:root {
      --primary: #5c3bf6;
      --primary-dark: #4121d4;
      --accent-pink: #ff2d87;
      --accent-cyan: #00d2d3;
      --accent-amber: #ff9f1a;
      --bg-base: #f8f9fe;
      --bg-surface: #ffffff;
      --bg-subtle: #f0f3fa;
      --text-main: #131728;
      --text-muted: #5e657b;
      --text-light: #8b93a8;
      --border-color: #e5e9f5;
      --shadow-sm: 0 4px 12px rgba(92, 59, 246, 0.06);
      --shadow-md: 0 10px 30px rgba(92, 59, 246, 0.1);
      --shadow-lg: 0 18px 45px rgba(25, 29, 49, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: radial-gradient(circle at 10% 10%, rgba(92, 59, 246, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 90% 90%, rgba(255, 45, 135, 0.05) 0%, transparent 40%),
                  var(--bg-base);
      color: var(--text-main);
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-spacing {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--primary);
      background: rgba(92, 59, 246, 0.1);
      border-radius: var(--radius-full);
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: none;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #7d5fff 100%);
      color: #ffffff;
      box-shadow: 0 8px 20px rgba(92, 59, 246, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 26px rgba(92, 59, 246, 0.4);
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent-pink) 0%, #ff5252 100%);
      color: #ffffff;
      box-shadow: 0 8px 20px rgba(255, 45, 135, 0.3);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 26px rgba(255, 45, 135, 0.4);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-outline:hover {
      background: var(--bg-subtle);
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 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: 0 2px 15px rgba(0, 0, 0, 0.03);
    }

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

    .logo-box {
      display: flex;
      align-items: center;
      max-height: 44px;
      max-width: 170px;
    }

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

    .nav-item a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-item a:hover {
      color: var(--primary);
      background: rgba(92, 59, 246, 0.05);
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 英雄首屏：纯设计与排版，严禁图片 */
    .hero-section {
      padding: 100px 0 80px 0;
      background: linear-gradient(180deg, #ffffff 0%, var(--bg-base) 100%);
      position: relative;
      overflow: hidden;
    }

    .hero-glow-1 {
      position: absolute;
      top: -100px;
      right: 5%;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(255, 45, 135, 0.12) 0%, transparent 70%);
      filter: blur(50px);
      pointer-events: none;
    }

    .hero-glow-2 {
      position: absolute;
      bottom: -80px;
      left: 5%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(92, 59, 246, 0.12) 0%, transparent 70%);
      filter: blur(60px);
      pointer-events: none;
    }

    .hero-container {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: #ffffff;
      border: 1px solid rgba(92, 59, 246, 0.2);
      border-radius: var(--radius-full);
      box-shadow: 0 4px 15px rgba(92, 59, 246, 0.08);
      margin-bottom: 24px;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary);
    }

    .hero-badge-pulse {
      width: 10px;
      height: 10px;
      background: var(--accent-pink);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--accent-pink);
    }

    .hero-title {
      font-size: 3.2rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-pink) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.25rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 38px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 50px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
      padding: 30px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

    .metric-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

    .metric-item:last-child {
      border-right: none;
    }

    .metric-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: inherit;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 卡片与网格通用规范 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

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

    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(92, 59, 246, 0.3);
    }

    /* 平台介绍板块 */
    .intro-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-md);
      margin-bottom: 30px;
    }

    .intro-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 30px;
    }

    .intro-feature-item {
      background: var(--bg-subtle);
      padding: 24px;
      border-radius: var(--radius-md);
      border-left: 4px solid var(--primary);
    }

    .intro-feature-item h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .intro-feature-item p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 支撑模型徽章池 */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: var(--accent-pink);
      color: var(--accent-pink);
      transform: translateY(-2px);
    }

    /* AIGC 服务矩阵卡片 */
    .service-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--text-main);
    }

    .service-badge {
      font-size: 0.75rem;
      padding: 4px 10px;
      background: rgba(0, 210, 211, 0.12);
      color: #01999a;
      border-radius: var(--radius-full);
      font-weight: 700;
    }

    .service-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 案例展示 */
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-media-container {
      aspect-ratio: 16 / 9;
      width: 100%;
      background: var(--bg-subtle);
      overflow: hidden;
    }

    .case-media-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .case-content {
      padding: 24px;
    }

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

    .case-content p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 评测与对比板块 */
    .evaluation-score-box {
      background: linear-gradient(135deg, #2b1055 0%, #7597de 100%);
      border-radius: var(--radius-lg);
      padding: 40px;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 40px;
      box-shadow: var(--shadow-lg);
    }

    .eval-score-left h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .eval-score-left p {
      color: rgba(255, 255, 255, 0.85);
      font-size: 1.05rem;
    }

    .eval-score-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-big-num {
      font-size: 3.8rem;
      font-weight: 900;
      line-height: 1;
      color: #ffd166;
    }

    .eval-stars {
      color: #ffd166;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

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

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .eval-table th {
      background: var(--bg-subtle);
      font-weight: 700;
      color: var(--text-main);
    }

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

    .eval-highlight {
      font-weight: 700;
      color: var(--primary);
    }

    /* 流程与网络 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-number {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    .step-item h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 常见问题 FAQ 手风琴 */
    .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: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }

    .faq-header {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }

    .faq-header:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--text-muted);
    }

    .faq-body {
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

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

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

    /* 用户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-quote {
      font-size: 0.96rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: normal;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .review-avatar-text {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-cyan) 100%);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .review-meta h4 {
      font-size: 0.98rem;
      font-weight: 700;
    }

    .review-meta span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 需求匹配与联系我们表单 */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group.full-width {
      grid-column: span 2;
    }

    .form-label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background: var(--bg-subtle);
      transition: border-color 0.2s ease, background 0.2s ease;
      font-family: inherit;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 资讯与百科 */
    .article-link-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    .article-item:last-child {
      border-bottom: none;
    }

    .article-item a {
      font-weight: 600;
      color: var(--text-main);
    }

    .article-item a:hover {
      color: var(--primary);
    }

    .article-date {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 页脚 */
    .site-footer {
      background: #111422;
      color: #a2a8be;
      padding: 60px 0 30px 0;
      font-size: 0.92rem;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .footer-col p {
      line-height: 1.7;
      margin-bottom: 14px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links-list a {
      color: #a2a8be;
    }

    .footer-links-list a:hover {
      color: #ffffff;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-box {
      width: 100px;
      height: 100px;
      background: #ffffff;
      padding: 6px;
      border-radius: var(--radius-sm);
    }

    .qr-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .qr-info {
      font-size: 0.85rem;
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-area {
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }

    .friend-links-area a {
      color: #7b839b;
    }

    .friend-links-area a:hover {
      color: #ffffff;
    }

    /* 浮动客服 */
    .float-service-widget {
      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-radius: 50%;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      position: relative;
      transition: transform 0.2s ease;
    }

    .float-btn:hover {
      transform: scale(1.08);
    }

    .float-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      width: 140px;
      text-align: center;
      display: none;
    }

    .float-btn:hover .float-qr-popup {
      display: block;
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      margin-bottom: 6px;
    }

    .float-qr-popup span {
      font-size: 0.78rem;
      color: var(--text-main);
      font-weight: 700;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.5rem;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(1, 1fr);
      }
      .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .intro-grid {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .metric-item:nth-child(1), .metric-item:nth-child(2) {
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 16px;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: stretch;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        padding: 16px 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 2rem;
      }
      .grid-2 {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: 1fr;
      }
      .timeline-steps {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .evaluation-score-box {
        flex-direction: column;
        align-items: flex-start;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
    }