/* CSS 全局变量：渐变青科技风 (Teal/Cyan Tech Theme) */
    :root {
      --primary: #0d9488;
      --primary-dark: #0f766e;
      --primary-light: #14b8a6;
      --secondary: #0284c7;
      --accent: #06b6d4;
      --bg-main: #f8fcfb;
      --bg-surface: #ffffff;
      --bg-alt: #f0fdfa;
      --text-main: #0f2a2a;
      --text-body: #334e4e;
      --text-muted: #627d7d;
      --border-color: #d1e7e5;
      --card-shadow: 0 10px 25px -5px rgba(13, 148, 136, 0.08), 0 8px 10px -6px rgba(13, 148, 136, 0.04);
      --hover-shadow: 0 20px 30px -10px rgba(13, 148, 136, 0.15);
      --radius: 12px;
      --transition: all 0.28s ease;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

    a:hover {
      color: var(--primary-dark);
    }

    /* 统一容器标准 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(13, 148, 136, 0.05);
    }

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

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-text {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
    }

    /* 指定需求：.nav-links gap 为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
      transition: var(--transition);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: rgba(20, 184, 166, 0.08);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 15px;
    }

    .btn-header-primary {
      padding: 8px 18px;
      background: linear-gradient(135deg, var(--primary-light), var(--primary));
      color: #ffffff !important;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(13, 148, 136, 0.25);
    }

    .btn-header-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(13, 148, 136, 0.35);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      color: var(--text-main);
    }

    .mobile-menu-btn svg {
      width: 26px;
      height: 26px;
    }

    /* 通用区块排版 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: var(--bg-alt);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

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

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      background: rgba(13, 148, 136, 0.1);
      border: 1px solid rgba(13, 148, 136, 0.2);
      border-radius: 50px;
      margin-bottom: 14px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 15px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 HERO 区域 - 严格无任何图片 */
    .hero-section {
      padding: 90px 0 100px 0;
      background: linear-gradient(180deg, #e6f7f5 0%, #f8fcfb 100%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-decor-1 {
      position: absolute;
      top: -100px;
      left: 50%;
      transform: translateX(-50%);
      width: 700px;
      height: 500px;
      background: radial-gradient(circle, rgba(20, 184, 166, 0.18) 0%, rgba(2, 132, 199, 0.08) 50%, transparent 70%);
      filter: blur(50px);
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid rgba(13, 148, 136, 0.25);
      border-radius: 30px;
      color: var(--primary-dark);
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 4px 15px rgba(13, 148, 136, 0.08);
    }

    .hero-tag-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    /* H1 要求在20字内 */
    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-body);
      max-width: 760px;
      margin: 0 auto 35px auto;
      line-height: 1.7;
    }

    .hero-btn-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

    .btn-main-action {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff !important;
      background: linear-gradient(135deg, #0d9488 0%, #0284c7 100%);
      border-radius: 10px;
      box-shadow: 0 8px 20px rgba(13, 148, 136, 0.3);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(13, 148, 136, 0.4);
    }

    .btn-sub-action {
      padding: 14px 28px;
      font-size: 1.02rem;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
      transition: var(--transition);
    }

    .btn-sub-action:hover {
      background: #f0fdfa;
      border-color: var(--primary-light);
      color: var(--primary);
    }

    /* 首屏纯 CSS 数据指标卡片组 */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .hero-stat-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(13, 148, 136, 0.15);
      padding: 20px 16px;
      border-radius: var(--radius);
      box-shadow: var(--card-shadow);
      text-align: center;
      transition: var(--transition);
    }

    .hero-stat-card:hover {
      transform: translateY(-3px);
      border-color: var(--primary-light);
      box-shadow: var(--hover-shadow);
    }

    .hero-stat-num {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: inherit;
    }

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

    /* 平台核心模型矩阵 */
    .models-marquee-wrapper {
      padding: 25px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
    }

    .models-chip-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-chip {
      padding: 6px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      background: var(--bg-alt);
      color: var(--primary-dark);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      transition: var(--transition);
    }

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

    /* 网格通用布局 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

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

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

    /* 卡片通用样式 */
    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--hover-shadow);
      border-color: var(--primary-light);
    }

    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(20, 184, 166, 0.15), rgba(2, 132, 199, 0.15));
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      font-size: 1.3rem;
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.93rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    .card-tag {
      display: inline-block;
      margin-top: 14px;
      font-size: 0.8rem;
      color: var(--primary-dark);
      font-weight: 600;
    }

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

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

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-light), var(--primary));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 14px;
    }

    /* 评测与对比表格板块 */
    .review-score-panel {
      background: linear-gradient(135deg, #0d9488 0%, #0284c7 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 36px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 35px;
      box-shadow: 0 15px 35px rgba(13, 148, 136, 0.25);
    }

    .score-left h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .score-left p {
      color: rgba(255, 255, 255, 0.9);
      font-size: 0.98rem;
    }

    .score-right {
      text-align: right;
    }

    .score-stars {
      color: #fbbf24;
      font-size: 1.4rem;
      margin-bottom: 4px;
      letter-spacing: 2px;
    }

    .score-big {
      font-size: 2.6rem;
      font-weight: 900;
      line-height: 1;
    }

    .score-big span {
      font-size: 1.1rem;
      font-weight: normal;
      opacity: 0.85;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

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

    .compare-table th {
      background: #f0fdfa;
      color: var(--text-main);
      font-weight: 700;
    }

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

    .highlight-cell {
      background: rgba(20, 184, 166, 0.06);
      color: var(--primary-dark);
      font-weight: 700;
    }

    /* 案例中心媒体展示 */
    .media-card-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 20px;
      align-items: stretch;
    }

    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .media-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #e2e8f0;
      position: relative;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.03);
    }

    .media-body {
      padding: 20px;
      flex-grow: 1;
    }

    .media-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .media-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 用户评论卡片 */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

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

    .review-info h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .review-info p {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 12px;
      font-style: italic;
    }

    .review-rating {
      color: #f59e0b;
      font-size: 0.88rem;
    }

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: var(--primary-light);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 22px;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #fafdfc;
    }

    .faq-answer-inner {
      padding: 0 22px 20px 22px;
      font-size: 0.94rem;
      color: var(--text-body);
      line-height: 1.65;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    /* 需求表单与联系我们板块 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--card-shadow);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: #fdfefe;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
      background: #ffffff;
    }

    .form-textarea {
      resize: vertical;
      min-height: 90px;
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(13, 148, 136, 0.25);
      transition: var(--transition);
    }

    .btn-submit:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 20px;
    }

    .contact-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: rgba(20, 184, 166, 0.12);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      flex-shrink: 0;
    }

    .contact-qr-box {
      text-align: center;
      padding: 16px;
      background: var(--bg-alt);
      border: 1px dashed var(--border-color);
      border-radius: 10px;
      margin-top: 10px;
    }

    .contact-qr-box img {
      width: 120px;
      height: 120px;
      border-radius: 6px;
      margin-bottom: 8px;
    }

    /* 行业资讯 & 最新文章 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-tag {
      font-size: 0.78rem;
      padding: 2px 8px;
      background: rgba(2, 132, 199, 0.1);
      color: var(--secondary);
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 10px;
      font-weight: 600;
    }

    .article-link-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .article-link-title:hover {
      color: var(--primary);
    }

    .article-meta {
      font-size: 0.82rem;
      color: var(--text-muted);
      margin-top: 10px;
    }

    /* 底部收尾体系 */
    .site-footer {
      background: #081d1d;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 3px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 14px;
    }

    .footer-desc {
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 18px;
      color: #cbd5e1;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      position: relative;
      padding-bottom: 6px;
    }

    .footer-col h5::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 2px;
      background: var(--primary-light);
    }

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

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

    .footer-links-list li a {
      color: #94a3b8;
      font-size: 0.88rem;
    }

    .footer-links-list li a:hover {
      color: var(--primary-light);
      padding-left: 4px;
    }

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .friend-links-box a {
      color: #94a3b8;
      font-size: 0.85rem;
      background: rgba(255, 255, 255, 0.05);
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .friend-links-box a:hover {
      color: #ffffff;
      background: var(--primary);
      border-color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 25px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 浮动客服与返回顶部 */
    .float-widget {
      position: fixed;
      right: 24px;
      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-color);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      cursor: pointer;
      transition: var(--transition);
    }

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

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

    @media (max-width: 768px) {
      .site-header .nav-wrapper {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .site-header .nav-wrapper.show {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
      }
      .nav-links li { width: 100%; }
      .nav-links li a { width: 100%; padding: 10px 0; }
      .header-actions { margin-left: 0; margin-top: 15px; width: 100%; }
      .btn-header-primary { width: 100%; text-align: center; }
      .mobile-menu-btn { display: block; }

      .hero-title { font-size: 2rem; }
      .section-title { font-size: 1.6rem; }
      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .steps-grid { grid-template-columns: 1fr; }
      .review-score-panel { flex-direction: column; text-align: center; gap: 15px; }
      .score-right { text-align: center; }
      .footer-grid { grid-template-columns: 1fr; }
    }