:root{--bg: #0c1410;--board: #cfe3c0;--board2: #bcd6ab;--line: #5d7a55;--water: #6db4d8;--trap: #d9b15a;--den: #b5662b;--a: #b3211f;--b: #1d3b66;--gold: #d9a441;--panel: #16241b}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(circle at 50% 0%,#14271b,var(--bg));color:#e9f3df;font-family:Segoe UI,system-ui,sans-serif;display:flex;flex-direction:column;align-items:center;min-height:100%;-webkit-user-select:none;user-select:none}h1{font-size:1.5rem;letter-spacing:.06em;margin:.6rem 0 .1rem}h1 .cn{color:var(--gold)}.sub{color:#9ab589;font-size:.8rem;margin:0 0 .6rem}.bar{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center;justify-content:center;margin-bottom:.5rem}.bar select,.bar button{background:var(--panel);color:#e9f3df;border:1px solid #355031;border-radius:8px;padding:.4rem .7rem;font-size:.85rem;cursor:pointer}.bar button:hover{border-color:var(--gold)}.bar button.primary{background:var(--a);border-color:#d24;color:#fff}#status{min-height:1.4rem;font-size:.95rem;margin:.35rem 0;text-align:center}#status .win{color:var(--gold);font-weight:700}canvas{background:var(--board);border-radius:10px;box-shadow:0 10px 30px #0008;touch-action:manipulation;display:block;margin-inline:auto}.foot{font-size:.72rem;color:#7e9670;margin:.6rem 1rem 1.2rem;max-width:560px;text-align:center;line-height:1.5}.online-panel{margin:8px 0}.online-card{background:#ffffff0f;border:1px solid var(--line);border-radius:10px;padding:10px 12px;display:flex;flex-direction:column;gap:8px}.online-card .online-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.online-card input{width:96px}