/* roulang page: index */
:root {
      --primary-cyan: #00F0FF;
      --primary-red: #FF4655;
      --bg-deep: #0A0E17;
      --bg-card: #141B25;
      --bg-light: #F4F6F9;
      --text-white: #E8ECF1;
      --text-muted: #8A95A5;
      --success-green: #00E676;
      --border-dim: #2A3340;
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 8px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-glow: 0 16px 48px rgba(0,240,255,0.15);
      --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --transition: all 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-white);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 14, 23, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.25);
      z-index: 1000;
      padding: 0 24px;
    }

    .nav-container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-size: 1.6rem;
      font-weight: 800;
      background: linear-gradient(135deg, #00F0FF 0%, #00C8E0 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }

    .logo-icon {
      font-size: 1.8rem;
      filter: drop-shadow(0 0 6px #00F0FF);
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--primary-cyan);
      transition: width 0.25s ease, left 0.25s ease;
    }

    .nav-links a:hover {
      color: var(--primary-cyan);
    }

    .nav-links a:hover::after {
      width: 100%;
      left: 0;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }

    .hamburger span {
      width: 28px;
      height: 2px;
      background: var(--text-white);
      transition: 0.3s;
    }

    /* 移动端导航面板 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(10, 14, 23, 0.98);
      backdrop-filter: blur(30px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 40px;
      transform: translateX(100%);
      transition: transform 0.4s ease;
      z-index: 999;
    }

    .mobile-menu.active {
      transform: translateX(0);
    }

    .mobile-menu a {
      font-size: 2rem;
      font-weight: 600;
      color: var(--text-white);
      text-decoration: none;
    }

    /* Hero区域 */
    .hero {
      padding: 160px 0 100px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: radial-gradient(circle at 20% 30%, rgba(0,240,255,0.08) 0%, transparent 50%),
                  radial-gradient(circle at 80% 70%, rgba(255,70,85,0.06) 0%, transparent 50%);
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      z-index: 2;
    }

    .hero-left {
      flex: 1;
    }

    .hero-left h1 {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.5px;
      background: linear-gradient(to right, #00F0FF, #A0F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 24px;
    }

    .hero-left .subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 40px;
      max-width: 500px;
    }

    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--primary-cyan);
      color: #0A0E17;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      display: inline-block;
      transition: 0.2s;
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      background: #33F5FF;
      box-shadow: 0 0 20px rgba(0,240,255,0.5);
    }

    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--primary-cyan);
      color: var(--primary-cyan);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      transition: 0.2s;
    }

    .btn-secondary:hover {
      background: rgba(0,240,255,0.1);
    }

    .hero-right {
      flex: 1;
      display: flex;
      justify-content: center;
    }

    .dashboard-mock {
      background: rgba(20,27,37,0.7);
      backdrop-filter: blur(12px);
      border-radius: 24px;
      padding: 24px;
      border: 1px solid rgba(0,240,255,0.3);
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      width: 100%;
      max-width: 400px;
    }

    .stat-badge {
      background: #141B25;
      border-radius: 12px;
      padding: 16px;
      flex: 1 1 40%;
      text-align: center;
    }

    .live-number {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary-cyan);
      text-shadow: 0 0 8px #00F0FF;
    }

    .progress-ring {
      width: 80px;
      height: 80px;
      margin: 0 auto 10px;
    }

    /* 通用板块 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      position: relative;
    }

    .section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 3px;
      background: var(--primary-cyan);
      margin: 16px auto 0;
    }

    .pain-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 24px;
      margin-top: 48px;
    }

    .pain-card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 32px;
      transition: var(--transition);
    }

    .pain-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(0,240,255,0.2);
    }

    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
      margin-top: 48px;
    }

    .data-badge-card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 32px 20px;
      text-align: center;
      transition: 0.3s;
    }

    .data-badge-card:hover {
      border: 1px solid var(--primary-cyan);
      box-shadow: var(--shadow-glow);
    }

    .testimonial-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 20px 0;
      margin-top: 40px;
    }

    .testimonial-card {
      background: var(--bg-light);
      color: #0A0E17;
      border-radius: 20px;
      padding: 28px;
      min-width: 300px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.2);
    }

    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 40px;
      background: var(--bg-light);
      padding: 40px;
      border-radius: 28px;
    }

    .faq-item {
      background: white;
      border-radius: 12px;
      padding: 16px;
    }

    .cta-section {
      background: linear-gradient(135deg, #0A0E17 0%, #101826 100%);
      text-align: center;
    }

    .footer {
      background: #0A0E17;
      border-top: 1px solid var(--primary-cyan);
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero-grid { flex-direction: column; }
      .hero-left h1 { font-size: 2.4rem; }
      .pain-grid, .solutions-grid { grid-template-columns: 1fr; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }