:root {
      --primary: #4f46e5;
      --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
      --rainbow-subtle: linear-gradient(90deg, rgba(239,68,68,0.08), rgba(249,115,22,0.08), rgba(234,179,8,0.08), rgba(34,197,94,0.08), rgba(6,182,212,0.08), rgba(99,102,241,0.08), rgba(168,85,247,0.08));
      --rainbow-border: linear-gradient(90deg, #ef4444, #f97316, #eab308, #22c55e, #06b6d4, #6366f1, #a855f7);
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
      --shadow-rainbow: 0 10px 25px -5px rgba(99, 102, 241, 0.15);
      --radius: 12px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 10%, rgba(99, 102, 241, 0.03) 0%, transparent 40%),
                  radial-gradient(circle at 90% 30%, rgba(236, 72, 153, 0.03) 0%, transparent 40%),
                  radial-gradient(circle at 50% 80%, rgba(6, 182, 212, 0.03) 0%, transparent 50%),
                  #f8fafc;
      min-height: 100vh;
      overflow-x: hidden;
    }

    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* 顶部导航 */
    .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-area {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .brand-text {
      display: flex;
      flex-direction: column;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-sub {
      font-size: 0.75rem;
      color: #6366f1;
      font-weight: 600;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-item a, .ai-page-home-link {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.92rem;
      font-weight: 500;
      border-radius: 6px;
      transition: all 0.2s ease;
    }
    .nav-item a:hover, .ai-page-home-link:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.06);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-portal {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-gradient);
      color: #ffffff !important;
      padding: 9px 20px;
      border-radius: 9999px;
      font-size: 0.92rem;
      font-weight: 600;
      text-decoration: none;
      box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .btn-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(99, 102, 241, 0.45);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
    }
    .nav-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-main);
      margin: 4px 0;
      transition: 0.3s;
    }

    /* 通用区块与标题 */
    section {
      padding: 72px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 14px;
      border-radius: 9999px;
      font-size: 0.82rem;
      font-weight: 600;
      color: #4f46e5;
      background: linear-gradient(90deg, #eef2ff, #fdf2f8);
      border: 1px solid rgba(99, 102, 241, 0.2);
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 彩虹线装饰 */
    .rainbow-line {
      height: 3px;
      width: 100%;
      background: var(--rainbow-border);
      border: none;
    }

    /* 首屏 Hero - 无图片约束 */
    .hero-section {
      padding: 84px 0 60px;
      background: linear-gradient(180deg, rgba(248,250,252,0.6) 0%, rgba(241,245,249,0.9) 100%);
      position: relative;
    }
    .hero-wrap {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin: 16px 0 20px;
      letter-spacing: -1px;
    }
    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 1.18rem;
      color: var(--text-muted);
      max-width: 820px;
      margin-bottom: 32px;
      line-height: 1.75;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      margin-bottom: 48px;
    }
    .btn-main-hero {
      background: var(--primary-gradient);
      color: #fff;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 10px;
      text-decoration: none;
      box-shadow: 0 10px 25px rgba(79, 70, 229, 0.35);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-main-hero:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(79, 70, 229, 0.45);
    }
    .btn-sub-hero {
      background: #ffffff;
      color: var(--text-main);
      font-size: 1.05rem;
      font-weight: 600;
      padding: 14px 28px;
      border-radius: 10px;
      text-decoration: none;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .btn-sub-hero:hover {
      border-color: #6366f1;
      color: #4f46e5;
      background: #f8fafc;
    }

    /* Hero 数据看板 */
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      margin-top: 10px;
    }
    .metric-card {
      background: #ffffff;
      padding: 24px 18px;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
      text-align: center;
      position: relative;
      overflow: hidden;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .metric-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--rainbow-border);
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-rainbow);
    }
    .metric-val {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .metric-val em {
      font-style: normal;
      font-size: 1.1rem;
      color: #4f46e5;
    }
    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台矩阵标签条 */
    .model-tags-wrap {
      margin-top: 36px;
      padding: 16px 20px;
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      width: 100%;
      box-shadow: var(--shadow-sm);
    }
    .model-tags-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 10px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .model-tags-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }
    .model-badge {
      background: #f1f5f9;
      color: #334155;
      font-size: 0.78rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s;
    }
    .model-badge:hover {
      background: #eef2ff;
      color: #4f46e5;
      border-color: #c7d2fe;
    }

    /* 卡片网格体系 */
    .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: 28px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 26px 22px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -6px rgba(79, 70, 229, 0.12);
      border-color: #cbd5e1;
    }
    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 16px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
    }
    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .card-tag {
      align-self: flex-start;
      margin-top: 14px;
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: #f1f5f9;
      color: #475569;
      font-weight: 600;
    }

    /* 多模型协同特色块 */
    .feature-banner {
      background: linear-gradient(135deg, #f8fafc 0%, #edf2f7 100%);
      border: 1px solid #e2e8f0;
      border-radius: 16px;
      padding: 36px;
      margin-top: 40px;
      box-shadow: var(--shadow-sm);
    }
    .feature-banner-inner {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 32px;
      align-items: center;
    }
    .feature-highlight-list {
      list-style: none;
      margin-top: 16px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .feature-highlight-list li {
      font-size: 0.94rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .feature-highlight-list li::before {
      content: '✓';
      display: inline-block;
      width: 18px;
      height: 18px;
      background: #22c55e;
      color: #fff;
      font-size: 0.75rem;
      border-radius: 50%;
      text-align: center;
      line-height: 18px;
    }

    /* 标准流程时间线 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      padding: 24px 18px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      position: relative;
    }
    .step-num {
      width: 32px;
      height: 32px;
      background: var(--primary-gradient);
      color: #fff;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 12px;
    }
    .step-item h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .step-item p {
      font-size: 0.84rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测卡片与表格 */
    .eval-highlight-box {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 32px;
      box-shadow: var(--shadow-md);
      margin-bottom: 32px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      background-image: var(--rainbow-subtle);
    }
    .eval-score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .score-circle {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
    }
    .score-circle .score-num {
      font-size: 1.45rem;
      font-weight: 900;
      line-height: 1;
    }
    .score-circle .score-max {
      font-size: 0.65rem;
      opacity: 0.9;
    }
    .score-text h3 {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--text-main);
    }
    .stars {
      color: #f59e0b;
      font-size: 1.1rem;
      margin-top: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .custom-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    .custom-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-col {
      background: rgba(79, 70, 229, 0.03);
      font-weight: 600;
      color: #4f46e5;
    }

    /* 案例中心展示 */
    .case-card {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .case-media-container {
      width: 100%;
      height: 200px;
      background: #e2e8f0;
      overflow: hidden;
      position: relative;
    }
    .case-media-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .case-card:hover .case-media-container img {
      transform: scale(1.03);
    }
    .case-info {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .case-info h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .case-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 12px;
      flex-grow: 1;
    }

    /* 用户评论 */
    .review-card {
      background: #ffffff;
      border-radius: 12px;
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .review-avatar-box {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--rainbow-subtle);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #4f46e5;
    }
    .review-user-name {
      font-size: 0.96rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .review-user-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .review-content {
      font-size: 0.9rem;
      color: #334155;
      line-height: 1.65;
    }

    /* FAQ 手风琴面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item:hover {
      border-color: #cbd5e1;
    }
    .faq-question {
      padding: 18px 22px;
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      font-size: 1rem;
      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: #6366f1;
      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: #f8fafc;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 18px 22px;
      border-top: 1px solid var(--border-color);
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      padding: 36px;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      font-size: 0.94rem;
      background: #f8fafc;
      color: var(--text-main);
      transition: border-color 0.2s, background 0.2s;
    }
    .form-control:focus {
      outline: none;
      border-color: #6366f1;
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }
    .btn-submit {
      width: 100%;
      background: var(--primary-gradient);
      color: #fff;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 14px;
      border-radius: 8px;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
      transition: all 0.2s ease;
    }
    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.4);
    }

    /* 联系渠道卡片 */
    .contact-info-card {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      padding: 32px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-qr-box {
      text-align: center;
      padding: 16px;
      background: #f8fafc;
      border-radius: 12px;
      border: 1px dashed var(--border-color);
    }
    .contact-qr-box img {
      max-width: 150px;
      height: auto;
      border-radius: 8px;
      margin: 8px auto;
      display: block;
    }
    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.94rem;
      color: var(--text-main);
    }
    .contact-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: #eef2ff;
      color: #4f46e5;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    /* 资讯列表 */
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .news-item-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 20px;
      background: #ffffff;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.95rem;
      font-weight: 500;
      transition: all 0.2s;
    }
    .news-item-link:hover {
      border-color: #6366f1;
      color: #4f46e5;
      transform: translateX(4px);
    }

    /* 底部通用区域 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 32px;
      color: var(--text-muted);
      font-size: 0.88rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 2fr;
      gap: 32px;
      margin-bottom: 36px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-links-list a:hover {
      color: #4f46e5;
    }
    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-friend-links a {
      color: var(--text-muted);
      text-decoration: none;
      padding: 4px 10px;
      background: #f1f5f9;
      border-radius: 6px;
      font-size: 0.82rem;
      transition: all 0.2s;
    }
    .footer-friend-links a:hover {
      background: #eef2ff;
      color: #4f46e5;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.84rem;
    }

    /* 悬浮客服挂件 */
    .float-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-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #4f46e5;
      text-decoration: none;
      font-size: 1.2rem;
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .float-btn:hover {
      background: #4f46e5;
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .process-steps { grid-template-columns: repeat(3, 1fr); }
      .hero-metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .header-inner { height: 64px; }
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active { display: flex; }
      .nav-toggle { display: block; }
      .hero-h1 { font-size: 2rem; }
      .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: 1fr; }
      .feature-banner-inner { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }