:root {
      --bg-dark: #070614;
      --bg-card: rgba(22, 17, 43, 0.75);
      --bg-card-hover: rgba(36, 26, 71, 0.85);
      --neon-pink: #ff2a85;
      --neon-purple: #9d4edd;
      --neon-cyan: #00f0ff;
      --neon-gradient: linear-gradient(135deg, #ff2a85 0%, #9d4edd 50%, #00f0ff 100%);
      --text-main: #f3f4f8;
      --text-muted: #a5a6c2;
      --border-glow: rgba(255, 42, 133, 0.28);
      --border-cyan-glow: rgba(0, 240, 255, 0.28);
      --container-width: 1200px;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background-color: var(--bg-dark);
      background-image: 
        radial-gradient(circle at 15% 20%, rgba(157, 78, 221, 0.18) 0%, transparent 40%),
        radial-gradient(circle at 85% 60%, rgba(255, 42, 133, 0.15) 0%, transparent 45%),
        radial-gradient(circle at 50% 90%, rgba(0, 240, 255, 0.12) 0%, transparent 50%);
      background-attachment: fixed;
      line-height: 1.65;
      overflow-x: hidden;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 6, 20, 0.88);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(157, 78, 221, 0.25);
    }

    .header-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-title {
      font-size: 1.35rem;
      font-weight: 800;
      background: var(--neon-gradient);
      -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 li a,
    .nav-links .ai-page-home-link {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      transition: var(--transition);
      border-radius: 6px;
    }

    .nav-links li a:hover,
    .nav-links .ai-page-home-link:hover {
      color: #ffffff;
      background: rgba(255, 42, 133, 0.15);
      text-shadow: 0 0 8px rgba(255, 42, 133, 0.6);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .btn-nav-primary {
      padding: 9px 20px;
      background: linear-gradient(135deg, #ff2a85 0%, #9d4edd 100%);
      color: #ffffff;
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 30px;
      box-shadow: 0 0 15px rgba(255, 42, 133, 0.45);
      transition: var(--transition);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 22px rgba(255, 42, 133, 0.7);
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--neon-purple);
      color: var(--text-main);
      padding: 6px 12px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 1.1rem;
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 30px;
      background: rgba(157, 78, 221, 0.15);
      border: 1px solid rgba(255, 42, 133, 0.4);
      color: #00f0ff;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 0 16px rgba(157, 78, 221, 0.25);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #ffffff 10%, #ff7ac3 55%, #00f0ff 95%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      max-width: 820px;
      margin: 0 auto 36px;
      font-size: 1.12rem;
      color: var(--text-muted);
      line-height: 1.8;
    }

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

    .btn-main-glow {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      text-decoration: none;
      border-radius: 40px;
      background: linear-gradient(135deg, #ff2a85 0%, #9d4edd 50%, #00f0ff 100%);
      background-size: 200% 200%;
      border: none;
      box-shadow: 0 0 25px rgba(255, 42, 133, 0.6), inset 0 0 10px rgba(255, 255, 255, 0.3);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      animation: neonGlow 4s ease infinite;
    }

    .btn-main-glow:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 0 35px rgba(0, 240, 255, 0.8);
    }

    .btn-outline-glow {
      padding: 13px 30px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #ffffff;
      text-decoration: none;
      border-radius: 40px;
      background: rgba(22, 17, 43, 0.6);
      border: 1px solid var(--neon-cyan);
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.25);
      transition: var(--transition);
    }

    .btn-outline-glow:hover {
      background: rgba(0, 240, 255, 0.15);
      border-color: #ffffff;
      transform: translateY(-3px);
    }

    @keyframes neonGlow {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }

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

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      padding: 24px 16px;
      border-radius: 16px;
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-cyan);
      box-shadow: 0 10px 30px rgba(0, 240, 255, 0.2);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: #ff2a85;
      margin-bottom: 4px;
      text-shadow: 0 0 10px rgba(255, 42, 133, 0.4);
    }

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

    /* 模型矩阵展示条 */
    .models-marquee-section {
      padding: 24px 0 45px;
      border-bottom: 1px solid rgba(157, 78, 221, 0.15);
    }

    .models-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-tag {
      background: rgba(22, 17, 43, 0.6);
      border: 1px solid rgba(157, 78, 221, 0.35);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: #d1cbe5;
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--neon-pink);
      color: #ffffff;
      background: rgba(255, 42, 133, 0.2);
      transform: scale(1.05);
    }

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

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

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--neon-cyan);
      margin-bottom: 10px;
      text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 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: 30px;
      align-items: center;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 18px;
      padding: 30px 24px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--neon-gradient);
      opacity: 0;
      transition: var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-6px);
      background: var(--bg-card-hover);
      border-color: rgba(255, 42, 133, 0.6);
      box-shadow: 0 12px 30px rgba(157, 78, 221, 0.25);
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(255, 42, 133, 0.15);
      border: 1px solid var(--neon-pink);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: #ffffff;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 1.22rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 图文与素材展示区 */
    .media-card {
      background: var(--bg-card);
      border: 1px solid rgba(157, 78, 221, 0.3);
      border-radius: 16px;
      overflow: hidden;
      transition: var(--transition);
    }

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

    .media-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #110e24;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.03);
    }

    .media-body {
      padding: 20px;
    }

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

    .process-item {
      background: var(--bg-card);
      border: 1px solid rgba(0, 240, 255, 0.2);
      border-radius: 16px;
      padding: 28px 20px;
      text-align: center;
      position: relative;
    }

    .process-step-num {
      font-size: 2.2rem;
      font-weight: 900;
      color: rgba(0, 240, 255, 0.25);
      position: absolute;
      top: 12px;
      right: 16px;
      line-height: 1;
    }

    .process-icon-box {
      width: 52px;
      height: 52px;
      margin: 0 auto 16px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid var(--neon-cyan);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: #00f0ff;
    }

    /* 对比评测表格 */
    .compare-container {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 20px;
      padding: 36px;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      background: linear-gradient(90deg, rgba(255, 42, 133, 0.15), rgba(157, 78, 221, 0.15));
      border: 1px solid rgba(255, 42, 133, 0.35);
      border-radius: 14px;
      padding: 20px 28px;
      margin-bottom: 30px;
    }

    .rating-score-box {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .score-val {
      font-size: 2.8rem;
      font-weight: 900;
      color: #ff2a85;
      text-shadow: 0 0 12px rgba(255, 42, 133, 0.6);
    }

    .score-max {
      font-size: 1.1rem;
      color: var(--text-muted);
    }

    .stars {
      color: #ffb703;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(157, 78, 221, 0.2);
    }

    .compare-table th {
      font-weight: 700;
      color: #ffffff;
      background: rgba(157, 78, 221, 0.12);
    }

    .compare-table td.highlight {
      color: #00f0ff;
      font-weight: 600;
      background: rgba(0, 240, 255, 0.04);
    }

    /* 需求匹配与表单 */
    .form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 20px;
      padding: 36px;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    }

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

    .form-label {
      display: block;
      font-size: 0.92rem;
      font-weight: 600;
      color: #e2e3f0;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(7, 6, 20, 0.8);
      border: 1px solid rgba(157, 78, 221, 0.4);
      border-radius: 8px;
      color: #ffffff;
      font-size: 0.95rem;
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: var(--neon-pink);
      box-shadow: 0 0 12px rgba(255, 42, 133, 0.4);
    }

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

    .btn-submit {
      width: 100%;
      padding: 14px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      background: var(--neon-gradient);
      border: none;
      border-radius: 8px;
      cursor: pointer;
      box-shadow: 0 0 20px rgba(255, 42, 133, 0.4);
      transition: var(--transition);
    }

    .btn-submit:hover {
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.6);
      transform: translateY(-2px);
    }

    /* FAQ 手风琴 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid rgba(157, 78, 221, 0.25);
      border-radius: 12px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: var(--neon-cyan);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1.02rem;
      font-weight: 600;
      color: #ffffff;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: rgba(7, 6, 20, 0.5);
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 22px;
      border-top: 1px solid rgba(157, 78, 221, 0.15);
    }

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

    /* 客户评价卡片 */
    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .testimonial-card:hover {
      transform: translateY(-5px);
      border-color: var(--neon-cyan);
      box-shadow: 0 10px 25px rgba(0, 240, 255, 0.2);
    }

    .testimonial-quote {
      font-size: 0.94rem;
      color: #dedff0;
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(157, 78, 221, 0.2);
      padding-top: 16px;
    }

    .author-avatar-text {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--neon-gradient);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }

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

    .author-role {
      font-size: 0.82rem;
      color: var(--neon-cyan);
    }

    /* 文章列表组件 */
    .article-box {
      background: var(--bg-card);
      border: 1px solid rgba(157, 78, 221, 0.3);
      border-radius: 16px;
      padding: 24px;
    }

    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }

    .article-links-list a {
      color: #d1cbe5;
      text-decoration: none;
      font-size: 0.94rem;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }

    .article-links-list a:hover {
      color: var(--neon-pink);
      transform: translateX(5px);
    }

    /* 联系我们 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .contact-info-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 20px;
      padding: 36px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 22px;
    }

    .contact-icon {
      font-size: 1.3rem;
      color: var(--neon-cyan);
      margin-top: 2px;
    }

    .qr-box {
      margin-top: 20px;
      text-align: center;
      padding: 20px;
      background: rgba(7, 6, 20, 0.6);
      border-radius: 12px;
      border: 1px solid rgba(157, 78, 221, 0.3);
      display: inline-block;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      border-radius: 8px;
      display: block;
      margin: 0 auto 10px;
    }

    /* 页脚 */
    footer.site-footer {
      background: #04030a;
      border-top: 1px solid rgba(157, 78, 221, 0.3);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 36px;
    }

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

    .footer-links-list a {
      color: var(--text-muted);
      text-decoration: none;
      transition: var(--transition);
    }

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

    .friend-links-wrap {
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.92rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .friend-links-container {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .friend-links-container a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.86rem;
      transition: var(--transition);
    }

    .friend-links-container a:hover {
      color: var(--neon-pink);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.85rem;
    }

    /* 悬浮客服与返回顶部 */
    .float-widgets {
      position: fixed;
      right: 24px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-card);
      border: 1px solid var(--neon-pink);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      cursor: pointer;
      box-shadow: 0 0 15px rgba(255, 42, 133, 0.4);
      transition: var(--transition);
      text-decoration: none;
    }

    .float-btn:hover {
      background: var(--neon-pink);
      transform: scale(1.1);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-3, .grid-4, .process-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-2, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: rgba(7, 6, 20, 0.98);
        border-bottom: 1px solid var(--neon-purple);
        flex-direction: column;
        padding: 20px 0;
      }
      .nav-links.active { display: flex; }
      .nav-links li a, .nav-links .ai-page-home-link { width: 100%; text-align: center; padding: 12px; }
      .hero-title { font-size: 1.8rem; }
      .hero-stats-grid, .grid-3, .grid-4, .process-grid { grid-template-columns: 1fr; }
      .hero-cta-group { flex-direction: column; width: 100%; }
      .btn-main-glow, .btn-outline-glow { width: 100%; justify-content: center; }
    }