:root {
      --primary-red: #d9232e;
      --deep-red: #ab111a;
      --light-red: #fff1f0;
      --red-hover: #fa3844;
      --accent-coral: #ff5e57;
      --text-main: #1e293b;
      --text-muted: #596780;
      --text-light: #8c9ba5;
      --bg-light: #faf7f7;
      --bg-white: #ffffff;
      --border-color: #fee2e2;
      --card-shadow: 0 10px 30px rgba(217, 35, 46, 0.06);
      --card-shadow-hover: 0 16px 36px rgba(217, 35, 46, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.28s ease;
    }

    * {
      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", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.68;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 12px rgba(217, 35, 46, 0.04);
    }

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

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

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

    .brand-tag {
      font-size: 13px;
      background: var(--light-red);
      color: var(--primary-red);
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 20px;
      border: 1px solid rgba(217, 35, 46, 0.2);
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 10px 14px;
      font-size: 14.5px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
    }

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

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

    .btn-red {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: linear-gradient(135deg, var(--accent-coral), var(--primary-red));
      color: #ffffff;
      font-size: 14.5px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(217, 35, 46, 0.28);
      transition: var(--transition);
      text-decoration: none;
    }

    .btn-red:hover {
      background: linear-gradient(135deg, var(--primary-red), var(--deep-red));
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(217, 35, 46, 0.38);
      color: #ffffff;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      background: #ffffff;
      color: var(--primary-red);
      font-size: 14.5px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1.5px solid var(--primary-red);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-outline:hover {
      background: var(--light-red);
      color: var(--deep-red);
    }

    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
      padding: 6px;
    }

    /* 首屏 Hero 区域 (严禁出现图片，采用现代科技感几何渐变排版) */
    .hero-section {
      position: relative;
      padding: 80px 0 60px;
      background: radial-gradient(circle at 10% 20%, #fff5f5 0%, #faf7f7 50%, #fef2f2 100%);
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-bg-elem {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      pointer-events: none;
      opacity: 0.55;
    }
    .hero-bg-elem-1 {
      width: 420px;
      height: 420px;
      background: #ffccd0;
      top: -100px;
      right: -80px;
    }
    .hero-bg-elem-2 {
      width: 320px;
      height: 320px;
      background: #ffe3d1;
      bottom: -80px;
      left: 5%;
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid #fecaca;
      border-radius: 30px;
      font-size: 13.5px;
      color: var(--primary-red);
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 4px 12px rgba(217, 35, 46, 0.08);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background: var(--primary-red);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(217, 35, 46, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(217, 35, 46, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(217, 35, 46, 0); }
    }

    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      color: #0f172a;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }

    .hero-title span {
      background: linear-gradient(120deg, var(--deep-red) 0%, var(--primary-red) 60%, var(--accent-coral) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 17.5px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.75;
    }

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

    .btn-hero-main {
      padding: 14px 34px;
      font-size: 16.5px;
      border-radius: 8px;
    }

    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 10px;
    }

    .hero-stat-card {
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      text-align: center;
    }

    .hero-stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: #fca5a5;
    }

    .stat-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-red);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 13.5px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Section 通用头 */
    .section-wrap {
      padding: 76px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-red);
      background: var(--light-red);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: #0f172a;
      line-height: 1.35;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 15.5px;
      color: var(--text-muted);
      line-height: 1.68;
    }

    /* 平台介绍 & 核心卖点 */
    .platform-intro-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .platform-intro-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
    }

    .intro-feature-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .intro-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14.5px;
      color: var(--text-main);
    }

    .feature-icon-bullet {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: var(--light-red);
      color: var(--primary-red);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 12px;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .intro-graphic-card {
      background: linear-gradient(145deg, #ffffff 0%, #fff7f7 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--card-shadow);
    }

    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid #fee2e2;
      color: #334155;
      font-size: 13px;
      padding: 6px 12px;
      border-radius: 6px;
      font-weight: 500;
      box-shadow: 0 1px 3px rgba(0,0,0,0.02);
      transition: var(--transition);
    }

    .model-chip:hover {
      border-color: var(--primary-red);
      color: var(--primary-red);
      transform: translateY(-2px);
    }

    /* 一站式创作服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
      border-color: #fca5a5;
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--light-red), #fee2e2);
      color: var(--primary-red);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .service-badge-row {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 16px;
    }

    .badge-pill {
      font-size: 12px;
      padding: 2px 8px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 4px;
      color: #475569;
    }

    /* 对比评测表格与评分卡 */
    .review-score-banner {
      background: linear-gradient(135deg, #fff5f5, #ffffff);
      border: 2px solid #fecaca;
      border-radius: var(--radius-lg);
      padding: 30px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 36px;
      box-shadow: var(--card-shadow);
    }

    .score-main-info h3 {
      font-size: 24px;
      color: #0f172a;
      margin-bottom: 6px;
    }

    .score-highlight {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }

    .score-big {
      font-size: 48px;
      font-weight: 900;
      color: var(--primary-red);
      line-height: 1;
    }

    .score-max {
      font-size: 18px;
      color: var(--text-light);
    }

    .score-stars {
      color: #f59e0b;
      font-size: 22px;
      letter-spacing: 2px;
    }

    .comparison-table-wrapper {
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--card-shadow);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .comparison-table th, 
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 14.5px;
    }

    .comparison-table th {
      background: #fff8f8;
      color: #0f172a;
      font-weight: 700;
    }

    .comparison-table tr:hover td {
      background: #fffdfd;
    }

    .td-highlight {
      color: var(--primary-red);
      font-weight: 600;
      background: #fff5f5;
    }

    /* 案例中心与展示图 */
    .case-media-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

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

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

    .case-img-wrap {
      position: relative;
      background: #f8fafc;
      overflow: hidden;
      aspect-ratio: 16 / 9;
    }

    .case-img-wrap.square-ratio {
      aspect-ratio: 1 / 1;
    }

    .case-card-body {
      padding: 20px;
    }

    .case-card-body h4 {
      font-size: 16.5px;
      color: #0f172a;
      margin-bottom: 8px;
    }

    .case-card-body p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Token 比价 */
    .token-pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pricing-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      position: relative;
    }

    .pricing-card.featured {
      border: 2px solid var(--primary-red);
      box-shadow: 0 12px 36px rgba(217, 35, 46, 0.14);
      transform: scale(1.02);
    }

    .pricing-card.featured:hover {
      transform: scale(1.02) translateY(-4px);
    }

    .pricing-ribbon {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(135deg, var(--accent-coral), var(--primary-red));
      color: #ffffff;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 12px;
      box-shadow: 0 2px 8px rgba(217, 35, 46, 0.25);
    }

    .pricing-price {
      font-size: 34px;
      font-weight: 800;
      color: var(--primary-red);
      margin: 16px 0 6px;
    }

    .pricing-price span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: normal;
    }

    .pricing-features {
      list-style: none;
      text-align: left;
      margin: 20px 0 24px;
      font-size: 14px;
      color: #334155;
    }

    .pricing-features li {
      padding: 7px 0;
      border-bottom: 1px dashed #f1f5f9;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .check-mark {
      color: #10b981;
      font-weight: bold;
    }

    /* 标准流程与时间线 */
    .steps-timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-num-badge {
      width: 36px;
      height: 36px;
      background: var(--primary-red);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      margin-bottom: 16px;
    }

    .step-item-card h4 {
      font-size: 16.5px;
      color: #0f172a;
      margin-bottom: 8px;
    }

    .step-item-card p {
      font-size: 13.5px;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .testi-content {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 18px;
      font-style: normal;
    }

    .testi-author-box {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f8fafc;
      padding-top: 12px;
    }

    .testi-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #fecaca, #fee2e2);
      color: var(--primary-red);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

    .testi-name {
      font-size: 14.5px;
      font-weight: 600;
      color: #0f172a;
    }

    .testi-role {
      font-size: 12.5px;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-container {
      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-sm);
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }

    .faq-question {
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 15.5px;
      font-weight: 600;
      color: #0f172a;
      transition: var(--transition);
      background: #ffffff;
    }

    .faq-question:hover {
      background: #fff8f8;
      color: var(--primary-red);
    }

    .faq-arrow {
      font-size: 18px;
      color: var(--text-light);
      transition: transform 0.28s ease;
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
      color: var(--primary-red);
    }

    .faq-answer {
      display: none;
      padding: 0 22px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid #fff1f0;
      background: #ffffff;
    }

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

    /* 需求匹配与联系表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--card-shadow);
    }

    .contact-info-col h3 {
      font-size: 22px;
      color: #0f172a;
      margin-bottom: 16px;
    }

    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      font-size: 14.5px;
      color: #334155;
    }

    .contact-qr-box {
      margin-top: 24px;
      padding: 16px;
      background: #fff8f8;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      display: inline-block;
      text-align: center;
    }

    .contact-qr-box img {
      width: 140px;
      height: 140px;
      margin: 0 auto 8px;
      border-radius: 6px;
    }

    .contact-qr-box span {
      font-size: 12.5px;
      color: var(--text-muted);
      display: block;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: #1e293b;
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 14.5px;
      color: #0f172a;
      background: #f8fafc;
      transition: var(--transition);
      outline: none;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary-red);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(217, 35, 46, 0.12);
    }

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

    /* 文章资讯与百科 */
    .articles-list-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--card-shadow);
      margin-bottom: 24px;
    }

    .article-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid #f1f5f9;
      font-size: 14.5px;
    }

    .article-link-item:last-child {
      border-bottom: none;
    }

    .article-link-item a {
      color: #334155;
      font-weight: 500;
    }

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

    .article-date {
      font-size: 13px;
      color: var(--text-light);
    }

    /* 友情链接与页脚 */
    .friend-links-bar {
      padding: 28px 0;
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .friend-links-content {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13.5px;
      color: var(--text-muted);
    }

    .friend-links-content a {
      color: #475569;
      padding: 3px 8px;
      background: #f8fafc;
      border-radius: 4px;
      border: 1px solid #e2e8f0;
    }

    .friend-links-content a:hover {
      color: var(--primary-red);
      border-color: #fca5a5;
    }

    .footer-section {
      background: #1e242b;
      color: #cbd5e1;
      padding: 48px 0 28px;
    }

    .footer-inner {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-col p {
      font-size: 13.5px;
      color: #94a3b8;
      line-height: 1.8;
      margin-bottom: 8px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 8px;
      font-size: 13.5px;
    }

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

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

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    .ai-page-home-link {
      color: var(--primary-red);
      font-weight: 600;
    }

    /* 悬浮客服与回到顶部 */
    .float-toolbar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 990;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: 0 4px 16px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-red);
      font-size: 20px;
      cursor: pointer;
      transition: var(--transition);
      position: relative;
    }

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

    .float-qr-popover {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 12px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.15);
      width: 150px;
      text-align: center;
      display: none;
      pointer-events: none;
    }

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

    .float-qr-popover img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      margin-bottom: 4px;
    }

    .float-qr-popover span {
      font-size: 12px;
      color: var(--text-main);
      display: block;
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .hero-stats-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .platform-intro-grid,
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .services-grid,
      .token-pricing-grid,
      .testimonials-grid,
      .case-media-grid {
        grid-template-columns: 1fr 1fr;
      }
      .steps-timeline-grid {
        grid-template-columns: 1fr 1fr;
      }
      .footer-inner {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-action {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.06);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid #f8fafc;
      }
      .hero-section {
        padding: 48px 0 40px;
      }
      .hero-title {
        font-size: 26px;
      }
      .hero-desc {
        font-size: 15px;
      }
      .services-grid,
      .token-pricing-grid,
      .testimonials-grid,
      .case-media-grid,
      .steps-timeline-grid {
        grid-template-columns: 1fr;
      }
      .review-score-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
      .intro-feature-list {
        grid-template-columns: 1fr;
      }
    }