:root{--paper:#f5f2ea;--ink:#303b34;--muted:#8d9387;--green:#486452;--line:#deded2;--red:#ac5846;font-family:PingFang SC,Microsoft YaHei,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,a,canvas{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;transition:background .18s,transform .18s}button:active{transform:translateY(1px)}button:focus-visible,a:focus-visible{outline:2px solid var(--green);outline-offset:4px}button:disabled{opacity:.4;cursor:default}button:hover:not(:disabled){filter:brightness(.95)}.shell{max-width:1200px;margin:auto;padding:0 48px;min-height:100svh;display:flex;flex-direction:column}header{height:106px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);flex-shrink:0}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:var(--ink);font-family:serif;font-size:22px;letter-spacing:4px}.brand-icon{display:grid;place-items:center;border:1px solid #606c5d;border-radius:5px;width:39px;height:39px;font-size:26px;letter-spacing:0}.brand-sub{display:block;font:8px sans-serif;letter-spacing:2.3px;margin-top:5px;color:#8a9185}.quiet{background:transparent;border:0;color:#6f786d;font-size:20px}.quiet span{font-size:12px;margin-left:8px}.game{display:grid;grid-template-columns:minmax(0,1fr) 282px;gap:65px;align-items:center;flex:1;padding:36px 0}.playfield{min-width:0;max-width:650px;width:100%;justify-self:center}.board-top,.board-bottom{display:flex;align-items:center;justify-content:space-between;color:#899080;font-size:11px}.board-top{margin:0 4px 18px;letter-spacing:1.4px}.board-tag{font-size:10px;letter-spacing:2px}.board-frame{padding:5px;background:#e2c99e;border:1px solid #d7bd93;border-radius:7px;box-shadow:0 18px 35px -20px #6f563d60,0 2px 3px #9b7c3920,inset 0 0 0 2px #f4dfba}canvas{display:block;width:100%;aspect-ratio:1;outline:none;touch-action:manipulation;background:repeating-linear-gradient(92deg,#edd8b100,#d6b77a0a,#f6e4c00c 4px),linear-gradient(110deg,#eedab6,#e7cea5);border-radius:3px}.board-bottom{margin:18px 4px 0;font-size:10px}.red-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--red);margin-right:7px}aside{padding-top:8px}.eyebrow{font-size:10px;letter-spacing:4px;color:#919684}h1{font-family:Songti SC,STSong,serif;font-size:49px;font-weight:500;letter-spacing:7px;margin:12px 0 8px;display:flex;align-items:center;gap:18px}.seal{writing-mode:vertical-rl;border:1px solid var(--red);padding:5px 3px;font-size:12px;letter-spacing:2px;color:var(--red);border-radius:2px}.intro{font-family:serif;font-size:13px;letter-spacing:2px;color:#939888;margin:0 0 30px}.mode{display:flex;background:#e9eae0;padding:4px;border-radius:6px}.mode button{width:50%;padding:10px 4px;border:0;background:none;font-size:12px;color:#8a8f80;border-radius:4px}.mode .selected{background:#faf9f3;color:var(--green);box-shadow:0 1px 5px #3344330d}.turn-panel{margin-top:26px;border-bottom:1px solid var(--line);padding-bottom:21px}.status-line{display:flex;align-items:center;gap:14px}.stone{display:inline-block;border-radius:50%;width:34px;height:34px;flex-shrink:0;box-shadow:0 3px 5px #2222}.black{background:radial-gradient(circle at 32% 26%,#555953,#202722 75%)}.white{background:radial-gradient(circle at 32% 26%,#fff,#e3e1d7);border:1px solid #d7d6ca}h2{font-size:17px;font-weight:500;margin:0 0 5px}.status-line p{font-size:11px;color:#959a8c;margin:0}.live-dot{width:5px;height:5px;border-radius:50%;background:#82977a;margin-left:auto}.players{display:flex;justify-content:space-between;font-size:10px;color:#8a9082;margin-top:20px}.players b{font-weight:400;color:#626d5d}.tiny{width:9px;height:9px;display:inline-block;border-radius:50%;margin-right:5px}.move-count{display:flex;align-items:center;justify-content:space-between;margin:20px 0;color:#8a9082;font-size:11px}.move-count strong{font-family:Georgia,serif;font-size:26px;color:#636f5d;font-weight:400}.actions{display:grid;grid-template-columns:1fr 85px;gap:10px}.primary{background:var(--green);color:#f9faf1;border:1px solid var(--green);padding:13px 18px;border-radius:5px;font-size:12px}.primary span{float:right;font-size:16px;margin-left:16px}.secondary{border:1px solid #d8dccf;background:transparent;border-radius:5px;font-size:12px;color:#727e69}.rule-summary{margin-top:31px;border-top:1px solid var(--line);padding-top:24px}.five{font-size:11px;letter-spacing:4px;color:#7a856f}.rule-summary p{font-size:10px;color:#949a8c;margin:10px 0 14px}.text-button{border:0;background:none;color:#6c7c60;font-size:10px;padding:3px 0}.text-button span{margin-left:10px}.note{font-size:10px;color:#7d8d6e;height:15px;margin-top:10px}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:22px 0;color:#a1a696;font-size:10px;letter-spacing:1px}dialog{width:min(430px,calc(100% - 32px));border:1px solid var(--line);border-radius:10px;background:var(--paper);padding:32px;color:var(--ink);box-shadow:0 24px 100px #2223}dialog::backdrop{background:#24312855;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}dialog h2{font-family:serif;font-size:24px;margin:20px 0}dialog p{font-size:13px;line-height:1.9;color:#75806e}dialog .primary{width:100%;margin-top:12px}#close{position:absolute;right:12px;top:8px;background:none;border:0;font-size:28px;color:#8a927f}@media(min-width:900px)and (max-height:780px){.shell{max-width:1050px}header{height:80px}.game{gap:48px;padding:20px 0;grid-template-columns:minmax(0,1fr) 265px}.playfield{max-width:calc(100svh - 190px)}h1{font-size:42px}.intro{margin-bottom:22px}.rule-summary{margin-top:22px;padding-top:18px}}@media(max-width:760px){.shell{padding:0 20px}header{height:72px}.game{grid-template-columns:1fr;gap:22px;padding:23px 0}.playfield{max-width:520px}.board-top{margin-bottom:12px}.board-bottom{margin-top:12px}aside{padding:0;max-width:520px;width:100%;justify-self:center;display:grid;grid-template-columns:1fr 1fr;gap:12px 18px}.heading{display:none}.mode{grid-column:1/-1}.turn-panel{margin:3px 0 0;padding-bottom:13px;grid-column:1/-1}.players{margin-top:12px}.move-count{margin:0}.actions{grid-column:1/-1;grid-template-columns:1fr 100px}.rule-summary{grid-column:1/-1;display:flex;align-items:center;gap:10px;margin:3px 0 0;padding-top:15px}.rule-summary p{margin:0;font-size:10px}.rule-summary .five{display:none}.text-button{margin-left:auto;white-space:nowrap}.note{margin:0;grid-column:1/-1}.move-count{grid-column:1/-1}.move-count strong{font-size:21px}footer{padding:16px 0;font-size:9px}.stone{width:29px;height:29px}h2{font-size:15px}.mode button{padding:11px 0}}@media(prefers-reduced-motion:reduce){button{transition:none}}@media(min-width:761px){.playfield{max-width:min(650px,calc(100svh - 240px))}.game{min-height:0}aside{align-self:center}.rule-summary{line-height:1.5}}