:root{color-scheme:dark;--bg:#0d1518;--panel:#142126;--line:#d7dbc622;--paper:#ece6d2;--muted:#9aada7;--accent:#c5dc9b;--red:#ae3c32}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 20% 0,#24383166,transparent 60%),var(--bg);color:var(--paper);font:14px system-ui,-apple-system,'Microsoft YaHei',sans-serif;min-height:100dvh}a{color:inherit;text-decoration:none}button,select{font:inherit}button{cursor:pointer;color:inherit;background:transparent;border:1px solid var(--line);border-radius:7px;padding:12px 16px;transition:background .18s,border-color .18s}button:hover:not(:disabled){background:#d5dfc313;border-color:#c8d7b577}button:active:not(:disabled){transform:translateY(1px)}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:3px}header{max-width:1260px;margin:auto;height:84px;display:flex;justify-content:space-between;align-items:center;padding:0 30px;border-bottom:1px solid var(--line)}.brand{font-weight:900;letter-spacing:3px}.brand span{color:var(--accent)}.nav{display:flex;align-items:center;gap:22px;font-size:12px;color:var(--muted)}.nav a:hover{color:var(--paper)}.nav button{padding:7px 11px;font-size:12px}.layout{max-width:1260px;margin:auto;padding:32px 30px 26px;display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:40px;align-items:start}.board-section{min-width:0}.board-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-size:11px;letter-spacing:2px;color:var(--muted)}.board-heading strong{color:var(--paper);font-size:12px;letter-spacing:1px}.turn-chip{display:inline-flex;align-items:center;gap:7px}.turn-chip:before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent)}.turn-chip.thinking:before{animation:pulse 1s infinite}.board-frame{padding:23px;background:linear-gradient(135deg,#b99865,#806341);border-radius:9px;box-shadow:0 22px 65px #0006,inset 0 1px 0 #ffe0ad66;border:1px solid #d2b27e55;position:relative}.board-frame:after{content:'';position:absolute;inset:8px;border:1px solid #50372250;border-radius:4px;pointer-events:none}.board{width:100%;aspect-ratio:1;position:relative;display:grid;grid-template-columns:repeat(15,minmax(0,1fr));grid-template-rows:repeat(15,minmax(0,1fr));background:repeating-linear-gradient(1deg,#674b2510 0 1px,transparent 1px 8px),linear-gradient(130deg,#e5ca92,#d5b17a);border-radius:2px;color:#573b24;touch-action:manipulation;isolation:isolate}.board.chess{aspect-ratio:9/10;grid-template-columns:repeat(9,minmax(0,1fr));grid-template-rows:repeat(10,minmax(0,1fr))}.board svg{position:absolute;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none}.cell{position:relative;display:flex;align-items:center;justify-content:center;border:0;border-radius:0;padding:0;min-width:0;min-height:0;aspect-ratio:unset;outline-offset:-2px!important;color:#513a28}.cell:hover:not(:disabled){background:#ffffff1c;border:0}.cell:active:not(:disabled){transform:none}.cell.selected{background:#e8edc452;box-shadow:inset 0 0 0 2px #53714c}.cell.legal:after{content:'';position:absolute;width:18%;height:18%;background:#476a43b3;border-radius:50%;box-shadow:0 0 0 4px #e7f2b940;z-index:3}.cell.legal.occupied:after{width:89%;height:89%;background:transparent;border:2px solid #507040;box-shadow:none}.stone{width:84%;height:84%;border-radius:50%;position:relative;box-shadow:1px 3px 4px #3b2d3266,inset 0 -3px 5px #0005;animation:place .2s ease-out}.stone.black{background:radial-gradient(circle at 33% 25%,#596364,#161e20 55%,#070a0c)}.stone.white{background:radial-gradient(circle at 30% 25%,#fffef2,#e2e4dc 65%,#a7aaa1)}.cell.last .stone:after{content:'';position:absolute;width:19%;height:19%;left:40.5%;top:40.5%;border-radius:50%;background:#ff9b70;box-shadow:0 0 0 1px #0003}.cell.winning .stone{box-shadow:0 0 0 2px #bb5134,0 0 14px #fff0b0}.piece{width:88%;height:88%;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'Noto Serif CJK SC','Songti SC',SimSun,serif;font-weight:800;font-size:clamp(18px,3vw,37px);background:radial-gradient(circle at 35% 20%,#f6e2b9,#dcb77e 75%,#bb925b);color:#b63830;border:1px solid #ac7d48;box-shadow:0 3px 0 #88633b,0 4px 5px #59352066,inset 0 0 0 3px #ecd19e,inset 0 0 0 4px #a55b4166;animation:place .22s ease-out;line-height:1;z-index:1}.piece.black{color:#29373a;box-shadow:0 3px 0 #88633b,0 4px 5px #59352066,inset 0 0 0 3px #ecd19e,inset 0 0 0 4px #34494b66}.cell.last .piece{outline:2px solid #658251;outline-offset:1px}.cell.origin{background:#f5eab84a}.cell.checked .piece{outline:3px solid #cb4637;animation:checkpulse 1.1s infinite}.board-foot{margin-top:18px;color:var(--muted);display:flex;justify-content:space-between;gap:20px;font-size:11px;line-height:1.7}.board-foot span:last-child{text-align:right}.eyebrow{font-size:10px;letter-spacing:3px;color:var(--accent);margin-bottom:14px}.title{font-size:43px;letter-spacing:-2px;margin:0 0 10px;font-weight:850}.intro{font-size:12px;color:var(--muted);line-height:1.9;margin:0 0 25px}.status-panel{padding:20px;background:linear-gradient(135deg,#23382e,#18292b);border:1px solid #cee3b122;border-left:3px solid var(--accent);border-radius:0 8px 8px 0;min-height:96px;margin-bottom:22px}.status-title{font-size:19px;font-weight:750;margin-bottom:8px}.status-desc{font-size:12px;color:#b1c4b8;line-height:1.7}.status-panel.ended{background:linear-gradient(130deg,#384332,#1e302f)}.options{border-top:1px solid var(--line)}.option{padding:15px 0;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);font-size:12px}.option select{border:1px solid var(--line);color:var(--paper);background:#142329;padding:8px 10px;border-radius:5px;max-width:180px}.option select:disabled{opacity:.45}.primary{background:var(--accent);color:#19271e;border-color:var(--accent);font-weight:800;width:100%;margin-top:20px;display:flex;justify-content:space-between;align-items:center}.primary:hover:not(:disabled){background:#d5eab4;border-color:#d5eab4}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.actions button{font-size:12px}.record{margin-top:26px}.section-label{display:flex;justify-content:space-between;align-items:center;font-size:10px;letter-spacing:2px;color:var(--muted);padding-bottom:12px;border-bottom:1px solid var(--line)}.moves{max-height:143px;overflow:auto;margin:0;padding:0;list-style:none;scrollbar-width:thin}.moves li{display:grid;grid-template-columns:28px 1fr 1fr;gap:10px;padding:11px 0;border-bottom:1px solid #dfebc70d;font:12px ui-monospace,monospace;color:#bbc8bb}.moves li span:first-child{color:#69827b}.empty{color:#69827b;font-size:12px;padding:18px 0}.tiny{font-size:11px;color:#6f8982;line-height:1.9;margin-top:20px}.toast{min-height:30px;font-size:12px;color:#e5ca94;line-height:1.7;margin-top:12px}footer{max-width:1200px;margin:0 auto;padding:18px 0 28px;border-top:1px solid var(--line);font-size:10px;color:#6e8780;letter-spacing:1px;display:flex;justify-content:space-between;gap:15px}dialog{background:#142127;color:var(--paper);border:1px solid #b9ccb344;border-radius:12px;padding:28px;width:min(480px,90vw);max-height:85dvh;overflow:auto;box-shadow:0 25px 120px #0009}dialog::backdrop{background:#071012c9;backdrop-filter:blur(8px)}dialog h2{font-size:25px;margin:0 0 18px}dialog p{font-size:13px;line-height:1.95;color:#b4c1b7}dialog .actions{margin-top:20px}dialog button{font-size:13px}dialog button.accent{background:var(--accent);color:#18281e}.help-close{width:100%;margin-top:15px}.legend{display:flex;gap:12px;margin:18px 0;font-size:12px;color:#a8baad}.legend i{width:14px;height:14px;border-radius:50%;display:inline-block;background:#111b1c;vertical-align:-2px;margin-right:5px}.legend i.white{background:#e4e6dc}.legend .red{background:#bd4938}@keyframes place{from{opacity:.3;transform:translateY(-5px) scale(1.12)}to{opacity:1;transform:none}}@keyframes pulse{50%{opacity:.25}}@keyframes checkpulse{50%{outline-color:#ffb57b}}@media(min-width:1100px){.layout{grid-template-columns:minmax(0,700px) 330px;gap:50px}.board-frame{padding:27px}}@media(max-width:900px){.layout{grid-template-columns:minmax(0,1fr) 285px;gap:24px;padding:25px 22px}.board-frame{padding:16px}.title{font-size:35px}.piece{font-size:clamp(16px,3vw,28px)}header{padding:0 22px}footer{margin:0 22px}.board-heading{letter-spacing:1px;font-size:10px}.intro{margin-bottom:18px}}@media(max-width:700px){header{height:65px;padding:0 18px}.nav{gap:14px}.nav .other{display:none}.layout{display:flex;flex-direction:column;padding:21px 16px;gap:24px}.board-section{width:100%;max-width:560px;margin:auto}.sidebar{width:100%;display:grid;grid-template-columns:1fr 1fr;column-gap:20px}.sidebar .heading,.status-panel,.record,.tiny,.toast{grid-column:1/-1}.heading .title{font-size:29px;display:inline-block;margin-right:15px;letter-spacing:0}.heading .eyebrow{margin-bottom:8px}.heading .intro{display:inline;font-size:11px}.status-panel{margin:15px 0;padding:14px;min-height:75px}.status-title{font-size:17px}.options{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:16px;border:0}.option{padding:10px 0;flex-direction:column;align-items:stretch;gap:8px}.option select{max-width:none;width:100%}.primary{margin-top:16px}.actions{margin-top:16px}.record{margin-top:15px}.tiny{margin-top:12px}.piece{font-size:clamp(18px,6vw,32px)}.board-frame{padding:16px}.board-foot{margin-top:12px}.board-heading{margin-bottom:12px}.moves{max-height:105px}.toast{min-height:0;margin-top:8px}.board-foot .desktop-hint{display:none}footer{font-size:9px;margin:0 16px}.legend{margin:12px 0}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}
@media(min-width:701px){body[data-game=xiangqi] .board-section{max-width:min(100%,calc((100dvh - 230px)*.9 + 48px))}body[data-game=gomoku] .board-section{max-width:min(100%,calc(100dvh - 180px))}}
.mobile-start{display:none}@media(max-width:700px){.mobile-start{display:block;background:var(--accent);color:#1a2b21;font-size:11px;padding:7px 10px;font-weight:750}.mobile-start[hidden]{display:none}.mobile-start:not([hidden])+.turn-chip{display:none}.actions button{padding-left:7px;padding-right:7px;font-size:11px}}