:root {
      --primary: #0d9488;
      --primary-dark: #0f766e;
      --primary-light: #ccfbf1;
      --secondary: #0284c7;
      --accent: #14b8a6;
      --accent-soft: #f0fdfa;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #94a3b8;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --border-focus: #14b8a6;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
      --shadow-hover: 0 14px 24px -4px rgba(13, 148, 136, 0.15);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --transition: all 0.28s ease;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    .brand-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: var(--accent-soft);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      text-align: center;
      line-height: 1.2;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(13, 148, 136, 0.25);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 14px rgba(13, 148, 136, 0.35);
      transform: translateY(-1px);
    }

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

    .btn-outline:hover {
      background: var(--accent-soft);
      border-color: var(--primary-dark);
    }

    .btn-lg {
      padding: 13px 26px;
      font-size: 15px;
      border-radius: var(--radius-md);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 区域通用样式 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

    .section-bg-alt {
      background-color: var(--bg-alt);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 44px;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: var(--radius-full);
      margin-bottom: 10px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.35;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 HERO（禁止任何图片） */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(20, 184, 166, 0.15) 0%, rgba(2, 132, 199, 0.08) 35%, rgba(248, 250, 252, 0) 70%),
                  linear-gradient(180deg, #f0fdfa 0%, #f8fafc 100%);
      padding: 85px 0 65px;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content {
      text-align: left;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid rgba(20, 184, 166, 0.3);
      padding: 5px 14px;
      border-radius: var(--radius-full);
      font-size: 13px;
      color: var(--primary-dark);
      font-weight: 600;
      margin-bottom: 18px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      display: inline-block;
      box-shadow: 0 0 6px #10b981;
    }

    .hero-title {
      font-size: 36px;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight {
      background: linear-gradient(120deg, #0d9488 0%, #0284c7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 28px;
      line-height: 1.7;
    }

    .hero-btns {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 30px;
    }

    .hero-features-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px dashed var(--border-color);
      padding-top: 18px;
    }

    .hero-features-strip span {
      display: flex;
      align-items: center;
      gap: 5px;
      color: var(--text-main);
      font-weight: 500;
    }

    /* 首屏纯CSS科技数据卡片 */
    .hero-dashboard {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .dash-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 14px;
      margin-bottom: 16px;
    }

    .dash-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .dash-pill {
      font-size: 11px;
      padding: 2px 8px;
      border-radius: var(--radius-full);
      background: #ecfdf5;
      color: #059669;
      font-weight: 600;
    }

    .model-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 18px;
    }

    .model-tag-item {
      font-size: 12px;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      background: #f1f5f9;
      color: var(--text-main);
      border: 1px solid #e2e8f0;
      font-weight: 500;
    }

    .model-tag-item.hot {
      background: #f0fdfa;
      color: var(--primary-dark);
      border-color: #99f6e4;
      font-weight: 600;
    }

    .dash-metric-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin-bottom: 16px;
    }

    .dash-metric-card {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 12px;
      text-align: center;
    }

    .dash-metric-val {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary-dark);
      line-height: 1.2;
    }

    .dash-metric-label {
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    .dash-flow-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .dash-flow-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      font-size: 12px;
    }

    .dash-flow-name {
      font-weight: 600;
      color: var(--text-main);
    }

    .dash-flow-status {
      color: #0d9488;
      font-weight: 600;
    }

    /* 平台核心能力卡片 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #99f6e4;
    }

    .card-icon-box {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-md);
      background: var(--accent-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 14px;
      border: 1px solid rgba(20, 184, 166, 0.2);
    }

    .card-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .card-text {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 一站式创作场景细分网格 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 18px;
    }

    .scene-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 18px;
      transition: var(--transition);
    }

    .scene-item:hover {
      border-color: var(--accent);
      background: #fcffff;
      box-shadow: var(--shadow-md);
    }

    .scene-badge {
      font-size: 11px;
      font-weight: 600;
      color: var(--secondary);
      background: #e0f2fe;
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      display: inline-block;
      margin-bottom: 8px;
    }

    .scene-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .scene-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 素材与宣传展示区 */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 24px;
      align-items: center;
      margin-top: 30px;
    }

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

    .media-frame img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    .media-frame-caption {
      padding: 12px 16px;
      font-size: 13px;
      color: var(--text-muted);
      background: #ffffff;
      border-top: 1px solid var(--border-color);
    }

    .media-subgrid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    /* 对比评测板块 */
    .compare-section {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-lg);
    }

    .score-banner {
      background: linear-gradient(135deg, #0f766e 0%, #0d9488 100%);
      color: #ffffff;
      border-radius: var(--radius-md);
      padding: 20px 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      margin-bottom: 24px;
    }

    .score-left h3 {
      font-size: 20px;
      margin-bottom: 4px;
    }

    .score-left p {
      font-size: 13px;
      opacity: 0.9;
    }

    .score-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-number {
      font-size: 34px;
      font-weight: 800;
      color: #fef08a;
      line-height: 1;
    }

    .score-stars {
      color: #facc15;
      font-size: 18px;
      letter-spacing: 2px;
    }

    .table-container {
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .compare-table th,
    .compare-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-color);
    }

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

    .compare-table td.highlight-col {
      background: #f0fdfa;
      font-weight: 600;
      color: var(--primary-dark);
    }

    /* 标准流程时间线 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      position: relative;
    }

    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 12px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 需求匹配与表单 */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-lg);
      max-width: 820px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .form-group-full {
      grid-column: 1 / -1;
    }

    .form-label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 14px;
      background: #f8fafc;
      color: var(--text-main);
      font-family: inherit;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--border-focus);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
    }

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

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-quote {
      font-size: 13.5px;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .review-author-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 12px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .author-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-item.active {
      border-color: var(--accent);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 16px 20px;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary-dark);
      background: #f8fafc;
    }

    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #fcffff;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      border-top-color: #f1f5f9;
    }

    .faq-answer-inner {
      padding: 14px 20px 18px;
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 行业资讯与文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

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

    .article-meta {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
    }

    .article-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
      line-height: 1.4;
    }

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

    .article-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.55;
      margin-bottom: 12px;
      flex-grow: 1;
    }

    .article-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 联系我们与二维码 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      align-items: center;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 18px;
    }

    .contact-list li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .contact-label {
      font-weight: 700;
      color: var(--text-muted);
      min-width: 80px;
    }

    .qr-card-wrap {
      background: linear-gradient(135deg, #f0fdfa 0%, #e0f2fe 100%);
      border: 1px solid #99f6e4;
      border-radius: var(--radius-lg);
      padding: 28px;
      text-align: center;
      box-shadow: var(--shadow-md);
    }

    .qr-image-box {
      width: 170px;
      height: 170px;
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 8px;
      margin: 0 auto 14px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .qr-image-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    /* 加盟代理模块 */
    .agent-box {
      background: linear-gradient(135deg, #0f766e 0%, #115e59 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }

    .agent-box h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 12px;
      color: #ffffff;
    }

    .agent-box p {
      font-size: 14px;
      opacity: 0.9;
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .agent-benefits {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 20px;
    }

    .agent-benefit-item {
      background: rgba(255, 255, 255, 0.1);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 500;
    }

    /* 友情链接区 */
    .friend-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      margin-top: 40px;
      font-size: 13px;
    }

    .friend-links-title {
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      color: var(--text-muted);
    }

    .friend-links-list a:hover {
      color: var(--primary);
      text-decoration: underline;
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 30px;
      font-size: 13.5px;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr repeat(3, 1fr);
      gap: 30px;
      margin-bottom: 36px;
    }

    .footer-brand h4 {
      font-size: 18px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .footer-col h5 {
      font-size: 14px;
      font-weight: 700;
      color: #f8fafc;
      margin-bottom: 12px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-col ul li a {
      color: #94a3b8;
    }

    .footer-col ul li a:hover {
      color: #2dd4bf;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 12.5px;
    }

    /* 浮动工具栏 */
    .float-toolbar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-size: 13px;
      font-weight: 700;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-grid,
      .media-showcase-grid,
      .contact-grid,
      .agent-box {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .hero-title {
        font-size: 30px;
      }

      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }

      .nav-links.show {
        display: flex;
      }

      .nav-links li {
        width: 100%;
      }

      .nav-links li a {
        padding: 10px 0;
        width: 100%;
      }

      .mobile-menu-btn {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .section-wrap {
        padding: 50px 0;
      }

      .hero-title {
        font-size: 24px;
      }

      .form-grid {
        grid-template-columns: 1fr;
      }

      .media-subgrid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .score-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }