/* roulang page: index */
/* CSS 设计变量与主题规范 */
    :root {
      --color-primary: #0F2A4A;
      --color-primary-light: #1A3E6D;
      --color-accent: #10B981;
      --color-accent-hover: #059669;
      --color-amber: #D97706;
      --color-dark: #0A1626;
      --color-dark-surface: #132238;
      --color-bg-light: #F8FAFC;
      --color-bg-alt: #F1F5F9;
      --color-text-main: #1E293B;
      --color-text-muted: #64748B;
      --color-border: #E2E8F0;
      --color-border-dark: #263852;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 6px rgba(15, 42, 74, 0.04);
      --shadow-md: 0 8px 24px -4px rgba(15, 42, 74, 0.08);
      --shadow-lg: 0 16px 36px -6px rgba(15, 42, 74, 0.12);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--color-text-main);
      background-color: var(--color-bg-light);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .tabular-num {
      font-variant-numeric: tabular-nums;
      font-family: "SF Pro Display", -apple-system, "Segoe UI", Roboto, sans-serif;
    }

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

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航系统 */
    .top-utility-bar {
      background-color: var(--color-dark);
      color: #94A3B8;
      font-size: 13px;
      border-bottom: 1px solid var(--color-border-dark);
      padding: 8px 0;
    }
    .top-utility-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-utility-left, .top-utility-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .top-utility-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #38BDF8;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
      transition: var(--transition);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .site-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      color: var(--color-primary);
      letter-spacing: -0.5px;
    }
    .brand-badge {
      font-size: 11px;
      font-weight: 600;
      background: #E0F2FE;
      color: #0284C7;
      padding: 2px 8px;
      border-radius: 4px;
      letter-spacing: 0.5px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--color-text-main);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--color-primary);
    }
    .nav-link::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--color-accent);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
      min-height: 44px;
    }
    .btn-primary {
      background: var(--color-accent);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    }
    .btn-primary:hover {
      background: var(--color-accent-hover);
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
    }
    .btn-outline {
      border-color: var(--color-primary);
      color: var(--color-primary);
      background: transparent;
    }
    .btn-outline:hover {
      background: var(--color-primary);
      color: #FFFFFF;
    }
    .btn-dark {
      background: var(--color-primary);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background: var(--color-primary-light);
    }

    /* 移动端汉堡按钮 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--color-primary);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 通用Section排版规范 */
    .section-wrap {
      padding: 88px 0;
      position: relative;
    }
    .section-wrap.bg-white {
      background-color: #FFFFFF;
    }
    .section-wrap.bg-alt {
      background-color: var(--color-bg-alt);
    }
    .section-wrap.bg-dark {
      background-color: var(--color-dark);
      color: #FFFFFF;
    }
    .section-header {
      margin-bottom: 56px;
      text-align: center;
    }
    .section-header.text-left {
      text-align: left;
    }
    .section-kicker {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--color-accent);
      background: rgba(16, 185, 129, 0.1);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .bg-dark .section-title {
      color: #F8FAFC;
    }
    .section-desc {
      font-size: 16px;
      color: var(--color-text-muted);
      max-width: 780px;
      margin: 0 auto;
      line-height: 1.7;
    }
    .bg-dark .section-desc {
      color: #94A3B8;
    }

    /* 1. 首屏轮播与价值主张区 (工业参数首屏) */
    #hero {
      position: relative;
      background: linear-gradient(135deg, #0A1626 0%, #0F2A4A 60%, #16365C 100%);
      color: #FFFFFF;
      padding: 96px 0 80px;
      overflow: hidden;
      border-bottom: 1px solid var(--color-border-dark);
    }
    .hero-bg-overlay {
      position: absolute;
      inset: 0;
      opacity: 0.12;
      background-image: url('/assets/images/8aa784dea2918cb9.webp');
      background-size: cover;
      background-position: center;
      mix-blend-mode: overlay;
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-content h1 {
      font-size: 44px;
      line-height: 1.2;
      font-weight: 800;
      letter-spacing: -1px;
      margin-bottom: 22px;
    }
    .hero-content h1 span {
      color: var(--color-accent);
    }
    .hero-intro {
      font-size: 17px;
      color: #CBD5E1;
      margin-bottom: 32px;
      line-height: 1.75;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    /* 工业参数网格条 */
    .hero-spec-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 20px;
      border-radius: var(--radius-md);
    }
    .spec-item .spec-label {
      font-size: 13px;
      color: #94A3B8;
      display: block;
      margin-bottom: 4px;
    }
    .spec-item .spec-val {
      font-size: 24px;
      font-weight: 700;
      color: #38BDF8;
    }
    .hero-card-inquiry {
      background: #FFFFFF;
      color: var(--color-text-main);
      padding: 36px;
      border-radius: var(--radius-lg);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
      border: 1px solid rgba(255, 255, 255, 0.8);
    }
    .hero-card-inquiry h3 {
      font-size: 22px;
      color: var(--color-primary);
      margin-bottom: 8px;
    }
    .hero-card-inquiry p {
      font-size: 14px;
      color: var(--color-text-muted);
      margin-bottom: 24px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: #334155;
    }
    .form-input {
      width: 100%;
      height: 44px;
      padding: 8px 14px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      transition: var(--transition);
      background: #F8FAFC;
    }
    .form-input:focus {
      outline: none;
      border-color: var(--color-accent);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    /* 2. 品牌底蕴与资质介绍区 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 56px;
      align-items: center;
    }
    .intro-text-box h3 {
      font-size: 26px;
      color: var(--color-primary);
      margin-bottom: 18px;
    }
    .intro-text-box p {
      font-size: 15px;
      color: #475569;
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .trust-credentials {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .credential-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      padding: 16px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }
    .credential-badge {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: #ECFDF5;
      color: var(--color-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }
    .credential-card h4 {
      font-size: 14px;
      color: var(--color-primary);
      margin-bottom: 4px;
    }
    .credential-card p {
      font-size: 12px;
      color: var(--color-text-muted);
      margin: 0;
      line-height: 1.5;
    }

    /* 3. 核心优势矩阵 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      padding: 32px 28px;
      border-radius: var(--radius-md);
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .adv-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: #EFF6FF;
      color: #1D4ED8;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 20px;
      margin-bottom: 20px;
    }
    .adv-card h4 {
      font-size: 19px;
      color: var(--color-primary);
      margin-bottom: 12px;
    }
    .adv-card p {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.7;
    }

    /* 4. 产品功能模块 */
    .product-modules-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .module-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .module-card:hover {
      box-shadow: var(--shadow-lg);
      border-color: #93C5FD;
    }
    .module-img-wrap {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .module-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .module-card:hover .module-img-wrap img {
      transform: scale(1.05);
    }
    .module-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .module-pill {
      align-self: flex-start;
      font-size: 12px;
      font-weight: 600;
      color: #0369A1;
      background: #E0F2FE;
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 14px;
    }
    .module-body h4 {
      font-size: 20px;
      color: var(--color-primary);
      margin-bottom: 12px;
    }
    .module-body p {
      font-size: 14px;
      color: var(--color-text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .module-feature-list {
      list-style: none;
      margin-top: auto;
      padding-top: 16px;
      border-top: 1px solid var(--color-border);
    }
    .module-feature-list li {
      font-size: 13px;
      color: #334155;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .module-feature-list li::before {
      content: "✓";
      color: var(--color-accent);
      font-weight: bold;
    }

    /* 5. 数字化使用场景 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scenario-item {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      border-top: 4px solid var(--color-primary);
      transition: var(--transition);
    }
    .scenario-item:hover {
      border-top-color: var(--color-accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .scenario-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .scenario-num {
      font-size: 14px;
      font-weight: 800;
      color: var(--color-accent);
      background: #ECFDF5;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .scenario-item h4 {
      font-size: 18px;
      color: var(--color-primary);
    }
    .scenario-item p {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.65;
      margin-bottom: 14px;
    }
    .scenario-highlight {
      font-size: 12px;
      color: #0369A1;
      background: #F0F9FF;
      padding: 8px 12px;
      border-radius: 4px;
    }

    /* 6. 系统界面与功能演示台 */
    .showcase-container {
      background: #0F2A4A;
      border-radius: var(--radius-lg);
      padding: 40px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      border: 1px solid #234875;
    }
    .showcase-topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #1E3E66;
      padding-bottom: 20px;
      margin-bottom: 28px;
    }
    .window-dots {
      display: flex;
      gap: 8px;
    }
    .window-dots span {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: #334155;
    }
    .window-dots span:nth-child(1) { background: #EF4444; }
    .window-dots span:nth-child(2) { background: #F59E0B; }
    .window-dots span:nth-child(3) { background: #10B981; }
    .showcase-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }
    .dashboard-mockup {
      background: #132238;
      border: 1px solid #263852;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    }
    .showcase-annotations {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .annotation-item {
      border-left: 3px solid var(--color-accent);
      padding-left: 16px;
    }
    .annotation-item h5 {
      font-size: 16px;
      color: #F8FAFC;
      margin-bottom: 6px;
    }
    .annotation-item p {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 7. 深色理念与财税风控合规保障 */
    .compliance-features {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 48px;
    }
    .compliance-card {
      background: var(--color-dark-surface);
      border: 1px solid var(--color-border-dark);
      padding: 30px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .compliance-card h4 {
      font-size: 18px;
      color: #F8FAFC;
      margin-bottom: 12px;
    }
    .compliance-card p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 8. 标杆客户案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-img-box {
      height: 220px;
      position: relative;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-tag {
      position: absolute;
      top: 16px;
      left: 16px;
      background: rgba(15, 42, 74, 0.85);
      color: #FFFFFF;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      backdrop-filter: blur(4px);
    }
    .case-content {
      padding: 32px;
    }
    .case-content h4 {
      font-size: 21px;
      color: var(--color-primary);
      margin-bottom: 20px;
    }
    .case-step-flow {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 24px;
    }
    .flow-step {
      font-size: 14px;
      line-height: 1.6;
    }
    .flow-step strong {
      display: inline-block;
      min-width: 72px;
      color: var(--color-primary);
    }
    .flow-step span {
      color: var(--color-text-muted);
    }
    .case-metrics-tag {
      background: #ECFDF5;
      border: 1px solid #A7F3D0;
      color: #065F46;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
    }

    /* 9. 关键运营数据条 */
    #metrics {
      background: #FFFFFF;
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
      padding: 48px 0;
    }
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-col {
      position: relative;
    }
    .metric-col:not(:last-child)::after {
      content: "";
      position: absolute;
      right: 0;
      top: 15%;
      height: 70%;
      width: 1px;
      background: var(--color-border);
    }
    .metric-val {
      font-size: 42px;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1;
      margin-bottom: 8px;
    }
    .metric-val em {
      font-size: 22px;
      font-style: normal;
      color: var(--color-accent);
      margin-left: 2px;
    }
    .metric-txt {
      font-size: 14px;
      color: var(--color-text-muted);
      font-weight: 500;
    }

    /* 10. 用户真实口碑与评价墙 */
    .reviews-masonry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-quote {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .review-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--color-border);
      padding-top: 16px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }
    .reviewer-info h5 {
      font-size: 15px;
      color: var(--color-primary);
      margin-bottom: 2px;
    }
    .reviewer-info p {
      font-size: 12px;
      color: var(--color-text-muted);
    }

    /* 11. 方案套餐与价格梯度 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: stretch;
    }
    .price-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .price-card.featured {
      border-color: var(--color-accent);
      box-shadow: var(--shadow-lg);
      transform: translateY(-8px);
    }
    .featured-badge {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--color-accent);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
      letter-spacing: 0.5px;
    }
    .price-card h4 {
      font-size: 22px;
      color: var(--color-primary);
      margin-bottom: 8px;
    }
    .price-desc {
      font-size: 13px;
      color: var(--color-text-muted);
      margin-bottom: 24px;
      min-height: 40px;
    }
    .price-figure {
      margin-bottom: 24px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--color-border);
    }
    .price-val {
      font-size: 38px;
      font-weight: 800;
      color: var(--color-primary);
    }
    .price-unit {
      font-size: 14px;
      color: var(--color-text-muted);
      font-weight: normal;
    }
    .price-card-features {
      list-style: none;
      margin-bottom: 32px;
      flex: 1;
    }
    .price-card-features li {
      font-size: 14px;
      color: #334155;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .price-card-features li::before {
      content: "✓";
      color: var(--color-accent);
      font-weight: bold;
    }

    /* 12. 财税法规与实务资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-img img {
      transform: scale(1.04);
    }
    .news-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .news-date {
      font-size: 12px;
      color: #94A3B8;
      margin-bottom: 8px;
    }
    .news-content h4 {
      font-size: 17px;
      color: var(--color-primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-content p {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-link {
      margin-top: auto;
      font-size: 13px;
      font-weight: 600;
      color: #0284C7;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 13. 常见问题解答手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item details summary {
      padding: 22px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--color-primary);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-item details summary::-webkit-details-marker {
      display: none;
    }
    .faq-item details summary::after {
      content: "+";
      font-size: 20px;
      font-weight: normal;
      color: var(--color-text-muted);
      transition: transform 0.2s ease;
    }
    .faq-item details[open] summary::after {
      transform: rotate(45deg);
      color: var(--color-accent);
    }
    .faq-item details[open] {
      border-color: #CBD5E1;
    }
    .faq-answer {
      padding: 0 24px 22px;
      font-size: 14px;
      color: #475569;
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

    /* 全幅转化收拢区 (Bottom CTA) */
    #cta {
      background: linear-gradient(135deg, #0F2A4A 0%, #0A1626 100%);
      color: #FFFFFF;
      padding: 88px 0;
      border-top: 1px solid var(--color-border-dark);
    }
    .cta-inner-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 56px;
      align-items: center;
    }
    .cta-text-side h2 {
      font-size: 36px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
    }
    .cta-text-side p {
      font-size: 16px;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 28px;
    }
    .cta-trust-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .cta-trust-chips span {
      font-size: 13px;
      background: rgba(255, 255, 255, 0.08);
      padding: 6px 14px;
      border-radius: 20px;
      color: #94A3B8;
      border: 1px solid rgba(255, 255, 255, 0.12);
    }
    .cta-form-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px;
      color: var(--color-text-main);
      box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
    }
    .cta-form-box h3 {
      font-size: 20px;
      color: var(--color-primary);
      margin-bottom: 8px;
    }
    .cta-form-box p {
      font-size: 13px;
      color: var(--color-text-muted);
      margin-bottom: 22px;
    }

    /* 页脚与合规备案区 */
    .site-footer {
      background-color: #060E18;
      color: #94A3B8;
      font-size: 14px;
      padding: 72px 0 32px;
      border-top: 1px solid #1A283B;
    }
    .footer-top-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand-col .footer-brand-title {
      font-size: 22px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand-col p {
      font-size: 13px;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 20px;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }
    .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: #FFFFFF;
      padding-left: 4px;
    }
    .footer-contact-item {
      margin-bottom: 12px;
      font-size: 13px;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }
    .footer-contact-item span {
      color: #64748B;
      font-size: 12px;
    }
    .footer-contact-item strong {
      color: #E2E8F0;
    }
    .footer-bottom {
      border-top: 1px solid #172435;
      padding-top: 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
      color: #64748B;
    }
    .footer-bottom a {
      color: #64748B;
    }
    .footer-bottom a:hover {
      color: #94A3B8;
    }

    /* 移动端与响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .advantages-grid, .product-modules-grid, .pricing-grid, .news-grid, .reviews-masonry {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid, .cta-inner-grid, .showcase-grid {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
      }
    }
    @media (max-width: 768px) {
      .top-utility-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .hero-spec-grid {
        grid-template-columns: 1fr;
      }
      .advantages-grid, .product-modules-grid, .pricing-grid, .news-grid, .reviews-masonry, .cases-grid, .compliance-features {
        grid-template-columns: 1fr;
      }
      .scenarios-grid {
        grid-template-columns: 1fr;
      }
      .metrics-bar-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
      }
      .metric-col:not(:last-child)::after {
        display: none;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .section-wrap {
        padding: 60px 0;
      }
      .section-title {
        font-size: 26px;
      }
    }
    @media (max-width: 375px) {
      .metrics-bar-grid {
        grid-template-columns: 1fr;
      }
      .container {
        padding: 0 16px;
      }
      .hero-actions {
        flex-direction: column;
      }
      .btn {
        width: 100%;
      }
    }