html[data-theme=light]{
  --bg:#f7f6f2;--card:#ffffff;--sub:#efeee8;--line:#e2dfd6;--ink:#1c2421;--muted:#5b6661;
  --accent:#1f6f5c;--accent-ink:#ffffff;--accent-soft:#e2efe9;--link:#17695a;
  --note-bg:#fbf4e6;--note-line:#e8d3a6;--special:#b4462f;
  --d-bg:#f1f4ee;--d-card:#ffffff;--d-line:#d1ded5;--d-ink:#183c39;--d-muted:#526862;--d-accent:#3c8a73;--d-soft:#dfece3;
  color-scheme:light}
html[data-theme=dark]{
  --bg:#0f1412;--card:#171d1b;--sub:#1d2522;--line:#2b3531;--ink:#e7ece9;--muted:#9eaba5;
  --accent:#5cc0a0;--accent-ink:#0f1412;--accent-soft:#1b2d27;--link:#7fd3b6;
  --note-bg:#262116;--note-line:#54462a;--special:#f2917a;
  --d-bg:#151d1a;--d-card:#1c2723;--d-line:#2f3e38;--d-ink:#e3ede8;--d-muted:#a2b5ad;--d-accent:#5cc0a0;--d-soft:#22342d;
  color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:16px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang HK","PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif;
  font-size:17px;line-height:1.85;transition:background .25s,color .25s;overflow-wrap:anywhere}
a{color:var(--link);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
img,svg{max-width:100%}
.wrap{max-width:1100px;margin:0 auto;padding:0 16px}
.narrow{max-width:800px}
.muted{color:var(--muted)}
.small{font-size:14px}
.skip{position:absolute;left:-999px;top:0;background:var(--card);padding:8px 12px;z-index:100}
.skip:focus{left:8px;top:8px}

/* 頁首 */
.site-header{border-bottom:1px solid var(--line);background:var(--card)}
.hdr{display:flex;align-items:center;gap:16px;min-height:60px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none;font-weight:700;font-size:18px;letter-spacing:.02em}
.brand img{border-radius:7px}
.nav{display:flex;gap:4px 16px;flex-wrap:wrap;margin-left:auto;font-size:15px}
.nav a{color:var(--muted);text-decoration:none;padding:4px 0}
.nav a:hover{color:var(--ink)}
.tbtn{background:var(--sub);border:1px solid var(--line);color:var(--ink);border-radius:20px;padding:5px 13px;font:inherit;font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap}
.tbtn:hover{border-color:var(--accent)}

/* 文章 */
.article{padding-top:28px;padding-bottom:16px}
.crumbs{display:flex;gap:8px;font-size:14px;color:var(--muted)}
.crumbs a{color:var(--muted)}
h1{font-size:32px;line-height:1.4;margin:12px 0 12px;letter-spacing:.01em}
.lead{font-size:18px;color:var(--muted);margin:0 0 12px;line-height:1.8}
.byline{font-size:14px;color:var(--muted);margin:0 0 22px}
.hero{margin:0 0 26px}
.hero img{display:block;width:100%;height:auto;border-radius:12px;background:var(--sub)}
figcaption{font-size:13.5px;color:var(--muted);margin-top:8px;line-height:1.7}
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 20px;margin:0 0 30px}
.toc-h{margin:0 0 4px;font-weight:700;font-size:15px}
.toc ol{margin:0;padding-left:22px;font-size:15px;line-height:1.9}
.prose h2{font-size:23px;line-height:1.5;margin:40px 0 12px;padding-top:4px}
.prose h3{font-size:18px;margin:22px 0 6px;line-height:1.6}
.prose p{margin:0 0 16px}
.table-wrap{overflow-x:auto;margin:18px 0 22px;border:1px solid var(--line);border-radius:10px;background:var(--card)}
table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.7;overflow-wrap:normal}
#results td{white-space:nowrap}
th,td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
tbody tr:last-child td{border-bottom:0}
th{background:var(--sub);font-weight:700;white-space:nowrap}
.a-left{text-align:left}.a-right{text-align:right}
td.balls{white-space:nowrap}
.ball{display:inline-flex;align-items:center;justify-content:center;width:31px;height:31px;margin:1px 3px 1px 0;border-radius:50%;
  border:2px solid var(--accent);font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;background:var(--card);color:var(--ink)}
.ball.sp{border-color:var(--special);color:var(--special)}
.plus{margin:0 6px 0 2px;color:var(--muted);font-weight:700}
.diagram{margin:30px 0}
.diagram-svg{display:block;width:100%;height:auto;border-radius:12px}
.faq{margin-top:36px;border-top:1px solid var(--line)}
.qa{border-bottom:1px dashed var(--line);padding-bottom:6px}
.qa:last-child{border-bottom:0}
.disclaimer{margin-top:30px!important;padding:12px 16px;background:var(--note-bg);border:1px solid var(--note-line);border-radius:10px;font-size:15px}
.filter{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;margin:16px 0 0;font-size:15px}
.filter input{font:inherit;font-size:15px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);min-width:0;flex:1 1 220px;max-width:340px}
.dl{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);text-decoration:none;border-radius:8px;padding:8px 14px;font-size:15px;font-weight:600}
.btn.ghost{background:transparent;color:var(--link);border:1px solid var(--line)}
details.more{margin:-6px 0 22px}
details.more summary{cursor:pointer;color:var(--link);font-size:15px}

/* 卡片 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:18px}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--ink);transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--accent);transform:translateY(-2px)}
.card img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;background:var(--sub)}
.card-body{display:flex;flex-direction:column;gap:6px;padding:14px 16px 18px}
.tag{align-self:flex-start;font-size:12.5px;font-weight:600;color:var(--accent);background:var(--accent-soft);border-radius:6px;padding:2px 8px}
.card-title{font-weight:700;font-size:17px;line-height:1.55}
.card-desc{font-size:14.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.related{padding-bottom:40px}
.related h2{font-size:22px;margin:24px 0 16px}

/* 首頁 */
.home{padding-bottom:30px}
.intro{padding:40px 0 8px;max-width:820px}
.intro h1{font-size:36px;margin-top:0}
.latest{display:grid;grid-template-columns:1fr auto;gap:8px 24px;align-items:center;background:var(--card);border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:14px;padding:20px 24px;margin:20px 0 10px}
.latest h2{margin:0;font-size:21px}
.latest p{margin:4px 0 0}
.kicker{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.06em;margin:0!important}
.latest-balls{display:flex;flex-wrap:wrap;align-items:center}
.latest-balls .ball{width:40px;height:40px;font-size:16px}
.latest-links{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:6px 20px;font-size:15px}
.cat{margin-top:44px}
.cat h2{font-size:25px;margin:0 0 2px}
.cat>p{margin:0 0 16px}
.principles{margin-top:48px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px 26px}
.principles h2{margin:0 0 8px;font-size:22px}
.principles ul{padding-left:20px;margin:0 0 10px}
.principles li{margin:6px 0}
.sources li{margin:4px 0}
.notfound{padding:70px 16px}

/* 頁尾 */
.site-footer{border-top:1px solid var(--line);background:var(--card);margin-top:30px;padding:22px 0 30px;font-size:14.5px;color:var(--muted)}
.site-footer p{margin:6px 0}
.foot-links{display:flex;flex-wrap:wrap;gap:6px 18px}

@media (max-width:640px){
  body{font-size:16.5px}
  h1{font-size:26px}
  .intro{padding-top:26px}
  .intro h1{font-size:28px}
  .prose h2{font-size:21px}
  .latest{grid-template-columns:1fr;padding:16px 18px}
  .latest-balls .ball{width:36px;height:36px;font-size:15px}
  .nav{order:3;width:100%;margin-left:0;font-size:14.5px}
  .tbtn{margin-left:auto}
  .toc{padding:12px 16px}
  th,td{padding:9px 10px}
  #results .ball{width:27px;height:27px;font-size:13px;margin-right:2px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}