/* roulang page: index */
:root {
      --primary: #E43D2A;
      --primary-dark: #C53030;
      --primary-light: #FEF2F2;
      --secondary: #0B1D3A;
      --accent: #F5A623;
      --bg-light: #F8F9FA;
      --white: #FFFFFF;
      --text-main: #333333;
      --text-weak: #6B7280;
      --text-heading: #0B1D3A;
      --border: #E5E7EB;
      --border-focus: #E43D2A;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 24px;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 24px rgba(228,61,42,0.12);
      --transition: all 0.25s ease;
    }

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.75;
      font-size: 1rem;
      padding-top: 100px; /* 导航占位 */
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button, .button {
      cursor: pointer;
      font-family: inherit;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航系统 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(229,231,235,0.5);
      transition: var(--transition);
    }

    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.05);
      background: rgba(255,255,255,0.95);
    }

    .nav-row-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 56px;
      padding: 0 32px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--secondary);
      letter-spacing: 0.5px;
    }

    .brand i {
      color: var(--primary);
      font-size: 1.8rem;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .search-icon {
      font-size: 1.2rem;
      color: var(--text-weak);
      cursor: default;
      transition: var(--transition);
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.95rem;
      transition: var(--transition);
      box-shadow: 0 4px 10px rgba(228,61,42,0.2);
      white-space: nowrap;
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 6px 16px rgba(228,61,42,0.35);
      transform: translateY(-1px);
    }

    .nav-row-bottom {
      background: transparent;
      border-top: 1px solid rgba(229,231,235,0.6);
      height: 44px;
      display: flex;
      align-items: center;
      overflow-x: auto;
      white-space: nowrap;
      padding: 0 32px;
      max-width: 1200px;
      margin: 0 auto;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .nav-row-bottom::-webkit-scrollbar {
      display: none;
    }

    .nav-pill {
      display: inline-flex;
      align-items: center;
      padding: 6px 18px;
      border-radius: var(--radius-pill);
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-main);
      margin-right: 8px;
      transition: var(--transition);
      background: transparent;
      letter-spacing: 0.3px;
    }

    .nav-pill.active, .nav-pill:hover {
      background: var(--primary);
      color: white;
      box-shadow: 0 2px 8px rgba(228,61,42,0.25);
    }

    /* 区块间距 */
    .section {
      padding: 80px 0;
    }

    .section-dark {
      background: var(--secondary);
      color: white;
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, rgba(11,29,58,0.88) 0%, rgba(228,61,42,0.75) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: white;
      padding: 100px 0 90px;
      text-align: center;
    }

    .hero h1 {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .hero .sub {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 32px;
    }

    .metrics-row {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 40px;
      margin: 40px 0 32px;
    }
    .metric-item {
      text-align: center;
    }
    .metric-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
    }
    .metric-label {
      font-size: 0.9rem;
      opacity: 0.8;
    }

    .btn-outline-light {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      margin-left: 16px;
      transition: var(--transition);
    }
    .btn-outline-light:hover {
      background: white;
      color: var(--primary);
    }

    /* 指标卡 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 24px;
    }
    .stat-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      box-shadow: var(--shadow-card);
      text-align: center;
      border: 1px solid var(--border);
      transition: var(--transition);
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }
    .stat-card .big-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }

    /* 服务卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }
    .service-icon {
      font-size: 2rem;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .service-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    /* 对比条 */
    .compare-row {
      display: flex;
      align-items: center;
      margin: 16px 0;
    }
    .compare-label {
      width: 120px;
      font-weight: 600;
    }
    .compare-bars {
      flex: 1;
      display: flex;
      gap: 8px;
      height: 8px;
      border-radius: 4px;
      overflow: hidden;
    }
    .bar-old {
      background: #D1D5DB;
      width: 40%;
    }
    .bar-new {
      background: var(--primary);
      width: 60%;
    }

    .faq-accordion .accordion-title {
      font-weight: 700;
      font-size: 1rem;
      background: white;
      border-left: 4px solid transparent;
      transition: 0.2s;
    }
    .faq-accordion .is-active .accordion-title {
      border-left-color: var(--primary);
      color: var(--primary);
    }

    .footer {
      background: var(--secondary);
      color: #9CA3AF;
      padding: 60px 0 30px;
    }
    .footer a:hover {
      color: var(--accent);
    }

    @media (max-width: 1024px) {
      .stats-grid, .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      body {
        padding-top: 120px;
      }
      .stats-grid, .service-grid {
        grid-template-columns: 1fr;
      }
      .hero h1 {
        font-size: 1.9rem;
      }
      .metrics-row {
        gap: 20px;
      }
      .nav-row-bottom {
        padding: 0 16px;
      }
    }