:root {
      --primary-purple: #7928ca;
      --primary-purple-dark: #581c87;
      --primary-purple-light: #9f55ff;
      --accent-magenta: #e11d48;
      --accent-glow: rgba(121, 40, 202, 0.12);
      --bg-page: #faf7fd;
      --bg-card: #ffffff;
      --bg-alt: #f3ecfb;
      --text-main: #190f2a;
      --text-muted: #5e5175;
      --text-light: #8e80a5;
      --border-color: #ebdff7;
      --border-purple: #d8bbf5;
      --shadow-sm: 0 2px 8px rgba(121, 40, 202, 0.05);
      --shadow-md: 0 8px 24px rgba(121, 40, 202, 0.08);
      --shadow-lg: 0 16px 36px rgba(121, 40, 202, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 10%, #f7efff 0%, #faf7fd 50%, #f6effe 100%);
      min-height: 100vh;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    /* 头部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      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-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-wrap img {
      max-height: 42px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary-purple-dark);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-purple);
      background: var(--bg-alt);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #ffffff !important;
      background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-purple-light) 100%);
      border-radius: 999px;
      box-shadow: 0 4px 14px rgba(121, 40, 202, 0.35);
      border: none;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(121, 40, 202, 0.45);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--primary-purple-dark);
      background: #ffffff;
      border: 1px solid var(--border-purple);
      border-radius: 999px;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .btn-secondary:hover {
      background: var(--bg-alt);
      border-color: var(--primary-purple);
      color: var(--primary-purple);
    }

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

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 首屏 Hero (无任何图片) */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(235, 223, 247, 0.4) 0%, rgba(250, 247, 253, 0) 100%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-container {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary-purple-dark);
      background: #ffffff;
      border: 1px solid var(--border-purple);
      border-radius: 999px;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary-purple) 0%, #d946ef 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 780px;
      margin: 0 auto 36px;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-cta-group .btn-lg {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-purple);
      border-radius: var(--radius-md);
      padding: 22px 16px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .metric-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-purple);
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用章节样式 */
    .section-block {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-block.alt-bg {
      background-color: #f7f1fc;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary-purple);
      background: var(--bg-alt);
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 12px;
      border: 1px solid var(--border-purple);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 平台介绍与关于我们 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-card {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .about-card h3 {
      font-size: 1.4rem;
      color: var(--primary-purple-dark);
      margin-bottom: 16px;
    }

    .about-card p {
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.7;
    }

    .about-features {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .about-features li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-main);
    }

    .about-features li::before {
      content: "✓";
      color: var(--primary-purple);
      font-weight: bold;
    }

    /* AIGC 服务矩阵卡片 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-5px);
      border-color: var(--primary-purple-light);
      box-shadow: var(--shadow-lg);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--bg-alt);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: var(--primary-purple);
      margin-bottom: 18px;
      border: 1px solid var(--border-purple);
    }

    .service-card h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

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

    .service-tags span {
      font-size: 0.75rem;
      background: var(--bg-page);
      color: var(--text-muted);
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }

    /* 平台支持模型标签流 */
    .model-pills-wrap {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-purple);
      box-shadow: var(--shadow-sm);
      margin-top: 36px;
      text-align: center;
    }

    .model-pills-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary-purple-dark);
      margin-bottom: 18px;
    }

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

    .model-pill {
      font-size: 0.85rem;
      font-weight: 500;
      padding: 6px 14px;
      background: var(--bg-alt);
      color: var(--text-main);
      border-radius: 999px;
      border: 1px solid var(--border-purple);
      transition: all 0.2s ease;
    }

    .model-pill:hover {
      background: var(--primary-purple);
      color: #ffffff;
      transform: scale(1.05);
    }

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

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

    .step-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--border-purple);
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-card h3 {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 对比评测表格与卡片 */
    .review-highlight {
      background: linear-gradient(135deg, #7928ca 0%, #9f55ff 100%);
      color: #ffffff;
      padding: 28px 36px;
      border-radius: var(--radius-lg);
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-md);
      flex-wrap: wrap;
      gap: 20px;
    }

    .review-score-box {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .score-badge {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1;
      background: rgba(255, 255, 255, 0.2);
      padding: 12px 20px;
      border-radius: var(--radius-md);
    }

    .score-meta h3 {
      font-size: 1.3rem;
      margin-bottom: 4px;
      color: #ffffff;
    }

    .stars {
      color: #ffd700;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

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

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

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

    .compare-table th {
      background: var(--bg-alt);
      color: var(--primary-purple-dark);
      font-weight: 600;
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .highlight-cell {
      background: rgba(121, 40, 202, 0.04);
      font-weight: 600;
      color: var(--primary-purple-dark);
    }

    /* 案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--bg-alt);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .case-content {
      padding: 20px;
    }

    .case-content h3 {
      font-size: 1.05rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .case-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 客户评论 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .testimonial-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;
    }

    .testimonial-body {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      font-style: italic;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .user-avatar-placeholder {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-purple-light) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
    }

    .user-meta h4 {
      font-size: 0.92rem;
      color: var(--text-main);
    }

    .user-meta p {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: border-color 0.25s ease;
    }

    .faq-item.active {
      border-color: var(--primary-purple);
    }

    .faq-question {
      padding: 18px 20px;
      font-size: 0.98rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
    }

    .faq-question:hover {
      color: var(--primary-purple);
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary-purple);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: var(--bg-page);
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 20px 20px;
      border-top: 1px solid var(--border-color);
    }

    .faq-answer p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 需求表单与加盟代理 */
    .form-section-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

    .form-card {
      background: #ffffff;
      padding: 34px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-purple);
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      outline: none;
      background: #faf7fd;
      color: var(--text-main);
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary-purple);
      background: #ffffff;
      box-shadow: 0 0 0 3px var(--accent-glow);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .agent-info-card {
      background: linear-gradient(180deg, #ffffff 0%, #f6effe 100%);
      border: 1px solid var(--border-purple);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: var(--shadow-sm);
    }

    .agent-info-card h3 {
      font-size: 1.35rem;
      color: var(--primary-purple-dark);
      margin-bottom: 14px;
    }

    .agent-info-card p {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
      margin-bottom: 20px;
    }

    .agent-benefit-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .agent-benefit-list li {
      padding: 8px 0;
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.9rem;
      color: var(--text-main);
      border-bottom: 1px dashed var(--border-color);
    }

    .agent-benefit-list li:last-child {
      border-bottom: none;
    }

    /* 资讯与外链板块 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 24px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .article-item:hover {
      border-color: var(--primary-purple);
      transform: translateY(-3px);
    }

    .article-item h4 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .article-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      padding: 16px 20px;
      background: #ffffff;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .article-link-tag {
      font-size: 0.85rem;
      color: var(--primary-purple);
      text-decoration: underline;
    }

    /* 页面底部与页脚 */
    .site-footer {
      background: #180e29;
      color: #d1c5e6;
      padding: 60px 0 24px;
      border-top: 1px solid #2f1d4d;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.25rem;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.7;
      color: #a89bbd;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links li a {
      font-size: 0.88rem;
      color: #a89bbd;
    }

    .footer-links li a:hover {
      color: #ffffff;
      padding-left: 4px;
    }

    .footer-qr-box {
      text-align: center;
      background: rgba(255, 255, 255, 0.05);
      padding: 14px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.1);
      display: inline-block;
    }

    .footer-qr-box img {
      max-width: 110px;
      height: auto;
      display: block;
      margin: 0 auto 8px;
      border-radius: 4px;
    }

    .footer-qr-box span {
      font-size: 0.8rem;
      color: #d1c5e6;
    }

    .footer-bottom {
      border-top: 1px solid #281845;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
      color: #8c7fa3;
    }

    .footer-friend-links {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
    }

    .footer-friend-links a {
      color: #a89bbd;
    }

    .footer-friend-links a:hover {
      color: #ffffff;
    }

    /* 浮动客服栏与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-purple);
      color: var(--primary-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-size: 1.2rem;
      transition: all 0.3s ease;
      position: relative;
    }

    .float-btn:hover {
      background: var(--primary-purple);
      color: #ffffff;
      transform: scale(1.08);
    }

    .float-qr-pop {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-purple);
      display: none;
      width: 140px;
      text-align: center;
    }

    .float-qr-pop img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .float-qr-pop span {
      font-size: 0.78rem;
      color: var(--text-main);
      display: block;
    }

    .float-btn:hover .float-qr-pop {
      display: block;
    }

    /* 响应式样式 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid,
      .form-section-wrap {
        grid-template-columns: 1fr;
      }
      .cards-grid-3,
      .case-grid,
      .testimonial-grid,
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-4,
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .faq-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 12px 16px;
      }
      .mobile-menu-btn {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 1.8rem;
      }
      .hero-metrics-grid,
      .cards-grid-3,
      .cards-grid-4,
      .steps-grid,
      .case-grid,
      .testimonial-grid,
      .articles-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .review-highlight {
        flex-direction: column;
        align-items: flex-start;
      }
      .about-features {
        grid-template-columns: 1fr;
      }
    }