/* 全局变量与明艳撞色风主题 */
    :root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --accent: #ff5722;
      --accent-hover: #f4511e;
      --highlight: #00d2ff;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-sub: #475569;
      --border-color: #cbd5e1;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08);
      --radius: 12px;
      --container-width: 1200px;
    }

    * {
      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(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    /* 贯穿全页的统一宽度容器 */
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid #e2e8f0;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

    .brand-logo img {
      max-height: 48px;
      width: auto;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 严格按照要求设置为0 */
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 10px 14px;
      color: var(--text-main);
      text-decoration: none;
      font-weight: 600;
      font-size: 15px;
      transition: color 0.2s, background-color 0.2s;
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: #eff6ff;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 700;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }

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

    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(255, 87, 34, 0.3);
    }

    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
    }

    .btn-outline {
      background-color: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
    }

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

    .menu-toggle {
      display: none;
      font-size: 24px;
      background: none;
      border: none;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero 区域 - 明艳撞色纯色与几何美感（无图片） */
    .hero-section {
      background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #06b6d4 100%);
      color: #ffffff;
      padding: 90px 0 80px;
      position: relative;
      overflow: hidden;
    }

    .hero-section::before {
      content: "";
      position: absolute;
      top: -100px;
      right: -100px;
      width: 400px;
      height: 400px;
      background: rgba(255, 87, 34, 0.25);
      border-radius: 50%;
      filter: blur(80px);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 18px;
      background: rgba(255, 255, 255, 0.2);
      border: 1px solid rgba(255, 255, 255, 0.4);
      border-radius: 30px;
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 24px;
      color: #fff;
    }

    .hero-title {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      color: #ffffff;
    }

    .hero-desc {
      font-size: 19px;
      line-height: 1.6;
      margin-bottom: 36px;
      color: #e0f2fe;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-cta-group .btn {
      padding: 14px 32px;
      font-size: 17px;
    }

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

    .stat-card {
      background: rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 22px 16px;
      border-radius: var(--radius);
      text-align: center;
      transition: transform 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
    }

    .stat-number {
      font-size: 32px;
      font-weight: 900;
      color: #ffed4a;
      line-height: 1;
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 14px;
      color: #f1f5f9;
      font-weight: 500;
    }

    /* 公用 Section 布局 */
    .section-block {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      background-color: #fff2e8;
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-sub);
      max-width: 720px;
      margin: 0 auto;
    }

    /* 通用卡片样式 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

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

    .feature-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-5px);
      border-color: var(--primary);
    }

    .feature-icon-box {
      width: 56px;
      height: 56px;
      border-radius: 10px;
      background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 900;
      margin-bottom: 20px;
    }

    .feature-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .feature-desc {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
    }

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

    .compare-badge-header {
      background: linear-gradient(90deg, #1e293b 0%, #334155 100%);
      color: #ffffff;
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .stars {
      color: #f59e0b;
      font-size: 24px;
    }

    .score-num {
      font-size: 36px;
      font-weight: 900;
      color: #38bdf8;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 15px;
    }

    .compare-table th {
      background-color: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .highlight-col {
      background-color: #eff6ff;
      font-weight: 700;
      color: var(--primary);
    }

    /* 案例展示与图片墙 */
    .media-card {
      background: #ffffff;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .media-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
    }

    .media-body {
      padding: 20px;
    }

    .media-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .media-text {
      font-size: 14px;
      color: var(--text-sub);
    }

    /* 评论卡片 */
    .review-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-circle {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 18px;
    }

    .user-info .name {
      font-weight: 700;
      font-size: 16px;
    }

    .user-info .role {
      font-size: 13px;
      color: var(--text-sub);
    }

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

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      transition: background-color 0.2s;
    }

    .faq-question:hover {
      background-color: #f8fafc;
    }

    .faq-answer {
      padding: 0 24px 18px;
      font-size: 15px;
      color: var(--text-sub);
      display: none;
      border-top: 1px solid #f1f5f9;
      margin-top: 10px;
      padding-top: 14px;
    }

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

    .faq-toggle-icon {
      font-weight: 900;
      font-size: 18px;
      color: var(--primary);
    }

    /* 表单与联系区 */
    .contact-wrapper {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 15px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      background-color: #f8fafc;
      transition: border-color 0.2s, background-color 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #ffffff;
    }

    textarea.form-control {
      min-height: 120px;
      resize: vertical;
    }

    .qr-box {
      text-align: center;
      background: #f8fafc;
      padding: 20px;
      border-radius: 8px;
      border: 1px dashed var(--border-color);
      margin-top: 20px;
    }

    .qr-box img {
      max-width: 160px;
      height: auto;
      border-radius: 6px;
    }

    /* 友情链接与文章链接 */
    .links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .links-box a {
      color: var(--primary);
      text-decoration: none;
      font-size: 14px;
      background: #eff6ff;
      padding: 6px 14px;
      border-radius: 20px;
      transition: background 0.2s;
    }

    .links-box a:hover {
      background: #dbeafe;
    }

    /* 底部统一 Footer */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand h3 {
      color: #ffffff;
      font-size: 20px;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.6;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 8px;
    }

    .footer-col ul li a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s;
    }

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 14px;
    }

    /* 悬浮客服面板 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--accent);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      cursor: pointer;
      text-decoration: none;
      font-size: 20px;
      transition: transform 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
      }
      .nav-links.show {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-desc {
        font-size: 16px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }