:root {
      --c-bg: #f8fafc;
      --c-surface: #ffffff;
      --c-text-main: #0f172a;
      --c-text-muted: #475569;
      --c-accent-blue: #0284c7;
      --c-accent-orange: #ea580c;
      --c-accent-purple: #7c3aed;
      --c-accent-green: #059669;
      --c-accent-pink: #db2777;
      --c-border: #e2e8f0;
      --c-border-strong: #0f172a;
      --shadow-neo: 4px 4px 0px #0f172a;
      --shadow-neo-hover: 6px 6px 0px #0f172a;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--c-bg);
      color: var(--c-text-main);
    }

    body {
      background: radial-gradient(circle at 10% 10%, rgba(2, 132, 199, 0.04) 0%, transparent 40%),
                  radial-gradient(circle at 90% 90%, rgba(234, 88, 12, 0.04) 0%, transparent 40%),
                  var(--c-bg);
      color: var(--c-text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      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(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--c-border-strong);
    }

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

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--c-text-main);
    }

    .logo-box {
      max-height: 42px;
      display: flex;
      align-items: center;
    }

    .logo-box img {
      max-height: 38px;
      width: auto;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--c-text-main);
    }

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

    .nav-item {
      margin: 0 4px;
    }

    .nav-link {
      display: inline-block;
      padding: 6px 12px;
      text-decoration: none;
      color: var(--c-text-main);
      font-weight: 600;
      font-size: 0.92rem;
      border-radius: var(--radius-sm);
      transition: background-color 0.2s, color 0.2s;
    }

    .nav-link:hover {
      background-color: #fee2e2;
      color: var(--c-accent-orange);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn-action-hero {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--c-accent-orange);
      color: #ffffff !important;
      font-weight: 700;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--c-border-strong);
      box-shadow: 2px 2px 0px var(--c-border-strong);
      text-decoration: none;
      transition: all 0.15s ease-in-out;
      font-size: 0.95rem;
    }

    .btn-action-hero:hover {
      transform: translate(-1px, -1px);
      box-shadow: 4px 4px 0px var(--c-border-strong);
      background-color: #c2410c;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-tag {
      display: inline-block;
      padding: 6px 16px;
      background: #fef08a;
      border: 2px solid var(--c-border-strong);
      box-shadow: 3px 3px 0px var(--c-border-strong);
      font-weight: 800;
      font-size: 0.85rem;
      margin-bottom: 20px;
      border-radius: var(--radius-sm);
      color: #854d0e;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 20px;
      color: var(--c-text-main);
    }

    .hero-title .highlight {
      background: linear-gradient(180deg, transparent 65%, #bae6fd 65%);
      display: inline;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--c-text-muted);
      margin-bottom: 30px;
      max-width: 600px;
    }

    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 32px;
    }

    .btn-main-link {
      background: #38bdf8;
      color: var(--c-text-main);
      font-weight: 800;
      font-size: 1.1rem;
      padding: 14px 28px;
      border: 2px solid var(--c-border-strong);
      box-shadow: var(--shadow-neo);
      text-decoration: none;
      border-radius: var(--radius-md);
      transition: all 0.15s ease-in-out;
    }

    .btn-main-link:hover {
      background: #0284c7;
      color: #ffffff;
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-neo-hover);
    }

    .btn-outline-link {
      background: var(--c-surface);
      color: var(--c-text-main);
      font-weight: 700;
      font-size: 1.05rem;
      padding: 14px 24px;
      border: 2px solid var(--c-border-strong);
      box-shadow: var(--shadow-neo);
      text-decoration: none;
      border-radius: var(--radius-md);
      transition: all 0.15s ease-in-out;
    }

    .btn-outline-link:hover {
      background: #f1f5f9;
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-neo-hover);
    }

    /* 首屏纯CSS指标面板 */
    .hero-card-panel {
      background: #ffffff;
      border: 3px solid var(--c-border-strong);
      box-shadow: 8px 8px 0px var(--c-border-strong);
      border-radius: var(--radius-lg);
      padding: 30px;
      position: relative;
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 2px solid var(--c-border);
      padding-bottom: 16px;
      margin-bottom: 20px;
    }

    .panel-status-dot {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 0.85rem;
    }

    .dot {
      width: 10px;
      height: 10px;
      background: #22c55e;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
    }

    .panel-stats-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .stat-box {
      background: #f8fafc;
      border: 2px solid var(--c-border);
      border-radius: var(--radius-sm);
      padding: 16px;
      transition: border-color 0.2s;
    }

    .stat-box:hover {
      border-color: var(--c-border-strong);
    }

    .stat-val {
      font-size: 1.7rem;
      font-weight: 900;
      color: var(--c-accent-purple);
      line-height: 1.1;
      margin-bottom: 4px;
    }

    .stat-lbl {
      font-size: 0.85rem;
      color: var(--c-text-muted);
      font-weight: 600;
    }

    /* 通用Section布局 */
    .section-block {
      padding: 70px 0;
      border-top: 2px solid var(--c-border);
    }

    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 4px 12px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--c-border-strong);
      margin-bottom: 12px;
    }

    .tag-blue { background: #e0f2fe; color: #0369a1; }
    .tag-orange { background: #ffedd5; color: #c2410c; }
    .tag-purple { background: #f3e8ff; color: #6b21a8; }
    .tag-green { background: #dcfce7; color: #15803d; }

    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      color: var(--c-text-main);
      margin-bottom: 12px;
    }

    .section-sub {
      font-size: 1.05rem;
      color: var(--c-text-muted);
    }

    /* 模块：平台介绍 */
    .platform-features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .neo-card {
      background: var(--c-surface);
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-neo);
      padding: 24px;
      transition: all 0.2s ease-in-out;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .neo-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-neo-hover);
    }

    .card-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 2px 8px;
      border: 1px solid var(--c-border-strong);
      border-radius: var(--radius-sm);
      align-self: flex-start;
      margin-bottom: 12px;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 10px;
    }

    .card-content {
      font-size: 0.95rem;
      color: var(--c-text-muted);
      flex-grow: 1;
    }

    /* 模型矩阵标签云 */
    .model-tags-wrapper {
      background: #f1f5f9;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-neo);
    }

    .tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-chip {
      background: #ffffff;
      color: var(--c-text-main);
      padding: 8px 14px;
      border: 2px solid var(--c-border-strong);
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 700;
      box-shadow: 2px 2px 0px var(--c-border-strong);
      transition: background-color 0.2s, transform 0.15s;
    }

    .model-chip:hover {
      background: #fef08a;
      transform: translateY(-2px);
    }

    /* 案例图文区域 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
      align-items: stretch;
    }

    .media-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-neo);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
      border-bottom: 2px solid var(--c-border-strong);
    }

    .media-img-wrap.square-ratio {
      aspect-ratio: 1 / 1;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

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

    .media-info {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    /* 对比评测表格 */
    .comparison-wrapper {
      background: #ffffff;
      border: 3px solid var(--c-border-strong);
      box-shadow: var(--shadow-neo);
      border-radius: var(--radius-lg);
      padding: 28px;
    }

    .score-badge-banner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      background: #fdf4ff;
      border: 2px solid var(--c-accent-purple);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      margin-bottom: 24px;
    }

    .score-stars {
      font-size: 1.1rem;
      font-weight: 800;
      color: #a21caf;
    }

    .score-stars span {
      color: #eab308;
    }

    .score-points {
      font-size: 1.25rem;
      font-weight: 900;
      color: var(--c-accent-purple);
    }

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

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .comparison-table th, 
    .comparison-table td {
      padding: 14px 18px;
      border: 1px solid var(--c-border);
    }

    .comparison-table th {
      background: #f8fafc;
      font-weight: 800;
      color: var(--c-text-main);
      border-bottom: 2px solid var(--c-border-strong);
    }

    .comparison-table tr:hover {
      background-color: #f8fafc;
    }

    .col-highlight {
      background: #f0fdf4;
      font-weight: 700;
      color: #15803d;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .step-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: 3px 3px 0px var(--c-border-strong);
      position: relative;
    }

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: #facc15;
      color: var(--c-text-main);
      font-weight: 900;
      border: 2px solid var(--c-border-strong);
      border-radius: 50%;
      margin-bottom: 12px;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-neo);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--c-text-main);
      margin-bottom: 16px;
      font-style: normal;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--c-border);
      padding-top: 12px;
    }

    .avatar-placeholder {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #cbd5e1;
      border: 2px solid var(--c-border-strong);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.9rem;
      color: #334155;
    }

    .author-info h4 {
      font-size: 0.95rem;
      font-weight: 800;
    }

    .author-info p {
      font-size: 0.8rem;
      color: var(--c-text-muted);
    }

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

    .faq-item {
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-md);
      background: #ffffff;
      box-shadow: 2px 2px 0px var(--c-border-strong);
      overflow: hidden;
    }

    .faq-btn {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 20px;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--c-text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-icon {
      font-size: 1.25rem;
      transition: transform 0.2s;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 20px;
      font-size: 0.95rem;
      color: var(--c-text-muted);
      border-top: 1px dashed var(--c-border);
      margin-top: 6px;
      padding-top: 14px;
    }

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

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

    /* 表单与联络布局 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 36px;
      align-items: start;
    }

    .contact-info-panel {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-neo);
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 20px;
    }

    .contact-list li {
      font-size: 0.95rem;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .qrcode-box {
      margin-top: 24px;
      padding: 16px;
      background: #f8fafc;
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      text-align: center;
    }

    .qrcode-box img {
      max-width: 140px;
      height: auto;
      border: 1px solid var(--c-border-strong);
      display: block;
      margin: 0 auto 8px;
    }

    .form-wrapper {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-neo);
    }

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

    .form-label {
      display: block;
      font-weight: 700;
      font-size: 0.92rem;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      background: #fafafa;
    }

    .form-control:focus {
      outline: none;
      background: #ffffff;
      border-color: var(--c-accent-blue);
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
    }

    .btn-submit {
      width: 100%;
      background: var(--c-accent-green);
      color: #ffffff;
      font-weight: 800;
      font-size: 1.05rem;
      padding: 14px;
      border: 2px solid var(--c-border-strong);
      box-shadow: var(--shadow-neo);
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.15s ease-in-out;
    }

    .btn-submit:hover {
      background: #047857;
      transform: translate(-1px, -1px);
      box-shadow: var(--shadow-neo-hover);
    }

    /* 文章列表 */
    .article-box {
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-neo);
      margin-bottom: 30px;
    }

    .article-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .article-chip-link {
      background: #f1f5f9;
      color: var(--c-text-main);
      padding: 6px 14px;
      font-size: 0.88rem;
      font-weight: 600;
      border: 1px solid var(--c-border-strong);
      border-radius: var(--radius-sm);
      text-decoration: none;
      transition: background 0.2s;
    }

    .article-chip-link:hover {
      background: #e2e8f0;
      color: var(--c-accent-blue);
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 3px solid var(--c-border-strong);
      padding: 50px 0 30px;
      color: var(--c-text-main);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-heading {
      font-size: 1.05rem;
      font-weight: 800;
      margin-bottom: 16px;
      border-left: 4px solid var(--c-accent-orange);
      padding-left: 8px;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .friend-links a {
      color: var(--c-text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      background: #f8fafc;
      padding: 4px 10px;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-sm);
      transition: all 0.2s;
    }

    .friend-links a:hover {
      color: var(--c-accent-blue);
      border-color: var(--c-accent-blue);
    }

    .footer-bottom {
      border-top: 1px solid var(--c-border);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--c-text-muted);
    }

    .footer-bottom a {
      color: var(--c-text-muted);
      text-decoration: none;
    }

    .footer-bottom a:hover {
      color: var(--c-text-main);
    }

    /* 悬浮工具 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      border: 2px solid var(--c-border-strong);
      box-shadow: 2px 2px 0px var(--c-border-strong);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--c-text-main);
      text-decoration: none;
      font-weight: 800;
      font-size: 0.85rem;
      cursor: pointer;
      transition: transform 0.15s ease-in-out;
    }

    .float-btn:hover {
      transform: translateY(-2px);
      background: #fef08a;
    }

    /* 移动端兼容 */
    @media (max-width: 900px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
      }
      .contact-layout {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
      .hero-title {
        font-size: 2.1rem;
      }
    }