:root{--ink: #2c3e50;--vermilion: #c0392b;--paper: #f4f1ea;--border: #dcd3b6}body{margin:0;background-color:#e5e5e5;background-image:url(https://www.transparenttextures.com/patterns/paper-fibers.png);font-family:Kaiti,STKaiti,楷体,serif;color:var(--ink);overflow:hidden}.app-container{max-width:480px;height:100vh;margin:0 auto;background:var(--paper);display:flex;flex-direction:column;position:relative;box-shadow:0 0 40px #0000001a;border-left:1px solid var(--border);border-right:1px solid var(--border)}.app-header{padding:15px 20px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border)}.cloud-badge{font-size:12px;color:#7f8c8d;display:flex;align-items:center;gap:4px}.stats-bar{display:flex;gap:10px;align-items:center}.stat-item{background:#ffffff80;padding:4px 10px;border-radius:15px;display:flex;align-items:center;gap:5px;font-weight:700;font-size:14px;border:1px solid var(--border)}.hearts{gap:2px;background:none;border:none}.icon-ink{color:var(--ink)}.icon-gold{color:#d35400}.content-area{flex:1;display:flex;align-items:center;justify-content:center;padding:20px}.card{width:100%;text-align:center;padding:20px}.seal-svg{width:80px;height:80px;margin:0 auto 20px;filter:drop-shadow(2px 2px 2px rgba(0,0,0,.1))}h1{font-size:2.2rem;margin:0;letter-spacing:4px;color:var(--ink)}.idiom-display{display:flex;justify-content:center;gap:12px;margin:40px 0}.char-box{width:60px;height:70px;border:2px solid var(--ink);display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:700;background:#fff;position:relative;box-shadow:3px 3px 0 var(--border)}.char-box.blank{border-color:var(--vermilion);color:var(--vermilion);background:#fff5f5}.idiom-display.wrong{animation:shake .4s}.idiom-display.correct .char-box.blank{background:#f0fff4;color:#27ae60;border-color:#27ae60}.options-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin-bottom:30px}.option-btn{background:#fff;border:1px solid var(--ink);padding:15px;font-size:24px;cursor:pointer;font-family:inherit;transition:all .2s;box-shadow:2px 2px 0 var(--border)}.option-btn:hover{background:var(--ink);color:#fff}.primary-btn{background:var(--ink);color:#fff;border:none;padding:12px 30px;font-size:18px;border-radius:4px;cursor:pointer;display:inline-flex;align-items:center;gap:10px;font-family:inherit}.hint-btn{background:none;border:1px dashed var(--ink);padding:6px 12px;font-size:12px;cursor:pointer;color:#7f8c8d}.hint-btn:disabled{opacity:.5;cursor:not-allowed}.shop-section{background:#ede9df;padding:15px 20px;border-top:2px solid var(--ink)}.shop-header{font-size:13px;margin-bottom:10px;display:flex;align-items:center;gap:6px;color:#5d6d7e}.shop-items{display:flex;gap:10px;overflow-x:auto;padding-bottom:5px}.shop-item{flex:0 0 100px;background:#fff;border:1px solid var(--border);padding:8px;display:flex;align-items:center;gap:8px;cursor:pointer;text-align:left}.shop-item.active{border:2px solid var(--vermilion)}.shop-item.unlocked{background:#fdfcf9}.item-dot{width:12px;height:12px;border-radius:50%}.item-name{font-size:12px;font-weight:700}.item-price{font-size:10px;color:#7f8c8d}.particle{position:fixed;width:12px;height:12px;border-radius:50%;pointer-events:none;z-index:100;filter:blur(1px)}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-8px)}75%{transform:translate(8px)}}.loading-screen{height:100vh;display:flex;align-items:center;justify-content:center;background:var(--paper);font-size:18px}