:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --accent: #f97316;
      --accent-hover: #ea580c;
      --accent-cyan: #06b6d4;
      --bg-light: #f8fafc;
      --surface: #ffffff;
      --surface-subtle: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --border-color: #e2e8f0;
      --border-focus: #3b82f6;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
      --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 10px 24px -4px rgba(15, 23, 42, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-pill: 9999px;
      --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-light);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid #e0e7ff;
      box-shadow: 0 2px 10px rgba(37, 99, 235, 0.05);
    }

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

    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .brand-area .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

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

    .brand-title span {
      color: var(--primary);
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: #eff6ff;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 2px solid transparent;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }

    .btn:hover {
      transform: translateY(-2px);
    }

    .btn:active {
      transform: translateY(0);
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 6px 18px rgba(37, 99, 235, 0.45);
      color: #ffffff;
    }

    .btn-contrast {
      background-color: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
    }

    .btn-contrast:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 6px 20px rgba(249, 115, 22, 0.45);
      color: #ffffff;
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background-color: #ffffff;
    }

    .btn-outline:hover {
      background-color: #eff6ff;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      color: var(--text-main);
    }

    .mobile-menu-btn svg {
      width: 28px;
      height: 28px;
      stroke: currentColor;
    }

    .section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-light {
      background-color: #ffffff;
    }

    .section-contrast {
      background: linear-gradient(135deg, #f8fafc 0%, #eff6ff 100%);
      border-top: 1px solid #dbeafe;
      border-bottom: 1px solid #dbeafe;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }

    .section-eyebrow {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      background-color: #dbeafe;
      border-radius: var(--radius-pill);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.25;
    }

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

    .hero-section {
      padding: 90px 0 80px 0;
      background: radial-gradient(circle at 80% 20%, #dbeafe 0%, transparent 40%),
                  radial-gradient(circle at 10% 80%, #ffedd5 0%, transparent 35%),
                  #ffffff;
      border-bottom: 1px solid #e2e8f0;
      text-align: center;
    }

    .hero-content {
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background-color: #eff6ff;
      border: 1px solid #bfdbfe;
      border-radius: var(--radius-pill);
      color: var(--primary);
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.2;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight-blue {
      color: var(--primary);
    }

    .hero-title .highlight-orange {
      color: var(--accent);
      text-decoration: underline;
      text-decoration-color: #fed7aa;
      text-underline-offset: 6px;
    }

    .hero-subtitle {
      font-size: 1.25rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-btn-major {
      font-size: 1.15rem;
      padding: 14px 38px;
      border-radius: var(--radius-md);
      box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
    }

    .hero-highlights-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      padding-top: 30px;
      border-top: 1px solid #e2e8f0;
    }

    .strip-item {
      padding: 16px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .strip-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 4px;
    }

    .strip-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    .models-marquee-section {
      background-color: #0f172a;
      color: #f8fafc;
      padding: 24px 0;
      overflow: hidden;
    }

    .models-title {
      text-align: center;
      font-size: 0.85rem;
      font-weight: 700;
      color: #94a3b8;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-bottom: 14px;
    }

    .models-chip-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 1100px;
      margin: 0 auto;
      padding: 0 16px;
    }

    .model-chip {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.16);
      padding: 5px 12px;
      border-radius: var(--radius-pill);
      font-size: 0.85rem;
      font-weight: 600;
      color: #e2e8f0;
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--accent);
      border-color: var(--accent);
      color: #ffffff;
      transform: translateY(-2px);
    }

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

    .feature-card {
      background: var(--surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: #93c5fd;
    }

    .feature-icon-wrapper {
      width: 52px;
      height: 52px;
      background: #eff6ff;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
    }

    .feature-icon-wrapper svg {
      width: 28px;
      height: 28px;
      stroke-width: 2;
    }

    .feature-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .feature-card-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    .feature-card-tag {
      margin-top: 18px;
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent);
      background-color: #fff7ed;
      padding: 3px 10px;
      border-radius: var(--radius-sm);
      align-self: flex-start;
    }

    .twocol-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .content-box h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 18px;
      color: var(--text-main);
    }

    .content-box p {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
    }

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

    .checklist li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.98rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .checklist-icon {
      color: var(--primary);
      flex-shrink: 0;
      margin-top: 3px;
    }

    .img-showcase-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .img-showcase-box img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .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-md);
      padding: 24px;
      position: relative;
      transition: var(--transition);
    }

    .step-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }

    .step-badge {
      font-size: 1.8rem;
      font-weight: 900;
      color: #e2e8f0;
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-card:hover .step-badge {
      color: var(--accent);
    }

    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .benchmark-table-container {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      margin-bottom: 30px;
    }

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

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

    .benchmark-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }

    .benchmark-table tr.highlight-row {
      background-color: #eff6ff;
    }

    .benchmark-table tr.highlight-row td {
      color: var(--primary-dark);
      font-weight: 600;
      border-bottom-color: #bfdbfe;
    }

    .score-badge-card {
      background: linear-gradient(135deg, #1e3a8a, #2563eb);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
      box-shadow: 0 10px 25px rgba(37, 99, 235, 0.25);
    }

    .score-item {
      text-align: center;
    }

    .score-val {
      font-size: 2.8rem;
      font-weight: 900;
      color: #fbbf24;
      line-height: 1;
      margin-bottom: 6px;
    }

    .score-desc {
      font-size: 0.95rem;
      font-weight: 600;
      opacity: 0.9;
    }

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

    .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;
    }

    .review-stars {
      color: #f59e0b;
      font-size: 1rem;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background-color: #dbeafe;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

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

    .reviewer-title {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

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

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

    .case-img-wrap {
      width: 100%;
      height: 240px;
      overflow: hidden;
      background-color: #f1f5f9;
    }

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

    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-body {
      padding: 24px;
    }

    .case-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      background-color: #eff6ff;
      padding: 3px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 10px;
    }

    .case-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .case-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--primary);
      box-shadow: 0 2px 10px rgba(37, 99, 235, 0.08);
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary);
      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-out;
      background-color: #f8fafc;
    }

    .faq-answer-inner {
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .form-wrapper {
      max-width: 760px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background-color: #ffffff;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .contact-card-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: 40px;
    }

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

    .contact-card-icon {
      font-size: 1.8rem;
      margin-bottom: 8px;
    }

    .contact-card-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .contact-card-value {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      word-break: break-all;
    }

    .articles-strip {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 20px 24px;
      margin-top: 30px;
    }

    .articles-header {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .article-links-wrap a {
      font-size: 0.9rem;
      color: var(--text-muted);
      background: #f1f5f9;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .article-links-wrap a:hover {
      background: #eff6ff;
      color: var(--primary);
    }

    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 24px 0;
      border-top: 3px solid var(--primary);
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-col p {
      font-size: 0.9rem;
      line-height: 1.7;
      margin-bottom: 16px;
      color: #cbd5e1;
    }

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

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

    .footer-links a {
      color: #94a3b8;
      font-size: 0.9rem;
    }

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

    .qr-wrap {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .qr-wrap img {
      width: 110px;
      height: 110px;
      border-radius: var(--radius-sm);
      background: #ffffff;
      padding: 4px;
    }

    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding: 20px 0;
      font-size: 0.85rem;
    }

    .friend-links-box span {
      color: #ffffff;
      font-weight: 700;
      margin-right: 12px;
    }

    .friend-links-box a {
      color: #94a3b8;
      margin-right: 16px;
      display: inline-block;
      line-height: 1.8;
    }

    .friend-links-box a:hover {
      color: var(--accent);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--surface);
      color: var(--primary);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: var(--transition);
      position: relative;
    }

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

    .float-btn svg {
      width: 24px;
      height: 24px;
      stroke-width: 2;
    }

    .float-popover {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
      color: var(--text-main);
    }

    .float-btn:hover .float-popover {
      display: block;
    }

    .float-popover img {
      width: 100%;
      height: auto;
      margin-bottom: 6px;
    }

    .float-popover span {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--text-muted);
    }

    @media (max-width: 1024px) {
      .feature-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-highlights-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .site-header {
        position: relative;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        padding: 16px 0;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        padding: 12px 20px;
        width: 100%;
      }
      .nav-actions {
        display: none;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .hero-subtitle {
        font-size: 1.05rem;
      }
      .twocol-layout {
        grid-template-columns: 1fr;
      }
      .feature-grid,
      .case-grid,
      .reviews-grid,
      .steps-grid,
      .hero-highlights-strip,
      .contact-card-grid {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }