:root{--primary: #2563eb;--primary-dark: #1e40af;--primary-light: #dbeafe;--success: #16a34a;--success-light: #dcfce7;--warning: #d97706;--warning-light: #fef3c7;--danger: #dc2626;--danger-light: #fee2e2;--text: #0f172a;--text-2: #475569;--text-3: #94a3b8;--bg: #f1f5f9;--card: #ffffff;--border: #e2e8f0;--radius: 16px;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 4px 14px rgba(15, 23, 42, .05)}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}#app{min-height:100vh}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit;font-size:16px}img{max-width:100%}.shell{min-height:100vh}.page{max-width:560px;margin:0 auto;padding:76px 16px 96px}.page.wide{max-width:1080px}.page-top{position:fixed;top:0;left:0;right:0;z-index:30;background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}.page-top-inner{max-width:560px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;gap:12px}.page-top-inner.wide{max-width:1080px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--primary-dark)}.brand .logo{width:34px;height:34px;border-radius:10px;flex:0 0 auto;background:linear-gradient(135deg,#2563eb,#7c3aed);color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:800}.back-btn{border:none;background:var(--primary-light);color:var(--primary-dark);width:34px;height:34px;border-radius:10px;font-size:18px;display:flex;align-items:center;justify-content:center;flex:0 0 auto}.top-nav{margin-left:auto;display:none;gap:6px}.top-nav a{padding:7px 14px;border-radius:10px;color:var(--text-2);font-weight:600;font-size:14px;transition:all .15s}.top-nav a.router-link-active{background:var(--primary);color:#fff}@media (min-width: 760px){.top-nav{display:flex}.page{padding-top:86px}}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:30;display:flex;background:#fff;border-top:1px solid var(--border);padding:6px 4px calc(8px + env(safe-area-inset-bottom));box-shadow:0 -4px 16px #0f172a0f}.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;color:var(--text-3);font-size:11px;padding:4px 0;border-radius:12px}.bottom-nav a .ic{font-size:21px;line-height:1.2}.bottom-nav a.router-link-active{color:var(--primary)}.bottom-nav a.router-link-active .ic{transform:translateY(-1px)}@media (min-width: 760px){.bottom-nav{display:none}}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.card+.card{margin-top:12px}.card-title{font-size:15px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:8px}.muted{color:var(--text-2)}.small{font-size:13px}.hint{color:var(--text-3);font-size:12px}.grid{display:grid;gap:12px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}@media (min-width: 760px){.grid-2{grid-template-columns:repeat(4,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-cards{grid-template-columns:repeat(2,1fr)}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:12px;padding:12px 20px;font-size:15px;font-weight:700;color:#fff;background:var(--primary);transition:opacity .15s,transform .1s}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.block{width:100%}.btn.secondary{background:var(--primary-light);color:var(--primary-dark)}.btn.ghost{background:transparent;color:var(--text-2);border:1px solid var(--border)}.btn.success{background:var(--success)}.btn.danger{background:var(--danger)}.btn.sm{padding:7px 12px;font-size:13px;border-radius:10px}.chip{display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;background:var(--primary-light);color:var(--primary-dark)}.chip.green{background:var(--success-light);color:var(--success)}.chip.amber{background:var(--warning-light);color:var(--warning)}.chip.red{background:var(--danger-light);color:var(--danger)}.chip.gray{background:#f1f5f9;color:var(--text-2)}.bar{height:8px;background:#e2e8f0;border-radius:999px;overflow:hidden}.bar>i{display:block;height:100%;background:linear-gradient(90deg,#2563eb,#7c3aed);border-radius:999px;transition:width .4s}.bar.green>i{background:linear-gradient(90deg,#16a34a,#22c55e)}.field{margin-bottom:14px}.field label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:6px}.input,.textarea{width:100%;border:1.5px solid var(--border);border-radius:12px;padding:11px 14px;background:#fff;color:var(--text);outline:none;transition:border .15s}.input:focus,.textarea:focus{border-color:var(--primary)}.textarea{min-height:120px;resize:vertical;line-height:1.7}.tag-row{display:flex;gap:8px;flex-wrap:wrap}.tag{padding:7px 14px;border-radius:999px;border:1.5px solid var(--border);background:#fff;font-size:13px;font-weight:600;color:var(--text-2);transition:all .15s}.tag.active{background:var(--primary);border-color:var(--primary);color:#fff}.row{display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--border);cursor:pointer}.row:last-child{border-bottom:none}.row .body{flex:1;min-width:0}.row .title{font-weight:700;font-size:15px}.row .sub{font-size:13px;color:var(--text-2)}.ib{width:44px;height:44px;border-radius:12px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:22px}.ib.blue{background:var(--primary-light)}.ib.green{background:var(--success-light)}.ib.amber{background:var(--warning-light)}.ib.purple{background:#ede9fe}.ib.red{background:var(--danger-light)}.empty{text-align:center;color:var(--text-3);padding:40px 0;font-size:14px}.flex{display:flex;align-items:center;gap:8px}.spacer{flex:1}.text-center{text-align:center}.divider{height:1px;background:var(--border);margin:12px 0}.stat-num{font-size:26px;font-weight:800;color:var(--primary-dark)}.toast-fix{font-size:14px}.flame{color:#f97316}.article-box{background:#fffdf5;border:1px solid #fde68a;border-radius:12px;padding:14px;font-size:14px;line-height:1.9;white-space:pre-wrap}.model-box{background:var(--success-light);border-radius:12px;padding:14px;font-size:14px;line-height:1.9;white-space:pre-wrap}.flash-card{background:#fff;border-radius:20px;box-shadow:var(--shadow);padding:30px 22px;text-align:center;min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}.flash-word{font-size:40px;font-weight:800}.flash-phon{color:var(--text-3)}.flash-mean{font-size:20px;font-weight:700;color:var(--primary-dark);margin-top:6px}.flash-ex{color:var(--text-2);font-style:italic;margin-top:8px}.panel-rings{display:flex;gap:16px;flex-wrap:wrap;align-items:stretch}.ring{position:relative;width:88px;height:88px;flex:0 0 auto}.ring svg{transform:rotate(-90deg)}.ring .mid{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.ring .num{font-size:18px;font-weight:800}.ring .lb{font-size:10px;color:var(--text-3)}