:root {
      --bg-main: #0c0817;
      --bg-surface: #140d28;
      --bg-card: rgba(27, 18, 54, 0.85);
      --bg-card-hover: rgba(39, 26, 75, 0.95);
      --border-color: rgba(236, 72, 153, 0.25);
      --border-glow: rgba(168, 85, 247, 0.45);
      --pink-neon: #ff2d88;
      --purple-neon: #a855f7;
      --cyan-neon: #00f0ff;
      --text-main: #f8fafc;
      --text-muted: #cbd5e1;
      --text-dim: #94a3b8;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-main);
      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;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 45, 136, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.12) 0%, transparent 40%);
      background-attachment: fixed;
    }

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(12, 8, 23, 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 {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo-wrap {
      max-width: 140px;
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 14px;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: 6px;
      display: block;
    }
    .nav-links li a:hover, .nav-links li a.active {
      color: #fff;
      background: rgba(255, 45, 136, 0.15);
      box-shadow: 0 0 10px rgba(255, 45, 136, 0.3);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      text-align: center;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--pink-neon) 0%, var(--purple-neon) 100%);
      color: #fff;
      box-shadow: 0 0 18px rgba(255, 45, 136, 0.45);
    }
    .btn-primary:hover {
      box-shadow: 0 0 25px rgba(255, 45, 136, 0.75);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      color: #fff;
      border-color: var(--border-color);
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--pink-neon);
      transform: translateY(-2px);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 90px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 30px;
      background: rgba(255, 45, 136, 0.12);
      border: 1px solid var(--pink-neon);
      color: #ff72b3;
      font-size: 13px;
      letter-spacing: 1px;
      margin-bottom: 24px;
      box-shadow: 0 0 12px rgba(255, 45, 136, 0.25);
    }
    .hero-title {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
      background: linear-gradient(180deg, #ffffff 30%, #e2e8f0 70%, #ff8cc0 100%);
      -webkit-background-clip: text;
      color: transparent;
      text-shadow: 0 0 30px rgba(168, 85, 247, 0.35);
    }
    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }
    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 16px;
      position: relative;
      overflow: hidden;
      transition: transform 0.3s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--pink-neon);
    }
    .metric-value {
      font-size: 32px;
      font-weight: 800;
      color: #00f0ff;
      margin-bottom: 6px;
      text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-dim);
    }

    /* 通用板块布局 */
    .section {
      padding: 80px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-tag {
      color: var(--pink-neon);
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 2px;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 15px;
      color: var(--text-dim);
      max-width: 640px;
      margin: 0 auto;
    }

    /* 网格卡片 */
    .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: 32px;
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
      transition: all 0.3s ease;
      position: relative;
    }
    .card:hover {
      border-color: var(--purple-neon);
      box-shadow: 0 8px 30px rgba(168, 85, 247, 0.15);
      transform: translateY(-4px);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(255, 45, 136, 0.15);
      border: 1px solid rgba(255, 45, 136, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--pink-neon);
      font-size: 20px;
      font-weight: bold;
    }
    .card-title {
      font-size: 18px;
      color: #fff;
      margin-bottom: 12px;
      font-weight: 600;
    }
    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 模型支持标签墙 */
    .tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }
    .model-tag {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(168, 85, 247, 0.3);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      color: #e2e8f0;
      transition: all 0.2s ease;
    }
    .model-tag:hover {
      background: var(--pink-neon);
      border-color: var(--pink-neon);
      color: #fff;
      transform: scale(1.05);
    }

    /* 流程组件 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
    }
    .step-num {
      width: 40px;
      height: 40px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--pink-neon), var(--purple-neon));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    /* 评测表格 */
    .eval-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      margin-top: 30px;
    }
    .eval-score-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding-bottom: 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-badge {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .score-num {
      font-size: 48px;
      font-weight: 900;
      color: var(--pink-neon);
      text-shadow: 0 0 15px rgba(255, 45, 136, 0.5);
    }
    .table-responsive {
      overflow-x: auto;
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 14px;
    }
    .eval-table th {
      color: var(--text-dim);
      font-weight: 600;
      background: rgba(255, 255, 255, 0.02);
    }
    .eval-table td {
      color: var(--text-muted);
    }
    .highlight-col {
      color: #ff72b3 !important;
      font-weight: 600;
    }

    /* 素材图片展示容器 */
    .image-showcase {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }
    .image-card {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: var(--bg-surface);
      aspect-ratio: 16 / 10;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .image-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .image-card:hover img {
      transform: scale(1.05);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: border-color 0.25s ease;
    }
    .faq-item.active {
      border-color: var(--purple-neon);
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-toggle-icon {
      font-size: 18px;
      color: var(--pink-neon);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      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-item.active .faq-answer {
      max-height: 500px;
      padding: 0 24px 20px;
    }

    /* 用户评论 */
    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-content {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 16px;
    }
    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--pink-neon), var(--purple-neon));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
      font-size: 14px;
    }
    .author-info h4 {
      font-size: 14px;
      color: #fff;
    }
    .author-info p {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 表单与联系 */
    .form-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      background: rgba(12, 8, 23, 0.7);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 12px 16px;
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: border-color 0.25s ease;
    }
    .form-control:focus {
      border-color: var(--pink-neon);
      box-shadow: 0 0 10px rgba(255, 45, 136, 0.2);
    }
    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }

    /* 文章调用展示 */
    .article-wrap {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      margin-top: 24px;
    }
    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }
    .article-link-item {
      display: inline-block;
      padding: 8px 16px;
      background: rgba(255, 255, 255, 0.04);
      border-radius: 6px;
      font-size: 13px;
      color: var(--cyan-neon);
      border: 1px solid rgba(0, 240, 255, 0.2);
    }
    .article-link-item:hover {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--cyan-neon);
    }

    /* 底部友情链接与版权 */
    .site-footer {
      background: #080510;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      color: var(--text-dim);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-about p {
      font-size: 13px;
      line-height: 1.8;
      margin-top: 14px;
      color: var(--text-muted);
    }
    .footer-heading {
      font-size: 15px;
      color: #fff;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-links-col {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-col li a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-links-col li a:hover {
      color: var(--pink-neon);
    }
    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 10px;
    }
    .friend-links-list a {
      font-size: 12px;
      color: var(--text-dim);
      background: rgba(255, 255, 255, 0.03);
      padding: 4px 10px;
      border-radius: 4px;
    }
    .friend-links-list a:hover {
      color: #fff;
      background: rgba(255, 45, 136, 0.2);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }

    /* 浮动客服 */
    .float-kefu-btn {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      background: linear-gradient(135deg, var(--pink-neon), var(--purple-neon));
      color: #fff;
      width: 54px;
      height: 54px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 4px 20px rgba(255, 45, 136, 0.5);
      transition: transform 0.3s ease;
    }
    .float-kefu-btn:hover {
      transform: scale(1.1);
    }
    .kefu-modal {
      display: none;
      position: fixed;
      right: 24px;
      bottom: 95px;
      z-index: 1000;
      background: var(--bg-surface);
      border: 1px solid var(--pink-neon);
      border-radius: 12px;
      padding: 20px;
      text-align: center;
      width: 240px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    }
    .kefu-modal.show {
      display: block;
    }
    .kefu-modal img {
      width: 160px;
      height: 160px;
      border-radius: 8px;
      margin: 10px 0;
      object-fit: cover;
    }

    /* 移动端汉堡菜单 */
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 34px; }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .workflow-steps { grid-template-columns: repeat(2, 1fr); }
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.open { display: flex; }
      .nav-links li { width: 100%; }
      .nav-links li a { width: 100%; padding: 12px 0; }
      .nav-toggle { display: block; }
      .hero-title { font-size: 26px; }
      .grid-3, .grid-2, .image-showcase { grid-template-columns: 1fr; }
      .hero-metrics { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .eval-score-header { flex-direction: column; align-items: flex-start; }
    }