:root {
      --primary-laser: #3d5afe;
      --laser-pink: #f50057;
      --laser-cyan: #00e5ff;
      --laser-purple: #7c4dff;
      --laser-gradient: linear-gradient(135deg, rgba(61, 90, 254, 0.08) 0%, rgba(245, 0, 87, 0.08) 50%, rgba(0, 229, 255, 0.08) 100%);
      --laser-border: linear-gradient(135deg, rgba(61, 90, 254, 0.4), rgba(245, 0, 87, 0.4), rgba(0, 229, 255, 0.4));
      --text-main: #1e2432;
      --text-sub: #525f7f;
      --bg-white: #ffffff;
      --bg-soft: #f8faff;
      --bg-card: rgba(255, 255, 255, 0.88);
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 12px rgba(30, 36, 50, 0.04);
      --shadow-md: 0 10px 25px rgba(61, 90, 254, 0.08);
      --shadow-laser: 0 12px 32px rgba(124, 77, 255, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #f6f8fd;
      background-image: radial-gradient(at 0% 0%, rgba(61, 90, 254, 0.05) 0px, transparent 50%),
                        radial-gradient(at 100% 100%, rgba(245, 0, 87, 0.04) 0px, transparent 50%);
      background-attachment: fixed;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      background: linear-gradient(135deg, #1e2432 0%, #3d5afe 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-sub);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
      color: var(--primary-laser);
      background: rgba(61, 90, 254, 0.05);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 30px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      text-align: center;
    }

    .btn-laser-solid {
      background: linear-gradient(135deg, #3d5afe, #7c4dff, #f50057);
      background-size: 200% 200%;
      color: #ffffff !important;
      box-shadow: 0 6px 18px rgba(124, 77, 255, 0.3);
    }

    .btn-laser-solid:hover {
      background-position: 100% 100%;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(124, 77, 255, 0.4);
    }

    .btn-laser-outline {
      background: #ffffff;
      color: var(--primary-laser);
      border-color: rgba(61, 90, 254, 0.4);
    }

    .btn-laser-outline:hover {
      border-color: var(--primary-laser);
      background: rgba(61, 90, 254, 0.04);
      transform: translateY(-2px);
    }

    .nav-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .nav-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 区域通用规范 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

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

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      padding: 4px 14px;
      background: var(--laser-gradient);
      border: 1px solid rgba(124, 77, 255, 0.2);
      border-radius: 20px;
      color: var(--primary-laser);
      margin-bottom: 12px;
    }

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

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

    /* Hero 首屏 (严格无图片) */
    .hero-section {
      padding: 100px 0 80px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(255,255,255,0.7) 0%, rgba(246,248,253,0.4) 100%);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 30px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(61, 90, 254, 0.25);
      box-shadow: 0 4px 12px rgba(61, 90, 254, 0.08);
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary-laser);
      margin-bottom: 24px;
    }

    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #00e5ff;
      box-shadow: 0 0 10px #00e5ff;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 24px;
      line-height: 1.25;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #3d5afe, #f50057, #7c4dff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.18rem;
      color: var(--text-sub);
      max-width: 800px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

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

    .hero-feature-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      max-width: 900px;
      margin: 0 auto;
    }

    .feature-tag-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 18px;
      border-radius: 20px;
      font-size: 0.88rem;
      color: var(--text-sub);
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .feature-tag-item::before {
      content: "✦";
      color: var(--laser-pink);
    }

    /* 数据指标条 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .metric-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      text-align: center;
      transition: transform 0.3s;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-laser);
    }

    .metric-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-laser);
      line-height: 1;
      margin-bottom: 8px;
    }

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

    /* 平台介绍与模型网格 */
    .platform-intro-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-bottom: 40px;
    }

    .platform-intro-box p {
      font-size: 1.05rem;
      color: var(--text-sub);
      margin-bottom: 20px;
      line-height: 1.8;
    }

    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .model-pill {
      background: var(--bg-soft);
      border: 1px solid rgba(61, 90, 254, 0.15);
      color: var(--text-main);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
    }

    /* 服务能力卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-5px);
      border-color: rgba(61, 90, 254, 0.4);
      box-shadow: var(--shadow-laser);
    }

    .card-badge {
      display: inline-block;
      align-self: flex-start;
      padding: 4px 10px;
      font-size: 0.75rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #3d5afe, #7c4dff);
      border-radius: 4px;
      margin-bottom: 14px;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .card-text {
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .card-features {
      list-style: none;
      font-size: 0.88rem;
      color: var(--text-sub);
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }

    .card-features li {
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .card-features li::before {
      content: "✔";
      color: #00c853;
      font-size: 0.8rem;
    }

    /* 流程步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      padding: 30px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: var(--laser-gradient);
      border: 1px solid rgba(61, 90, 254, 0.3);
      color: var(--primary-laser);
      font-weight: 800;
      font-size: 1.2rem;
      border-radius: 50%;
      margin: 0 auto 16px auto;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

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

    /* 案例图片展示 */
    .media-gallery {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 24px;
    }

    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .media-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }

    .media-card-body {
      padding: 18px;
    }

    .banner-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .banner-grid-item {
      border-radius: var(--radius-sm);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .banner-grid-item img {
      width: 100%;
      height: 160px;
      object-fit: cover;
    }

    /* 对比评测板块 */
    .review-highlight {
      background: #ffffff;
      border: 2px solid transparent;
      border-image: var(--laser-border) 1;
      border-radius: var(--radius-md);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

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

    .score-big {
      font-size: 3.6rem;
      font-weight: 900;
      color: var(--primary-laser);
      line-height: 1;
    }

    .score-stars {
      color: #ffab00;
      font-size: 1.4rem;
      margin-bottom: 4px;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 600px;
      text-align: left;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

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

    .compare-table td.brand-col {
      font-weight: 700;
      color: var(--primary-laser);
      background: rgba(61, 90, 254, 0.02);
    }

    /* Token 比价卡片 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .token-card {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      position: relative;
    }

    .token-card.featured {
      border: 2px solid var(--primary-laser);
      transform: scale(1.02);
    }

    .token-name {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .token-price {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--laser-pink);
      margin-bottom: 16px;
    }

    .token-price small {
      font-size: 0.9rem;
      color: var(--text-sub);
      font-weight: normal;
    }

    /* 客户评论卡片 */
    .review-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .user-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .user-avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--laser-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary-laser);
    }

    .user-role {
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    .user-comment {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.6;
    }

    /* FAQ 折叠 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

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

    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: transparent;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s;
      color: var(--primary-laser);
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      color: var(--text-sub);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-body {
      max-height: 500px;
      padding-bottom: 18px;
    }

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

    /* 表单板块 */
    .form-wrap {
      max-width: 700px;
      margin: 0 auto;
      background: #ffffff;
      padding: 40px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-laser);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 8px;
      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;
      outline: none;
      transition: border 0.3s;
      background: var(--bg-soft);
    }

    .form-control:focus {
      border-color: var(--primary-laser);
      background: #ffffff;
    }

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

    /* 资讯与友情链接 */
    .articles-box {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      margin-bottom: 20px;
    }

    .links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 12px;
    }

    .links-grid a {
      background: var(--bg-soft);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.88rem;
      color: var(--text-sub);
      border: 1px solid var(--border-color);
    }

    .links-grid a:hover {
      border-color: var(--primary-laser);
      color: var(--primary-laser);
    }

    /* 联系我们与加盟 */
    .contact-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      align-items: center;
    }

    .contact-info-list {
      list-style: none;
      font-size: 1rem;
      color: var(--text-main);
    }

    .contact-info-list li {
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .qr-container {
      text-align: center;
      padding: 20px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      max-width: 220px;
      margin: 0 auto;
    }

    .qr-container img {
      width: 100%;
      height: auto;
      border-radius: 6px;
    }

    .qr-title {
      font-size: 0.9rem;
      font-weight: 600;
      margin-top: 10px;
      color: var(--text-sub);
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px 0;
      color: var(--text-sub);
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
    }

    .footer-copy {
      text-align: center;
      font-size: 0.88rem;
      margin-top: 24px;
    }

    /* 浮动客服 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3d5afe, #7c4dff);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 16px rgba(61, 90, 254, 0.3);
      cursor: pointer;
      font-size: 0.85rem;
      font-weight: 700;
      transition: 0.3s;
      border: none;
    }

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

    /* 响应式断点 */
    @media (max-width: 992px) {
      .metric-grid, .flow-steps, .banner-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .token-grid, .review-cards, .contact-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        gap: 8px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.05);
      }
      .nav-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2.2rem;
      }
    }

    @media (max-width: 640px) {
      .metric-grid, .flow-steps, .banner-grid, .media-gallery {
        grid-template-columns: 1fr;
      }
      .card-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .section-wrap {
        padding: 50px 0;
      }
    }