/* roulang page: index */
:root {
      --deep-space: #0B1A2F;
      --midnight-blue: #1A3A5C;
      --racing-orange: #F4A261;
      --hover-orange: #E07B3C;
      --clean-bg: #F8F9FA;
      --card-white: #FFFFFF;
      --soft-text: rgba(255,255,255,0.7);
      --dark-text: #1e293b;
      --muted-text: #64748b;
      --border-light: rgba(255,255,255,0.15);
      --shadow-card: 0 8px 32px rgba(11,26,47,0.08);
      --shadow-hover: 0 12px 40px rgba(11,26,47,0.14);
      --radius-lg: 16px;
      --radius-pill: 40px;
      --transition-smooth: 0.3s cubic-bezier(0.25,0.8,0.25,1.2);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--clean-bg);
      color: var(--dark-text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      width: 100%;
      height: 72px;
      background: rgba(11,26,47,0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
      z-index: 1000;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 24px;
      font-weight: 700;
      color: #FFFFFF;
      text-decoration: none;
      letter-spacing: -0.3px;
    }
    .logo-dot {
      width: 10px;
      height: 10px;
      background: var(--racing-orange);
      border-radius: 50%;
      display: inline-block;
    }
    .nav-links {
      display: flex;
      gap: 32px;
    }
    .nav-links a {
      color: var(--soft-text);
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--racing-orange);
    }
    .mobile-nav {
      display: none;
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #0B1A2F 0%, #1A3A5C 100%);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      padding: 100px 24px 60px;
    }
    .stars {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 20% 30%, rgba(244,162,97,0.12) 0%, transparent 30%),
                  radial-gradient(circle at 80% 70%, rgba(255,255,255,0.08) 0%, transparent 40%);
      animation: pulseGlow 4s infinite alternate;
    }
    @keyframes pulseGlow {
      0% { opacity: 0.6; }
      100% { opacity: 1; }
    }
    .hero-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      width: 100%;
      position: relative;
      z-index: 2;
      gap: 40px;
    }
    .hero-left {
      flex: 1 1 500px;
      color: white;
    }
    .hero-left h1 {
      font-size: 52px;
      font-weight: 700;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
      line-height: 1.2;
    }
    .hero-left .subtitle {
      font-size: 20px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
    }
    .hero-right {
      flex: 1 1 380px;
      background: rgba(255,255,255,0.07);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: 24px;
      padding: 32px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .login-icons {
      display: flex;
      justify-content: center;
      gap: 24px;
    }
    .login-icon-btn {
      background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,255,255,0.25);
      border-radius: 20px;
      padding: 16px 20px;
      color: white;
      font-weight: 600;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      transition: all 0.25s;
      cursor: pointer;
    }
    .login-icon-btn:hover {
      background: var(--racing-orange);
      border-color: var(--racing-orange);
      color: #0B1A2F;
    }
    .pulse-data {
      text-align: center;
      font-size: 28px;
      font-weight: 700;
      color: var(--racing-orange);
      font-family: "Inter", "SF Mono", monospace;
    }
    /* 数据看板 */
    .dashboard {
      padding: 70px 0;
      background: #ffffff;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      text-align: center;
    }
    .stat-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      font-family: "Inter", "SF Mono", monospace;
      color: var(--deep-space);
      margin: 12px 0;
    }
    .wave-decoration {
      height: 4px;
      background: linear-gradient(90deg, var(--racing-orange), #ffb37b);
      width: 60%;
      margin: 12px auto 0;
      border-radius: 4px;
    }
    /* 服务矩阵 */
    .services {
      padding: 80px 0;
      background: var(--clean-bg);
    }
    .section-title {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 48px;
      text-align: center;
      color: var(--deep-space);
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      display: flex;
      gap: 20px;
      align-items: flex-start;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      border: 1px solid #f0f2f5;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--racing-orange);
    }
    .service-icon {
      width: 56px;
      height: 56px;
      background: #eef2f6;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
    }
    /* 安全对比 */
    .compare {
      padding: 80px 0;
      background: #ffffff;
    }
    .compare-wrapper {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 24px;
      flex-wrap: wrap;
    }
    .compare-card {
      flex: 1 1 300px;
      background: #f1f5f9;
      border-radius: 24px;
      padding: 32px;
      text-align: center;
    }
    .compare-card.highlight {
      background: white;
      border: 2px solid var(--racing-orange);
      box-shadow: 0 10px 25px rgba(244,162,97,0.25);
    }
    .vs-badge {
      background: var(--deep-space);
      color: white;
      width: 60px;
      height: 60px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    /* FAQ */
    .faq {
      padding: 80px 0;
      background: var(--clean-bg);
    }
    .accordion {
      max-width: 800px;
      margin: 0 auto;
    }
    .accordion-item {
      background: white;
      border-radius: 12px;
      margin-bottom: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
    }
    .accordion-question {
      padding: 20px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .accordion-answer {
      padding: 0 24px 20px;
      color: #475569;
      display: none;
    }
    .accordion-item.active .accordion-answer {
      display: block;
    }
    /* CTA */
    .cta-section {
      padding: 80px 0;
    }
    .cta-card {
      background: white;
      border-radius: 32px;
      padding: 48px;
      box-shadow: 0 20px 50px rgba(11,26,47,0.15);
      text-align: center;
      max-width: 700px;
      margin: 0 auto;
    }
    .cta-input {
      display: flex;
      gap: 12px;
      margin-top: 24px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .cta-input input {
      padding: 14px 20px;
      border-radius: 40px;
      border: 1px solid #cbd5e1;
      flex: 2;
      min-width: 220px;
      transition: 0.2s;
    }
    .cta-input input:focus {
      border-color: var(--racing-orange);
      outline: none;
    }
    .btn-primary {
      background: var(--racing-orange);
      color: #0B1A2F;
      font-weight: 700;
      border: none;
      padding: 14px 32px;
      border-radius: 40px;
      cursor: pointer;
      transition: 0.2s;
      box-shadow: 0 4px 12px rgba(244,162,97,0.4);
    }
    .btn-primary:hover {
      background: var(--hover-orange);
    }
    footer {
      background: var(--deep-space);
      color: rgba(255,255,255,0.7);
      padding: 48px 0 24px;
      border-top: 2px solid var(--racing-orange);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    @media (max-width: 768px) {
      .navbar {
        padding: 0 16px;
      }
      .nav-links {
        display: none;
      }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: white;
        justify-content: space-around;
        padding: 12px;
        border-top: 1px solid #e2e8f0;
      }
      .mobile-nav a {
        font-size: 12px;
        color: #334155;
      }
      .stats-grid, .service-grid {
        grid-template-columns: 1fr;
      }
      .hero-left h1 {
        font-size: 38px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }