:root{font-family:Microsoft YaHei,PingFang SC,Hiragino Sans GB,sans-serif;line-height:1.5;font-weight:400;--primary-color: #4a90e2;--secondary-color: #f5a623;--text-light: rgba(255, 255, 255, .9);--text-dim: rgba(255, 255, 255, .6);--bg-dark: rgba(0, 0, 20, .8);--bg-panel: rgba(0, 0, 30, .9);--border-glow: rgba(74, 144, 226, .3)}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;overflow:hidden;background:linear-gradient(to bottom,#000428,#004e92);font-family:inherit}#app{position:relative;width:100vw;height:100vh}#starlight-canvas{position:absolute;top:0;left:0;width:100%;height:100%;display:block;cursor:grab}#starlight-canvas:active{cursor:grabbing}#ui-overlay{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:100}.hidden{display:none!important}#lyrics-display{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--bg-panel);border:1px solid var(--border-glow);border-radius:15px;padding:20px 30px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);pointer-events:auto;animation:fadeInScale .5s ease-out}#lyrics-text{color:var(--text-light);font-size:18px;text-align:center;margin:0;text-shadow:0 0 10px rgba(255,255,255,.3)}#echo-wall{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--bg-panel);border:1px solid var(--border-glow);border-radius:20px;padding:30px;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);pointer-events:auto;min-width:400px;max-width:500px;animation:fadeInScale .5s ease-out}.echo-wall-content h3{color:var(--text-light);margin-bottom:10px;text-align:center;font-size:20px}.echo-wall-content p{color:var(--text-dim);margin-bottom:20px;text-align:center;font-size:14px}#message-input{width:100%;height:120px;background:#ffffff1a;border:1px solid var(--border-glow);border-radius:10px;padding:15px;color:var(--text-light);font-family:inherit;font-size:14px;resize:none;margin-bottom:20px}#message-input::placeholder{color:var(--text-dim)}#message-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 15px #4a90e24d}button{background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));border:none;border-radius:25px;padding:12px 24px;color:#fff;font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;transition:all .3s ease;margin:5px;pointer-events:auto}button:hover{transform:translateY(-2px);box-shadow:0 5px 15px #4a90e266}button:active{transform:translateY(0)}#submit-message{width:100%;margin-bottom:10px}#close-echo-wall{background:#fff3;width:100%}#message-display{position:absolute;top:20px;right:20px;background:var(--bg-panel);border:1px solid var(--border-glow);border-radius:15px;padding:15px 20px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);pointer-events:auto;max-width:300px;animation:fadeInSlide .5s ease-out}.message-content p{color:var(--text-light);font-size:14px;margin:0 0 10px;line-height:1.4}.message-content span{color:var(--text-dim);font-size:12px}#controls{position:absolute;bottom:30px;right:30px;display:flex;flex-direction:column;gap:10px}#controls button{width:50px;height:50px;border-radius:50%;font-size:20px;padding:0;margin:0;display:flex;align-items:center;justify-content:center}#help-panel{position:absolute;bottom:100px;right:30px;background:var(--bg-panel);border:1px solid var(--border-glow);border-radius:15px;padding:20px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);pointer-events:auto;min-width:250px;animation:fadeInSlide .5s ease-out}.help-content h3{color:var(--text-light);margin-bottom:15px;font-size:16px}.help-content h4{color:var(--text-light);margin:15px 0 10px;font-size:14px}.help-content ul{list-style:none;margin-bottom:15px}.help-content li{color:var(--text-dim);font-size:13px;margin-bottom:8px;line-height:1.4}#close-help{width:100%;background:#fff3}.loading-screen{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(to bottom,#000428,#004e92);display:flex;align-items:center;justify-content:center;z-index:1000}.loading-content{text-align:center;color:var(--text-light)}.loading-spinner{width:50px;height:50px;border:3px solid rgba(255,255,255,.3);border-top:3px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 20px}.loading-content p{font-size:16px;margin:0}@keyframes fadeInScale{0%{opacity:0;transform:translate(-50%,-50%) scale(.8)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}@keyframes fadeInSlide{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 768px){#echo-wall{min-width:90vw;max-width:90vw;padding:20px}#controls{bottom:20px;right:20px}#help-panel{bottom:80px;right:20px;min-width:200px}#message-display{top:20px;right:20px;max-width:250px}}