:root{color-scheme:light dark;--bg:#0b1220;--panel:#121a2b;--text:#e9eefc;--muted:#a9b4cf;--brand:#4a9eda;--brand-2:#e6a817;--ok:#27c07d;--warn:#ffb44c;--danger:#ff5a7a}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
html,body{margin:0;padding:0;overflow-x:hidden;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans TC","PingFang TC","Microsoft JhengHei","Helvetica Neue",Arial,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol",sans-serif}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
header{position:sticky;top:0;z-index:50;backdrop-filter:saturate(150%) blur(8px);background:rgba(18,26,43,.8);border-bottom:1px solid rgba(255,255,255,.06)}
.container{max-width:1080px;margin:0 auto;padding:0 20px;overflow-wrap:break-word}
.nav{display:flex;align-items:center;gap:16px;min-height:56px;padding:10px 0}
.brand{font-weight:700;color:var(--text);letter-spacing:.2px}
.links{display:flex;gap:14px;flex-wrap:wrap}
.links a{font-size:14px;color:var(--muted);padding:6px 8px;border-radius:6px}
.links a.active{color:#061225;background:var(--brand);text-decoration:none}
.hero{padding:64px 0;background:radial-gradient(1200px 420px at 20% 0%, rgba(74,158,218,.2), transparent 70%),radial-gradient(900px 420px at 80% 0%, rgba(230,168,23,.15), transparent 70%);border-bottom:1px solid rgba(255,255,255,.06)}
.hero h1{margin:0 0 12px;font-size:36px;line-height:1.2}
.hero p{margin:0;color:var(--muted);font-size:16px}
.hero .container.hero-layout{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;align-items:center}
.hero-illustration{background:linear-gradient(140deg,rgba(74,158,218,.16),rgba(230,168,23,.12));border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:10px;min-height:170px}
.hero-illustration svg{width:100%;height:100%}
.grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:900px){.grid{grid-template-columns:2fr 1fr}}
.panel{background:var(--panel);border:1px solid rgba(255,255,255,.06);border-radius:12px;padding:18px}
h1,h2,h3{margin:0}
h2{margin:26px 0 12px;font-size:22px}
h3{margin:18px 0 8px;font-size:18px}
ul{margin:10px 0 14px;padding-left:18px}
li{margin:6px 0}
.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);padding:2px 6px;border-radius:6px}
.note{color:var(--muted);font-size:14px}
.callout{border-left:4px solid var(--brand);padding-left:12px;margin:8px 0 16px}
.checklist{list-style:none;padding:0;margin:8px 0 12px}
.checklist li{display:flex;align-items:start;gap:8px}
.ok{color:var(--ok)}
.warn{color:var(--warn)}
.danger{color:var(--danger)}
.foot{margin-top:24px;border-top:1px dashed rgba(255,255,255,.12);padding-top:10px;font-size:14px;color:var(--muted)}
.toc{columns:2;column-gap:18px}
.toc a{display:block;margin:6px 0}
.section{scroll-margin-top:76px}
.code-block{background:#0d1425;border:1px solid rgba(255,255,255,.06);border-radius:8px;padding:12px;margin:10px 0 16px;overflow:auto}
.code-block pre{margin:0;font-size:14px;line-height:1.6}
.copy-btn{position:absolute;top:8px;right:8px;background:rgba(74,158,218,.18);color:var(--text);border:1px solid rgba(255,255,255,.2);border-radius:6px;padding:4px 8px;font-size:12px;cursor:pointer}
.copy-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.copy-ok{background:rgba(39,192,125,.22)}
.btn{display:inline-block;background:var(--brand);color:#061225;padding:8px 12px;border-radius:8px;font-weight:600;border:1px solid rgba(255,255,255,.18)}
.btn:hover{filter:brightness(1.05);text-decoration:none}
.ad-slot{overflow:hidden;min-height:0;display:flex;justify-content:center;align-items:center}
.ad-banner-wrap{overflow:hidden;background:rgba(255,255,255,.02);border-bottom:1px solid rgba(255,255,255,.06)}
.ad-top{margin:12px 0;min-height:90px}
.ad-side{min-height:250px;margin-bottom:16px}
.ad-end{margin-top:24px;min-height:90px;border-top:1px solid rgba(255,255,255,.06);padding-top:16px}
.layout{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:900px){.layout{grid-template-columns:2fr 1fr}}
.sidebar{display:flex;flex-direction:column;gap:16px}
.nav-toggle{display:none;background:transparent;border:1px solid rgba(255,255,255,.2);border-radius:8px;color:var(--text);padding:6px 10px;font-size:14px}
.deck{display:grid;gap:12px}
.deck-slide{display:none;background:#0d1425;border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:16px}
.deck-slide.active{display:block}
.deck-ctrl{display:flex;gap:10px;align-items:center}
.deck-btn{background:rgba(74,158,218,.18);border:1px solid rgba(255,255,255,.2);color:var(--text);padding:6px 10px;border-radius:8px;cursor:pointer}
.deck-index{font-size:13px;color:var(--muted)}
.timeline{display:grid;gap:10px}
.timeline-item{background:#0d1425;border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:12px}
.pill{display:inline-block;padding:2px 8px;border-radius:999px;background:rgba(74,158,218,.2);font-size:12px;color:var(--text)}
.showcase-filters{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 14px}
.showcase-chip{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);color:var(--text);padding:6px 10px;border-radius:999px;font-size:13px;cursor:pointer}
.showcase-chip.active{background:rgba(74,158,218,.28);border-color:rgba(74,158,218,.8)}
.showcase-grid{display:grid;grid-template-columns:1fr;gap:12px}
.showcase-card{background:#0d1425;border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:14px}
.showcase-count{font-size:13px;color:var(--muted)}
.quiz-card{background:#0d1425;border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:14px;margin:10px 0}
.quiz-opts{display:grid;gap:8px;margin-top:10px}
.quiz-opt{display:flex;gap:8px;align-items:flex-start;padding:8px 10px;border:1px solid rgba(255,255,255,.14);border-radius:8px}
.quiz-submit{margin-top:12px;background:rgba(74,158,218,.2);border:1px solid rgba(255,255,255,.2);color:var(--text);padding:8px 12px;border-radius:8px;cursor:pointer}
.quiz-result{margin-top:12px;font-size:15px}
.quiz-good{color:var(--ok)}
.quiz-mid{color:var(--warn)}
.quiz-bad{color:var(--danger)}
footer{margin:32px 0;color:var(--muted);font-size:14px}
@media(max-width:899px){
  .container{padding:0 14px}
  .nav{align-items:flex-start;flex-direction:column;gap:10px}
  .nav-toggle{display:block}
  .links{display:none;width:100%;flex-direction:column;gap:6px;overflow:visible;padding-bottom:0}
  .links a{display:block;white-space:normal}
  header.nav-open .links{display:flex}
  .hero{padding:36px 0}
  .hero h1{font-size:28px}
  .hero p{font-size:15px}
  .hero .container.hero-layout{grid-template-columns:1fr}
  .hero-illustration{min-height:120px}
  .panel{padding:14px}
  h2{font-size:20px}
  h3{font-size:17px}
  .code-block pre{font-size:13px}
  .copy-btn{top:6px;right:6px}
  .deck-slide{padding:12px}
  .showcase-chip{font-size:12px}
  .toc{columns:1}
  .ad-side{display:none}
}