:root {
      --c-bg: #f4faf6;
      --c-surface: #ffffff;
      --c-surface-soft: #edf7f1;
      --c-primary: #10b981;
      --c-primary-hover: #059669;
      --c-primary-light: #e6f7ef;
      --c-text-main: #132a21;
      --c-text-muted: #4a6358;
      --c-border: #d4ecdf;
      --c-shadow: 0 10px 30px -5px rgba(16, 185, 129, 0.08);
      --c-shadow-hover: 0 16px 36px -4px rgba(16, 185, 129, 0.16);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

    body {
      font-family: var(--font-stack);
      background-color: var(--c-bg);
      color: var(--c-text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(16, 185, 129, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 90% 90%, rgba(52, 211, 153, 0.08) 0%, transparent 50%);
      background-attachment: fixed;
      -webkit-font-smoothing: antialiased;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      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, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
      transition: all 0.3s ease;
    }

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

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

    .brand-logo img {
      max-height: 42px;
      width: auto;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--c-text-main);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 0.925rem;
      font-weight: 500;
      color: var(--c-text-muted);
      padding: 8px 12px;
      border-radius: 6px;
      display: inline-block;
      transition: all 0.2s ease;
    }

    .nav-links li a:hover {
      color: var(--c-primary-hover);
      background-color: var(--c-primary-light);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.925rem;
      font-weight: 600;
      border-radius: 8px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      text-align: center;
    }

    .btn-primary {
      background-color: var(--c-primary);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
    }

    .btn-primary:hover {
      background-color: var(--c-primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(16, 185, 129, 0.4);
    }

    .btn-outline {
      background-color: #ffffff;
      border-color: var(--c-border);
      color: var(--c-text-main);
    }

    .btn-outline:hover {
      border-color: var(--c-primary);
      color: var(--c-primary);
      background-color: var(--c-primary-light);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--c-text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 首屏 Hero - 无图片严格要求 */
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
    }

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

    .hero-content h1 {
      font-size: 2.35rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--c-text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.075rem;
      color: var(--c-text-muted);
      line-height: 1.7;
      margin-bottom: 32px;
    }

    .hero-action-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-highlight-btn {
      padding: 12px 28px;
      font-size: 1.05rem;
      background: #059669;
      color: #ffffff;
      border-radius: 8px;
      font-weight: 700;
      box-shadow: 0 6px 20px rgba(5, 150, 105, 0.35);
      border: 1px solid #047857;
    }

    .hero-highlight-btn:hover {
      background: #047857;
      color: #ffffff;
      transform: translateY(-2px);
    }

    .hero-stat-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px solid var(--c-border);
      padding-top: 24px;
    }

    .hero-stat-item .stat-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--c-primary);
    }

    .hero-stat-item .stat-txt {
      font-size: 0.85rem;
      color: var(--c-text-muted);
    }

    .hero-visual-card {
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 16px;
      padding: 28px;
      box-shadow: var(--c-shadow);
      position: relative;
    }

    .visual-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
      padding-bottom: 12px;
      border-bottom: 1px dashed var(--c-border);
    }

    .tag-bubble {
      display: inline-flex;
      align-items: center;
      padding: 4px 10px;
      background: var(--c-primary-light);
      color: #065f46;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    .engine-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .engine-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 14px;
      background: var(--c-surface-soft);
      border-radius: 8px;
      border-left: 4px solid var(--c-primary);
    }

    .engine-name {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--c-text-main);
    }

    .engine-badge {
      font-size: 0.8rem;
      color: var(--c-text-muted);
      background: #ffffff;
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid var(--c-border);
    }

    /* 通用区块与标题 */
    .section-wrap {
      padding: 70px 0;
    }

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }

    .section-head .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      color: var(--c-primary);
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-head h2 {
      font-size: 2rem;
      font-weight: 700;
      color: var(--c-text-main);
      margin-bottom: 12px;
    }

    .section-head p {
      font-size: 1rem;
      color: var(--c-text-muted);
    }

    /* 模块卡片阵列 */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .card {
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--c-shadow);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--c-shadow-hover);
      border-color: rgba(16, 185, 129, 0.4);
    }

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--c-primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--c-primary);
      font-weight: 700;
      margin-bottom: 16px;
    }

    .card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      color: var(--c-text-main);
      font-weight: 700;
    }

    .card p {
      font-size: 0.9rem;
      color: var(--c-text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
      flex-grow: 1;
    }

    .card-footer-note {
      font-size: 0.8rem;
      color: var(--c-primary-hover);
      font-weight: 600;
    }

    /* 支持平台网格标签 */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--c-border);
      padding: 8px 14px;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--c-text-main);
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
    }

    /* 流程图步进器 */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-box {
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      padding: 24px;
      border-radius: 12px;
      position: relative;
    }

    .step-index {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--c-primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 12px;
    }

    .step-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.875rem;
      color: var(--c-text-muted);
    }

    /* 对比评测精美模块 */
    .review-score-panel {
      background: linear-gradient(135deg, #ffffff 0%, var(--c-surface-soft) 100%);
      border: 1px solid var(--c-border);
      border-radius: 16px;
      padding: 36px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--c-shadow);
    }

    .score-left h3 {
      font-size: 1.5rem;
      color: var(--c-text-main);
      margin-bottom: 6px;
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #d97706;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .score-stars {
      color: #f59e0b;
    }

    .score-right {
      text-align: right;
    }

    .score-big {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1;
      color: var(--c-primary);
    }

    .score-max {
      font-size: 1.1rem;
      color: var(--c-text-muted);
      font-weight: 500;
    }

    .compare-table-wrapper {
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 14px;
      overflow-x: auto;
      box-shadow: var(--c-shadow);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--c-border);
      font-size: 0.925rem;
    }

    .compare-table th {
      background: var(--c-surface-soft);
      font-weight: 700;
      color: var(--c-text-main);
    }

    .compare-table td.col-brand {
      font-weight: 700;
      color: #065f46;
      background: rgba(16, 185, 129, 0.03);
    }

    /* 案例中心展示图文 */
    .case-card {
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--c-shadow);
      display: flex;
      flex-direction: column;
    }

    .case-media {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e5ede8;
      overflow: hidden;
      position: relative;
    }

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

    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

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

    .case-body {
      padding: 20px;
      flex-grow: 1;
    }

    .case-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-desc {
      font-size: 0.875rem;
      color: var(--c-text-muted);
    }

    /* 宣传图画廊展示区 */
    .promo-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    .promo-gallery img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-radius: 10px;
      border: 1px solid var(--c-border);
      box-shadow: var(--c-shadow);
    }

    /* 需求匹配与表单 */
    .form-panel {
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--c-shadow);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group.full {
      grid-column: span 2;
    }

    .form-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--c-text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--c-border);
      border-radius: 8px;
      font-size: 0.925rem;
      background: #fafdfc;
      color: var(--c-text-main);
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--c-primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

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

    /* 用户评论 */
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
      border-top: 1px solid var(--c-border);
      padding-top: 14px;
    }

    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--c-primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--c-primary);
    }

    .review-meta h4 {
      font-size: 0.95rem;
      font-weight: 700;
    }

    .review-meta span {
      font-size: 0.8rem;
      color: var(--c-text-muted);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 10px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-item.active {
      border-color: var(--c-primary);
    }

    .faq-question {
      padding: 18px 20px;
      font-size: 1rem;
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
      color: var(--c-text-main);
    }

    .faq-arrow {
      font-size: 1rem;
      transition: transform 0.25s ease;
      color: var(--c-primary);
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px 20px;
      font-size: 0.925rem;
      color: var(--c-text-muted);
      line-height: 1.65;
    }

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

    /* 文章与资讯列表 */
    .article-box {
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--c-shadow);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .article-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 14px;
      background: var(--c-surface-soft);
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--c-text-main);
      border: 1px solid transparent;
      transition: all 0.2s ease;
    }

    .article-link-item:hover {
      border-color: var(--c-primary);
      background: #ffffff;
      color: var(--c-primary-hover);
      transform: translateX(4px);
    }

    /* 代理加盟政策条 */
    .partner-banner {
      background: linear-gradient(135deg, #059669 0%, #10b981 100%);
      color: #ffffff;
      border-radius: 16px;
      padding: 40px;
      display: grid;
      grid-template-columns: 1.4fr 0.6fr;
      gap: 30px;
      align-items: center;
      box-shadow: 0 12px 30px rgba(16, 185, 129, 0.25);
    }

    .partner-banner h3 {
      font-size: 1.8rem;
      margin-bottom: 12px;
      font-weight: 800;
    }

    .partner-banner p {
      font-size: 1rem;
      opacity: 0.95;
      line-height: 1.6;
    }

    .partner-action {
      display: flex;
      justify-content: flex-end;
    }

    .partner-action .btn {
      background: #ffffff;
      color: #065f46;
      font-size: 1rem;
      padding: 14px 28px;
    }

    .partner-action .btn:hover {
      background: #f0fdf4;
      transform: translateY(-2px);
    }

    /* 联系我们与二维码卡片 */
    .contact-card-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 30px;
      background: var(--c-surface);
      border: 1px solid var(--c-border);
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--c-shadow);
    }

    .contact-details {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
    }

    .contact-row strong {
      min-width: 90px;
      color: var(--c-text-muted);
    }

    .qr-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      background: var(--c-surface-soft);
      padding: 24px;
      border-radius: 12px;
      border: 1px solid var(--c-border);
    }

    .qr-container img {
      width: 140px;
      height: 140px;
      border-radius: 8px;
      border: 1px solid var(--c-border);
      margin-bottom: 10px;
      background: #ffffff;
    }

    .qr-container p {
      font-size: 0.85rem;
      color: var(--c-text-muted);
      font-weight: 500;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--c-border);
      padding: 48px 0 24px;
      margin-top: 60px;
    }

    .footer-top {
      padding-bottom: 30px;
      border-bottom: 1px solid var(--c-border);
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--c-text-main);
      margin-bottom: 12px;
    }

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

    .friend-links-list a {
      font-size: 0.85rem;
      color: var(--c-text-muted);
      background: var(--c-surface-soft);
      padding: 5px 12px;
      border-radius: 6px;
      border: 1px solid var(--c-border);
    }

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

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.85rem;
      color: var(--c-text-muted);
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 悬浮客服面板 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--c-border);
      box-shadow: 0 4px 16px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--c-primary);
      cursor: pointer;
      font-size: 1.2rem;
      transition: all 0.25s ease;
    }

    .float-btn:hover {
      background: var(--c-primary);
      color: #ffffff;
      transform: scale(1.06);
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .workflow-timeline { grid-template-columns: repeat(2, 1fr); }
      .hero-grid { grid-template-columns: 1fr; }
      .partner-banner { grid-template-columns: 1fr; }
      .partner-action { justify-content: flex-start; }
      .contact-card-grid { grid-template-columns: 1fr; }
      .promo-gallery { grid-template-columns: 1fr; }
      .promo-gallery img { height: auto; }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--c-border);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.active { display: flex; }
      .nav-links li { width: 100%; }
      .nav-links li a { width: 100%; padding: 10px 0; }
      .nav-actions { display: none; }
      .hero-section { padding: 40px 0; }
      .hero-content h1 { font-size: 1.85rem; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .workflow-timeline { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .form-group.full { grid-column: span 1; }
      .review-score-panel { flex-direction: column; text-align: center; gap: 16px; }
      .score-right { text-align: center; }
    }