:root{font-family:Inter,"Microsoft YaHei","PingFang SC",sans-serif;color:#243334;background:#f2f4f3;font-size:16px;--green:#285f54;--muted:#788481;--line:#e3e8e5}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,svg:focus-visible{outline:3px solid #6ca696;outline-offset:3px}header{height:84px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(28px,calc((100vw - 1240px)/2))}.brand{text-decoration:none;color:#223f38;font:700 32px Georgia,serif;letter-spacing:-1px;display:flex;align-items:center}.brand-dot{color:#b3915f}.brand-divider{width:1px;height:23px;background:#d7dfdc;margin:0 21px}.brand-game{font:600 19px "Microsoft YaHei",sans-serif;letter-spacing:3px}nav{display:flex;align-items:center;gap:28px}nav #identity{font-size:14px;color:var(--muted);padding-left:25px;border-left:1px solid var(--line)}main{max-width:1240px;margin:0 auto;padding:34px 28px 0}.page-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}.eyebrow{font-size:12px;color:#76867f;letter-spacing:2px;font-weight:600}h1{font-size:25px;font-weight:500;letter-spacing:2px;margin:9px 0 0}.mode-badge{font-size:14px;border:1px solid #d9e1db;background:#e9eee9;padding:9px 15px;border-radius:4px;color:#566b60}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 335px;gap:28px;align-items:start}.board-section{min-width:0}.board-toolbar{display:flex;align-items:center;justify-content:space-between;padding:0 2px 16px;font-size:14px;color:#53635e}.dot{display:inline-block;background:#9daaa3;width:7px;height:7px;border-radius:50%;margin-right:8px}.dot.live{background:#43806c}#roundLabel{font-variant-numeric:tabular-nums;color:#344b41}.board-wrap{padding:15px;background:#ae8250;border-radius:5px;box-shadow:0 12px 32px #533c1b1c,inset 0 1px 1px #e7cea6;background:linear-gradient(135deg,#cca36c,#a8804f)}#board{display:block;width:100%;aspect-ratio:1;background:#dcbc83;box-shadow:0 0 0 1px #795a30,0 2px 5px #68461b66;touch-action:manipulation;border-radius:2px}.grid-line{stroke:#695431;stroke-width:1;opacity:.72}.board-caption{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:#829087;padding:20px 0}.board-caption>span{display:flex;align-items:center;gap:7px}.legend-stone{width:10px;height:10px;border-radius:50%;background:#34413e}.legend-void{font-size:20px;color:#6c654f}aside{display:flex;flex-direction:column;gap:16px}.panel{background:#fff;border:1px solid var(--line);border-radius:7px;padding:22px}.panel-top{display:flex;align-items:center;justify-content:space-between;gap:8px}h2{font-size:17px;margin:0;font-weight:600}.mini-label{font-size:12px;color:#7e8b85}.muted{font-size:14px;color:#77867f;line-height:1.7;margin:12px 0 20px}label{display:block;font-size:13px;color:#5e6f65;margin:14px 0 8px}input{width:100%;border:1px solid #dce2de;border-radius:4px;padding:11px 12px;background:#fafbf9;color:#263d33;font-size:15px}.input-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.hint{font-size:12px;line-height:1.8;color:#7d8b82;margin:12px 0 0}.primary,.secondary{border-radius:4px;min-height:44px;padding:12px 16px;font-size:14px;font-weight:600}.primary{background:var(--green);color:#fff;border:1px solid var(--green)}.primary:hover:not(:disabled){background:#1e4e44}.secondary{background:#fff;color:#4a6257;border:1px solid #d8e0da}.secondary:hover:not(:disabled){background:#f0f4f1}.wide{width:100%;margin-top:12px}.primary span{float:right}.text-button{background:none;border:0;padding:8px 0;color:#52665b;font-size:14px}.danger{color:#a1685d;margin-top:12px;width:100%;font-size:12px}.action-panel{border-top:3px solid #b89a6b}#instruction{font-size:14px;line-height:1.9;color:#748178;margin:16px 0}.selection{background:#f4f6f3;border-radius:4px;padding:12px 14px;color:#5d7163;font-size:14px;min-height:43px}.notes{padding:2px 8px}.notes h3{font-size:13px;margin:0 0 9px;color:#617668}.notes p{font-size:13px;line-height:1.8;color:#839087;margin:0}.player{display:flex;align-items:center;gap:12px;margin-top:20px}.player-stone{width:33px;height:33px;border-radius:50%;flex:none;box-shadow:0 2px 4px #0003;background:radial-gradient(circle at 35% 25%,#657071,#1c2224 60%,#111)}.player-stone.white{background:radial-gradient(circle at 35% 25%,#fff,#f3f1e9 65%,#c7c6bf);border:1px solid #dedfd9}.player-name{font-size:15px;overflow-wrap:anywhere}.player-state{font-size:12px;color:#859288;margin-top:4px}.you-tag{font-size:11px;background:#edf3ee;color:#668270;padding:2px 5px;margin-left:6px}.room-options{margin-top:20px;padding-top:15px;border-top:1px solid var(--line);font-size:12px;color:#76847b;line-height:1.8}.score-row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}.score-row strong{font-size:22px}.hidden{display:none!important}footer{display:flex;justify-content:space-between;border-top:1px solid #dfe5e0;margin-top:25px;padding:21px 0;font-size:12px;color:#95a097;letter-spacing:1px}#toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);background:#233f36;color:white;padding:13px 22px;border-radius:6px;max-width:90vw;font-size:14px;box-shadow:0 4px 25px #0002;opacity:0;pointer-events:none;transition:opacity .15s;z-index:20}#toast.show{opacity:1}dialog{max-width:640px;width:calc(100% - 32px);max-height:85vh;border:1px solid #d7e0d9;border-radius:8px;padding:26px;color:#33473b}dialog::backdrop{background:#15281c77}.dialog-heading{display:flex;justify-content:space-between;align-items:center}.rule-content{font-size:14px;line-height:1.9}.rule-content h3{font-size:15px;color:#28604c;margin:24px 0 8px}.rule-content p{color:#66756b}.last-marker{pointer-events:none}.focus-point{pointer-events:none}#board .point{cursor:pointer}@media(min-width:1450px){main{max-width:1320px}.game-layout{grid-template-columns:minmax(0,1fr) 355px}header{padding-left:calc((100vw - 1264px)/2);padding-right:calc((100vw - 1264px)/2)}}@media(max-width:850px){header{height:66px;padding:0 20px}main{padding:24px 16px 0}.game-layout{grid-template-columns:minmax(0,1fr);gap:14px}.page-heading{margin-bottom:20px}h1{font-size:20px}.mode-badge{font-size:12px;padding:7px 9px}.board-wrap{padding:9px}.board-caption{padding:15px 0}aside{display:grid;grid-template-columns:1fr 1fr;align-items:start}.notes{grid-column:1/-1}.panel{padding:18px}nav{gap:18px}.brand{font-size:28px}.brand-divider{margin:0 12px}.brand-game{font-size:16px}footer{font-size:11px;letter-spacing:0}.desktop-note{display:none!important}}@media(max-width:520px){aside{display:flex}.page-heading{align-items:flex-end}h1{font-size:17px;letter-spacing:1px}.eyebrow{font-size:11px}.mode-badge{font-size:11px}nav #identity{display:none}.board-toolbar{font-size:12px}.panel{padding:20px}.board-caption{font-size:11px}header nav .text-button{font-size:13px}}