:root{
  --blue:#0a5bb0; --blue-dark:#0b3d78; --blue-deep:#082c58;
  --sky:#eaf3fb; --line:#e3e9f0; --text:#333; --muted:#777;
  --orange:#f39800;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--text);background:#fff;font-size:15px;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.wrap{width:1200px;max-width:92%;margin:0 auto}

/* ===== 顶部 ===== */
.topbar{background:var(--blue-deep);color:#cfe0f2;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:34px}
.topbar a:hover{color:#fff}
header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 2px 8px rgba(10,60,120,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{display:flex;align-items:center;gap:10px}
.logo .mark{width:46px;height:46px;background:var(--blue);color:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:20px;letter-spacing:1px}
.logo .name{font-size:22px;font-weight:700;color:var(--blue-dark);letter-spacing:2px}
.logo .slogan{font-size:11px;color:var(--muted);letter-spacing:1px;margin-top:2px}
nav.main{display:flex;gap:2px}
nav.main a{padding:0 18px;line-height:76px;font-size:16px;color:#333;position:relative}
nav.main a:hover,nav.main a.on{color:var(--blue)}
nav.main a.on::after{content:"";position:absolute;left:18px;right:18px;bottom:14px;height:3px;background:var(--blue);border-radius:2px}
.hdr-tel{display:flex;align-items:center;gap:8px;background:var(--blue);color:#fff;padding:10px 18px;border-radius:24px;font-size:15px;font-weight:700}
.hdr-tel:hover{background:var(--blue-dark)}
.hdr-tel svg{width:16px;height:16px;fill:#fff}

/* ===== Banner ===== */
.banner{position:relative;height:520px;overflow:hidden}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .8s;background-size:cover;background-position:center}
.slide.on{opacity:1}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,40,80,.75) 0%,rgba(6,40,80,.45) 45%,rgba(6,40,80,.1) 100%)}
.slide .cap{position:absolute;left:0;top:50%;transform:translateY(-50%);color:#fff;z-index:2}
.slide .cap h2{font-size:40px;letter-spacing:3px;margin-bottom:14px;text-shadow:0 2px 8px rgba(0,0,0,.3)}
.slide .cap p{font-size:17px;color:#dbe9f7;letter-spacing:1px}
.banner .dots{position:absolute;bottom:22px;left:0;right:0;display:flex;justify-content:center;gap:10px;z-index:3}
.banner .dots span{width:26px;height:4px;background:rgba(255,255,255,.4);border-radius:2px;cursor:pointer}
.banner .dots span.on{background:#fff}

/* ===== 五项特色 ===== */
.features{background:#fff;margin-top:-1px}
.feat-grid{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff;box-shadow:0 6px 18px rgba(10,60,120,.06)}
.feat{padding:26px 18px;text-align:center;border-right:1px solid var(--line);transition:.3s}
.feat:last-child{border-right:0}
.feat:hover{background:var(--sky)}
.feat .ico{width:64px;height:64px;margin:0 auto 14px;border-radius:50%;background:var(--sky);display:flex;align-items:center;justify-content:center}
.feat .ico svg{width:32px;height:32px;fill:var(--blue)}
.feat h3{font-size:17px;color:var(--blue-dark);margin-bottom:8px}
.feat p{font-size:13px;color:var(--muted);line-height:1.8}

/* ===== 通用版块标题 ===== */
section.block{padding:64px 0}
section.block.alt{background:var(--sky)}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head h2{font-size:30px;color:var(--blue-dark);letter-spacing:2px;display:inline-block;padding-bottom:12px;position:relative}
.sec-head h2::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:56px;height:3px;background:var(--blue);border-radius:2px}
.sec-head .en{font-size:14px;color:#a9bccf;letter-spacing:4px;text-transform:uppercase;margin-top:8px;font-style:italic}
.sec-head .more-link{float:right;font-size:14px;color:var(--blue)}
.sec-head .more-link:hover{color:var(--blue-dark)}

/* ===== 服务项目 ===== */
.tabs{display:flex;justify-content:center;gap:12px;margin-bottom:34px;flex-wrap:wrap}
.tabs a{padding:10px 26px;border:1px solid var(--line);border-radius:24px;font-size:15px;color:#555;background:#fff;transition:.25s}
.tabs a:hover,.tabs a.on{background:var(--blue);border-color:var(--blue);color:#fff}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.svc-card{border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff;transition:.3s;display:block}
.svc-card:hover{transform:translateY(-5px);box-shadow:0 12px 26px rgba(10,60,120,.14)}
.svc-card .ph{height:190px;overflow:hidden}
.svc-card .ph img{width:100%;height:100%;object-fit:cover;transition:.5s}
.svc-card:hover .ph img{transform:scale(1.06)}
.svc-card .tx{padding:16px 18px 20px}
.svc-card h3{font-size:16px;color:var(--blue-dark);line-height:1.5;height:48px;overflow:hidden;margin-bottom:10px}
.svc-card .go{font-size:13px;color:var(--muted)}
.svc-card:hover .go{color:var(--blue)}
.more-btn{display:block;width:180px;margin:36px auto 0;text-align:center;padding:12px 0;border:1px solid var(--blue);color:var(--blue);border-radius:26px;font-size:15px;letter-spacing:2px;transition:.25s}
.more-btn:hover{background:var(--blue);color:#fff}

/* ===== 企业优势 ===== */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.adv{background:#fff;border-radius:6px;padding:30px 26px;border-top:3px solid var(--blue);box-shadow:0 6px 18px rgba(10,60,120,.06);transition:.3s}
.adv:hover{transform:translateY(-5px);box-shadow:0 12px 26px rgba(10,60,120,.14)}
.adv .num{font-size:38px;font-weight:700;color:var(--sky);line-height:1;font-family:Georgia,serif}
.adv h3{font-size:18px;color:var(--blue-dark);margin:10px 0 12px}
.adv p{font-size:14px;color:var(--muted);line-height:1.9}

/* ===== 关于我们 ===== */
.about-flex{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
.about-ph{border-radius:6px;overflow:hidden;box-shadow:0 10px 30px rgba(10,60,120,.15)}
.about-ph img{width:100%;height:400px;object-fit:cover}
.about-tx h3{font-size:22px;color:var(--blue-dark);margin-bottom:6px}
.about-tx .en{font-size:13px;color:#a9bccf;letter-spacing:3px;margin-bottom:18px}
.about-tx p{font-size:15px;color:#555;text-align:justify;margin-bottom:14px}
.about-btns{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 28px;background:var(--blue);color:#fff;border-radius:4px;font-size:15px;transition:.25s}
.btn:hover{background:var(--blue-dark)}
.btn.ghost{background:transparent;color:var(--blue);border:1px solid var(--blue)}
.btn.ghost:hover{background:var(--blue);color:#fff}

/* ===== 实验环境 ===== */
.env-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.env{position:relative;border-radius:6px;overflow:hidden;height:210px}
.env img{width:100%;height:100%;object-fit:cover;transition:.5s}
.env:hover img{transform:scale(1.07)}
.env span{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 10px;background:linear-gradient(transparent,rgba(8,44,88,.75));color:#fff;font-size:14px}

/* ===== 服务流程 ===== */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{background:#fff;border-radius:6px;padding:34px 20px;text-align:center;border:1px solid var(--line);position:relative;transition:.3s}
.step:hover{border-color:var(--blue);box-shadow:0 10px 24px rgba(10,60,120,.12)}
.step::before{counter-increment:step;content:"0" counter(step);display:block;width:58px;height:58px;line-height:58px;margin:0 auto 16px;border-radius:50%;background:var(--blue);color:#fff;font-size:22px;font-weight:700;font-family:Georgia,serif}
.step h3{font-size:18px;color:var(--blue-dark);margin-bottom:8px}
.step p{font-size:13px;color:var(--muted)}

/* ===== 常见问题 ===== */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:6px;margin-bottom:14px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:700;color:var(--blue-dark);display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--blue);font-weight:400}
.faq-item[open] summary::after{content:"−"}
.faq-item[open]{border-color:var(--blue)}
.faq-item .ans{padding:0 22px 20px;font-size:14px;color:#555;text-align:justify}

/* ===== 新闻中心 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:.3s}
.news:hover{box-shadow:0 12px 26px rgba(10,60,120,.14);transform:translateY(-4px)}
.news .ph{height:170px;overflow:hidden}
.news .ph img{width:100%;height:100%;object-fit:cover}
.news .tx{padding:16px 18px 20px}
.news .date{font-size:12px;color:#a9bccf;margin-bottom:6px}
.news h3{font-size:15px;color:var(--blue-dark);line-height:1.55;height:46px;overflow:hidden;margin-bottom:8px}
.news p{font-size:13px;color:var(--muted);height:42px;overflow:hidden}
.news .empty,.nempty{grid-column:1/-1;text-align:center;color:var(--muted);padding:36px 0;border:1px dashed var(--line);border-radius:6px}

/* ===== CTA ===== */
.cta{background:linear-gradient(90deg,var(--blue-dark),var(--blue));color:#fff;padding:46px 0}
.cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.cta h3{font-size:22px;letter-spacing:1px}
.cta p{color:#d7e6f5;font-size:14px;margin-top:6px}
.cta .btn{background:#fff;color:var(--blue-dark);font-weight:700}
.cta .btn:hover{background:var(--sky)}

/* ===== 页脚 ===== */
footer{background:var(--blue-deep);color:#9db6cf;font-size:14px}
.f-cols{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.1fr;gap:36px;padding:52px 0 36px}
.f-cols h4{color:#fff;font-size:16px;margin-bottom:18px;letter-spacing:1px}
.f-cols li{margin-bottom:10px}
.f-cols a:hover{color:#fff}
.f-cols .logo .name{color:#fff}
.f-cols p{margin-top:14px;line-height:1.9}
.f-tel{font-size:20px;color:#fff;font-weight:700;letter-spacing:1px}
.f-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;text-align:center;font-size:13px;color:#7e97b3}
.f-bottom a:hover{color:#fff}

/* ===== 浮动按钮 ===== */
.fab{position:fixed;right:18px;bottom:26px;z-index:99;display:flex;flex-direction:column;gap:10px}
.fab a{width:56px;height:56px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(10,60,120,.3);transition:.25s}
.fab a:hover{background:var(--blue-dark)}
.fab svg{width:24px;height:24px;fill:#fff}

/* ===== 内页 banner ===== */
.page-banner{height:220px;background:linear-gradient(rgba(8,44,88,.72),rgba(8,44,88,.72)),url(../images/lab-area2.jpg) center/cover;color:#fff;display:flex;align-items:center}
.page-banner h1{font-size:30px;letter-spacing:2px}
.page-banner .crumb{font-size:13px;color:#c4d6ea;margin-top:8px}
.page-banner .crumb a:hover{color:#fff}

/* 内页通用 */
.article{max-width:900px;margin:0 auto}
.article h2.sub{font-size:20px;color:var(--blue-dark);margin:36px 0 16px;padding-left:12px;border-left:4px solid var(--blue)}
.article p{margin-bottom:12px;color:#555;text-align:justify}
.article table{width:100%;border-collapse:collapse;margin:14px 0;font-size:14px}
.article table td{border:1px solid var(--line);padding:10px 14px}
.article table td:first-child{background:var(--sky);color:var(--blue-dark);width:180px;font-weight:700}
.lic-card{display:grid;grid-template-columns:300px 1fr;gap:26px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:6px;padding:24px}
.lic-card img{border-radius:4px}
.svc-block{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:6px;padding:26px 30px;margin-bottom:24px}
.svc-block h3{font-size:19px;color:var(--blue-dark);margin-bottom:10px}
.svc-block p{color:#555;font-size:14px;margin-bottom:8px}
.note{background:#fff8ec;border:1px solid #f5dfb8;border-radius:6px;padding:14px 20px;font-size:13px;color:#8a6d3b;margin:16px 0}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .feat{border-bottom:1px solid var(--line)}
  .svc-grid,.adv-grid,.env-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .about-flex{grid-template-columns:1fr}
  .f-cols{grid-template-columns:1fr 1fr}
  nav.main{display:none}
  .banner{height:340px}
  .slide .cap h2{font-size:26px}
  .slide .cap p{font-size:14px}
  .hdr-tel span{display:none}
  .lic-card{grid-template-columns:1fr}
}
@media (max-width:560px){
  .svc-grid,.adv-grid,.env-grid,.news-grid,.flow{grid-template-columns:1fr}
  .f-cols{grid-template-columns:1fr}
  .feat-grid{grid-template-columns:1fr}
  section.block{padding:44px 0}
}


/* ===== 后台发布内容样式（新闻列表 / 文章页） ===== */
.news-list{max-width:900px;margin:0 auto}
.nitem{display:flex;gap:20px;background:#fff;border:1px solid var(--line);border-radius:6px;padding:20px 24px;margin-bottom:16px;transition:.3s}
.nitem:hover{border-color:var(--blue);box-shadow:0 8px 20px rgba(10,60,120,.1)}
.ndate{flex:0 0 92px;color:#a9bccf;font-size:14px;padding-top:4px;font-family:Georgia,serif}
.nbody{flex:1;min-width:0}
.ntitle{font-size:17px;line-height:1.5;margin-bottom:8px}
.ntitle a{color:var(--blue-dark)}
.ntitle a:hover{color:var(--blue)}
.nsum{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.nmore{text-align:center;margin-top:28px}
.nmore .go{display:inline-block;padding:10px 34px;border:1px solid var(--blue);color:var(--blue);border-radius:24px;font-size:14px;transition:.25s}
.nmore .go:hover{background:var(--blue);color:#fff}
.nempty{text-align:center;color:var(--muted);padding:44px 20px;border:1px dashed var(--line);border-radius:6px;font-size:14px}

/* 内容区面包屑（文章页 /articles/xx.html） */
main .crumb,article .crumb{font-size:13px;color:#8aa3bd;padding:18px 0 4px}
main .crumb a,article .crumb a{color:#8aa3bd}
main .crumb a:hover,article .crumb a:hover{color:var(--blue)}
main .crumb .sep,article .crumb .sep{margin:0 8px;color:#b9cbe0}

/* 文章页 */
.art-page{padding:20px 0 56px}
.art-h1{font-size:26px;color:var(--blue-dark);line-height:1.5;margin:16px 0 10px;letter-spacing:1px}
.art-meta{font-size:13px;color:#a9bccf;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:26px}
.artbody{font-size:15px;line-height:1.9;color:#444}
.artbody h2{font-size:19px;color:var(--blue-dark);margin:30px 0 14px;padding-left:12px;border-left:4px solid var(--blue)}
.artbody h3{font-size:17px;color:var(--blue-dark);margin:24px 0 12px}
.artbody p{margin-bottom:14px;text-align:justify}
.artbody ul,.artbody ol{margin:0 0 14px 22px}
.artbody li{margin-bottom:6px}
.artbody blockquote{border-left:4px solid var(--sky);background:var(--sky);padding:12px 18px;color:#55677e;margin:16px 0;border-radius:4px}
.artbody table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.artbody table td,.artbody table th{border:1px solid var(--line);padding:10px 14px}
.artbody table th{background:var(--sky);color:var(--blue-dark);text-align:left}
.artbody a{color:var(--blue)}
.artbody img{border-radius:6px;margin:10px 0}
.artbody figure{margin:22px 0}
.artbody figure.mdfig,.artbody figure.mdvideo{margin:22px 0}
.artbody figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:8px}
.artbody video{width:100%;border-radius:6px;background:#000}
.art-foot{margin-top:36px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.art-foot a{color:var(--blue)}