/* roulang page: index */
:root {
      --deep-blue: #0A0F24;
      --bg-gradient-end: #141B33;
      --electric-blue: #00D4FF;
      --champagne-gold: #C9A96E;
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.08);
      --glass-border-hover: rgba(0, 212, 255, 0.5);
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.7);
      --text-muted: rgba(255, 255, 255, 0.5);
      --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      --card-hover-shadow: 0 12px 40px rgba(0, 212, 255, 0.15);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-title: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --font-body: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --spacing-section: 100px;
    }

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

    body {
      font-family: var(--font-body);
      background: linear-gradient(160deg, var(--deep-blue) 0%, var(--bg-gradient-end) 100%);
      color: var(--text-primary);
      line-height: 1.7;
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease, border-color 0.2s ease;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-title);
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin-bottom: 0.5rem;
    }

    h1 {
      font-size: 3.5rem;
      margin-bottom: 1rem;
    }
    h2 {
      font-size: 2.5rem;
      margin-bottom: 1.5rem;
      color: var(--text-primary);
      position: relative;
      display: inline-block;
    }
    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 4px;
      background: var(--electric-blue);
      border-radius: 2px;
    }
    h3 {
      font-size: 1.5rem;
      margin-bottom: 0.75rem;
      color: var(--text-primary);
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--card-shadow);
      transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
    }
    .glass-card:hover {
      border-color: var(--glass-border-hover);
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-2px);
    }

    /* 按钮 */
    .btn-primary {
      background: var(--electric-blue);
      color: var(--deep-blue);
      font-weight: 600;
      padding: 0.8rem 2.2rem;
      border-radius: 50px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      border: none;
      transition: all 0.3s ease;
      letter-spacing: 0.02em;
      box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
      cursor: pointer;
      font-size: 1rem;
    }
    .btn-primary:hover {
      box-shadow: 0 0 25px rgba(0, 212, 255, 0.7);
      transform: scale(1.02);
      color: var(--deep-blue);
      background: #33ddff;
    }

    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #fff;
      font-weight: 500;
      padding: 0.8rem 2.2rem;
      border-radius: 50px;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: all 0.3s ease;
      cursor: pointer;
      backdrop-filter: blur(5px);
    }
    .btn-outline:hover {
      border-color: var(--champagne-gold);
      color: var(--champagne-gold);
      background: rgba(201, 169, 110, 0.08);
    }

    /* 导航栏 */
    .custom-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(10, 15, 36, 0.85);
      backdrop-filter: blur(15px);
      -webkit-backdrop-filter: blur(15px);
      border-bottom: 1px solid transparent;
      background-image: linear-gradient(rgba(10,15,36,0.85), rgba(10,15,36,0.85)), linear-gradient(90deg, var(--electric-blue), transparent);
      background-origin: border-box;
      background-clip: padding-box, border-box;
      padding: 0.8rem 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1300px;
      margin: 0 auto;
      padding: 0 2rem;
    }
    .nav-left, .nav-right {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .nav-logo {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 1.8rem;
      color: #fff;
      letter-spacing: 0.5px;
      background: linear-gradient(135deg, #fff 0%, #c9a96e 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-link {
      color: rgba(255,255,255,0.8);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      position: relative;
    }
    .nav-link:hover {
      color: var(--electric-blue);
    }
    .mobile-menu-icon {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .mobile-menu-icon span {
      width: 26px;
      height: 2px;
      background: var(--electric-blue);
      border-radius: 2px;
      transition: 0.3s;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(0deg, rgba(10,15,36,0.7) 0%, rgba(10,15,36,0.4) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      margin-top: 0;
    }
    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 3rem;
      flex-wrap: wrap;
    }
    .hero-left {
      flex: 1 1 500px;
    }
    .hero-right {
      flex: 0 0 320px;
    }
    .hero-badge {
      display: inline-block;
      background: rgba(0,212,255,0.15);
      border: 1px solid rgba(0,212,255,0.4);
      color: var(--electric-blue);
      padding: 0.3rem 1.2rem;
      border-radius: 30px;
      font-size: 0.9rem;
      margin-bottom: 1.5rem;
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 2rem;
    }
    .stat-card {
      padding: 2rem 1.5rem;
      text-align: center;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--electric-blue);
      font-family: var(--font-title);
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 2.5rem;
    }
    .service-card img {
      border-radius: 12px;
      height: 180px;
      object-fit: cover;
      width: 100%;
      margin-bottom: 1.2rem;
    }

    /* 对比条 */
    .comparison-row {
      display: flex;
      gap: 2rem;
      margin-top: 2rem;
      flex-wrap: wrap;
    }
    .bar-group {
      flex: 1;
    }
    .bar {
      height: 12px;
      background: rgba(255,255,255,0.1);
      border-radius: 10px;
      margin: 1rem 0;
      overflow: hidden;
    }
    .bar-fill {
      height: 100%;
      width: 0%;
      background: var(--electric-blue);
      border-radius: 10px;
      transition: width 1.2s ease;
    }
    .bar-fill.gold {
      background: var(--champagne-gold);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 1.2rem 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      align-items: center;
      gap: 1rem;
      font-weight: 600;
      font-size: 1.15rem;
    }
    .faq-question i {
      color: var(--electric-blue);
      font-size: 1.4rem;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
      padding-left: 2.8rem;
    }

    /* 表单 */
    .cta-form input, .cta-form textarea {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: 40px;
      padding: 0.9rem 1.5rem;
      color: white;
      margin-bottom: 1rem;
      width: 100%;
      transition: 0.2s;
    }
    .cta-form input:focus, .cta-form textarea:focus {
      outline: none;
      border-color: var(--electric-blue);
      box-shadow: 0 0 10px rgba(0,212,255,0.3);
    }

    .footer-bottom {
      border-top: 1px solid rgba(0,212,255,0.3);
      padding-top: 2rem;
      margin-top: 2rem;
      text-align: center;
      color: var(--text-muted);
    }

    @media (max-width: 1024px) {
      h1 { font-size: 2.8rem; }
    }
    @media (max-width: 768px) {
      .nav-left, .nav-right { display: none; }
      .mobile-menu-icon { display: flex; }
      .nav-container { justify-content: space-between; }
      .dashboard-grid, .services-grid { grid-template-columns: 1fr; }
      .hero-content { flex-direction: column; }
      .hero-right { width: 100%; }
      h1 { font-size: 2.2rem; }
      h2 { font-size: 2rem; }
      .stat-number { font-size: 2rem; }
      .comparison-row { flex-direction: column; }
    }