/* ========================================
   黑龙江凌霄环境监测有限公司 - 企业官网样式
   ======================================== */

/* ---- 全局变量 ---- */
:root {
  --primary: #1a5f2a;
  --primary-dark: #124a1f;
  --primary-light: #e8f5e9;
  --accent: #2e7d32;
  --text: #333333;
  --text-muted: #666666;
  --text-light: #999999;
  --bg: #ffffff;
  --bg-gray: #f5f5f5;
  --bg-dark: #2c3e50;
  --border: #e0e0e0;
  --border-light: #eeeeee;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
  --max-width: 1200px;
  --header-height: 90px;
  --transition: all 0.3s ease;
}

/* ---- 基础重置 ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; overflow-x: hidden; position: relative; }
html, body { height: auto; min-height: 0; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

/* ---- 容器 ---- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 15px; }
.section { padding: 60px 0; }
.section-title { text-align: center; margin-bottom: 40px; }
.section-title h2 { font-size: 28px; color: var(--primary); font-weight: 600; position: relative; display: inline-block; padding-bottom: 12px; }
.section-title h2::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 50px; height: 3px; background: var(--accent); }
.section-title p { color: var(--text-muted); margin-top: 10px; font-size: 14px; }

/* ---- 头部 ---- */
.header { background: var(--bg); box-shadow: var(--shadow); position: sticky; top: 0; z-index: 1000; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-height); }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { height: 60px; width: 60px; object-fit: contain; }
.logo-text h1 { font-size: 20px; color: var(--primary); font-weight: 700; line-height: 1.2; }
.logo-text span { font-size: 20px; color: var(--primary); font-weight: 700; line-height: 1.2; }
.logo-text p { font-size: 12px; color: var(--text-muted); }

/* ---- 主导航 ---- */
.main-nav { display: flex; align-items: center; }
.main-nav > ul { display: flex; gap: 0; }
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a { display: block; padding: 0 20px; height: var(--header-height); line-height: var(--header-height); font-size: 15px; color: var(--text); font-weight: 500; }
.main-nav > ul > li > a:hover, .main-nav > ul > li.active > a { color: var(--primary); background: var(--primary-light); }

/* 下拉菜单 */
.dropdown-menu { position: absolute; top: 100%; left: 0; background: var(--bg); min-width: 200px; box-shadow: var(--shadow-hover); opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition); border-top: 2px solid var(--primary); }
.main-nav > ul > li:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-menu li a { display: block; padding: 12px 20px; font-size: 14px; color: var(--text); border-bottom: 1px solid var(--border-light); }
.dropdown-menu li a:hover { background: var(--primary-light); color: var(--primary); padding-left: 25px; }
.dropdown-menu li:last-child a { border-bottom: none; }

/* 移动端菜单按钮 */
.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: 10px; }
.mobile-menu-btn span { display: block; width: 24px; height: 2px; background: var(--text); transition: var(--transition); }

/* ---- Banner ---- */
.banner { position: relative; width: 100%; overflow: hidden; }
.banner-slider { position: relative; width: 100%; height: 500px; }
.banner-slide { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0; transition: opacity 1s ease; }
.banner-slide.active { opacity: 1; }
.banner-slide img { width: 100%; height: 100%; object-fit: cover; }
.banner-dots { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 10; }
.banner-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.5); cursor: pointer; transition: var(--transition); }
.banner-dot.active { background: var(--primary); width: 30px; border-radius: 5px; }

/* 内页Banner */
.page-banner { width: 100%; height: 280px; position: relative; overflow: hidden; }
.page-banner img { width: 100%; height: 100%; object-fit: cover; }
.page-banner-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.4); display: flex; align-items: center; justify-content: center; }
.page-banner-title { color: #fff; font-size: 32px; font-weight: 600; text-shadow: 0 2px 4px rgba(0,0,0,0.3); }

/* ---- 面包屑 ---- */
.breadcrumb { background: var(--bg-gray); border-bottom: 1px solid var(--border-light); }
.breadcrumb-inner { max-width: var(--max-width); margin: 0 auto; padding: 12px 15px; display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 14px; color: var(--text-muted); }
.breadcrumb-inner a { color: var(--text-muted); }
.breadcrumb-inner a:hover { color: var(--primary); }
.breadcrumb-inner span { color: var(--text-light); }
.breadcrumb-inner .current { color: var(--primary); }

/* ---- 公告滚动 ---- */
.notice-bar { background: var(--primary-light); border-bottom: 1px solid var(--border-light); padding: 12px 0; overflow: hidden; }
.notice-wrapper { display: flex; align-items: center; max-width: var(--max-width); margin: 0 auto; padding: 0 15px; }
.notice-label { display: flex; align-items: center; gap: 6px; font-weight: 600; color: var(--primary); white-space: nowrap; margin-right: 20px; flex-shrink: 0; }
.notice-label svg { width: 18px; height: 18px; }
.notice-scroll { flex: 1; overflow: hidden; position: relative; height: 24px; }
.notice-list { display: flex; width: max-content; animation: scrollNoticeX 40s linear infinite; }
.notice-list:hover { animation-play-state: paused; }
.notice-item { display: flex; align-items: center; gap: 6px; width: 340px; flex-shrink: 0; height: 24px; line-height: 24px; font-size: 14px; color: var(--text); overflow: hidden; padding-right: 16px; }
.notice-item svg { width: 14px; height: 14px; color: var(--primary); flex-shrink: 0; }
.notice-item a { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block; }
.notice-item a:hover { color: var(--primary); }

@keyframes scrollNoticeX {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ---- 检测项目 ---- */
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.service-item { background: var(--bg); border: 1px solid var(--border-light); padding: 24px 20px; text-align: center; transition: var(--transition); cursor: pointer; }
.service-item:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.service-icon { width: 50px; height: 50px; margin: 0 auto 12px; display: flex; align-items: center; justify-content: center; background: var(--primary-light); border-radius: 50%; }
.service-icon svg { width: 24px; height: 24px; color: var(--primary); }
.service-item h3 { font-size: 15px; color: var(--text); font-weight: 500; }

/* ---- 新闻资讯 Tab ---- */
.about-section { background: var(--bg-gray); }
.news-tabs { display: flex; justify-content: center; gap: 0; margin-bottom: 30px; border-bottom: 2px solid var(--border); }
.news-tab { padding: 12px 30px; font-size: 16px; color: var(--text-muted); cursor: pointer; position: relative; transition: var(--transition); border: none; background: none; }
.news-tab:hover { color: var(--primary); }
.news-tab.active { color: var(--primary); font-weight: 600; }
.news-tab.active::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 100%; height: 2px; background: var(--primary); }
.news-panel { display: none; }
.news-panel.active { display: block; }
.news-list { display: flex; flex-direction: column; gap: 0; }
.news-item { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; border-bottom: 1px dashed var(--border); transition: var(--transition); }
.news-item:hover { padding-left: 8px; }
.news-item:last-child { border-bottom: none; }
.news-item-left { display: flex; align-items: center; gap: 10px; flex: 1; overflow: hidden; min-width: 0; }
.news-item-left svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }
.news-item-title { font-size: 15px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-item:hover .news-item-title { color: var(--primary); }
.news-item-date { font-size: 13px; color: var(--text-light); flex-shrink: 0; margin-left: 15px; }

/* ---- 关于我们 ---- */
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about-image { border-radius: 8px; overflow: hidden; box-shadow: var(--shadow); }
.about-image img { width: 100%; height: 100%; object-fit: cover; }
.about-text h3 { font-size: 24px; color: var(--primary); margin-bottom: 16px; font-weight: 600; }
.about-text p { font-size: 15px; color: var(--text-muted); margin-bottom: 12px; line-height: 1.8; text-align: justify; }
.about-features { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; margin-top: 24px; }
.about-feature { display: flex; align-items: flex-start; gap: 10px; }
.about-feature svg { width: 20px; height: 20px; color: var(--primary); flex-shrink: 0; margin-top: 2px; }
.about-feature span { font-size: 14px; color: var(--text); }

/* ---- 企业资质 ---- */
.qualify-section { background: var(--bg-gray); }
.qualify-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.qualify-item { background: var(--bg); border: 1px solid var(--border-light); padding: 20px; text-align: center; transition: var(--transition); }
.qualify-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.qualify-item img { width: 100%; height: 260px; object-fit: cover; border-radius: 4px; margin-bottom: 12px; }
.qualify-item h4 { font-size: 14px; color: var(--text); font-weight: 500; }

/* ---- 双栏布局 ---- */
.double-col { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.col-box { background: var(--bg); border: 1px solid var(--border-light); padding: 24px; }
.col-box-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); }
.col-box-header h3 { font-size: 18px; color: var(--primary); font-weight: 600; }
.col-box-header .more { font-size: 13px; color: var(--text-light); }
.col-box-header .more:hover { color: var(--primary); }
.col-list { display: flex; flex-direction: column; gap: 0; }
.col-item { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; border-bottom: 1px dashed var(--border-light); }
.col-item:last-child { border-bottom: none; }
.col-item-left { display: flex; align-items: center; gap: 8px; flex: 1; overflow: hidden; min-width: 0; }
.col-item-left svg { width: 14px; height: 14px; color: var(--primary); flex-shrink: 0; }
.col-item-title { font-size: 14px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.col-item:hover .col-item-title { color: var(--primary); }
.col-item-date { font-size: 12px; color: var(--text-light); flex-shrink: 0; margin-left: 10px; }

/* ---- 检测案例 ---- */
.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.case-item { background: var(--bg); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
.case-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.case-item-image { width: 100%; height: 180px; overflow: hidden; }
.case-item-image img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.case-item:hover .case-item-image img { transform: scale(1.05); }
.case-item-content { padding: 15px; }
.case-item-content h4 { font-size: 15px; color: var(--text); font-weight: 500; margin-bottom: 8px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.case-item-content p { font-size: 13px; color: var(--text-muted); line-height: 1.6; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }

/* ---- 友情链接 ---- */
.friend-links { background: var(--bg-gray); padding: 30px 0; }
.friend-links-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 15px; }
.friend-links-title { font-size: 16px; color: var(--primary); font-weight: 600; margin-bottom: 15px; }
.friend-links-list { display: flex; flex-wrap: wrap; gap: 12px 20px; }
.friend-links-list a { font-size: 14px; color: var(--text-muted); }
.friend-links-list a:hover { color: var(--primary); }

/* ---- Footer ---- */
.footer { background: var(--bg-dark); color: #fff; padding: 50px 0 0; overflow: hidden; }
.footer-grid { display: grid; grid-template-columns: 1fr 2fr 1.5fr; gap: 40px; margin-bottom: 40px; }
.footer-col h4 { font-size: 16px; font-weight: 600; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background: var(--primary); }
.footer-col p, .footer-col a { font-size: 14px; color: rgba(255,255,255,0.7); line-height: 1.8; }
.footer-col a:hover { color: #fff; }
.footer-contact-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; }
.footer-contact-item svg { width: 18px; height: 18px; color: var(--primary); flex-shrink: 0; margin-top: 3px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links.footer-links-double { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 30px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(255,255,255,0.5); }

/* ---- 返回顶部 ---- */
.back-to-top { position: fixed; right: 20px; bottom: 80px; width: 44px; height: 44px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; visibility: hidden; transition: var(--transition); z-index: 999; box-shadow: var(--shadow); filter: alpha(opacity=0); _display: none; }
.back-to-top.visible { opacity: 1; visibility: visible; filter: alpha(opacity=100); _display: flex; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-2px); }
.back-to-top svg { width: 20px; height: 20px; }

/* ---- 手机端底部导航 ---- */
.mobile-bottom-nav { display: none; position: fixed; bottom: 0; left: 0; width: 100%; background: #fff; border-top: 1px solid var(--border); z-index: 1000; padding: 6px 0; }
.mobile-bottom-nav-inner { display: flex; justify-content: space-around; align-items: center; }
.mobile-nav-item { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 4px 12px; color: var(--text-muted); font-size: 11px; }
.mobile-nav-item svg { width: 22px; height: 22px; }
.mobile-nav-item.active { color: var(--primary); }

/* ---- 内页布局 ---- */
.page-layout { display: grid; grid-template-columns: 260px 1fr; gap: 30px; padding: 40px 0; }

/* 左侧导航 */
.sidebar { background: var(--bg); border: 1px solid var(--border-light); height: fit-content; position: sticky; top: 100px; min-width: 0; overflow: hidden; }
.sidebar-title { background: var(--primary); color: #fff; padding: 16px 20px; font-size: 18px; font-weight: 600; }
.sidebar-kefu { height: 98px; overflow: hidden; }
.sidebar-kefu img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-nav { padding: 10px 0; }
.sidebar-nav li a { display: flex; align-items: center; gap: 8px; padding: 12px 20px; font-size: 14px; color: var(--text); border-bottom: 1px solid var(--border-light); transition: var(--transition); min-width: 0; overflow: hidden; }
.sidebar-nav li a svg { width: 14px; height: 14px; color: var(--primary); flex-shrink: 0; }
.sidebar-nav li a:hover, .sidebar-nav li a.active { background: var(--primary-light); color: var(--primary); padding-left: 25px; }
.sidebar-contact { border-top: 1px solid var(--border-light); }
.sidebar-contact-title { background: var(--primary); color: #fff; padding: 16px 20px; font-size: 18px; font-weight: 600; }
.sidebar-contact-body { padding: 10px 0; }
.sidebar-contact-row { display: flex; align-items: center; gap: 10px; padding: 12px 20px; font-size: 14px; color: var(--text); border-bottom: 1px solid var(--border-light); min-width: 0; overflow: hidden; }
.sidebar-contact-row svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }
.sidebar-contact-row span { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.sidebar-contact-row:last-child { border-bottom: none; }

/* 右侧内容 */
.main-content { background: var(--bg); border: 1px solid var(--border-light); padding: 30px; min-height: 500px; min-width: 0; overflow: hidden; }
.content-header { margin-bottom: 24px; padding-bottom: 16px; border-bottom: 2px solid var(--primary); }
.content-header h2 { font-size: 22px; color: var(--primary); font-weight: 600; }

/* ---- 文章列表 ---- */
.article-list { display: flex; flex-direction: column; gap: 0; }
.article-item { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; border-bottom: 1px dashed var(--border); transition: var(--transition); }
.article-item:hover { padding-left: 8px; }
.article-item:last-child { border-bottom: none; }
.article-item-left { display: flex; align-items: center; gap: 10px; flex: 1; overflow: hidden; min-width: 0; }
.article-item-left svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }
.article-item-title { font-size: 15px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-item:hover .article-item-title { color: var(--primary); }
.article-item-date { font-size: 13px; color: var(--text-light); flex-shrink: 0; margin-left: 15px; }

/* ---- 产品/案例列表 ---- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-item { background: var(--bg); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
.product-item:hover { box-shadow: var(--shadow-hover); }
.product-item-image { width: 100%; height: 200px; overflow: hidden; }
.product-item-image img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.product-item:hover .product-item-image img { transform: scale(1.05); }
.product-item-content { padding: 15px; }
.product-item-content h4 { font-size: 15px; color: var(--text); font-weight: 500; margin-bottom: 8px; }
.product-item-content p { font-size: 13px; color: var(--text-muted); line-height: 1.6; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }

/* ---- 分页 ---- */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--border-light); }
.pagination-info { font-size: 14px; color: var(--text-muted); margin-right: 15px; }
.pagination a, .pagination span { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; padding: 0 12px; border: 1px solid var(--border); font-size: 14px; color: var(--text); transition: var(--transition); }
.pagination a:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .prev, .pagination .next { padding: 0 16px; }

/* ---- 详情页 ---- */
.article-detail h1 { font-size: 24px; color: var(--primary); margin-bottom: 16px; font-weight: 600; }
.article-meta { display: flex; gap: 20px; font-size: 13px; color: var(--text-light); margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--border-light); }
.article-body { font-size: 15px; line-height: 1.8; color: var(--text); }
.article-body p { margin-bottom: 16px; }
.article-body img { max-width: 100%; margin: 20px 0; border-radius: 4px; }

/* 上下篇 */
.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--border-light); }
.article-nav-prev, .article-nav-next { display: flex; align-items: center; gap: 8px; font-size: 14px; min-width: 0; overflow: hidden; }
.article-nav-prev svg, .article-nav-next svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }
.article-nav-prev a, .article-nav-next a { color: var(--primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-nav-prev a:hover, .article-nav-next a:hover { text-decoration: underline; }
.article-nav-prev span, .article-nav-next span { color: var(--text-light); flex-shrink: 0; }
.article-nav-next { justify-content: flex-end; text-align: right; }

/* 相关推荐 */
.related-section { margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--border-light); }
.related-section h3 { font-size: 18px; color: var(--primary); margin-bottom: 20px; font-weight: 600; word-break: break-all; }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.related-item { background: var(--bg-gray); padding: 16px; border-radius: 4px; transition: var(--transition); min-width: 0; overflow: hidden; }
.related-item:hover { background: var(--primary-light); }
.related-item-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; min-width: 0; }
.related-item-title { font-size: 14px; color: var(--text); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.related-item-title:hover { color: var(--primary); }
.related-item-date { font-size: 12px; color: var(--text-light); flex-shrink: 0; margin-left: 10px; }
.related-item-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }

/* ---- 单页内容 ---- */
.page-content h3 { font-size: 20px; color: var(--primary); margin: 24px 0 12px; font-weight: 600; }
.page-content p { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 12px; }
.page-content ul { margin: 12px 0; padding-left: 20px; }
.page-content ul li { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 8px; list-style: disc; }
.page-content .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 24px 0; }
.page-content .feature-card { background: var(--bg-gray); padding: 24px; text-align: center; border-radius: 4px; }
.page-content .feature-card svg { width: 40px; height: 40px; color: var(--primary); margin-bottom: 12px; }
.page-content .feature-card h4 { font-size: 16px; color: var(--text); margin-bottom: 8px; }
.page-content .feature-card p { font-size: 13px; color: var(--text-muted); margin: 0; }

/* ---- 网站地图 ---- */
.sitemap-section { margin-bottom: 30px; }
.sitemap-section h3 { font-size: 18px; color: var(--primary); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--primary); font-weight: 600; }
.sitemap-links { display: flex; flex-wrap: wrap; gap: 10px 20px; }
.sitemap-links a { font-size: 14px; color: var(--text-muted); padding: 6px 0; }
.sitemap-links a:hover { color: var(--primary); }
.sitemap-sub { margin-left: 20px; margin-top: 10px; }

/* ========================================
   响应式适配
   ======================================== */
@media (max-width: 1024px) {
  .service-grid { grid-template-columns: repeat(3, 1fr); }
  .case-grid { grid-template-columns: repeat(3, 1fr); }
  .qualify-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .page-layout { grid-template-columns: 220px 1fr; }
  .notice-item { width: 300px; }
}

@media (max-width: 768px) {
  :root { --header-height: 70px; }
  .header-inner { padding: 0 10px; }
  .logo img { height: 55px; width: 55px; }
  .logo-text h1 { font-size: 16px; }
  .logo-text p { display: none; }
  .main-nav { display: none; position: absolute; top: var(--header-height); left: 0; width: 100%; background: var(--bg); box-shadow: var(--shadow); }
  .main-nav.active { display: block; }
  .main-nav > ul { flex-direction: column; }
  .main-nav > ul > li > a { height: 48px; line-height: 48px; padding: 0 15px; border-bottom: 1px solid var(--border-light); }
  .dropdown-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border-top: none; display: none; }
  .main-nav > ul > li.open .dropdown-menu { display: block; }
  .dropdown-menu li a { display: flex; align-items: center; gap: 8px; padding-left: 30px; }
  .dropdown-menu li a::before { content: ''; display: inline-block; width: 5px; height: 5px; background: var(--primary); border-radius: 50%; flex-shrink: 0; }
  .mobile-menu-btn { display: flex; }
  
  .banner-slider { height: 250px; }
  .page-banner { height: 180px; }
  .page-banner-title { font-size: 22px; }
  
  .section { padding: 40px 0; }
  .section-title h2 { font-size: 22px; }
  
  .service-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .service-item { padding: 16px 10px; }
  
  .about-content { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr 1fr; }
  .notice-wrapper { flex-direction: column; align-items: flex-start; gap: 8px; }
  .notice-scroll { width: 100%; }
  .notice-item { width: calc(100vw - 60px); padding-right: 20px; }
  
  .qualify-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .qualify-item { padding: 12px; }
  .qualify-item img { height: 120px; }
  
  .double-col { grid-template-columns: 1fr; }
  
  .case-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .case-item-image { height: 140px; }
  
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-col:first-child { display: none; }
  
  .page-layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  
  .article-nav { grid-template-columns: 1fr; }
  .article-nav-next { justify-content: flex-start; text-align: left; }
  
  .related-grid { grid-template-columns: 1fr; }
  
  .friend-links { display: none; }
  
  .mobile-bottom-nav { display: block; }
  .back-to-top { bottom: 70px; }
  body { padding-bottom: 60px; }
  
  .page-content .feature-grid { grid-template-columns: 1fr; }
  
  .news-tab { padding: 10px 16px; font-size: 14px; }
}

@media (max-width: 480px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: 1fr; }
  .pagination { flex-wrap: wrap; }
}
.area-banner { background: linear-gradient(135deg, #1a5f2a 0%, #2d8a4e 100%); height: 380px; display: flex; align-items: center; justify-content: center; color: #fff; text-align: center; position: relative; overflow: hidden; }
.area-banner::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: url('../images/banner1.jpg') center/cover; opacity: 0.25; }
.area-banner-content { position: relative; z-index: 1; padding: 0 20px; }
.area-banner-content h1 { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
.area-banner-content p { font-size: 18px; opacity: 0.9; }

.area-about { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.area-about-image img { width: 100%; height: 320px; object-fit: cover; border-radius: 8px; }
.area-about-text h3 { font-size: 22px; margin-bottom: 16px; color: var(--text); }
.area-about-text p { font-size: 15px; line-height: 1.8; color: var(--text-light); margin-bottom: 12px; }

.area-news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.area-news-item { background: var(--bg); border: 1px solid var(--border-light); border-radius: 8px; padding: 20px; transition: var(--transition); }
.area-news-item-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.area-news-item-header a { color: var(--text); font-size: 15px; font-weight: 500; }
.area-news-item-header a:hover { color: var(--primary); }
.area-news-item-header span { color: var(--text-light); font-size: 13px; flex-shrink: 0; margin-left: 12px; }
.area-news-item p { font-size: 14px; color: var(--text-light); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.area-case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.area-case-item { background: var(--bg); border: 1px solid var(--border-light); border-radius: 8px; overflow: hidden; transition: var(--transition); }
.area-case-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.area-case-item img { width: 100%; height: 180px; object-fit: cover; }
.area-case-item-content { padding: 16px; }
.area-case-item-content h4 { font-size: 15px; margin-bottom: 8px; color: var(--text); }
.area-case-item-content p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

.area-faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.area-faq-item { background: var(--bg); border: 1px solid var(--border-light); padding: 20px; border-radius: 8px; }
.area-faq-item h4 { font-size: 15px; color: var(--primary); margin-bottom: 10px; }
.area-faq-item p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

.area-process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; text-align: center; }
.area-process-step { background: var(--bg); border: 1px solid var(--border-light); padding: 24px 16px; border-radius: 8px; position: relative; }
.area-process-step::after { content: '→'; position: absolute; right: -18px; top: 50%; transform: translateY(-50%); color: var(--primary); font-size: 20px; font-weight: bold; }
.area-process-step:last-child::after { display: none; }
.area-process-step .step-num { width: 40px; height: 40px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 700; margin: 0 auto 12px; }
.area-process-step h4 { font-size: 15px; margin-bottom: 6px; }
.area-process-step p { font-size: 13px; color: var(--text-light); }

.area-contact { display: grid; grid-template-columns: 1fr 1.5fr; gap: 40px; }
.area-contact-info { display: flex; flex-direction: column; gap: 16px; }
.area-contact-row { display: flex; align-items: flex-start; gap: 12px; }
.area-contact-row svg { width: 20px; height: 20px; color: var(--primary); flex-shrink: 0; margin-top: 2px; }
.area-contact-row p { font-size: 15px; color: var(--text); line-height: 1.6; }

.area-sub-links { background: var(--bg-gray); padding: 40px 0; }
.area-sub-links-inner { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.area-sub-links-title { font-size: 18px; font-weight: 600; margin-bottom: 20px; color: var(--text); }
.area-sub-links-list { display: flex; flex-wrap: wrap; gap: 10px 24px; }
.area-sub-links-list a { font-size: 14px; color: var(--text-light); }
.area-sub-links-list a:hover { color: var(--primary); }

@media (max-width: 768px) {
  .area-banner { height: 260px; }
  .area-banner-content h1 { font-size: 24px; }
  .area-banner-content p { font-size: 14px; }
  .area-about { grid-template-columns: 1fr; }
  .area-about-image { display: none; }
  .area-news-grid { grid-template-columns: 1fr; }
  .area-case-grid { grid-template-columns: repeat(2, 1fr); }
  .area-faq-grid { grid-template-columns: 1fr; }
  .area-process { grid-template-columns: repeat(2, 1fr); }
  .area-process-step::after { display: none; }
  .area-contact { grid-template-columns: 1fr; }
  .area-sub-links { display: none; }
}