/* roulang page: index */
:root {
      --primary: #6C3CF0;
      --primary-hover: #8B5CF6;
      --accent: #00F0A8;
      --bg-deep: #0A0E27;
      --bg-panel: #1A1F3A;
      --card-light: #F5F3FF;
      --card-border: rgba(108, 60, 240, 0.15);
      --text-primary: #FFFFFF;
      --text-secondary: #C9C5E0;
      --text-muted: #A09BB8;
      --border-light: #E0DBF5;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.12);
      --shadow-glow: 0 16px 40px rgba(108, 60, 240, 0.25);
      --radius-lg: 20px;
      --radius-btn: 50px;
      --font-sans: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
      --transition-smooth: all 0.3s ease;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.7;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    
    a {
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 导航栏自定义 */
    .navbar {
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(108, 60, 240, 0.3);
      padding: 0.75rem 0;
    }
    
    .navbar-brand {
      font-weight: 800;
      font-size: 1.8rem;
      background: linear-gradient(135deg, var(--primary), var(--primary-hover));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      letter-spacing: -0.5px;
    }
    
    .navbar-brand i {
      background: none;
      -webkit-text-fill-color: var(--accent);
      font-size: 1.9rem;
    }
    
    .nav-link {
      color: var(--text-secondary) !important;
      font-weight: 500;
      margin: 0 0.25rem;
      padding: 0.5rem 1rem !important;
      border-radius: 30px;
      transition: var(--transition-smooth);
    }
    
    .nav-link:hover, .nav-link.active {
      color: white !important;
      background: rgba(108, 60, 240, 0.2);
    }
    
    .search-box {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(108, 60, 240, 0.25);
      border-radius: 30px;
      padding: 0.4rem 1rem;
      color: white;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      transition: var(--transition-smooth);
    }
    
    .search-box input {
      background: transparent;
      border: none;
      color: white;
      width: 120px;
      outline: none;
    }
    
    .search-box input::placeholder {
      color: var(--text-muted);
    }
    
    .btn-outline-primary-custom {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      border-radius: var(--radius-btn);
      padding: 0.5rem 1.8rem;
      font-weight: 600;
      transition: var(--transition-smooth);
    }
    
    .btn-outline-primary-custom:hover {
      background: var(--primary);
      color: white;
    }
    
    .btn-primary-glow {
      background: linear-gradient(135deg, var(--primary), var(--primary-hover));
      border: none;
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.6rem 1.8rem;
      font-weight: 600;
      box-shadow: 0 4px 15px rgba(108, 60, 240, 0.4);
      transition: var(--transition-smooth);
    }
    
    .btn-primary-glow:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--accent));
      color: white;
      box-shadow: 0 8px 25px rgba(0, 240, 168, 0.5);
      transform: scale(1.03);
    }
    
    .btn-cta {
      padding: 1rem 2.8rem;
      font-size: 1.2rem;
      background: linear-gradient(135deg, var(--primary), var(--primary-hover));
      border: none;
      color: white;
      border-radius: var(--radius-btn);
      font-weight: 700;
      box-shadow: 0 0 25px rgba(108, 60, 240, 0.6);
      animation: pulseGlow 2s infinite;
      transition: var(--transition-smooth);
    }
    
    .btn-cta:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--accent));
      box-shadow: 0 0 40px rgba(0, 240, 168, 0.7);
      transform: translateY(-2px);
      color: white;
    }
    
    @keyframes pulseGlow {
      0% { box-shadow: 0 0 15px rgba(108, 60, 240, 0.5); }
      50% { box-shadow: 0 0 35px rgba(108, 60, 240, 0.8), 0 0 50px rgba(0,240,168,0.3); }
      100% { box-shadow: 0 0 15px rgba(108, 60, 240, 0.5); }
    }
    
    /* 区块间距 */
    section {
      padding: 100px 0;
    }
    
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 1rem;
      position: relative;
      display: inline-block;
    }
    
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 0;
      width: 60px;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      border-radius: 4px;
    }
    
    .text-accent {
      color: var(--accent);
    }
    
    /* Hero区域 */
    #hero {
      background: linear-gradient(135deg, #0A0E27 0%, #1A1040 50%, #0A0E27 100%);
      position: relative;
      overflow: hidden;
      min-height: 90vh;
      display: flex;
      align-items: center;
    }
    
    #hero::before {
      content: "";
      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;
    }
    
    .floating-cards {
      position: relative;
      z-index: 2;
    }
    
    .data-card {
      background: rgba(26, 31, 58, 0.8);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(108, 60, 240, 0.4);
      border-radius: 20px;
      padding: 1.5rem;
      color: white;
      box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    }
    
    .counter {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent);
    }
    
    /* 指标看板 */
    .metric-card {
      background: var(--bg-panel);
      border-radius: var(--radius-lg);
      padding: 2rem;
      border: 1px solid rgba(108,60,240,0.2);
      transition: var(--transition-smooth);
    }
    
    .metric-card:hover {
      border-color: var(--accent);
      box-shadow: 0 8px 30px rgba(0,240,168,0.2);
    }
    
    .metric-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent);
    }
    
    /* 服务卡片 */
    .service-card {
      background: var(--card-light);
      border-radius: var(--radius-lg);
      padding: 2rem;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-glow);
      border-color: var(--primary);
    }
    
    .icon-circle {
      width: 64px;
      height: 64px;
      background: linear-gradient(135deg, var(--primary), var(--primary-hover));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 2rem;
      margin-bottom: 1.5rem;
    }
    
    /* 对比卡片 */
    .compare-card {
      background: #2A2A3A;
      border-radius: var(--radius-lg);
      padding: 2rem;
      border: 1px solid rgba(255,255,255,0.1);
    }
    
    .compare-card.highlight {
      background: var(--bg-panel);
      border: 1px solid var(--primary);
      box-shadow: 0 0 25px rgba(108,60,240,0.4);
      animation: borderGlow 2s infinite alternate;
    }
    
    @keyframes borderGlow {
      0% { border-color: var(--primary); box-shadow: 0 0 15px rgba(108,60,240,0.4); }
      100% { border-color: var(--accent); box-shadow: 0 0 30px rgba(0,240,168,0.5); }
    }
    
    /* FAQ */
    .accordion-button {
      background: rgba(26,31,58,0.8);
      color: white;
      font-weight: 600;
      border-radius: 12px !important;
      border: 1px solid rgba(108,60,240,0.2);
    }
    
    .accordion-button:not(.collapsed) {
      background: var(--primary);
      color: white;
      box-shadow: none;
    }
    
    .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 1rem;
    }
    
    /* 页脚 */
    footer {
      background: var(--bg-deep);
      border-top: 1px solid rgba(108,60,240,0.3);
    }
    
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .navbar-brand {
        font-size: 1.4rem;
      }
      .metric-number, .counter {
        font-size: 1.8rem;
      }
      .btn-cta {
        padding: 0.8rem 2rem;
        font-size: 1rem;
      }
    }