:root{--paper: #F5F7F2;--surface: #FFFFFF;--ink: #131A16;--ink-2: #3D4A43;--muted: #6C7B72;--line: #DBE2D8;--green: #1D6B4B;--green-2: #2C8A63;--green-soft: #E3F0E7;--red: #A23B34;--red-soft: #F7E4E1;--amber: #8F5D10;--radius: 8px;font-family:PingFang SC,Noto Sans SC,system-ui,-apple-system,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--paper);color:var(--ink)}.page{padding:28px 32px 64px;max-width:1120px;margin:0 auto}.page-title{font-size:26px;font-weight:700;margin:0 0 6px;letter-spacing:-.01em}.page-sub{color:var(--muted);margin:0 0 24px;font-size:14px}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.lib-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 16px;cursor:pointer;transition:border-color .15s,transform .15s;display:flex;flex-direction:column;gap:10px;min-height:140px}.lib-card:hover{border-color:var(--green);transform:translateY(-2px)}.lib-card h3{margin:0;font-size:17px}.lib-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}.lib-meta{margin-top:auto;display:flex;gap:12px;font-size:12px;color:var(--muted)}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:26px}.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}.stat .k{font-size:12px;color:var(--muted)}.stat .v{font-size:28px;font-weight:700;margin-top:4px;font-variant-numeric:tabular-nums}.stat .s{font-size:12px;color:var(--muted);margin-top:2px}.practice{min-height:100%;display:flex;flex-direction:column;background:var(--paper)}.practice-top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;border-bottom:1px solid var(--line);background:var(--surface)}.practice-top .title{font-weight:700}.practice-top .meta{color:var(--muted);font-size:13px}.practice-body{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 20px}.prompt-zh{font-size:clamp(22px,3vw,32px);font-weight:600;text-align:center;line-height:1.6;margin-bottom:8px}.prompt-phonetic{color:var(--muted);font-size:14px;margin-bottom:34px;text-align:center}.slots{display:flex;flex-wrap:wrap;gap:10px 14px;justify-content:center;max-width:900px}.slot{display:flex;flex-direction:column;align-items:center;gap:6px}.slot input{width:var(--w, 120px);min-width:40px;border:0;border-bottom:2px solid var(--line);background:transparent;font-size:clamp(20px,2.4vw,28px);text-align:center;padding:6px 2px;color:var(--ink);outline:none;transition:border-color .15s,background .15s,box-shadow .15s;border-radius:3px 3px 0 0}.slot input:focus{border-bottom-color:var(--pos, var(--green));box-shadow:0 14px 24px -20px var(--pos, var(--green))}.slot input.ok{border-bottom-color:var(--green-2);color:var(--green)}.slot input.bad{border-bottom-color:var(--red);background:var(--red-soft)}.slot .pos{font-size:11px;line-height:1;padding:3px 8px;border-radius:999px;white-space:nowrap;color:var(--pos, var(--muted));background:var(--pos-soft, transparent);transition:background .16s ease,color .16s ease}.slot:focus-within .pos{background:var(--pos, var(--green));color:#fff}.practice-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:34px}.practice-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:12px 24px;border-top:1px solid var(--line);background:var(--surface);font-size:13px;color:var(--muted)}.foot-stats{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.foot-stats b{color:var(--ink);font-variant-numeric:tabular-nums}.foot-stats b.bad{color:var(--red)}.foot-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.foot-actions button{display:inline-flex;align-items:center;gap:6px;cursor:pointer;border:1px solid var(--line);background:var(--surface);color:var(--ink-2);border-radius:8px;padding:6px 10px;font-size:13px;font-family:inherit;transition:border-color .15s,color .15s,background .15s}.foot-actions button:hover:not(:disabled){border-color:var(--green);color:var(--green)}.foot-actions button:disabled{opacity:.45;cursor:not-allowed}.foot-actions button.primary{background:var(--green);border-color:var(--green);color:#fff}.foot-actions button.primary:hover:not(:disabled){background:var(--green-2);border-color:var(--green-2);color:#fff}.foot-actions .kbd{margin:0}.foot-actions button.primary .kbd{color:inherit;border-color:#ffffff73;background:#ffffff1f}.kbd{display:inline-block;padding:1px 6px;border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;font-size:11px;background:var(--surface);color:var(--ink-2);margin:0 3px}.word-cards{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:26px;max-width:1000px}.word-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:12px 16px;min-width:110px;text-align:center}.word-card .w{font-size:18px;font-weight:700}.word-card .p{font-size:12px;color:var(--muted);margin-top:2px}.word-card .m{font-size:13px;color:var(--ink-2);margin-top:4px}.mic-wrap{display:flex;flex-direction:column;align-items:center;gap:14px;margin-top:28px}.mic-btn{flex:0 0 auto;width:92px;height:92px;min-width:92px;min-height:92px;aspect-ratio:1 / 1;padding:0;border-radius:50%;border:0;cursor:pointer;line-height:1;background:linear-gradient(145deg,#2c8a63,#1d6b4b);color:#fff;font-size:30px;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 30px #1d6b4b47}.mic-wrap .mic-btn:disabled{opacity:.7;cursor:default}.mic-btn.recording{background:linear-gradient(145deg,#c4564c,#a23b34);animation:pulse 1.2s infinite}@keyframes pulse{0%,to{box-shadow:0 0 #a23b3459}50%{box-shadow:0 0 0 18px #a23b3400}}.mobile-nav{display:none}@media (max-width: 900px){.page{padding:18px 16px 90px}.slots{gap:8px 10px}.slot input{font-size:20px}.mobile-nav{display:flex;position:fixed;left:0;right:0;bottom:0;height:58px;background:var(--surface);border-top:1px solid var(--line);z-index:20;padding-bottom:env(safe-area-inset-bottom)}.mobile-nav a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);text-decoration:none;font-size:11px;gap:3px}.mobile-nav a.active{color:var(--green)}}.confetti{position:fixed;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none;z-index:60}.prompt-zh-hidden{margin-bottom:8px;color:var(--muted);font-size:15px;letter-spacing:.02em}@keyframes answer-in{0%{opacity:0;transform:translateY(6px) scale(.96)}to{opacity:1;transform:none}}.word-cards .word-card{animation:answer-in .28s ease both}.word-card .pos{display:inline-block;font-size:11px;line-height:1;padding:3px 8px;border-radius:999px;margin-bottom:6px}