/* roulang page: index */
:root {
      --primary: #0A2540;
      --primary-light: #16385C;
      --accent: #00D4B2;
      --accent-hover: #00B89A;
      --accent-warm: #FF6B4A;
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #06121E;
      --text-title: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --text-light: #E2E8F0;
      --border-color: rgba(15, 23, 42, 0.08);
      --border-dark: rgba(255, 255, 255, 0.12);
      --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.04);
      --shadow-md: 0 8px 30px rgba(10, 37, 64, 0.06);
      --shadow-lg: 0 16px 40px rgba(10, 37, 64, 0.1);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 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;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

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

    input, button, textarea {
      font-family: inherit;
      border: none;
      outline: none;
    }

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

    /* 顶部导航系统 */
    .top-bar {
      background: #F1F5F9;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.825rem;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-links span {
      margin-left: 20px;
    }
    .top-bar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-weight: 500;
    }
    .top-bar-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      background: var(--accent);
      border-radius: 50%;
    }

    .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(--border-color);
      transition: var(--transition);
    }
    .site-header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.35rem;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: var(--accent);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      font-size: 0.925rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background: var(--accent);
      color: var(--primary);
      box-shadow: 0 4px 14px rgba(0, 212, 178, 0.25);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
    }
    .btn-dark {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1px solid var(--border-color);
      color: var(--primary);
      background: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: #F8FAFC;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--primary);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 板块通用规范 */
    .section-py {
      padding: 88px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 56px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--accent);
      background: rgba(0, 212, 178, 0.1);
      padding: 4px 12px;
      border-radius: 20px;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }
    .section-tag.dark {
      background: rgba(0, 212, 178, 0.2);
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      color: var(--text-title);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 01. 首屏 Hero */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #06121E 0%, #0A2540 100%), url('/assets/images/e81e842e921ac203.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      color: #FFFFFF;
      padding: 96px 0 108px;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #FFFFFF;
      letter-spacing: -0.8px;
    }
    .hero-content h1 span {
      color: var(--accent);
    }
    .hero-lead {
      font-size: 1.1rem;
      color: var(--text-light);
      margin-bottom: 36px;
      line-height: 1.8;
    }
    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-badge-item {
      display: flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid var(--border-dark);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      color: #F1F5F9;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* Hero 右侧留资与资料封面卡片 */
    .whitepaper-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 32px;
      backdrop-filter: blur(16px);
      box-shadow: 0 24px 50px rgba(0, 0, 0, 0.4);
    }
    .whitepaper-header {
      display: flex;
      gap: 20px;
      margin-bottom: 24px;
      align-items: center;
    }
    .whitepaper-thumb {
      width: 90px;
      height: 120px;
      border-radius: var(--radius-sm);
      object-fit: cover;
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    .whitepaper-info h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 8px;
    }
    .whitepaper-info p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .toc-list {
      list-style: none;
      margin-bottom: 24px;
      border-top: 1px dashed rgba(255, 255, 255, 0.15);
      padding-top: 16px;
    }
    .toc-item {
      font-size: 0.85rem;
      color: #CBD5E1;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .toc-item::before {
      content: "•";
      color: var(--accent);
      font-size: 1.2rem;
    }
    .lead-form input {
      width: 100%;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-size: 0.9rem;
      margin-bottom: 12px;
      transition: var(--transition);
    }
    .lead-form input:focus {
      background: rgba(255, 255, 255, 0.12);
      border-color: var(--accent);
    }
    .lead-form .btn {
      width: 100%;
    }

    /* 02. 品牌与学术产品介绍区 */
    .overview-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 56px;
      align-items: center;
    }
    .overview-text h3 {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 20px;
    }
    .overview-text p {
      margin-bottom: 20px;
      color: var(--text-body);
      font-size: 1rem;
    }
    .spec-table-box {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.9rem;
    }
    .spec-table th, .spec-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
    }
    .spec-table th {
      background: #F8FAFC;
      color: var(--text-title);
      font-weight: 600;
      width: 35%;
    }
    .spec-table td {
      color: var(--text-body);
    }

    /* 03. 核心优势矩阵 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 212, 178, 0.4);
    }
    .feature-num {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 16px;
      display: inline-block;
    }
    .feature-card h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }
    .feature-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 04. 热门产品体系 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .product-tier-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .product-tier-card.featured {
      border: 2px solid var(--accent);
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
    }
    .product-badge-top {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent);
      color: var(--primary);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 16px;
      border-radius: 20px;
      letter-spacing: 0.5px;
    }
    .product-tier-card h4 {
      font-size: 1.45rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }
    .product-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 48px;
    }
    .product-specs {
      list-style: none;
      margin-bottom: 32px;
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      flex-grow: 1;
    }
    .product-specs li {
      font-size: 0.875rem;
      color: var(--text-body);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-specs li::before {
      content: "✓";
      color: var(--accent);
      font-weight: 800;
    }

    /* 05. 理念区 (深色反差) */
    .concept-section {
      background: var(--bg-dark);
      color: #FFFFFF;
      padding: 96px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .concept-section .section-title {
      color: #FFFFFF;
    }
    .concept-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      margin-top: 48px;
    }
    .concept-card {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      transition: var(--transition);
    }
    .concept-card:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: var(--accent);
    }
    .concept-card h4 {
      font-size: 1.25rem;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .concept-card p {
      font-size: 0.925rem;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 06. 场景演示区 */
    .scenario-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 64px;
    }
    .scenario-grid:last-child {
      margin-bottom: 0;
    }
    .scenario-grid.reverse {
      direction: rtl;
    }
    .scenario-grid.reverse > * {
      direction: ltr;
    }
    .scenario-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .scenario-content h4 {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 16px;
    }
    .scenario-content p {
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .scenario-points {
      list-style: none;
    }
    .scenario-points li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 10px;
      font-size: 0.925rem;
      color: var(--text-body);
    }
    .scenario-points li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 9px;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
    }

    /* 07. 标杆课题组科研故事 */
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .story-img {
      height: 240px;
      object-fit: cover;
      width: 100%;
    }
    .story-body {
      padding: 32px;
    }
    .story-meta {
      font-size: 0.85rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .story-body h4 {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }
    .story-body p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 08. 核心科研效能数据统计条 */
    .metrics-bar {
      background: var(--primary);
      color: #FFFFFF;
      padding: 64px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-value {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: monospace, sans-serif;
    }
    .metric-label {
      font-size: 0.95rem;
      color: #E2E8F0;
      font-weight: 500;
    }

    /* 09. 真实学者与导师评价流 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .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-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-title);
    }
    .author-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 10. 全维对比表格 */
    .comparison-table-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
    }
    .comp-table th, .comp-table td {
      padding: 18px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.925rem;
    }
    .comp-table th {
      background: #F8FAFC;
      font-weight: 700;
      color: var(--text-title);
    }
    .comp-table th.highlight, .comp-table td.highlight {
      background: rgba(0, 212, 178, 0.05);
      color: var(--primary);
      font-weight: 600;
    }
    .comp-badge-good {
      display: inline-block;
      padding: 3px 8px;
      background: #DCFCE7;
      color: #15803D;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    .comp-badge-bad {
      display: inline-block;
      padding: 3px 8px;
      background: #FEE2E2;
      color: #B91C1C;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* 11. 学术动态与前沿资讯 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .insight-card:hover {
      border-color: var(--accent);
      transform: translateY(-3px);
    }
    .insight-tag {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--primary);
      background: #E2E8F0;
      padding: 2px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .insight-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .insight-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .insight-link {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--accent-hover);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 12. 安全合规保障条 */
    .compliance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .compliance-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
    }
    .compliance-icon {
      width: 48px;
      height: 48px;
      background: rgba(10, 37, 64, 0.05);
      border-radius: 50%;
      margin: 0 auto 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--primary);
    }
    .compliance-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 8px;
    }
    .compliance-item p {
      font-size: 0.825rem;
      color: var(--text-muted);
    }

    /* 13. FAQ 手风琴 */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: rgba(0, 212, 178, 0.5);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-title);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-toggle-icon {
      font-size: 1.25rem;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
      color: var(--accent);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #FAFCFE;
    }
    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 14. 转化 CTA */
    .cta-section {
      background: linear-gradient(135deg, #0A2540 0%, #16385C 100%);
      color: #FFFFFF;
      text-align: center;
      padding: 88px 0;
    }
    .cta-box {
      max-width: 640px;
      margin: 0 auto;
    }
    .cta-box h3 {
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .cta-box p {
      font-size: 1.05rem;
      color: #CBD5E1;
      margin-bottom: 32px;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      max-width: 500px;
      margin: 0 auto 16px;
    }
    .cta-form input {
      flex-grow: 1;
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
    }
    .cta-form .btn {
      white-space: nowrap;
      padding: 14px 28px;
    }
    .cta-hint {
      font-size: 0.825rem;
      color: #94A3B8;
    }

    /* 页脚 */
    .site-footer {
      background: #06121E;
      color: #94A3B8;
      padding: 72px 0 32px;
      font-size: 0.875rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      color: #FFFFFF;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      font-size: 0.95rem;
      color: #FFFFFF;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8rem;
    }

    /* 底部悬浮条 */
    .fixed-bar {
      position: fixed;
      bottom: -80px;
      left: 0;
      width: 100%;
      background: rgba(10, 37, 64, 0.95);
      backdrop-filter: blur(8px);
      color: #FFFFFF;
      padding: 12px 0;
      z-index: 99;
      box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
      transition: bottom 0.3s ease-in-out;
    }
    .fixed-bar.visible {
      bottom: 0;
    }
    .fixed-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .fixed-bar-title {
      font-weight: 600;
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .fixed-bar-badge {
      background: var(--accent);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .features-grid, .products-grid, .concept-grid, .insights-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .compliance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
      }
      .main-nav.open {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-content h1 {
        font-size: 2.15rem;
      }
      .features-grid, .products-grid, .concept-grid, .insights-grid, .testimonials-grid, .stories-grid {
        grid-template-columns: 1fr;
      }
      .overview-grid, .scenario-grid {
        grid-template-columns: 1fr;
      }
      .scenario-grid.reverse {
        direction: ltr;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .fixed-bar-title {
        display: none;
      }
      .fixed-bar .container {
        justify-content: center;
      }
    }

    @media (max-width: 480px) {
      .section-title {
        font-size: 1.75rem;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .compliance-grid {
        grid-template-columns: 1fr;
      }
    }