:root{
  --bg:#120d0c;--bg2:#1a1311;--card:#221815;--card2:#2a1e1a;--line:#3d2d27;
  --text:#f0e6d6;--muted:#b9a88f;--gold:#d6b25e;--gold-d:#a8852f;--red:#b3322d;--red-d:#7a1f1f;
  --ok:#6fbf73;--bad:#e5645e;--paper:#f3ead7;--ink:#1d1a17;
  --font:"PingFang TC","Noto Sans TC","Microsoft JhengHei","Heiti TC",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:radial-gradient(1200px 600px at 50% -10%,#2a1511 0%,var(--bg) 60%) fixed,var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.7;min-height:100vh}
.wrap{max-width:720px;margin:0 auto;padding:16px 16px calc(48px + env(safe-area-inset-bottom))}
h1,h2,h3{line-height:1.35;margin:0}
a{color:var(--gold)}
button{font:inherit;color:inherit;cursor:pointer}
.sr{position:absolute;left:-9999px}
/* header */
.brand{font-size:12px;letter-spacing:.3em;color:var(--gold);margin:8px 0 4px}
.title{font-size:34px;font-weight:800;color:var(--text);letter-spacing:.08em}
.title b{color:var(--gold)}
.sub{color:var(--muted);margin:2px 0 14px}
.topbar{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.back{background:none;border:1px solid var(--line);border-radius:999px;padding:6px 14px;color:var(--muted);text-decoration:none;font-size:14px}
.back:hover{border-color:var(--gold);color:var(--gold)}
/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin:12px 0}
.card h2{font-size:18px;color:var(--gold);margin-bottom:8px}
.card.flat{background:transparent}
.sec{margin:26px 0 8px;font-size:14px;letter-spacing:.2em;color:var(--gold);border-bottom:1px solid var(--line);padding-bottom:6px}
.sec small{letter-spacing:0;color:var(--muted);margin-left:8px}
.stat{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:14px}
.stat b{color:var(--text)}
.bar{height:6px;background:var(--line);border-radius:6px;overflow:hidden;margin:10px 0 4px}
.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--red),var(--gold));width:0}
label.fld{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
input[type=text]{width:100%;background:var(--bg2);border:1px solid var(--line);border-radius:10px;color:var(--text);font:inherit;padding:10px 12px}
input[type=text]:focus{outline:2px solid var(--gold-d);outline-offset:1px}
/* case list */
.case{display:flex;gap:12px;align-items:center;width:100%;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin:8px 0;text-decoration:none;color:inherit}
.case:hover,.case:focus-visible{border-color:var(--gold)}
.case .no{flex:0 0 auto;min-width:54px;font-size:12px;color:var(--gold);letter-spacing:.1em;text-align:center;border:1px solid var(--gold-d);border-radius:8px;padding:3px 6px}
.case .nm{flex:1;min-width:0}
.case .nm b{display:block;font-size:16px}
.case .nm span{font-size:12.5px;color:var(--muted)}
.chip{display:inline-block;font-size:12px;border-radius:999px;padding:2px 10px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.chip.ok{color:var(--ok);border-color:#3f6e42}
.chip.go{color:var(--gold);border-color:var(--gold-d)}
.chip.lock{color:var(--muted)}
.stars{color:var(--gold);letter-spacing:2px}
.slots{display:flex;gap:10px;margin:10px 0}
.slot{width:54px;height:54px;border-radius:10px;border:1px dashed var(--gold-d);display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--gold);background:var(--bg2)}
.slot.on{border-style:solid;background:linear-gradient(160deg,#3a2316,#2a1511)}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:10px;border:1px solid var(--gold-d);background:transparent;color:var(--gold);padding:10px 16px;font-weight:600;min-height:44px;text-decoration:none}
.btn:hover{background:#2a1e12}
.btn.pri{background:linear-gradient(180deg,var(--red),var(--red-d));border-color:var(--red);color:#fff}
.btn.pri:hover{filter:brightness(1.1)}
.btn.ghost{border-color:var(--line);color:var(--muted);font-weight:400}
.btn.sm{min-height:36px;padding:6px 12px;font-size:14px}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.row{display:flex;flex-wrap:wrap;gap:10px;margin:12px 0}
/* case view */
.hero .lbl{font-size:13px;color:var(--gold);letter-spacing:.25em}
.hero h1{font-size:28px;margin:2px 0 8px}
.meta{display:flex;flex-wrap:wrap;gap:6px 10px;margin:6px 0}
.intro{font-size:16px}
.intro blockquote,.intro p{margin:.6em 0}
/* envelopes */
.env{position:relative;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin:14px 0;overflow:hidden}
.env.locked{opacity:.55}
.env .hd{display:flex;justify-content:space-between;align-items:center;gap:8px}
.env h3{font-size:17px;color:var(--gold)}
.env .count{font-size:13px;color:var(--muted)}
.seal{position:relative;height:96px;margin:12px 0 4px;perspective:600px}
.seal .back-pane{position:absolute;inset:18px 0 0 0;background:linear-gradient(180deg,#e8d9b5,#d3bd8c);border-radius:6px 6px 10px 10px;box-shadow:0 8px 20px #0007}
.seal .letter{position:absolute;left:12px;right:12px;top:26px;height:60px;background:var(--paper);border-radius:4px;transition:transform .6s ease .15s}
.seal .flap{position:absolute;left:0;right:0;top:18px;height:50px;background:linear-gradient(180deg,#c9b17c,#b69a5c);clip-path:polygon(0 0,100% 0,50% 100%);transform-origin:50% 0;transition:transform .6s ease;z-index:3}
.seal .wax{position:absolute;left:50%;top:50px;width:26px;height:26px;margin-left:-13px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#d24b43,var(--red-d));z-index:4;box-shadow:0 2px 4px #0008;transition:opacity .3s}
.seal .front{position:absolute;inset:44px 0 0 0;background:linear-gradient(180deg,#dcc99b,#c7ae78);clip-path:polygon(0 0,50% 40%,100% 0,100% 100%,0 100%);border-radius:0 0 10px 10px;z-index:2}
.env.opening .flap{transform:rotateX(180deg);z-index:1}
.env.opening .wax{opacity:0}
.env.opening .letter{transform:translateY(-34px)}
.docs{display:grid;gap:8px;margin-top:12px;animation:rise .5s ease both}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.doc{display:flex;gap:10px;align-items:center;width:100%;text-align:left;background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.doc:hover,.doc:focus-visible{border-color:var(--gold)}
.doc .n{flex:0 0 auto;font-size:12px;color:var(--gold);border:1px solid var(--gold-d);border-radius:6px;padding:1px 7px;min-width:48px;text-align:center}
.doc .t{flex:1;min-width:0}
.doc .read{font-size:12px;color:var(--ok)}
.doc.lockd{border-style:dashed;color:var(--muted);cursor:default}
.doc .snd{font-size:12px;color:var(--gold)}
/* viewer & sheets */
.overlay{position:fixed;inset:0;z-index:50;background:rgba(8,5,4,.82);display:flex;align-items:flex-end;justify-content:center;animation:fade .2s ease both}
@keyframes fade{from{opacity:0}to{opacity:1}}
.sheet{width:100%;max-width:720px;max-height:94vh;max-height:94dvh;background:var(--bg2);border:1px solid var(--line);border-bottom:0;border-radius:18px 18px 0 0;display:flex;flex-direction:column;animation:up .25s ease both}
@keyframes up{from{transform:translateY(24px);opacity:.6}to{transform:none;opacity:1}}
.sheet .sh{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.sheet .sh h2{flex:1;font-size:17px;color:var(--gold)}
.sheet .sb{padding:14px 16px;overflow:auto;-webkit-overflow-scrolling:touch}
.sheet .sf{display:flex;gap:10px;padding:12px 16px calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line)}
.sheet .sf .btn{flex:1}
.x{background:none;border:1px solid var(--line);border-radius:999px;width:38px;height:38px;color:var(--muted);font-size:18px}
.paper{background:var(--paper);color:var(--ink);border-radius:10px;padding:14px 16px;font-size:16px;line-height:1.85}
.paper h1,.paper h2,.paper h3{color:#7a1f1f;margin:.8em 0 .3em;font-size:18px}
.paper table{border-collapse:collapse;width:100%;margin:10px 0;font-size:14.5px;display:block;overflow-x:auto}
.paper td,.paper th{border:1px solid #b9a98f;padding:5px 8px;vertical-align:top;white-space:nowrap}
.paper td:last-child{white-space:normal;min-width:6em}
.paper th{background:#eadcbc}
.paper blockquote{margin:10px 0;padding:6px 12px;background:#e9dec2;border-left:4px solid #c9a24b}
.paper blockquote p{margin:.3em 0}
.paper ul,.paper ol{padding-left:1.3em}
.paper p{margin:.5em 0}
.paper hr{border:0;border-top:1px dashed #b9a98f}
.paper details{margin:10px 0;background:#e9dec2;border-radius:8px;padding:8px 12px}
.paper summary{cursor:pointer;font-weight:700;color:#7a1f1f}
.paper audio{width:100%;margin:6px 0}
.audbox{background:#2a1e1a;color:var(--text);border-radius:10px;padding:10px 12px;margin-bottom:10px}
.audbox small{color:var(--muted)}
.audbox audio{width:100%;margin-top:6px}
/* hints */
.hint{border-left:3px solid var(--gold);padding:6px 12px;margin:8px 0;background:var(--bg2);border-radius:0 8px 8px 0}
.hint b{color:var(--gold)}
/* accuse */
.q{margin:16px 0}
.q h3{font-size:16px;color:var(--gold);margin-bottom:6px}
.opts{display:grid;gap:8px}
.opts.cols{grid-template-columns:1fr 1fr}
.opt{display:block;position:relative}
.opt input{position:absolute;opacity:0}
.opt span{display:block;padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:var(--card);font-size:15px;line-height:1.5}
.opt input:checked+span{border-color:var(--gold);background:#3a2a16;box-shadow:0 0 0 1px var(--gold) inset}
.opt input:focus-visible+span{outline:2px solid var(--gold)}
.res{display:grid;gap:6px;margin:12px 0}
.res div{border-radius:10px;padding:8px 12px;border:1px solid var(--line);background:var(--card)}
.res .y{border-color:#3f6e42;color:var(--ok)}
.res .n{border-color:#7a3b37;color:var(--bad)}
.note{color:var(--muted);font-size:13.5px}
.good{color:var(--ok)}
.bad{color:var(--bad)}
.frag{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--gold);border-radius:12px;padding:6px 14px;margin:6px 0;background:#2a1b10}
.frag b{font-size:30px;color:var(--gold)}
/* duel */
.duel{border-color:var(--gold-d);background:linear-gradient(180deg,#2a1b13,var(--card))}
.score{display:flex;align-items:center;justify-content:center;gap:18px;font-size:30px;font-weight:800;margin:8px 0}
.score small{display:block;font-size:12px;color:var(--muted);font-weight:400;text-align:center}
.lnk{display:flex;gap:8px;margin:8px 0}
.lnk input{flex:1;min-width:0;font-size:13px}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#000c;color:#fff;border:1px solid var(--gold-d);padding:8px 16px;border-radius:999px;z-index:90;font-size:14px}
footer.ft{margin-top:30px;color:var(--muted);font-size:12.5px;text-align:center}
footer.ft button{background:none;border:0;color:var(--muted);text-decoration:underline;font-size:12.5px}
@media (min-width:600px){.overlay{align-items:center}.sheet{border-radius:18px;border-bottom:1px solid var(--line)}}
@media (max-width:420px){.opts.cols{grid-template-columns:1fr}.title{font-size:30px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}