/* roulang page: index */
:root {
      --primary-cyan: #00F0FF;
      --secondary-purple: #7B2FFF;
      --accent-orange: #FF5E13;
      --bg-deep: #0A0E1A;
      --bg-card: rgba(255,255,255,0.04);
      --glass-border: rgba(0,240,255,0.15);
      --text-white: #FFFFFF;
      --text-light: rgba(255,255,255,0.7);
      --text-muted: rgba(255,255,255,0.5);
      --font-mono: 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
      --radius-card: 16px;
      --radius-button: 50px;
      --shadow-glow: 0 8px 32px rgba(0,240,255,0.08);
      --transition-smooth: 0.3s ease;
      --container-max: 1280px;
      --section-gap: 100px;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-white);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }
    
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10,14,26,0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--glass-border);
      z-index: 1000;
      transition: var(--transition-smooth);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 16px 24px;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-white);
      text-decoration: none;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo span {
      background: linear-gradient(135deg, var(--primary-cyan), var(--secondary-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-light);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-cyan);
      box-shadow: 0 0 10px var(--primary-cyan);
      transition: width 0.3s;
    }
    .nav-links a:hover {
      color: var(--primary-cyan);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }
    .menu-toggle span {
      width: 25px;
      height: 2px;
      background: var(--text-white);
      border-radius: 2px;
      transition: 0.3s;
    }
    
    /* 移动端导航面板 */
    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 280px;
      height: 100vh;
      background: rgba(10,14,26,0.95);
      backdrop-filter: blur(25px);
      -webkit-backdrop-filter: blur(25px);
      border-left: 1px solid var(--glass-border);
      padding: 80px 30px;
      display: flex;
      flex-direction: column;
      gap: 28px;
      transition: right 0.4s ease;
      z-index: 1001;
    }
    .mobile-menu.active {
      right: 0;
    }
    .mobile-menu a {
      color: var(--text-white);
      font-size: 18px;
      font-weight: 500;
      text-decoration: none;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding-bottom: 12px;
    }
    .close-menu {
      position: absolute;
      top: 24px;
      right: 24px;
      background: none;
      border: none;
      color: white;
      font-size: 28px;
      cursor: pointer;
    }
    
    /* 通用区块 */
    section {
      padding: var(--section-gap) 0;
    }
    
    /* 首屏 Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      position: relative;
      margin-top: 0;
      padding-top: 80px;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(0,240,255,0.15) 0%, rgba(10,14,26,0.8) 70%);
    }
    .hero-content {
      position: relative;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    .hero-text h1 {
      font-size: 48px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin-bottom: 24px;
    }
    .hero-text .highlight {
      background: linear-gradient(135deg, var(--primary-cyan), var(--secondary-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-text p {
      font-size: 18px;
      color: var(--text-light);
      margin-bottom: 32px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #00F0FF, #7B2FFF);
      border: none;
      color: white;
      padding: 14px 36px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      box-shadow: 0 0 18px rgba(0,240,255,0.5);
      transition: all 0.3s ease;
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary:hover {
      box-shadow: 0 0 28px rgba(0,240,255,0.8);
      transform: scale(1.04);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      padding: 14px 36px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: 0.3s;
      text-decoration: none;
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.1);
      border-color: white;
    }
    .hero-stats {
      flex: 0 0 280px;
      display: flex;
      flex-direction: column;
      gap: 24px;
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: 24px;
      padding: 32px 24px;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 42px;
      font-weight: 700;
      color: var(--primary-cyan);
      text-shadow: 0 0 15px rgba(0,240,255,0.6);
    }
    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 8px;
    }
    
    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .glass-card {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 28px;
      transition: var(--transition-smooth);
      box-shadow: var(--shadow-glow);
    }
    .glass-card:hover {
      border-color: rgba(0,240,255,0.4);
      transform: translateY(-4px);
      box-shadow: 0 12px 36px rgba(0,240,255,0.15);
    }
    .dashboard-value {
      font-family: var(--font-mono);
      font-size: 42px;
      color: var(--primary-cyan);
    }
    
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 28px;
      transition: 0.3s;
      position: relative;
    }
    .service-card:hover {
      border-color: rgba(0,240,255,0.4);
      transform: translateY(-4px);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      border-radius: 16px;
      background: rgba(0,240,255,0.1);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .service-icon img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .decor-line {
      height: 2px;
      background: linear-gradient(90deg, var(--primary-cyan), var(--secondary-purple));
      margin-top: 20px;
    }
    
    /* 对比表 */
    .compare-wrapper {
      display: flex;
      gap: 30px;
      flex-wrap: wrap;
    }
    .compare-col {
      flex: 1;
      background: rgba(255,255,255,0.03);
      border-radius: 20px;
      padding: 28px;
    }
    .compare-row {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .badge-advantage {
      background: var(--accent-orange);
      color: black;
      font-weight: bold;
      padding: 2px 12px;
      border-radius: 20px;
      font-size: 12px;
    }
    
    /* FAQ */
    .faq-item {
      background: rgba(255,255,255,0.03);
      border: 1px solid transparent;
      border-radius: 12px;
      margin-bottom: 16px;
      transition: 0.3s;
    }
    .faq-item.active {
      border-color: var(--primary-cyan);
      border-left: 3px solid var(--primary-cyan);
    }
    .faq-question {
      padding: 20px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    
    /* CTA */
    .cta-section {
      background: rgba(0,240,255,0.03);
      backdrop-filter: blur(10px);
      text-align: center;
      border-radius: 32px;
      padding: 60px 24px;
    }
    
    /* 页脚 */
    .footer {
      background: #050812;
      padding: 40px 0;
      text-align: center;
      color: var(--text-muted);
    }
    
    @media (max-width: 1024px) {
      .dashboard-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: flex; }
      .hero-content { flex-direction: column; }
      .hero-text h1 { font-size: 32px; }
      .dashboard-grid, .services-grid { grid-template-columns: 1fr; }
      .compare-wrapper { flex-direction: column; }
      section { padding: 60px 0; }
    }