow-dark: 0 0 0 1px rgba(255,255,255,0.05), 0 8px 32px rgba(0,0,0,0.4);
      --border-radius-card: 12px;
      --border-radius-btn: 30px;
      --transition-fast: 0.25s ease-out;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--deep-bg);
      color: var(--text-light);
      margin: 0;
      line-height: 1.7;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航栏 */
    .navbar-custom {
      background: rgba(15, 15, 18, 0.85);
      backdrop-filter: blur(12px);
      padding: 12px 0;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo-text {
      font-size: 28px;
      font-weight: 900;
      letter-spacing: -0.5px;
    }
    .logo-text .speed {
      background: linear-gradient(135deg, var(--primary), var(--accent-orange));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-style: italic;
    }
    .logo-text .esports {
      color: white;
      font-weight: 700;
      margin-left: 4px;
    }
    .nav-chips {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .nav-chip {
      background: rgba(255,255,255,0.08);
      color: var(--text-muted);
      padding: 8px 18px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 500;
      transition: background var(--transition-fast), color var(--transition-fast);
    }
    .nav-chip.active, .nav-chip:hover {
      background: var(--accent-orange);
      color: white;
    }
    .btn-race {
      background: var(--accent-orange);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      transition: all var(--transition-fast);
      box-shadow: 0 0 15px rgba(255,94,19,0.3);
    }
    .btn-race:hover {
      background: #E04A00;
      box-shadow: 0 0 25px rgba(255,94,19,0.6);
      transform: scale(1.03);
      color: white;
    }
    /* 移动端底部导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(15,15,18,0.95);
      backdrop-filter: blur(15px);
      padding: 10px 16px;
      z-index: 999;
      overflow-x: auto;
      white-space: nowrap;
      border-top: 1px solid rgba(255,255,255,0.05);
    }
    .mobile-nav .nav-chip {
      display: inline-block;
      margin-right: 8px;
    }
    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-nav {
        display: block;
      }
      .navbar-custom .btn-race {
        display: none;
      }
      .logo-text {
        font-size: 24px;
      }
    }
    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      display: flex;
      align-items: center;
      background: var(--deep-bg);
      position: relative;
      overflow: hidden;
    }
    .speed-lines {
      position: absolute;
      inset: 0;
      background: repeating-linear-gradient(45deg, rgba(123,47,247,0.08) 0px, rgba(123,47,247,0.08) 2px, transparent 2px, transparent 10px);
      animation: moveLines 8s linear infinite;
    }
    @keyframes moveLines {
      0% { background-position: 0 0; }
      100% { background-position: 100px 100px; }
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
    }
    .hero h1 {
      font-size: clamp(42px, 8vw, 72px);
      font-weight: 900;
      line-height: 1.1;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }
    .gradient-text {
      background: linear-gradient(to right, var(--primary), var(--accent-orange));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .neon-highlight {
      color: var(--neon-cyan);
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 600px;
      margin-bottom: 32px;
    }
    .btn-outline-light {
      border: 2px solid var(--cold-white);
      color: white;
      border-radius: 30px;
      padding: 12px 32px;
      background: transparent;
      transition: all var(--transition-fast);
    }
    .btn-outline-light:hover {
      background: rgba(255,255,255,0.1);
      border-color: var(--neon-cyan);
      color: white;
    }
    /* 服务板块非对称 */
    .section-padding {
      padding: 100px 0;
    }
    .section-title {
      font-size: 36px;
      margin-bottom: 48px;
      position: relative;
      padding-left: 20px;
    }
    .section-title::before {
      content: '';
      position: absolute;
      left: 0;
      top: 5px;
      height: 32px;
      width: 4px;
      background: var(--neon-cyan);
      border-radius: 4px;
    }
    .service-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .service-card.large {
      grid-row: span 2;
      background: linear-gradient(145deg, #1e1e24, #15151a);
      border-left: 4px solid var(--primary);
    }
    .service-card {
      background: var(--cold-white);
      color: var(--text-dark);
      border-radius: var(--border-radius-card);
      padding: 32px;
      transition: all var(--transition-fast);
      box-shadow: var(--card-shadow-light);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(0,0,0,0.15);
      border-left: 4px solid var(--accent-orange);
    }
    .service-card h3 {
      font-size: 24px;
      margin: 16px 0 12px;
    }
    .service-icon {
      font-size: 40px;
      color: var(--neon-cyan);
    }
    @media (max-width: 768px) {
      .service-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 数据区 */
    .stats-section {
      background: #0A0A0F;
      padding: 80px 0;
    }
    .stat-item h3 {
      font-family: 'DIN Alternate', 'Helvetica Neue', sans-serif;
      font-size: 56px;
      font-weight: 800;
      color: var(--neon-cyan);
    }
    /* 案例卡片 */
    .case-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scrollbar-width: thin;
    }
    .case-card {
      min-width: 300px;
      background: #1A1A1E;
      border-radius: var(--border-radius-card);
      border: 1px solid rgba(255,255,255,0.08);
      overflow: hidden;
      transition: var(--transition-fast);
    }
    .case-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-4px);
    }
    .case-img {
      height: 180px;
      background-size: cover;
    }
    /* 时间轴 */
    .timeline-node {
      display: flex;
      gap: 30px;
      margin-bottom: 40px;
      position: relative;
    }
    .timeline-marker {
      width: 40px;
      height: 40px;
      background: var(--accent-orange);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      z-index: 2;
    }
    .timeline-card {
      background: var(--cold-white);
      color: var(--text-dark);
      padding: 24px;
      border-radius: var(--border-radius-card);
      flex: 1;
    }
    /* FAQ */
    .accordion-button {
      background: #1E1E24;
      color: white;
      border-radius: 8px !important;
      font-weight: 600;
    }
    .accordion-button:not(.collapsed) {
      background: #2a2a32;
      color: var(--neon-cyan);
      box-shadow: none;
    }
    .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 12px;
    }
    /* CTA */
    .cta-full {
      background: #0A0A0F;
      padding: 100px 0;
      text-align: center;
    }
    .pulse-btn {
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255,94,19,0.6); }
      70% { box-shadow: 0 0 0 18px rgba(255,94,19,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,94,19,0); }
    }
    footer {
      background: #0A0A0F;
      padding: 60px 0 30px;
      color: var(--text-muted);
    }