/* roulang page: index */
:root {
      --primary: #0F4C81;
      --primary-hover: #0b3961;
      --primary-light: #EBF3FA;
      --accent: #10B981;
      --accent-dark: #059669;
      --dark-slate: #0F172A;
      --dark-card: #1E293B;
      --body-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #334155;
      --text-dark: #0F172A;
      --text-light: #64748B;
      --border-color: rgba(226, 232, 240, 0.85);
      --border-focus: #0F4C81;
      --radius-sm: 4px;
      --radius-md: 8px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 10px 25px -5px rgba(15, 23, 42, 0.06);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

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

    body {
      font-family: var(--font-stack);
      background-color: var(--body-bg);
      color: var(--text-main);
      line-height: 1.68;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

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

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

    /* 顶部微型栏 */
    .topbar {
      background-color: var(--dark-slate);
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      position: relative;
      z-index: 1001;
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 38px;
    }
    .topbar-left, .topbar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .topbar-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .topbar-badge {
      background: rgba(16, 185, 129, 0.2);
      color: #34D399;
      padding: 1px 6px;
      border-radius: 3px;
      font-size: 0.75rem;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.25s ease;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.02em;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo-mark {
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 800;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 24px;
    }
    .nav-link {
      font-size: 0.9375rem;
      color: var(--text-dark);
      font-weight: 500;
      position: relative;
      padding: 8px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-header {
      background: var(--primary);
      color: #ffffff;
      font-size: 0.875rem;
      font-weight: 600;
      padding: 9px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--primary);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn-header:hover {
      background: var(--primary-hover);
      border-color: var(--primary-hover);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-dark);
      margin: 5px 0;
      transition: all 0.3s ease;
    }

    /* 板块通用规范 */
    .section-block {
      padding: 88px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      letter-spacing: 0.05em;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.25;
      letter-spacing: -0.015em;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* 1. Hero 品牌旗舰展示 */
    .hero-section {
      position: relative;
      background: #0B132B;
      color: #FFFFFF;
      padding: 40px 0 0 0;
      overflow: hidden;
    }
    .hero-banner-wrap {
      position: relative;
      border-radius: var(--radius-md) var(--radius-md) 0 0;
      overflow: hidden;
      min-height: 520px;
      background-image: linear-gradient(to right, rgba(11, 19, 43, 0.95) 25%, rgba(15, 23, 42, 0.6) 100%), url('/assets/images/367b6ac7507908b2.png');
      background-size: cover;
      background-position: center;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 60px 48px 100px 48px;
    }
    .hero-main-content {
      max-width: 760px;
      z-index: 2;
    }
    .hero-h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.18;
      letter-spacing: -0.02em;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .hero-sub {
      font-size: 1.125rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 32px;
      max-width: 680px;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-hero-primary {
      background: var(--primary);
      color: #FFFFFF;
      padding: 14px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
      border: 1px solid rgba(255, 255, 255, 0.15);
      transition: background 0.2s ease, transform 0.2s ease;
    }
    .btn-hero-primary:hover {
      background: #145996;
      transform: translateY(-2px);
    }
    .btn-hero-secondary {
      background: rgba(255, 255, 255, 0.1);
      color: #FFFFFF;
      padding: 14px 24px;
      border-radius: var(--radius-sm);
      font-weight: 500;
      font-size: 1rem;
      border: 1px solid rgba(255, 255, 255, 0.2);
      backdrop-filter: blur(4px);
    }
    .btn-hero-secondary:hover {
      background: rgba(255, 255, 255, 0.18);
    }

    /* 系列导航条叠在大图下方 */
    .hero-stacked-strip {
      position: relative;
      margin-top: -50px;
      z-index: 10;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      box-shadow: 0 15px 35px -5px rgba(15, 23, 42, 0.1);
      border: 1px solid var(--border-color);
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      padding: 24px 32px;
    }
    .hero-strip-item {
      display: flex;
      align-items: center;
      gap: 16px;
      border-right: 1px solid var(--border-color);
      padding: 0 20px;
    }
    .hero-strip-item:first-child {
      padding-left: 0;
    }
    .hero-strip-item:last-child {
      border-right: none;
      padding-right: 0;
    }
    .strip-num {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
    }
    .strip-text-title {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-dark);
      margin-bottom: 2px;
    }
    .strip-text-desc {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* 2. 合集目录区 (Catalog) */
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .catalog-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .catalog-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(15, 76, 129, 0.25);
    }
    .catalog-meta {
      display: flex;
      justify-content: space-between;
      margin-bottom: 16px;
      font-size: 0.8125rem;
      color: var(--text-light);
    }
    .catalog-code {
      font-weight: 700;
      color: var(--primary);
    }
    .catalog-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
    }
    .catalog-desc {
      font-size: 0.9375rem;
      color: var(--text-light);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .catalog-features {
      list-style: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 16px;
      margin-bottom: 20px;
    }
    .catalog-features li {
      font-size: 0.875rem;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .catalog-features li::before {
      content: "•";
      color: var(--accent);
      font-size: 1.2rem;
    }
    .catalog-foot-link {
      color: var(--primary);
      font-weight: 600;
      font-size: 0.875rem;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 3. 相关推荐与方案矩阵 */
    .recommend-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .recommend-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .recommend-media {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .recommend-content h3 {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .recommend-badge-bar {
      display: flex;
      gap: 10px;
      margin-bottom: 20px;
    }
    .tech-pill {
      background: #F1F5F9;
      color: #475569;
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 3px;
      font-weight: 600;
    }

    /* 4. 深度深色理念与协同架构 (Dark-concept) */
    .dark-concept-section {
      background-color: var(--dark-slate);
      color: #F8FAFC;
    }
    .dark-concept-section .section-title {
      color: #FFFFFF;
    }
    .dark-concept-section .section-desc {
      color: #94A3B8;
    }
    .dark-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .dark-card {
      background: var(--dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 32px 28px;
    }
    .dark-card-step {
      color: #38BDF8;
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      margin-bottom: 8px;
    }
    .dark-card h4 {
      font-size: 1.25rem;
      color: #FFFFFF;
      margin-bottom: 14px;
      font-weight: 600;
    }
    .dark-card p {
      color: #94A3B8;
      font-size: 0.9375rem;
      line-height: 1.65;
    }

    /* 5. 核心优势六卡矩阵 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.2s ease;
    }
    .feature-item:hover {
      border-color: rgba(15, 76, 129, 0.3);
      box-shadow: var(--shadow-hover);
    }
    .feature-icon-box {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 18px;
    }
    .feature-item h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 10px;
    }
    .feature-item p {
      font-size: 0.9375rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* 6. 前后对比 (Before/After) */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .compare-card {
      border-radius: var(--radius-md);
      padding: 36px 32px;
      border: 1px solid var(--border-color);
    }
    .compare-before {
      background: #FFF7ED;
      border-color: #FED7AA;
    }
    .compare-after {
      background: #ECFDF5;
      border-color: #A7F3D0;
    }
    .compare-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    }
    .compare-title {
      font-size: 1.25rem;
      font-weight: 700;
    }
    .compare-before .compare-title { color: #C2410C; }
    .compare-after .compare-title { color: #047857; }
    .compare-badge {
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .compare-before .compare-badge { background: #FFEDD5; color: #9A3412; }
    .compare-after .compare-badge { background: #D1FAE5; color: #065F46; }
    .compare-list {
      list-style: none;
    }
    .compare-list li {
      margin-bottom: 16px;
      font-size: 0.9375rem;
      line-height: 1.6;
      display: flex;
      gap: 12px;
    }
    .compare-before li { color: #7C2D12; }
    .compare-after li { color: #064E3B; }
    .compare-icon {
      flex-shrink: 0;
      font-weight: 800;
    }

    /* 7. 方案实施流程 4步水平阶梯 */
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .workflow-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      position: relative;
    }
    .workflow-step {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .workflow-item h4 {
      font-size: 1.1rem;
      color: var(--text-dark);
      margin-bottom: 10px;
      font-weight: 600;
    }
    .workflow-item p {
      font-size: 0.875rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* 8. 关键数据统计条 (Stats) */
    .stats-section {
      background: #0F172A;
      color: #FFFFFF;
      padding: 60px 0;
    }
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stats-card {
      padding: 16px;
    }
    .stats-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: #38BDF8;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .stats-label {
      font-size: 1rem;
      font-weight: 600;
      color: #E2E8F0;
      margin-bottom: 4px;
    }
    .stats-subtext {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    /* 9. 真实案例与业务场景 */
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .story-img-wrap {
      height: 220px;
      overflow: hidden;
    }
    .story-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .story-tag {
      font-size: 0.75rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 8px;
    }
    .story-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
    }
    .story-text {
      font-size: 0.9375rem;
      color: var(--text-light);
      margin-bottom: 20px;
      line-height: 1.65;
    }
    .story-metrics {
      display: flex;
      gap: 20px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .story-metric-item span {
      display: block;
      font-size: 0.75rem;
      color: var(--text-light);
    }
    .story-metric-item strong {
      font-size: 1.15rem;
      color: var(--accent-dark);
      font-weight: 700;
    }

    /* 10. 资讯与行业实务 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.2s ease;
    }
    .news-card:hover {
      border-color: rgba(15, 76, 129, 0.3);
      box-shadow: var(--shadow-hover);
    }
    .news-date {
      font-size: 0.8125rem;
      color: #94A3B8;
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-summary {
      font-size: 0.875rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* 11. 专题索引与模块矩阵 */
    .topic-index-section {
      background: #F1F5F9;
    }
    .topic-index-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .topic-group {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .topic-group h5 {
      font-size: 1rem;
      color: var(--text-dark);
      margin-bottom: 14px;
      padding-bottom: 8px;
      border-bottom: 2px solid var(--primary-light);
      font-weight: 700;
    }
    .topic-list {
      list-style: none;
    }
    .topic-list li {
      font-size: 0.875rem;
      color: var(--text-light);
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
    }
    .topic-list li span:last-child {
      color: #94A3B8;
      font-size: 0.75rem;
    }

    /* 12. 用户口碑与标杆反馈 (Testimonials) */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      position: relative;
    }
    .quote-mark {
      font-size: 2.5rem;
      line-height: 1;
      color: #CBD5E1;
      margin-bottom: 12px;
      font-family: Georgia, serif;
    }
    .testimonial-quote {
      font-size: 0.9375rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 24px;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .author-avatar-ph {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
    }
    .author-name {
      font-weight: 600;
      font-size: 0.9375rem;
      color: var(--text-dark);
    }
    .author-role {
      font-size: 0.75rem;
      color: var(--text-light);
    }

    /* 13. FAQ 纯原生手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-item:hover {
      border-color: rgba(15, 76, 129, 0.4);
    }
    .faq-btn {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-dark);
    }
    .faq-btn:focus {
      outline: none;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #F8FAFC;
    }
    .faq-content p {
      padding: 0 24px 20px 24px;
      font-size: 0.9375rem;
      color: var(--text-light);
      line-height: 1.7;
    }
    .faq-item.active .faq-content {
      max-height: 250px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 14. 转化表单与底部收口 (CTA) */
    .cta-closing-section {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      color: #FFFFFF;
      padding: 90px 0;
    }
    .cta-inner-box {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .cta-inner-box h2 {
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .cta-inner-box p {
      color: #CBD5E1;
      font-size: 1.05rem;
      margin-bottom: 36px;
    }
    .lead-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr auto;
      gap: 12px;
      background: rgba(255, 255, 255, 0.06);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.12);
    }
    .form-input {
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(15, 23, 42, 0.6);
      color: #FFFFFF;
      font-size: 0.9375rem;
      width: 100%;
    }
    .form-input:focus {
      outline: none;
      border-color: #38BDF8;
      box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
    }
    .form-input::placeholder {
      color: #64748B;
    }
    .btn-submit-lead {
      background: var(--accent);
      color: #FFFFFF;
      font-weight: 600;
      padding: 12px 24px;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      white-space: nowrap;
      transition: background 0.2s ease;
    }
    .btn-submit-lead:hover {
      background: var(--accent-dark);
    }
    .form-privacy-note {
      font-size: 0.75rem;
      color: #94A3B8;
      margin-top: 14px;
    }

    /* 站点通用页脚 (Footer) */
    .site-footer {
      background: #090D16;
      color: #94A3B8;
      font-size: 0.875rem;
      padding: 70px 0 30px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    .footer-columns {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand-title {
      color: #FFFFFF;
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-desc {
      font-size: 0.875rem;
      line-height: 1.65;
      color: #64748B;
      max-width: 320px;
    }
    .footer-heading {
      color: #FFFFFF;
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .footer-nav-list {
      list-style: none;
    }
    .footer-nav-list li {
      margin-bottom: 10px;
    }
    .footer-nav-list a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 2.35rem; }
      .catalog-grid, .dark-grid, .features-grid, .workflow-grid, .news-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .topic-index-grid, .hero-stacked-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-strip-item {
        border-right: none;
        padding: 12px 0;
      }
      .lead-form-grid {
        grid-template-columns: 1fr 1fr;
      }
      .footer-columns {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .topbar { display: none; }
      .site-header { height: 64px; }
      .nav-container { height: 64px; }
      .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-hover);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
      }
      .nav-menu.open {
        transform: translateY(0);
      }
      .mobile-menu-toggle { display: block; }
      .hero-banner-wrap {
        padding: 40px 24px 80px 24px;
        min-height: 440px;
      }
      .hero-h1 { font-size: 1.85rem; }
      .catalog-grid, .dark-grid, .features-grid, .workflow-grid, .news-grid, .testimonials-grid, .stories-grid, .compare-container {
        grid-template-columns: 1fr;
      }
      .recommend-container {
        grid-template-columns: 1fr;
      }
      .stats-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .topic-index-grid, .hero-stacked-strip {
        grid-template-columns: 1fr;
      }
      .lead-form-grid {
        grid-template-columns: 1fr;
      }
      .footer-columns {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .section-block {
        padding: 60px 0;
      }
      .section-title {
        font-size: 1.65rem;
      }
    }