:root{
  --bg:#f4f0e6; --card:#fffdf8; --line:#e3d9c3; --ink:#2c332f; --muted:#8b8577;
  --red:#b23b2e; --red-soft:#f6e3df; --black:#3c4741; --gold:#c8a256;
  --wood:#efd7a5; --wood-deep:#d9b877; --shadow:0 8px 26px rgba(80,64,36,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  min-height:100vh;color:var(--ink);background:
    radial-gradient(circle at 12% 8%,rgba(200,162,86,.13),transparent 42%),
    radial-gradient(circle at 88% 92%,rgba(178,59,46,.08),transparent 45%),
    var(--bg);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
}
.page{max-width:1180px;margin:0 auto;padding:26px 22px 18px}

/* ── 顶部 ── */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}
.brand{display:flex;align-items:center;gap:14px}
.seal{
  width:50px;height:50px;display:grid;place-items:center;border-radius:8px;
  background:var(--red);color:#fff8ec;font-family:"KaiTi","STKaiti",serif;font-size:30px;
  box-shadow:0 4px 12px rgba(178,59,46,.28);letter-spacing:0
}
.brand-text h1{font-family:"Songti SC","STSong","Noto Serif SC",serif;font-size:27px;letter-spacing:5px;font-weight:700}
.brand-text p{font-size:12px;color:var(--muted);letter-spacing:2px;margin-top:3px}
.top-note{font-size:12px;color:var(--muted);letter-spacing:1px;border:1px solid var(--line);padding:8px 14px;border-radius:20px;background:rgba(255,253,248,.7)}

/* ── 布局 ── */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px;align-items:start}
.board-panel{min-width:0;display:flex;flex-direction:column;align-items:center;gap:12px}
.rail{width:100%;max-width:592px;display:flex;align-items:center;gap:12px;min-height:42px}
.rail.bottom{justify-content:space-between}
.player-tag{display:flex;align-items:center;gap:10px;padding:7px 12px;border:1px solid var(--line);border-radius:10px;background:var(--card);box-shadow:0 2px 8px rgba(80,64,36,.05)}
.side-badge{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-family:"KaiTi","STKaiti",serif;font-size:16px;color:#fff}
.player-tag.black .side-badge{background:var(--black)}
.player-tag.red .side-badge{background:var(--red)}
.tag-main{display:flex;flex-direction:column;line-height:1.25}
.tag-main strong{font-size:13px}
.tag-main span{font-size:11px;color:var(--muted)}
.thinking{display:none;font-size:11px;color:var(--red);animation:blink 1.1s infinite}
.thinking.show{display:inline}
@keyframes blink{50%{opacity:.35}}
.captured{flex:1;display:flex;gap:3px;flex-wrap:wrap;font-family:"KaiTi","STKaiti",serif;font-size:13px;min-height:20px}
.captured i{font-style:normal;width:20px;height:20px;display:grid;place-items:center;border-radius:50%;border:1px solid #d8cbb0;background:#fbf4e3;color:var(--black)}
.captured i.red{color:var(--red);border-color:#e4bdb5;background:#fdf0ed}

/* ── 棋盘 ── */
.board-frame{
  position:relative;width:100%;max-width:592px;padding:14px;border-radius:10px;
  background:linear-gradient(145deg,#e6c98e,#cfaa69 55%,#c69c5a);
  box-shadow:inset 0 0 0 2px rgba(255,248,225,.45),inset 0 0 0 8px rgba(120,84,36,.14),0 12px 32px rgba(88,66,30,.24);
}
.board-frame::after{content:"";position:absolute;inset:7px;border:1px solid rgba(255,246,220,.55);border-radius:5px;pointer-events:none}
#board{display:block;width:100%;height:auto;border-radius:3px;background:var(--wood);touch-action:manipulation;cursor:pointer}
.overlay{position:absolute;inset:0;display:grid;place-items:center;background:rgba(35,30,22,.44);border-radius:10px;z-index:5;backdrop-filter:blur(2px)}
.overlay.hidden{display:none}
.result-card{width:min(84%,300px);padding:26px 22px;text-align:center;background:var(--card);border-radius:14px;box-shadow:0 18px 48px rgba(0,0,0,.25);border:1px solid rgba(255,255,255,.6)}
.result-seal{width:52px;height:52px;margin:0 auto 12px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:#fff;font-family:"KaiTi","STKaiti",serif;font-size:30px;box-shadow:0 6px 16px rgba(178,59,46,.3)}
.result-card h2{font-family:"Songti SC","STSong",serif;font-size:25px;letter-spacing:3px;margin-bottom:6px}
.result-card p{font-size:13px;color:var(--muted);margin-bottom:20px}
.result-card .btn{width:100%;margin-top:8px}

/* ── 侧栏 ── */
.side{display:flex;flex-direction:column;gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:var(--shadow)}
.card h2{font-size:13px;letter-spacing:2px;color:var(--ink);margin-bottom:12px;font-weight:700}
.card-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:10px}
.card-head h2{margin:0}
.card-head span{font-size:11px;color:var(--muted)}
.status-card{border-left:3px solid var(--red)}
.status-line{display:flex;align-items:center;gap:9px;font-size:16px}
.turn-dot{width:11px;height:11px;border-radius:50%;background:var(--red);box-shadow:0 0 0 4px var(--red-soft);transition:.25s}
.turn-dot.black{background:var(--black);box-shadow:0 0 0 4px #e6eae6}
.hint{font-size:12px;color:var(--muted);margin-top:8px;line-height:1.6;min-height:19px}
.field{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:11px}
.field>label{font-size:12px;color:var(--muted);white-space:nowrap}
.seg{display:flex;gap:3px;padding:3px;background:#f3eee2;border-radius:8px}
.seg button{border:0;background:transparent;color:#7a7262;font-size:12px;padding:6px 10px;border-radius:6px;cursor:pointer;transition:.18s;white-space:nowrap}
.seg button:hover{color:var(--ink)}
.seg button.on{background:var(--card);color:var(--red);font-weight:700;box-shadow:0 1px 5px rgba(80,64,36,.14)}
.switch-field{margin-bottom:4px}
.switch{width:40px;height:22px;border:0;border-radius:12px;background:#d8d1c1;position:relative;cursor:pointer;transition:.2s}
.switch span{position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.2)}
.switch.on{background:var(--red)}
.switch.on span{left:21px}
.field-note{font-size:11px;color:#a8a08e;margin-top:8px}
.move-list{list-style:none;max-height:172px;overflow-y:auto;font-size:12px}
.move-list li{display:grid;grid-template-columns:26px 1fr 1fr;gap:6px;padding:5px 6px;border-bottom:1px dashed #eee6d4;align-items:center}
.move-list li:last-child{border-bottom:0}
.move-list li .no{color:#b5ac98;font-size:11px}
.move-list li .r{color:var(--red)}
.move-list li .b{color:var(--black)}
.move-list li.empty{display:block;color:#b5ac98;text-align:center;padding:14px 0}
.move-list::-webkit-scrollbar{width:5px}
.move-list::-webkit-scrollbar-thumb{background:#ddd2ba;border-radius:3px}
.action-card{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:12px}
.btn{border:1px solid var(--line);background:#fbf7ed;color:var(--ink);font-size:13px;padding:10px 8px;border-radius:8px;cursor:pointer;transition:.18s;font-family:inherit}
.btn:hover{background:#f3ead6;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}
.btn.primary:hover{background:#9e3327}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn.danger{color:var(--red);border-color:#ecd2cd}
.rules summary{font-size:13px;cursor:pointer;letter-spacing:2px;font-weight:700;list-style:none}
.rules summary::-webkit-details-marker{display:none}
.rules summary::before{content:"▸ ";color:var(--red)}
.rules[open] summary::before{content:"▾ "}
.rules ul{margin:12px 0 0 16px;font-size:12px;color:#6f6a5d;line-height:1.9}
kbd{background:#f1ead9;border:1px solid #e0d5bd;border-radius:4px;padding:0 4px;font-size:11px}
.foot{text-align:center;font-size:11px;color:#a49c89;letter-spacing:1px;margin-top:22px}

@media (max-width:960px){
  .layout{grid-template-columns:1fr}
  .board-panel{order:1}
  .side{order:2;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
  .status-card,.action-card{grid-column:span 2}
  .top-note{display:none}
}
@media (max-width:560px){
  .page{padding:16px 12px}
  .brand-text h1{font-size:22px;letter-spacing:3px}
  .seal{width:42px;height:42px;font-size:25px}
  .side{grid-template-columns:1fr}
  .status-card,.action-card{grid-column:span 1}
  .board-frame{padding:9px}
  .rail{max-width:100%}
  .tag-main span{display:none}
}