*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;user-select:none;margin:0;padding:0}:root{--neon-cyan:#00f0ff;--neon-pink:#ff006e;--neon-purple:#8338ec;--neon-yellow:#ffbe0b;--neon-green:#06ffa5;--neon-orange:#fb5607;--bg-dark:#0a0a14;--bg-panel:#12122a;--text-primary:#e0e0ff;--text-secondary:#88b;--perfect-color:#06ffa5;--good-color:#ffbe0b;--miss-color:#ff006e}html,body{background:var(--bg-dark);width:100%;height:100%;color:var(--text-primary);touch-action:none;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;overflow:hidden}#app{width:100vw;height:100vh;position:relative;overflow:hidden}#game-canvas{z-index:1;width:100%;height:100%;position:absolute;top:0;left:0}.overlay{z-index:10;-webkit-backdrop-filter:blur(4px);background:radial-gradient(#141432eb 0%,#0a0a14fa 100%);flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;animation:.3s fadeIn;display:flex;position:absolute;top:0;left:0}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.title-block{text-align:center;margin-bottom:48px}.game-title{letter-spacing:8px;color:var(--neon-cyan);text-shadow:0 0 10px var(--neon-cyan), 0 0 20px var(--neon-cyan), 0 0 40px #00f0ff80, 0 0 80px #00f0ff4d;font-size:clamp(48px,10vw,96px);font-weight:900;animation:2s ease-in-out infinite neonPulse}@keyframes neonPulse{0%,to{text-shadow:0 0 10px var(--neon-cyan), 0 0 20px var(--neon-cyan), 0 0 40px #00f0ff80, 0 0 80px #00f0ff4d}50%{text-shadow:0 0 15px var(--neon-cyan), 0 0 30px var(--neon-cyan), 0 0 60px #00f0ffb3, 0 0 120px #00f0ff66}}.game-subtitle{color:var(--text-secondary);letter-spacing:6px;margin-top:12px;font-size:clamp(14px,3vw,20px)}.difficulty-select{text-align:center;width:90%;max-width:600px}.section-label{color:var(--text-secondary);letter-spacing:4px;text-transform:uppercase;margin-bottom:20px;font-size:16px}.difficulty-buttons{flex-wrap:wrap;justify-content:center;gap:16px;display:flex}.diff-btn{border:2px solid var(--text-secondary);cursor:pointer;min-width:140px;color:var(--text-primary);background:#141432cc;border-radius:12px;flex-direction:column;align-items:center;gap:8px;padding:24px 32px;transition:all .3s;display:flex}.diff-btn:hover,.diff-btn:active{transform:translateY(-4px)}.diff-btn[data-diff=easy]:hover,.diff-btn[data-diff=easy]:active{border-color:var(--neon-green);box-shadow:0 0 20px #06ffa566}.diff-btn[data-diff=medium]:hover,.diff-btn[data-diff=medium]:active{border-color:var(--neon-yellow);box-shadow:0 0 20px #ffbe0b66}.diff-btn[data-diff=hard]:hover,.diff-btn[data-diff=hard]:active{border-color:var(--neon-pink);box-shadow:0 0 20px #ff006e66}.diff-name{letter-spacing:2px;font-size:22px;font-weight:700}.diff-desc{color:var(--text-secondary);font-size:13px}.best-score-display{text-align:center;margin-top:40px}.best-label{color:var(--text-secondary);letter-spacing:3px;margin-bottom:8px;font-size:14px;display:block}.best-value{color:var(--neon-yellow);text-shadow:0 0 20px #ffbe0b80;font-size:36px;font-weight:900}.result-title{letter-spacing:6px;color:var(--neon-pink);text-shadow:0 0 20px var(--neon-pink), 0 0 40px #ff006e80;margin-bottom:32px;font-size:clamp(36px,8vw,64px);font-weight:900}.result-stats{background:#12122acc;border:1px solid #6464c84d;border-radius:16px;width:90%;max-width:420px;margin-bottom:32px;padding:28px 40px}.stat-row{border-bottom:1px solid #6464c826;justify-content:space-between;align-items:center;padding:10px 0;display:flex}.stat-row:last-child{border-bottom:none}.stat-label{color:var(--text-secondary);font-size:15px}.stat-value{color:var(--text-primary);font-size:24px;font-weight:700}.perfect-color{color:var(--perfect-color)}.good-color{color:var(--good-color)}.miss-color{color:var(--miss-color)}.result-actions,.pause-actions{gap:16px;display:flex}.action-btn{border:2px solid var(--text-secondary);color:var(--text-primary);cursor:pointer;letter-spacing:1px;background:#141432cc;border-radius:8px;padding:14px 32px;font-size:16px;font-weight:600;transition:all .2s}.action-btn:hover,.action-btn:active{border-color:var(--neon-cyan);box-shadow:0 0 16px #00f0ff66}.action-btn.primary{background:linear-gradient(135deg, var(--neon-purple), var(--neon-pink));border-color:#0000}.action-btn.primary:hover,.action-btn.primary:active{transform:translateY(-2px);box-shadow:0 0 24px #8338ec99}.pause-title{letter-spacing:6px;color:var(--neon-cyan);text-shadow:0 0 20px var(--neon-cyan), 0 0 40px #00f0ff80;margin-bottom:32px;font-size:clamp(36px,8vw,64px);font-weight:900}.parent-title{letter-spacing:4px;color:var(--neon-green);text-shadow:0 0 15px var(--neon-green), 0 0 30px #06ffa566;margin-bottom:24px;font-size:clamp(28px,6vw,42px);font-weight:900}.parent-content{background:#12122acc;border:1px solid #6464c84d;border-radius:16px;width:90%;max-width:480px;max-height:60vh;margin-bottom:24px;padding:24px 32px;overflow-y:auto}.parent-content::-webkit-scrollbar{width:6px}.parent-content::-webkit-scrollbar-thumb{background:#6464c866;border-radius:3px}.loading-text{text-align:center;color:var(--text-secondary);padding:20px}.parent-section{margin-bottom:24px}.parent-section-title{color:var(--neon-cyan);border-bottom:1px solid #00f0ff33;margin-bottom:12px;padding-bottom:8px;font-size:16px;font-weight:700}.parent-stat-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.parent-stat-card{text-align:center;background:#1e1e3c99;border-radius:8px;padding:12px}.parent-stat-num{color:var(--neon-yellow);font-size:28px;font-weight:900}.parent-stat-label{color:var(--text-secondary);margin-top:4px;font-size:12px}.error-word-list{flex-direction:column;gap:8px;display:flex}.error-word-item{border-left:3px solid var(--neon-pink);background:#1e1e3c99;border-radius:6px;justify-content:space-between;align-items:center;padding:8px 12px;display:flex}.error-word-en{color:var(--text-primary);font-weight:600}.error-word-zh{color:var(--text-secondary);font-size:13px}.error-word-count{color:var(--neon-pink);font-size:13px;font-weight:700}.empty-text{text-align:center;color:var(--text-secondary);padding:16px;font-size:14px}#hud{z-index:5;pointer-events:none;width:100%;height:100%;position:absolute;top:0;left:0}.hud-top{pointer-events:auto;justify-content:space-between;align-items:flex-start;padding:20px 24px;display:flex}.hud-score{flex-direction:column;gap:2px;display:flex}.hud-label{color:var(--text-secondary);letter-spacing:3px;font-size:11px}.hud-value{color:var(--neon-cyan);text-shadow:0 0 10px #00f0ff80;font-size:32px;font-weight:900}.hud-btn{border:1px solid var(--text-secondary);width:40px;height:40px;color:var(--text-primary);cursor:pointer;pointer-events:auto;background:#141432cc;border-radius:8px;font-size:16px;transition:all .2s}.hud-btn:hover,.hud-btn:active{border-color:var(--neon-cyan);box-shadow:0 0 12px #00f0ff66}.hud-combo{text-align:center;transition:opacity .3s,transform .3s;position:absolute;top:80px;left:50%;transform:translate(-50%)}.hud-combo.active{opacity:1!important}.combo-number{color:var(--neon-yellow);text-shadow:0 0 15px #ffbe0b99;font-size:48px;font-weight:900;line-height:1;display:block}.combo-label{color:var(--text-secondary);letter-spacing:4px;font-size:14px}.hud-prompt{text-align:center;background:#141432d9;border:1px solid #00f0ff4d;border-radius:12px;min-width:200px;padding:16px 32px;position:absolute;bottom:140px;left:50%;transform:translate(-50%)}.prompt-label{color:var(--text-secondary);letter-spacing:3px;margin-bottom:4px;font-size:12px;display:block}.prompt-text{color:var(--neon-cyan);text-shadow:0 0 10px #00f0ff4d;font-size:24px;font-weight:700}.corner-btn{z-index:8;color:var(--text-secondary);cursor:pointer;background:#14143299;border:1px solid #6464c84d;border-radius:6px;padding:8px 16px;font-size:13px;transition:all .2s;position:absolute;bottom:16px;right:16px}.corner-btn:hover,.corner-btn:active{color:var(--neon-green);border-color:var(--neon-green)}.neon-text{text-shadow:0 0 10px,0 0 20px,0 0 40px}@media (width<=480px){.diff-btn{min-width:100px;padding:20px 24px}.diff-name{font-size:18px}.result-stats{padding:20px 24px}.hud-prompt{padding:12px 24px;bottom:100px}.prompt-text{font-size:20px}}.back-link{z-index:9999;color:#ffffff4d;backdrop-filter:blur(4px);background:#ffffff0d;border:1px solid #ffffff1a;border-radius:6px;align-items:center;gap:6px;padding:6px 10px;font-size:12px;text-decoration:none;transition:all .2s;display:flex;position:fixed;top:12px;left:12px}.back-link:hover{color:#fffc;background:#ffffff1a}