:root{--accent:#087749;--ink:#141815;--muted:#66706b;--line:#dce1de;--soft:#f5f6f7;--danger:#ce554b;color-scheme:light;font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;color:var(--ink);background:#fff;font-size:16px;line-height:1.7;letter-spacing:0}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:5px}button,input{font:inherit;letter-spacing:0}button,a,input{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.4;letter-spacing:0}img{max-width:100%}.muted,time,.article-date{color:var(--muted)}.skip-link{position:fixed;top:8px;left:8px;transform:translateY(-200%);background:white;padding:10px;z-index:9}.skip-link:focus{transform:none}
.site-header{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:0 max(28px,calc((100% - 1280px)/2));border-bottom:1px solid var(--line);background:#fff}.brand{font-size:24px;font-weight:750;text-decoration:none;white-space:nowrap}.site-header nav{display:flex;gap:40px;align-self:stretch}.site-header nav a{display:flex;align-items:center;text-decoration:none;border-bottom:3px solid transparent;padding:20px 0;font-size:17px;white-space:nowrap}.site-header nav a[aria-current]{border-bottom-color:var(--accent)}
main{max-width:1280px;padding:0 28px;margin:auto}.page-heading{padding:42px 0 24px}.page-heading h1{font-size:46px;margin-bottom:10px}.page-heading>p{font-size:19px;color:#434d47;margin-bottom:0}.library-layout{display:grid;grid-template-columns:minmax(0,1fr) 282px;gap:70px;margin-bottom:22px}.article-row{display:grid;grid-template-columns:240px minmax(0,1fr);gap:30px;padding:20px 0;border-bottom:1px solid var(--line);align-items:center}.article-row:first-child{padding-top:10px}.article-row:last-child{border-bottom:0}.thumbnail{display:block;aspect-ratio:1.65;border-radius:4px;background-image:url("thumbnails.png");background-repeat:no-repeat;background-size:300% auto;background-color:var(--soft)}.thumbnail-0{background-position:0 64%}.thumbnail-1{background-position:50% 50%}.thumbnail-2{background-position:100% 54%}.category{color:var(--accent);font-size:14px;font-weight:650;margin-bottom:9px}.article-row h2{font-size:22px;margin-bottom:8px;overflow-wrap:anywhere}.article-row h2 a{text-decoration:none}.article-row h2 a:hover{text-decoration:underline}.summary{font-size:15px;line-height:1.8;margin-bottom:10px;color:#3e4741}time{font-size:14px;font-variant-numeric:tabular-nums}
.checklist{padding-top:8px}.checklist h2{font-size:24px;margin-bottom:25px}.check-row{display:flex;gap:14px;align-items:flex-start;padding:14px 0;font-size:16px;cursor:pointer}.check-row input{width:22px;height:22px;margin:2px 0 0;flex-shrink:0;accent-color:var(--accent)}.check-row span{overflow-wrap:anywhere}.completion{border-top:1px solid var(--line);margin-top:22px;padding-top:22px;display:flex;align-items:center;gap:14px}.completion output{font-size:19px;min-width:52px;color:var(--accent);font-variant-numeric:tabular-nums}progress{width:100%;height:12px;accent-color:var(--accent)}.check-actions{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:18px}.check-actions button{display:grid;place-items:center;width:42px;height:42px;padding:0;color:var(--danger);background:transparent;border:1px solid var(--line);border-radius:4px}.check-actions a{font-size:13px;color:var(--muted)}
.safety-band{background:var(--soft);border-top:1px solid var(--line);margin-top:36px}.safety-band>div{max-width:1280px;padding:26px 28px;margin:auto;border-left:4px solid var(--danger)}.safety-band h2{font-size:22px;margin-bottom:10px}.safety-band p{margin-bottom:6px}.safety-band .muted{font-size:14px}footer{display:flex;justify-content:center;flex-wrap:wrap;gap:20px;padding:30px 24px;color:var(--muted);font-size:14px}
.breadcrumbs{display:flex;gap:12px;flex-wrap:wrap;padding-top:25px;color:var(--muted);font-size:14px}.article-heading{max-width:930px;padding:34px 0 20px}.article-heading h1{font-size:36px;margin-bottom:20px;overflow-wrap:anywhere}.article-heading>p:not(.category):not(.article-date){font-size:19px;color:#434d47}.article-date{font-size:14px}.reading-layout{display:grid;grid-template-columns:minmax(0,790px) minmax(220px,1fr);gap:85px;align-items:start}.prose{font-size:18px;line-height:1.95;overflow-wrap:anywhere}.prose h2{font-size:25px;margin:30px 0 14px}.prose section:first-child h2{margin-top:12px}.prose p{margin-bottom:24px}.prose section{scroll-margin-top:20px}.prose ul{padding-left:24px}.takeaways,.sources{border-top:1px solid var(--line);margin-top:30px}.sources{font-size:15px}.sources li{margin:12px 0}.toc{position:sticky;top:28px;border-left:1px solid var(--line);padding-left:24px;margin-top:16px}.toc h2{font-size:18px}.toc ol{padding-left:20px;font-size:14px}.toc li{padding:8px 0}.toc a{text-decoration:none}.toc a:hover{text-decoration:underline}.checklist-link{display:block;margin-top:25px;font-size:14px;color:var(--accent)}.continue-reading{border-top:1px solid var(--line);margin-top:38px;padding-top:24px}.continue-reading h2{font-size:24px}.continue-reading>a{display:block;padding:12px 0;font-size:18px}.info-page{max-width:850px;margin-bottom:50px}.checklist-layout{display:grid;grid-template-columns:minmax(280px,390px) minmax(0,1fr);gap:90px;padding-bottom:30px}.checklist-layout .checklist{padding-top:30px}.preview-hub{max-width:960px;padding:42px 24px}.preview-hub h1{font-size:38px}.preview-hub ol{list-style:none;padding:0}.preview-hub li{padding:22px 0;border-bottom:1px solid var(--line)}.preview-hub li a{display:grid;gap:6px;text-decoration:none}.preview-hub li strong{font-size:22px}.preview-hub li p{font-size:14px;margin:8px 0 0}
@media(max-width:1050px){.library-layout{gap:36px;grid-template-columns:minmax(0,1fr) 245px}.article-row{grid-template-columns:160px minmax(0,1fr);gap:20px}.article-row h2{font-size:20px}.reading-layout{gap:40px}.site-header nav{gap:24px}.checklist-layout{gap:50px}}
@media(max-width:760px){.site-header{padding:16px 20px 0;display:block}.brand{font-size:22px}.site-header nav{display:flex;gap:24px;min-height:48px}.site-header nav a{font-size:14px;padding:12px 0}main{padding:0 20px}.page-heading{padding:28px 0 22px}.page-heading h1{font-size:32px}.page-heading>p{font-size:16px}.library-layout,.reading-layout,.checklist-layout{display:block}.article-row{grid-template-columns:110px minmax(0,1fr);gap:16px;padding:24px 0;align-items:start}.thumbnail{aspect-ratio:1}.article-row h2{font-size:18px}.category{font-size:12px;margin-bottom:5px}.summary{font-size:14px;margin-bottom:8px}.article-row time{font-size:12px}.checklist{border-top:1px solid var(--line);padding-top:28px;margin-top:24px}.checklist h2{font-size:23px;margin-bottom:10px}.check-row{padding:14px 0}.completion{max-width:420px}.check-actions{max-width:420px}.safety-band>div{padding:24px 20px}.safety-band h2{font-size:21px}.safety-band p{font-size:15px}.safety-band .muted{font-size:13px}.article-heading{padding-top:25px}.article-heading h1{font-size:29px}.article-heading>p:not(.category):not(.article-date){font-size:16px}.prose{font-size:17px}.prose h2{font-size:23px}.toc{position:static;border-top:1px solid var(--line);border-left:0;padding:24px 0;margin-top:30px}.continue-reading>a{font-size:16px}.breadcrumbs{font-size:12px}.checklist-layout .prose{margin-top:35px}footer{gap:14px;font-size:12px}.preview-hub h1{font-size:30px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}