:root{--paper:#fcfcfa;--ink:#242821;--accent:#a83b0a;--button:#ce4100;--muted:#73776f;--line:#e4e6df;--tint:#f3f4ef}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Microsoft YaHei','PingFang SC',Arial,sans-serif;line-height:1.9}a{color:var(--accent);text-underline-offset:4px;overflow-wrap:anywhere}a:focus-visible,summary:focus-visible,[tabindex]:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:5px}img{max-width:100%}.shell{max-width:1180px;padding:0 40px;margin:auto}
header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:25px 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-size:14px;font-weight:700}.brand svg{width:29px;height:29px;flex-shrink:0}.brand small{display:none}header nav{display:flex;align-items:center;gap:27px;font-size:12px}header a{text-decoration:none;color:var(--muted)}header a:hover{color:var(--accent)}.skip{position:fixed;top:10px;left:12px;transform:translateY(-200%);background:white;padding:8px 16px;z-index:10}.skip:focus{transform:none}.draft{max-width:760px;margin:18px auto 0;font-size:11px;color:var(--muted)}
.reading-layout{max-width:760px;display:grid;grid-template-columns:minmax(0,1fr);grid-template-areas:'heading' 'sidebar' 'body';gap:0;margin:40px auto 0}.article-head{grid-area:heading;min-width:0;margin:0;padding:0 0 30px}.category{font-size:13px;color:var(--accent);margin:0 0 18px}h1{font:700 clamp(34px,3.2vw,43px)/1.5 'Microsoft YaHei','PingFang SC',sans-serif;letter-spacing:-1px;margin:0 0 22px}.title-phrase{white-space:nowrap}.deck{font-size:16px;color:#61675c;line-height:1.95;margin:0 0 22px}.article-meta{font-size:12px;color:var(--muted);margin:0}
.contents{min-width:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0;margin-bottom:32px;font-size:13px}.contents summary{font-size:13px;font-weight:500;color:#5c6257;cursor:pointer}.contents nav{display:grid;grid-template-columns:1fr 1fr;gap:13px 24px;margin:20px 0 7px}.contents nav a{display:flex;gap:12px;align-items:baseline;text-decoration:none;color:#5c6257;line-height:1.7}.contents nav a:hover{color:var(--accent)}.toc-index{font-size:10px;color:#93978d;font-variant-numeric:tabular-nums}
article{min-width:0;font-size:17px;overflow-wrap:anywhere;color:#3e443a}.reading-layout>article{grid-area:body;padding:0}article p{margin:0 0 24px}article>p:first-child{font-size:18px;color:var(--ink);margin-top:0}h2{font:700 25px/1.6 'Microsoft YaHei','PingFang SC',sans-serif;color:var(--ink);letter-spacing:-.4px;margin:43px 0 20px;padding-top:26px;border-top:1px solid var(--line);scroll-margin-top:28px}article ul,article ol{padding-left:24px;margin:20px 0 26px}li{padding-left:3px;margin:10px 0}strong{font-weight:700;color:#282e24}code{font:.88em Consolas,'Microsoft YaHei',monospace;background:#f0f2eb;border-radius:4px;padding:2px 5px}pre{overflow-x:auto;white-space:pre;background:#293025;color:#f2f4ed;border-radius:8px;padding:23px;line-height:1.8;margin:25px 0}pre code{color:inherit;background:none;padding:0;font-size:14px;overflow-wrap:normal}blockquote{margin:26px 0;background:#f1f3ec;border-left:3px solid #a8b39b;border-radius:0 7px 7px 0;padding:19px 23px;color:#4e5945;font-size:15px;line-height:1.95}blockquote p:last-child{margin-bottom:0}article p>img,article p>a>img{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:8px}article p:has(>em:only-child){font-size:12px;color:var(--muted)}
.download{display:inline-block;background:var(--button);color:#fff;border-radius:6px;padding:10px 19px;text-decoration:none;font-size:13px;font-weight:600;line-height:1.6}.download:hover{background:#b53b00}.table-wrap{max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:8px;margin:24px 0}table{border-collapse:collapse;min-width:560px;width:100%;font-size:14px;line-height:1.8}td,th{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}th{background:var(--tint)}tr:last-child td{border-bottom:0}.table-hint{font-size:13px;color:var(--muted)}article details{padding:15px 0;border-top:1px solid var(--line);margin:15px 0}article summary{font-size:16px;font-weight:600;color:var(--accent);cursor:pointer}article details[open]>summary{margin-bottom:18px}article details p{font-size:16px}
footer{display:flex;align-items:center;gap:20px;font-size:11px;color:var(--muted);padding:27px 0;margin-top:45px;border-top:1px solid var(--line)}footer span:first-child{font-weight:700;color:var(--ink)}footer a{margin-left:auto;color:var(--muted)}.checklist-page{max-width:760px;margin:42px auto}.checklist-page h1{font-size:30px}.checklist-page ul{list-style:none;padding-left:0}.check-item{padding:12px 0;border-bottom:1px solid var(--line)}.check-item label{display:flex;gap:12px;align-items:flex-start;cursor:pointer}.check-item input{width:19px;height:19px;flex-shrink:0;margin:6px 0 0;accent-color:var(--accent)}.checklist-note{font-size:13px;color:var(--muted)}
@media(max-width:900px){.shell{padding:0 32px}.reading-layout{margin-top:34px}}
@media(max-width:600px){.shell{padding:0 24px}header{padding:21px 0;gap:14px}.brand{font-size:12px;gap:7px}.brand svg{width:25px;height:25px}header nav{gap:14px;font-size:11px}header nav>a:first-child{display:none}.draft{font-size:10px;margin-top:15px}.reading-layout{margin-top:28px}.article-head{padding-bottom:25px}.category{font-size:12px;margin-bottom:15px}h1{font-size:30px;line-height:1.5;letter-spacing:-.7px}.title-break{display:none}.deck{font-size:14px;margin-bottom:18px}.article-meta{font-size:11px}.contents{margin-bottom:26px;padding:12px 0}.contents nav{grid-template-columns:1fr;gap:14px}.reading-layout>article{padding:0;font-size:17px}article>p:first-child{font-size:18px}h2{font-size:23px;margin-top:34px;padding-top:23px}blockquote{padding:16px 18px;font-size:14px}footer{flex-wrap:wrap;gap:10px;margin-top:35px}.checklist-page{margin:30px auto}}
@media(max-width:380px){.shell{padding:0 21px}h1{font-size:28px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{header,.draft,.contents,.skip,.download,footer{display:none}.shell{max-width:none;padding:0}.reading-layout{display:block;margin:0;max-width:none}.article-head{margin:0;padding:0}article{padding:0}body{background:white}pre{white-space:pre-wrap}.table-wrap{overflow:visible}table{min-width:0}}

/* Identity and directory share the same left column on wide screens. */
.reader-sidebar{grid-area:sidebar;min-width:0}.ip-card{display:flex;align-items:center;gap:13px;margin:0 0 22px}.ip-card img{width:45px;height:60px;object-fit:cover;border-radius:9px;flex-shrink:0}.ip-copy{display:grid;grid-template-columns:auto auto;gap:2px 10px;line-height:1.8}.ip-copy strong{font-size:14px;margin:0}.ip-copy>span,.ip-copy p{font-size:11px;color:var(--muted);margin:0}.ip-copy a{font-size:11px;text-decoration:none}.ip-copy a:hover{text-decoration:underline}
@media(min-width:1000px){.draft{max-width:1004px}.reading-layout{max-width:1004px;grid-template-columns:200px minmax(0,760px);grid-template-areas:'sidebar heading' 'sidebar body';column-gap:44px;row-gap:0}.reader-sidebar{position:sticky;top:24px;align-self:start;max-height:calc(100vh - 48px);overflow:auto}.ip-card{display:block;width:100%;padding:20px;background:#fff;border:1px solid #e6e9e1;border-radius:15px;text-align:center;margin:0 0 22px}.ip-card img{display:block;width:112px;height:150px;border-radius:9px;margin:0 auto 16px}.ip-copy{display:block}.ip-copy strong{display:block;font-size:18px}.ip-copy>span{display:block;font-size:11px}.ip-copy p{margin:13px 0}.contents{padding:17px 8px;margin:0;border-bottom:0}.contents summary{font-weight:700}.contents nav{grid-template-columns:1fr;gap:13px;margin-top:18px}}
@media print{.reader-sidebar{display:none}}

article h3{font-size:21px;line-height:1.6;margin:36px 0 21px;color:var(--ink)}