:root {
      --primary-rose: #e11d48;
      --primary-hover: #be123c;
      --accent-pink: #fda4af;
      --soft-pink: #fff1f2;
      --dark-text: #1e293b;
      --body-text: #475569;
      --light-text: #64748b;
      --bg-white: #ffffff;
      --bg-light: #fff5f6;
      --card-border: #ffe4e6;
      --border-color: #fecdd3;
      --max-width: 1200px;
      --shadow-sm: 0 4px 6px -1px rgba(225, 29, 72, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(225, 29, 72, 0.08), 0 8px 10px -6px rgba(225, 29, 72, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(225, 29, 72, 0.15);
      --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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--dark-text);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: radial-gradient(#fecdd3 0.75px, transparent 0.75px), radial-gradient(#ffe4e6 0.75px, var(--bg-light) 0.75px);
      background-size: 30px 30px;
      background-position: 0 0, 15px 15px;
    }

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

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

    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 16px;
      background: var(--soft-pink);
      color: var(--primary-rose);
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 12px;
      border: 1px solid var(--border-color);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--dark-text);
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--body-text);
      line-height: 1.6;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

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

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

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--dark-text);
      padding: 8px 12px;
      border-radius: 6px;
      display: block;
    }

    .nav-links li a:hover {
      color: var(--primary-rose);
      background: var(--soft-pink);
    }

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

    .btn-nav-primary {
      background: linear-gradient(135deg, var(--primary-rose), #f43f5e);
      color: #ffffff !important;
      padding: 10px 20px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(225, 29, 72, 0.25);
    }

    .btn-nav-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--primary-rose));
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(225, 29, 72, 0.35);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--primary-rose);
      cursor: pointer;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 90px 0 70px 0;
      background: linear-gradient(180deg, #fff0f3 0%, var(--bg-light) 100%);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 9999px;
      font-size: 0.9rem;
      color: var(--primary-rose);
      font-weight: 700;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      color: var(--dark-text);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary-rose) 0%, #be123c 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.18rem;
      color: var(--body-text);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-main-official {
      background: linear-gradient(135deg, #e11d48 0%, #f43f5e 100%);
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 700;
      padding: 16px 36px;
      border-radius: 12px;
      box-shadow: 0 8px 24px rgba(225, 29, 72, 0.35);
      border: 1px solid #fda4af;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main-official:hover {
      background: linear-gradient(135deg, #be123c 0%, #e11d48 100%);
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(225, 29, 72, 0.45);
    }

    .btn-secondary {
      background: #ffffff;
      color: var(--dark-text);
      font-size: 1.1rem;
      font-weight: 700;
      padding: 16px 32px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-secondary:hover {
      border-color: var(--primary-rose);
      color: var(--primary-rose);
      background: var(--soft-pink);
    }

    /* 亮点指标 */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .stat-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-rose);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-rose);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--body-text);
      font-weight: 600;
    }

    /* 模型矩阵标签 */
    .models-marquee-wrap {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-top: 40px;
      text-align: center;
    }

    .models-marquee-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--light-text);
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }

    .models-pill-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-pill {
      background: var(--soft-pink);
      color: var(--dark-text);
      padding: 6px 14px;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .model-pill:hover {
      background: var(--primary-rose);
      color: #ffffff;
      border-color: var(--primary-rose);
      transform: scale(1.05);
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .feature-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-rose);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      background: var(--soft-pink);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: var(--primary-rose);
      margin-bottom: 18px;
      border: 1px solid var(--border-color);
    }

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

    .feature-card p {
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-footer-tags {
      margin-top: 16px;
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .mini-badge {
      font-size: 0.75rem;
      padding: 3px 8px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 4px;
      color: var(--light-text);
      font-weight: 500;
    }

    /* 媒体展示与图文卡片 */
    .media-card {
      background: #ffffff;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #f1f5f9;
    }

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

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

    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }

    .media-body {
      padding: 24px;
    }

    .media-body h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

    .media-body p {
      font-size: 0.92rem;
      color: var(--body-text);
      line-height: 1.6;
    }

    /* 流程步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border-radius: 16px;
      padding: 30px 20px;
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 42px;
      height: 42px;
      background: var(--primary-rose);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin: 0 auto 16px auto;
      font-size: 1.1rem;
      box-shadow: 0 4px 10px rgba(225, 29, 72, 0.3);
    }

    .step-item h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.88rem;
      color: var(--body-text);
    }

    /* 对比表格 */
    .comparison-container {
      background: #ffffff;
      border-radius: 20px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      padding: 30px;
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, var(--soft-pink) 0%, #ffffff 100%);
      padding: 24px 30px;
      border-radius: 14px;
      border: 1px solid var(--border-color);
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-left h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--primary-rose);
    }

    .score-left p {
      font-size: 0.95rem;
      color: var(--body-text);
      font-weight: 500;
    }

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

    .rating-stars {
      color: #f59e0b;
      font-size: 1.5rem;
      letter-spacing: 2px;
    }

    .score-box {
      background: var(--primary-rose);
      color: #ffffff;
      padding: 8px 18px;
      border-radius: 10px;
      font-weight: 800;
      font-size: 1.3rem;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

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

    .custom-table th,
    .custom-table td {
      padding: 18px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 0.95rem;
    }

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

    .custom-table td.highlight {
      color: var(--primary-rose);
      font-weight: 700;
      background: rgba(254, 205, 211, 0.15);
    }

    /* 用户评论 */
    .testimonial-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 26px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .user-info-row {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    .user-avatar-initial {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, var(--primary-rose), #fb7185);
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
    }

    .user-meta h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark-text);
    }

    .user-meta span {
      font-size: 0.8rem;
      color: var(--light-text);
    }

    /* FAQ 折叠 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

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

    .faq-header:hover {
      color: var(--primary-rose);
      background: var(--soft-pink);
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary-rose);
      transition: transform 0.3s ease;
    }

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

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

    .faq-item.active .faq-body {
      padding: 0 24px 22px 24px;
      max-height: 400px;
    }

    /* 文章与资讯 */
    .article-item-card {
      background: #ffffff;
      border-radius: 14px;
      padding: 22px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item-card:hover {
      border-color: var(--primary-rose);
      transform: translateY(-3px);
    }

    .article-item-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .article-item-card a {
      color: var(--primary-rose);
      font-size: 0.88rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 需求表单与联系 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 36px;
      background: #ffffff;
      border-radius: 20px;
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      font-size: 0.95rem;
      color: var(--dark-text);
      outline: none;
      background: #ffffff;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary-rose);
      box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.12);
    }

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

    .btn-submit-form {
      background: linear-gradient(135deg, var(--primary-rose), #f43f5e);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: 10px;
      border: none;
      cursor: pointer;
      width: 100%;
      box-shadow: 0 4px 14px rgba(225, 29, 72, 0.3);
      transition: var(--transition);
    }

    .btn-submit-form:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--primary-rose));
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(225, 29, 72, 0.4);
    }

    .contact-info-panel {
      background: var(--soft-pink);
      border-radius: 16px;
      padding: 30px;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .contact-info-list li {
      margin-bottom: 16px;
      font-size: 0.95rem;
      color: var(--dark-text);
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }

    .contact-info-list li strong {
      color: var(--primary-rose);
      min-width: 90px;
    }

    .qr-container {
      text-align: center;
      background: #ffffff;
      padding: 20px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
    }

    .qr-container img {
      max-width: 140px;
      height: auto;
      border-radius: 8px;
      margin: 0 auto 10px auto;
      display: block;
    }

    .qr-container p {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--dark-text);
    }

    /* 宣传图画廊 */
    .banner-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    .banner-item {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .banner-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      aspect-ratio: 16/10;
      transition: transform 0.4s ease;
    }

    .banner-item:hover img {
      transform: scale(1.05);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px 0;
      color: var(--body-text);
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 16px;
    }

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

    .footer-col ul li {
      margin-bottom: 10px;
      font-size: 0.9rem;
    }

    .footer-col ul li a:hover {
      color: var(--primary-rose);
    }

    .friend-links-box {
      border-top: 1px solid #f1f5f9;
      padding-top: 24px;
      margin-bottom: 30px;
    }

    .friend-links-box h5 {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--light-text);
      margin-bottom: 12px;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .friend-links-flex a {
      font-size: 0.88rem;
      color: var(--body-text);
      background: var(--bg-light);
      padding: 4px 12px;
      border-radius: 6px;
      border: 1px solid var(--border-color);
    }

    .friend-links-flex a:hover {
      color: var(--primary-rose);
      border-color: var(--primary-rose);
      background: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #f1f5f9;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--light-text);
    }

    /* 悬浮工具栏 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-rose);
      box-shadow: var(--shadow-md);
      cursor: pointer;
      transition: var(--transition);
      font-size: 1.2rem;
    }

    .floating-btn:hover {
      background: var(--primary-rose);
      color: #ffffff;
      transform: scale(1.1);
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .hero-title {
        font-size: 2.3rem;
      }
      .hero-stats-grid,
      .flow-steps,
      .grid-4,
      .banner-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links,
      .nav-action-btns {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        gap: 8px;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-desc {
        font-size: 1rem;
      }
      .hero-stats-grid,
      .flow-steps,
      .grid-3,
      .grid-4,
      .grid-2,
      .banner-grid,
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.7rem;
      }
      .score-banner {
        flex-direction: column;
        text-align: center;
      }
      .score-right {
        flex-direction: column;
      }
    }