.piece{width:9.15%;aspect-ratio:1 / 1;border-radius:50%;cursor:pointer;position:absolute;-webkit-user-select:none;user-select:none;transform:translate(-50%,-50%);transition:transform .2s,box-shadow .2s;z-index:10}.piece.selected{transform:translate(-50%,-60%) scale(1.1);box-shadow:0 10px 20px #00000080;z-index:20}.piece.recently-moved .piece-inner{box-shadow:0 0 0 3px #ffd874bf,2px 2px 5px #0006}.piece-inner{width:100%;height:100%;border-radius:50%;background-image:url(../piece.png);background-size:115%;background-position:center;box-shadow:2px 2px 5px #0006;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.piece.red .piece-text{color:#cf0000;text-shadow:0 1px 1px rgba(255,255,255,.3)}.piece.black .piece-text{color:#111;text-shadow:0 1px 1px rgba(255,255,255,.3)}.piece-text{font-family:KaiTi,STKaiti,BiauKai,serif;font-weight:700;font-size:clamp(1.2rem,5vw,2.2rem);z-index:2;margin-top:-2px}.piece-shine{position:absolute;top:0;left:0;width:100%;height:50%;background:linear-gradient(to bottom,rgba(255,255,255,.2),transparent);border-radius:50% 50% 0 0;pointer-events:none}.board-container{position:relative;width:100%;aspect-ratio:1 / 1;background-color:transparent;margin:0 auto;-webkit-user-select:none;user-select:none;touch-action:manipulation}.intersection-target{position:absolute;width:8.2%;aspect-ratio:1 / 1;transform:translate(-50%,-50%);cursor:pointer;z-index:5}.valid-move-indicator{position:absolute;width:3.8%;aspect-ratio:1 / 1;background-color:#1cbe58c7;border:2px solid rgba(225,255,225,.72);border-radius:50%;transform:translate(-50%,-50%);z-index:16;pointer-events:auto;cursor:pointer;box-shadow:0 0 10px #1cbe58b3}.valid-move-indicator:hover{background-color:#20dc66e6;transform:translate(-50%,-50%) scale(1.18)}.last-move-marker{position:absolute;width:8.8%;aspect-ratio:1 / 1;border-radius:50%;transform:translate(-50%,-50%);pointer-events:none;z-index:8;border:2px solid rgba(255,236,166,.75);background:#ffd6622e;box-shadow:0 0 18px #ffd66273}.last-move-marker.from{opacity:.55}.last-move-marker.to{opacity:.95}:root{--surface-0: #17120e;--surface-1: #21170f;--surface-2: #2c1e13;--panel: rgba(24, 18, 13, .78);--panel-strong: rgba(15, 20, 17, .86);--line: rgba(221, 171, 94, .24);--line-strong: rgba(221, 171, 94, .42);--gold: #d6a75d;--gold-soft: #f0d7a9;--jade: #7fd4a8;--jade-deep: #1f6b50;--red-piece: #ff6259;--text: #f5ead7;--muted: #baa98c;--shadow: rgba(16, 9, 4, .55);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans SC,PingFang SC,Microsoft 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28px rgba(0,0,0,.45);letter-spacing:0}.turn-indicator{min-width:260px;display:grid;justify-items:end;gap:3px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#0f0c09b8;box-shadow:0 14px 36px var(--shadow)}.turn-indicator span{color:var(--muted);font-size:.82rem;font-weight:700}.turn-indicator strong{color:var(--jade);font-size:1.08rem}.turn-indicator.red strong{color:#ff7b72}.thinking-dots{color:var(--gold-soft);font-size:.85rem;font-style:normal}.status-message{color:var(--gold-soft);font-weight:800;animation:pulse 1s infinite}.game-layout{display:grid;grid-template-columns:minmax(560px,660px) minmax(330px,1fr);gap:22px;align-items:start}.seo-intro{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px;align-items:center;margin:0 0 18px;padding:16px 18px;border:1px solid var(--line);border-radius:10px;background:linear-gradient(135deg,#7fd4a81f,#d6a75d14),#0f0c09b3;box-shadow:0 14px 34px #0000002e}.seo-intro h2{margin:0 0 6px;color:var(--gold-soft);font-size:1.16rem;line-height:1.25}.seo-intro p{margin:0;max-width:760px;color:var(--muted);font-size:.96rem}.seo-links{display:flex;flex-wrap:wrap;gap:9px;justify-content:flex-end}.seo-links a{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 13px;border:1px solid rgba(127,212,168,.32);border-radius:8px;color:var(--jade);background:#0f1411b8;font-size:.9rem;font-weight:700;text-decoration:none}.seo-links a:hover{color:var(--gold-soft);border-color:var(--gold)}.board-column,.game-rail{display:grid;gap:12px}.board-column{justify-items:center}.game-rail{align-self:start;position:sticky;top:18px}.board-shell{width:min(100%,640px);padding:12px;border:1px solid rgba(243,216,170,.22);border-radius:10px;background:linear-gradient(145deg,#ffefc71f,#ffefc705),#0c0b0957;box-shadow:0 26px 70px #0000006b}.board-area{position:relative;width:100%;aspect-ratio:1 / 1;overflow:hidden;border-radius:6px;background-image:url(../board.png);background-size:100% 100%;background-position:center;background-repeat:no-repeat;box-shadow:inset 0 0 0 1px #ffffff29}.ad-slot{width:100%;min-height:52px;display:flex;align-items:center;justify-content:center;color:#f6e7c494;background:#0c090752;border:1px dashed rgba(214,167,93,.28);border-radius:10px;font-size:.82rem}.ad-slot-top{width:min(100%,640px)}.ad-slot-bottom{min-height:68px}.feedback-bar{width:min(100%,640px);display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;padding:12px 14px;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:0 14px 32px #0000003d}.feedback-bar strong{color:var(--jade);text-align:right}.feedback-bar.is-check{border-color:#ff625973;background:#4416129e}.rail-card,.info-panel,.qipu-controls{background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:0 14px 34px #00000038}.status-card{display:grid;gap:7px;padding:14px;background:var(--panel-strong)}.status-card strong{color:var(--jade);font-size:1rem;line-height:1.35}.status-card small{color:var(--gold-soft);font-size:.9rem;line-height:1.35}.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;padding:10px;border:1px solid rgba(214,167,93,.16);border-radius:12px;background:#09080752}button,.rules-link{min-height:42px;border:1px solid rgba(214,167,93,.34);border-radius:8px;color:var(--text);background:linear-gradient(180deg,#7e4f22eb,#4d2f16f5);box-shadow:0 10px 20px #00000040;cursor:pointer;transition:transform .18s ease,border-color .18s ease,background .18s ease,box-shadow .18s ease}button{padding:10px 14px;font-weight:700}button:hover:not(:disabled),.rules-link:hover{transform:translateY(-1px);border-color:#f0d7a9a8;box-shadow:0 14px 26px #00000057}button:active:not(:disabled),.rules-link:active{transform:translateY(1px)}button:disabled{opacity:.48;cursor:not-allowed;filter:saturate(.35)}.control-button.primary,.lang-toggle{background:linear-gradient(180deg,#d6a75dfa,#845423fa);color:#201309;border-color:#f0d7a9ad}.icon-button{min-width:0;font-size:1rem}.difficulty-selector{grid-column:1 / -1;display:grid;grid-template-columns:auto repeat(3,1fr);gap:7px;align-items:center;padding:9px;border-radius:10px;background:#0a090894}.difficulty-selector span{color:var(--muted);font-size:.85rem;font-weight:800}.difficulty-selector button{min-height:36px;padding:7px 8px;font-size:.82rem}.difficulty-selector button.active{color:#102018;background:linear-gradient(180deg,#99e0bb,#4fa176);border-color:#7fd4a8c7}.rules-link{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;text-decoration:none;font-weight:700;text-align:center}.share-message{color:var(--jade);background:#124a3675;border:1px solid rgba(127,212,168,.38);padding:10px 12px;border-radius:10px}.play-panels{display:grid;gap:10px}.info-panel{padding:14px;min-height:116px}.info-panel h2{margin:0 0 10px;color:var(--gold-soft);font-size:1rem;line-height:1.2}.info-panel p{margin:0 0 8px;line-height:1.45}.move-log{margin:0;padding-left:22px;display:grid;gap:6px;font-size:.93rem;line-height:1.35}.move-log li.red{color:#ffb3a9}.move-log li.black{color:#d8dedb}.captured-row{display:grid;grid-template-columns:90px 1fr;gap:10px;align-items:start;margin-bottom:10px;color:#dbc9a8}.captured-piece{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:28px;margin:0 4px 4px 0;border-radius:50%;background:#e6b87d29;border:1px solid rgba(230,184,125,.36);font-family:KaiTi,STKaiti,BiauKai,serif;font-weight:700}.captured-piece.red{color:var(--red-piece)}.captured-piece.black{color:#f2f1ea}.empty-list{color:var(--muted);font-size:.92rem}.challenge-card{background:#1747348f;border-color:#7fd4a866}.challenge-card.solved{background:#2658349e}.challenge-card strong{color:var(--jade)}.tip-text{color:#ccebd9}.qipu-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;padding:12px;align-items:center}.qipu-mode-badge,.move-count,.qipu-title,.qipu-study-card{grid-column:1 / -1}.qipu-mode-badge{width:max-content;color:#13221a;background:var(--jade);padding:4px 8px;border-radius:6px;font-weight:800;font-size:.8rem}.move-count{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;color:var(--gold);font-weight:800}.qipu-title{color:var(--gold-soft);font-weight:800}.qipu-study-card{padding:11px;background:#00000038;border-radius:8px}.qipu-study-card strong{color:var(--jade)}.qipu-study-card p{margin:6px 0 0;color:#e6d7bd;line-height:1.45}.modal-overlay{position:fixed;inset:0;z-index:2000;display:flex;align-items:center;justify-content:center;padding:18px;background:#080605d6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.modal-content{width:min(100%,560px);max-height:84vh;overflow:hidden;display:flex;flex-direction:column;border-radius:12px;box-shadow:0 28px 74px #00000080}.glass{background:#1b130eeb;border:1px solid var(--line-strong)}.modal-header{padding:18px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.modal-header h2{margin:0;color:var(--gold-soft);font-family:KaiTi,STKaiti,BiauKai,serif;letter-spacing:0}.close-btn{min-width:0;min-height:0;padding:4px 8px;background:transparent;border:0;box-shadow:none;color:var(--muted);font-size:1.8rem;line-height:1}.modal-body{padding:18px;overflow-y:auto}.qipu-list{display:grid;gap:12px}.qipu-item{padding:14px;border-radius:10px;border:1px solid rgba(255,255,255,.08);background:#ffffff0b;cursor:pointer;transition:transform .18s ease,border-color .18s ease,background .18s ease}.qipu-item:hover{transform:translateY(-1px);border-color:var(--jade);background:#7fd4a81a}.qipu-item h3{margin:0 0 6px;color:var(--gold-soft)}.qipu-item p{margin:0 0 10px;color:#ded0ba;font-size:.92rem;line-height:1.45}.qipu-meta{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;color:var(--muted);font-size:.85rem}.select-game-btn{min-height:34px;padding:6px 10px;font-size:.82rem}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.03)}to{transform:scale(1)}}@media(max-width:1040px){.game-layout,.seo-intro{grid-template-columns:1fr}.seo-links{justify-content:flex-start}.game-rail{position:static;width:min(100%,640px);margin:0 auto}.play-panels{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:640px){.app-container{padding:12px}.game-header{display:grid;justify-items:center;text-align:center;gap:12px}h1{font-size:2.2rem}.turn-indicator{min-width:0;width:100%;justify-items:center}.board-shell{padding:7px}.feedback-bar{grid-template-columns:1fr}.feedback-bar strong{text-align:left}.controls,.qipu-controls,.play-panels,.difficulty-selector{grid-template-columns:1fr}button,.rules-link{width:100%}.captured-row{grid-template-columns:78px 1fr}.qipu-meta{grid-template-columns:1fr}}