/* roulang page: index */
:root {
      --bg-deep: #0A1128;
      --bg-card: #0D1B3E;
      --accent-cyan: #00F0FF;
      --accent-gold: #D4AF37;
      --text-high: #E0E6F0;
      --text-mid: #8892B0;
      --text-border: #4A5578;
      --glass-bg: rgba(13, 27, 62, 0.6);
      --glass-border: rgba(0, 240, 255, 0.15);
      --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.05);
      --radius-card: 16px;
      --radius-btn: 30px;
      --radius-input: 8px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --transition-smooth: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      margin: 0;
      background-color: var(--bg-deep);
      color: var(--text-mid);
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      font-weight: 400;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      font-weight: 700;
      color: var(--text-high);
      margin-bottom: 0.75rem;
    }
    
    h1 { font-size: 48px; line-height: 1.2; }
    h2 { font-size: 36px; line-height: 1.3; }
    h3 { font-size: 24px; line-height: 1.35; }
    p { margin-bottom: 1rem; color: var(--text-mid); }
    
    a {
      color: var(--accent-cyan);
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    a:hover {
      color: var(--accent-cyan);
      text-shadow: 0 0 8px rgba(0,240,255,0.5);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: 12px;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    
    /* 导航栏毛玻璃 */
    .nav-glass {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(10, 17, 40, 0.78);
      backdrop-filter: blur(30px);
      -webkit-backdrop-filter: blur(30px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.1);
      padding: 0.7rem 0;
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .logo-icon {
      font-size: 1.8rem;
      color: var(--accent-gold);
      filter: drop-shadow(0 0 6px rgba(212,175,55,0.6));
    }
    .logo-text {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: 1px;
      background: linear-gradient(to right, #E0E6F0, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
      flex-wrap: wrap;
    }
    .nav-links a {
      color: var(--text-mid);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 0.3rem 0;
      position: relative;
    }
    .nav-links a:hover {
      color: var(--accent-cyan);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.2s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    
    .search-icon {
      color: var(--text-mid);
      font-size: 1.2rem;
      margin-right: 0.5rem;
      cursor: default;
    }
    
    .btn-ghost {
      background: transparent;
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
      padding: 0.5rem 1.5rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-smooth);
      cursor: pointer;
      background: rgba(0,240,255,0.05);
    }
    .btn-ghost:hover {
      background: rgba(0,240,255,0.2);
      box-shadow: 0 0 14px rgba(0,240,255,0.4);
    }
    
    .btn-primary {
      background: linear-gradient(135deg, #00F0FF, #0088CC);
      border: none;
      color: #0A1128;
      font-weight: 700;
      padding: 0.6rem 2rem;
      border-radius: var(--radius-btn);
      box-shadow: 0 4px 15px rgba(0,240,255,0.35);
      transition: var(--transition-smooth);
      letter-spacing: 0.5px;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      box-shadow: 0 0 24px rgba(0,240,255,0.7);
      transform: translateY(-2px);
      color: #0A1128;
    }
    
    /* 汉堡菜单 (移动端) */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--accent-cyan);
      font-size: 1.8rem;
      cursor: pointer;
    }
    
    /* Hero */
    #hero {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, #0D2B5A, #0A1128);
      overflow: hidden;
    }
    .hero-bg {
      position: absolute;
      top:0;left:0;width:100%;height:100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      width: 100%;
    }
    .glass-card-hero {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      box-shadow: var(--glass-shadow);
      border-radius: 24px;
      padding: 2.5rem;
      max-width: 700px;
      margin: 0 auto;
      text-align: center;
    }
    .dynamic-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent-cyan);
      text-shadow: 0 0 12px #00F0FF;
    }
    
    /* 数据看板 */
    .stat-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      text-align: center;
      transition: all 0.3s ease;
    }
    .stat-card:hover {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 28px rgba(0,240,255,0.3);
      transform: translateY(-5px);
    }
    .stat-icon {
      font-size: 2.2rem;
      color: var(--accent-cyan);
      margin-bottom: 0.8rem;
    }
    
    /* 服务矩阵 1+2 布局 */
    .service-large {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 2rem;
      height: 100%;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      overflow: hidden;
      min-height: 360px;
    }
    .service-large::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(10,17,40,0.7);
      backdrop-filter: blur(4px);
      border-radius: var(--radius-card);
    }
    .service-large .service-text {
      position: relative;
      z-index: 2;
    }
    .service-small {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 1.8rem;
      display: flex;
      gap: 1rem;
      align-items: center;
      margin-bottom: 1.2rem;
    }
    .service-small img {
      width: 80px;
      height: 80px;
      object-fit: cover;
      border-radius: 12px;
    }
    
    /* 对比 */
    .compare-badge {
      background: linear-gradient(135deg, #00F0FF, #0A1128);
      border-radius: 50%;
      width: 60px;
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: white;
      box-shadow: 0 0 20px #00F0FF;
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      z-index: 5;
    }
    
    /* FAQ */
    .accordion-item {
      background: rgba(13,27,62,0.5);
      backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: 12px;
      margin-bottom: 1rem;
    }
    .accordion-title {
      background: transparent;
      color: var(--text-high);
      font-weight: 600;
      padding: 1.2rem;
      border: none;
      width: 100%;
      text-align: left;
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }
    .accordion-content {
      background: rgba(0,240,255,0.03);
      padding: 1rem 1.5rem;
      color: var(--text-mid);
    }
    
    /* 表单 */
    .contact-form-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 24px;
      padding: 2.5rem;
    }
    input, select, textarea {
      background: rgba(255,255,255,0.05);
      border: 1px solid var(--text-border);
      border-radius: var(--radius-input);
      color: var(--text-high);
      padding: 0.75rem;
      width: 100%;
    }
    input:focus, select:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 10px rgba(0,240,255,0.4);
      outline: none;
    }
    
    footer {
      background: #060B1A;
      color: var(--text-mid);
    }
    
    @media (max-width: 1024px) {
      h1 { font-size: 38px; }
      .nav-links { gap: 1.2rem; }
    }
    
    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: rgba(10,17,40,0.95);
        backdrop-filter: blur(25px);
        padding: 1.5rem;
        margin-top: 1rem;
        border-radius: 16px;
      }
      .nav-links.active { display: flex; }
      .compare-badge { position: static; transform: none; margin: 1rem auto; width: 50px; height: 50px; }
    }
    
    @media (max-width: 640px) {
      h1 { font-size: 32px; }
      h2 { font-size: 28px; }
      .glass-card-hero { padding: 1.8rem; }
    }