:root {
      --bg-base: #0a0614;
      --bg-card: #130d24;
      --bg-card-hover: #1c1333;
      --bg-card-glass: rgba(19, 13, 36, 0.85);
      --accent-pink: #ff2a8d;
      --accent-purple: #9d4edd;
      --accent-cyan: #00f2fe;
      --accent-amber: #ffaa00;
      --text-main: #f8fafc;
      --text-muted: #cbd5e1;
      --text-dim: #94a3b8;
      --border-color: rgba(255, 42, 141, 0.25);
      --border-glow: rgba(157, 78, 221, 0.4);
      --gradient-cyber: linear-gradient(135deg, #ff2a8d 0%, #9d4edd 50%, #00f2fe 100%);
      --gradient-btn: linear-gradient(90deg, #ff2a8d, #9d4edd);
      --glow-pink: 0 0 20px rgba(255, 42, 141, 0.45);
      --glow-cyan: 0 0 20px rgba(0, 242, 254, 0.35);
      --container-width: 1200px;
    }

    * {
      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(circle at 10% 20%, rgba(255, 42, 141, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 242, 254, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(157, 78, 221, 0.05) 0%, transparent 60%);
      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: all 0.3s ease;
    }

    /* 全局容器统一规范 */
    .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 {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 6, 20, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
      filter: drop-shadow(0 0 8px rgba(255, 42, 141, 0.6));
    }

    .brand-text-name {
      font-size: 1.25rem;
      font-weight: 700;
      background: var(--gradient-cyber);
      -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-item a {
      padding: 8px 14px;
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
      border-radius: 6px;
      display: inline-block;
    }

    .nav-item a:hover {
      color: #ffffff;
      background: rgba(255, 42, 141, 0.15);
      text-shadow: 0 0 8px var(--accent-pink);
    }

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

    .btn-nav-primary {
      padding: 8px 18px;
      background: var(--gradient-btn);
      color: #fff;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 20px;
      box-shadow: var(--glow-pink);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(255, 42, 141, 0.7);
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 1px solid var(--border-color);
      color: #fff;
      padding: 6px 12px;
      border-radius: 6px;
      cursor: pointer;
    }

    /* 区域通用样式 */
    .section-spacing {
      padding: 80px 0;
      position: relative;
    }

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

    .section-eyebrow {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--accent-cyan);
      padding: 4px 14px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.3);
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: #ffffff;
      line-height: 1.3;
      margin-bottom: 14px;
    }

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

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-dim);
      max-width: 720px;
      margin: 0 auto;
    }

    /* 首屏 HERO (严格无图片) */
    .hero-section {
      padding: 90px 0 80px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid rgba(255, 42, 141, 0.15);
    }

    .hero-content {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(255, 42, 141, 0.12);
      border: 1px solid rgba(255, 42, 141, 0.35);
      border-radius: 30px;
      font-size: 0.88rem;
      color: var(--accent-pink);
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(255, 42, 141, 0.2);
    }

    .hero-badge-pulse {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-cyan);
      box-shadow: 0 0 8px var(--accent-cyan);
      animation: pulseAnim 1.8s infinite;
    }

    @keyframes pulseAnim {
      0% { transform: scale(0.95); opacity: 0.6; }
      50% { transform: scale(1.3); opacity: 1; }
      100% { transform: scale(0.95); opacity: 0.6; }
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      color: #ffffff;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .glow-highlight {
      background: var(--gradient-cyber);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 0 30px rgba(255, 42, 141, 0.3);
    }

    .hero-lead {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 36px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-hero-main {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 34px;
      background: var(--gradient-btn);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 30px;
      box-shadow: var(--glow-pink);
      border: 1px solid rgba(255, 255, 255, 0.3);
      transition: all 0.3s ease;
    }

    .btn-hero-main:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 0 35px rgba(255, 42, 141, 0.8);
    }

    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 28px;
      background: rgba(255, 255, 255, 0.05);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: 30px;
      border: 1px solid rgba(0, 242, 254, 0.4);
      box-shadow: var(--glow-cyan);
    }

    .btn-hero-secondary:hover {
      background: rgba(0, 242, 254, 0.15);
      transform: translateY(-2px);
    }

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

    .metric-card {
      background: var(--bg-card-glass);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 20px;
      text-align: center;
      transition: all 0.3s ease;
    }

    .metric-card:hover {
      border-color: var(--accent-pink);
      transform: translateY(-4px);
      box-shadow: var(--glow-pink);
    }

    .metric-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.85rem;
      color: var(--text-dim);
    }

    /* 卡片网格与组件库 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    .cyber-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 26px;
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .cyber-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--gradient-cyber);
      opacity: 0;
      transition: opacity 0.3s;
    }

    .cyber-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--accent-purple);
      transform: translateY(-4px);
      box-shadow: 0 10px 30px rgba(157, 78, 221, 0.2);
    }

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

    .card-icon-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(255, 42, 141, 0.12);
      border: 1px solid rgba(255, 42, 141, 0.3);
      color: var(--accent-pink);
      font-weight: 800;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型矩阵徽章云 */
    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      padding: 24px;
      background: var(--bg-card-glass);
      border: 1px solid var(--border-color);
      border-radius: 16px;
    }

    .model-chip {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(157, 78, 221, 0.3);
      color: var(--text-main);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 500;
      transition: all 0.25s;
    }

    .model-chip:hover {
      background: rgba(255, 42, 141, 0.2);
      border-color: var(--accent-pink);
      color: #fff;
      transform: scale(1.05);
      box-shadow: 0 0 12px rgba(255, 42, 141, 0.4);
    }

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

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }

    .step-num-badge {
      display: inline-block;
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--accent-cyan);
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.3);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
    }

    /* 对比评测高亮板块 */
    .benchmark-box {
      background: linear-gradient(180deg, #160f2e 0%, #0d091a 100%);
      border: 1px solid var(--accent-pink);
      border-radius: 18px;
      padding: 36px;
      box-shadow: 0 0 35px rgba(255, 42, 141, 0.15);
    }

    .benchmark-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      margin-bottom: 28px;
    }

    .rating-badge {
      display: flex;
      align-items: center;
      gap: 12px;
      background: rgba(255, 42, 141, 0.15);
      border: 1px solid var(--accent-pink);
      padding: 8px 18px;
      border-radius: 30px;
    }

    .rating-stars {
      color: #ffb703;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .rating-score {
      font-size: 1.3rem;
      font-weight: 800;
      color: #ffffff;
    }

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

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

    .cyber-table th, .cyber-table td {
      padding: 14px 18px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.95rem;
    }

    .cyber-table th {
      color: var(--accent-cyan);
      font-weight: 700;
      background: rgba(0, 0, 0, 0.2);
    }

    .cyber-table td {
      color: var(--text-muted);
    }

    .cyber-table tr:hover td {
      background: rgba(255, 42, 141, 0.05);
      color: #fff;
    }

    .tag-highlight {
      color: var(--accent-pink);
      font-weight: 700;
    }

    /* 图文素材容器 */
    .media-card-img-wrap {
      width: 100%;
      border-radius: 10px;
      overflow: hidden;
      margin-bottom: 16px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

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

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

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

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .faq-item.active {
      border-color: var(--accent-purple);
      box-shadow: 0 4px 20px rgba(157, 78, 221, 0.25);
    }

    .faq-header {
      padding: 18px 22px;
      font-weight: 600;
      font-size: 1.02rem;
      color: #ffffff;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

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

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

    .faq-body {
      padding: 0 22px 18px;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
      display: none;
    }

    .faq-item.active .faq-body {
      display: block;
    }

    /* 用户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--gradient-btn);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #fff;
      font-size: 1rem;
      border: 1px solid rgba(255, 255, 255, 0.4);
    }

    .review-name {
      font-size: 0.98rem;
      font-weight: 700;
      color: #fff;
    }

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

    .review-quote {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      font-style: italic;
    }

    /* 需求表单与联系 */
    .form-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--glow-pink);
    }

    .form-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      background: rgba(10, 6, 20, 0.8);
      border: 1px solid rgba(157, 78, 221, 0.4);
      border-radius: 8px;
      padding: 12px 16px;
      color: #ffffff;
      font-size: 0.95rem;
      outline: none;
      transition: all 0.3s;
    }

    .form-control:focus {
      border-color: var(--accent-pink);
      box-shadow: 0 0 12px rgba(255, 42, 141, 0.35);
    }

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

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: var(--gradient-btn);
      border: none;
      border-radius: 8px;
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      box-shadow: var(--glow-pink);
      transition: all 0.3s;
    }

    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(255, 42, 141, 0.7);
    }

    /* 文章列表 & 友情链接 */
    .articles-block {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 14px;
      margin-top: 20px;
    }

    .article-item-link {
      display: block;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(157, 78, 221, 0.25);
      border-radius: 8px;
      padding: 14px;
      color: var(--text-muted);
      font-size: 0.9rem;
      transition: all 0.3s;
    }

    .article-item-link:hover {
      background: rgba(255, 42, 141, 0.1);
      border-color: var(--accent-pink);
      color: #fff;
      transform: translateX(4px);
    }

    .footer {
      background: #06030c;
      border-top: 1px solid rgba(255, 42, 141, 0.2);
      padding: 60px 0 30px;
      margin-top: 60px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      position: relative;
    }

    .footer-links-list {
      list-style: none;
    }

    .footer-links-list li {
      margin-bottom: 10px;
    }

    .footer-links-list a {
      color: var(--text-dim);
      font-size: 0.9rem;
    }

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

    .qr-container {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }

    .qr-container img {
      width: 110px;
      height: 110px;
      border-radius: 8px;
      border: 1px solid var(--accent-pink);
      padding: 4px;
      background: #ffffff;
    }

    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      color: var(--text-dim);
      font-size: 0.85rem;
    }

    .friend-links-box {
      margin-top: 24px;
      padding: 16px;
      background: rgba(255, 255, 255, 0.02);
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-box a {
      color: var(--text-dim);
      font-size: 0.86rem;
    }

    .friend-links-box a:hover {
      color: var(--accent-cyan);
    }

    /* 浮动客服挂件 */
    .floating-kefu {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--gradient-btn);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--glow-pink);
      cursor: pointer;
      border: 1px solid rgba(255, 255, 255, 0.3);
      transition: transform 0.3s;
    }

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

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
      .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .process-timeline { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-metrics-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(10, 6, 20, 0.98);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active { display: flex; }
      .nav-item { width: 100%; }
      .nav-item a { display: block; padding: 10px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
      .hero-title { font-size: 1.8rem; }
      .hero-lead { font-size: 1rem; }
      .cards-grid-4, .cards-grid-3, .cards-grid-2, .reviews-grid, .process-timeline, .footer-grid, .form-grid-2 {
        grid-template-columns: 1fr;
      }
      .section-title { font-size: 1.7rem; }
      .benchmark-box { padding: 20px; }
      .form-wrapper { padding: 20px; }
    }