/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    :root {
      --primary: #7C3AED;
      --primary-glow: rgba(124, 58, 237, 0.7);
      --accent: #06D6A0;
      --accent-glow: rgba(6, 214, 160, 0.5);
      --dark-bg: #0F0B1A;
      --card-bg: #1A1525;
      --card-bg-hover: #241E35;
      --text-primary: #FFFFFF;
      --text-secondary: #B0A8C0;
      --text-muted: #7A7288;
      --border-light: rgba(124, 58, 237, 0.25);
      --border-accent: rgba(6, 214, 160, 0.4);
      --shadow-card: 0 4px 24px rgba(124, 58, 237, 0.15);
      --shadow-card-hover: 0 8px 32px rgba(124, 58, 237, 0.3);
      --radius-lg: 16px;
      --radius-md: 10px;
      --radius-pill: 20px;
      --radius-sm: 8px;
      --font-mono: 'Courier New', 'Roboto Mono', monospace;
      --transition: all 0.25s ease;
    }
    
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', '思源黑体', system-ui, -apple-system, sans-serif;
      background-color: var(--dark-bg);
      color: var(--text-primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(15, 11, 26, 0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(124, 58, 237, 0.35);
      z-index: 1000;
      display: flex;
      align-items: center;
      transition: var(--transition);
    }
    .nav .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1.7rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: white;
      text-decoration: none;
    }
    .logo i {
      color: var(--accent);
      font-size: 2rem;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 8px 0;
      transition: var(--transition);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width 0.2s ease;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }
    
    /* 首屏 Hero */
    .hero {
      padding: 140px 0 80px;
      background: radial-gradient(circle at 30% 20%, rgba(124, 58, 237, 0.25) 0%, var(--dark-bg) 70%);
      min-height: 90vh;
      display: flex;
      align-items: center;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-text h1 {
      font-size: 3.4rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
      background: linear-gradient(to right, #fff, #e0d7ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--accent);
      margin-bottom: 28px;
      font-weight: 500;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
      flex-wrap: wrap;
      margin-bottom: 32px;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border: none;
      color: white;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-md);
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      display: inline-block;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
    }
    .btn-primary:hover {
      filter: brightness(1.2);
      box-shadow: 0 0 20px var(--accent-glow);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--accent);
      color: var(--accent);
      font-weight: 600;
      padding: 14px 28px;
      border-radius: var(--radius-md);
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(6, 214, 160, 0.08);
      box-shadow: 0 0 16px rgba(6, 214, 160, 0.3);
    }
    .badge-row {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }
    .badge {
      background: rgba(26, 21, 37, 0.8);
      border: 1px solid var(--accent);
      color: var(--accent);
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 0.9rem;
      font-weight: 600;
      font-family: var(--font-mono);
      backdrop-filter: blur(4px);
    }
    .hero-image {
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .hero-image img {
      max-width: 100%;
      height: auto;
      border-radius: var(--radius-lg);
      box-shadow: 0 0 40px rgba(124, 58, 237, 0.4);
      transition: var(--transition);
    }
    
    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
    }
    .section-sub {
      color: var(--text-secondary);
      text-align: center;
      max-width: 600px;
      margin: 0 auto 48px;
    }
    
    /* 亮点数据 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      text-align: center;
      border-top: 4px solid var(--primary);
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }
    .stat-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
      background: #241E35;
    }
    .stat-number {
      font-size: 3.2rem;
      font-weight: 700;
      font-family: var(--font-mono);
      color: var(--accent);
      margin-bottom: 8px;
    }
    .stat-label {
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    
    /* 服务双列卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 28px;
      display: flex;
      gap: 20px;
      align-items: flex-start;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .service-card:hover {
      border-color: var(--accent);
      box-shadow: 0 0 20px rgba(6, 214, 160, 0.2);
    }
    .service-icon {
      background: linear-gradient(135deg, var(--primary), #5b21b6);
      width: 56px;
      height: 56px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      color: white;
      flex-shrink: 0;
    }
    .service-content h3 {
      font-size: 1.4rem;
      margin-bottom: 8px;
    }
    .service-content p {
      color: var(--text-secondary);
      margin-bottom: 12px;
    }
    .text-link {
      color: var(--accent);
      text-decoration: none;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    
    /* 案例瀑布流 */
    .cases-masonry {
      columns: 3;
      column-gap: 24px;
    }
    .case-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      margin-bottom: 24px;
      break-inside: avoid;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .case-card img {
      width: 100%;
      display: block;
      border-top-left-radius: var(--radius-lg);
      border-top-right-radius: var(--radius-lg);
    }
    .case-info {
      padding: 20px;
    }
    .case-info h3 {
      font-size: 1.3rem;
      margin-bottom: 8px;
    }
    .tag {
      background: rgba(6, 214, 160, 0.15);
      color: var(--accent);
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-block;
      margin-top: 8px;
    }
    
    /* 对比表 */
    .compare-wrapper {
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 700px;
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }
    .compare-table th {
      background: linear-gradient(135deg, var(--primary), #4c1d95);
      color: white;
      padding: 16px;
      font-weight: 600;
    }
    .compare-table td, .compare-table th {
      padding: 16px;
      text-align: center;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .highlight-col {
      border: 2px solid var(--accent);
      background: rgba(6, 214, 160, 0.05);
    }
    .badge-hot {
      background: var(--accent);
      color: #000;
      font-size: 0.7rem;
      padding: 2px 10px;
      border-radius: 12px;
      margin-left: 6px;
    }
    
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--card-bg);
      border-left: 4px solid var(--accent);
      margin-bottom: 12px;
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      transition: var(--transition);
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      padding: 0 24px 18px;
      color: var(--text-secondary);
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active {
      border-left-color: var(--primary);
    }
    
    /* 联系 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: rgba(124, 58, 237, 0.08);
      border-radius: var(--radius-lg);
      padding: 48px;
    }
    .contact-form input, .contact-form textarea {
      width: 100%;
      background: var(--card-bg);
      border: 1px solid var(--accent);
      border-radius: var(--radius-sm);
      padding: 14px;
      margin-bottom: 16px;
      color: white;
      outline: none;
    }
    .contact-form input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 10px var(--primary-glow);
    }
    
    /* 页脚 */
    .footer {
      background: #0a0714;
      border-top: 1px solid var(--primary);
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .footer a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
    }
    .footer a:hover {
      color: var(--accent);
    }
    
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .highlights-grid { grid-template-columns: repeat(2,1fr); }
      .cases-masonry { columns: 2; }
      .footer-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .hero-text h1 { font-size: 2.5rem; }
      .highlights-grid, .services-grid { grid-template-columns: 1fr; }
      .cases-masonry { columns: 1; }
      .contact-grid { grid-template-columns: 1fr; }
    }