:root {
      --primary: #4f46e5;
      --primary-light: #818cf8;
      --secondary: #06b6d4;
      --accent: #d946ef;
      --laser-grad: linear-gradient(135deg, rgba(238, 242, 255, 0.95) 0%, rgba(245, 238, 255, 0.95) 50%, rgba(224, 247, 250, 0.95) 100%);
      --laser-border: linear-gradient(135deg, #c7d2fe, #fbcfe8, #a5f3fc);
      --dark-text: #1e1b4b;
      --body-text: #334155;
      --muted-text: #64748b;
      --card-bg: rgba(255, 255, 255, 0.85);
      --card-border: rgba(226, 232, 240, 0.8);
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(99, 102, 241, 0.08), 0 4px 6px -4px rgba(99, 102, 241, 0.04);
      --shadow-laser: 0 12px 30px -5px rgba(217, 70, 239, 0.12), 0 4px 10px -2px rgba(6, 182, 212, 0.1);
      --radius: 16px;
      --transition: all 0.3s 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, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--body-text);
      background-color: #f8fafc;
      background-image: 
        radial-gradient(at 0% 0%, rgba(224, 231, 255, 0.5) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(252, 231, 243, 0.5) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(207, 250, 254, 0.3) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(243, 232, 255, 0.4) 0px, transparent 50%);
      background-attachment: fixed;
      line-height: 1.6;
      overflow-x: hidden;
    }

    .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: 100;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

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

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(135deg, #4338ca, #d946ef);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      text-decoration: none;
      color: var(--dark-text);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: 8px;
      transition: var(--transition);
      display: inline-block;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.06);
    }

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

    .btn-nav-primary {
      padding: 9px 18px;
      border-radius: 9999px;
      background: linear-gradient(135deg, #6366f1, #a855f7);
      color: #ffffff;
      font-weight: 600;
      font-size: 0.9rem;
      text-decoration: none;
      box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
      transition: var(--transition);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-nav-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(168, 85, 247, 0.35);
    }

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

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 9999px;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      font-size: 1rem;
      border: 1px solid transparent;
    }

    .btn-laser {
      background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #db2777 100%);
      color: #ffffff;
      box-shadow: 0 8px 20px rgba(124, 58, 237, 0.3);
    }

    .btn-laser:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 26px rgba(219, 39, 119, 0.35);
      color: #ffffff;
    }

    .btn-outline {
      background: rgba(255, 255, 255, 0.8);
      border-color: #c7d2fe;
      color: var(--primary);
      backdrop-filter: blur(4px);
    }

    .btn-outline:hover {
      background: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    /* 首屏 Hero 区 (严格无图片) */
    .hero-section {
      padding: 70px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 9999px;
      background: linear-gradient(90deg, rgba(238, 242, 255, 0.8), rgba(250, 232, 255, 0.8));
      border: 1px solid rgba(199, 210, 254, 0.8);
      color: #4338ca;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
    }

    .hero-title {
      font-size: clamp(2rem, 4vw, 3.1rem);
      font-weight: 800;
      line-height: 1.25;
      color: var(--dark-text);
      max-width: 880px;
      margin: 0 auto 20px;
      letter-spacing: -0.5px;
    }

    .hero-title-highlight {
      background: linear-gradient(135deg, #3730a3, #7c3aed 40%, #db2777 80%, #0891b2);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.125rem;
      color: var(--muted-text);
      max-width: 720px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    /* 顶尖模型支撑跑马灯/网格卡 */
    .models-pill-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 980px;
      margin: 0 auto;
      padding: 16px 20px;
      background: rgba(255, 255, 255, 0.6);
      border-radius: var(--radius);
      border: 1px solid rgba(226, 232, 240, 0.9);
      backdrop-filter: blur(8px);
    }

    .model-tag {
      font-size: 0.8rem;
      font-weight: 600;
      padding: 5px 12px;
      border-radius: 6px;
      background: #ffffff;
      color: #334155;
      border: 1px solid #e2e8f0;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: #a5b4fc;
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* 统计指标卡 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      margin-top: 50px;
    }

    .stat-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
      transition: var(--transition);
    }

    .stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, #6366f1, #ec4899, #06b6d4);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-laser);
      border-color: #cbd5e1;
    }

    .stat-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 6px;
      background: linear-gradient(135deg, #1e1b4b, #4338ca);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--muted-text);
      font-weight: 500;
    }

    /* 公共 Section 布局 */
    .section-block {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 50px;
    }

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--primary);
      margin-bottom: 8px;
      display: inline-block;
      padding: 4px 12px;
      background: rgba(99, 102, 241, 0.08);
      border-radius: 9999px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* 平台核心介绍卡片 */
    .intro-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .intro-item {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }

    .intro-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-laser);
      border-color: #c4b5fd;
    }

    .intro-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(217, 70, 239, 0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
      font-weight: 700;
      font-size: 1.2rem;
    }

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

    .intro-desc {
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.6;
    }

    /* 服务能力卡片 (多场景) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      border-color: #a78bfa;
      transform: translateY(-3px);
      box-shadow: 0 10px 20px -3px rgba(139, 92, 246, 0.12);
    }

    .service-badge {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 8px;
      border-radius: 4px;
      background: #ede9fe;
      color: #6d28d9;
      margin-bottom: 12px;
    }

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

    .service-text {
      font-size: 0.9rem;
      color: var(--body-text);
      line-height: 1.55;
      margin-bottom: 16px;
    }

    .service-tag-line {
      font-size: 0.8rem;
      color: var(--muted-text);
      border-top: 1px dashed #f1f5f9;
      padding-top: 10px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 案例展示区带真实图片 */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .showcase-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid #e2e8f0;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .showcase-img-wrap {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: #f1f5f9;
      position: relative;
    }

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

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

    .showcase-content {
      padding: 20px;
    }

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

    .showcase-desc {
      font-size: 0.875rem;
      color: var(--muted-text);
      line-height: 1.5;
    }

    /* 对比评测表格 */
    .compare-container {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
      padding: 20px;
    }

    .compare-score-hero {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      background: linear-gradient(135deg, rgba(238, 242, 255, 0.7), rgba(253, 242, 248, 0.7));
      border: 1px solid #c7d2fe;
      border-radius: 12px;
      padding: 24px 30px;
      margin-bottom: 24px;
    }

    .score-left h4 {
      font-size: 1.3rem;
      color: var(--dark-text);
      font-weight: 800;
      margin-bottom: 4px;
    }

    .score-left p {
      font-size: 0.9rem;
      color: var(--muted-text);
    }

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

    .score-number {
      font-size: 2.8rem;
      font-weight: 900;
      color: #4338ca;
      line-height: 1;
    }

    .score-rating {
      font-size: 0.9rem;
      color: #4b5563;
      font-weight: 600;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 600px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      text-align: left;
      font-size: 0.95rem;
      border-bottom: 1px solid #f1f5f9;
    }

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

    .compare-table tr:hover td {
      background: #faf5ff;
    }

    .compare-table .highlight-col {
      background: rgba(238, 242, 255, 0.5);
      font-weight: 600;
      color: #3730a3;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 24px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
      transition: var(--transition);
    }

    .step-card:hover {
      border-color: #818cf8;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4f46e5, #06b6d4);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.875rem;
      color: var(--muted-text);
      line-height: 1.5;
    }

    /* 用户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .review-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #c7d2fe;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }

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

    .author-avatar-text {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #e0e7ff, #fce7f3);
      color: #4338ca;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .author-info h4 {
      font-size: 0.95rem;
      color: var(--dark-text);
      font-weight: 700;
    }

    .author-info p {
      font-size: 0.8rem;
      color: var(--muted-text);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 700;
      color: var(--dark-text);
      user-select: none;
      background: #ffffff;
      transition: background 0.2s;
    }

    .faq-question:hover {
      background: #f8fafc;
    }

    .faq-icon-cross {
      font-size: 1.25rem;
      font-weight: 300;
      color: var(--primary);
      transition: transform 0.3s;
    }

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

    .faq-answer {
      display: none;
      padding: 0 24px 18px;
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.6;
      border-top: 1px solid #f1f5f9;
      background: #fafafa;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* 需求匹配与表单板块 */
    .form-wrapper {
      max-width: 800px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-laser);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

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

    .form-label {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--dark-text);
    }

    .form-control {
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid #cbd5e1;
      font-size: 0.95rem;
      color: var(--dark-text);
      outline: none;
      transition: var(--transition);
      background: #f8fafc;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }

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

    /* 文章与资讯 */
    .article-wrap {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius);
      padding: 20px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item:hover {
      border-color: #818cf8;
      box-shadow: var(--shadow-sm);
    }

    .article-item a {
      text-decoration: none;
      color: var(--dark-text);
      font-weight: 700;
      font-size: 1rem;
      line-height: 1.45;
      margin-bottom: 8px;
      display: block;
      transition: color 0.2s;
    }

    .article-item a:hover {
      color: var(--primary);
    }

    .article-meta {
      font-size: 0.8rem;
      color: var(--muted-text);
    }

    /* 宣传展示条 */
    .banner-promo-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 40px;
    }

    .banner-promo-row img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    /* 友情链接与底部导航 */
    .friendly-links-card {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 24px;
      border: 1px solid #e2e8f0;
      margin-top: 30px;
    }

    .friendly-links-card h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 12px;
    }

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

    .links-tags a {
      color: #4b5563;
      text-decoration: none;
      font-size: 0.875rem;
      padding: 4px 10px;
      background: #f8fafc;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }

    .links-tags a:hover {
      color: var(--primary);
      border-color: #c7d2fe;
      background: #ffffff;
    }

    /* 页脚 */
    .site-footer {
      background: #111827;
      color: #9ca3af;
      padding: 60px 0 30px;
      margin-top: 80px;
      font-size: 0.9rem;
    }

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

    .footer-brand h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #f3f4f6;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #9ca3af;
      text-decoration: none;
      transition: color 0.2s;
    }

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

    .footer-qr-wrap {
      display: flex;
      flex-direction: column;
      gap: 10px;
      align-items: flex-start;
    }

    .footer-qr-wrap img {
      width: 105px;
      height: 105px;
      border-radius: 8px;
      background: #ffffff;
      padding: 4px;
    }

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #6b7280;
    }

    /* 浮动客服挂件 */
    .floating-kefu {
      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;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
      border: 1px solid #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      text-decoration: none;
      cursor: pointer;
      position: relative;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
      color: #4338ca;
    }

    .float-qr-pop {
      display: none;
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 12px;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
      border: 1px solid #e2e8f0;
      width: 140px;
      text-align: center;
    }

    .float-qr-pop img {
      width: 100%;
      height: auto;
      border-radius: 6px;
    }

    .float-btn:hover .float-qr-pop {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .banner-promo-row {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid #e2e8f0;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 12px 16px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-section {
        padding: 40px 0;
      }
      .form-wrapper {
        padding: 24px;
      }
    }