:root {
      --bg-base: #0a0b14;
      --bg-surface: #121324;
      --bg-card: rgba(22, 25, 46, 0.7);
      --bg-card-hover: rgba(30, 35, 66, 0.85);
      --text-main: #f0f2fd;
      --text-muted: #959cb8;
      --neon-cyan: #00f0ff;
      --neon-pink: #ff007f;
      --neon-purple: #8b00ff;
      --neon-blue: #0077fe;
      --border-glow: rgba(0, 240, 255, 0.25);
      --border-pink: rgba(255, 0, 127, 0.3);
      --max-width: 1240px;
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(139, 0, 255, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 240, 255, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(255, 0, 127, 0.05) 0%, transparent 60%);
      background-attachment: fixed;
      overflow-x: hidden;
    }

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

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 11, 20, 0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
    }

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

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

    .brand-area img.ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #fff;
      text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
    }

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.92rem;
      color: var(--text-muted);
      border-radius: 6px;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.08);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
    }

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

    .btn-neon-cyan {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #05060b;
      background: var(--neon-cyan);
      border-radius: 30px;
      border: 1px solid var(--neon-cyan);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
      cursor: pointer;
    }

    .btn-neon-cyan:hover {
      background: #33f3ff;
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }

    .btn-neon-pink {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #fff;
      background: transparent;
      border: 1px solid var(--neon-pink);
      border-radius: 30px;
      box-shadow: 0 0 16px rgba(255, 0, 127, 0.3);
      cursor: pointer;
    }

    .btn-neon-pink:hover {
      background: var(--neon-pink);
      box-shadow: 0 0 26px rgba(255, 0, 127, 0.6);
      transform: translateY(-2px);
    }

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

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

    /* 区域公用 */
    section {
      padding: 72px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--neon-cyan);
      padding: 4px 14px;
      border-radius: 20px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid rgba(0, 240, 255, 0.25);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto;
    }

    /* 首屏 Hero (无图片) */
    .hero-section {
      padding: 100px 0 80px;
      text-align: center;
      position: relative;
      background: radial-gradient(ellipse at 50% -10%, rgba(0, 240, 255, 0.18) 0%, transparent 65%);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(255, 0, 127, 0.12);
      border: 1px solid rgba(255, 0, 127, 0.35);
      border-radius: 30px;
      font-size: 0.88rem;
      color: #ff85c2;
      margin-bottom: 24px;
      box-shadow: 0 0 16px rgba(255, 0, 127, 0.2);
    }

    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 800;
      line-height: 1.25;
      color: #ffffff;
      margin-bottom: 20px;
      text-shadow: 0 0 25px rgba(0, 240, 255, 0.3);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 980px;
      margin: 0 auto;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      padding: 24px 16px;
      border-radius: var(--radius);
      backdrop-filter: blur(10px);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-pink);
      box-shadow: 0 8px 24px rgba(255, 0, 127, 0.2);
    }

    .stat-val {
      font-size: 2rem;
      font-weight: 800;
      color: var(--neon-cyan);
      margin-bottom: 4px;
      font-family: monospace;
    }

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

    /* 平台矩阵 */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }

    .model-tag {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: #cad2ee;
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
      transform: translateY(-2px);
    }

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

    .feature-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      backdrop-filter: blur(12px);
    }

    .feature-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 10px 30px rgba(0, 240, 255, 0.18);
      transform: translateY(-5px);
    }

    .card-icon-title {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: 700;
      background: rgba(0, 240, 255, 0.1);
      color: var(--neon-cyan);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: #fff;
    }

    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .card-meta {
      font-size: 0.82rem;
      color: var(--neon-pink);
      display: flex;
      align-items: center;
      gap: 6px;
    }

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

    .step-item {
      background: var(--bg-card);
      border: 1px solid rgba(0, 240, 255, 0.15);
      border-radius: var(--radius);
      padding: 24px 20px;
      position: relative;
      text-align: center;
    }

    .step-num {
      width: 38px;
      height: 38px;
      line-height: 38px;
      border-radius: 50%;
      background: var(--neon-cyan);
      color: #0a0b14;
      font-weight: 800;
      margin: 0 auto 16px;
      box-shadow: 0 0 16px rgba(0, 240, 255, 0.5);
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

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

    /* 对比评测模块 */
    .review-summary-card {
      background: linear-gradient(135deg, rgba(0, 240, 255, 0.1) 0%, rgba(255, 0, 127, 0.1) 100%);
      border: 1px solid var(--neon-cyan);
      border-radius: var(--radius);
      padding: 30px;
      text-align: center;
      margin-bottom: 32px;
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.15);
    }

    .rating-badge {
      display: inline-block;
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--neon-cyan);
      text-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
      margin-bottom: 8px;
    }

    .rating-stars {
      color: #ffb800;
      font-size: 1.3rem;
      letter-spacing: 4px;
      margin-bottom: 12px;
    }

    .table-wrap {
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.92rem;
    }

    .compare-table th {
      background: rgba(18, 19, 36, 0.95);
      color: #fff;
      font-weight: 700;
    }

    .compare-table tr:hover {
      background: rgba(255, 255, 255, 0.02);
    }

    .highlight-col {
      color: var(--neon-cyan);
      font-weight: 600;
      background: rgba(0, 240, 255, 0.03);
    }

    /* 案例展示画廊 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .gallery-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: var(--transition);
    }

    .gallery-card:hover {
      border-color: var(--neon-pink);
      transform: translateY(-4px);
    }

    .gallery-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #000;
    }

    .gallery-img-wrap.square {
      aspect-ratio: 1/1;
    }

    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .gallery-card:hover .gallery-img-wrap img {
      transform: scale(1.04);
    }

    .gallery-info {
      padding: 18px;
    }

    .gallery-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 6px;
    }

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

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

    .review-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.07);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 14px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(45deg, var(--neon-blue), var(--neon-pink));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
      font-size: 0.9rem;
    }

    .author-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: #fff;
    }

    .author-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--neon-cyan);
      box-shadow: 0 4px 20px rgba(0, 240, 255, 0.12);
    }

    .faq-question {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 1.02rem;
      font-weight: 600;
      color: #fff;
      user-select: none;
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--neon-cyan);
      transition: var(--transition);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background: rgba(10, 11, 20, 0.4);
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 表单与需求匹配 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: var(--bg-card);
      border: 1px solid rgba(0, 240, 255, 0.2);
      border-radius: var(--radius);
      padding: 40px;
      backdrop-filter: blur(16px);
    }

    .contact-info h3 {
      font-size: 1.5rem;
      color: #fff;
      margin-bottom: 16px;
    }

    .contact-info p {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.6;
    }

    .contact-details {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      font-size: 0.92rem;
    }

    .contact-details li span {
      color: var(--neon-cyan);
      font-weight: 600;
      display: inline-block;
      width: 90px;
    }

    .qr-container {
      margin-top: 20px;
      display: inline-block;
      padding: 10px;
      background: #fff;
      border-radius: 8px;
    }

    .qr-container img {
      width: 110px;
      height: 110px;
      display: block;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: #cad2ee;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(10, 11, 20, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 8px;
      color: #fff;
      font-size: 0.92rem;
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
    }

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

    /* 资讯列表 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .article-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-3px);
    }

    .article-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .article-summary {
      font-size: 0.86rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.5;
    }

    .article-link {
      font-size: 0.85rem;
      color: var(--neon-cyan);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 友情链接与页脚 */
    .friend-links-area {
      padding: 30px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.88rem;
    }

    .friend-links-title {
      color: var(--neon-cyan);
      font-weight: 600;
      margin-bottom: 12px;
    }

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

    .links-flex a {
      color: var(--text-muted);
      padding: 4px 10px;
      background: rgba(255, 255, 255, 0.04);
      border-radius: 4px;
    }

    .links-flex a:hover {
      color: #fff;
      background: rgba(0, 240, 255, 0.15);
    }

    .site-footer {
      background: #06070c;
      border-top: 1px solid rgba(0, 240, 255, 0.15);
      padding: 40px 0 28px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .footer-copy {
      color: var(--text-muted);
    }

    .footer-nav {
      display: flex;
      gap: 18px;
    }

    /* 悬浮客服 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
    }

    .kefu-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
      box-shadow: 0 0 20px rgba(255, 0, 127, 0.6);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 0.9rem;
      cursor: pointer;
      transition: var(--transition);
      user-select: none;
    }

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

    .kefu-popover {
      position: absolute;
      bottom: 64px;
      right: 0;
      background: #121324;
      border: 1px solid var(--neon-pink);
      padding: 16px;
      border-radius: var(--radius);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
      display: none;
      flex-direction: column;
      align-items: center;
      width: 170px;
      text-align: center;
    }

    .kefu-popover.show {
      display: flex;
    }

    .kefu-popover img {
      width: 130px;
      height: 130px;
      border-radius: 6px;
      margin-bottom: 8px;
    }

    .kefu-popover span {
      font-size: 0.8rem;
      color: var(--text-main);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .grid-3, .gallery-grid, .reviews-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid, .steps-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #0c0d18;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid rgba(0, 240, 255, 0.2);
        display: none;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .grid-3, .gallery-grid, .reviews-grid, .articles-grid {
        grid-template-columns: 1fr;
      }
      .hero-stats-grid, .steps-container {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.7rem;
      }
    }