:root {
      --primary-yellow: #FFC700;
      --primary-yellow-hover: #E5B200;
      --yellow-light: #FFFBEB;
      --yellow-border: #FDE68A;
      --yellow-glow: rgba(255, 199, 0, 0.25);
      --dark-title: #0F172A;
      --dark-body: #334155;
      --dark-muted: #64748B;
      --bg-page: #FBFBFA;
      --bg-card: #FFFFFF;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
      --shadow-yellow: 0 8px 20px rgba(255, 199, 0, 0.35);
      --container-max: 1200px;
      --transition: all 0.28s ease;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--dark-body);
      line-height: 1.65;
      font-size: 15px;
      overflow-x: hidden;
    }

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-box .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .brand-text {
      font-size: 20px;
      font-weight: 800;
      color: var(--dark-title);
      letter-spacing: -0.5px;
    }
    .brand-badge {
      display: inline-block;
      background-color: var(--primary-yellow);
      color: var(--dark-title);
      font-size: 11px;
      font-weight: 700;
      padding: 2px 6px;
      border-radius: 4px;
      margin-left: 6px;
    }

    .nav-links {
      display: flex;
      gap: 0;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links li a {
      display: block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 600;
      color: var(--dark-body);
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--dark-title);
      background-color: var(--yellow-light);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 700;
      border-radius: 50px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
      text-align: center;
    }
    .btn-yellow {
      background-color: var(--primary-yellow);
      color: var(--dark-title);
      box-shadow: 0 4px 12px var(--yellow-glow);
    }
    .btn-yellow:hover {
      background-color: var(--primary-yellow-hover);
      transform: translateY(-2px);
      box-shadow: var(--shadow-yellow);
    }
    .btn-dark {
      background-color: var(--dark-title);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background-color: #1E293B;
      transform: translateY(-2px);
    }
    .btn-outline {
      background-color: #FFFFFF;
      color: var(--dark-title);
      border: 1px solid var(--border-color);
    }
    .btn-outline:hover {
      border-color: var(--primary-yellow);
      background-color: var(--yellow-light);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .nav-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--dark-title);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 60px;
      background: linear-gradient(180deg, #FFFDF5 0%, #FAF9F5 100%);
      position: relative;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }
    .hero-bg-orb {
      position: absolute;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(255, 199, 0, 0.18) 0%, rgba(255, 199, 0, 0) 70%);
      top: -100px;
      right: -100px;
      pointer-events: none;
      border-radius: 50%;
    }
    .hero-bg-orb-2 {
      position: absolute;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(255, 230, 128, 0.22) 0%, rgba(255, 230, 128, 0) 70%);
      bottom: -100px;
      left: -100px;
      pointer-events: none;
      border-radius: 50%;
    }
    .hero-content {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: #FFFFFF;
      border: 1px solid var(--yellow-border);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      color: #92400E;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }
    .hero-tag-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary-yellow);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(255, 199, 0, 0.4);
    }
    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: var(--dark-title);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }
    .hero-subtitle {
      font-size: 17px;
      color: var(--dark-body);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 48px;
    }
    .btn-hero-primary {
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 800;
      background-color: var(--primary-yellow);
      color: var(--dark-title);
      border-radius: 50px;
      box-shadow: var(--shadow-yellow);
      border: 1px solid #E5B200;
    }
    .btn-hero-primary:hover {
      background-color: var(--primary-yellow-hover);
      transform: translateY(-3px);
    }
    .btn-hero-secondary {
      padding: 14px 30px;
      font-size: 16px;
      font-weight: 700;
      background-color: #FFFFFF;
      color: var(--dark-title);
      border: 1px solid var(--border-color);
      border-radius: 50px;
    }
    .btn-hero-secondary:hover {
      border-color: var(--primary-yellow);
      background-color: var(--yellow-light);
      transform: translateY(-3px);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }
    .hero-stat-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .hero-stat-card:hover {
      border-color: var(--primary-yellow);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-number {
      font-size: 28px;
      font-weight: 900;
      color: var(--dark-title);
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2px;
    }
    .stat-number span {
      color: #D97706;
      font-size: 20px;
    }
    .stat-desc {
      font-size: 13px;
      color: var(--dark-muted);
      font-weight: 600;
    }

    /* 通用章节样式 */
    .section {
      padding: 80px 0;
      position: relative;
    }
    .section-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }
    .section-tag {
      display: inline-block;
      background-color: var(--yellow-light);
      color: #92400E;
      font-size: 12px;
      font-weight: 800;
      padding: 4px 12px;
      border-radius: 20px;
      border: 1px solid var(--yellow-border);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark-title);
      line-height: 1.35;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      font-size: 15px;
      color: var(--dark-muted);
      line-height: 1.7;
    }

    /* 网格与卡片 */
    .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: 30px;
      align-items: center;
    }

    .feature-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }
    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background-color: transparent;
      transition: var(--transition);
    }
    .feature-card:hover {
      border-color: var(--yellow-border);
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .feature-card:hover::before {
      background-color: var(--primary-yellow);
    }
    .card-icon-badge {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      background-color: var(--yellow-light);
      border: 1px solid var(--yellow-border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 18px;
      color: #92400E;
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark-title);
      margin-bottom: 10px;
    }
    .card-desc {
      font-size: 14px;
      color: var(--dark-body);
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .card-link {
      font-size: 13px;
      font-weight: 700;
      color: #B45309;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .card-link:hover {
      color: #78350F;
    }

    /* 场景分类卡片标签 */
    .chips-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 10px;
    }
    .chip {
      background-color: #F1F5F9;
      color: var(--dark-body);
      font-size: 12px;
      padding: 3px 10px;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 多模型聚合标签墙 */
    .model-tags-container {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      margin-top: 24px;
    }
    .model-tags-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-title);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .model-tags-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .model-badge {
      background-color: var(--bg-page);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      color: var(--dark-title);
      transition: var(--transition);
    }
    .model-badge:hover {
      background-color: var(--primary-yellow);
      border-color: #E5B200;
      color: #000;
      transform: translateY(-2px);
    }

    /* 图片响应式包装 */
    .img-wrap {
      width: 100%;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background-color: #F8FAFC;
      box-shadow: var(--shadow-sm);
    }
    .img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .img-wrap:hover img {
      transform: scale(1.02);
    }

    /* 评测与对比表格 */
    .evaluation-header-box {
      background: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 100%);
      border: 1px solid var(--yellow-border);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
    }
    .score-badge-area {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .big-score {
      font-size: 46px;
      font-weight: 900;
      color: #92400E;
      line-height: 1;
    }
    .stars-text {
      font-size: 18px;
      color: #D97706;
      font-weight: 800;
      margin-bottom: 4px;
    }
    .score-label {
      font-size: 13px;
      color: #78350F;
      font-weight: 600;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background-color: #FFFFFF;
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .custom-table th {
      background-color: #F8FAFC;
      color: var(--dark-title);
      font-weight: 700;
    }
    .custom-table tr.highlight-row {
      background-color: #FFFDF5;
    }
    .custom-table tr:hover {
      background-color: #FBFBFA;
    }
    .tag-best {
      background-color: var(--primary-yellow);
      color: var(--dark-title);
      font-size: 11px;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 4px;
      margin-left: 6px;
    }
    .text-green {
      color: #15803D;
      font-weight: 700;
    }
    .text-gray {
      color: var(--dark-muted);
    }

    /* 流程卡片 */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .process-step-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .process-step-card:hover {
      border-color: var(--primary-yellow);
      transform: translateY(-4px);
    }
    .step-number {
      width: 36px;
      height: 36px;
      background-color: var(--primary-yellow);
      color: var(--dark-title);
      font-weight: 900;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      margin-bottom: 16px;
      box-shadow: 0 2px 8px var(--yellow-glow);
    }

    /* 评论卡片 */
    .review-card {
      background-color: #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 {
      border-color: var(--yellow-border);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      background-color: var(--yellow-light);
      color: #92400E;
      border: 1px solid var(--yellow-border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }
    .review-user-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-title);
    }
    .review-user-role {
      font-size: 12px;
      color: var(--dark-muted);
    }
    .review-stars {
      color: #F59E0B;
      font-size: 13px;
      margin-bottom: 8px;
    }
    .review-text {
      font-size: 13.5px;
      color: var(--dark-body);
      line-height: 1.6;
    }

    /* FAQ 手风琴折叠 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--primary-yellow);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      padding: 18px 20px;
      background: none;
      border: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      text-align: left;
      font-size: 15.5px;
      font-weight: 700;
      color: var(--dark-title);
      cursor: pointer;
    }
    .faq-icon {
      font-size: 18px;
      font-weight: 700;
      color: #D97706;
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background-color: #FFFDF8;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 20px 20px;
      border-top: 1px solid #FEF3C7;
    }
    .faq-answer p {
      font-size: 14px;
      color: var(--dark-body);
      line-height: 1.7;
    }

    /* 表单与需求匹配 */
    .form-container {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      box-shadow: var(--shadow-md);
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }
    .form-full {
      grid-column: span 2;
    }
    .form-group {
      margin-bottom: 0;
    }
    .form-label {
      display: block;
      font-size: 13.5px;
      font-weight: 700;
      color: var(--dark-title);
      margin-bottom: 6px;
    }
    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--dark-title);
      background-color: #F8FAFC;
      transition: var(--transition);
      font-family: inherit;
    }
    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      outline: none;
      border-color: var(--primary-yellow);
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px var(--yellow-glow);
    }
    .form-textarea {
      resize: vertical;
      min-height: 110px;
    }

    /* 资讯与百科文章 */
    .article-links-box {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .article-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 14px;
    }
    .article-link-item:last-child {
      border-bottom: none;
    }
    .article-link-item a:hover {
      color: #B45309;
      text-decoration: underline;
    }

    /* 官方联系方式与二维码 */
    .contact-card-grid {
      display: grid;
      grid-template-columns: 1fr 340px;
      gap: 24px;
      align-items: stretch;
    }
    .contact-info-list {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      box-shadow: var(--shadow-sm);
    }
    .contact-item-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--dark-muted);
      margin-bottom: 4px;
    }
    .contact-item-val {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-title);
    }
    .qr-box {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .qr-box img {
      width: 140px;
      height: 140px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--yellow-border);
      padding: 4px;
      background-color: #FFFFFF;
      margin-bottom: 10px;
    }
    .qr-tip {
      font-size: 13px;
      font-weight: 700;
      color: var(--dark-title);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px;
      color: var(--dark-body);
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 800;
      color: var(--dark-title);
      margin-bottom: 16px;
      letter-spacing: -0.2px;
    }
    .footer-links-list {
      list-style: none;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list a {
      font-size: 13.5px;
      color: var(--dark-muted);
    }
    .footer-links-list a:hover {
      color: var(--dark-title);
      text-decoration: underline;
    }
    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 8px;
    }
    .friendship-links a {
      font-size: 13px;
      color: var(--dark-muted);
      background-color: #F8FAFC;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }
    .friendship-links a:hover {
      color: var(--dark-title);
      border-color: var(--primary-yellow);
      background-color: var(--yellow-light);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: var(--dark-muted);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }
    .ai-page-home-link {
      font-weight: 700;
      color: #92400E;
    }

    /* 悬浮客服与返回顶部 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 990;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background-color: #FFFFFF;
      border: 1px solid var(--yellow-border);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 18px;
      color: var(--dark-title);
      transition: var(--transition);
    }
    .float-btn:hover {
      background-color: var(--primary-yellow);
      transform: scale(1.08);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-2 {
        grid-template-columns: 1fr;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-card-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: #FFFFFF;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li a {
        padding: 12px 16px;
        width: 100%;
      }
      .nav-toggle {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 26px;
      }
      .section {
        padding: 50px 0;
      }
      .section-title {
        font-size: 24px;
      }
      .grid-4, .grid-3, .process-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-full {
        grid-column: span 1;
      }
      .contact-info-list {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }