/* roulang page: index */
:root {
      --primary: #0369A1;
      --primary-hover: #0284C7;
      --primary-light: #E0F2FE;
      --dark: #0F172A;
      --dark-surface: #1E293B;
      --body-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-sub: #64748B;
      --border: #E2E8F0;
      --border-light: #F1F5F9;
      --success: #059669;
      --warning: #D97706;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 15px -3px rgba(15,23,42,0.04), 0 4px 6px -2px rgba(15,23,42,0.02);
      --shadow-lg: 0 20px 25px -5px rgba(15,23,42,0.08), 0 10px 10px -5px rgba(15,23,42,0.03);
      --radius: 12px;
      --radius-sm: 8px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--body-bg);
      color: var(--text-main);
      font-size: 16px;
    }

    body {
      line-height: 1.65;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    button, input, select, textarea {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部微型信息栏 */
    .top-bar {
      background-color: var(--dark);
      color: #94A3B8;
      font-size: 13px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 7px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .top-bar span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      transition: box-shadow 0.3s ease;
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary) 0%, #0284C7 100%);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-weight: 900;
      font-size: 18px;
    }
    .brand-logo-sub {
      display: block;
      font-size: 11px;
      color: var(--text-sub);
      font-weight: 500;
      letter-spacing: 1px;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      align-items: center;
      gap: 28px;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-menu a:hover {
      color: var(--primary);
    }
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: all 0.25s ease;
      transform: translateX(-50%);
    }
    .nav-menu a:hover::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn-header-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary);
      color: #FFF;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      border: 1px solid transparent;
      box-shadow: 0 2px 4px rgba(3, 105, 161, 0.2);
    }
    .btn-header-cta:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 移动端菜单抽屉 */
    .mobile-drawer {
      display: none;
      background: #FFF;
      border-bottom: 1px solid var(--border);
      padding: 18px 24px 24px;
    }
    .mobile-drawer.active {
      display: block;
    }
    .mobile-drawer ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .mobile-drawer a {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-muted);
      display: block;
      padding: 8px 0;
    }

    /* 统一 Section */
    section {
      padding: 88px 0;
      position: relative;
    }
    .section-light {
      background-color: #FFFFFF;
    }
    .section-alt {
      background-color: #F8FAFC;
    }
    .section-dark {
      background-color: var(--dark);
      color: #F8FAFC;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 56px auto;
    }
    .section-header.text-left {
      text-align: left;
      margin: 0 0 40px 0;
      max-width: 100%;
    }
    .section-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.8px;
      text-transform: uppercase;
      padding: 6px 14px;
      border-radius: 9999px;
      background-color: var(--primary-light);
      color: var(--primary);
      margin-bottom: 16px;
      border: 1px solid rgba(3, 105, 161, 0.15);
    }
    .section-dark .section-badge {
      background-color: rgba(3, 105, 161, 0.25);
      color: #7DD3FC;
      border-color: rgba(125, 211, 252, 0.2);
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
      margin-bottom: 18px;
      line-height: 1.35;
    }
    .section-dark .section-title {
      color: #F8FAFC;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-sub);
      line-height: 1.75;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 按钮组 */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--primary);
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
      padding: 14px 28px;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      box-shadow: 0 4px 6px -1px rgba(3, 105, 161, 0.25);
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 12px -2px rgba(3, 105, 161, 0.3);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: #FFFFFF;
      color: var(--text-main);
      font-size: 15px;
      font-weight: 600;
      padding: 14px 28px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* 板块一：Hero 区 */
    .hero-section {
      padding: 72px 0 96px 0;
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      border-bottom: 1px solid var(--border);
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 850;
      letter-spacing: -1px;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .hero-h1 span {
      color: var(--primary);
      background: linear-gradient(120deg, #0369A1, #0284C7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }
    .hero-trust-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid var(--border);
    }
    .trust-tag-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
    }
    .trust-tag-dot {
      width: 8px;
      height: 8px;
      background: var(--success);
      border-radius: 50%;
    }
    .hero-card-preview {
      background: #FFFFFF;
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
      overflow: hidden;
      position: relative;
    }
    .hero-card-header {
      background: #F8FAFC;
      border-bottom: 1px solid var(--border);
      padding: 14px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .window-dots {
      display: flex;
      gap: 6px;
    }
    .window-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #CBD5E1;
    }
    .window-title {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-sub);
    }
    .hero-img-box {
      position: relative;
      background: #0F172A;
    }
    .hero-img-box img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      opacity: 0.92;
    }
    .hero-floating-stat {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .floating-stat-item h4 {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
    }
    .floating-stat-item p {
      font-size: 12px;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 板块二：品牌总览 */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .overview-visual {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
    }
    .overview-visual img {
      width: 100%;
      height: 440px;
      object-fit: cover;
    }
    .overview-feature-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 24px;
    }
    .overview-feature-item {
      display: flex;
      gap: 16px;
      background: #FFFFFF;
      padding: 18px 22px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
    }
    .overview-icon-box {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 800;
      font-size: 18px;
      flex-shrink: 0;
    }

    /* 板块三：核心功能六宫格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 36px 30px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .feature-badge-top {
      width: 46px;
      height: 46px;
      border-radius: 10px;
      background: #F0F9FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 22px;
      font-weight: 700;
      border: 1px solid #BAE6FD;
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .feature-metric-tag {
      font-size: 13px;
      color: var(--primary);
      font-weight: 700;
      background: var(--primary-light);
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      align-self: flex-start;
    }

    /* 板块四：版本矩阵三列 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      align-items: center;
    }
    .product-tier-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 40px 32px;
      transition: all 0.3s ease;
      position: relative;
    }
    .product-tier-card.highlight {
      border: 2px solid var(--primary);
      transform: scale(1.03);
      box-shadow: var(--shadow-lg);
      background: #FFFFFF;
      z-index: 2;
    }
    .product-badge-flag {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(90deg, #0369A1, #0284C7);
      color: #FFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 16px;
      border-radius: 9999px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .tier-header {
      margin-bottom: 24px;
      text-align: center;
    }
    .tier-name {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .tier-target {
      font-size: 13px;
      color: var(--text-sub);
    }
    .tier-features {
      list-style: none;
      margin: 28px 0;
      display: flex;
      flex-direction: column;
      gap: 14px;
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
    }
    .tier-features li {
      font-size: 14px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .tier-check {
      color: var(--success);
      font-weight: 800;
    }

    /* 板块五：业务场景演示 */
    .solutions-tabs-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .solutions-nav {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      background: #F8FAFC;
      border-bottom: 1px solid var(--border);
    }
    .solution-tab-btn {
      padding: 20px 16px;
      text-align: center;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-muted);
      cursor: pointer;
      border-bottom: 2px solid transparent;
      transition: all 0.2s ease;
      background: transparent;
      border-left: none;
      border-right: none;
      border-top: none;
    }
    .solution-tab-btn.active {
      background: #FFFFFF;
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
    }
    .solution-tab-content {
      padding: 48px 40px;
    }
    .scenario-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .scenario-text h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .scenario-text p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .scenario-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 28px;
    }
    .scenario-points li {
      font-size: 14px;
      color: var(--text-muted);
      display: flex;
      gap: 8px;
      align-items: baseline;
    }
    .scenario-points strong {
      color: var(--text-main);
    }
    .scenario-image {
      border-radius: var(--radius-sm);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
    }
    .scenario-image img {
      width: 100%;
      height: 320px;
      object-fit: cover;
    }

    /* 板块六：对比差异矩阵 */
    .comparison-table-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow-md);
      overflow-x: auto;
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comp-table th, .comp-table td {
      padding: 20px 24px;
      border-bottom: 1px solid var(--border);
      font-size: 14px;
    }
    .comp-table th {
      background: #F8FAFC;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .comp-table th.highlight-col {
      background: #F0F9FF;
      color: var(--primary);
    }
    .comp-table td.highlight-col {
      background: rgba(240, 249, 255, 0.4);
      font-weight: 600;
      color: var(--text-main);
    }
    .tag-diff-bad {
      color: #DC2626;
      background: #FEE2E2;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
    }
    .tag-diff-good {
      color: var(--success);
      background: #D1FAE5;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
    }

    /* 板块七：架构解析区 */
    .architecture-layers {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 48px;
    }
    .layer-card {
      background: var(--dark-surface);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius);
      padding: 36px 28px;
      position: relative;
    }
    .layer-step {
      font-size: 12px;
      font-weight: 800;
      color: #38BDF8;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .layer-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 14px;
    }
    .layer-card p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 板块八：量化指标条 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 44px 36px;
      box-shadow: var(--shadow-sm);
    }
    .metric-cell {
      text-align: center;
      border-right: 1px solid var(--border-light);
      padding: 0 12px;
    }
    .metric-cell:last-child {
      border-right: none;
    }
    .metric-num {
      font-size: 44px;
      font-weight: 850;
      line-height: 1;
      color: var(--primary);
      margin-bottom: 10px;
      font-feature-settings: "tnum";
    }
    .metric-num span {
      font-size: 22px;
      font-weight: 700;
    }
    .metric-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .metric-desc {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 板块九：行业案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .case-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .case-content {
      padding: 28px 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .case-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 10px;
    }
    .case-content h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .case-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .case-result-badge {
      background: #ECFDF5;
      color: #065F46;
      border: 1px solid #A7F3D0;
      padding: 8px 12px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
    }

    /* 板块十：客户证言背书 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-stars {
      color: #F59E0B;
      font-size: 16px;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }
    .testimonial-quote {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-light);
      padding-top: 18px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .author-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-title {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 板块十一：财税资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .news-card img {
      width: 100%;
      height: 190px;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .news-meta {
      font-size: 12px;
      color: var(--text-sub);
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
    }
    .news-body h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex: 1;
    }
    .news-link {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块十二：FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }
    .faq-question h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
    }
    .faq-icon {
      font-size: 20px;
      color: var(--text-sub);
      transition: transform 0.25s ease;
      font-weight: 300;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      background: #FAFCFF;
    }
    .faq-item.active .faq-answer {
      max-height: 280px;
      padding: 0 24px 22px 24px;
    }
    .faq-answer p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px dashed var(--border);
      padding-top: 14px;
    }

    /* 板块十三：合规安全保障条 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 24px 20px;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .guarantee-icon {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 14px;
      font-weight: 700;
    }
    .guarantee-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .guarantee-card p {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 板块十四：沉浸转化 CTA */
    .cta-card {
      background: linear-gradient(135deg, #075985 0%, #0369A1 100%);
      border-radius: var(--radius);
      padding: 64px 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
    }
    .cta-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .cta-info h2 {
      font-size: 36px;
      font-weight: 850;
      line-height: 1.3;
      margin-bottom: 18px;
    }
    .cta-info p {
      font-size: 16px;
      color: #E0F2FE;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .cta-features-inline {
      display: flex;
      gap: 20px;
      font-size: 13px;
      color: #BAE6FD;
    }
    .cta-form {
      background: #FFFFFF;
      border-radius: var(--radius-sm);
      padding: 32px 28px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      color: var(--text-main);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid var(--border);
      border-radius: 6px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease;
    }
    .form-control:focus {
      border-color: var(--primary);
    }
    .form-submit-btn {
      width: 100%;
      height: 48px;
      background: var(--primary);
      color: #FFF;
      font-size: 15px;
      font-weight: 700;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      transition: background-color 0.2s ease;
    }
    .form-submit-btn:hover {
      background: var(--primary-hover);
    }
    .form-privacy-note {
      font-size: 12px;
      color: var(--text-sub);
      text-align: center;
      margin-top: 10px;
    }

    /* 底部固定转化条 */
    .floating-cta-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(15, 23, 42, 0.94);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding: 12px 0;
      z-index: 999;
      transform: translateY(100%);
      transition: transform 0.3s ease;
    }
    .floating-cta-bar.show {
      transform: translateY(0);
    }
    .floating-cta-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #FFF;
    }
    .floating-cta-text {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .floating-cta-title {
      font-size: 15px;
      font-weight: 700;
      color: #F8FAFC;
    }
    .floating-cta-tel {
      font-size: 14px;
      color: #38BDF8;
      font-weight: 600;
    }
    .btn-float-action {
      background: #0284C7;
      color: #FFF;
      padding: 8px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 6px;
      border: none;
      cursor: pointer;
    }
    .btn-float-action:hover {
      background: #0369A1;
    }

    /* 页脚 */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      padding: 72px 0 32px 0;
      border-top: 1px solid #1E293B;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand h4 {
      font-size: 20px;
      font-weight: 800;
      color: #F8FAFC;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.8;
      color: #64748B;
      margin-bottom: 18px;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 13px;
    }
    .footer-links a:hover {
      color: #38BDF8;
    }
    .footer-contact-item {
      display: flex;
      gap: 8px;
      font-size: 13px;
      margin-bottom: 10px;
      color: #94A3B8;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: #64748B;
      flex-wrap: wrap;
      gap: 14px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .overview-grid, .scenario-grid, .cta-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .features-grid, .products-grid, .architecture-layers, .cases-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .product-tier-card.highlight {
        transform: none;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu, .nav-actions {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
        padding: 28px 20px;
      }
      .metric-cell {
        border-right: none;
      }
      .features-grid, .products-grid, .architecture-layers, .cases-grid, .testimonials-grid, .news-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .solutions-nav {
        grid-template-columns: repeat(2, 1fr);
      }
      .cta-card {
        padding: 36px 20px;
      }
      .floating-cta-text {
        display: none;
      }
      .floating-cta-inner {
        justify-content: center;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }