:root{
  --bg:#f1f2ed;--paper:#fcfcf8;--ink:#17201d;--muted:#66716c;--line:#cbd1ca;
  --teal:#0e8f86;--teal-dark:#0b5e58;--teal-soft:#dceae7;--amber:#a9711a;--amber-soft:#efe4ce;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"IBM Plex Sans","Noto Sans TC",system-ui,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:var(--teal-dark);text-underline-offset:3px}.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}
.nav{position:sticky;top:0;z-index:10;background:var(--bg);border-bottom:1px solid var(--line)}
.nav-in{max-width:1120px;height:66px;margin:auto;padding:0 24px;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand svg,.brand img{width:30px;height:30px;display:block}.brand b{font-size:18px}.nav-links{margin-left:auto;display:flex;align-items:center;gap:22px}.nav-links a{color:var(--muted);font-size:13px;font-weight:600;text-decoration:none}.nav-links a[aria-current="page"],.nav-links a:hover{color:var(--ink)}
.back{border:1px solid var(--line);background:var(--paper);padding:7px 12px;border-radius:7px!important;color:var(--ink)!important}
.hero{border-bottom:1px solid var(--line)}.hero-in{max-width:1120px;margin:auto;padding:70px 24px 58px;display:grid;grid-template-columns:minmax(0,720px) 1fr;gap:60px;align-items:end}
.eyebrow{font:500 11px/1.4 "IBM Plex Mono",monospace;letter-spacing:.15em;text-transform:uppercase;color:var(--teal);margin-bottom:14px}.hero h1{font-size:clamp(35px,5vw,56px);letter-spacing:-.035em;line-height:1.08;margin:0 0 18px}.hero p{color:var(--muted);font-size:17px;max-width:62ch;margin:0}.meta{border-left:1px solid var(--line);padding-left:22px;font:12px/1.8 "IBM Plex Mono",monospace;color:var(--muted)}.meta b{display:block;color:var(--ink);font-family:"IBM Plex Sans","Noto Sans TC",sans-serif;font-size:13px}
.notice{max-width:1120px;margin:26px auto 0;padding:0 24px}.notice-in{border:1px solid #d7c49e;background:var(--amber-soft);padding:17px 20px;border-radius:8px;font-size:13.5px;color:#60430f}.notice-in strong{display:block;margin-bottom:3px;color:#543807}
.layout{max-width:1120px;margin:0 auto;padding:54px 24px 90px;display:grid;grid-template-columns:210px minmax(0,740px);gap:76px;align-items:start}
.toc{position:sticky;top:92px}.toc small{font:600 10px/1 "IBM Plex Mono",monospace;letter-spacing:.14em;color:var(--muted)}.toc ol{list-style:none;padding:14px 0 0;margin:0;border-top:1px solid var(--line)}.toc a{display:block;padding:7px 0;color:var(--muted);font-size:12.5px;text-decoration:none}.toc a:hover{color:var(--ink)}
.prose section{scroll-margin-top:90px;padding:0 0 38px;margin:0 0 38px;border-bottom:1px solid var(--line)}.prose section:last-child{border-bottom:0}.num{font:600 11px/1 "IBM Plex Mono",monospace;color:var(--teal);letter-spacing:.12em}.prose h2{font-size:24px;line-height:1.25;letter-spacing:-.015em;margin:10px 0 15px}.prose h3{font-size:16px;margin:24px 0 6px}.prose p{font-size:14.5px;color:#34403b;margin:8px 0 13px}.prose li{font-size:14px;color:#34403b;margin:7px 0}.prose ul,.prose ol{padding-left:20px}.prose strong{color:var(--ink)}
.data-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.data-card{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:17px}.data-card b{display:block;font-size:14px;margin-bottom:5px}.data-card p{font-size:12.8px;margin:0;color:var(--muted)}
.callout{border-left:3px solid var(--teal);background:var(--teal-soft);padding:14px 17px;margin:18px 0;border-radius:0 7px 7px 0}.callout p{margin:0;color:#214b47;font-size:13.5px}.callout.warn{border-color:var(--amber);background:var(--amber-soft)}.callout.warn p{color:#5e4313}
.steps{counter-reset:step;list-style:none!important;padding:0!important}.steps>li{counter-increment:step;position:relative;padding:0 0 22px 48px;margin:0!important}.steps>li:before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:1px;font:600 11px/28px "IBM Plex Mono",monospace;text-align:center;width:30px;height:30px;border:1px solid var(--teal);border-radius:50%;color:var(--teal)}.steps b{display:block;font-size:14px}.steps span{display:block;color:var(--muted);font-size:13px}
.checklist{list-style:none;padding:0!important}.checklist li{position:relative;padding:10px 0 10px 28px;border-bottom:1px solid var(--line);margin:0}.checklist li:before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:700}
.cta{background:#12201d;color:#fff;border-radius:10px;padding:28px;margin-top:20px;display:flex;align-items:center;justify-content:space-between;gap:20px}.cta h3{margin:0 0 4px;color:#fff}.cta p{margin:0;color:rgba(255,255,255,.68)}.cta a{flex:none;background:var(--teal);color:#fff;text-decoration:none;border-radius:7px;padding:10px 16px;font-size:13px;font-weight:700}
footer{border-top:1px solid var(--line)}.foot{max-width:1120px;margin:auto;padding:28px 24px 38px;display:flex;justify-content:space-between;gap:30px;font-size:12px;color:var(--muted)}.foot-links{display:flex;gap:18px}.foot a{color:var(--muted);text-decoration:none}.foot a:hover{color:var(--ink)}
@media(max-width:760px){.nav-links a:not(.back){display:none}.hero-in{grid-template-columns:1fr;gap:26px;padding-top:48px}.meta{border-left:0;border-top:1px solid var(--line);padding:16px 0 0}.layout{grid-template-columns:1fr;padding-top:34px}.toc{display:none}.data-grid{grid-template-columns:1fr}.cta{align-items:flex-start;flex-direction:column}.foot{flex-direction:column}.foot-links{flex-wrap:wrap}}