:root {
      --c-bg: #f8fafc;
      --c-surface: #ffffff;
      --c-text-main: #0f172a;
      --c-text-muted: #475569;
      --c-text-light: #64748b;
      --c-brand: #ff0055;
      --c-accent-blue: #0044ff;
      --c-accent-yellow: #ffb703;
      --c-accent-cyan: #00d2d3;
      --c-border: #e2e8f0;
      --c-border-strong: #0f172a;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.05);
      --shadow-neo: 4px 4px 0px #0f172a;
      --shadow-neo-hover: 6px 6px 0px #ff0055;
      --radius: 12px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--c-bg);
      color: var(--c-text-main);
    }

    body {
      line-height: 1.6;
      overflow-x: hidden;
      background: radial-gradient(circle at 10% 20%, rgba(255, 0, 85, 0.03) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(0, 68, 255, 0.03) 0%, transparent 40%),
                  #f8fafc;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 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: 2px solid var(--c-border-strong);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
      display: block;
    }
    .brand-tag {
      font-size: 13px;
      font-weight: 700;
      color: #ffffff;
      background: var(--c-brand);
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid var(--c-border-strong);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 15px;
      font-weight: 600;
      color: var(--c-text-main);
      padding: 10px 14px;
      border-radius: 6px;
      transition: all 0.2s ease;
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--c-brand);
      background: rgba(255, 0, 85, 0.05);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-weight: 700;
      font-size: 15px;
      color: #ffffff;
      background: var(--c-brand);
      border: 2px solid var(--c-border-strong);
      border-radius: 8px;
      box-shadow: 3px 3px 0px var(--c-border-strong);
      transition: all 0.2s ease;
      cursor: pointer;
    }
    .btn-main:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--c-accent-blue);
      background: #e0004c;
    }
    .btn-alt {
      background: #ffffff;
      color: var(--c-text-main);
    }
    .btn-alt:hover {
      background: #fff9e6;
      box-shadow: 5px 5px 0px var(--c-border-strong);
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: 2px solid var(--c-border-strong);
      border-radius: 6px;
      padding: 6px 10px;
      font-size: 18px;
      font-weight: bold;
      cursor: pointer;
    }

    /* 模块通用 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }
    .section-badge {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      padding: 4px 12px;
      border-radius: 99px;
      background: #e0e7ff;
      color: var(--c-accent-blue);
      border: 1px solid var(--c-accent-blue);
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 900;
      color: var(--c-text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--c-text-muted);
    }

    /* 首屏 Hero (严禁图片) */
    .hero-section {
      padding: 80px 0 60px 0;
      background: linear-gradient(180deg, rgba(255, 240, 245, 0.7) 0%, rgba(240, 244, 255, 0.7) 100%);
      border-bottom: 2px solid var(--c-border-strong);
    }
    .hero-wrap {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }
    .hero-pretitle {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: var(--c-accent-yellow);
      border: 2px solid var(--c-border-strong);
      box-shadow: 2px 2px 0 var(--c-border-strong);
      border-radius: 30px;
      font-size: 14px;
      font-weight: 800;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 900;
      color: var(--c-text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: linear-gradient(120deg, var(--c-brand), var(--c-accent-blue));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      border-bottom: 4px solid var(--c-accent-yellow);
    }
    .hero-subtitle {
      font-size: 18px;
      line-height: 1.7;
      color: var(--c-text-muted);
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-ctas {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .btn-hero-large {
      padding: 14px 34px;
      font-size: 17px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }
    .metric-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--shadow-neo);
      text-align: center;
      transition: transform 0.2s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
    }
    .metric-value {
      font-size: 28px;
      font-weight: 900;
      color: var(--c-brand);
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 13px;
      font-weight: 700;
      color: var(--c-text-muted);
    }

    /* 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .about-content h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.4;
    }
    .about-points {
      list-style: none;
      margin: 20px 0;
      display: grid;
      gap: 12px;
    }
    .about-points li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 15px;
      color: var(--c-text-muted);
    }
    .about-badge {
      background: var(--c-accent-cyan);
      color: #000;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid #000;
      font-size: 12px;
      flex-shrink: 0;
    }
    .about-card-box {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: 6px 6px 0px var(--c-accent-blue);
    }
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }
    .model-pill {
      background: #f1f5f9;
      border: 1px solid var(--c-border-strong);
      padding: 5px 12px;
      font-size: 13px;
      font-weight: 700;
      border-radius: 6px;
      color: var(--c-text-main);
    }
    .model-pill.hot {
      background: #fee2e2;
      color: var(--c-brand);
      border-color: var(--c-brand);
    }

    /* AIGC 服务场景卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-neo);
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      box-shadow: var(--shadow-neo-hover);
      transform: translateY(-3px);
    }
    .service-tag {
      align-self: flex-start;
      font-size: 12px;
      font-weight: 800;
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid var(--c-border-strong);
      background: #fef08a;
      margin-bottom: 12px;
    }
    .service-card h4 {
      font-size: 19px;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--c-text-main);
    }
    .service-card p {
      font-size: 14px;
      color: var(--c-text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .service-footer {
      border-top: 1px dashed var(--c-border);
      padding-top: 12px;
      font-size: 13px;
      font-weight: 700;
      color: var(--c-accent-blue);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* 流程步骤 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-box {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 24px 20px;
      box-shadow: var(--shadow-neo);
      position: relative;
    }
    .step-number {
      font-size: 32px;
      font-weight: 900;
      color: var(--c-brand);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-box h4 {
      font-size: 17px;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .step-box p {
      font-size: 13px;
      color: var(--c-text-muted);
    }

    /* 对比评测表格 */
    .eval-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: 6px 6px 0 var(--c-border-strong);
      margin-bottom: 30px;
    }
    .eval-highlight {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      background: #fffbeb;
      border: 2px solid var(--c-accent-yellow);
      border-radius: 8px;
      padding: 20px 24px;
      margin-bottom: 24px;
    }
    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .score-circle {
      font-size: 36px;
      font-weight: 900;
      color: var(--c-brand);
      background: #ffffff;
      width: 76px;
      height: 76px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 2px solid var(--c-border-strong);
    }
    .score-info h4 {
      font-size: 20px;
      font-weight: 800;
    }
    .stars {
      color: #f59e0b;
      font-size: 20px;
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comparison-table th, .comparison-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--c-border);
      font-size: 14px;
    }
    .comparison-table th {
      background: #f1f5f9;
      font-weight: 800;
      color: var(--c-text-main);
    }
    .comparison-table tr:hover td {
      background: rgba(255, 0, 85, 0.02);
    }
    .text-positive {
      color: #16a34a;
      font-weight: 800;
    }
    .text-negative {
      color: #dc2626;
      font-weight: 600;
    }

    /* 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .case-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-neo);
    }
    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #e2e8f0;
      border-bottom: 2px solid var(--c-border-strong);
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .case-body {
      padding: 24px;
    }
    .case-body h4 {
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .case-body p {
      font-size: 14px;
      color: var(--c-text-muted);
      margin-bottom: 16px;
    }

    /* 资讯板块 */
    .media-showcase {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 24px;
      margin-bottom: 30px;
    }
    .square-media-box {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: var(--shadow-neo);
    }
    .square-media-box img {
      width: 100%;
      height: auto;
      border-radius: 6px;
      display: block;
      border: 1px solid var(--c-border);
    }
    .articles-list-box {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-neo);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-links {
      list-style: none;
      display: grid;
      gap: 12px;
      margin: 16px 0;
    }
    .article-links li a {
      font-size: 14px;
      font-weight: 600;
      color: var(--c-accent-blue);
      text-decoration: underline;
      display: inline-block;
      transition: color 0.2s;
    }
    .article-links li a:hover {
      color: var(--c-brand);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .review-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-neo);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: var(--c-text-muted);
      margin-bottom: 18px;
      line-height: 1.6;
      font-style: italic;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--c-border);
      padding-top: 12px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      background: var(--c-accent-yellow);
      border: 2px solid var(--c-border-strong);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 16px;
    }
    .user-meta h5 {
      font-size: 14px;
      font-weight: 800;
    }
    .user-meta span {
      font-size: 12px;
      color: var(--c-text-light);
    }

    /* FAQ 折叠 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: grid;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      box-shadow: var(--shadow-neo);
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      background: transparent;
      border: none;
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 800;
      color: var(--c-text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-icon {
      font-size: 20px;
      font-weight: bold;
      transition: transform 0.2s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--c-brand);
    }
    .faq-answer {
      display: none;
      padding: 0 22px 18px 22px;
      font-size: 14px;
      color: var(--c-text-muted);
      line-height: 1.7;
      border-top: 1px solid var(--c-border);
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 表单与联系区 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
    .contact-info-card, .form-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: 6px 6px 0px var(--c-border-strong);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--c-border-strong);
      border-radius: 6px;
      font-size: 14px;
      background: #f8fafc;
    }
    .form-control:focus {
      outline: none;
      background: #ffffff;
      border-color: var(--c-brand);
    }
    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }
    .contact-detail-row {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 18px;
    }
    .qr-showcase {
      display: flex;
      align-items: center;
      gap: 20px;
      margin-top: 24px;
      padding-top: 20px;
      border-top: 2px dashed var(--c-border);
    }
    .qr-showcase img {
      width: 110px;
      height: 110px;
      border: 2px solid var(--c-border-strong);
      border-radius: 8px;
    }

    /* 底部收尾 */
    .site-footer {
      background: #0f172a;
      color: #f1f5f9;
      padding: 60px 0 30px 0;
      border-top: 4px solid var(--c-brand);
    }
    .footer-main {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 22px;
      font-weight: 900;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 14px;
      color: #94a3b8;
      line-height: 1.6;
    }
    .footer-col h5 {
      font-size: 16px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .footer-links {
      list-style: none;
      display: grid;
      gap: 8px;
    }
    .footer-links a {
      font-size: 14px;
      color: #cbd5e1;
      transition: color 0.2s ease;
    }
    .footer-links a:hover {
      color: var(--c-brand);
    }
    .footer-friend-links {
      border-top: 1px solid #334155;
      padding: 20px 0;
      margin-bottom: 20px;
      font-size: 13px;
      color: #94a3b8;
    }
    .footer-friend-links a {
      color: #cbd5e1;
      margin-right: 14px;
      display: inline-block;
    }
    .footer-friend-links a:hover {
      color: var(--c-accent-yellow);
    }
    .footer-bottom {
      text-align: center;
      font-size: 13px;
      color: #64748b;
      border-top: 1px solid #1e293b;
      padding-top: 20px;
    }

    /* 浮动组件 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 3px 3px 0 var(--c-border-strong);
      font-size: 20px;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      background: var(--c-brand);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 响应式样式 */
    @media (max-width: 992px) {
      .services-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps, .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid, .case-grid, .media-showcase, .contact-container {
        grid-template-columns: 1fr;
      }
      .footer-main {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 2px solid var(--c-border-strong);
        padding: 16px 24px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
      }
      .nav-links.active li {
        width: 100%;
      }
      .nav-links.active li a {
        display: block;
        padding: 12px 0;
        border-bottom: 1px solid var(--c-border);
      }
    }
    @media (max-width: 640px) {
      .services-grid, .reviews-grid, .workflow-steps, .hero-metrics {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 30px;
      }
      .eval-highlight {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
    }