/* roulang page: index */
:root {
      --primary-color: #1E56A0;
      --primary-hover: #163f75;
      --accent-color: #00A896;
      --accent-hover: #028a7b;
      --bg-page: #F6F8FB;
      --bg-card: #FFFFFF;
      --bg-dark: #0F1B29;
      --text-main: #1A2530;
      --text-muted: #5A6E85;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 4px 20px rgba(30, 86, 160, 0.06);
      --shadow-hover: 0 12px 30px rgba(30, 86, 160, 0.12);
      --transition: all 0.28s ease-in-out;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-page);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a { color: var(--primary-color); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--accent-color); }
    h1, h2, h3, h4, h5 { color: var(--text-main); font-weight: 700; line-height: 1.35; margin-bottom: 0.75rem; }
    p { margin-bottom: 1rem; color: var(--text-muted); }

    /* 顶栏 Header */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 72px;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      z-index: 1000;
      display: flex;
      align-items: center;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .site-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary-color);
      letter-spacing: -0.5px;
    }
    .site-logo i {
      font-size: 1.6rem;
      color: var(--accent-color);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* 按钮规范 */
    .btn-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--primary-color);
      color: #fff !important;
      padding: 11px 24px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      border: 1px solid var(--primary-color);
      box-shadow: 0 4px 14px rgba(30, 86, 160, 0.25);
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-main:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 20px rgba(30, 86, 160, 0.35);
      transform: translateY(-2px);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #fff;
      color: var(--primary-color) !important;
      padding: 11px 24px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--primary-color);
      color: var(--primary-hover) !important;
      background: rgba(30, 86, 160, 0.04);
      transform: translateY(-2px);
    }
    .btn-accent {
      background: var(--accent-color);
      border-color: var(--accent-color);
      color: #fff !important;
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      border-color: var(--accent-hover);
    }

    .menu-trigger {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      background: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--text-main);
      cursor: pointer;
      transition: var(--transition);
    }
    .menu-trigger:hover {
      background: var(--bg-page);
      border-color: var(--primary-color);
      color: var(--primary-color);
    }

    /* 侧滑抽屉导航 (Drawer) */
    .drawer-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(15, 27, 41, 0.6);
      backdrop-filter: blur(4px);
      z-index: 1050;
      opacity: 0;
      visibility: hidden;
      transition: var(--transition);
    }
    .drawer-overlay.active {
      opacity: 1;
      visibility: visible;
    }
    .drawer-panel {
      position: fixed;
      top: 0;
      right: -420px;
      width: 380px;
      max-width: 100%;
      height: 100vh;
      background: #fff;
      z-index: 1060;
      box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
      transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
      display: flex;
      flex-direction: column;
      padding: 32px 28px;
    }
    .drawer-overlay.active .drawer-panel {
      transform: translateX(-420px);
    }
    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 28px;
    }
    .drawer-close {
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-muted);
      cursor: pointer;
      transition: var(--transition);
    }
    .drawer-close:hover { color: var(--text-main); }
    .drawer-links {
      list-style: none;
      margin: 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 16px;
      flex-grow: 1;
    }
    .drawer-links a {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      background: transparent;
      transition: var(--transition);
    }
    .drawer-links a:hover {
      background: var(--bg-page);
      color: var(--primary-color);
      transform: translateX(4px);
    }
    .drawer-footer {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }
    .drawer-contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    /* 板块通用间距 */
    .app-section {
      padding: 96px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(30, 86, 160, 0.08);
      color: var(--primary-color);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.25rem;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.05rem;
      line-height: 1.8;
      color: var(--text-muted);
    }

    /* 卡片通用 */
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(30, 86, 160, 0.3);
    }

    /* 1. Hero 痛点对比区 */
    .hero-section {
      padding-top: 144px;
      padding-bottom: 88px;
      background: linear-gradient(180deg, #FFFFFF 0%, #F0F4FA 100%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-heading {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      color: var(--text-main);
    }
    .hero-heading span {
      color: var(--primary-color);
    }
    .hero-lead {
      font-size: 1.12rem;
      line-height: 1.85;
      color: var(--text-muted);
      margin-bottom: 32px;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .hero-metrics {
      display: flex;
      gap: 32px;
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
    }
    .hero-metric-item h4 {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary-color);
      margin: 0;
    }
    .hero-metric-item p {
      font-size: 13px;
      margin: 0;
      color: var(--text-muted);
    }

    /* Hero 对比看板组件 */
    .compare-stage {
      background: #fff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: 0 16px 40px rgba(15, 27, 41, 0.08);
      overflow: hidden;
    }
    .stage-header {
      background: #1A2530;
      color: #fff;
      padding: 14px 20px;
      font-size: 14px;
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .stage-body {
      padding: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .compare-side {
      padding: 18px;
      border-radius: var(--radius-sm);
    }
    .compare-side.legacy {
      background: #FFF5F5;
      border: 1px dashed #FEB2B2;
    }
    .compare-side.digital {
      background: #EBF8FF;
      border: 1px solid #90CDF4;
    }
    .compare-title {
      font-weight: 700;
      font-size: 15px;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .legacy .compare-title { color: #C53030; }
    .digital .compare-title { color: var(--primary-color); }
    .compare-list {
      list-style: none;
      margin: 0;
      padding: 0;
      font-size: 13px;
    }
    .compare-list li {
      margin-bottom: 8px;
      display: flex;
      align-items: flex-start;
      gap: 6px;
      color: #4A5568;
    }
    .legacy .compare-list li i { color: #E53E3E; margin-top: 3px; }
    .digital .compare-list li i { color: var(--accent-color); margin-top: 3px; }

    /* 2. 综合架构区 */
    .arch-preview {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }
    .arch-preview img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      display: block;
    }
    .arch-badge-overlay {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background: rgba(15, 27, 41, 0.85);
      backdrop-filter: blur(8px);
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .arch-badge-overlay strong {
      display: block;
      color: var(--accent-color);
      font-size: 1.1rem;
    }
    .arch-badge-overlay span {
      font-size: 13px;
      color: #CBD5E0;
    }

    /* 3. 痛点对比板块 */
    .pain-box {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border-color);
      height: 100%;
    }
    .pain-item {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
    }
    .pain-item:last-child { margin-bottom: 0; }
    .pain-icon {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-size: 16px;
    }
    .pain-icon.danger { background: #FFF5F5; color: #E53E3E; }
    .pain-icon.success { background: #E6FFFA; color: var(--accent-color); }

    /* 4. 核心功能网格 */
    .func-icon {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      background: rgba(30, 86, 160, 0.08);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      transition: var(--transition);
    }
    .feature-card:hover .func-icon {
      background: var(--primary-color);
      color: #fff;
    }

    /* 5. 多端产品矩阵 */
    .matrix-card {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .matrix-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .matrix-top {
      padding: 24px;
      background: linear-gradient(135deg, #F8FAFC 0%, #EDF2F7 100%);
      border-bottom: 1px solid var(--border-color);
    }
    .matrix-tag {
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      background: var(--primary-color);
      color: #fff;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .matrix-body {
      padding: 24px;
      flex-grow: 1;
    }
    .spec-item {
      display: flex;
      justify-content: space-between;
      padding: 10px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 14px;
    }
    .spec-item:last-child { border-bottom: none; }
    .spec-label { color: var(--text-muted); }
    .spec-val { font-weight: 600; color: var(--text-main); }

    /* 6. 流程步骤条 */
    .step-flow {
      position: relative;
    }
    .step-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      position: relative;
      height: 100%;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #fff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 16px;
    }

    /* 7. 深色案例对比区 */
    .dark-section {
      background: var(--bg-dark);
      color: #fff;
      padding: 96px 0;
    }
    .dark-section h2, .dark-section h3, .dark-section h4 { color: #fff; }
    .dark-section p { color: #A0AEC0; }
    .dark-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 32px;
      backdrop-filter: blur(10px);
    }
    .tech-pill {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 168, 150, 0.2);
      border: 1px solid var(--accent-color);
      color: var(--accent-color);
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      margin-right: 8px;
      margin-bottom: 8px;
    }

    /* 8. 标杆故事区 */
    .story-card {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .story-img-wrap {
      height: 100%;
      min-height: 280px;
    }
    .story-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-content {
      padding: 36px 32px;
    }

    /* 9. 运行数据指标条 */
    .stats-bar {
      background: linear-gradient(90deg, #1E56A0 0%, #163f75 100%);
      padding: 64px 0;
      color: #fff;
    }
    .stat-item {
      text-align: center;
      border-right: 1px solid rgba(255, 255, 255, 0.15);
    }
    .stat-item:last-child { border-right: none; }
    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: #fff;
      line-height: 1;
      margin-bottom: 8px;
    }
    .stat-number span { color: var(--accent-color); }
    .stat-desc {
      font-size: 15px;
      color: #E2E8F0;
      margin: 0;
    }

    /* 10. 评价区 */
    .testi-card {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #ECC94B;
      margin-bottom: 16px;
      font-size: 14px;
    }
    .testi-quote {
      font-style: italic;
      color: var(--text-main);
      font-size: 15px;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-page);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary-color);
      border: 1px solid var(--border-color);
    }

    /* 11. 资讯动态摘要 */
    .news-card {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .news-thumb {
      height: 190px;
      overflow: hidden;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }
    .news-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.4;
    }

    /* 12. FAQ 折叠面板 */
    .faq-item {
      background: #fff;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: var(--text-main);
    }
    .faq-trigger:hover { color: var(--primary-color); }
    .faq-content {
      padding: 0 24px 20px;
      display: none;
      color: var(--text-muted);
      font-size: 15px;
      border-top: 1px dashed var(--border-color);
      margin-top: 4px;
      padding-top: 14px;
    }
    .faq-item.open .faq-content { display: block; }
    .faq-item.open .faq-trigger i { transform: rotate(180deg); }

    /* 13. 转化收口区 */
    .cta-banner {
      background: linear-gradient(135deg, #1E56A0 0%, #0F1B29 100%);
      border-radius: var(--radius-lg);
      padding: 64px 48px;
      color: #fff;
      box-shadow: 0 20px 50px rgba(15, 27, 41, 0.2);
    }
    .cta-banner h2 { color: #fff; font-size: 2.2rem; }
    .cta-banner p { color: #CBD5E0; font-size: 1.1rem; }

    /* 页脚 Footer */
    .site-footer {
      background: #0B131D;
      color: #A0AEC0;
      padding: 64px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14px;
    }
    .site-footer h5 {
      color: #fff;
      font-size: 1.05rem;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a { color: #A0AEC0; }
    .footer-links a:hover { color: #fff; }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      margin-top: 48px;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-heading { font-size: 2.35rem; }
      .app-section { padding: 64px 0; }
    }
    @media (max-width: 768px) {
      .stage-body { grid-template-columns: 1fr; }
      .hero-heading { font-size: 1.95rem; }
      .hero-metrics { flex-direction: column; gap: 16px; }
      .stat-item { border-right: none; border-bottom: 1px solid rgba(255, 255, 255, 0.15); padding-bottom: 20px; margin-bottom: 20px; }
      .cta-banner { padding: 36px 24px; }
      .cta-banner h2 { font-size: 1.65rem; }
    }