:root{
  --bg:#07061a; --ink:#ebe6da; --muted:#b9b2c8;
  --accent:#c8b0ff; --accent-2:#e6c878; --line:rgba(230,200,120,.22); --line-soft:rgba(255,255,255,.10);
  --panel:rgba(12,10,28,.84); --paper:rgba(30,24,54,.78); --soft:rgba(230,200,120,.08);
  --maxw:880px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;background:var(--bg)}
body{margin:0;background:transparent;color:var(--ink);
  font-family:"Noto Serif TC","Noto Serif CJK TC","PingFang TC","Microsoft JhengHei","Noto Sans CJK TC",serif;
  line-height:1.85;font-size:17px;position:relative;min-height:100vh}

/* ===== 宇宙背景（純 CSS＋自繪 SVG） ===== */
.cosmos{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none;
  background:
    radial-gradient(ellipse 60% 45% at 18% 12%,rgba(98,70,170,.35),transparent 70%),
    radial-gradient(ellipse 55% 40% at 88% 85%,rgba(40,90,150,.30),transparent 70%),
    radial-gradient(ellipse 40% 30% at 75% 20%,rgba(160,70,130,.18),transparent 70%),
    url(bg-galaxy.svg) center/cover no-repeat,
    linear-gradient(160deg,#0b0820 0%,#07061a 45%,#050414 100%)}
.cosmos>div{position:absolute;inset:0}
.c-stars{background:url(bg-stars.svg) 0 0/420px 420px repeat;opacity:.85}
.c-twinkle{background:url(bg-stars2.svg) 120px 60px/640px 640px repeat;animation:twinkle 7s ease-in-out infinite alternate}
.c-glyphs{background:url(bg-glyphs.svg) 40px 30px/780px 780px repeat;opacity:.26}
.c-wheel{inset:auto;left:50%;top:50%;width:min(118vmin,1000px);height:min(118vmin,1000px);
  margin:calc(min(118vmin,1000px) / -2) 0 0 calc(min(118vmin,1000px) / -2);
  background:url(bg-wheel.svg) center/contain no-repeat;opacity:.22;animation:spin 360s linear infinite}
.c-planets{background:
    url(planet-ringed.svg) right 3% top 13%/260px auto no-repeat,
    url(planet-blue.svg) left 2% top 62%/150px auto no-repeat,
    url(planet-moon.svg) left 9% top 52%/56px auto no-repeat,
    url(planet-red.svg) right 7% bottom 9%/120px auto no-repeat}
@keyframes twinkle{0%{opacity:.25}50%{opacity:.9}100%{opacity:.45}}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.c-twinkle,.c-wheel{animation:none}}

a{color:var(--accent)}
a:hover{color:var(--accent-2)}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:#fff;color:#241d33;padding:6px;z-index:10}
header.site{background:rgba(14,10,30,.88);color:#f3efe6;border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(230,200,120,.35),0 6px 24px rgba(0,0,0,.35);position:relative;z-index:2}
header.site .inner{max-width:1100px;margin:0 auto;padding:10px 16px;display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px}
header.site .brand{color:#f3efe6;text-decoration:none;font-weight:700;font-size:1.15rem;letter-spacing:.05em;white-space:nowrap}
header.site .brand span{color:#e6c878}
nav.main ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:2px 4px}
nav.main a{display:block;color:#e8e2d4;text-decoration:none;padding:4px 9px;border-radius:4px;font-size:.95rem;white-space:nowrap}
nav.main a:hover,nav.main a[aria-current="page"]{background:rgba(200,176,255,.18);color:#fff;box-shadow:inset 0 -2px 0 #e6c878}
main{max-width:var(--maxw);margin:28px auto 0;padding:26px 30px 40px;background:var(--panel);
  border:1px solid var(--line);border-radius:14px;
  box-shadow:0 0 0 1px rgba(0,0,0,.4),0 12px 48px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.04);
  -webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}
h1{font-size:1.9rem;line-height:1.35;margin:.4em 0 .2em;color:#fff;letter-spacing:.02em}
h2{font-size:1.4rem;margin:1.8em 0 .5em;padding-bottom:.25em;border-bottom:1px solid var(--line);color:#efd68f}
h2::before{content:"✦";font-size:.7em;color:#c8b0ff;margin-right:.45em;vertical-align:.15em}
h3{font-size:1.15rem;margin:1.4em 0 .4em;color:#d9c8ff}
strong{color:#fff}
.lead{font-size:1.08rem;color:var(--muted)}
.note{background:var(--soft);border-left:4px solid var(--accent-2);padding:10px 14px;margin:1.2em 0;font-size:.95rem;border-radius:0 6px 6px 0}
blockquote{margin:1em 0;padding:10px 16px;border-left:3px solid #c8b0ff;background:rgba(200,176,255,.08);border-radius:0 6px 6px 0;color:#efe9ff}
.toc{background:var(--paper);border:1px solid var(--line-soft);padding:10px 18px;border-radius:8px;font-size:.95rem}
.toc ol{margin:.3em 0;padding-left:1.4em}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1em 0}
table{border-collapse:collapse;width:100%;background:rgba(20,16,40,.85);font-size:.93rem}
th,td{border:1px solid rgba(255,255,255,.12);padding:6px 8px;text-align:left;vertical-align:top}
th{background:#2b2147;color:#f6e6b8;white-space:nowrap}
tbody tr:nth-child(even) td{background:rgba(255,255,255,.03)}
td.sym{font-family:"Noto Sans Symbols","Noto Sans Symbols 2","Segoe UI Symbol","Apple Symbols","Noto Serif TC",serif;font-size:1.6rem;text-align:center;line-height:1.2;white-space:nowrap;color:#efd68f}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:1.2em 0}
.card{background:var(--paper);border:1px solid var(--line-soft);border-radius:10px;padding:14px 16px;transition:border-color .2s,transform .2s}
.card:hover{border-color:rgba(230,200,120,.5)}
.card h3{margin:0 0 .3em}
.card p{margin:.3em 0;font-size:.95rem;color:#ddd7ca}
.card a.more{font-size:.9rem}
.sign h3 .glyph{font-size:1.4rem;color:var(--accent-2);margin-right:.25em}
.sign dl{margin:.4em 0;font-size:.93rem;display:grid;grid-template-columns:auto 1fr;gap:2px 10px}
.sign dt{color:var(--muted)}
.sign dd{margin:0}
.refs{font-size:.92rem;color:#d6d0c4}
.refs li{margin:.35em 0}
hr{border:0;border-top:1px solid var(--line)}
.hero{position:relative;overflow:hidden;color:#f3efe6;border-radius:12px;padding:30px 24px;margin-bottom:10px;
  border:1px solid rgba(230,200,120,.35);
  background:
    radial-gradient(ellipse 70% 120% at 100% 0%,rgba(200,176,255,.22),transparent 60%),
    linear-gradient(135deg,rgba(45,35,84,.80),rgba(26,20,52,.70))}
.hero::after{content:"";position:absolute;right:-70px;top:50%;width:260px;height:260px;margin-top:-130px;
  background:url(bg-wheel.svg) center/contain no-repeat;opacity:.18;pointer-events:none}
.hero>*{position:relative;z-index:1}
.hero h1{color:#fff;margin-top:0}
.hero p{color:#e6e0f2}
footer.site{background:rgba(14,10,30,.90);color:#cfc8b9;font-size:.88rem;margin-top:34px;border-top:1px solid var(--line)}
footer.site .inner{max-width:var(--maxw);margin:0 auto;padding:18px}
footer.site a{color:#e3c97a}
footer.site .disclaimer{border:1px solid rgba(230,200,120,.3);padding:10px 12px;border-radius:6px;background:rgba(40,32,70,.7)}
@media (max-width:900px){
  .c-planets{background:
    url(planet-ringed.svg) right -30px top 11%/170px auto no-repeat,
    url(planet-blue.svg) left -40px top 70%/120px auto no-repeat,
    url(planet-moon.svg) left 24px top 62%/40px auto no-repeat,
    url(planet-red.svg) right -10px bottom 6%/80px auto no-repeat}
}
@media (max-width:600px){
  body{font-size:16px}
  h1{font-size:1.55rem}
  header.site .inner{padding:8px 10px}
  nav.main a{padding:3px 7px;font-size:.9rem}
  main{margin:78px 10px 0;padding:16px 14px 30px;border-radius:10px;background:rgba(12,10,28,.66);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}
  .hero{background:radial-gradient(ellipse 80% 90% at 100% 0%,rgba(200,176,255,.20),transparent 60%),linear-gradient(135deg,rgba(45,35,84,.55),rgba(26,20,52,.45))}
  .c-planets{background:url(planet-ringed.svg) right 14px top 122px/160px auto no-repeat,url(planet-moon.svg) left 22px top 140px/44px auto no-repeat,url(planet-blue.svg) left -45px top 62%/130px auto no-repeat,url(planet-red.svg) right -14px bottom 8%/86px auto no-repeat}
  header.site{background:rgba(14,10,30,.74);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}
  .c-glyphs{opacity:.34}
  .c-wheel{opacity:.28}
  .hero{padding:22px 16px}
  .hero::after{width:180px;height:180px;margin-top:-90px;right:-60px}
}

/* ===== 中英對照 Bilingual ===== */
.en{display:block;font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Noto Serif",serif;
  font-size:.88em;line-height:1.6;color:#aebfdc;margin:.25em 0 .1em;letter-spacing:0}
.en strong{color:#d6e0f2}
.en em{color:#c9d6ee}
h1 .en-h,h2 .en-h,h3 .en-h{font-size:.62em;font-weight:400;color:#9fb3d6;margin:.15em 0 0;letter-spacing:.02em}
h2 .en-h{font-size:.66em}
h3 .en-h{font-size:.78em}
td .en,th .en{font-size:.84em;margin:.1em 0 0}
th .en{color:#e8dcb8;font-weight:400}
.toc li .en{display:inline;font-size:.85em;margin:0 0 0 .5em;color:#9fb3d6}
.toc li .en::before{content:"· "}
.refs .en{font-size:.92em}
blockquote .en{font-style:italic}
.brand-en{display:block;font-size:.62rem;font-weight:400;color:#b8c4e0;letter-spacing:.04em;line-height:1.3;white-space:normal}
nav.main a{line-height:1.25;text-align:center}
.nav-en{display:block;font-family:Georgia,"Noto Serif",serif;font-size:.68em;color:#a9b6d4;letter-spacing:.02em}
nav.main a[aria-current="page"] .nav-en{color:#efd68f}
.sign dd .en,.sign dt .en{font-size:.85em;margin:0}
@media (max-width:600px){
  header.site .brand{font-size:1rem;white-space:normal}
  nav.main ul{display:grid;grid-template-columns:repeat(4,1fr);gap:3px}
  nav.main a{padding:3px 2px;font-size:.8rem;white-space:normal;word-break:keep-all}
  .nav-en{font-size:.66rem;line-height:1.15}
  main{margin-top:40px}
  .toc li .en{display:block;margin:0}
  .toc li .en::before{content:""}
}

/* ===== 即時閱覽人數 Live readers ===== */
.online-badge{display:inline-flex;align-items:center;gap:.45em;margin-top:.6em;padding:4px 12px;border-radius:999px;
  background:rgba(20,40,30,.55);border:1px solid rgba(120,220,160,.45);color:#d8f5e4;font-size:.9rem;line-height:1.5}
.online-badge[hidden]{display:none}
.online-badge b{color:#fff;font-variant-numeric:tabular-nums}
.online-en{font-family:Georgia,"Noto Serif",serif;color:#b9e6cc;font-size:.92em}
.online-dot{width:9px;height:9px;border-radius:50%;background:#5be38f;box-shadow:0 0 0 0 rgba(91,227,143,.7);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(91,227,143,.6)}70%{box-shadow:0 0 0 8px rgba(91,227,143,0)}100%{box-shadow:0 0 0 0 rgba(91,227,143,0)}}
@media (prefers-reduced-motion:reduce){.online-dot{animation:none}}