:root{--bg: #E0F5F2;--bg-2: #C7ECE6;--tile-bg: #4DB6AC;--tile-bg-2: #26A69A;--tile-bg-hi: #80CBC4;--tile-border: #00897B;--tile-selected: #FF6F00;--tile-text: #004D40;--accent: #FF8F00;--accent-2: #E65100;--danger: #E74C3C;--hud-bg: rgba(255, 255, 255, .8);--line: #FF8F00}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0;height:100%;overflow:hidden;background:radial-gradient(120% 80% at 50% -10%,#fff,#fff0 55%),linear-gradient(170deg,var(--bg) 0%,var(--bg-2) 100%);background-attachment:fixed;font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;color:var(--tile-text)}#app{display:flex;flex-direction:column;height:100vh;height:100dvh;max-width:600px;margin:0 auto}.hud{display:flex;align-items:center;justify-content:space-around;padding:10px 14px;margin:8px 10px 4px;background:var(--hud-bg);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.7);border-radius:16px;box-shadow:0 4px 16px #00695c1f;font-size:clamp(14px,4vw,18px);font-weight:700;color:var(--tile-text);flex-shrink:0}.hud-level,.hud-stars,.hud-time{display:flex;align-items:center;gap:4px}.hud-hint{background:linear-gradient(145deg,var(--tile-bg-hi),var(--tile-bg-2));border:2px solid var(--tile-border);border-radius:12px;padding:5px 12px;font-size:inherit;font-weight:700;color:var(--tile-text);cursor:pointer;box-shadow:0 2px #e6510040;transition:transform .12s ease,box-shadow .12s ease}.hud-hint:active{transform:translateY(1px);box-shadow:0 1px #e6510040}.hud-hint:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}.hud-bottom{display:flex;justify-content:center;gap:10px;padding:6px 10px 10px;flex-shrink:0}.hud-bottom button{background:linear-gradient(145deg,var(--tile-bg-hi),var(--tile-bg-2));border:2px solid var(--tile-border);border-radius:12px;padding:7px 18px;font-size:14px;font-weight:700;color:var(--tile-text);cursor:pointer;box-shadow:0 2px #e6510040;transition:transform .12s ease,box-shadow .12s ease}.hud-bottom button:active{transform:translateY(1px);box-shadow:0 1px #e6510040}.hud-time.timed-out{color:var(--danger);animation:timePulse 1s ease-in-out infinite}.hud-time.timed-out:after{content:" 加油!";font-size:.8em;font-weight:700}@keyframes timePulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(1.08)}}.board-area{flex:1;display:flex;align-items:center;justify-content:center;overflow-y:auto;padding:8px;position:relative}.board-grid{display:grid;gap:6px;padding:6px;width:100%;max-width:100%}.tile{display:flex;align-items:center;justify-content:center;background:linear-gradient(145deg,var(--tile-bg-hi) 0%,var(--tile-bg) 45%,var(--tile-bg-2) 100%);border:2px solid var(--tile-border);border-radius:20%;font-size:clamp(24px,7vw,44px);font-weight:700;color:var(--tile-text);cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;aspect-ratio:1;min-width:48px;min-height:48px;box-shadow:0 3px #e6510033,0 5px 12px #0050461f,inset 0 2px 3px #ffffffa6}.tile-char{font-size:clamp(28px,8.5vw,50px);font-weight:700;background:linear-gradient(145deg,var(--tile-bg-hi),var(--tile-bg))}.tile-pinyin{font-size:clamp(13px,4vw,24px);font-weight:700;letter-spacing:0;font-family:Segoe UI,-apple-system,PingFang SC,sans-serif;background:linear-gradient(145deg,#ffe082,#ffb300);color:#4e342e;border-color:#e65100}.tile:active{transform:scale(.96)}.tile-empty{background:transparent;border:2px dashed transparent;cursor:default;pointer-events:none;box-shadow:none}.tile.selected{border-color:var(--tile-selected);border-width:3px;transform:scale(1.06);box-shadow:0 0 0 3px #ff8f0040,0 6px 16px #ff8f0061,inset 0 2px 3px #ffffffa6}.tile.fail{animation:shake .4s;border-color:var(--danger);box-shadow:0 0 0 3px #ef535040,0 4px 12px #ef53504d}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}.tile.removing{animation:removeAnim .2s forwards}@keyframes removeAnim{to{opacity:0;transform:scale(.8)}}.tile.hint{animation:hintPulse .5s 3;border-color:var(--accent)}@keyframes hintPulse{0%,to{transform:scale(1)}50%{transform:scale(1.1);box-shadow:0 0 14px var(--accent)}}.board-svg{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;overflow:visible}.path-dot{animation:dotPulse .5s ease-in-out infinite alternate;transform-box:fill-box;transform-origin:center}@keyframes dotPulse{0%{opacity:.65;transform:scale(.85)}to{opacity:1;transform:scale(1.25)}}.modal-overlay{position:fixed;inset:0;background:#0028238c;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .2s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-card{background:linear-gradient(170deg,#fffdf6,#fff3e0);border:1px solid rgba(255,255,255,.8);border-radius:24px;padding:28px 36px;text-align:center;box-shadow:0 20px 50px #50320059;animation:popIn .26s cubic-bezier(.22,1.2,.36,1)}@keyframes popIn{0%{opacity:0;transform:scale(.82) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}.modal-title{font-size:30px;font-weight:700;color:var(--tile-text);margin-bottom:14px}.modal-stars{font-size:36px;margin-bottom:22px;letter-spacing:4px}.modal-star{display:inline-block;opacity:0}.modal-buttons{display:flex;gap:12px;justify-content:center}.modal-buttons button{background:linear-gradient(145deg,var(--tile-bg-hi),var(--tile-bg-2));border:2px solid var(--tile-border);border-radius:12px;padding:10px 22px;font-size:16px;font-weight:700;color:var(--tile-text);cursor:pointer;box-shadow:0 3px #e6510040;transition:transform .12s ease,box-shadow .12s ease}.modal-buttons button:active{transform:translateY(2px);box-shadow:0 1px #e6510040}.modal-buttons .btn-next{background:linear-gradient(145deg,#FFB74D,var(--accent));color:#fff;border-color:var(--accent-2);box-shadow:0 3px 0 var(--accent-2)}.level-select{display:flex;flex-direction:column;align-items:center;padding:24px 20px;height:100%}.level-select-title{font-size:26px;font-weight:700;color:var(--tile-text);margin-bottom:22px}.level-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;width:100%;max-width:420px}.level-btn{aspect-ratio:1;background:linear-gradient(145deg,var(--tile-bg-hi),var(--tile-bg-2));border:2px solid var(--tile-border);border-radius:20px;font-size:22px;font-weight:700;color:var(--tile-text);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 3px #e6510038,0 5px 12px #0050461a;transition:transform .12s ease,box-shadow .12s ease}.level-btn:active{transform:translateY(2px);box-shadow:0 1px #e6510038}.level-btn.locked{opacity:.5;cursor:not-allowed;box-shadow:none}.level-btn-stars{font-size:12px;margin-top:4px}.btn-back{margin-top:22px;background:linear-gradient(145deg,var(--tile-bg-hi),var(--tile-bg-2));border:2px solid var(--tile-border);border-radius:12px;padding:9px 26px;font-size:16px;font-weight:700;color:var(--tile-text);cursor:pointer;box-shadow:0 3px #e6510040}@media (orientation: landscape) and (max-height: 500px){#app:after{content:"请旋转手机至竖屏 📱";position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);font-size:24px;color:var(--tile-text);background:var(--bg);padding:20px 40px;border-radius:16px;z-index:999}}.start-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:22px;padding:20px}.start-title{font-size:42px;font-weight:900;letter-spacing:4px;background:linear-gradient(135deg,#00897b,#26a69a,#ff8f00);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;text-shadow:0 4px 14px rgba(255,143,0,.18)}.btn-start,.btn-levels{background:linear-gradient(145deg,var(--tile-bg-hi),var(--tile-bg-2));border:2px solid var(--tile-border);border-radius:16px;padding:14px 44px;font-size:20px;font-weight:700;color:var(--tile-text);cursor:pointer;box-shadow:0 4px #e6781e40,0 8px 18px #00504624;transition:transform .12s ease,box-shadow .12s ease}.btn-start{background:linear-gradient(145deg,#FFB74D,var(--accent));color:#fff;border-color:var(--accent-2);box-shadow:0 4px 0 var(--accent-2),0 8px 18px #e6510033}.btn-start:active,.btn-levels:active{transform:translateY(3px);box-shadow:0 1px #e6781e40}.btn-start:active{box-shadow:0 1px 0 var(--accent-2)}.settings{display:flex;gap:18px;margin-top:6px;font-size:16px;font-weight:700;color:var(--tile-text)}.settings label{display:flex;align-items:center;gap:6px;cursor:pointer;padding:6px 14px;background:var(--hud-bg);border:1px solid rgba(255,255,255,.7);border-radius:12px;box-shadow:0 2px 8px #00695c14}.settings input{width:18px;height:18px;accent-color:var(--accent);cursor:pointer}.speech-hint{margin-top:10px;padding:10px 14px;max-width:92%;font-size:13px;font-weight:400;line-height:1.5;color:#6b4a1e;background:#fff3cd;border:1px solid #F2C766;border-radius:12px;text-align:center}.start-screen .btn-hub{background:linear-gradient(145deg,#eceff1,#cfd8dc);border:2px solid #90A4AE;border-radius:16px;padding:12px 36px;font-size:18px;font-weight:700;color:#455a64;cursor:pointer;box-shadow:0 4px #90a4ae,0 8px 18px #78909c24;transition:transform .12s ease,box-shadow .12s ease}.start-screen .btn-hub:active{transform:translateY(3px);box-shadow:0 1px #90a4ae}