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b{font-size:13px}.db-advice-block ul,.db-advice-block ol{margin:6px 0 0;padding-left:20px;font-size:13.5px;line-height:1.9}.db-regen{margin-top:14px;padding:5px 14px;font-size:13px}.db-skeleton .db-sk-line{background:linear-gradient(90deg,#e7e3d6 25%,#f1eee4 50%,#e7e3d6 75%) 0 0/200% 100%;border-radius:6px;height:14px;margin:10px 0;animation:1.3s infinite db-shimmer}.db-sk-line.w70{width:70%}.db-sk-line.w90{width:90%}.db-sk-line.w50{width:50%}@keyframes db-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.db-mastery{align-items:center;gap:22px;display:flex}.db-ring-wrap{text-align:center;flex-shrink:0}.db-ring-num{fill:var(--text);font-size:22px;font-weight:700}.db-ring-sub{fill:var(--muted);font-size:11px}.db-ring-label{color:var(--muted);margin-top:2px;font-size:12px}.db-bars{flex:1;min-width:0}.db-bars-title{margin-bottom:8px;font-size:13px;font-weight:600}.db-bars-hint{color:var(--muted);margin-left:8px;font-size:11px;font-weight:400}.db-bar-row{align-items:center;gap:8px;margin:6px 0;font-size:12.5px;display:flex}.db-bar-row.clickable{cursor:pointer;border-radius:6px;padding:2px 4px;transition:background .15s}.db-bar-row.clickable:hover{background:#edf2fa}.db-bar-name{width:72px;color:var(--muted);flex-shrink:0}.db-bar-track{background:#eae6da;border-radius:999px;flex:1;height:10px;overflow:hidden}.db-bar-track i{background:linear-gradient(90deg, var(--primary), 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em{color:var(--primary);margin-left:6px;font-style:normal;font-weight:700}.action-clickable{cursor:pointer}.action-clickable:hover{color:var(--primary)}.action-arrow{color:var(--primary);margin-left:4px;font-size:12px}.db-weekly{flex-wrap:wrap;align-items:center;gap:20px;display:flex}.db-weekly-main{flex-direction:column;align-items:center;min-width:80px;display:flex}.db-weekly-num{color:var(--green);font-size:32px;font-weight:700;line-height:1}.db-weekly-label{color:var(--muted);margin-top:4px;font-size:12px}.db-weekly-compare{font-size:13px}.db-weekly-up{color:var(--green)}.db-weekly-down{color:var(--red)}.db-weekly-flat{color:var(--muted)}.db-weekly-bars{align-items:flex-end;gap:12px;height:60px;margin-left:auto;display:flex}.db-weekly-bar{flex-direction:column;justify-content:flex-end;align-items:center;gap:4px;width:36px;height:100%;display:flex}.db-weekly-bar i{background:linear-gradient(180deg, #4a74c4, var(--primary));border-radius:4px 4px 0 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var(--text);outline-offset:1px}.db-heat-axis-wrap{gap:6px;margin-top:6px;display:flex}.db-heat-axis-pad{flex-shrink:0;width:14px}.db-heat-axis{flex:1;gap:4px;min-width:0;display:grid}.db-heat-axis span{color:var(--muted);white-space:nowrap;font-size:10px;line-height:1.2}.db-heat-axis span.today{color:var(--primary);font-weight:700}.db-heat-legend{color:var(--muted);justify-content:flex-end;align-items:center;gap:4px;margin-top:10px;font-size:11px;display:flex}.db-heat-legend .db-cell{aspect-ratio:auto;width:12px;height:12px}.db-heat-row{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.db-heat-left{flex:0 auto;min-width:0}.db-heat-stats{flex:168px;grid-template-columns:1fr 1fr;gap:8px;min-width:150px;display:grid}.db-heat-stat{border:1px solid var(--border);background:#f7f5ee;border-radius:8px;padding:8px 10px}.db-heat-stat b{color:var(--primary);font-size:16px;line-height:1.3;display:block}.db-heat-stat b 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var(--border);color:var(--muted);border-radius:999px;padding:1px 8px;font-size:11px;display:inline-block}.ad-badge.vip{color:#92400e;background:#fef3c7;border-color:#fcd34d}.ad-badge.admin{border-color:var(--primary);color:var(--primary);background:#dfe7f5}.ad-muted{color:var(--muted);font-size:12px}@media (width<=900px){.ad-table th,.ad-table td{padding:6px}}:root{--bg:#f5f2ea;--card:#fffdf9;--primary:#1e50a2;--primary-deep:#163d7a;--primary-soft:#e9eef9;--text:#262a32;--muted:#6f7683;--border:#e5e0d4;--border-strong:#d2ccb9;--green:#1f8f5f;--red:#c73e3a;--font-display:"Songti SC", "Noto Serif SC", "STSong", "SimSun", serif;color:var(--text);font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box}body{background:linear-gradient(180deg, #ecf0f8 0%, var(--bg) 340px);min-height:100vh;margin:0}.app{max-width:720px;margin:0 auto;padding:24px 16px 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img:hover{transform:scale(1.04)}.thumb-idx{color:#fff;background:#00000080;border-radius:4px;padding:1px 5px;font-size:11px;position:absolute;top:2px;left:2px}.thumb-badge{background:var(--green);color:#fff;border-radius:4px;padding:1px 6px;font-size:12px;font-weight:700;position:absolute;bottom:2px;right:2px}.thumb-remove{color:#fff;cursor:pointer;background:#00000080;border:none;border-radius:50%;justify-content:center;align-items:center;width:18px;height:18px;padding:0;font-size:11px;display:flex;position:absolute;top:2px;right:2px}.actions{gap:8px;margin:16px 0;display:flex}button.primary{color:#fff;background:linear-gradient(180deg, #2a5aa8 0%, var(--primary) 100%);cursor:pointer;border:none;border-radius:11px;flex:1;padding:13px;font-size:16px;font-weight:600;transition:transform .12s,box-shadow .12s,filter .12s;box-shadow:0 2px 6px #163d7a42,inset 0 1px 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var(--border);background:#f7f5ee;border-radius:10px;margin-top:10px;padding:12px}.card-title{align-items:center;gap:8px;margin-bottom:8px;font-size:14px;font-weight:600;display:flex}.badge{color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:2px 10px;font-size:12px;font-weight:400}.stem{margin:0 0 8px;font-size:14px;line-height:1.7}.options{margin:0;padding:0;list-style:none}.options li{border-radius:6px;padding:5px 10px;font-size:14px;line-height:1.6}.options li:nth-child(odd){background:#fff}.options li.hit{color:var(--green);background:#e8f7f0;font-weight:600}.answer-tag{margin-left:8px;font-size:12px}.explanation{white-space:pre-wrap;margin:0;font-family:inherit;font-size:14px;line-height:1.8}.cursor{color:var(--primary);animation:.8s infinite pulse}.stages{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;margin:8px 0 12px;display:flex}.stage{color:var(--muted);align-items:center;gap:5px;font-size:13px;display:flex}.stage .dot{background:var(--border);width:20px;height:20px;color:var(--muted);border-radius:50%;justify-content:center;align-items:center;font-size:11px;display:inline-flex}.stage.active{color:var(--primary);font-weight:600}.stage.active .dot{background:var(--primary);color:#fff;animation:1.2s infinite pulse}.stage.done{color:var(--green)}.stage.done .dot{background:var(--green);color:#fff}.stage-msg{text-align:center;width:100%;color:var(--muted);margin:4px 0 0;font-size:12px}@keyframes pulse{50%{opacity:.55}}.result-bar{border-top:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:8px;margin-top:10px;padding-top:10px;display:flex}.feedback-inline{color:var(--muted);align-items:center;gap:6px;font-size:13px;display:flex}.feedback-inline button{border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;padding:0;font-size:14px;font-weight:600;display:inline-flex}.feedback-inline button.selected{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}.feedback-inline button.submit{background:var(--primary);color:#fff;border:none;width:auto;padding:0 14px}.feedback-inline button:hover{border-color:var(--primary)}.thanks{color:var(--green);font-size:13px}.kg-anchors{flex-wrap:wrap;align-items:center;gap:6px;margin-top:10px;display:flex}.kg-label{color:var(--muted);font-size:12px}.kg-chip{color:var(--primary);background:var(--primary-soft);white-space:nowrap;border-radius:999px;padding:3px 10px;font-size:12px;font-weight:500}.followup{border-top:1px solid var(--border);margin-top:10px;padding-top:10px}.chat-log{flex-direction:column;gap:8px;max-height:320px;margin-bottom:10px;display:flex;overflow-y:auto}.chat-msg{max-width:88%}.chat-msg pre{white-space:pre-wrap;word-break:break-word;margin:0;font-family:inherit;font-size:13px;line-height:1.6}.chat-msg.user{background:var(--primary);color:#fff;border-radius:12px 12px 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16px;font-size:14px}.first-use-never{color:var(--muted);justify-content:center;align-items:center;gap:6px;margin-top:12px;font-size:12px;display:flex}.anon-banner{background:#fff8e8;border:1px solid #f5d488;border-radius:8px;align-items:center;gap:8px;margin:0 0 12px;padding:8px 12px;font-size:13px;display:flex}.anon-banner-icon{color:#f5a623;font-size:16px}.anon-banner-text{color:#5a4a1a;flex:1}.anon-banner-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:6px;flex-shrink:0;padding:4px 12px;font-size:13px}.onboarding-card{border:1px solid var(--border-strong);background:linear-gradient(135deg,#e9effa 0%,#f6f3e8 100%);border-radius:16px;margin-bottom:16px;padding:16px 18px}.onboarding-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.onboarding-title{color:var(--text);font-size:15px;font-weight:600}.onboarding-close{cursor:pointer;color:var(--muted);background:0 0;border:none;border-radius:4px;padding:2px 6px;font-size:16px;transition:background .15s}.onboarding-close:hover{color:var(--text);background:#0000000f}.onboarding-grid{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;display:grid}.onboarding-item{background:var(--card);border:1px solid var(--border);cursor:pointer;border-radius:10px;align-items:flex-start;gap:12px;padding:14px 16px;transition:all .15s;display:flex}.onboarding-item:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 6px 16px #1e50a221}.onboarding-icon{flex-shrink:0;font-size:24px;line-height:1.2}.onboarding-name{color:var(--text);font-size:14px;font-weight:600}.onboarding-desc{color:var(--muted);margin-top:4px;font-size:12.5px;line-height:1.65}.onboarding-footer{margin-top:10px}.onboarding-tip{color:var(--muted);font-size:12px}.anon-expiry-banner{background:#fff8e8;border:1px solid #f5d488;border-radius:8px;align-items:center;gap:8px;margin:0 0 12px;padding:8px 12px;font-size:13px;display:flex}.anon-expiry-banner.urgent{background:#fef2f2;border-color:#fca5a5;animation:1.5s infinite expiry-pulse}.anon-expiry-banner.urgent .anon-expiry-text{color:#991b1b}.anon-expiry-text{color:#5a4a1a;flex:1}.anon-expiry-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:6px;flex-shrink:0;padding:4px 12px;font-size:13px}@keyframes expiry-pulse{0%,to{box-shadow:0 0 #ef44444d}50%{box-shadow:0 0 0 4px #ef444400}}.src-tag.essay{background:var(--primary-soft);color:var(--primary)}.essay-fix{background:#f7f5ee;border-radius:8px;margin:8px 0;padding:8px 10px}.essay-stem{flex-wrap:wrap;align-items:center;gap:6px;line-height:1.6;display:flex}.essay-stem .grammar-orig,.essay-stem .grammar-fixed{white-space:normal;word-break:break-word}::selection{background:#1e50a229}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}@media (width<=560px){.app{padding:16px 12px 56px}.brand-seal{width:30px;height:30px}h1{font-size:20px}.account-name{max-width:76px}.tab{padding:8px 11px 10px;font-size:13.5px}}