.chess-container .card{background:var(--card);border-radius:var(--radius);box-shadow:0 1px 6px #00000012;padding:20px;margin-bottom:16px}@media(max-width:600px){.chess-container .card{padding:14px}}.chess-container .chess-board-wrap{width:100%;max-width:540px;margin:0 auto 14px}.chess-container .chess-board{width:100%;aspect-ratio:1 / 1;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);border:2px solid var(--border);border-radius:6px;overflow:hidden;box-shadow:0 2px 12px #0000001f;user-select:none;position:relative}.chess-container .chess-sq{position:relative;display:flex;align-items:center;justify-content:center;font-size:clamp(28px,7.5vw,56px);line-height:1;cursor:default}.chess-container .chess-sq-light{background:#ecd9b6}.chess-container .chess-sq-dark{background:#b58a64}[data-theme=dark] .chess-container .chess-sq-light{background:#d4ba8c}[data-theme=dark] .chess-container .chess-sq-dark{background:#8b6743}.chess-container .chess-sq-from,.chess-container .chess-sq-to{box-shadow:inset 0 0 0 4px #ffdc50b3}.chess-container .chess-sq-check{box-shadow:inset 0 0 0 4px #dc3c3cc7}.chess-container .chess-coord{position:absolute;font-size:9px;font-weight:600;font-family:var(--font-mono);pointer-events:none;opacity:.7}.chess-container .chess-coord-file{bottom:1px;right:3px}.chess-container .chess-coord-rank{top:1px;left:3px}.chess-container .chess-sq-light .chess-coord{color:#8b6743}.chess-container .chess-sq-dark .chess-coord{color:#ecd9b6}[data-theme=dark] .chess-container .chess-sq-light .chess-coord{color:#5a3f22}[data-theme=dark] .chess-container .chess-sq-dark .chess-coord{color:#f4e4c1}@media(max-width:480px){.chess-container .chess-coord{font-size:8px}}.chess-container .chess-piece{display:inline-block;line-height:1;transition:transform .15s;pointer-events:none}.chess-container .chess-piece-white{color:#fff;text-shadow:-1px -1px 0 #1a1a1a,1px -1px 0 #1a1a1a,-1px 1px 0 #1a1a1a,1px 1px 0 #1a1a1a,0 0 2px rgba(0,0,0,.4)}.chess-container .chess-piece-black{color:#1a1a1a;text-shadow:-1px -1px 0 #fff,1px -1px 0 #fff,-1px 1px 0 #fff,1px 1px 0 #fff,0 0 2px rgba(255,255,255,.3)}.chess-container .chess-info-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:8px}.chess-container .chess-info-left{display:flex;align-items:baseline;gap:8px;flex:1;min-width:0}.chess-container .chess-eco{font-family:var(--font-mono);font-size:12px;color:var(--sub);padding:2px 7px;background:var(--card-alt);border:1px solid var(--border);border-radius:6px;flex-shrink:0}.chess-container .chess-opening-name{font-size:14.5px;font-weight:600;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chess-container .chess-ply{font-family:var(--font-mono);font-size:13px;color:var(--sub);flex-shrink:0}.chess-container .chess-hotkey-hint{font-size:11.5px;color:var(--sub);text-align:center;margin-bottom:12px;line-height:1.6}.chess-container .chess-hotkey-hint kbd{display:inline-block;padding:1px 6px;background:var(--card-alt);border:1px solid var(--border);border-radius:4px;font-size:11px;font-family:var(--font-mono);color:var(--text);box-shadow:0 1px 0 var(--border);margin:0 1px}.chess-container .chess-controls{display:flex;flex-wrap:wrap;align-items:center;gap:6px;padding:10px 12px;background:var(--card-alt);border:1px solid var(--border);border-radius:10px;margin-bottom:14px}.chess-container .chess-ctrl-btn{min-width:38px;height:34px;padding:0 10px;border-radius:8px;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:14px;cursor:pointer;transition:border-color .15s,color .15s,background .15s;font-family:inherit}.chess-container .chess-ctrl-btn:hover{border-color:var(--primary);color:var(--primary)}.chess-container .chess-ctrl-btn:disabled{opacity:.4;cursor:not-allowed}.chess-container .chess-ctrl-play{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600}.chess-container .chess-ctrl-play:hover{filter:brightness(1.06);color:#fff}.chess-container .chess-speed{display:inline-flex;align-items:center;gap:6px;margin-left:auto;font-size:12.5px;color:var(--sub)}.chess-container .chess-speed input[type=range]{width:90px;accent-color:var(--primary)}.chess-container .chess-speed>span:last-child{font-family:var(--font-mono);min-width:36px;text-align:right}@media(max-width:480px){.chess-container .chess-speed{margin-left:0;width:100%;margin-top:4px}.chess-container .chess-speed input[type=range]{flex:1;width:auto}}.chess-container .chess-movelist-wrap{margin-bottom:14px}.chess-container .chess-section-label{font-size:13px;color:var(--sub);font-weight:500}.chess-container .chess-movelist{display:flex;flex-wrap:wrap;gap:4px 8px;margin-top:8px;padding:10px 12px;background:var(--card-alt);border:1px solid var(--border);border-radius:8px;font-family:var(--font-mono);font-size:13.5px;max-height:110px;overflow-y:auto;min-height:38px}.chess-container .chess-movelist:empty:before{content:"尚未载入棋谱";color:var(--sub);font-style:italic;font-family:inherit;font-size:13px}.chess-container .chess-mv-num{color:var(--sub);font-weight:600}.chess-container .chess-mv{cursor:pointer;padding:1px 5px;border-radius:4px;color:var(--text);transition:background .12s,color .12s}.chess-container .chess-mv:hover{background:var(--card);color:var(--primary)}.chess-container .chess-mv-active{background:var(--primary)!important;color:#fff!important}.chess-container .chess-presets-wrap{margin-bottom:14px}.chess-container .chess-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.chess-container .chess-preset-chip{display:inline-flex;align-items:center;gap:6px;padding:6px 8px 6px 12px;border-radius:16px;border:1px solid var(--border);background:var(--card-alt);color:var(--text);font-size:12.5px;cursor:pointer;transition:border-color .15s,color .15s,transform .15s;font-family:inherit}.chess-container .chess-preset-chip:hover{border-color:var(--primary);color:var(--primary)}.chess-container .chess-preset-chip:active{transform:scale(.97)}.chess-container .chess-preset-chip.is-active{border-color:var(--primary);color:var(--primary);background:color-mix(in srgb,var(--primary) 8%,var(--card-alt))}.chess-container .chess-preset-eco{font-family:var(--font-mono);font-size:11px;color:var(--sub);padding:1px 4px;background:var(--card);border-radius:3px}.chess-container .chess-tip{display:inline-flex;align-items:center;justify-content:center;width:14px;height:14px;border-radius:50%;background:var(--card);border:1px solid var(--border);color:var(--sub);font-size:10px;font-weight:700;cursor:help;position:relative}.chess-container .chess-preset-chip .chess-tip{background:var(--card)}.chess-container .chess-preset-chip:hover .chess-tip{background:var(--card-alt)}.chess-container .chess-tip:before,.chess-container .chess-tip:after{visibility:hidden;opacity:0;transition:opacity .15s,visibility .15s;pointer-events:none}.chess-container .chess-tip:after{content:attr(data-tip);position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);background:#1f1f2a;color:#fff;padding:7px 11px;border-radius:6px;font-size:12px;font-weight:400;line-height:1.5;width:max-content;max-width:260px;white-space:pre-line;text-align:left;box-shadow:0 4px 12px #0000002e;z-index:20}.chess-container .chess-tip:before{content:"";position:absolute;bottom:calc(100% + 2px);left:50%;transform:translate(-50%);border:6px solid transparent;border-top-color:#1f1f2a;z-index:20}.chess-container .chess-tip:hover:before,.chess-container .chess-tip:hover:after,.chess-container .chess-tip:focus:before,.chess-container .chess-tip:focus:after{visibility:visible;opacity:1}[data-theme=dark] .chess-container .chess-tip:after{background:#3a3a4a}[data-theme=dark] .chess-container .chess-tip:before{border-top-color:#3a3a4a}@media(max-width:480px){.chess-container .chess-tip:after{max-width:200px}}.chess-container .chess-pgn-input{margin-bottom:4px}.chess-container .chess-pgn-input textarea{width:100%;margin-top:8px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--card);color:var(--text);font-size:13px;font-family:var(--font-mono);resize:vertical;min-height:76px}.chess-container .chess-pgn-actions{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}.chess-container .chess-btn-primary,.chess-container .chess-btn{padding:8px 18px;border-radius:8px;font-size:14px;cursor:pointer;border:1px solid var(--border);background:var(--card-alt);color:var(--text);font-family:inherit;transition:filter .15s,border-color .15s,color .15s}.chess-container .chess-btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600}.chess-container .chess-btn-primary:hover{filter:brightness(1.06)}.chess-container .chess-btn:hover{border-color:var(--primary);color:var(--primary)}.chess-container .chess-err{margin-top:8px;color:#d33;font-size:12.5px;line-height:1.5}[data-theme=dark] .chess-container .chess-err{color:#ff8a80}.chess-container .chess-tabs{display:inline-flex;gap:2px;padding:3px;background:var(--card-alt);border:1px solid var(--border);border-radius:9px;margin-bottom:10px}.chess-container .chess-tab{padding:5px 14px;border-radius:6px;border:none;background:transparent;color:var(--sub);font-size:12.5px;cursor:pointer;font-family:inherit;transition:background .15s,color .15s}.chess-container .chess-tab:hover{color:var(--text)}.chess-container .chess-tab.is-active{background:var(--card);color:var(--primary);font-weight:600;box-shadow:0 1px 2px #0000000f}.chess-container .chess-game-chip{display:inline-flex;flex-direction:column;align-items:flex-start;gap:2px;padding:7px 12px;border-radius:10px;border:1px solid var(--border);background:var(--card-alt);color:var(--text);cursor:pointer;transition:border-color .15s,color .15s,transform .15s;font-family:inherit;text-align:left;max-width:100%}.chess-container .chess-game-chip:hover{border-color:var(--primary);color:var(--primary)}.chess-container .chess-game-chip:active{transform:scale(.98)}.chess-container .chess-game-chip.is-active{border-color:var(--primary);color:var(--primary);background:color-mix(in srgb,var(--primary) 8%,var(--card-alt))}.chess-container .chess-game-title{font-size:13px;font-weight:600;display:flex;align-items:center;gap:6px;flex-wrap:wrap}.chess-container .chess-game-result{font-family:var(--font-mono);font-size:10.5px;padding:1px 5px;background:var(--card);color:var(--sub);border-radius:3px;font-weight:500}.chess-container .chess-game-meta{font-size:11px;color:var(--sub);font-family:var(--font-mono)}.chess-container .chess-game-brief{padding:10px 12px;margin-bottom:12px;background:color-mix(in srgb,var(--primary) 5%,var(--card-alt));border:1px solid var(--border);border-left:3px solid var(--primary);border-radius:8px;font-size:12.5px;line-height:1.6;color:var(--text)}.chess-container .chess-ctrl-btn.is-active{background:var(--primary);color:#fff;border-color:var(--primary)}.chess-container .chess-ctrl-btn.is-active:hover{filter:brightness(1.06);color:#fff}.chess-container .chess-practice-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:8px 12px;background:color-mix(in srgb,var(--primary) 8%,var(--card-alt));border:1px solid var(--primary);border-radius:8px;margin-bottom:10px;font-size:13px}.chess-container .chess-practice-prompt{font-weight:600;color:var(--primary)}.chess-container .chess-practice-score{margin-left:auto;font-family:var(--font-mono);font-size:12.5px;display:inline-flex;gap:4px}.chess-container .chess-practice-ok{color:#2e7d32}.chess-container .chess-practice-bad{color:#c62828}[data-theme=dark] .chess-container .chess-practice-ok{color:#81c784}[data-theme=dark] .chess-container .chess-practice-bad{color:#ff8a80}.chess-container .chess-practice-divider{color:var(--sub)}.chess-container .chess-practice-hint{padding:4px 10px;font-size:12px;border-radius:6px;border:1px solid var(--border);background:var(--card);color:var(--text);cursor:pointer;font-family:inherit;transition:border-color .15s,color .15s}.chess-container .chess-practice-hint:hover{border-color:var(--primary);color:var(--primary)}.chess-container .chess-board[data-practice=true] .chess-sq{cursor:pointer}.chess-container .chess-sq-wrong{animation:chess-wrong-flash .55s ease}.chess-container .chess-sq-hint{box-shadow:inset 0 0 0 4px #2e7d32b3!important}@keyframes chess-wrong-flash{0%{background-color:#dc3c3c8c;box-shadow:inset 0 0 0 5px #dc3c3cd9}60%{background-color:#dc3c3c4d;box-shadow:inset 0 0 0 5px #dc3c3c8c}to{background-color:transparent;box-shadow:inset 0 0 0 0 transparent}}.chess-container.is-fullscreen{position:fixed;inset:0;z-index:80;max-width:none!important;background:var(--bg);padding:12px;overflow-y:auto;animation:chess-fs-in .18s ease}.chess-container.is-fullscreen>nav,.chess-container.is-fullscreen>.ad-banner-block,.chess-container.is-fullscreen>.tool-explainer,.chess-container.is-fullscreen>.related-block{display:none}.chess-container.is-fullscreen .card{padding:14px;max-width:760px;margin:0 auto}.chess-container.is-fullscreen .chess-board-wrap{max-width:min(72vh,100%)}.chess-container.is-fullscreen .chess-pgn-input,.chess-container.is-fullscreen .chess-help,.chess-container.is-fullscreen .chess-hotkey-hint{display:none}@keyframes chess-fs-in{0%{opacity:.5}to{opacity:1}}.chess-container .chess-fs-exit{position:fixed;top:14px;right:14px;z-index:90;width:36px;height:36px;border-radius:50%;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:15px;cursor:pointer;box-shadow:0 2px 10px #00000026;transition:color .15s,border-color .15s;font-family:inherit}.chess-container .chess-fs-exit:hover{color:var(--primary);border-color:var(--primary)}.chess-container .chess-help{margin-top:16px;padding:12px 14px;background:var(--card-alt);border:1px solid var(--border);border-radius:10px;font-size:13px;color:var(--sub)}.chess-container .chess-help summary{cursor:pointer;font-weight:600;color:var(--text);list-style:none}.chess-container .chess-help summary::-webkit-details-marker{display:none}.chess-container .chess-help summary:before{content:"▸ ";display:inline-block;transition:transform .15s}.chess-container .chess-help[open] summary:before{transform:rotate(90deg)}.chess-container .chess-help-body p{margin:8px 0;line-height:1.7}.chess-container .chess-help-body code{font-family:var(--font-mono);font-size:12px;background:var(--code-inline-bg);color:var(--code-inline-fg);padding:1px 5px;border-radius:4px;border:1px solid var(--code-border)}