:root {
      --primary: #c91924;
      --primary-hover: #a8101a;
      --primary-light: #fff2f2;
      --primary-gradient: linear-gradient(135deg, #d92531 0%, #b3121d 100%);
      --accent: #f59e0b;
      --text-dark: #1e2530;
      --text-body: #4b5565;
      --text-muted: #6b7280;
      --bg-page: #fbfbfc;
      --bg-card: #ffffff;
      --border-color: #f1d5d7;
      --border-light: #f3f4f6;
      --shadow-sm: 0 2px 8px rgba(180, 20, 30, 0.04);
      --shadow-md: 0 8px 24px rgba(180, 20, 30, 0.08);
      --shadow-lg: 0 16px 36px rgba(180, 20, 30, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-page);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-dark);
      line-height: 1.6;
      background-color: var(--bg-page);
      overflow-x: hidden;
    }

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

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

    /* 顶部导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

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

    .brand-wrap img {
      max-height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }

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

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

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: var(--primary-gradient);
      color: #ffffff !important;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      box-shadow: 0 4px 14px rgba(201, 25, 36, 0.3);
      transition: all 0.25s ease;
      border: 1px solid transparent;
      cursor: pointer;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(201, 25, 36, 0.4);
      background: linear-gradient(135deg, #b91c1c 0%, #880b13 100%);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      border: 1px solid var(--primary);
      background: #ffffff;
      color: var(--primary) !important;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--primary);
      margin: 5px 0;
      transition: all 0.3s;
    }

    /* 首屏 Hero - 禁止出现任何图片 */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, #ffebeb 0%, #ffffff 60%, #fff5f5 100%);
      padding: 75px 0 65px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      border-radius: 30px;
      color: var(--primary);
      font-size: 0.88rem;
      font-weight: 700;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 34px;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 44px;
      flex-wrap: wrap;
    }

    .hero-btn-main {
      font-size: 1.05rem;
      padding: 13px 32px;
    }

    .hero-tags-cloud {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px;
      padding-top: 20px;
      border-top: 1px dashed #eed0d2;
    }

    .tech-pill {
      font-size: 0.82rem;
      background: #ffffff;
      border: 1px solid #fed7d7;
      padding: 4px 12px;
      border-radius: 20px;
      color: #7f1d1d;
      font-weight: 500;
    }

    /* 核心指标条目 */
    .metrics-bar {
      padding: 30px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-light);
    }

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

    .metric-item {
      padding: 15px;
      border-right: 1px solid var(--border-light);
    }

    .metric-item:last-child {
      border-right: none;
    }

    .metric-value {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用章节规范 */
    .section-wrap {
      padding: 65px 0;
      border-bottom: 1px solid var(--border-light);
    }

    .section-wrap.alt-bg {
      background-color: #fdfefe;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 45px;
    }

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

    .section-title {
      font-size: 1.95rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 卡片网格 */
    .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;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--border-color);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 18px;
    }

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

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 流程组件 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 12px;
    }

    .step-item {
      background: #ffffff;
      padding: 22px 14px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 32px;
      height: 32px;
      line-height: 32px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 12px;
      font-size: 0.9rem;
    }

    .step-name {
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .step-info {
      font-size: 0.8rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* 对比表格 */
    .compare-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .compare-banner {
      background: var(--primary-gradient);
      color: #ffffff;
      padding: 20px 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    .rating-badge {
      background: rgba(255, 255, 255, 0.2);
      padding: 6px 14px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 1rem;
    }

    .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 #f1f3f6;
      font-size: 0.92rem;
    }

    .compare-table th {
      background-color: #fafbfc;
      color: var(--text-dark);
      font-weight: 700;
    }

    .col-highlight {
      background-color: #fff9f9;
      color: var(--primary);
      font-weight: 700;
    }

    /* 案例展示 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .gallery-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }

    .img-box {
      width: 100%;
      overflow: hidden;
      aspect-ratio: 16/9;
      background: #f3f4f6;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .gallery-item:hover .img-box img {
      transform: scale(1.04);
    }

    .gallery-info {
      padding: 16px;
    }

    .gallery-title {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .gallery-meta {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 客户评价卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

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

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }

    .user-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-dark);
    }

    .user-role {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    .review-text {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
      flex-grow: 1;
    }

    .stars {
      color: #f59e0b;
      margin-top: 10px;
      font-size: 0.9rem;
    }

    /* FAQ 手风琴面板 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: all 0.25s ease;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

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

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

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.65;
      border-top: 1px solid #fdf2f2;
    }

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

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

    /* 需求匹配与表单 */
    .form-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .contact-info-panel {
      background: linear-gradient(180deg, #fff5f5 0%, #ffffff 100%);
      padding: 40px;
      border-right: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-list {
      list-style: none;
      margin: 24px 0;
    }

    .contact-list li {
      margin-bottom: 16px;
      font-size: 0.92rem;
      color: var(--text-body);
    }

    .contact-list strong {
      color: var(--text-dark);
      display: inline-block;
      width: 100px;
    }

    .qr-box {
      text-align: center;
      padding: 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      max-width: 180px;
    }

    .qr-box img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .form-panel {
      padding: 40px;
    }

    .custom-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

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

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid #d1d5db;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-dark);
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary);
    }

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

    /* 文章资讯与友链 */
    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-link-tag {
      background: #ffffff;
      border: 1px solid var(--border-light);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      color: var(--text-body);
      transition: all 0.2s;
    }

    .article-link-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .friend-links-box {
      margin-top: 30px;
      padding-top: 20px;
      border-top: 1px solid var(--border-light);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .friend-links-box a {
      color: var(--text-body);
    }

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

    /* 页脚 */
    .site-footer {
      background: #181d24;
      color: #9ca3af;
      padding: 55px 0 35px;
      border-top: 3px solid var(--primary);
      font-size: 0.9rem;
    }

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

    .footer-title {
      font-size: 1rem;
      color: #ffffff;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

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

    .footer-links a {
      color: #9ca3af;
    }

    .footer-links a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #2b323c;
      padding-top: 25px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* 悬浮工具 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      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(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.1rem;
      font-weight: bold;
      cursor: pointer;
      transition: all 0.25s;
    }

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

    /* 响应式断点 */
    @media (max-width: 992px) {
      .cards-grid-3,
      .cards-grid-4,
      .gallery-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(3, 1fr);
      }
      .form-layout {
        grid-template-columns: 1fr;
      }
      .contact-info-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
      }
      .footer-inner {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.85rem;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border-light);
      }
      .cards-grid-3,
      .cards-grid-4,
      .gallery-grid,
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 2px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .custom-form {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .footer-inner {
        grid-template-columns: 1fr;
      }
    }