:root {
      --bg-base: #f7f9fe;
      --bg-surface: #ffffff;
      --bg-alt: #f0f4fc;
      --text-main: #141a29;
      --text-muted: #5e6b82;
      --brand-neon-purple: #7928ca;
      --brand-neon-cyan: #0070f3;
      --brand-neon-pink: #ff0080;
      --brand-neon-lime: #00df8f;
      --border-color: rgba(121, 40, 202, 0.16);
      --card-shadow: 0 10px 30px rgba(0, 112, 243, 0.08);
      --card-hover-shadow: 0 20px 40px rgba(121, 40, 202, 0.16);
      --container-width: 1200px;
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

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

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

    body {
      background-color: var(--bg-base);
      background-image: 
        radial-gradient(at 0% 0%, rgba(0, 112, 243, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(255, 0, 128, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(0, 223, 143, 0.05) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition-smooth);
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      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(16px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 20px 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 img.ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: 6px;
      position: relative;
    }

    .nav-links li a:hover {
      color: var(--brand-neon-purple);
      background: rgba(121, 40, 202, 0.05);
    }

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

    .btn-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      color: #ffffff;
      background: linear-gradient(135deg, #7928ca 0%, #0070f3 100%);
      border-radius: 30px;
      box-shadow: 0 4px 14px rgba(121, 40, 202, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.4);
      cursor: pointer;
      white-space: nowrap;
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 112, 243, 0.45);
      color: #ffffff;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--brand-neon-purple);
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid var(--brand-neon-purple);
      border-radius: 30px;
    }

    .btn-outline:hover {
      background: var(--brand-neon-purple);
      color: #ffffff;
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle span {
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      border-radius: 2px;
    }

    /* 首屏 Hero 区：无图片 */
    .hero-section {
      padding: 90px 0 70px;
      position: relative;
      text-align: center;
    }

    .badge-capsule {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(121, 40, 202, 0.08);
      border: 1px solid rgba(121, 40, 202, 0.25);
      border-radius: 50px;
      font-size: 13px;
      font-weight: 600;
      color: var(--brand-neon-purple);
      margin-bottom: 24px;
    }

    .badge-capsule .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--brand-neon-pink);
      box-shadow: 0 0 10px var(--brand-neon-pink);
    }

    .hero-title {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span.neon-glow {
      background: linear-gradient(90deg, #7928ca, #0070f3, #ff0080);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
    }

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

    .hero-cta-group .btn-lg {
      padding: 14px 34px;
      font-size: 16px;
    }

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

    .metric-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px 20px;
      box-shadow: var(--card-shadow);
      text-align: center;
      transition: var(--transition-smooth);
    }

    .metric-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-hover-shadow);
      border-color: var(--brand-neon-cyan);
    }

    .metric-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--brand-neon-purple);
      margin-bottom: 6px;
    }

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

    /* 模块通用标题 */
    .section-spacing {
      padding: 80px 0;
    }

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

    .section-eyebrow {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--brand-neon-cyan);
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 平台介绍 */
    .about-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 40px;
      box-shadow: var(--card-shadow);
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--brand-neon-purple);
    }

    .about-text p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 16px;
      text-align: justify;
    }

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

    .about-pill {
      background: rgba(0, 112, 243, 0.08);
      color: var(--brand-neon-cyan);
      border: 1px solid rgba(0, 112, 243, 0.2);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
    }

    .about-model-cloud {
      background: var(--bg-alt);
      border-radius: 16px;
      padding: 24px;
      border: 1px solid rgba(121, 40, 202, 0.12);
    }

    .cloud-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

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

    .model-tag {
      background: #ffffff;
      border: 1px solid rgba(0, 0, 0, 0.06);
      padding: 5px 12px;
      border-radius: 8px;
      font-size: 12px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
      transition: var(--transition-smooth);
    }

    .model-tag:hover {
      background: var(--brand-neon-purple);
      color: #ffffff;
      transform: scale(1.05);
    }

    /* 场景卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 18px;
      padding: 30px 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
      border-color: var(--brand-neon-pink);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(121, 40, 202, 0.1), rgba(0, 112, 243, 0.15));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      color: var(--brand-neon-purple);
      font-weight: bold;
    }

    .service-card h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

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

    /* 媒体展示 */
    .media-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-top: 30px;
    }

    .media-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 18px;
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }

    .media-card .img-wrapper {
      width: 100%;
      background: var(--bg-alt);
      overflow: hidden;
    }

    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition-smooth);
    }

    .media-card:hover img {
      transform: scale(1.02);
    }

    .media-desc {
      padding: 16px 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

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

    .timeline-step {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 28px 20px;
      position: relative;
      box-shadow: var(--card-shadow);
    }

    .step-number {
      font-size: 14px;
      font-weight: 800;
      color: var(--brand-neon-pink);
      margin-bottom: 12px;
      display: inline-block;
      padding: 4px 10px;
      background: rgba(255, 0, 128, 0.08);
      border-radius: 20px;
    }

    .timeline-step h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 对比评测表格 */
    .comparison-wrapper {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 30px;
      box-shadow: var(--card-shadow);
      overflow-x: auto;
    }

    .review-scorecard {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 24px;
      background: linear-gradient(135deg, rgba(121, 40, 202, 0.06), rgba(0, 112, 243, 0.06));
      border: 1px solid rgba(121, 40, 202, 0.2);
      border-radius: 14px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-stars {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      font-weight: 700;
      color: var(--brand-neon-purple);
    }

    .score-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--brand-neon-pink);
    }

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

    .table-responsive th, .table-responsive td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(0,0,0,0.06);
      font-size: 14px;
    }

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

    .highlight-col {
      background: rgba(121, 40, 202, 0.03);
      font-weight: 600;
      color: var(--brand-neon-purple);
    }

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

    .review-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 18px;
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-quote {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(0,0,0,0.06);
      padding-top: 16px;
    }

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--brand-neon-purple), var(--brand-neon-cyan));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

    .author-info h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 文章专区 */
    .articles-wrapper {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 32px;
      box-shadow: var(--card-shadow);
    }

    .articles-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-item {
      background: var(--bg-alt);
      border: 1px solid rgba(0,0,0,0.06);
      padding: 10px 16px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .article-item:hover {
      border-color: var(--brand-neon-purple);
      color: var(--brand-neon-purple);
      background: #ffffff;
    }

    /* 表单与联系区 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: start;
    }

    .form-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 36px;
      box-shadow: var(--card-shadow);
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid rgba(0,0,0,0.12);
      border-radius: 10px;
      font-size: 14px;
      outline: none;
      transition: var(--transition-smooth);
      background: #fafcff;
    }

    .form-control:focus {
      border-color: var(--brand-neon-cyan);
      box-shadow: 0 0 0 3px rgba(0, 112, 243, 0.15);
      background: #ffffff;
    }

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

    .contact-details {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 36px;
      box-shadow: var(--card-shadow);
    }

    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 20px;
      font-size: 15px;
    }

    .qr-container {
      margin-top: 24px;
      padding: 20px;
      background: var(--bg-alt);
      border-radius: 12px;
      text-align: center;
      max-width: 220px;
    }

    .qr-container img {
      width: 160px;
      height: 160px;
      object-fit: contain;
      border-radius: 8px;
      margin-bottom: 10px;
      background: #ffffff;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-accordion-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
    }

    .faq-header {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-header span.arrow {
      transition: transform 0.3s ease;
      font-size: 12px;
      color: var(--brand-neon-purple);
    }

    .faq-accordion-item.active .faq-header span.arrow {
      transform: rotate(180deg);
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-accordion-item.active .faq-body {
      max-height: 300px;
      padding-bottom: 20px;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 20px;
      color: var(--text-main);
    }

    .footer-links-box {
      border-bottom: 1px solid rgba(0,0,0,0.06);
      padding-bottom: 24px;
      margin-bottom: 24px;
    }

    .footer-links-title {
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .footer-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .footer-links-list a {
      font-size: 13px;
      color: var(--text-muted);
    }

    .footer-links-list a:hover {
      color: var(--brand-neon-purple);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 13px;
      color: var(--text-muted);
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 浮动客服入口 */
    .floating-support {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 16px rgba(0,0,0,0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 18px;
      color: var(--brand-neon-purple);
      transition: var(--transition-smooth);
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--brand-neon-purple);
      color: #ffffff;
    }

    /* 响应式样式 */
    @media (max-width: 1024px) {
      .services-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: flex;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .about-grid, .contact-container {
        grid-template-columns: 1fr;
      }
      .services-grid, .reviews-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }