:root {
      --bg-dark: #07060e;
      --bg-card: rgba(22, 16, 42, 0.75);
      --bg-card-hover: rgba(36, 26, 68, 0.85);
      --neon-pink: #ff2a85;
      --neon-purple: #9d3bff;
      --neon-cyan: #00f0ff;
      --text-main: #f5f2ff;
      --text-muted: #aca5cd;
      --border-cyber: rgba(255, 42, 133, 0.28);
      --border-glow: rgba(157, 59, 255, 0.45);
      --gradient-cyber: linear-gradient(135deg, #ff2a85 0%, #9d3bff 50%, #00f0ff 100%);
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-dark);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-dark);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(255, 42, 133, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 65%, rgba(157, 59, 255, 0.15) 0%, transparent 45%),
        radial-gradient(circle at 50% 90%, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
      background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    .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(7, 6, 14, 0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-cyber);
    }

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

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

    .brand-area .ai-page-logo {
      height: 38px;
      width: auto;
      filter: drop-shadow(0 0 8px rgba(255, 42, 133, 0.6));
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.5px;
      background: var(--gradient-cyber);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li a {
      font-size: 14px;
      color: var(--text-muted);
      padding: 8px 12px;
      position: relative;
      display: block;
      font-weight: 500;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      text-shadow: 0 0 10px rgba(255, 42, 133, 0.8);
    }

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

    .btn-cyber {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      border-radius: 6px;
      font-weight: 600;
      font-size: 14px;
      transition: all 0.3s ease;
      cursor: pointer;
      text-align: center;
    }

    .btn-cyber-primary {
      background: linear-gradient(135deg, #ff2a85, #9d3bff);
      color: #fff;
      box-shadow: 0 0 18px rgba(255, 42, 133, 0.5);
      border: 1px solid rgba(255, 255, 255, 0.3);
    }

    .btn-cyber-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 28px rgba(255, 42, 133, 0.85);
      color: #fff;
    }

    .btn-cyber-outline {
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.05);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }

    .btn-cyber-outline:hover {
      background: var(--neon-cyan);
      color: #07060e;
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--neon-pink);
      color: #fff;
      padding: 6px 10px;
      border-radius: 4px;
      cursor: pointer;
      font-size: 18px;
    }

    /* Section 通用 */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 46px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--neon-cyan);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 20px;
      background: rgba(0, 240, 255, 0.08);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }

    .section-title span {
      background: var(--gradient-cyber);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 Hero 无图片纯科技质感 */
    .hero-section {
      padding: 90px 0 80px 0;
      position: relative;
      text-align: center;
      overflow: hidden;
    }

    .hero-glow-blob {
      position: absolute;
      width: 500px;
      height: 500px;
      border-radius: 50%;
      filter: blur(120px);
      z-index: 0;
      opacity: 0.35;
      pointer-events: none;
    }

    .hero-glow-1 {
      background: #ff2a85;
      top: -100px;
      left: 10%;
    }

    .hero-glow-2 {
      background: #8a2be2;
      top: 50px;
      right: 10%;
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      max-width: 880px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 50px;
      background: rgba(255, 42, 133, 0.12);
      border: 1px solid rgba(255, 42, 133, 0.4);
      color: #ff8ec2;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-h1 {
      font-size: 46px;
      line-height: 1.25;
      font-weight: 900;
      margin-bottom: 20px;
      color: #ffffff;
      text-shadow: 0 0 25px rgba(255, 42, 133, 0.35);
    }

    .hero-h1-gradient {
      background: var(--gradient-cyber);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.8;
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 10px;
      padding: 18px 12px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
      backdrop-filter: blur(8px);
      transition: transform 0.3s ease;
    }

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

    .stat-value {
      font-size: 26px;
      font-weight: 800;
      color: var(--neon-cyan);
      margin-bottom: 4px;
      font-family: monospace;
    }

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

    /* 品牌模型跑马灯标签 */
    .models-bar {
      background: rgba(18, 12, 34, 0.9);
      border-top: 1px solid var(--border-cyber);
      border-bottom: 1px solid var(--border-cyber);
      padding: 14px 0;
      overflow: hidden;
      white-space: nowrap;
    }

    .models-track {
      display: inline-flex;
      gap: 16px;
      animation: marquee 45s linear infinite;
    }

    .model-chip {
      background: rgba(255, 42, 133, 0.08);
      border: 1px solid rgba(255, 42, 133, 0.25);
      border-radius: 20px;
      padding: 4px 16px;
      font-size: 13px;
      color: #ded7f8;
      font-weight: 500;
    }

    @keyframes marquee {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }

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

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .cyber-box {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 12px;
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .cyber-box::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--gradient-cyber);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .cyber-box:hover {
      background: var(--bg-card-hover);
      transform: translateY(-4px);
      border-color: var(--neon-purple);
      box-shadow: 0 10px 30px rgba(157, 59, 255, 0.25);
    }

    .cyber-box:hover::before {
      opacity: 1;
    }

    .cyber-box-title {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .box-badge {
      font-size: 11px;
      padding: 2px 8px;
      background: rgba(255, 42, 133, 0.2);
      border: 1px solid var(--neon-pink);
      color: #ff8ec2;
      border-radius: 4px;
    }

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

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

    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 10px;
      padding: 22px;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--gradient-cyber);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 14px;
      box-shadow: 0 0 12px rgba(255, 42, 133, 0.6);
    }

    /* 对比评测表格 */
    .compare-container {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 12px;
      padding: 28px;
      overflow-x: auto;
    }

    .rating-summary-banner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 24px;
      background: linear-gradient(90deg, rgba(255, 42, 133, 0.15), rgba(157, 59, 255, 0.15));
      border: 1px solid var(--border-glow);
      border-radius: 10px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-left {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .stars-icon {
      color: #ffd700;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .rating-score-highlight {
      font-size: 32px;
      font-weight: 900;
      color: #00f0ff;
      font-family: monospace;
    }

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

    .compare-table th, 
    .compare-table td {
      padding: 14px 18px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14px;
    }

    .compare-table th {
      color: #fff;
      background: rgba(255, 42, 133, 0.1);
      font-weight: 700;
    }

    .compare-table tr:hover td {
      background: rgba(157, 59, 255, 0.08);
    }

    .col-highlight {
      color: #00f0ff;
      font-weight: 600;
    }

    /* 案例中心图片区 */
    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 10px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .case-img-wrap {
      width: 100%;
      background: #000;
      position: relative;
    }

    .case-img-wrap img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

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

    .case-content {
      padding: 18px;
      flex-grow: 1;
    }

    /* 表单与需求匹配 */
    .form-container {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 12px;
      padding: 36px;
      max-width: 800px;
      margin: 0 auto;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group-full {
      grid-column: span 2;
    }

    .form-label {
      display: block;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 6px;
      font-weight: 500;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      background: rgba(10, 8, 20, 0.8);
      border: 1px solid var(--border-cyber);
      border-radius: 6px;
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: border-color 0.25s;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--neon-pink);
      box-shadow: 0 0 10px rgba(255, 42, 133, 0.4);
    }

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

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

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 8px;
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .faq-item.active {
      border-color: var(--neon-purple);
      box-shadow: 0 4px 20px rgba(157, 59, 255, 0.2);
    }

    .faq-q {
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      color: #fff;
    }

    .faq-icon {
      font-size: 18px;
      color: var(--neon-pink);
      transition: transform 0.3s ease;
    }

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

    .faq-a {
      padding: 0 20px;
      max-height: 0;
      overflow: hidden;
      transition: all 0.3s ease;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-a {
      padding: 0 20px 18px 20px;
      max-height: 200px;
    }

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

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 10px;
      padding: 22px;
      position: relative;
    }

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

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff2a85, #00f0ff);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #fff;
    }

    .reviewer-info h4 {
      font-size: 15px;
      color: #fff;
    }

    .reviewer-info span {
      font-size: 12px;
      color: var(--neon-cyan);
    }

    .review-body {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 资讯与友情链接 */
    .articles-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 10px;
      padding: 24px;
      margin-bottom: 30px;
    }

    .article-links-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 14px;
    }

    .article-item-link {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #ded7f8;
      font-size: 14px;
      padding: 10px 14px;
      border-radius: 6px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .article-item-link:hover {
      background: rgba(255, 42, 133, 0.1);
      border-color: var(--neon-pink);
      color: #fff;
    }

    /* 宣传图画廊展示区 */
    .banner-gallery-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .banner-img-item {
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--border-cyber);
      background: #000;
    }

    .banner-img-item img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
      transition: transform 0.3s;
    }

    .banner-img-item:hover img {
      transform: scale(1.06);
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--gradient-cyber);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      box-shadow: 0 0 16px rgba(255, 42, 133, 0.7);
      cursor: pointer;
      transition: transform 0.25s;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    .float-popover {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #140d25;
      border: 1px solid var(--border-glow);
      border-radius: 10px;
      padding: 16px;
      text-align: center;
      width: 170px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
      display: none;
    }

    .float-popover img {
      width: 100%;
      height: auto;
      border-radius: 6px;
      margin-bottom: 8px;
      display: block;
    }

    .float-popover span {
      font-size: 12px;
      color: var(--neon-cyan);
    }

    .floating-contact-panel:hover .float-popover {
      display: block;
    }

    /* 页脚 */
    .site-footer {
      background: #040308;
      border-top: 1px solid var(--border-cyber);
      padding: 50px 0 30px 0;
      font-size: 14px;
      color: var(--text-muted);
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 16px;
      font-weight: 700;
    }

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

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

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

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }

    .friend-links-wrap a {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      color: var(--text-muted);
    }

    .friend-links-wrap a:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-h1 {
        font-size: 34px;
      }
      .grid-4, .hero-stats-grid, .steps-row, .banner-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .mobile-nav-active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #0d091a;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-cyber);
        gap: 0;
      }
      .mobile-nav-active li {
        width: 100%;
      }
      .mobile-nav-active li a {
        padding: 10px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      }
    }

    @media (max-width: 640px) {
      .hero-h1 {
        font-size: 26px;
      }
      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .steps-row, .reviews-grid, .banner-gallery-grid, .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .form-container {
        padding: 20px;
      }
    }