:root {
      --bg-base: #faf8f5;
      --bg-card: #ffffff;
      --text-main: #1e242b;
      --text-muted: #5c6875;
      --graffiti-yellow: #ffd027;
      --graffiti-pink: #ff4370;
      --graffiti-cyan: #00d2d3;
      --graffiti-purple: #7952f5;
      --graffiti-dark: #121820;
      --border-ink: #121820;
      --shadow-ink: 4px 4px 0px #121820;
      --shadow-ink-hover: 6px 6px 0px #121820;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(#e2dec9 1px, transparent 1px) 0 0 / 24px 24px, var(--bg-base);
      min-height: 100vh;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

    /* 顶部导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      border-bottom: 3px solid var(--border-ink);
      backdrop-filter: blur(8px);
    }

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

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

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

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

    .nav-links li a {
      font-weight: 700;
      font-size: 15px;
      padding: 8px 12px;
      color: var(--text-main);
      border-radius: var(--radius-sm);
      transition: background-color 0.2s, color 0.2s;
    }

    .nav-links li a:hover {
      background: var(--graffiti-yellow);
      color: var(--graffiti-dark);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      padding: 10px 20px;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-ink);
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      cursor: pointer;
      text-align: center;
      font-size: 15px;
    }

    .btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-ink-hover);
    }

    .btn:active {
      transform: translate(2px, 2px);
      box-shadow: 1px 1px 0px var(--border-ink);
    }

    .btn-primary {
      background: var(--graffiti-pink);
      color: #ffffff;
    }

    .btn-action {
      background: var(--graffiti-yellow);
      color: var(--graffiti-dark);
    }

    .btn-cyan {
      background: var(--graffiti-cyan);
      color: var(--graffiti-dark);
    }

    .btn-purple {
      background: var(--graffiti-purple);
      color: #ffffff;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--border-ink);
      border-radius: 6px;
      padding: 6px 10px;
      font-weight: 900;
      cursor: pointer;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 60px 0 40px;
      text-align: center;
    }

    .hero-badge {
      display: inline-block;
      background: var(--graffiti-yellow);
      border: 2px solid var(--border-ink);
      border-radius: 30px;
      padding: 6px 18px;
      font-weight: 800;
      font-size: 14px;
      box-shadow: 3px 3px 0 var(--border-ink);
      margin-bottom: 20px;
      transform: rotate(-1.5deg);
    }

    .hero-title {
      font-size: clamp(32px, 4.5vw, 54px);
      font-weight: 900;
      color: var(--graffiti-dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight-pink {
      background: linear-gradient(180deg, transparent 65%, rgba(255, 67, 112, 0.4) 65%);
      display: inline-block;
    }

    .hero-desc {
      max-width: 820px;
      margin: 0 auto 32px;
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

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

    .stat-card {
      background: var(--bg-card);
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-ink);
      text-align: center;
    }

    .stat-num {
      font-size: 32px;
      font-weight: 900;
      color: var(--graffiti-purple);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-muted);
    }

    /* 通用Section */
    .section-wrap {
      padding: 60px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 40px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      padding: 4px 12px;
      background: var(--graffiti-cyan);
      border: 2px solid var(--border-ink);
      border-radius: 20px;
      box-shadow: 2px 2px 0 var(--border-ink);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 900;
      color: var(--graffiti-dark);
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 平台支持标签云 */
    .model-tags-box {
      background: var(--bg-card);
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-ink);
      margin-bottom: 40px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-pill {
      font-size: 13px;
      font-weight: 800;
      padding: 6px 14px;
      border: 2px solid var(--border-ink);
      border-radius: 30px;
      background: #fdfdfd;
      box-shadow: 2px 2px 0 var(--border-ink);
      transition: all 0.2s;
    }

    .model-pill:hover {
      transform: translateY(-2px);
      background: var(--graffiti-yellow);
    }

    /* 网格卡片 */
    .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: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-ink);
      transition: transform 0.2s, box-shadow 0.2s;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-ink-hover);
    }

    .feature-icon-badge {
      width: 48px;
      height: 48px;
      border: 2px solid var(--border-ink);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 900;
      margin-bottom: 16px;
      box-shadow: 2px 2px 0 var(--border-ink);
    }

    .card-title {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--graffiti-dark);
    }

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

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

    .step-card {
      background: var(--bg-card);
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      box-shadow: var(--shadow-ink);
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--graffiti-pink);
      color: #fff;
      font-weight: 900;
      border: 2px solid var(--border-ink);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    /* 评测与比价 */
    .table-responsive {
      width: 100%;
      overflow-x: auto;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-ink);
      background: #fff;
    }

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

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #e2e8f0;
      font-size: 14px;
    }

    .custom-table th {
      background: var(--graffiti-dark);
      color: #fff;
      font-weight: 800;
    }

    .custom-table tr:nth-child(even) {
      background-color: #fafbfc;
    }

    .custom-table tr:hover {
      background-color: #fffde6;
    }

    .rating-badge {
      display: inline-flex;
      align-items: center;
      background: var(--graffiti-yellow);
      border: 2px solid var(--border-ink);
      border-radius: 6px;
      padding: 4px 10px;
      font-weight: 900;
      font-size: 14px;
    }

    /* 案例展示 */
    .case-banner-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 24px;
    }

    .media-card {
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 14px;
      box-shadow: var(--shadow-ink);
    }

    .media-card img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-sm);
      border: 1px solid #e2e8f0;
      display: block;
    }

    .media-card-title {
      font-size: 15px;
      font-weight: 800;
      margin-top: 10px;
    }

    /* 评论卡片 */
    .review-card {
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-ink);
    }

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

    .review-avatar {
      width: 44px;
      height: 44px;
      border: 2px solid var(--border-ink);
      border-radius: 50%;
      background: var(--graffiti-yellow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
    }

    .author-name {
      font-weight: 800;
      font-size: 15px;
    }

    .author-role {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 960px;
      margin: 0 auto;
    }

    .faq-item {
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-ink);
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 800;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #fff;
    }

    .faq-question:hover {
      background: #fffbe6;
    }

    .faq-answer {
      display: none;
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px dashed #e2e8f0;
      margin-top: 10px;
      padding-top: 14px;
    }

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

    .faq-toggle-icon {
      font-size: 18px;
      font-weight: 900;
      transition: transform 0.2s;
    }

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

    /* 需求匹配表单与联系 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-ink);
    }

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

    .form-label {
      display: block;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      background: #fafbfc;
      font-family: inherit;
    }

    .form-control:focus {
      background: #fff;
      border-color: var(--graffiti-purple);
    }

    .contact-info-panel {
      background: #fffdf5;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 3px 3px 0 var(--border-ink);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .qr-box {
      text-align: center;
      margin: 16px 0;
    }

    .qr-box img {
      max-width: 140px;
      height: auto;
      border: 2px solid var(--border-ink);
      border-radius: 8px;
      box-shadow: 2px 2px 0 var(--border-ink);
    }

    .info-item {
      font-size: 14px;
      margin-bottom: 8px;
    }

    /* 资讯与外链 */
    .article-links-box {
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-ink);
      margin-bottom: 24px;
    }

    .link-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 12px;
    }

    .link-pills a {
      background: #f0f3f6;
      border: 1px solid var(--border-ink);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 700;
      transition: background 0.2s;
    }

    .link-pills a:hover {
      background: var(--graffiti-yellow);
    }

    /* 页脚 */
    .site-footer {
      background: #121820;
      color: #cbd5e1;
      padding: 40px 0 20px;
      margin-top: 60px;
      border-top: 4px solid var(--graffiti-pink);
    }

    .footer-content {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 30px;
      padding-bottom: 30px;
      border-bottom: 1px solid #2d3748;
    }

    .footer-brand {
      color: #fff;
      font-size: 20px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .footer-desc {
      font-size: 13px;
      line-height: 1.7;
    }

    .footer-title {
      color: #fff;
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 8px;
      font-size: 13px;
    }

    .footer-links a:hover {
      color: var(--graffiti-yellow);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      font-size: 12px;
      color: #718096;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      background: var(--graffiti-yellow);
      border: 2px solid var(--border-ink);
      border-radius: 50px;
      padding: 10px 18px;
      box-shadow: var(--shadow-ink);
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 800;
      font-size: 14px;
      cursor: pointer;
      transition: transform 0.2s;
    }

    .float-kefu:hover {
      transform: scale(1.05);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-stats-grid, .grid-4, .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-content {
        grid-template-columns: 1fr;
      }
      .case-banner-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: #fff;
        border-bottom: 2px solid var(--border-ink);
        flex-direction: column;
        padding: 16px 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-stats-grid, .grid-3, .grid-4, .grid-2, .process-timeline {
        grid-template-columns: 1fr;
      }
      .nav-cta .btn {
        display: none;
      }
    }