.app-header[data-v-d2bce33f]{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--grad-header);color:#fff;box-shadow:var(--sh-1);position:sticky;top:0;z-index:30;transition:background var(--d-fast)}.app-header.is-companion[data-v-d2bce33f]{background:var(--grad-companion)}.header-left[data-v-d2bce33f]{display:flex;gap:4px;flex-shrink:0}.header-right[data-v-d2bce33f]{display:flex;align-items:center;gap:8px;flex-shrink:0;margin-left:4px}.icon-btn[data-v-d2bce33f]{width:34px;height:34px;border:none;background:#ffffff38;color:#fff;border-radius:50%;font-size:22px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background var(--d-fast)}.icon-btn[data-v-d2bce33f]:active{background:#fff6}.avatar[data-v-d2bce33f]{width:38px;height:38px;border-radius:50%;background:#ffffff40;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}.titles[data-v-d2bce33f]{flex:1;min-width:0}.title[data-v-d2bce33f]{margin:0;font-size:17px;font-weight:800;letter-spacing:.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.subtitle[data-v-d2bce33f]{margin:1px 0 0;font-size:12px;opacity:.9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.exit-companion[data-v-d2bce33f]{flex-shrink:0;border:none;cursor:pointer;background:#ffffff47;color:#fff;font-size:12px;font-weight:700;padding:7px 12px;border-radius:999px;transition:background var(--d-fast)}.exit-companion[data-v-d2bce33f]:active{background:#ffffff73}.offline-banner[data-v-eeb364a8]{background:linear-gradient(135deg,#ffd28a,#ffb07c);color:#7a4a1f;font-size:13px;font-weight:600;padding:8px 16px;text-align:center;display:flex;align-items:center;justify-content:center;gap:6px}.banner-enter-active[data-v-eeb364a8],.banner-leave-active[data-v-eeb364a8]{transition:all var(--d-base)}.banner-enter-from[data-v-eeb364a8],.banner-leave-to[data-v-eeb364a8]{opacity:0;transform:translateY(-100%)}.tabbar[data-v-8ece6a96]{display:flex;gap:4px;padding:8px 12px;background:#fff;border-top:1px solid var(--c-border);position:sticky;bottom:0;z-index:30}.tab[data-v-8ece6a96]{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 0;border-radius:var(--r-md);color:var(--c-text-sub);font-size:11px;font-weight:600;transition:all var(--d-fast)}.tab .ico[data-v-8ece6a96]{width:22px;height:22px}.tab.active[data-v-8ece6a96]{color:var(--c-primary-deep);background:var(--c-bubble-mentor)}.empty-state[data-v-7fc8c527]{text-align:center;padding:40px 24px;color:var(--c-text-sub)}.illus[data-v-7fc8c527]{display:inline-block}.title[data-v-7fc8c527]{font-size:15px;font-weight:700;color:var(--c-text);margin:14px 0 4px}.desc[data-v-7fc8c527]{font-size:13px;margin:0 0 14px}.act[data-v-7fc8c527]{background:var(--grad-main);color:#fff;font-weight:600;font-size:14px;padding:9px 20px;border-radius:var(--r-pill);box-shadow:var(--sh-2)}.drawer-root[data-v-494a7ad2]{position:fixed;top:0;right:0;bottom:0;left:0;z-index:120}.mask[data-v-494a7ad2]{position:absolute;top:0;right:0;bottom:0;left:0;background:#4a3f3a59;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.panel[data-v-494a7ad2]{position:absolute;top:0;left:0;bottom:0;width:78%;max-width:320px;background:var(--c-bg);display:flex;flex-direction:column;box-shadow:8px 0 28px #ff9a9e38;border-radius:0 var(--r-lg) var(--r-lg) 0;padding-top:env(safe-area-inset-top,0px)}.d-head[data-v-494a7ad2]{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 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var(--d-fast)}.s-item.active[data-v-494a7ad2]{border-color:var(--c-primary);background:var(--c-bubble-mentor)}.s-emoji[data-v-494a7ad2]{width:18px;height:18px;flex-shrink:0}.s-main[data-v-494a7ad2]{flex:1;min-width:0}.s-title[data-v-494a7ad2]{margin:0;font-size:14px;font-weight:700;color:var(--c-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.s-sub[data-v-494a7ad2]{margin:2px 0 0;font-size:11px;color:var(--c-text-sub);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.s-del[data-v-494a7ad2]{font-size:14px;opacity:.5;padding:4px;flex-shrink:0}.s-del[data-v-494a7ad2]:hover{opacity:1}.d-foot[data-v-494a7ad2]{padding:10px 16px calc(12px + env(safe-area-inset-bottom,0px));font-size:11px;color:var(--c-text-sub);text-align:center;border-top:1px solid var(--c-border)}.drawer-enter-active .panel[data-v-494a7ad2],.drawer-leave-active .panel[data-v-494a7ad2]{transition:transform var(--d-base) var(--ease-out)}.drawer-enter-active .mask[data-v-494a7ad2],.drawer-leave-active .mask[data-v-494a7ad2]{transition:opacity var(--d-base)}.drawer-enter-from .panel[data-v-494a7ad2],.drawer-leave-to .panel[data-v-494a7ad2]{transform:translate(-100%)}.drawer-enter-from .mask[data-v-494a7ad2],.drawer-leave-to .mask[data-v-494a7ad2]{opacity:0}.app-shell[data-v-7cb60c5d]{display:flex;flex-direction:column;height:100%}.app-main[data-v-7cb60c5d]{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;position:relative}.toast-layer[data-v-8ff5f18a]{position:fixed;top:12px;left:0;right:0;z-index:200;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none}.toast[data-v-8ff5f18a]{max-width:90%;padding:10px 18px;border-radius:var(--r-pill);background:#4a3f3aeb;color:#fff;font-size:14px;box-shadow:var(--sh-2);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.toast.warn[data-v-8ff5f18a]{background:#ff9a6b}.toast.error[data-v-8ff5f18a]{background:var(--c-danger)}.toast-enter-active[data-v-8ff5f18a],.toast-leave-active[data-v-8ff5f18a]{transition:all var(--d-base)}.toast-enter-from[data-v-8ff5f18a],.toast-leave-to[data-v-8ff5f18a]{opacity:0;transform:translateY(-12px)}.modal-mask[data-v-64c0d226]{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:#4a3f3a59;display:flex;align-items:center;justify-content:center;padding:24px;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.modal-card[data-v-64c0d226]{background:#fff;border-radius:var(--r-lg);padding:24px;max-width:320px;width:100%;text-align:center;box-shadow:var(--sh-2)}.modal-title[data-v-64c0d226]{margin:0 0 10px;font-size:17px}.modal-body[data-v-64c0d226]{margin:0 0 20px;color:var(--c-text-sub);font-size:15px}.modal-actions[data-v-64c0d226]{display:flex;gap:12px}.m-btn[data-v-64c0d226]{flex:1;padding:11px;border-radius:var(--r-pill);font-weight:600;font-size:15px}.m-btn.primary[data-v-64c0d226]{background:var(--grad-main);color:#fff}.m-btn.ghost[data-v-64c0d226]{background:#fff;border:1.5px solid var(--c-border);color:var(--c-text)}.modal-enter-active[data-v-64c0d226],.modal-leave-active[data-v-64c0d226]{transition:opacity var(--d-base)}.modal-enter-from[data-v-64c0d226],.modal-leave-to[data-v-64c0d226]{opacity:0}.page-enter-active,.page-leave-active{transition:opacity var(--d-base),transform var(--d-base)}.page-enter-from{opacity:0;transform:translateY(8px)}.page-leave-to{opacity:0;transform:translateY(-8px)}.base-icon[data-v-70325802]{display:inline-block;vertical-align:middle}.mascot[data-v-0381eae0]{display:block}:root{--c-primary: #FFB07C;--c-primary-deep: #FF9466;--c-accent: #FF9A9E;--grad-main: linear-gradient(135deg, #FFB07C 0%, #FF9A9E 100%);--grad-user-bubble: linear-gradient(135deg, #C6B5FF 0%, #E4C1F9 100%);--grad-header: linear-gradient(120deg, #FFC89B 0%, #FFB0B4 100%);--c-companion: #9D8DF1;--grad-companion: linear-gradient(120deg, #B7A9F5 0%, #E0C3FC 100%);--c-bubble-companion: #F3EEFF;--c-bg: #FFF9F3;--c-surface: #FFFFFF;--c-bubble-mentor: #FFF4E8;--c-text: #4A3F3A;--c-text-sub: #9A8C85;--c-border: #F0E2D6;--c-danger: #FF6B6B;--c-like: #FF8A5B;--c-dislike: #A8B3C4;--c-ok: #7BD389;--c-sub-math: #7EC8E3;--c-sub-chinese: #F6A5C0;--c-sub-english: #FFD166;--c-sub-physics: #9D8DF1;--c-sub-chemistry: #7BD389;--c-sub-biology: #5FC9A5;--c-sub-history: #D8A47F;--c-sub-geography: #79C0A8;--c-sub-politics: #F49097;--c-sub-other: #C9C0BB;--r-sm: 12px;--r-md: 20px;--r-lg: 28px;--r-pill: 999px;--sh-1: 0 2px 8px rgba(255, 154, 158, .1);--sh-2: 0 8px 24px rgba(255, 154, 158, .16);--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 24px;--sp-6: 32px;--d-fast: .16s;--d-base: .24s;--d-slow: .42s;--ease-pop: cubic-bezier(.34, 1.56, .64, 1);--ease-out: cubic-bezier(.22, .61, .36, 1);--header-h: 56px;--tabbar-h: 62px;--max-w: 720px;--font-round: "Noto Sans SC Rounded", "Noto Sans SC", "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei UI", "Hiragino Sans GB", system-ui, -apple-system, sans-serif}@media (prefers-reduced-motion: reduce){:root{--d-fast: 0ms;--d-base: 0ms;--d-slow: 0ms}}*,*:before,*:after{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{font-family:var(--font-round);color:var(--c-text);background:var(--c-bg);letter-spacing:.02em;font-weight:500;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-size:16px;line-height:1.6}#app{max-width:var(--max-w);margin:0 auto;background:var(--c-bg);position:relative;display:flex;flex-direction:column;min-height:100%;box-shadow:0 0 40px #ff9a9e14}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}input,textarea{font-family:inherit;color:inherit}a{color:inherit;text-decoration:none}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:#ead9cc;border-radius:999px}::-webkit-scrollbar-track{background:transparent}::selection{background:#ffd9c2;color:#6b4a36}.safe-bottom{padding-bottom:env(safe-area-inset-bottom,0)}.safe-top{padding-top:env(safe-area-inset-top,0)}@keyframes bubble-pop{0%{opacity:0;transform:scale(.86) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.bubble-pop{animation:bubble-pop var(--d-base) var(--ease-pop) both}@keyframes planet-spin{to{transform:rotate(360deg)}}.planet-spin{animation:planet-spin 1.6s linear infinite}@keyframes orbit-spin{to{transform:rotate(-360deg)}}.orbit-spin{animation:orbit-spin 2.4s linear infinite}@keyframes dots-breathe{0%,80%,to{opacity:.25}40%{opacity:1}}.dots-breathe{animation:dots-breathe 1.2s infinite}@keyframes banner-slide{0%{transform:translateY(-100%)}to{transform:translateY(0)}}.banner-slide{animation:banner-slide var(--d-base) var(--ease-out) both}.ring-fill{transition:stroke-dashoffset .6s var(--ease-out)}@keyframes press-scale{0%{transform:scale(1)}50%{transform:scale(.96)}to{transform:scale(1)}}.press-scale:active{animation:press-scale .16s var(--ease-out)}@keyframes shake-error{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}.shake-error{animation:shake-error .28s ease-in-out}@keyframes heat-fade-in{0%{opacity:0;transform:scale(.6)}to{opacity:1;transform:scale(1)}}.heat-fade-in{animation:heat-fade-in .3s var(--ease-out) both}@keyframes page-fade{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.page-fade-enter-active{animation:page-fade var(--d-base) var(--ease-out)}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.fade-in{animation:fade-in var(--d-base) var(--ease-out) both}@keyframes floaty{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.floaty{animation:floaty 3s ease-in-out infinite}@keyframes pop-bounce{0%{transform:scale(1)}40%{transform:scale(1.32)}70%{transform:scale(.92)}to{transform:scale(1)}}.pop-bounce{animation:pop-bounce .34s var(--ease-pop)}@keyframes drawer-slide{0%{transform:translate(-100%)}to{transform:translate(0)}}.drawer-slide{animation:drawer-slide var(--d-base) var(--ease-out) both}@keyframes sheet-rise{0%{transform:translateY(100%)}to{transform:translateY(0)}}.sheet-rise{animation:sheet-rise var(--d-base) var(--ease-out) both}@keyframes mask-fade{0%{opacity:0}to{opacity:1}}.mask-fade{animation:mask-fade var(--d-fast) linear both}@keyframes shimmer{0%{background-position:-240px 0}to{background-position:240px 0}}.shimmer{background:linear-gradient(90deg,#fff4e8,#fffdf9,#fff4e8);background-size:480px 100%;animation:shimmer 1.4s linear infinite}.markdown-body .katex{font-size:1.02em;color:var(--c-text)}.markdown-body .katex-display{margin:10px 0;padding:6px 10px;background:#fffdfb;border-radius:var(--r-sm);overflow-x:auto;overflow-y:hidden}.markdown-body code{background:#fff0e6;color:#c2562e;padding:1px 6px;border-radius:6px;font-size:.9em;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace}.markdown-body pre{background:#2e2622;color:#ffe9d6;padding:12px 14px;border-radius:var(--r-sm);overflow-x:auto;font-size:.86em}.markdown-body pre code{background:none;color:inherit;padding:0}.markdown-body blockquote{margin:8px 0;padding:6px 14px;border-left:3px solid var(--c-primary);background:#fff4ea;border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--c-text-sub)}.markdown-body a{color:var(--c-primary-deep);text-decoration:underline}