:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-card-alt: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #334155;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --neon-cyan: #00e5ff;
      --neon-purple: #8a2be2;
      --neon-pink: #ff007f;
      --neon-green: #00ff66;
      --brand-blue: #2563eb;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-neon: 0 0 20px rgba(0, 229, 255, 0.35), 0 0 35px rgba(138, 43, 226, 0.2);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-max: 1200px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 229, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(255, 0, 127, 0.04) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(138, 43, 226, 0.03) 0%, transparent 60%);
      background-attachment: fixed;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-box img.ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .brand-title-wrap {
      display: flex;
      flex-direction: column;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-tagline {
      font-size: 0.72rem;
      color: var(--text-light);
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.92rem;
      font-weight: 500;
      transition: var(--transition);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--brand-blue);
      background: rgba(0, 229, 255, 0.08);
    }

    .nav-cta-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-neon-primary {
      background: linear-gradient(135deg, #0284c7, #2563eb 45%, #7c3aed);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-neon-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5), 0 0 15px rgba(0, 229, 255, 0.4);
      color: #ffffff;
    }

    .btn-neon-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 1.5px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-neon-outline:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 14px rgba(0, 229, 255, 0.3);
      color: var(--brand-blue);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 区域通用样式 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 48px;
    }

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #0284c7;
      background: rgba(0, 229, 255, 0.12);
      border: 1px solid rgba(0, 229, 255, 0.3);
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 85px 0 65px;
      text-align: center;
      position: relative;
    }

    .hero-wrap {
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 20px;
      border-radius: 999px;
      background: #ffffff;
      border: 1px solid rgba(0, 229, 255, 0.4);
      box-shadow: 0 4px 15px rgba(0, 229, 255, 0.12);
      color: var(--text-main);
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--neon-cyan);
      box-shadow: 0 0 10px var(--neon-cyan);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%, 100% { transform: scale(1); opacity: 1; }
      50% { transform: scale(1.4); opacity: 0.6; }
    }

    .hero-h1 {
      font-size: 2.7rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-h1-glow {
      position: relative;
      display: inline-block;
      color: #1d4ed8;
      text-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
    }

    .hero-p {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.8;
      max-width: 760px;
      margin: 0 auto 36px;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-hero-official {
      padding: 14px 34px;
      font-size: 1.1rem;
      font-weight: 700;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, #06b6d4, #3b82f6 40%, #8b5cf6);
      color: #ffffff;
      box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4), 0 0 20px rgba(6, 182, 212, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.3);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: var(--transition);
    }

    .btn-hero-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 36px rgba(59, 130, 246, 0.5), 0 0 30px rgba(6, 182, 212, 0.6);
      color: #ffffff;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      position: relative;
      overflow: hidden;
      transition: var(--transition);
    }

    .stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
      opacity: 0.8;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md), 0 0 15px rgba(0, 229, 255, 0.15);
      border-color: rgba(0, 229, 255, 0.4);
    }

    .stat-number {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--text-main);
      display: block;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-5px);
      border-color: rgba(0, 229, 255, 0.6);
      box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06), 0 0 20px rgba(0, 229, 255, 0.2);
    }

    .service-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.1), rgba(138, 43, 226, 0.1));
      border: 1px solid rgba(0, 229, 255, 0.3);
      color: var(--brand-blue);
    }

    .service-card h3 {
      font-size: 1.22rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .service-card p {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .service-tag {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 999px;
      background: var(--bg-card-alt);
      color: var(--text-light);
      border: 1px solid var(--border-color);
    }

    /* 场景矩阵列表 */
    .scene-item-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: var(--transition);
    }

    .scene-item-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .scene-item-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scene-item-card h4::before {
      content: "";
      width: 6px;
      height: 16px;
      background: linear-gradient(180deg, var(--neon-cyan), var(--brand-blue));
      border-radius: 3px;
      display: inline-block;
    }

    .scene-item-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 图文展示与多媒体 */
    .image-showcase-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .image-showcase-box:hover {
      box-shadow: var(--shadow-md), 0 0 25px rgba(0, 229, 255, 0.2);
      border-color: rgba(0, 229, 255, 0.4);
    }

    .image-showcase-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .image-showcase-box:hover img {
      transform: scale(1.02);
    }

    .image-info {
      padding: 16px 20px;
    }

    .image-info h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 4px;
      color: var(--text-main);
    }

    .image-info p {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 模型矩阵徽章云 */
    .models-cloud-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .model-pills {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 20px;
    }

    .model-pill {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      border-radius: 8px;
      background: var(--bg-card-alt);
      color: var(--text-main);
      font-size: 0.85rem;
      font-weight: 600;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .model-pill:hover {
      background: #ffffff;
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 229, 255, 0.25);
      color: var(--brand-blue);
      transform: translateY(-2px);
    }

    /* 评测与对比表格 */
    .rating-banner {
      background: linear-gradient(135deg, rgba(2, 132, 199, 0.08), rgba(138, 43, 226, 0.08));
      border: 1px solid rgba(0, 229, 255, 0.3);
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 36px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-badge-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .rating-score {
      font-size: 3.5rem;
      font-weight: 900;
      color: #0284c7;
      line-height: 1;
      text-shadow: 0 0 15px rgba(0, 229, 255, 0.3);
    }

    .rating-meta h3 {
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .stars-icon {
      color: #f59e0b;
      font-size: 1.2rem;
      margin-bottom: 4px;
      letter-spacing: 2px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      border-radius: var(--radius-md);
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

    table.compare-table th, 
    table.compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    table.compare-table th {
      background: var(--bg-card-alt);
      color: var(--text-main);
      font-weight: 700;
    }

    table.compare-table tr:hover td {
      background: rgba(0, 229, 255, 0.03);
    }

    .highlight-col {
      background: rgba(37, 99, 235, 0.04);
      font-weight: 600;
      color: var(--brand-blue);
    }

    /* 流程与网络 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .timeline-step-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
      transition: var(--transition);
    }

    .timeline-step-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .step-badge {
      font-size: 0.8rem;
      font-weight: 800;
      color: var(--brand-blue);
      background: rgba(0, 229, 255, 0.15);
      display: inline-block;
      padding: 2px 10px;
      border-radius: 6px;
      margin-bottom: 12px;
    }

    .timeline-step-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .timeline-step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 客户评价网格 */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 229, 255, 0.4);
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
      font-size: 1rem;
    }

    .author-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 常见问题折叠面板 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(0, 229, 255, 0.5);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.3rem;
      font-weight: 400;
      color: var(--brand-blue);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-question::after {
      content: "−";
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease;
      background: #fbfcfe;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 280px;
      padding: 16px 24px 22px;
      border-top: 1px solid var(--border-color);
    }

    /* 表单与交互 */
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1.5px solid var(--border-color);
      background: #ffffff;
      color: var(--text-main);
      font-size: 0.95rem;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--neon-cyan);
      box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.2);
    }

    /* 文章列表 & 友情链接 */
    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-link-item a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 600;
      transition: var(--transition);
    }

    .article-link-item a:hover {
      border-color: var(--neon-cyan);
      color: var(--brand-blue);
      transform: translateX(4px);
      box-shadow: var(--shadow-sm);
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      padding: 20px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .friend-links-wrap a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      background: var(--bg-card-alt);
      transition: var(--transition);
      border: 1px solid transparent;
    }

    .friend-links-wrap a:hover {
      color: var(--brand-blue);
      background: #ffffff;
      border-color: var(--neon-cyan);
    }

    /* 浮动客服 */
    .floating-widget {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      font-size: 1.2rem;
      transition: var(--transition);
      text-decoration: none;
    }

    .float-btn:hover {
      border-color: var(--neon-cyan);
      color: var(--brand-blue);
      transform: scale(1.08);
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.4);
    }

    .qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      width: 170px;
      padding: 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      display: none;
      text-align: center;
    }

    .qr-popup img {
      width: 100%;
      height: auto;
      border-radius: 4px;
    }

    .qr-popup span {
      display: block;
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-top: 6px;
    }

    .float-qr-wrap:hover .qr-popup {
      display: block;
    }

    /* 页脚 */
    footer.site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      color: var(--text-muted);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-col ul li a:hover {
      color: var(--brand-blue);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.86rem;
      color: var(--text-light);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .grid-4, .hero-stats-grid, .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .grid-3, .grid-4, .grid-2, .hero-stats-grid, .timeline-steps {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 2.1rem;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }