/* roulang page: index */
:root {
      --bg-deep: #0A0E27;
      --electric-blue: #00D4FF;
      --sport-orange: #FF6B35;
      --glass-white: rgba(255,255,255,0.05);
      --glass-border: rgba(255,255,255,0.15);
      --glass-hover: rgba(255,255,255,0.1);
      --text-primary: #FFFFFF;
      --text-secondary: #B0C4DE;
      --shadow-blue: 0 8px 32px rgba(0,212,255,0.1);
      --shadow-blue-hover: 0 12px 40px rgba(0,212,255,0.25);
      --radius-card: 16px;
      --radius-btn: 30px;
      --radius-input: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-mono: "DIN Alternate", "Courier New", monospace;
      --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-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    /* 粒子背景Canvas */
    #particle-canvas {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      z-index: -1;
      pointer-events: none;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-blue);
      transition: var(--transition-smooth);
      color: var(--text-primary);
    }
    .glass-card:hover {
      background: rgba(255,255,255,0.1);
      border-color: rgba(0,212,255,0.5);
      box-shadow: var(--shadow-blue-hover);
      transform: translateY(-8px);
    }

    /* 导航栏 */
    .main-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      height: 80px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 40px;
      background: rgba(10,14,39,0.4);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      transition: background 0.25s ease;
    }
    .main-nav.scrolled {
      background: rgba(10,14,39,0.92);
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: radial-gradient(circle at 30% 30%, #00D4FF, #0A0E27);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      color: white;
      box-shadow: 0 0 18px rgba(0,212,255,0.5);
    }
    .logo-text {
      font-size: 24px;
      font-weight: 700;
      letter-spacing: 2px;
      color: white;
    }
    .nav-links {
      display: flex;
      gap: 40px;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 16px;
      position: relative;
      transition: color 0.3s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      width: 0;
      height: 2px;
      bottom: -6px;
      left: 0;
      background: var(--electric-blue);
      transition: width 0.3s ease;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--electric-blue);
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .mobile-nav {
      display: none;
    }

    /* 按钮系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition-smooth);
      cursor: pointer;
      border: none;
      font-size: 16px;
    }
    .btn-primary {
      background: var(--electric-blue);
      color: white;
      box-shadow: 0 0 20px rgba(0,212,255,0.6);
    }
    .btn-primary:hover {
      box-shadow: 0 0 30px rgba(0,212,255,0.9);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--electric-blue);
      color: var(--electric-blue);
    }
    .btn-outline:hover {
      background: rgba(0,212,255,0.1);
      color: white;
    }
    .btn-cta {
      background: var(--sport-orange);
      color: white;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(1); box-shadow: 0 0 0 rgba(255,107,53,0.7); }
      50% { transform: scale(1.03); box-shadow: 0 0 25px rgba(255,107,53,0.9); }
      100% { transform: scale(1); box-shadow: 0 0 0 rgba(255,107,53,0.7); }
    }

    /* Hero 区块 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding: 100px 0 60px;
      position: relative;
    }
    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 50px;
      flex-wrap: wrap;
    }
    .hero-left {
      flex: 1 1 500px;
    }
    .hero-left h1 {
      font-size: 56px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      text-shadow: 0 0 30px rgba(0,212,255,0.3);
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 20px;
      color: var(--text-secondary);
      margin-bottom: 36px;
      max-width: 580px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .hero-right {
      flex: 1 1 380px;
      display: flex;
      justify-content: center;
    }
    .data-preview-card {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(24px);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: 28px;
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      gap: 22px;
      width: 100%;
      max-width: 360px;
    }
    .stat-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--text-primary);
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 42px;
      font-weight: 700;
      color: var(--sport-orange);
    }
    .trend-up {
      color: #00ff88;
      font-size: 18px;
    }

    /* 通用标题 */
    .section-title {
      font-size: 42px;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 3px;
      background: linear-gradient(90deg, var(--electric-blue), transparent);
    }

    /* 数据看板 */
    #dashboard {
      padding: 100px 0;
    }
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
      margin-top: 40px;
    }
    .metric-card {
      padding: 32px;
      text-align: center;
    }
    .metric-icon {
      font-size: 40px;
      margin-bottom: 12px;
    }
    .metric-value {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      color: var(--electric-blue);
    }

    /* 服务矩阵 非对称 */
    #services {
      padding: 100px 0;
    }
    .services-grid {
      display: grid;
      grid-template-columns: 1.3fr 0.7fr;
      gap: 24px;
      margin-top: 40px;
    }
    .service-card {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .service-icon {
      font-size: 52px;
      filter: drop-shadow(0 0 12px var(--electric-blue));
    }

    /* 效果对比 */
    #compare {
      padding: 100px 0;
    }
    .compare-wrapper {
      display: flex;
      margin-top: 40px;
      border-radius: 28px;
      overflow: hidden;
      position: relative;
    }
    .compare-left, .compare-right {
      flex: 1;
      padding: 40px;
      background-size: cover;
      background-position: center;
      position: relative;
      min-height: 400px;
    }
    .compare-divider {
      width: 3px;
      background: linear-gradient(180deg, var(--electric-blue), transparent);
      box-shadow: 0 0 20px var(--electric-blue);
    }

    /* FAQ */
    .faq-item {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-card);
      padding: 20px 28px;
      margin-bottom: 16px;
      transition: 0.3s;
    }

    /* 转化表单 */
    #contact {
      padding: 100px 0;
      background: radial-gradient(circle at 30% 30%, #112244, #0A0E27);
    }
    .form-card {
      max-width: 600px;
      margin: 0 auto;
      padding: 40px;
    }

    footer {
      background: #060B1A;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.5fr 1fr;
      gap: 30px;
    }
    @media (max-width: 1024px) {
      .dashboard-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .main-nav { display: none; }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 68px;
        background: rgba(10,14,39,0.92);
        backdrop-filter: blur(20px);
        justify-content: space-around;
        align-items: center;
        z-index: 1000;
        border-top: 1px solid rgba(255,255,255,0.1);
      }
      .hero-left h1 { font-size: 36px; }
      .services-grid { grid-template-columns: 1fr; }
      .compare-wrapper { flex-direction: column; }
      .dashboard-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }