/* 全局 CSS 变量设定 - 艳红热烈风 */
    :root {
      --primary-red: #d9232e;
      --primary-dark-red: #a8131c;
      --accent-red: #ff3b47;
      --light-bg-red: #fff8f8;
      --card-bg-light: #ffffff;
      --text-main: #1f1f1f;
      --text-muted: #555555;
      --text-light: #888888;
      --border-color: #f0cece;
      --shadow-soft: 0 10px 30px rgba(217, 35, 46, 0.08);
      --shadow-hover: 0 15px 35px rgba(217, 35, 46, 0.16);
      --container-max-width: 1200px;
    }

    * {
      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: #fdfaf7;
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      width: 100%;
      overflow-x: hidden;
      background-color: var(--light-bg-red);
    }

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

    a:hover {
      color: var(--primary-dark-red);
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

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

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

    /* 规则要求: .nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--primary-red);
      background-color: rgba(217, 35, 46, 0.05);
    }

    .nav-cta-btn {
      background: linear-gradient(135deg, var(--primary-red), var(--accent-red));
      color: #ffffff !important;
      padding: 9px 20px !important;
      border-radius: 50px !important;
      font-weight: 600 !important;
      box-shadow: 0 4px 12px rgba(217, 35, 46, 0.3);
      margin-left: 10px;
    }

    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(217, 35, 46, 0.4);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary-red);
      cursor: pointer;
    }

    /* 首屏 HERO 区域 (严格禁止包含图片) */
    .hero-section {
      padding: 90px 0 70px;
      background: linear-gradient(180deg, #ffffff 0%, #fff0f0 100%);
      text-align: center;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffe3e3;
      color: var(--primary-red);
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 24px;
      border: 1px solid rgba(217, 35, 46, 0.2);
    }

    .hero-title-h1 {
      font-size: 38px;
      line-height: 1.25;
      font-weight: 800;
      color: #111111;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 35px;
      line-height: 1.7;
    }

    .hero-btn-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 20px;
      margin-bottom: 50px;
    }

    .btn-primary-lg {
      display: inline-block;
      padding: 16px 38px;
      background: linear-gradient(135deg, var(--primary-red) 0%, #c0111a 100%);
      color: #ffffff;
      font-size: 17px;
      font-weight: 700;
      border-radius: 50px;
      box-shadow: 0 8px 24px rgba(217, 35, 46, 0.35);
      border: none;
      cursor: pointer;
    }

    .btn-primary-lg:hover {
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(217, 35, 46, 0.45);
    }

    .btn-secondary-lg {
      display: inline-block;
      padding: 16px 36px;
      background: #ffffff;
      color: var(--primary-red);
      font-size: 17px;
      font-weight: 700;
      border-radius: 50px;
      border: 2px solid var(--primary-red);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    }

    .btn-secondary-lg:hover {
      background: #fff0f0;
      transform: translateY(-2px);
    }

    /* 数字卡片 (首屏) */
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 960px;
      margin: 0 auto;
    }

    .metric-card {
      background: #ffffff;
      padding: 22px 15px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
    }

    .metric-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-red);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用 Block 样式 */
    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 750px;
      margin: 0 auto 50px;
    }

    .section-tag {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary-red);
      letter-spacing: 1px;
      margin-bottom: 10px;
      display: block;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #111111;
      margin-bottom: 15px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* 关于我们 / 平台介绍 */
    .about-card-box {
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 26px;
      margin-bottom: 18px;
      color: var(--primary-dark-red);
    }

    .about-text p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 15px;
      line-height: 1.8;
    }

    .model-tags-wrapper {
      background: #fff5f5;
      padding: 25px;
      border-radius: 16px;
      border: 1px dashed var(--border-color);
    }

    .model-tags-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 15px;
      color: var(--primary-red);
    }

    .model-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-tag {
      background: #ffffff;
      color: var(--text-main);
      padding: 5px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #ffd4d4;
    }

    /* AIGC 服务场景卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .service-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary-red);
    }

    .service-icon {
      width: 50px;
      height: 50px;
      background: #ffebeb;
      color: var(--primary-red);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .service-card h4 {
      font-size: 19px;
      margin-bottom: 10px;
      color: #111111;
    }

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

    /* 一站式制作 & 行业方案 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .solution-box {
      background: linear-gradient(145deg, #ffffff, #fff5f5);
      border-radius: 16px;
      padding: 25px 20px;
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .solution-box h5 {
      font-size: 18px;
      color: var(--primary-dark-red);
      margin-bottom: 10px;
    }

    .solution-box p {
      font-size: 13px;
      color: var(--text-muted);
    }

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

    .step-item {
      background: #ffffff;
      padding: 24px 15px;
      border-radius: 14px;
      text-align: center;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-red);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px;
    }

    .step-item h6 {
      font-size: 16px;
      margin-bottom: 8px;

    }

    .step-item p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 案例中心 (包含真实图片) */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .case-card {
      background: #ffffff;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
    }

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #f0f0f0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .ai-page-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .case-content {
      padding: 20px;
    }

    .case-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #111111;
    }

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

    /* 对比评测 (必含五星，9.9分) */
    .rating-banner {
      background: linear-gradient(135deg, #d9232e, #8f0d14);
      color: #ffffff;
      border-radius: 20px;
      padding: 35px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: 0 10px 30px rgba(217, 35, 46, 0.25);
    }

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

    .score-big {
      font-size: 56px;
      font-weight: 900;
      line-height: 1;
    }

    .stars {
      font-size: 24px;
      color: #ffca28;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0f0f0;
      font-size: 14px;
    }

    .compare-table th {
      background: #fff0f0;
      color: var(--primary-dark-red);
      font-weight: 700;
    }

    .compare-table tr:hover {
      background: #fff9f9;
    }

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

    /* Token 比价 */
    .token-table-wrap {
      background: #ffffff;
      border-radius: 16px;
      padding: 25px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
    }

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

    .review-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 25px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 15px;
    }

    .user-avatar-text {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-red);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

    .user-info-name {
      font-size: 16px;
      font-weight: 700;
    }

    .user-info-role {
      font-size: 12px;
      color: var(--text-light);
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--primary-red);
      font-weight: 400;
    }

    .faq-item.active .faq-question::after {
      content: "−";
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px dashed #f0f0f0;
      padding-top: 15px;
    }

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

    /* 加盟代理 */
    .agency-box {
      background: linear-gradient(135deg, #fff0f0, #ffe5e5);
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .agency-box h3 {
      font-size: 28px;
      color: var(--primary-dark-red);
      margin-bottom: 15px;
    }

    .agency-features {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin: 30px 0;
    }

    .agency-feat-item {
      background: #ffffff;
      padding: 20px;
      border-radius: 12px;
      box-shadow: var(--shadow-soft);
    }

    /* 联系我们与表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
    }

    .contact-info-list p {
      margin-bottom: 15px;
      font-size: 15px;
      color: var(--text-muted);
    }

    .contact-qr-wrap {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .contact-qr-wrap img {
      width: 120px;
      height: 120px;
      border-radius: 8px;
      border: 1px solid #ddd;
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

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

    .form-group label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      padding: 12px 15px;
      border: 1px solid #ddd;
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.3s;
    }

    .form-control:focus {
      border-color: var(--primary-red);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .submit-btn {
      background: var(--primary-red);
      color: #ffffff;
      border: none;
      padding: 14px;
      border-radius: 8px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      transition: background 0.3s;
    }

    .submit-btn:hover {
      background: var(--primary-dark-red);
    }

    /* 行业资讯 & 友情链接 */
    .articles-box {
      background: #ffffff;
      padding: 30px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      margin-bottom: 40px;
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      list-style: none;
      margin-top: 15px;
    }

    .article-links-list li a {
      background: #fff5f5;
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 14px;
      display: inline-block;
    }

    /* 页脚 */
    footer.site-footer {
      background-color: #1a1a1a;
      color: #cccccc;
      padding: 60px 0 30px;
      border-top: 4px solid var(--primary-red);
    }

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

    .footer-col h6 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 20px;
    }

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

    .footer-links a {
      color: #aaaaaa;
      font-size: 14px;
    }

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

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links-flex a {
      color: #aaaaaa;
      font-size: 13px;
      background: #2a2a2a;
      padding: 4px 10px;
      border-radius: 4px;
    }

    .friend-links-flex a:hover {
      color: #ffffff;
      background: var(--primary-red);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid #333333;
      font-size: 13px;
      color: #777777;
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: #ffffff;
      border-radius: 12px;
      padding: 12px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .float-service img {
      width: 90px;
      height: 90px;
      border-radius: 6px;
    }

    .float-service p {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary-red);
      margin-top: 4px;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-metrics-grid, .services-grid, .solutions-grid, .reviews-grid, .case-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(3, 1fr);
      }
      .about-card-box, .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-top: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title-h1 {
        font-size: 26px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .hero-metrics-grid, .services-grid, .solutions-grid, .reviews-grid, .case-grid, .agency-features {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr;
      }
      .hero-btn-group {
        flex-direction: column;
      }
      .btn-primary-lg, .btn-secondary-lg {
        width: 100%;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 15px;
      }
    }