@font-face{font-family:Room;src:url(/fonts/room-regular.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:Room;src:url(/fonts/room-semibold.woff2) format('woff2');font-weight:600 900;font-display:swap}
:root{color-scheme:light;--paper:#f3f5f0;--surface:#fff;--ink:#17291f;--muted:#566459;--accent:#285c45;--accent-ink:#f7fbf8;--soft:#e2ebe3;--line:#cbd6cc;--brass:#9a6a2f;--brass-soft:#f4ead9;--radius:4px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.85 Room,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible+label,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
img{max-width:100%;height:auto;display:block}
p,h1,h2,h3,h4{margin:0}
.wrap{width:min(1200px,calc(100% - 80px));margin-inline:auto}
.skip{position:absolute;inset-inline-start:16px;top:-80px;background:var(--ink);color:var(--paper);padding:10px 14px;z-index:9}
.skip:focus{top:10px}
.arrow{font-size:1.1em;line-height:1}


.site-header{min-height:78px;display:flex;align-items:center;gap:28px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;gap:10px;align-items:center;line-height:1;color:var(--ink)}
.brand .mark{color:var(--accent);flex:none}
.wordmark{font-size:22px;font-weight:600;letter-spacing:-.6px}
.primary-nav{display:flex;align-items:center;gap:4px;margin-inline-start:auto}
.primary-nav a{padding:10px 18px;border-radius:var(--radius);font-size:14px;min-height:44px;display:inline-flex;align-items:center}
.primary-nav a[aria-current=page]{background:var(--accent);color:var(--accent-ink)}
.primary-nav a:hover:not([aria-current]){background:var(--soft)}
.nav-find{font-size:13px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:2px}
.nav-find:hover{color:var(--accent);border-color:var(--accent)}


.button{display:inline-flex;align-items:center;gap:22px;min-height:46px;padding:11px 22px;border-radius:var(--radius);background:var(--accent);color:var(--accent-ink);font-size:14px;white-space:nowrap}
.button:hover{background:var(--ink)}
.text-link{font-size:13px;color:var(--accent);display:inline-flex;gap:12px;align-items:center;border-bottom:1px solid currentColor;padding-bottom:2px}
.copy-btn{border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);border-radius:var(--radius);padding:9px 16px;min-height:44px;font-size:14px;cursor:pointer;white-space:nowrap}
.copy-btn:hover{background:var(--ink);border-color:var(--ink)}
.copy-btn.small{min-height:44px;padding:8px 14px;font-size:13px}
.copy-btn.is-done{background:var(--brass);border-color:var(--brass)}


.hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:56px;padding:56px 0 48px;align-items:start}
.kicker{font-size:13px;color:var(--accent);margin-bottom:18px;display:flex;align-items:center;gap:10px}
.kicker:before{content:'';width:28px;height:2px;background:var(--accent)}
.hero h1{font-size:clamp(34px,4vw,54px);line-height:1.38;letter-spacing:-1.5px;font-weight:600}
.hero h1 span{display:block}
.hero h1 span+span{color:var(--accent)}
.hero-intro{color:var(--muted);margin:22px 0 28px;max-width:540px;font-size:16px}
.hero-actions{display:flex;flex-wrap:wrap;gap:22px;align-items:center}
.code-card{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:26px 26px 22px;position:relative;box-shadow:0 1px 0 var(--line),12px 12px 0 var(--soft)}
.code-label{font-size:13px;color:var(--muted)}
.code-row{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:6px 0 12px;flex-wrap:wrap}
.code-value{font-size:40px;letter-spacing:3px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--ink)}
.code-benefit{font-size:15px;line-height:1.7}
.code-benefit sup{color:var(--brass)}
.code-foot{font-size:12px;color:var(--muted);margin-top:6px;line-height:1.7}
.pick{display:grid;gap:4px;margin-top:20px;padding:16px 18px;background:var(--brass-soft);border-radius:var(--radius);border-inline-start:3px solid var(--brass)}
.pick:hover{background:#efe0c6}
.pick-label{font-size:12px;color:var(--brass);letter-spacing:.5px}
.pick-title{font-size:17px;font-weight:600;line-height:1.55}
.pick-sub{font-size:13px;color:var(--muted)}


.section{padding:40px 0 46px;border-top:1px solid var(--line)}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.section-head h2{font-size:24px;font-weight:600;letter-spacing:-.4px}
.section-note{color:var(--muted);font-size:14px;max-width:520px}
.stations{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:2px solid var(--ink)}
.station{padding:22px 24px 26px 0;border-bottom:1px solid var(--line);position:relative}
.station:nth-child(3n+2),.station:nth-child(3n){padding-inline-start:24px;border-inline-start:1px solid var(--line)}
.station-head{display:flex;align-items:baseline;gap:12px;margin-bottom:8px}
.station-no{font-size:30px;font-weight:600;color:var(--accent);letter-spacing:-1px;font-variant-numeric:tabular-nums}
.station h3{font-size:19px;font-weight:600}
.station-text{color:var(--muted);font-size:14px;margin-bottom:12px}
.station-links{list-style:none;margin:0;padding:0}
.station-links li+li{margin-top:2px}
.station-links a{display:block;padding:7px 0;font-size:15px;line-height:1.6;border-bottom:1px dashed var(--line)}
.station-links a:hover{color:var(--accent)}
.tool-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.tool-card{display:grid;grid-template-columns:1fr auto;gap:4px 16px;align-items:center;padding:20px 22px;background:var(--ink);color:var(--paper);border-radius:6px}
.tool-card:hover{background:var(--accent)}
.tool-name{font-size:18px;font-weight:600}
.tool-desc{grid-column:1;font-size:13px;opacity:.82}
.tool-card .arrow{grid-row:1/3;grid-column:2}
.topic-chips{display:flex;flex-wrap:wrap;gap:10px}
.topic-chips a{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;min-height:44px;border:1px solid var(--line);border-radius:999px;font-size:14px;background:var(--surface)}
.topic-chips a:hover{border-color:var(--accent);color:var(--accent)}
.topic-chips small{color:var(--muted);font-size:12px}
.source-strip{display:grid;grid-template-columns:1fr 2fr;gap:40px;align-items:center}
.source-strip h2{font-size:24px;line-height:1.6}
.source-strip p{font-size:14px;color:var(--muted);margin-top:10px}
.source-links{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.source-links a{padding:20px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:14px}
.source-links a:hover strong{color:var(--accent)}
.source-links strong{display:block;font-size:16px}
.source-links small{display:block;color:var(--muted);font-size:13px;margin-top:6px}


.page-heading{padding:48px 0 36px;max-width:760px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--muted);margin-bottom:20px}
.breadcrumb a:hover{color:var(--accent)}
.page-heading h1{font-size:clamp(30px,3.6vw,44px);font-weight:600;line-height:1.4;letter-spacing:-1px}
.page-heading>p,.term-intro p{margin-top:16px;font-size:16px;color:var(--muted)}
.count-line{font-size:13px!important;color:var(--accent)!important}
.page-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;padding-bottom:64px}
.sidebar{border-top:2px solid var(--ink);padding-top:20px;align-self:start}
.sidebar h2{font-size:15px;margin-bottom:10px}
.sidebar p{color:var(--muted);font-size:14px;line-height:1.85}
.sidebar .text-link{margin-top:18px}
.side-sub{margin-top:26px}
.side-topics{list-style:none;margin:0 0 8px;padding:0}
.side-topics a{display:block;padding:6px 0;font-size:14px}
.side-topics a:hover{color:var(--accent)}
.find-label{display:block;font-size:14px;font-weight:600;margin-top:22px}
.find-input{width:100%;margin-top:8px;padding:10px 12px;min-height:44px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.find-results{list-style:none;margin:10px 0 0;padding:0}
.find-results a{display:block;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px;line-height:1.55}
.find-results small{display:block;color:var(--muted);font-size:12px}
.find-results .empty{color:var(--muted);font-size:13px;padding:6px 0}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.filter-radio{position:absolute;width:1px;height:1px;opacity:0}
.filters label{padding:8px 16px;min-height:44px;display:inline-flex;align-items:center;font-size:13px;border:1px solid var(--line);border-radius:var(--radius);cursor:pointer;background:var(--surface)}
.filters input:checked+label{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.entry-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.entry{padding:22px 0;border-bottom:1px solid var(--line)}
.entry.has-thumb{display:grid;grid-template-columns:200px minmax(0,1fr);gap:22px;align-items:start}
.entry-thumb img{width:100%;aspect-ratio:1200/630;border-radius:var(--radius);border:1px solid var(--line);background:var(--soft)}
.entry-thumb:hover img{border-color:var(--accent)}
.category{color:var(--accent);font-size:13px;margin-bottom:6px}
.entry h2{font-size:21px;line-height:1.6;font-weight:600}
.entry h2 a:hover{color:var(--accent)}
.entry-lede{color:var(--muted);font-size:15px;margin-top:6px;max-width:720px}
.entry-meta{font-size:12px;color:var(--muted);margin-top:8px}
.pager{display:flex;gap:20px;align-items:center;padding:22px 0;font-size:14px}
.pager a{color:var(--accent);border-bottom:1px solid currentColor}
.topic-grid{list-style:none;margin:0 0 64px;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.topic-grid li{padding:20px 22px;background:var(--surface);border:1px solid var(--line);border-radius:6px}
.topic-grid a{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.topic-grid strong{font-size:18px}
.topic-grid small{color:var(--muted)}
.topic-grid p{color:var(--muted);font-size:14px;margin-top:8px}
.resource{padding:24px 0;border-top:1px solid var(--line)}
.resource h2{font-size:19px;font-weight:600;margin:4px 0 8px;line-height:1.6}
.resource .kind{font-size:12px;color:var(--accent)}
.url-line{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:10px;align-items:center;word-break:break-all}
.url-line a{color:var(--accent);border-bottom:1px solid currentColor}
.url-line code{background:var(--soft);padding:3px 8px;border-radius:3px;font-size:12px}
.resource footer{margin-top:10px;font-size:13px;color:var(--muted)}
.resource footer a{color:var(--ink);border-bottom:1px solid var(--line)}


.article-page{padding:36px 0 56px}
.article-head{max-width:820px;margin-bottom:28px}
.article-head h1{font-size:clamp(28px,3.4vw,42px);line-height:1.42;letter-spacing:-1px;font-weight:600}
.article-lede{font-size:17px;color:var(--muted);margin-top:16px;max-width:760px}
.article-meta{font-size:13px;color:var(--muted);margin-top:16px}
.article-cover{margin:0 0 36px}
.article-cover img{width:100%;border-radius:6px;aspect-ratio:1200/630;object-fit:cover;background:var(--soft)}
.article-cover figcaption{font-size:12px;color:var(--muted);margin-top:8px}
.article-grid{display:grid;grid-template-columns:230px minmax(0,720px);gap:56px;align-items:start}
.article-grid:not(:has(.toc)){grid-template-columns:minmax(0,760px)}
.toc{position:sticky;top:20px;border-top:2px solid var(--ink);padding-top:16px;font-size:14px}
.toc-title{font-weight:600;margin-bottom:8px}
.toc ul{list-style:none;margin:0;padding:0}
.toc li a{display:block;padding:6px 0;color:var(--muted);line-height:1.5;border-bottom:1px solid var(--line)}
.toc li a:hover{color:var(--accent)}
.prose{font-size:17px;line-height:1.95;min-width:0}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:25px;line-height:1.5;margin-top:2em;font-weight:600;letter-spacing:-.3px;padding-top:18px;border-top:1px solid var(--line)}
.prose h3{font-size:19px;line-height:1.6;margin-top:1.6em;font-weight:600}
.prose a{color:var(--accent);border-bottom:1px solid currentColor}
.prose ul,.prose ol{padding-inline-start:1.4em}
.prose li+li{margin-top:.4em}
.prose strong{font-weight:600}
.prose blockquote{margin:1.2em 0;padding:4px 0 4px 18px;border-inline-start:3px solid var(--accent);color:var(--muted)}
.prose code{background:var(--soft);padding:2px 6px;border-radius:3px;font-size:.9em;word-break:break-all}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.prose .tip,.prose .warn,.prose .key{padding:16px 20px;border-radius:var(--radius);font-size:16px}
.prose .tip{background:var(--soft)}
.prose .warn{background:#f6e7e3;border-inline-start:3px solid #a2412e}
.prose .key{background:var(--brass-soft);border-inline-start:3px solid var(--brass);font-weight:600}
.prose .steps{counter-reset:s;list-style:none;padding:0}
.prose .steps>li{counter-increment:s;position:relative;padding-inline-start:46px;min-height:32px}
.prose .steps>li:before{content:counter(s);position:absolute;inset-inline-start:0;top:2px;width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--accent-ink);font-size:14px;display:grid;place-items:center;font-weight:600}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.table-wrap table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.7;min-width:520px}
.table-wrap th,.table-wrap td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:start;vertical-align:top}
.table-wrap th{background:var(--soft);font-weight:600;white-space:nowrap}
.table-wrap tr:last-child td{border-bottom:0}
.shot{margin:1.6em 0}
.shot img{border:1px solid var(--line);border-radius:var(--radius)}
.shot figcaption{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.7}
.figure-svg{margin:1.6em 0;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.figure-svg svg{width:100%;height:auto;display:block}
.figure-svg figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.faq h3{margin-top:1.3em}
.qa p{margin-top:.4em}
.signup-card{margin:1.8em 0;padding:22px 24px;background:var(--surface);border:2px solid var(--accent);border-radius:6px}
.signup-code{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.signup-label{font-size:13px;color:var(--muted)}
.signup-code strong{font-size:28px;letter-spacing:2px;font-weight:600}
.signup-text{font-size:15px;margin-top:10px}
.prose .signup-link{display:inline-flex;align-items:center;min-height:46px;margin-top:14px;padding:10px 20px;background:var(--accent);color:var(--accent-ink);border:0;border-radius:var(--radius);font-size:15px}
.prose .signup-link:hover{background:var(--ink)}
.signup-disclose{font-size:13px;color:var(--muted);margin-top:10px;line-height:1.7}
.article-after{max-width:1006px;margin-top:48px;padding-top:24px;border-top:2px solid var(--ink);display:grid;grid-template-columns:1fr 1fr;gap:24px 40px}
.tag-row{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px}
.tag-row-label{color:var(--muted);margin-inline-end:4px}
.tag{padding:5px 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface)}
a.tag:hover{border-color:var(--accent);color:var(--accent)}
.author-box p{font-size:14px;color:var(--muted)}
.author-box .author-name{font-size:16px;color:var(--ink);font-weight:600;margin-bottom:6px}
.author-box a{color:var(--accent);border-bottom:1px solid currentColor}
.related-title{font-weight:600;margin-bottom:6px}
.related ul{list-style:none;margin:0;padding:0}
.related a{display:block;padding:8px 0;border-bottom:1px solid var(--line);font-size:15px;line-height:1.6}
.related a span{display:block;font-size:12px;color:var(--accent)}
.related a:hover{color:var(--accent)}


.plain-page{max-width:760px;padding-bottom:64px}
.tool-page{max-width:860px;padding-bottom:64px}
.tool-box{background:var(--ink);color:var(--paper);border-radius:8px;padding:26px;display:grid;gap:16px}
.tool-box label{font-size:14px;opacity:.85;display:block;margin-bottom:6px}
.tool-box select,.tool-box textarea{width:100%;padding:12px 14px;border-radius:var(--radius);border:1px solid #3f584a;background:#0f1d16;color:#eef5f0;min-height:46px}
.tool-box textarea{min-height:88px;resize:vertical;font-family:ui-monospace,Consolas,monospace;font-size:15px;word-break:break-all}
.tool-result{border-radius:6px;padding:18px 20px;background:#0f1d16;border:1px solid #3f584a;min-height:96px}
.tool-verdict{font-size:24px;font-weight:600;line-height:1.4}
.tool-result ul{margin:10px 0 0;padding-inline-start:1.2em;font-size:15px;line-height:1.8}
.tool-result[data-state=ok]{border-color:#7fc39a}
.tool-result[data-state=ok] .tool-verdict{color:#9fe0b8}
.tool-result[data-state=warn]{border-color:#e0b46a}
.tool-result[data-state=warn] .tool-verdict{color:#f1cf8f}
.tool-result[data-state=bad]{border-color:#e58f7c}
.tool-result[data-state=bad] .tool-verdict{color:#f3ad9d}
.tool-guide{margin-top:28px;border-top:1px solid var(--line);padding-top:14px}
.tool-guide summary{cursor:pointer;font-weight:600;min-height:44px;display:flex;align-items:center}


.footer{border-top:2px solid var(--ink);padding:32px 0 40px;display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:24px 48px}
.foot-note{font-size:13px;color:var(--muted);margin-top:14px;line-height:1.85;max-width:620px}
.foot-note a{color:var(--accent);border-bottom:1px solid currentColor}
.foot-links{display:grid;grid-template-columns:1fr 1fr;gap:2px 20px;align-content:start}
.foot-links a{font-size:14px;padding:6px 0;min-height:44px;display:flex;align-items:center}
.foot-links a:hover{color:var(--accent)}
.foot-copy{grid-column:1/-1;font-size:12px;color:var(--muted)}

@media(prefers-color-scheme:dark){
:root{color-scheme:dark;--paper:#121e18;--surface:#18281f;--ink:#e6efe8;--muted:#a9bbae;--accent:#9fd0b1;--accent-ink:#10231a;--soft:#20352a;--line:#36503f;--brass:#d6a764;--brass-soft:#2c2618}
.pick:hover{background:#352d1c}
.prose .warn{background:#3a211b}
.tool-card{background:#0c1712;color:var(--ink)}
.tool-box{background:#0c1712}
.article-cover img,.shot img{filter:brightness(.92)}
}
@media(max-width:1060px){
.wrap{width:calc(100% - 56px)}
.hero{gap:32px}
.article-grid{grid-template-columns:200px minmax(0,1fr);gap:36px}
.page-grid{grid-template-columns:200px minmax(0,1fr);gap:32px}
.stations{grid-template-columns:repeat(2,minmax(0,1fr))}
.station:nth-child(3n+2),.station:nth-child(3n){padding-inline-start:0;border-inline-start:0}
.station:nth-child(2n){padding-inline-start:24px;border-inline-start:1px solid var(--line)}
}
@media(max-width:767px){
body{font-size:16px}
.wrap{width:calc(100% - 32px)}
.site-header{flex-wrap:wrap;gap:6px 14px;padding:14px 0 8px;min-height:0}
.primary-nav{order:3;width:100%;margin:0;justify-content:space-between;gap:2px}
.primary-nav a{padding:8px 12px;font-size:14px}
.nav-find{margin-inline-start:auto}
.hero{grid-template-columns:1fr;padding:24px 0 30px;gap:22px}
.kicker{margin-bottom:12px}
.hero h1{font-size:clamp(28px,7.6vw,38px);letter-spacing:-.8px}
.hero-intro{margin:14px 0 18px;font-size:15px}
.code-card{padding:18px 18px 16px;box-shadow:6px 6px 0 var(--soft)}
.code-value{font-size:32px}
.section{padding:30px 0 34px}
.stations{grid-template-columns:1fr}
.station,.station:nth-child(n){padding:18px 0 20px;border-inline-start:0}
.source-strip,.source-links,.page-grid,.article-grid,.article-after,.footer{grid-template-columns:1fr}
.source-strip{gap:12px}
.source-links{gap:0}
.page-heading{padding:28px 0 22px}
.page-grid{gap:22px}
.sidebar{order:2}
.toc{position:static}
.prose{font-size:16.5px;line-height:1.9}
.prose h2{font-size:22px}
.prose h3{font-size:18px}
.entry h2{font-size:19px}
.entry.has-thumb{grid-template-columns:110px minmax(0,1fr);gap:14px}
.entry.has-thumb .entry-lede{display:none}
.article-page{padding-top:22px}
.foot-links{grid-template-columns:1fr 1fr}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

@media (max-width:600px){.table-wrap table:not(:has(th:nth-child(4))){min-width:0}.table-wrap table:not(:has(th:nth-child(4))) th,.table-wrap table:not(:has(th:nth-child(4))) td{padding:10px 10px}.table-wrap table:not(:has(th:nth-child(4))) th{white-space:normal}}