/* roulang page: index */
:root {
      --primary-deep: #0B4F4C;
      --primary-soft: #E8F3F1;
      --accent-amber: #E89B3A;
      --accent-glow: #2ED9C3;
      --bg-light: #F4F7F6;
      --text-dark: #1A2B2A;
      --text-muted: #5F7270;
      --border-light: rgba(11,79,76,0.08);
      --shadow-sm: 0 4px 20px rgba(11,79,76,0.06);
      --shadow-hover: 0 12px 32px rgba(11,79,76,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --transition: 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      margin: 0;
      padding: 0;
      background: #ffffff;
      color: var(--text-dark);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: var(--primary-deep);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--accent-glow);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航样式 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(244,247,246,0.85);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid transparent;
      transition: var(--transition);
    }
    .site-header.scrolled {
      background: rgba(244,247,246,0.96);
      box-shadow: 0 2px 16px rgba(0,0,0,0.05);
      border-bottom: 1px solid var(--border-light);
    }
    .nav-first {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 24px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--primary-deep);
      line-height: 1.2;
    }
    .logo-sub {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 400;
    }
    .search-cta {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .search-icon {
      font-size: 1.3rem;
      color: var(--primary-deep);
      cursor: pointer;
      transition: 0.2s;
    }
    .search-icon:hover {
      color: var(--accent-glow);
    }
    .search-box {
      display: none;
      position: absolute;
      right: 120px;
      top: 18px;
    }
    .search-box input {
      border-radius: 20px;
      border: 1px solid var(--border-light);
      padding: 6px 16px;
      outline: none;
      background: white;
    }
    .btn-outline-sm {
      border: 1px solid var(--accent-amber);
      color: var(--accent-amber);
      background: transparent;
      padding: 6px 18px;
      border-radius: 20px;
      font-weight: 600;
      transition: 0.2s;
      cursor: pointer;
    }
    .btn-outline-sm:hover {
      background: var(--accent-amber);
      color: white;
    }
    .channel-tabs {
      background: transparent;
      padding: 0 24px 10px;
      display: flex;
      gap: 10px;
      flex-wrap: nowrap;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .channel-tabs::-webkit-scrollbar {
      display: none;
    }
    .channel-pill {
      white-space: nowrap;
      padding: 8px 20px;
      border-radius: 20px;
      font-weight: 500;
      background: var(--bg-light);
      color: var(--primary-deep);
      transition: var(--transition);
      font-size: 0.95rem;
      border: none;
      cursor: pointer;
    }
    .channel-pill.active {
      background: var(--primary-deep);
      color: white;
      font-weight: 600;
    }
    .channel-pill:hover:not(.active) {
      background: #d9e8e5;
    }
    @media (max-width: 768px) {
      .nav-first {
        flex-wrap: wrap;
      }
      .search-cta {
        margin-top: 6px;
      }
      .channel-tabs {
        padding: 0 16px 10px;
      }
    }
    /* Hero */
    #hero {
      padding: 160px 0 100px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      background-color: #0a3a37;
    }
    #hero::before {
      content: '';
      position: absolute;
      top:0;left:0;right:0;bottom:0;
      background: linear-gradient(135deg, rgba(11,79,76,0.9) 0%, rgba(11,79,76,0.4) 100%);
    }
    .hero-content {
      position: relative;
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-left {
      flex: 1;
      color: white;
    }
    .hero-left h1 {
      font-size: 3rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
      margin-bottom: 1.2rem;
      text-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
    .hero-sub {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 2rem;
    }
    .btn-primary {
      background: var(--accent-amber);
      color: white;
      border: none;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      transition: var(--transition);
      cursor: pointer;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: #D48620;
      box-shadow: 0 0 18px rgba(232,155,58,0.4);
      color: white;
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid white;
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      margin-left: 16px;
      transition: 0.2s;
      cursor: pointer;
    }
    .btn-secondary:hover {
      background: white;
      color: var(--primary-deep);
    }
    .hero-right {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .metric-card {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(8px);
      border-radius: 16px;
      padding: 20px;
      color: white;
      border: 1px solid rgba(255,255,255,0.2);
    }
    .metric-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent-glow);
    }
    @media (max-width: 768px) {
      .hero-content {
        flex-direction: column;
      }
      .hero-left h1 {
        font-size: 2.2rem;
      }
      .btn-secondary {
        margin-left: 0;
        margin-top: 10px;
      }
    }
    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--primary-deep);
    }
    .bg-light {
      background: var(--bg-light);
    }
    /* 指标看板 */
    #metrics .metric-grid {
      display: flex;
      gap: 30px;
      flex-wrap: wrap;
    }
    .stat-item {
      background: white;
      padding: 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      flex: 1;
      min-width: 180px;
    }
    .stat-value {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-amber);
    }
    /* 服务矩阵 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 28px;
      margin-top: 32px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: var(--transition);
      border: 1px solid var(--border-light);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .card-img {
      height: 160px;
      background: #e0f0ef;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .card-body {
      padding: 24px;
    }
    .text-link {
      color: var(--primary-deep);
      font-weight: 600;
      transition: 0.2s;
    }
    .text-link i {
      margin-left: 4px;
      transition: 0.2s;
    }
    .text-link:hover i {
      transform: translateX(4px);
    }
    /* 对比区 */
    .comparison-row {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
    }
    .compare-col {
      flex: 1;
      background: white;
      padding: 24px;
      border-radius: var(--radius-card);
    }
    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      margin-top: 40px;
    }
    .step {
      text-align: center;
      flex:1;
    }
    .step-num {
      background: var(--primary-deep);
      color: white;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    @media (max-width: 640px) {
      .steps {
        flex-direction: column;
        gap: 24px;
      }
    }
    /* FAQ */
    .accordion-title {
      background: var(--bg-light);
      padding: 16px;
      border-radius: 8px;
      font-weight: 600;
      cursor: pointer;
    }
    .accordion-content {
      padding: 0 16px;
      max-height: 0;
      overflow: hidden;
      transition: 0.25s ease;
    }
    /* CTA */
    #cta {
      background: var(--primary-deep);
      color: white;
      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 1fr;
      }
    }
    .copyright {
      background: #083835;
      color: #ccc;
      text-align: center;
      padding: 20px;
    }