/* roulang page: index */
/* ----- 设计变量与全局重置 ----- */
    :root {
      --primary-deep: #1B1A3B;
      --primary-purple: #6C3FCF;
      --accent-cyan: #00E5FF;
      --accent-orange: #FF6B35;
      --accent-orange-light: #FF8C5A;
      --bg-deep-space: #0D0B1E;
      --bg-light-purple: #F3F0FF;
      --text-white: #FFFFFF;
      --text-light: #E0DDF5;
      --text-dark: #4A4A6A;
      --card-glow: rgba(108, 63, 207, 0.25);
      --card-shadow-light: 0 4px 20px rgba(0,0,0,0.06);
      --border-glass: rgba(255,255,255,0.08);
      --radius-xl: 20px;
      --radius-md: 12px;
      --radius-pill: 30px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --transition-base: 0.25s ease;
      --container-max: 1200px;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: var(--font-heading);
      background-color: var(--bg-deep-space);
      color: var(--text-light);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    button, .button {
      cursor: pointer;
      border: none;
      background: none;
      font-family: inherit;
    }
    
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 自定义覆盖 Foundation 默认风格 */
    .row {
      max-width: var(--container-max);
    }
    
    /* ----- 导航系统（双层频道Tabs） ----- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(13, 11, 30, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-glass);
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }
    
    .nav-top-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 0;
      flex-wrap: wrap;
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-white);
      letter-spacing: 1px;
    }
    
    .logo-icon {
      font-size: 2rem;
      color: var(--accent-cyan);
      filter: drop-shadow(0 0 8px rgba(0,229,255,0.5));
    }
    
    .logo-text {
      background: linear-gradient(135deg, #fff, #e0ddf5);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 18px;
    }
    
    .search-icon {
      font-size: 1.3rem;
      color: var(--text-light);
      transition: var(--transition-base);
      cursor: pointer;
    }
    
    .search-icon:hover {
      color: var(--accent-cyan);
    }
    
    .btn-nav-cta {
      background: linear-gradient(135deg, var(--accent-orange), var(--accent-orange-light));
      color: white;
      padding: 10px 22px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 0.95rem;
      box-shadow: 0 6px 16px rgba(255,107,53,0.35);
      transition: var(--transition-base);
      display: inline-block;
      white-space: nowrap;
    }
    
    .btn-nav-cta:hover {
      transform: scale(1.03);
      box-shadow: 0 8px 22px rgba(255,107,53,0.5);
      color: white;
    }
    
    /* 第二行频道Pills */
    .channel-tabs {
      padding: 0 0 10px 0;
      overflow-x: auto;
      white-space: nowrap;
      display: flex;
      gap: 10px;
      -ms-overflow-style: none;
      scrollbar-width: none;
      mask-image: linear-gradient(to right, black 85%, transparent 100%);
      -webkit-mask-image: linear-gradient(to right, black 85%, transparent 100%);
    }
    
    .channel-tabs::-webkit-scrollbar {
      display: none;
    }
    
    .pill {
      display: inline-block;
      padding: 8px 20px;
      background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: 30px;
      color: var(--text-light);
      font-size: 0.9rem;
      font-weight: 500;
      transition: var(--transition-base);
      cursor: pointer;
    }
    
    .pill:hover {
      background: var(--accent-cyan);
      color: #0D0B1E;
      border-color: var(--accent-cyan);
      font-weight: 600;
    }
    
    .pill.active {
      background: var(--accent-orange);
      border-color: var(--accent-orange);
      color: white;
      font-weight: 600;
      box-shadow: 0 0 14px rgba(255,107,53,0.6);
    }
    
    /* ----- Hero 首屏 ----- */
    .hero-section {
      position: relative;
      background: radial-gradient(circle at 30% 40%, #1B1A3B 0%, #0D0B1E 80%);
      min-height: 90vh;
      display: flex;
      align-items: center;
      overflow: hidden;
      padding: 60px 0;
    }
    
    .hero-bg-image {
      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;
    }
    
    .particle-overlay {
      position: absolute;
      width: 100%;
      height: 100%;
      z-index: 1;
      background: radial-gradient(circle at 20% 30%, rgba(108,63,207,0.2) 0%, transparent 50%);
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
    }
    
    .hero-left {
      flex: 1 1 500px;
    }
    
    .hero-left h1 {
      font-size: clamp(2.4rem, 5vw, 3.5rem);
      font-weight: 800;
      color: var(--text-white);
      line-height: 1.2;
      margin-bottom: 20px;
      text-shadow: 0 0 20px rgba(108,63,207,0.4);
    }
    
    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-light);
      margin-bottom: 32px;
      max-width: 550px;
    }
    
    .hero-cta-group {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    
    .btn-primary {
      background: linear-gradient(135deg, var(--accent-orange), #FF8C5A);
      color: white;
      padding: 14px 34px;
      border-radius: var(--radius-pill);
      font-weight: 700;
      font-size: 1.1rem;
      box-shadow: 0 8px 24px rgba(255,107,53,0.45);
      transition: var(--transition-base);
      display: inline-block;
    }
    
    .btn-primary:hover {
      transform: scale(1.04);
      box-shadow: 0 12px 28px rgba(255,107,53,0.6);
      color: white;
    }
    
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      padding: 14px 34px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 1.1rem;
      transition: var(--transition-base);
    }
    
    .btn-secondary:hover {
      background: rgba(0,229,255,0.12);
      border-color: #fff;
      color: #fff;
    }
    
    .hero-stats {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
    }
    
    .stat-badge {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-glass);
      border-radius: 16px;
      padding: 12px 20px;
      text-align: center;
    }
    
    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent-cyan);
      line-height: 1.2;
    }
    
    .stat-label {
      font-size: 0.85rem;
      color: var(--text-light);
    }
    
    /* 板块通用 */
    .section {
      padding: 90px 0;
    }
    
    .section-light {
      background-color: var(--bg-light-purple);
      color: var(--text-dark);
    }
    
    .section-dark {
      background-color: var(--bg-deep-space);
    }
    
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: inherit;
    }
    
    .section-desc {
      font-size: 1.1rem;
      max-width: 700px;
      margin: 0 auto 50px;
      color: var(--text-light);
    }
    
    .section-light .section-desc {
      color: var(--text-dark);
    }
    
    /* 卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 28px;
    }
    
    .service-card {
      background: rgba(27, 26, 59, 0.7);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-xl);
      padding: 32px 24px;
      transition: all 0.3s ease;
      box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    }
    
    .section-light .service-card {
      background: white;
      border: 1px solid rgba(0,0,0,0.05);
      box-shadow: var(--card-shadow-light);
    }
    
    .service-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 16px 36px var(--card-glow);
    }
    
    .card-icon {
      font-size: 2.2rem;
      color: var(--accent-cyan);
      margin-bottom: 20px;
    }
    
    .card-title {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    
    .case-card img {
      border-radius: 16px 16px 0 0;
      height: 200px;
      object-fit: cover;
      width: 100%;
    }
    
    .case-content {
      padding: 20px;
      background: rgba(27,26,59,0.8);
      backdrop-filter: blur(8px);
      border-radius: 0 0 16px 16px;
    }
    
    /* FAQ */
    .accordion-item {
      background: rgba(255,255,255,0.05);
      border: 1px solid var(--border-glass);
      border-radius: 16px;
      margin-bottom: 14px;
      overflow: hidden;
    }
    
    .accordion-header {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    
    .accordion-content {
      padding: 0 24px 18px;
      display: none;
    }
    
    .accordion-item.active .accordion-content {
      display: block;
    }
    
    /* CTA */
    .cta-block {
      background: linear-gradient(135deg, #1B1A3B, #0D0B1E);
      text-align: center;
    }
    
    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }
    
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-stats {
        justify-content: center;
      }
      .channel-tabs {
        gap: 6px;
      }
    }