/* 全局样式 - 暗夜赛博高饱和粉紫风 */
    :root {
      --bg-dark: #0d0614;
      --bg-card: #160b26;
      --bg-card-hover: #22123b;
      --accent-pink: #ff2a8d;
      --accent-purple: #9d4edd;
      --accent-cyan: #00f0ff;
      --text-main: #f5f0ff;
      --text-sub: #bba8df;
      --text-muted: #7e69a0;
      --border-color: rgba(255, 42, 141, 0.25);
      --border-glow: rgba(255, 42, 141, 0.6);
      --shadow-glow: 0 0 25px rgba(255, 42, 141, 0.25);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-family);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: var(--accent-cyan);
      text-decoration: none;
      transition: all 0.3s ease;
    }

    a:hover {
      color: var(--accent-pink);
    }

    /* 统一主容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 通用标题与版块 */
    .section-padding {
      padding: 80px 0;
      border-bottom: 1px solid rgba(157, 78, 221, 0.15);
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      background: linear-gradient(135deg, #ffffff 0%, var(--accent-pink) 50%, var(--accent-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

    .section-desc {
      color: var(--text-sub);
      font-size: 1rem;
      max-width: 700px;
      margin: 0 auto;
    }

    .tag-badge {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      background: rgba(255, 42, 141, 0.15);
      border: 1px solid var(--accent-pink);
      color: var(--accent-pink);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 15px;
      text-transform: uppercase;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 0.95rem;
      cursor: pointer;
      transition: all 0.3s ease;
      border: none;
      outline: none;
      gap: 8px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      color: #fff;
      box-shadow: 0 0 15px rgba(255, 42, 141, 0.4);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(255, 42, 141, 0.7);
      color: #fff;
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
    }

    .btn-secondary:hover {
      background: rgba(0, 240, 255, 0.15);
      color: #fff;
      transform: translateY(-2px);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(13, 6, 20, 0.9);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    /* 约束CSS：.nav-links gap必须为0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      padding: 10px 14px;
      color: var(--text-sub);
      font-size: 0.92rem;
      font-weight: 500;
      display: inline-block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--accent-pink);
      text-shadow: 0 0 8px rgba(255, 42, 141, 0.5);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: var(--text-main);
      font-size: 1.5rem;
      cursor: pointer;
    }

    /* 首屏 HERO 区域（严禁出现任何图片） */
    .hero-section {
      padding: 100px 0 80px 0;
      background: radial-gradient(circle at 50% 30%, rgba(157, 78, 221, 0.25) 0%, rgba(13, 6, 20, 1) 70%);
      text-align: center;
      position: relative;
    }

    .hero-h1 {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #ffffff 0%, #ff77ee 50%, var(--accent-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-sub);
      max-width: 800px;
      margin: 0 auto 35px auto;
    }

    .hero-btns {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      margin-bottom: 50px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px 15px;
      border-radius: 16px;
      transition: all 0.3s ease;
    }

    .stat-card:hover {
      border-color: var(--accent-pink);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 5px;
    }

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

    /* 关于我们与平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 35px;
    }

    .about-card h3 {
      font-size: 1.5rem;
      color: #fff;
      margin-bottom: 15px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .model-tag {
      background: rgba(157, 78, 221, 0.15);
      border: 1px solid rgba(157, 78, 221, 0.4);
      color: #e0d5fa;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
    }

    /* AIGC 服务卡片网格 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px 25px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .service-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--accent-pink);
      transform: translateY(-5px);
      box-shadow: var(--shadow-glow);
    }

    .service-icon {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(255, 42, 141, 0.2), rgba(0, 240, 255, 0.2));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
      color: var(--accent-cyan);
    }

    .service-card h3 {
      font-size: 1.2rem;
      color: #fff;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-sub);
    }

    /* 一站式制作与工作流 */
    .feature-list-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 25px;
    }

    .feature-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 25px;
      display: flex;
      gap: 15px;
    }

    .feature-item-num {
      font-size: 1.5rem;
      font-weight: 900;
      color: var(--accent-pink);
    }

    /* 标准流程 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 15px;
      position: relative;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 20px 15px;
      text-align: center;
    }

    .step-index {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--accent-pink);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px auto;
      font-weight: 700;
    }

    /* 案例展示区 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      overflow: hidden;
    }

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
    }

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

    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-info {
      padding: 20px;
    }

    .case-info h4 {
      font-size: 1.1rem;
      color: #fff;
      margin-bottom: 8px;
    }

    /* 对比评测表格 */
    .compare-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
      overflow-x: auto;
    }

    .rating-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: rgba(255, 42, 141, 0.1);
      padding: 20px;
      border-radius: 12px;
      border: 1px solid var(--accent-pink);
      margin-bottom: 25px;
    }

    .rating-score {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent-pink);
    }

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

    .compare-table th,
    .compare-table td {
      padding: 14px 18px;
      border-bottom: 1px solid rgba(157, 78, 221, 0.2);
    }

    .compare-table th {
      background: rgba(157, 78, 221, 0.15);
      color: #fff;
    }

    .highlight-cell {
      color: var(--accent-cyan);
      font-weight: 700;
    }

    /* Token 比价 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .token-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 25px;
      text-align: center;
    }

    .price-num {
      font-size: 1.8rem;
      color: var(--accent-pink);
      font-weight: 800;
      margin: 15px 0;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--accent-pink);
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: rgba(0, 0, 0, 0.2);
      color: var(--text-sub);
      font-size: 0.95rem;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 18px 24px;
    }

    /* 客户评论区 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 25px;
    }

    .reviewer {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 15px;
    }

    .avatar-fake {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }

    /* 行业资讯 & 最新文章 */
    .articles-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
    }

    .articles-links-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 15px;
    }

    .article-item-link {
      display: flex;
      justify-content: space-between;
      padding: 12px 18px;
      background: rgba(255, 255, 255, 0.03);
      border-radius: 8px;
      border: 1px solid rgba(157, 78, 221, 0.15);
    }

    .article-item-link:hover {
      border-color: var(--accent-pink);
      background: rgba(255, 42, 141, 0.08);
    }

    /* 联系表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 35px;
    }

    .contact-form {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 35px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 0.9rem;
      color: var(--text-sub);
    }

    .form-control {
      background: rgba(0, 0, 0, 0.3);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 12px 15px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.3s;
    }

    .form-control:focus {
      border-color: var(--accent-pink);
      box-shadow: 0 0 10px rgba(255, 42, 141, 0.3);
    }

    /* 页脚规范 */
    .site-footer {
      background: #07030b;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px 0;
      color: var(--text-sub);
      font-size: 0.9rem;
    }

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

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      margin-top: 15px;
    }

    .footer-bottom {
      text-align: center;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 浮动客服入口 */
    .floating-kefu {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      padding: 12px 20px;
      border-radius: 30px;
      box-shadow: 0 0 20px rgba(255, 42, 141, 0.6);
      display: flex;
      align-items: center;
      gap: 10px;
      cursor: pointer;
      color: #fff;
      font-weight: 700;
    }

    .kefu-popover {
      display: none;
      position: absolute;
      bottom: 60px;
      right: 0;
      background: var(--bg-card);
      border: 1px solid var(--accent-pink);
      padding: 15px;
      border-radius: 12px;
      width: 200px;
      text-align: center;
      box-shadow: var(--shadow-glow);
    }

    .floating-kefu:hover .kefu-popover {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-stats-grid,
      .service-grid,
      .cases-grid,
      .token-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps {
        grid-template-columns: repeat(3, 1fr);
      }
      .about-grid,
      .contact-grid,
      .footer-top {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 1.9rem;
      }
      .hero-stats-grid,
      .service-grid,
      .cases-grid,
      .token-grid,
      .reviews-grid,
      .feature-list-grid,
      .workflow-steps {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: var(--bg-card);
        flex-direction: column;
        padding: 20px 0;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
    }