:root {
      --bg-main: #0b0f19;
      --bg-card: rgba(18, 26, 43, 0.75);
      --bg-card-hover: rgba(26, 38, 64, 0.85);
      --primary-cyan: #00f2fe;
      --primary-purple: #7928ca;
      --primary-pink: #ff0080;
      --primary-green: #00ff87;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-highlight: #ffffff;
      --border-color: rgba(0, 242, 254, 0.2);
      --border-hover: rgba(0, 242, 254, 0.6);
      --neon-glow: 0 0 20px rgba(0, 242, 254, 0.35);
      --neon-pink-glow: 0 0 20px rgba(255, 0, 128, 0.35);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      background-color: var(--bg-main);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(121, 40, 202, 0.18) 0%, transparent 40%),
        radial-gradient(circle at 85% 25%, rgba(0, 242, 254, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 50% 70%, rgba(255, 0, 128, 0.12) 0%, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.6;
      overflow-x: hidden;
      min-height: 100vh;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      background: rgba(11, 15, 25, 0.85);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

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

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

    .brand-wrap img {
      height: 38px;
      width: auto;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #ffffff;
      letter-spacing: 0.5px;
      background: linear-gradient(90deg, var(--primary-cyan), #ffffff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 8px 14px;
      transition: color 0.2s ease, text-shadow 0.2s ease;
      display: inline-block;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-cyan);
      text-shadow: 0 0 10px rgba(0, 242, 254, 0.5);
    }

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

    .btn-nav-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      border-radius: 9999px;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
      color: #ffffff;
      font-weight: 600;
      font-size: 0.9rem;
      text-decoration: none;
      box-shadow: var(--neon-glow);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.6);
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 1rem;
    }

    /* 统一通栏与标题规范 */
    section {
      padding: 80px 0;
      position: relative;
    }

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

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      border-radius: 20px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid var(--border-color);
      color: var(--primary-cyan);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 100px 0 80px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 30px;
      background: rgba(255, 0, 128, 0.1);
      border: 1px solid rgba(255, 0, 128, 0.3);
      color: #ff7ebb;
      font-size: 0.85rem;
      margin-bottom: 24px;
      box-shadow: var(--neon-pink-glow);
    }

    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #ffffff;
    }

    .hero-title span {
      background: linear-gradient(135deg, #00f2fe 0%, #4facfe 30%, #ff0080 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 0 30px rgba(0, 242, 254, 0.2);
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
    }

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

    .btn-hero-main {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 50px;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
      color: #ffffff;
      text-decoration: none;
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.5);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: none;
    }

    .btn-hero-main:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 0 45px rgba(0, 242, 254, 0.8);
    }

    .btn-hero-sub {
      padding: 14px 30px;
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: 50px;
      background: rgba(18, 26, 43, 0.8);
      color: #ffffff;
      text-decoration: none;
      border: 1px solid var(--border-color);
      transition: all 0.25s ease;
    }

    .btn-hero-sub:hover {
      border-color: var(--primary-cyan);
      background: rgba(26, 38, 64, 0.9);
      box-shadow: var(--neon-glow);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
      text-align: center;
      transition: transform 0.3s ease, border-color 0.3s ease;
      backdrop-filter: blur(10px);
    }

    .metric-card:hover {
      transform: translateY(-5px);
      border-color: var(--primary-cyan);
      box-shadow: var(--neon-glow);
    }

    .metric-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-cyan);
      margin-bottom: 6px;
    }

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

    /* 平台核心模型支持标签墙 */
    .model-ticker-wrap {
      padding: 20px 0;
      background: rgba(11, 15, 25, 0.5);
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      overflow: hidden;
      margin-top: 40px;
    }

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

    .model-tag {
      padding: 6px 14px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.85rem;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      color: var(--primary-cyan);
      border-color: var(--primary-cyan);
      background: rgba(0, 242, 254, 0.05);
    }

    /* 服务能力卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      border-color: var(--primary-cyan);
      box-shadow: 0 10px 30px rgba(0, 242, 254, 0.15);
      background: var(--bg-card-hover);
    }

    .feature-icon {
      font-size: 2rem;
      margin-bottom: 16px;
      display: inline-block;
    }

    .feature-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .feature-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 场景与工作流专区 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 20px;
    }

    .scenario-item {
      background: rgba(18, 26, 43, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 20px;
      transition: all 0.25s ease;
    }

    .scenario-item:hover {
      border-color: var(--primary-pink);
      transform: translateY(-4px);
      box-shadow: var(--neon-pink-glow);
    }

    .scenario-item-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scenario-item-title::before {
      content: "";
      display: inline-block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary-pink);
    }

    .scenario-item-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 素材展示卡片 */
    .media-card-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: center;
      margin-top: 30px;
    }

    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      overflow: hidden;
      padding: 16px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    }

    .media-card img {
      width: 100%;
      height: auto;
      border-radius: 10px;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover img {
      transform: scale(1.02);
    }

    /* 对比评测表格 */
    .compare-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 32px;
      box-shadow: var(--neon-glow);
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      background: linear-gradient(90deg, rgba(0, 242, 254, 0.1), rgba(121, 40, 202, 0.15));
      border-radius: 12px;
      padding: 20px 28px;
      margin-bottom: 28px;
      border: 1px solid rgba(0, 242, 254, 0.3);
    }

    .score-meta {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-number {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary-cyan);
      text-shadow: 0 0 20px rgba(0, 242, 254, 0.6);
      line-height: 1;
    }

    .score-stars {
      color: #ffb703;
      font-size: 1.4rem;
      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(255, 255, 255, 0.08);
      font-size: 0.95rem;
    }

    .compare-table th {
      color: #ffffff;
      font-weight: 700;
      background: rgba(255, 255, 255, 0.02);
    }

    .compare-table .highlight-col {
      background: rgba(0, 242, 254, 0.05);
      color: var(--primary-cyan);
      font-weight: 600;
    }

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

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

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 8px;
    }

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

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.3s ease;
    }

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

    .review-text {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }

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

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-purple), var(--primary-pink));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .user-info-name {
      font-size: 0.95rem;
      font-weight: 600;
      color: #ffffff;
    }

    .user-info-role {
      font-size: 0.8rem;
      color: var(--primary-cyan);
    }

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

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

    .faq-question {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 1.05rem;
      color: #ffffff;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary-cyan);
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }

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

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }

    /* 文章与资讯链接 */
    .articles-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-link-item {
      padding: 8px 16px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 8px;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
      transition: all 0.2s ease;
    }

    .article-link-item:hover {
      background: rgba(0, 242, 254, 0.1);
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
    }

    /* 需求表单与联系 */
    .contact-form-layout {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 36px;
      align-items: start;
    }

    .form-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      background: rgba(11, 15, 25, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #ffffff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary-cyan);
      box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
    }

    .form-control option {
      background: #0b0f19;
      color: #ffffff;
    }

    .contact-card-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .contact-info-item {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .contact-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-cyan);
      font-size: 1.2rem;
    }

    .contact-qr-wrap {
      text-align: center;
      padding: 20px;
      background: rgba(255, 255, 255, 0.02);
      border: 1px dashed var(--border-color);
      border-radius: 12px;
    }

    .contact-qr-wrap img {
      width: 140px;
      height: 140px;
      border-radius: 8px;
      display: block;
      margin: 0 auto 12px;
    }

    /* 友情链接与页脚 */
    .friend-links-wrap {
      padding: 24px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      margin-top: 40px;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s ease;
    }

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

    footer.site-footer {
      background: #060911;
      padding: 40px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--text-muted);
      font-size: 0.9rem;
    }

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

    /* 悬浮客服挂件与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: rgba(18, 26, 43, 0.9);
      border: 1px solid var(--border-color);
      color: var(--primary-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: var(--neon-glow);
      transition: all 0.25s ease;
      text-decoration: none;
    }

    .float-btn:hover {
      background: var(--primary-cyan);
      color: #0b0f19;
      transform: scale(1.1);
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-title {
        font-size: 2.4rem;
      }
      .grid-3, .timeline-steps, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-form-layout {
        grid-template-columns: 1fr;
      }
      .media-card-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #0b0f19;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        padding: 10px 0;
        width: 100%;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .grid-3, .grid-2, .grid-4, .timeline-steps, .reviews-grid {
        grid-template-columns: 1fr;
      }
      .score-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
      }
      .footer-content {
        flex-direction: column;
        text-align: center;
      }
    }