/* ==========================================================================
       镭射幻彩风格全局浅色体系 (Holographic Iridescent Light Theme)
       ========================================================================== */
    :root {
      --bg-main: #f7f9fd;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      
      /* 幻彩光泽与点缀渐变 */
      --hologram-gradient: linear-gradient(135deg, #ff80b5 0%, #9089fc 50%, #4facfe 100%);
      --hologram-subtle: linear-gradient(135deg, rgba(255,128,181,0.08) 0%, rgba(144,137,252,0.08) 50%, rgba(79,172,254,0.08) 100%);
      --hologram-border: linear-gradient(135deg, rgba(255, 128, 181, 0.4), rgba(144, 137, 252, 0.4), rgba(79, 172, 254, 0.4));
      --brand-primary: #4f46e5;
      --brand-secondary: #0284c7;
      
      --card-bg: rgba(255, 255, 255, 0.92);
      --card-border: rgba(226, 232, 240, 0.85);
      --shadow-sm: 0 2px 8px rgba(99, 102, 241, 0.05);
      --shadow-md: 0 8px 24px -4px rgba(99, 102, 241, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 16px 36px -6px rgba(99, 102, 241, 0.12), 0 4px 12px -2px rgba(0, 0, 0, 0.05);
      
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-max: 1200px;
    }

    * {
      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-main);
      background-image: 
        radial-gradient(at 10% 15%, rgba(255, 182, 193, 0.35) 0px, transparent 50%),
        radial-gradient(at 90% 25%, rgba(186, 230, 253, 0.45) 0px, transparent 55%),
        radial-gradient(at 50% 60%, rgba(233, 213, 255, 0.35) 0px, transparent 60%),
        radial-gradient(at 80% 90%, rgba(254, 215, 170, 0.3) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    /* 统一居中容器体系 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 全局排版与标签 */
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s ease, transform 0.2s ease;
    }

    .badge-holo {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      background: var(--hologram-subtle);
      border: 1px solid rgba(144, 137, 252, 0.3);
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--brand-primary);
      box-shadow: 0 2px 10px rgba(144, 137, 252, 0.1);
      margin-bottom: 12px;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 按钮通用体系 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      text-align: center;
    }

    .btn-holo {
      background: var(--hologram-gradient);
      color: #ffffff;
      box-shadow: 0 4px 18px rgba(144, 137, 252, 0.35);
      position: relative;
      overflow: hidden;
    }

    .btn-holo:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 24px rgba(144, 137, 252, 0.5);
    }

    .btn-outline {
      background: rgba(255, 255, 255, 0.85);
      color: var(--text-main);
      border: 1px solid rgba(144, 137, 252, 0.4);
      backdrop-filter: blur(8px);
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      transition: background 0.3s ease;
    }

    .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: 38px;
      width: auto;
      object-fit: contain;
      display: block;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: block;
    }

    .nav-links li a:hover,
    .ai-page-home-link:hover {
      color: var(--brand-primary);
      background: rgba(144, 137, 252, 0.08);
    }

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

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

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 6px;
    }

    /* 区域通用间距 */
    section {
      padding: 70px 0;
      position: relative;
    }

    /* Hero 首屏 - 纯文字/几何/渐变/无图片 */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-container {
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-h1 {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 900;
      color: #0b132b;
      margin-bottom: 20px;
      letter-spacing: -0.03em;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

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

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

    .stat-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      padding: 22px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(144, 137, 252, 0.4);
    }

    .stat-number {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--brand-primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 多模型生态展示条 */
    .model-marquee-box {
      margin-top: 40px;
      padding: 24px;
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      backdrop-filter: blur(10px);
    }

    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 14px;
    }

    .model-chip {
      background: #ffffff;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--text-main);
      border: 1px solid rgba(144, 137, 252, 0.25);
      box-shadow: 0 1px 4px rgba(0,0,0,0.03);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      border-color: var(--brand-primary);
      background: var(--hologram-subtle);
      transform: translateY(-2px);
    }

    /* 卡片网格体系 */
    .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: 28px;
    }

    .holo-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .holo-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(144, 137, 252, 0.5);
    }

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: var(--hologram-subtle);
      border: 1px solid rgba(144, 137, 252, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--brand-primary);
      margin-bottom: 18px;
    }

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

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-footer-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 16px;
      padding-top: 14px;
      border-top: 1px dashed rgba(226, 232, 240, 0.9);
    }

    .tag-sm {
      font-size: 0.75rem;
      background: rgba(241, 245, 249, 0.9);
      color: var(--text-muted);
      padding: 2px 8px;
      border-radius: 4px;
    }

    /* 流程时间线组件 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-badge {
      width: 32px;
      height: 32px;
      border-radius: var(--radius-full);
      background: var(--brand-primary);
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
      margin-bottom: 14px;
    }

    /* 对比评测表格板块 */
    .rating-banner {
      background: linear-gradient(135deg, #ffffff 0%, rgba(245, 243, 255, 0.9) 100%);
      border: 1px solid rgba(144, 137, 252, 0.4);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: var(--shadow-md);
    }

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

    .score-val {
      font-size: 3rem;
      font-weight: 900;
      color: var(--brand-primary);
      line-height: 1;
    }

    .stars-text {
      color: #f59e0b;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }

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

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

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

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

    .highlight-cell {
      background: rgba(238, 242, 255, 0.45);
      font-weight: 600;
      color: var(--brand-primary);
    }

    /* 案例图片展示容器 */
    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--card-border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .media-container {
      width: 100%;
      overflow: hidden;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-container img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover img {
      transform: scale(1.03);
    }

    .media-content {
      padding: 20px;
      flex-grow: 1;
    }

    /* 宣传图画廊 */
    .banner-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

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

    .ai-page-image {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 用户评论卡片 */
    .review-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .user-avatar-char {
      width: 42px;
      height: 42px;
      border-radius: var(--radius-full);
      background: var(--hologram-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .user-meta h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .review-body {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 12px;
    }

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

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

    .faq-item.active {
      border-color: rgba(144, 137, 252, 0.6);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1.02rem;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      font-weight: 400;
      color: var(--brand-primary);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 0.93rem;
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
      max-height: 300px;
    }

    /* 文章列表 */
    .articles-wrapper {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .article-links-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 16px;
      list-style: none;
    }

    .article-links-list li a {
      font-size: 0.9rem;
      color: var(--text-muted);
      display: block;
      padding: 10px 14px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--brand-primary);
      transition: all 0.2s ease;
      word-break: break-all;
    }

    .article-links-list li a:hover {
      background: rgba(144, 137, 252, 0.08);
      color: var(--brand-primary);
      padding-left: 18px;
    }

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

    .contact-info-col h3 {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--text-main);
    }

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

    .method-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .method-icon {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--hologram-subtle);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-primary);
      font-weight: bold;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: #f8fafc;
      border-radius: var(--radius-md);
      border: 1px solid #e2e8f0;
      max-width: 280px;
    }

    .qr-container img {
      width: 80px;
      height: 80px;
      object-fit: contain;
      border-radius: 4px;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #ffffff;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--brand-primary);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid #e2e8f0;
      padding: 48px 0 24px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      color: var(--text-main);
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-links a:hover {
      color: var(--brand-primary);
    }

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

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 10px;
    }

    .friend-links-flex a {
      color: var(--text-light);
      font-size: 0.85rem;
      transition: color 0.2s ease;
    }

    .friend-links-flex a:hover {
      color: var(--brand-primary);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      border-top: 1px solid #f1f5f9;
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* 悬浮辅助工具栏 */
    .float-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid rgba(144, 137, 252, 0.4);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-primary);
      cursor: pointer;
      transition: all 0.25s ease;
      font-size: 1.1rem;
    }

    .float-btn:hover {
      background: var(--brand-primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 2.2rem; }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .flow-steps-grid { grid-template-columns: repeat(2, 1fr); }
      .banner-gallery-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-top { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .header-inner { height: 60px; }
      .menu-toggle { display: block; }
      
      .nav-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid #e2e8f0;
        padding: 20px;
        box-shadow: var(--shadow-lg);
      }

      .nav-menu.active {
        display: block;
      }

      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }

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

      .hero-h1 { font-size: 1.85rem; }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-3, .grid-4, .grid-2, .banner-gallery-grid { grid-template-columns: 1fr; }
      .flow-steps-grid { grid-template-columns: 1fr; }
      .contact-layout { grid-template-columns: 1fr; padding: 24px; }
      .article-links-list { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; }
    }