:root {
      --primary: #4f46e5;
      --primary-dark: #3730a3;
      --accent: #ff4757;
      --accent-yellow: #ffa502;
      --accent-cyan: #00d2d3;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --contrast-dark: #1e1b4b;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
      --shadow-punch: 4px 4px 0px #0f172a;
    }

    * {
      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(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 2px solid var(--text-main);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
      font-weight: 800;
      font-size: 1.25rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: 6px;
      transition: all 0.2s ease;
    }
    .nav-links li a:hover {
      background-color: #f1f5f9;
      color: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* 艳色撞色按钮 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      padding: 10px 20px;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      font-size: 0.95rem;
      border: 2px solid var(--text-main);
    }
    .btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-punch);
    }
    .btn:active {
      transform: translate(0, 0);
      box-shadow: none;
    }
    .btn-primary {
      background-color: var(--accent-yellow);
      color: var(--text-main);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
    }
    .btn-contrast {
      background-color: var(--contrast-dark);
      color: #ffffff;
    }
    .btn-hero {
      background-color: #ffdd59;
      color: #0f172a;
      font-size: 1.1rem;
      padding: 14px 28px;
      border: 3px solid #0f172a;
      box-shadow: 4px 4px 0px #0f172a;
    }

    /* 首屏纯CSS构建 */
    .hero-section {
      background: linear-gradient(135deg, #e0e7ff 0%, #fae8ff 50%, #fef08a 100%);
      border-bottom: 3px solid var(--text-main);
      padding: 80px 0 60px;
      position: relative;
    }
    .hero-wrapper {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }
    .badge-tag {
      display: inline-block;
      background: #0f172a;
      color: #ffffff;
      font-weight: 700;
      font-size: 0.85rem;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }
    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(120deg, #4f46e5, #ff4757);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      font-weight: 500;
      line-height: 1.7;
    }
    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 40px;
    }
    .metric-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      border-radius: 12px;
      padding: 16px;
      box-shadow: 3px 3px 0px var(--text-main);
      text-align: center;
    }
    .metric-val {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--primary);
    }
    .metric-label {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 模块通用样式 */
    section {
      padding: 70px 0;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-eyebrow {
      display: inline-block;
      color: var(--primary);
      font-weight: 800;
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .section-heading {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      margin-top: 8px;
    }

    /* 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .about-card {
      background: var(--bg-card);
      border: 2px solid var(--text-main);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-punch);
      transition: transform 0.2s ease;
    }
    .about-card:hover {
      transform: translateY(-4px);
    }
    .about-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
      color: var(--text-main);
      font-weight: 800;
    }
    .about-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型支持跑马标签云 */
    .model-tags-section {
      background: #ffffff;
      border-top: 2px solid var(--border-color);
      border-bottom: 2px solid var(--border-color);
      padding: 40px 0;
    }
    .tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .model-tag {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      color: #334155;
      font-size: 0.85rem;
      font-weight: 700;
      padding: 6px 14px;
      border-radius: 6px;
    }
    .model-tag.highlight {
      background: #fee2e2;
      border-color: #f87171;
      color: #b91c1c;
    }

    /* AIGC一站式制作与场景工坊 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .scenario-item {
      background: #ffffff;
      border: 2px solid var(--text-main);
      border-radius: 10px;
      padding: 20px;
      box-shadow: 3px 3px 0px #cbd5e1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .scenario-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 12px;
    }
    .scenario-title {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-main);
    }
    .scenario-badge {
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
      background: #ede9fe;
      color: #6d28d9;
    }
    .scenario-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.5;
    }
    .scenario-footer {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--primary);
    }

    /* 对比评测板块 */
    .eval-section {
      background: linear-gradient(180deg, #f8fafc 0%, #e0e7ff 100%);
      border-top: 2px solid var(--text-main);
      border-bottom: 2px solid var(--text-main);
    }
    .eval-score-card {
      background: #ffffff;
      border: 3px solid var(--text-main);
      border-radius: 16px;
      padding: 30px;
      box-shadow: 6px 6px 0px var(--text-main);
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .eval-score-info h3 {
      font-size: 1.6rem;
      font-weight: 900;
      margin-bottom: 8px;
    }
    .eval-stars {
      color: #f59e0b;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }
    .eval-num {
      background: #0f172a;
      color: #ffdd59;
      padding: 12px 24px;
      border-radius: 12px;
      font-size: 2rem;
      font-weight: 900;
      text-align: center;
    }
    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border: 2px solid var(--text-main);
      border-radius: 12px;
      box-shadow: var(--shadow-punch);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .eval-table th {
      background: #f1f5f9;
      font-weight: 800;
      color: var(--text-main);
    }
    .eval-table tr:hover td {
      background: #faf5ff;
    }
    .eval-table .highlight-col {
      background: #fdf4ff;
      font-weight: 700;
      color: #9333ea;
    }

    /* 案例中心图文展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-punch);
    }
    .case-img-wrap {
      width: 100%;
      background: #e2e8f0;
    }
    .case-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    .case-content {
      padding: 20px;
    }
    .case-content h4 {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .case-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 流程与网络 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .step-box {
      background: #ffffff;
      border: 2px solid var(--text-main);
      border-radius: 10px;
      padding: 20px;
      position: relative;
    }
    .step-num {
      position: absolute;
      top: -12px;
      left: 16px;
      background: var(--accent);
      color: #ffffff;
      font-weight: 900;
      font-size: 0.8rem;
      padding: 2px 10px;
      border-radius: 20px;
      border: 2px solid #000;
    }
    .step-box h4 {
      margin-top: 8px;
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 6px;
    }
    .step-box p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 客户评价 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      border-radius: 12px;
      padding: 20px;
      box-shadow: 3px 3px 0px var(--text-main);
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #cbd5e1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--text-main);
      border: 2px solid var(--text-main);
    }
    .reviewer-meta h5 {
      font-size: 0.95rem;
      font-weight: 800;
    }
    .reviewer-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .review-card p {
      font-size: 0.9rem;
      color: #334155;
      line-height: 1.6;
    }

    /* FAQ折叠 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 2px solid var(--text-main);
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-question {
      padding: 16px 20px;
      font-weight: 800;
      font-size: 1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
    }
    .faq-question:hover {
      background: #f8fafc;
    }
    .faq-toggle-icon {
      font-weight: 900;
      font-size: 1.2rem;
      transition: transform 0.2s ease;
    }
    .faq-answer {
      display: none;
      padding: 0 20px 16px;
      font-size: 0.95rem;
      color: var(--text-muted);
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* 需求表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      background: #ffffff;
      border: 3px solid var(--text-main);
      border-radius: 16px;
      padding: 36px;
      box-shadow: 6px 6px 0px var(--text-main);
    }
    .contact-info h3 {
      font-size: 1.5rem;
      font-weight: 900;
      margin-bottom: 16px;
    }
    .contact-item {
      margin-bottom: 16px;
      font-size: 0.95rem;
    }
    .contact-item strong {
      display: inline-block;
      width: 100px;
      color: var(--text-main);
    }
    .qr-container {
      margin-top: 20px;
      border: 2px dashed var(--border-color);
      padding: 16px;
      border-radius: 8px;
      display: inline-block;
      background: #fafafa;
    }
    .qr-container img {
      max-width: 120px;
      height: auto;
      display: block;
      margin-bottom: 8px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 2px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 最新文章与友情链接区 */
    .meta-blocks {
      background: #f1f5f9;
      border-top: 2px solid var(--border-color);
      padding: 40px 0;
    }
    .links-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .links-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      border-radius: 8px;
      padding: 20px;
    }
    .links-card h4 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 12px;
      border-bottom: 2px solid var(--border-color);
      padding-bottom: 6px;
    }
    .article-links, .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .article-links a, .friend-links a {
      text-decoration: none;
      color: var(--primary-dark);
      background: #f8fafc;
      border: 1px solid var(--border-color);
      padding: 6px 12px;
      border-radius: 4px;
      font-size: 0.85rem;
      font-weight: 600;
      transition: all 0.2s;
    }
    .article-links a:hover, .friend-links a:hover {
      background: var(--primary);
      color: #ffffff;
    }

    /* 页脚 */
    footer.site-footer {
      background: #0f172a;
      color: #e2e8f0;
      border-top: 3px solid var(--text-main);
      padding: 40px 0 20px;
    }
    .footer-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid #334155;
    }
    .footer-left h4 {
      font-size: 1.3rem;
      color: #ffffff;
      margin-bottom: 6px;
    }
    .footer-left p {
      font-size: 0.85rem;
      color: #94a3b8;
    }
    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 浮动客服 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      background: var(--accent-yellow);
      border: 2px solid var(--text-main);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      box-shadow: 2px 2px 0px var(--text-main);
      cursor: pointer;
      text-decoration: none;
      color: var(--text-main);
    }
    .back-to-top {
      background: #ffffff;
      display: none;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .about-grid, .scenarios-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .header-inner {
        flex-direction: column;
        height: auto;
        padding: 12px 0;
        gap: 12px;
      }
      .nav-links {
        flex-wrap: wrap;
        justify-content: center;
      }
      .hero-title {
        font-size: 2rem;
      }
      .about-grid, .scenarios-grid, .reviews-grid, .case-grid, .links-grid {
        grid-template-columns: 1fr;
      }
      .flow-steps {
        grid-template-columns: 1fr;
      }
    }