:root{--brand:#0abbb9;--brand-d:#0891b2;--ink:#1e293b;--sub:#64748b;--line:#e2e8f0;--bg:#f8fafc}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);line-height:1.7;background:#fff}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
/* 头部 */
header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:20px;height:68px}
/* 页头 Logo：用 scripts/gen-logo.mjs 生成的紧裁版本（图片边界==可见内容边界），
   所以这里的高度就是可见高度。
   display:block 不能省：行内图片会坐在文字基线上，行盒在下方留出 descender 空间，
   导致包裹它的 <a> 比图片高 ~7px，align-items:center 居中后 logo 会被顶高约 3.6px。 */
.nav img.logo{height:42px;width:auto;display:block}
.nav>a:first-child{flex-shrink:0}
/* 一级菜单 8 项 + 语言切换要在一行内放下，容器可用宽度只有 1152px（.wrap 最宽 1200）。
   布局：logo 左 → 菜单紧随 logo（26px）→ 语言切换被 margin-right:auto 顶到最右，
   这样菜单不会悬在中间、logo 后面也不会出现一大块空白。 */
.nav ul{display:flex;gap:4px;list-style:none;margin-left:0;margin-right:auto;flex-wrap:wrap;justify-content:flex-start;row-gap:0}
.nav li{position:relative}
.nav li>a{display:block;padding:8px 8px;font-size:15px;font-weight:500;color:#0f172a;border-radius:8px;white-space:nowrap;letter-spacing:.2px}
.nav li>a:hover{color:var(--brand-d);background:#ecfeff}
.nav{gap:0}
.nav>a:first-child{margin-right:26px}
/* 窄屏再收紧一档（≤1200 直接切汉堡菜单，见下方 media query） */
@media(max-width:1200px){
  .nav li>a{padding:8px 7px;font-size:14.5px}
  .nav .lang{margin-left:2px}
  .nav .lang a{padding:4px 6px}
}
/* 英文菜单标签更长（Molecular & Cell / OmicsHub Cloud 等），项内边距再收 4px，
   并已在 site.json 里把「代谢流同位素示踪」的英文菜单名缩短为 Metabolic Flux（页面标题仍是全称）。 */
html[lang="en"] .nav li>a{padding:8px 7px;font-size:13.5px;letter-spacing:0}
/* 中文菜单项较多，收紧间距保证与 logo 同轴单行（对齐审计要求） */
html[lang="zh-CN"] .nav ul{gap:2px}
html[lang="zh-CN"] .nav li>a{padding:8px 6px;font-size:14px;letter-spacing:0}

.nav .drop{display:none;position:absolute;top:100%;left:0;min-width:220px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px rgba(15,23,42,.10);padding:8px}
.nav li:hover .drop{display:block}
.nav .drop a{display:block;padding:8px 12px;font-size:14px;color:var(--sub);border-radius:8px}
.nav .drop a:hover{color:var(--brand-d);background:#ecfeff}
.lang{margin-left:8px;font-size:13px;color:var(--sub);display:flex;align-items:center;gap:2px}
.lang a{padding:4px 8px;border-radius:6px;display:inline-flex;align-items:center;gap:5px}
.lang i{font-style:normal;opacity:.4}
.lang a.on{color:var(--brand-d);background:#ecfeff;font-weight:600}
/* Hero */
.hero{background:linear-gradient(135deg,#06b6d4 0%,#0891b2 45%,#0e7490 100%);color:#fff;position:relative;overflow:hidden}
.hero .deco{position:absolute;border-radius:50%;background:rgba(255,255,255,.08);pointer-events:none}
.hero-inner{position:relative;z-index:2;text-align:center;padding:110px 24px 90px;max-width:960px;margin:0 auto}
.hero .tag{display:inline-block;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);border-radius:30px;padding:6px 18px;font-size:13px;font-weight:600;letter-spacing:2px;margin-bottom:22px}
.hero h1{font-size:50px;font-weight:800;letter-spacing:4px;margin-bottom:16px;text-shadow:0 4px 20px rgba(0,0,0,.15)}
.hero .sub{font-size:19px;color:rgba(255,255,255,.88);letter-spacing:2px;margin-bottom:12px}
.hero .desc{font-size:17px;color:rgba(255,255,255,.85);max-width:680px;margin:0 auto 36px}
.hero .cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:56px}
.btn{display:inline-block;padding:13px 32px;border-radius:30px;font-size:16px;font-weight:700;transition:.25s}
.btn-w{background:#fff;color:var(--brand-d);box-shadow:0 8px 24px rgba(0,0,0,.15)}
.btn-w:hover{transform:translateY(-2px)}
.btn-o{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.45)}
.btn-o:hover{background:rgba(255,255,255,.22)}
.hero .svc{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.hero .svc div{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:14px 18px;min-width:118px}
.hero .svc b{display:block;font-size:16px;margin-bottom:3px}
.hero .svc span{font-size:12px;color:#cffafe;letter-spacing:1px}
/* 区块 */
section{padding:84px 0}
.sec-head{text-align:center;margin-bottom:52px}
.sec-head h2{font-size:34px;font-weight:800}
.sec-head p{color:var(--sub);letter-spacing:2px;margin-top:6px;font-size:15px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px 24px;text-align:center;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(8,145,178,.12);border-color:#a5f3fc}
.card img{height:104px;margin-bottom:18px}
.card.svc img.cicon{height:88px;margin-bottom:14px}
.card h3{font-size:18px;margin-bottom:6px}
.card p{font-size:14px;color:var(--sub)}
/* 优势 */
.adv{background:var(--bg)}
.adv .list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.adv .item{background:#fff;border-radius:14px;padding:26px 24px;text-align:center;border:1px solid var(--line)}
.adv .item img.ic{width:88px;height:88px;border-radius:20px;margin:0 auto 14px;display:block}
.adv .item h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px}
.adv .item p{font-size:13px;color:var(--sub);line-height:1.7}
/* 关于 */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.about-grid img{border-radius:18px;box-shadow:0 20px 48px rgba(15,23,42,.12)}
/* 双栏时：默认（首页）让图片填满文字列高度；
   「关于我们」页用 .about-fit 变体 —— 图片按原比例 1000×525 完整显示、不裁切，
   左栏文案已精简到与图片等高，两栏上下两端精确对齐（实测差值 0.1px）。 */
@media(min-width:961px){
  .about-grid{align-items:stretch}
  .about-grid img{width:100%;height:100%;object-fit:cover;display:block}
  .about-grid.about-fit{align-items:start}
  .about-grid.about-fit img{height:auto}
  .about-grid.about-fit h2{line-height:1.4}
  .about-grid.about-fit p.txt{margin-bottom:12px}
  .about-grid.about-fit p.txt:last-child{margin-bottom:0}
  /* 英文版公司名折成两行（比中文多 42px）：把标题行距压紧，使总高仍与图片齐平 */
  .about-grid.about-fit.is-en h2{line-height:1.13}
}
.about-grid h2{font-size:30px;font-weight:800;margin-bottom:6px}
.about-grid .en{color:var(--sub);letter-spacing:2px;font-size:14px;margin-bottom:22px}
.about-grid p.txt{color:#475569;font-size:15px;margin-bottom:14px;text-align:justify}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:26px}
.stats div{background:#ecfeff;border:1px solid #a5f3fc;border-radius:12px;padding:14px 10px;text-align:center}
.stats b{display:block;font-size:24px;color:var(--brand-d)}
.stats span{font-size:12px;color:var(--sub)}
/* 联系带：三色渐变 + 两枚半透明圆形装饰（原技术资源各页末尾的 CTA 块已并入这里，统一一套背景） */
.contact-band{background:linear-gradient(135deg,#06b6d4,#0891b2,#0e7490);color:#fff;text-align:center;padding:64px 24px 56px;position:relative;overflow:hidden}
.contact-band::before,.contact-band::after{content:"";position:absolute;border-radius:50%;background:#fff;opacity:.08;pointer-events:none}
.contact-band::before{top:-40px;right:-20px;width:200px;height:200px}
.contact-band::after{bottom:-50px;left:10%;width:180px;height:180px}
.contact-band>*{position:relative;z-index:1}
.contact-band h2{font-size:28px;margin-bottom:10px}
.contact-band p{color:rgba(255,255,255,.85);margin-bottom:30px}
.contact-band .phone{font-size:34px;font-weight:800;letter-spacing:1px}
.contact-band .cb-rows{display:flex;justify-content:center;gap:72px;flex-wrap:wrap;margin-bottom:34px}
.contact-band .cb-row{display:flex;align-items:center;gap:14px;text-align:left}
.contact-band .cb-ic{width:46px;height:46px;border-radius:50%;border:1.5px solid rgba(255,255,255,.45);display:flex;align-items:center;justify-content:center;flex:none}
.contact-band .cb-ic svg{width:21px;height:21px;fill:none;stroke:#fff;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.contact-band .cb-lb{font-size:12px;color:rgba(255,255,255,.65);letter-spacing:1.5px;margin-bottom:4px}
.contact-band .cb-vl{font-size:22px;font-weight:800;letter-spacing:.5px}
.contact-band .cb-vl a{color:#fff;text-decoration:none}
.contact-band .cb-ch{border-top:1px solid rgba(255,255,255,.18);padding-top:30px}
.contact-band .cb-ch-t{font-size:16px;font-weight:700;letter-spacing:1px;margin-bottom:4px}
.contact-band .cb-ch-e{font-size:11px;color:rgba(255,255,255,.55);letter-spacing:2.5px;margin-bottom:20px}
.contact-band .cb-qrs{display:flex;justify-content:center;gap:26px;flex-wrap:wrap}
.contact-band .cb-qr{background:#fff;border-radius:14px;padding:14px 14px 12px;width:168px}
.contact-band .cb-qr img{width:140px;height:140px;display:block;border-radius:6px}
.contact-band .cb-qr .t{color:#0f172a;font-size:14px;font-weight:700;margin-top:10px}
.contact-band .cb-qr .e{color:#94a3b8;font-size:10.5px;letter-spacing:1.2px;margin-top:2px;text-transform:uppercase}
/* 页脚 */
footer{background:#0f172a;color:#94a3b8;padding:64px 0 0;font-size:14px}
footer .cols{display:grid;grid-template-columns:1fr 1fr 1fr 1.6fr;gap:44px;padding-bottom:44px}
footer h4{color:#e2e8f0;font-size:14px;margin-bottom:16px;letter-spacing:.5px;position:relative;padding-bottom:10px}
footer h4::after{content:"";position:absolute;left:0;bottom:0;width:24px;height:2px;background:#0abbb9;border-radius:2px}
footer a{color:#94a3b8;transition:color .2s}
footer a:hover{color:#5eead4}
footer li{list-style:none;margin-bottom:9px}
/* 页脚联系栏（参考原站：圆形描边图标 + 标签/数值两行 + 官方渠道二维码卡） */
footer .fc-row{display:flex;align-items:center;gap:14px;margin-bottom:18px}
footer .fc-ic{width:44px;height:44px;flex:none;border-radius:50%;border:1px solid rgba(94,234,212,.35);display:flex;align-items:center;justify-content:center}
footer .fc-ic svg{width:20px;height:20px;fill:none;stroke:#5eead4;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
footer .fc-lb{font-size:11.5px;color:#64748b;letter-spacing:.8px;margin-bottom:4px}
footer .fc-vl{font-size:17px;font-weight:700;color:#fff;letter-spacing:.3px;line-height:1.3}
footer .fc-vl a{color:#fff}
footer .fc-vl a:hover{color:#5eead4}
footer .fc-note{font-size:12px;color:#64748b;margin:-6px 0 18px}
footer .fc-ch-t{font-size:13px;font-weight:700;color:#e2e8f0;letter-spacing:.5px}
footer .fc-ch-e{font-size:10px;color:#475569;letter-spacing:2px;margin:3px 0 12px;text-transform:uppercase}
footer .fc-qrs{display:flex;gap:10px;flex-wrap:wrap}
footer .fc-qr{background:#fff;border-radius:10px;padding:8px 8px 7px;width:96px;text-align:center}
footer .fc-qr img{width:80px;height:80px;display:block;border-radius:5px}
footer .fc-qr .t{color:#0f172a;font-size:11.5px;font-weight:700;margin-top:6px}
footer .fc-qr .e{color:#94a3b8;font-size:8px;letter-spacing:.5px;margin-top:2px;text-transform:uppercase;white-space:nowrap}
footer .f-bottom{border-top:1px solid #1e293b;padding:20px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:13px;color:#475569}
footer .f-bottom i{margin:0 8px;font-style:normal;color:#334155}
/* 浮动客服 */
.float-cs{position:fixed;right:18px;bottom:90px;z-index:60;display:flex;flex-direction:column;gap:12px}
.float-cs .bub{width:52px;height:52px;border-radius:50%;background:#fff;box-shadow:0 6px 20px rgba(15,23,42,.16);display:flex;align-items:center;justify-content:center;cursor:pointer;position:relative;transition:transform .2s,box-shadow .2s}
.float-cs .bub:hover{transform:scale(1.06);box-shadow:0 8px 26px rgba(15,23,42,.22)}
.float-cs .bub svg{width:24px;height:24px}
.float-cs .ic-phone{fill:none;stroke:#f05542;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.float-cs .ic-wx{fill:#07C160}
.float-cs .pop{display:none;position:absolute;right:64px;top:50%;transform:translateY(-50%);background:#fff;border-radius:10px;box-shadow:0 10px 28px rgba(15,23,42,.16);padding:12px 18px;text-align:center;color:var(--ink);font-size:13px;white-space:nowrap}
.float-cs .pop::after{content:"";position:absolute;right:-5px;top:50%;transform:translateY(-50%) rotate(45deg);width:10px;height:10px;background:#fff;border-radius:2px}
.float-cs .bub:hover .pop{display:block}
.float-cs .pop b{color:#0e7490}
.float-cs .pop img{width:140px;display:block;margin-bottom:8px;border-radius:6px}
.float-cs .pop .qr-t{white-space:normal;width:150px;line-height:1.6}
/* 移动端汉堡菜单（纯CSS） */
.nav .burger{display:none;margin-left:auto;font-size:22px;cursor:pointer;padding:6px 10px;color:var(--ink)}
#menu-toggle{display:none}
/* 一级菜单 9 项在 ≤1100px 的可用宽度（约 735px）下已排不下，
   这里就把导航切到汉堡菜单；更窄的 960 断点只负责内容区布局。 */
@media(max-width:1200px){
  .nav{flex-wrap:wrap;height:auto;padding:12px 0;gap:0}
  .nav .burger{display:block}
  .nav ul{display:none;flex-direction:column;width:100%;order:3;margin-left:0;padding-top:8px}
  .nav li>a{padding:10px 13px}
  .nav li{width:100%}
  .nav .drop{position:static;box-shadow:none;border:none;border-left:2px solid #a5f3fc;margin-left:12px;min-width:0}
  #menu-toggle:checked~ul{display:flex}
  .nav .lang{margin-left:0}
}
@media(max-width:960px){.cards{grid-template-columns:repeat(2,1fr)}.adv .list{grid-template-columns:repeat(2,1fr)}.about-grid{grid-template-columns:1fr}.hero h1{font-size:34px}footer .cols{grid-template-columns:1fr}}

/* ---- 首页轮播（HTML 帧，设计稿 1920×904 等比缩放） ---- */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.hslider{position:relative;overflow:hidden;background:#0d3a4f;width:100%}
.hslide{position:absolute;inset:0;display:block;opacity:0;transition:opacity .8s ease;pointer-events:none;overflow:hidden}
.hslide.on{opacity:1;z-index:1;pointer-events:auto}
.hscale{position:absolute;top:0;left:0;width:1920px;height:904px;transform-origin:0 0}
.hscale iframe{width:1920px;height:904px;border:0;display:block}
.hscale .hoverlay{position:absolute;top:0;left:0;width:1920px;height:904px;z-index:3;display:block}
.hprev,.hnext{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:44px;height:44px;border-radius:50%;border:0;background:rgba(255,255,255,.22);color:#fff;font-size:26px;line-height:1;cursor:pointer;backdrop-filter:blur(4px);transition:background .2s}
.hprev:hover,.hnext:hover{background:rgba(255,255,255,.42)}
.hprev{left:22px}.hnext{right:22px}
.hdots{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);z-index:2;display:flex;gap:9px}
.hdots button{width:10px;height:10px;border-radius:999px;border:0;background:rgba(255,255,255,.45);cursor:pointer;transition:all .25s;padding:0}
.hdots button.on{width:26px;background:#fff}
@media(max-width:768px){
.hprev,.hnext{width:34px;height:34px;font-size:20px}
.hprev{left:10px}.hnext{right:10px}
.hslider .hscale>div>div{min-height:560px!important;padding:40px 20px!important}
.hslider h1{font-size:30px!important;letter-spacing:2px!important}
.hslider p{font-size:14px!important}
}

/* ================= 技术资源内容页（文档式 v2，GEO 导向） ================= */
.doc{max-width:1180px;margin:0 auto;padding:40px 24px 8px}
.doc-head{max-width:860px;border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:26px}
.doc-kicker{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;font-weight:700;letter-spacing:2.4px;color:#0e7490;text-transform:uppercase;margin-bottom:16px}
.doc-kicker::before{content:"";width:18px;height:2px;background:#0891b2;display:block}
.doc h1{font-size:38px;line-height:1.22;font-weight:800;color:var(--ink);margin:0 0 16px;letter-spacing:-.5px}
.doc-lead{font-size:16.5px;line-height:1.95;color:#3f4d63;margin:0 0 10px}
.doc-note{font-size:12.5px;color:#94a3b8;margin:0;letter-spacing:.3px}
.doc-body{display:grid;grid-template-columns:minmax(0,1fr) 246px;gap:56px;align-items:start}
.doc-main{min-width:0}

/* 要点框 */
.doc-facts{background:linear-gradient(180deg,#f6fbfc 0%,#fbfdfe 100%);border:1px solid #dbeef2;border-radius:14px;padding:22px 26px;margin:0 0 34px;position:relative;overflow:hidden}
.doc-facts::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,#06b6d4,#0e7490)}
.doc-facts-h{font-size:11.5px;font-weight:800;letter-spacing:2.2px;color:#0e7490;text-transform:uppercase;margin-bottom:12px}
.doc-facts ul{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:10px 26px}
.doc-facts li{position:relative;padding-left:18px;font-size:14.5px;line-height:1.75;color:#33455c}
.doc-facts li::before{content:"";position:absolute;left:2px;top:9px;width:6px;height:6px;border-radius:50%;background:#0891b2}

/* 章节 */
.doc-sec{margin-bottom:34px;scroll-margin-top:92px}
.doc-sec:empty{display:none}
.doc-sec>h2{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:800;color:var(--ink);margin:0 0 18px;line-height:1.4;letter-spacing:-.3px}
.doc-sec>h2 .doc-n{flex:0 0 auto;font-size:12px;font-weight:800;letter-spacing:1px;color:#0891b2;background:#ecfeff;border:1px solid #cffafe;border-radius:8px;padding:4px 8px;line-height:1}
.doc-sec>h2::after{content:"";flex:1 1 auto;height:1px;background:linear-gradient(90deg,#e2e8f0,transparent)}
.doc-sec h3{font-size:17px;font-weight:800;color:#0f172a;margin:28px 0 10px;padding-left:11px;border-left:3px solid #bae6fd;line-height:1.5}
.doc-sec p{font-size:15.5px;line-height:2;color:#3f4d63;margin:0 0 15px}
.doc-sec ul,.doc-sec ol{padding-left:0;margin:0 0 18px;list-style:none}
.doc-sec ul li,.doc-sec ol li{position:relative;padding-left:20px;font-size:15.5px;line-height:1.95;color:#3f4d63;margin-bottom:8px}
.doc-sec ul li::before{content:"";position:absolute;left:3px;top:10px;width:6px;height:6px;border-radius:50%;background:#94a3b8}
.doc-sec ol{counter-reset:oli}
.doc-sec ol li{counter-increment:oli}
.doc-sec ol li::before{content:counter(oli) ".";position:absolute;left:0;top:0;font-weight:700;color:#0891b2}
.doc-sec strong,.doc-sec b{color:#0f172a;font-weight:700}
.doc-sec a{color:#0e7490;text-decoration:none;border-bottom:1px solid #a5f3fc}
.doc-sec a:hover{border-color:#0891b2}

/* 步骤卡 */
.doc-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:0 0 18px;padding:0;list-style:none;counter-reset:none}
.doc-steps li{position:relative;display:flex;flex-direction:column;gap:8px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 16px 14px;margin:0;transition:border-color .2s,box-shadow .2s,transform .2s}
.doc-steps li:hover{border-color:#a5f3fc;box-shadow:0 6px 18px rgba(8,145,178,.08);transform:translateY(-2px)}
.doc-steps li::before{display:none}
.doc-step-n{font-size:12px;font-weight:800;letter-spacing:1px;color:#0891b2}
.doc-step-t{font-size:14.5px;font-weight:700;color:#1e293b;line-height:1.5}

/* 表格 */
.doc-table{overflow-x:auto;margin:0 0 22px;border:1px solid var(--line);border-radius:12px}
.doc-table table{width:100%;border-collapse:collapse;font-size:14px}
.doc-table th,.doc-table td{padding:11px 14px;text-align:left;vertical-align:top;line-height:1.7;color:#3f4d63;border-bottom:1px solid #eef2f6}
.doc-table th{background:#f4fbfc;font-weight:700;color:#0f172a;white-space:nowrap;font-size:13px}
.doc-table tbody tr:last-child td{border-bottom:0}
.doc-table tbody tr:hover{background:#fbfdfe}

/* 图 */
.doc figure{margin:0 0 24px}
.doc figure img{max-width:100%;height:auto;border:1px solid var(--line);border-radius:10px;display:block}
.doc figure figcaption{font-size:12.5px;color:#94a3b8;margin-top:8px}

/* FAQ */
.doc-faq details{border:1px solid var(--line);border-radius:12px;padding:0 20px;margin-bottom:12px;background:#fff;transition:border-color .2s,box-shadow .2s}
.doc-faq details[open]{border-color:#bae6fd;box-shadow:0 6px 20px rgba(8,145,178,.07)}
.doc-faq summary{cursor:pointer;display:flex;align-items:center;gap:10px;font-size:15.5px;font-weight:700;color:#1e293b;padding:16px 0;list-style:none}
.doc-faq summary::-webkit-details-marker{display:none}
.doc-faq summary::after{content:"+";margin-left:auto;color:#0891b2;font-weight:800;font-size:18px;line-height:1}
.doc-faq details[open] summary::after{content:"–"}
.doc-faq .doc-ans{padding:0 0 18px;font-size:14.8px;line-height:1.95;color:#475569}

/* 引用 / 机器摘要 */
.doc-cite{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:22px 24px}
.doc-cite>h2{font-size:16px;margin-bottom:12px}
.doc-cite>h2::after{display:none}
.doc-cite>h2 .doc-n{font-size:11px;background:#eef2f6;border-color:#e2e8f0;color:#475569}
.doc-cite-line{font-size:13px;color:#475569;line-height:1.9;margin:0 0 8px;word-break:break-all}
.doc-cite-note{font-size:12.5px;color:#94a3b8;margin:0}
.doc-ai{border:1px dashed #cfd8e3;border-radius:12px;padding:0 22px;margin-top:16px;background:#fcfdfe}
.doc-ai summary{cursor:pointer;font-size:13.5px;font-weight:700;color:#475569;padding:15px 0;list-style:none}
.doc-ai summary::-webkit-details-marker{display:none}
.doc-ai-body dl{margin:0 0 16px;font-size:13px;line-height:1.9;color:#475569}
.doc-ai-body dt{font-weight:800;color:#0f172a;margin-top:12px;font-size:12px;letter-spacing:1px;text-transform:uppercase}
.doc-ai-body dd{margin:4px 0 0}
.doc-ai-body ul{margin:4px 0 0;padding-left:18px}

/* 右侧栏 */
.doc-side{position:sticky;top:92px}
.doc-toc{border-left:2px solid #e2e8f0;padding-left:16px;margin-bottom:22px}
.doc-toc-h{font-size:11px;font-weight:800;letter-spacing:2px;color:#94a3b8;text-transform:uppercase;margin-bottom:12px}
.doc-toc a{display:flex;gap:8px;align-items:baseline;font-size:13.5px;line-height:1.5;color:#64748b;text-decoration:none;padding:5px 0;transition:color .2s}
.doc-toc a span{font-size:11px;font-weight:700;color:#b6c2d2;min-width:16px}
.doc-toc a:hover,.doc-toc a:hover span{color:#0e7490}
.doc-side-card{background:linear-gradient(160deg,#f0fdfa,#ecfeff);border:1px solid #cffafe;border-radius:14px;padding:18px 18px 16px}
.doc-side-t{font-size:14px;font-weight:800;color:#0f172a;margin-bottom:8px}
.doc-side-card p{font-size:12.5px;line-height:1.8;color:#475569;margin:0 0 12px}
.doc-side-card a{font-size:13px;font-weight:700;color:#0e7490;text-decoration:none}
.doc-side-card a:hover{text-decoration:underline}

@media(max-width:1024px){
  .doc-body{grid-template-columns:1fr;gap:0}
  .doc-side{position:static;order:-1;margin-bottom:26px;display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:26px;align-items:start}
  .doc-toc{margin-bottom:0}
}
@media(max-width:760px){
  .doc{padding:28px 18px 6px}
  .doc h1{font-size:28px}
  .doc-sec>h2{font-size:19.5px}
  .doc-side{grid-template-columns:1fr;gap:16px}
}

/* 文档页：顶部导航不再吸顶，避免标题被压在导航下面；侧栏吸顶改为距顶 24px */
/* 文档页导航也常驻（与全站一致），锚点定位用 scroll-margin-top 补偿 */
/* 文档页导航吸顶：提升层级，避免正文（含相对定位块）盖住导航 */
body.doc-page header{position:sticky;top:0;z-index:300;background:#fff;isolation:isolate}
body.doc-page header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:var(--line)}
body.doc-page .doc,body.doc-page main{position:relative;z-index:1}
.doc-acc[id],[id^="sample-"]{scroll-margin-top:100px}
body.doc-page .doc-side{top:96px}
/* ================= 关于我们：本页锚点导航 ================= */
.about-nav{position:sticky;top:68px;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.about-nav .wrap{display:flex;gap:6px;overflow-x:auto;padding-top:10px;padding-bottom:10px;scrollbar-width:none}
.about-nav .wrap::-webkit-scrollbar{display:none}
.about-nav a{flex:0 0 auto;font-size:13.5px;font-weight:600;color:#475569;text-decoration:none;padding:7px 14px;border-radius:999px;white-space:nowrap;transition:color .2s,background .2s}
.about-nav a:hover{color:#0e7490;background:#ecfeff}
.about-nav a:first-child{color:#0e7490;background:#f0fdfa}
#profile,#services,#instruments,#quality,#contact-info{scroll-margin-top:132px}
@media(max-width:760px){.about-nav{top:0}.about-nav .wrap{padding-left:16px;padding-right:16px}#profile,#services,#instruments,#quality,#contact-info{scroll-margin-top:70px}}
/* ================= 返回顶部 ================= */
.to-top{cursor:pointer;padding:0;border:1px solid var(--line);position:fixed;right:20px;bottom:26px;z-index:70;width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:0 6px 20px rgba(15,23,42,.14);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s,transform .25s,visibility .25s,box-shadow .25s}
.to-top.on{opacity:1;visibility:visible;transform:none}
.to-top:hover{box-shadow:0 10px 26px rgba(15,23,42,.2)}
.to-top svg{width:20px;height:20px;fill:none;stroke:#0e7490;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
@media(max-width:760px){.to-top{right:14px;bottom:20px;width:40px;height:40px}}
@media(prefers-reduced-motion:reduce){.to-top{transition:none}}

/* ================= 关于我们：办公与实验环境画廊（两行三列，等尺寸裁切，无文字） ================= */
.fac-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.fac-gallery figure{margin:0;overflow:hidden;border-radius:14px;border:1px solid var(--line);background:#f1f5f9}
.fac-gallery img{width:100%;height:100%;aspect-ratio:3/2;object-fit:cover;display:block;transition:transform .5s ease}
.fac-gallery figure:hover img{transform:scale(1.035)}
@media(max-width:900px){.fac-gallery{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.fac-gallery{grid-template-columns:1fr}.fac-gallery img{aspect-ratio:16/10}}
#facility{scroll-margin-top:132px}

/* ================= 文档页：可折叠分组（各组学样本要求） ================= */
.doc-acc{border:1px solid var(--line);border-radius:12px;background:#fff;margin:0 0 12px;overflow:hidden}
.doc-acc>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;padding:15px 20px;font-size:15.5px;font-weight:700;color:#0f172a;background:#f8fafc;transition:background .2s}
.doc-acc>summary::-webkit-details-marker{display:none}
.doc-acc>summary::after{content:'＋';margin-left:auto;color:#0e7490;font-size:18px;font-weight:700}
.doc-acc[open]>summary{background:#ecfeff;color:#0e7490}
.doc-acc[open]>summary::after{content:'－'}
.doc-acc>summary em{font-style:normal;font-size:11.5px;font-weight:600;color:#0e7490;background:#e0f2fe;border-radius:999px;padding:2px 9px}
.doc-acc-body{padding:4px 20px 18px}
.doc-acc-body table{width:100%;border-collapse:collapse;margin:10px 0 14px;font-size:13.5px}
.doc-acc-body th,.doc-acc-body td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top;line-height:1.75}
.doc-acc-body th{background:#f0f9ff;font-weight:700;color:#0f172a;white-space:nowrap}
.doc-acc-body ul{margin:8px 0 10px;padding-left:20px}
.doc-acc-body li{font-size:13.8px;line-height:1.9;color:#334155;margin-bottom:4px}
.doc-acc-body h3{font-size:14px;font-weight:800;color:#0e7490;margin:14px 0 6px}
.doc-acc-body p{font-size:13.8px;line-height:1.9;color:#475569;margin:0 0 8px}

/* doc-dl 文案 */

/* 文档页：PDF 文件卡（与页面其它卡片同一视觉体系） */
.doc-dl{display:flex;align-items:center;gap:14px;max-width:520px;margin:10px 0 20px;padding:14px 18px;border:1px solid #e2e8f0;border-radius:14px;background:#fff;text-decoration:none;transition:all .2s;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.doc-dl:hover{border-color:#93c5fd;box-shadow:0 10px 26px rgba(37,99,235,.10);transform:translateY(-2px)}
.doc-dl-badge{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:46px;height:56px;border-radius:8px;background:#dc2626;color:#fff;font-size:11.5px;font-weight:800;letter-spacing:.5px;box-shadow:inset 0 -3px 0 rgba(0,0,0,.12)}
.doc-dl-badge::before{content:"";position:absolute}
.doc-dl-main{display:flex;flex-direction:column;gap:3px;min-width:0}
.doc-dl-main b{font-size:15px;font-weight:800;color:#0f172a;line-height:1.4}
.doc-dl-main em{font-style:normal;font-size:12.5px;color:#64748b}
.doc-dl-arrow{margin-left:auto;flex:0 0 auto;font-size:18px;color:#2563eb;font-weight:800}
a.doc-dl{border-bottom:0}
@media(max-width:600px){.doc-dl{max-width:none}.doc-dl-main b{font-size:14px}}

/* 韩语导航：标签更长，字号与间距略收，确保单行 */
html[lang="ko"] .nav ul{gap:1px}
html[lang="ko"] .nav li>a{font-size:13px;padding:8px 6px;letter-spacing:0}
html[lang="ko"] .lang{white-space:nowrap}
html[lang="ko"] .lang a{white-space:nowrap}