/* roulang page: index */
:root {
      --bg-deep: #1a1d23;
      --card-bg: #242830;
      --accent-cyan: #00e5bf;
      --warm-orange: #ff6e40;
      --text-primary: #f4f6f9;
      --text-secondary: rgba(255,255,255,0.7);
      --text-muted: rgba(255,255,255,0.5);
      --border-subtle: rgba(255,255,255,0.08);
      --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
      --shadow-hover: 0 12px 32px rgba(0,229,191,0.2);
      --radius-lg: 16px;
      --radius-btn: 50px;
      --radius-img: 12px;
      --spacing-section: 100px;
      --transition: 0.25s ease;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      background-color: var(--bg-deep);
      font-family: var(--font-stack);
      color: var(--text-primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航 */
    .nav-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(26, 29, 35, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      z-index: 100;
      display: flex;
      align-items: center;
      transition: var(--transition);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      font-size: 28px;
      color: var(--accent-cyan);
      display: flex;
      align-items: center;
    }

    .logo-text {
      font-weight: 700;
      font-size: 20px;
      color: #fff;
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-links a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 15px;
      position: relative;
      padding: 4px 0;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-cyan);
    }

    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-cyan);
      border-radius: 2px;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .search-trigger {
      color: var(--text-secondary);
      font-size: 18px;
      cursor: pointer;
      transition: var(--transition);
    }

    .search-trigger:hover {
      color: var(--accent-cyan);
    }

    .login-link {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 14px;
    }

    .btn-capsule {
      background: var(--accent-cyan);
      color: #1a1d23;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-size: 14px;
      transition: var(--transition);
      box-shadow: 0 0 20px rgba(0,229,191,0.3);
      border: none;
      cursor: pointer;
    }

    .btn-capsule:hover {
      background: var(--warm-orange);
      box-shadow: 0 0 28px rgba(255,110,64,0.5);
      transform: scale(1.03);
      color: #fff;
    }

    .hamburger {
      display: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }

    @media (max-width: 768px) {
      .nav-links, .nav-actions .login-link, .nav-actions .search-trigger {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .nav-actions {
        gap: 12px;
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, rgba(0,229,191,0.08) 0%, #1a1d23 70%);
      position: relative;
      overflow: hidden;
      padding-top: 72px;
    }

    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      flex-wrap: wrap;
    }

    .hero-text {
      flex: 1 1 500px;
    }

    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      color: #fff;
    }

    .hero .subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 500px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-outline {
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
      background: transparent;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-outline:hover {
      background: rgba(0,229,191,0.1);
      color: #fff;
    }

    .hero-visual {
      flex: 1 1 400px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-lg);
      height: 380px;
      box-shadow: var(--shadow-card);
      position: relative;
    }

    .live-badge {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: rgba(26,29,35,0.8);
      backdrop-filter: blur(8px);
      padding: 12px 20px;
      border-radius: 32px;
      color: var(--accent-cyan);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    @media (max-width: 768px) {
      .hero h1 {
        font-size: 34px;
      }
      .hero-visual {
        height: 260px;
      }
    }

    /* 板块通用 */
    .section {
      padding: 80px 0;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #fff;
    }

    .section-desc {
      color: var(--text-secondary);
      margin-bottom: 48px;
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-subtle);
      transition: var(--transition);
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0,229,191,0.3);
      box-shadow: var(--shadow-hover);
    }

    .service-icon {
      font-size: 40px;
      color: var(--accent-cyan);
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 20px;
      margin-bottom: 12px;
    }

    .text-link {
      color: var(--accent-cyan);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 数据徽章 */
    .stats-grid {
      display: flex;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
    }

    .stat-item {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      flex: 1;
      text-align: center;
      border: 1px solid var(--border-subtle);
    }

    .stat-number {
      font-size: 40px;
      font-weight: 700;
      color: var(--accent-cyan);
      font-variant-numeric: tabular-nums;
    }

    /* 解决方案 */
    .solution-row {
      display: flex;
      gap: 40px;
      align-items: center;
      margin-bottom: 60px;
      flex-wrap: wrap;
    }

    .solution-img {
      flex: 1 1 45%;
      border-radius: var(--radius-img);
      overflow: hidden;
    }

    /* 案例横向滚动 */
    .case-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: thin;
    }

    .case-card {
      min-width: 300px;
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 16px;
      flex-shrink: 0;
    }

    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      text-align: center;
      gap: 24px;
    }

    .step-badge {
      width: 48px;
      height: 48px;
      background: var(--accent-cyan);
      color: #1a1d23;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 16px;
    }

    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid var(--border-subtle);
    }

    .accordion-title {
      font-size: 18px;
      font-weight: 500;
      padding: 20px 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #00e5bf 0%, #1a1d23 100%);
      padding: 70px 0;
      text-align: center;
      border-radius: 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }

    @media (max-width: 768px) {
      .services-grid, .steps, .footer-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        flex-direction: column;
      }
      .section-title {
        font-size: 26px;
      }
    }