:root {
      --primary-grad: linear-gradient(135deg, #FF5E62 0%, #FF9966 50%, #6C5CE7 100%);
      --accent-rainbow: linear-gradient(90deg, #FF416C, #8A2387, #E94057, #F27121, #00B4DB, #0083B0);
      --bg-light: #FDFBFB;
      --bg-card: rgba(255, 255, 255, 0.92);
      --text-main: #1D2129;
      --text-sub: #4E5969;
      --text-light: #86909C;
      --color-brand: #6C5CE7;
      --color-coral: #FF5E62;
      --color-gold: #FFA800;
      --color-teal: #00B894;
      --color-blue: #0984E3;
      --shadow-sm: 0 4px 12px rgba(108, 92, 231, 0.08);
      --shadow-md: 0 10px 25px rgba(255, 94, 98, 0.12);
      --shadow-lg: 0 20px 40px rgba(108, 92, 231, 0.15);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --border-color: rgba(229, 230, 235, 0.8);
    }

    * {
      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: #FAF9F6;
      background-image: 
        radial-gradient(at 0% 0%, rgba(255, 94, 98, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(108, 92, 231, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(0, 184, 148, 0.06) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

    ul, ol {
      list-style: none;
    }

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

    /* 斑斓按钮体系 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: 99px;
      cursor: pointer;
      border: none;
      transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      font-size: 1rem;
      text-align: center;
      position: relative;
      overflow: hidden;
      z-index: 1;
    }

    .btn-rainbow {
      background: linear-gradient(135deg, #FF5E62 0%, #FF9966 35%, #6C5CE7 100%);
      color: #FFFFFF !important;
      box-shadow: 0 8px 20px rgba(255, 94, 98, 0.35);
    }

    .btn-rainbow:hover {
      transform: translateY(-2px) scale(1.02);
      box-shadow: 0 12px 28px rgba(108, 92, 231, 0.45);
    }

    .btn-glow {
      background: #FFFFFF;
      color: var(--text-main) !important;
      border: 1px solid rgba(108, 92, 231, 0.25);
      box-shadow: var(--shadow-sm);
    }

    .btn-glow:hover {
      border-color: var(--color-brand);
      color: var(--color-brand) !important;
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }

    .btn-full {
      width: 100%;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(229, 230, 235, 0.8);
      transition: all 0.3s ease;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--text-main);
    }

    .logo-box .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-item {
      display: block;
      padding: 8px 14px;
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-sub);
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }

    .nav-item:hover, .nav-item.active {
      color: var(--color-brand);
      background: rgba(108, 92, 231, 0.06);
    }

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

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

    /* 标题与版式公用 */
    .section-spacing {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      border-radius: 99px;
      margin-bottom: 14px;
      background: linear-gradient(90deg, rgba(255, 94, 98, 0.12), rgba(108, 92, 231, 0.12));
      color: var(--color-brand);
      border: 1px solid rgba(108, 92, 231, 0.2);
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--text-main);
    }

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

    /* 首屏 HERO 区域（严格无图片） */
    .hero-section {
      padding: 90px 0 70px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      border-radius: 99px;
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(255, 94, 98, 0.3);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #E65100;
    }

    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #FF5E62;
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 94, 98, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(255, 94, 98, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 94, 98, 0); }
    }

    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #111827;
      letter-spacing: -0.5px;
    }

    .hero-title .rainbow-text {
      background: linear-gradient(135deg, #FF5E62 0%, #FF9966 30%, #6C5CE7 70%, #00B894 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.25rem;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

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

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

    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border-top: 4px solid transparent;
    }

    .metric-card:nth-child(1) { border-top-color: #FF5E62; }
    .metric-card:nth-child(2) { border-top-color: #FFA800; }
    .metric-card:nth-child(3) { border-top-color: #6C5CE7; }
    .metric-card:nth-child(4) { border-top-color: #00B894; }

    .metric-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .metric-val {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .metric-name {
      font-size: 0.9rem;
      color: var(--text-light);
    }

    /* 平台介绍 & 核心能力卡片 */
    .feature-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(108, 92, 231, 0.3);
    }

    .feature-icon-box {
      width: 54px;
      height: 54px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      font-size: 1.5rem;
      font-weight: 700;
      color: #FFFFFF;
      background: var(--primary-grad);
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

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

    /* 场景矩阵（多彩标签与卡片） */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scenario-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--color-brand);
    }

    .scenario-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--accent-rainbow);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .scenario-card:hover::after {
      opacity: 1;
    }

    .scenario-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      background: rgba(108, 92, 231, 0.08);
      color: var(--color-brand);
      margin-bottom: 10px;
    }

    .scenario-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .scenario-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 模型矩阵徽章云 */
    .model-pills-wrap {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .pills-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      margin-top: 24px;
    }

    .model-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 18px;
      border-radius: 99px;
      background: #FFFFFF;
      border: 1px solid rgba(200, 201, 204, 0.6);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 6px rgba(0,0,0,0.03);
      transition: all 0.25s ease;
    }

    .model-pill:hover {
      border-color: var(--color-brand);
      color: var(--color-brand);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    /* 评测与对比表格板块 */
    .review-highlight {
      background: linear-gradient(135deg, rgba(255, 94, 98, 0.06), rgba(108, 92, 231, 0.06));
      border: 1px solid rgba(108, 92, 231, 0.15);
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }

    .score-badge-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .big-score {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
      background: linear-gradient(135deg, #FF5E62, #6C5CE7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .score-details {
      display: flex;
      flex-direction: column;
    }

    .stars-line {
      color: #FFA800;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .score-meta {
      font-size: 0.95rem;
      color: var(--text-sub);
      margin-top: 4px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .compare-table th, .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #F8F9FB;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .highlight-col {
      background: rgba(108, 92, 231, 0.03);
      font-weight: 600;
      color: var(--color-brand);
    }

    .badge-check {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: var(--color-teal);
      font-weight: 700;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      position: absolute;
      top: -16px;
      left: 24px;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: var(--primary-grad);
      color: #FFFFFF;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      box-shadow: 0 4px 10px rgba(255, 94, 98, 0.3);
    }

    .step-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-top: 10px;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 媒体与案例展示（非首屏） */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

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

    .gallery-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }

    .gallery-img-box {
      width: 100%;
      height: 260px;
      background: #ECEFF1;
      overflow: hidden;
      position: relative;
    }

    .gallery-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .gallery-card:hover .gallery-img-box img {
      transform: scale(1.05);
    }

    .gallery-info {
      padding: 24px;
    }

    .gallery-info h4 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .gallery-info p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 用户评论 */
    .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: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .review-stars {
      color: #FFA800;
      font-size: 1.1rem;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F0F2F5;
      padding-top: 16px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #6C5CE7, #FF5E62);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-info span {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴折叠 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 1.4rem;
      color: var(--color-brand);
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.7;
      background: #FAFBFC;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 24px 24px;
      border-top: 1px solid var(--border-color);
    }

    /* 需求匹配与联系表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-col h3 {
      font-size: 1.75rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .contact-list {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      font-size: 0.95rem;
      color: var(--text-sub);
    }

    .contact-item strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-container {
      margin-top: 24px;
      display: flex;
      align-items: center;
      gap: 20px;
      padding: 16px;
      background: #F8F9FB;
      border-radius: var(--radius-md);
      border: 1px dashed rgba(108, 92, 231, 0.3);
    }

    .qr-box {
      width: 100px;
      height: 100px;
      background: #FFFFFF;
      padding: 6px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      background: #FDFDFD;
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: all 0.25s ease;
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--color-brand);
      box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
      background: #FFFFFF;
    }

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

    /* 行业资讯与文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-item {
      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;
      transition: all 0.3s ease;
    }

    .article-item:hover {
      border-color: var(--color-coral);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .article-tag {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--color-coral);
      margin-bottom: 8px;
    }

    .article-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .article-link {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--color-brand);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      margin-top: 12px;
    }

    .article-link:hover {
      text-decoration: underline;
    }

    /* 友情链接与页脚 */
    .footer-section {
      background: #18191C;
      color: #E4E7ED;
      padding: 60px 0 30px 0;
      border-top: 4px solid #6C5CE7;
    }

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

    .footer-col h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      position: relative;
    }

    .footer-links-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links-list a {
      color: #A0AEC0;
      font-size: 0.9rem;
    }

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

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friendship-links a {
      color: #A0AEC0;
      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);
    }

    .friendship-links a:hover {
      color: #FFFFFF;
      background: rgba(108, 92, 231, 0.3);
      border-color: #6C5CE7;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      color: #718096;
    }

    /* 浮动操作栏 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 990;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .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;
      cursor: pointer;
      color: var(--color-brand);
      font-weight: 700;
      font-size: 1.1rem;
      transition: all 0.3s ease;
    }

    .float-btn:hover {
      background: var(--color-brand);
      color: #FFFFFF;
      transform: translateY(-3px);
    }

    /* 响应式样式 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.4rem; }
      .feature-grid-3, .reviews-grid, .articles-grid { grid-template-columns: repeat(2, 1fr); }
      .scenario-grid, .steps-grid, .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .contact-wrapper { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links, .header-actions { display: none; }
      .mobile-toggle { display: block; }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .hero-title { font-size: 1.85rem; }
      .hero-metrics, .feature-grid-3, .scenario-grid, .steps-grid, .gallery-grid, .reviews-grid, .articles-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid { grid-template-columns: 1fr; }
      .review-highlight { flex-direction: column; align-items: flex-start; }
      .contact-wrapper { padding: 24px; }
    }