/* roulang page: index */
:root {
      --bg-deep: #0A0E27;
      --bg-card: rgba(255, 255, 255, 0.03);
      --bg-section: #101433;
      --primary-cyan: #00F0FF;
      --primary-purple: #A855F7;
      --text-white: #F0F2FF;
      --text-light: #B0B8D1;
      --text-dim: #6B7288;
      --border-glow: rgba(0, 240, 255, 0.18);
      --border-hover: rgba(0, 240, 255, 0.5);
      --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.6);
      --shadow-glow: 0 0 22px rgba(0, 240, 255, 0.5);
      --radius-card: 18px;
      --radius-btn: 10px;
      --radius-sm: 12px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --transition-smooth: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1);
    }

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

    body {
      font-family: var(--font-sans);
      background: radial-gradient(circle at 30% 10%, #1B1F3A 0%, #0A0E27 80%);
      color: var(--text-white);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    /* 网格背景纹理 */
    .bg-pattern {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: 
        linear-gradient(rgba(0, 240, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.02) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
      z-index: 0;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 28px;
      position: relative;
      z-index: 2;
    }

    /* 导航 */
    .nav-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 76px;
      background: rgba(10, 14, 39, 0.8);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-glow);
      z-index: 999;
      display: flex;
      align-items: center;
      transition: var(--transition-smooth);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 28px;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: 1px;
      background: linear-gradient(135deg, var(--primary-cyan), #BEF5FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }
    .logo i {
      background: none;
      -webkit-text-fill-color: var(--primary-cyan);
      font-size: 2rem;
    }

    .nav-links {
      display: flex;
      gap: 2.2rem;
      list-style: none;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-light);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary-cyan);
      box-shadow: 0 0 10px var(--primary-cyan);
      transition: width 0.25s ease;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-cyan);
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--primary-cyan);
      font-size: 2rem;
      cursor: pointer;
    }

    /* 移动端导航面板 */
    .mobile-menu {
      position: fixed;
      top: 76px;
      left: 0;
      width: 100%;
      background: rgba(8, 12, 34, 0.96);
      backdrop-filter: blur(20px);
      display: none;
      flex-direction: column;
      padding: 28px;
      gap: 1.8rem;
      z-index: 998;
      border-bottom: 1px solid var(--border-glow);
    }
    .mobile-menu a {
      color: var(--text-white);
      font-size: 1.3rem;
      font-weight: 500;
      text-decoration: none;
      display: block;
    }
    .show-mobile-menu {
      display: flex;
    }

    /* 板块通用 */
    section {
      padding: 90px 0;
      position: relative;
      z-index: 2;
    }

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 18px;
      color: white;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 4px;
      background: linear-gradient(90deg, var(--primary-cyan), var(--primary-purple));
      border-radius: 4px;
    }
    .section-sub {
      color: var(--text-light);
      font-size: 1.15rem;
      max-width: 700px;
      margin-bottom: 48px;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    .glass-card:hover {
      border-color: var(--border-hover);
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.25);
      background: rgba(255, 255, 255, 0.06);
    }

    /* 按钮体系 */
    .btn-primary {
      background: linear-gradient(135deg, #00F0FF, #A855F7);
      border: none;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      color: #0A0E27;
      font-size: 1.1rem;
      cursor: pointer;
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
      transition: all 0.3s;
      text-decoration: none;
      display: inline-block;
      letter-spacing: 0.8px;
    }
    .btn-primary:hover {
      box-shadow: 0 0 32px rgba(168, 85, 247, 0.8);
      transform: translateY(-2px);
      color: white;
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.3s;
      text-decoration: none;
      display: inline-block;
    }
    .btn-ghost:hover {
      background: rgba(0, 240, 255, 0.08);
      box-shadow: 0 0 18px rgba(0,240,255,0.5);
    }

    /* 数据数字动画 */
    .counter {
      font-family: 'Courier New', monospace;
      font-weight: 700;
      font-size: 2.8rem;
      background: linear-gradient(to right, #00F0FF, #C084FC);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    @keyframes pulse-glow {
      0% { box-shadow: 0 0 12px rgba(0,240,255,0.3); }
      50% { box-shadow: 0 0 28px rgba(168,85,247,0.7); }
      100% { box-shadow: 0 0 12px rgba(0,240,255,0.3); }
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .nav-links { gap: 1.4rem; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .container { padding: 0 20px; }
      section { padding: 60px 0; }
      .section-title { font-size: 2rem; }
    }
    @media (max-width: 520px) {
      .btn-primary, .btn-ghost { padding: 12px 24px; font-size: 1rem; }
    }