:root{--primary:#4f46e5;--primary-light:#6366f1;--bg-color:#f8fafc;--chat-bg:#fff;--text-main:#1e293b;--text-muted:#64748b;--border-light:#f1f5f9;--border:#e2e8f0;--user-bubble:linear-gradient(135deg, #4f46e5, #6366f1);--ai-bubble:#fff;--shadow-sm:0 4px 12px #0000000d;--shadow-md:0 8px 24px #4f46e51f}*{box-sizing:border-box;margin:0;padding:0}body{color:var(--text-main);-webkit-font-smoothing:antialiased;background-color:#e2e8f0;font-family:Inter,-apple-system,BlinkMacSystemFont,PingFang SC,Helvetica Neue,STHeiti,Microsoft Yahei,sans-serif}.chat-app{background-color:var(--bg-color);flex-direction:column;width:100%;max-width:480px;height:100dvh;margin:0 auto;display:flex;position:relative;overflow-x:hidden;box-shadow:0 0 40px #0000001a}.chat-header{padding:calc(14px + env(safe-area-inset-top)) 20px 14px 20px;-webkit-backdrop-filter:blur(16px);z-index:10;background:#ffffffd9;border-bottom:1px solid #e2e8f099;align-items:center;gap:12px;display:flex;position:sticky;top:0}.header-icon-bg{width:36px;height:36px;box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#4f46e5,#8b5cf6);border-radius:10px;justify-content:center;align-items:center;display:flex}.header-info{flex-direction:column;gap:2px;display:flex}.header-info h1{color:var(--text-main);letter-spacing:-.2px;font-size:1rem;font-weight:700}.custom-model-selector{position:relative}.model-trigger{cursor:pointer;width:fit-content;color:var(--primary);background:#4f46e514;border-radius:6px;align-items:center;gap:6px;padding:4px 10px 4px 6px;font-size:.75rem;font-weight:600;transition:background .2s;display:flex}.model-trigger-icon{color:#fff;border-radius:4px;justify-content:center;align-items:center;width:16px;height:16px;font-size:.6rem;font-weight:700;display:flex}.model-trigger:active{background:#4f46e526}.model-chevron{opacity:.8}.dropdown-overlay{z-index:90;position:fixed;inset:0}.model-dropdown-menu{border:1px solid var(--border-light);z-index:100;background:#fff;border-radius:12px;min-width:220px;animation:.2s cubic-bezier(.16,1,.3,1) forwards dropdownFade;position:absolute;top:calc(100% + 8px);left:0;overflow:hidden;box-shadow:0 10px 40px #00000026}@keyframes dropdownFade{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.model-option{cursor:pointer;border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;padding:12px 16px;transition:background .2s;display:flex}.model-option:last-child{border-bottom:none}.model-option:hover{background:#f8fafc}.model-option-text{flex-direction:column;gap:4px;display:flex}.model-list-icon{color:#fff;border-radius:6px;justify-content:center;align-items:center;width:22px;height:22px;font-size:.8rem;font-weight:700;display:flex}.m-name{color:var(--text-main);font-size:.85rem;font-weight:600}.m-tag{color:var(--text-muted);margin-left:30px;font-size:.7rem}.main-content{flex-direction:column;flex:1;display:flex;overflow:hidden}.chat-app.split-mode .main-content{flex-direction:column}.chat-app.split-mode .paper-pane{border-bottom:1px solid var(--border);background:#f8fafc;flex-direction:column;flex:1;min-height:0;display:flex}.chat-app.split-mode .chat-pane{flex:1;min-height:0}.paper-header{border-bottom:1px solid var(--border-light);z-index:5;background:#fff;justify-content:space-between;align-items:center;padding:12px 20px;display:flex}.badge{color:#7c3aed;background:#8b5cf61a;border-radius:6px;align-items:center;gap:6px;padding:4px 10px;font-size:.75rem;font-weight:600;display:flex}.export-btn{border:1px solid var(--primary);color:var(--primary);cursor:pointer;background:#fff;border-radius:16px;align-items:center;gap:4px;padding:6px 12px;font-size:.8rem;font-weight:600;transition:all .2s;display:flex}.export-btn:hover{background:var(--primary);color:#fff}.paper-body{flex:1;padding:20px;overflow-y:auto}.chat-pane{flex-direction:column;flex:1;display:flex;overflow:hidden}.chat-new-user-offer{color:#9a3412;cursor:pointer;text-align:left;background:#fff7ed;border:1px solid #fed7aa;border-radius:14px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;margin:12px 16px 0;padding:11px 12px;display:grid;box-shadow:0 8px 22px #ea580c14}.chat-new-user-offer__icon{color:#ea580c;background:#ffedd5;border-radius:10px;justify-content:center;align-items:center;width:34px;height:34px;display:flex}.chat-new-user-offer__text{color:#9a3412;min-width:0;font-size:.78rem;line-height:1.35}.chat-new-user-offer__text strong{color:#7c2d12;margin-bottom:2px;font-size:.88rem;display:block}.chat-new-user-offer__action{color:#c2410c;white-space:nowrap;font-size:.78rem;font-weight:800}.chat-new-user-offer:hover{background:#ffedd5;border-color:#fb923c}.chat-messages{scroll-behavior:smooth;flex-direction:column;flex:1;gap:20px;padding:20px;display:flex;overflow-y:auto}.message-wrapper{gap:12px;max-width:100%;animation:.3s ease-out fadeIn;display:flex}.message-wrapper.user{flex-direction:row-reverse}.avatar{width:32px;height:32px;box-shadow:var(--shadow-sm);border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.assistant .avatar{color:#fff;background:linear-gradient(135deg,#4f46e5,#8b5cf6)}.user .avatar{color:#64748b;background:#f1f5f9;border:1px solid #e2e8f0}.message-content{flex-direction:column;gap:8px;max-width:calc(100% - 44px);display:flex}.bubble{box-shadow:var(--shadow-sm);word-wrap:break-word;border-radius:16px;padding:12px 16px;font-size:.9rem;line-height:1.5}.user .bubble{background:var(--user-bubble);color:#fff;border-top-right-radius:4px}.assistant .bubble{background:var(--ai-bubble);color:var(--text-main);border:1px solid var(--border-light);border-top-left-radius:4px}.file-bubble{align-items:center;gap:10px;font-weight:500;display:flex;color:var(--text-main)!important;border:1px solid var(--border)!important;background:#f8fafc!important;border-radius:12px!important}.spin-icon{animation:1s linear infinite spin}.chat-input-area{padding:12px 20px calc(20px + env(safe-area-inset-bottom)) 20px;z-index:10;background:linear-gradient(#f8fafc00,#f8fafc 15%);flex-direction:column;gap:8px;display:flex}.app-dock{gap:12px;margin-bottom:4px;display:flex}.dock-btn{border:1px solid var(--border);color:var(--text-main);cursor:pointer;background:#fff;border-radius:20px;align-items:center;gap:6px;padding:6px 14px;font-size:.8rem;font-weight:600;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex;box-shadow:0 2px 8px #0000000a}.dock-btn.disabled{opacity:.6;cursor:not-allowed;color:var(--text-muted);box-shadow:none;background:#f8fafc}.dock-btn.active-dock{background:var(--primary);color:#fff;border-color:var(--primary)}.dock-btn:not(.disabled):hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000014}.dock-btn:not(.disabled):active{transform:translateY(0)scale(.96)}.input-container{border:1px solid var(--border-light);background:#fff;border-radius:24px;align-items:flex-end;gap:10px;padding:8px;transition:box-shadow .3s;display:flex;box-shadow:0 8px 32px #0000000f}.input-container:focus-within{box-shadow:var(--shadow-md);border-color:#c7d2fe}.upload-btn{width:36px;height:36px;color:var(--text-muted);cursor:pointer;background:#f1f5f9;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:all .2s;display:flex}.upload-btn:hover{color:var(--primary);background:#e2e8f0}.input-wrapper{flex:1;align-items:center;display:flex}.input-wrapper input{width:100%;color:var(--text-main);background:0 0;border:none;outline:none;padding:8px 4px;font-size:.95rem}.input-wrapper input::placeholder{color:#94a3b8}.send-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#4f46e5,#6366f1);border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;transition:all .2s;display:flex;box-shadow:0 4px 12px #4f46e54d}.send-btn:disabled{cursor:not-allowed;box-shadow:none;background:#cbd5e1}.send-btn:not(:disabled):hover{transform:scale(1.05)}.send-btn:not(:disabled):active{transform:scale(.95)}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;background:#0f172a66;flex-direction:column;justify-content:flex-end;animation:.2s ease-out fadeIn;display:flex;position:absolute;inset:0}.modal-content{background:#fff;border-top-left-radius:24px;border-top-right-radius:24px;flex-direction:column;height:85%;animation:.3s cubic-bezier(.16,1,.3,1) slideUp;display:flex;box-shadow:0 -10px 40px #0000001a}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.modal-header{border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.modal-header h2{align-items:center;gap:8px;font-size:1.1rem;font-weight:700;display:flex}.close-btn{cursor:pointer;width:32px;height:32px;color:var(--text-muted);background:#f1f5f9;border:none;border-radius:50%;justify-content:center;align-items:center;transition:all .2s;display:flex}.close-btn:hover{color:var(--text-main);background:#e2e8f0}.modal-body{flex:1;padding:20px;overflow-y:auto}.tour-layer{z-index:1400;pointer-events:auto;position:fixed;inset:0}.tour-dim{background:0 0;position:absolute;inset:0}.tour-highlight{pointer-events:none;background:0 0;border:2px solid #fff;border-radius:14px;transition:top .2s,left .2s,width .2s,height .2s;animation:1.6s ease-in-out infinite tourPulse;position:fixed;box-shadow:0 0 0 9999px #0f172aad,0 0 0 4px #4f46e5eb,0 16px 36px #0f172a47}@keyframes tourPulse{0%,to{box-shadow:0 0 0 9999px #0f172aad,0 0 0 4px #4f46e5db,0 16px 36px #0f172a47}50%{box-shadow:0 0 0 9999px #0f172aad,0 0 0 6px #4f46e5,0 18px 44px #4f46e55c}}.tour-popover{pointer-events:auto;background:#fff;border:1px solid #e2e8f0;border-radius:14px;width:min(316px,100vw - 32px);padding:18px;position:fixed;box-shadow:0 24px 70px #0f172a57}.tour-close{color:#64748b;cursor:pointer;background:#f1f5f9;border:none;border-radius:8px;justify-content:center;align-items:center;width:30px;height:30px;display:flex;position:absolute;top:10px;right:10px}.tour-count{color:#4f46e5;background:#e0e7ff;border-radius:999px;align-items:center;height:24px;margin-bottom:10px;padding:0 9px;font-size:.76rem;font-weight:700;display:inline-flex}.tour-popover h3{color:#0f172a;margin:0 28px 8px 0;font-size:1rem;line-height:1.35}.tour-popover p{color:#64748b;margin:0 0 16px;font-size:.86rem;line-height:1.55}.tour-actions{justify-content:space-between;align-items:center;gap:10px;display:flex}.tour-step-actions{align-items:center;gap:8px;display:flex}.tour-secondary,.tour-icon-button,.tour-primary{cursor:pointer;border:none;font-weight:700}.tour-secondary{color:#64748b;background:0 0;padding:8px 4px}.tour-icon-button{color:#334155;background:#f1f5f9;border-radius:8px;justify-content:center;align-items:center;width:34px;height:34px;display:flex}.tour-icon-button:disabled{opacity:.42;cursor:default}.tour-primary{color:#fff;background:#4f46e5;border-radius:8px;justify-content:center;align-items:center;gap:4px;min-width:88px;height:36px;padding:0 12px;display:inline-flex}.empty-state{height:100%;color:var(--text-muted);text-align:center;flex-direction:column;justify-content:center;align-items:center;font-size:.9rem;display:flex}.file-list{flex-direction:column;gap:12px;display:flex}.file-item{border:1px solid var(--border);background:#f8fafc;border-radius:12px;align-items:center;gap:12px;padding:12px 16px;display:flex}.file-info{flex-direction:column;gap:4px;display:flex}.f-name{color:var(--text-main);font-size:.9rem;font-weight:600}.f-status{color:#10b981;font-size:.75rem}.paper-modal-content{background:#f8fafc;height:92%}.export-btn-sm{border:1px solid var(--primary);color:var(--primary);cursor:pointer;background:#fff;border-radius:16px;align-items:center;gap:4px;padding:6px 12px;font-size:.8rem;font-weight:600;transition:all .2s;display:flex}.export-btn-sm:hover{background:var(--primary);color:#fff}.markdown-preview{color:#334155;overflow-wrap:break-word;background:#fff;border-radius:16px;padding:24px;font-size:.95rem;line-height:1.8;overflow-x:auto;box-shadow:0 4px 20px #0000000a}.markdown-preview h3{text-align:center;color:#0f172a;margin-bottom:20px;font-size:1.25rem}.markdown-preview h4{color:#1e293b;border-left:4px solid var(--primary);margin:24px 0 12px;padding-left:8px;font-size:1rem}.markdown-preview p{margin-bottom:12px}.paper-renderer-container{color:#1e293b;background:#fff;padding:0 16px}.paper-title-block{text-align:center;margin-bottom:30px}.paper-title{margin:0 0 8px;font-size:22px;font-weight:700;line-height:1.35}.paper-subtitle{color:#64748b;font-size:14px;font-weight:700;line-height:1.6}.paper-section{margin-bottom:30px}.paper-section-title{color:#1e293b;margin:0 0 16px;font-size:16px;font-weight:700;line-height:1.6}.question-item{border-bottom:1px dashed #e2e8f0;margin-bottom:24px;padding-bottom:16px}.question-content{grid-template-columns:max-content minmax(0,1fr);align-items:start;column-gap:6px;margin-bottom:12px;font-size:15px;line-height:1.6;display:grid}.question-number{font-weight:700;line-height:1.6}.question-text{min-width:0}.question-content p{margin:0 0 8px}.sub-questions{margin:16px 0 0 24px}.question-media{text-align:center;margin:12px 0}.question-media__svg,.question-media__svg-inline svg{max-width:100%;height:auto;margin:0 auto;display:block}.question-media__svg{object-fit:contain}.question-media__error{color:#999;margin:12px 0;font-size:14px}.question-options{gap:10px 18px;margin-top:12px;display:grid}.question-options--two-column{grid-template-columns:repeat(2,minmax(0,1fr))}.question-options--stacked{grid-template-columns:1fr}.option-item{grid-template-columns:max-content minmax(0,auto);align-items:start;column-gap:8px;width:fit-content;min-width:0;max-width:100%;line-height:1.6;display:grid}.option-label{font-weight:700;line-height:1.6}.option-item p,.option-item .katex-display{margin:0}@media (width<=420px){.question-options--two-column{grid-template-columns:1fr}}.typing-bubble{align-items:center;gap:4px;display:flex;padding:16px 20px!important}.dot{background:var(--text-muted);border-radius:50%;width:6px;height:6px;animation:1.4s ease-in-out infinite both bounce}.dot:first-child{animation-delay:-.32s}.dot:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes progressAnim{0%{width:0%}to{width:95%}}.agent-thinking{border:1px solid var(--border);background:#f8fafc;border-left:3px solid #8b5cf6;border-radius:8px;padding:12px 16px;font-size:.85rem;box-shadow:0 2px 8px #00000005}.thinking-header{align-items:center;gap:8px;margin-bottom:10px;display:flex}.thinking-steps{flex-direction:column;gap:8px;list-style:none;display:flex}.thinking-step{color:#475569;align-items:flex-start;gap:8px;display:flex}.fade-in-up{animation:.3s ease-out forwards fadeInUp}@keyframes fadeInUp{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.blink{color:#94a3b8;padding-left:20px;animation:1.4s infinite blink}@keyframes blink{0%,to{opacity:.4}50%{opacity:1}}.auth-page{background:#fff;flex-direction:column;width:100%;max-width:480px;height:100dvh;margin:0 auto;display:flex;overflow-y:auto;box-shadow:0 0 40px #0000001a}.auth-container{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:40px;display:flex}.logo-box{background:linear-gradient(135deg,#4f46e5,#8b5cf6);border-radius:20px;justify-content:center;align-items:center;width:72px;height:72px;margin:0 auto 24px;display:flex;box-shadow:0 12px 24px #4f46e540}.auth-title{color:#0f172a;margin-bottom:8px;font-size:1.5rem;font-weight:700}.auth-subtitle{color:#64748b;margin-bottom:40px;font-size:.9rem}.auth-form{flex-direction:column;gap:16px;width:100%;display:flex}.input-group{box-sizing:border-box;background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;align-items:center;width:100%;height:54px;padding:0 16px;transition:all .2s;display:flex}.input-group:focus-within{background:#fff;border-color:#4f46e5;box-shadow:0 0 0 3px #4f46e51a}.input-group input{color:#1e293b;background:0 0;border:none;outline:none;flex:1;height:100%;font-size:1rem}.code-group{padding-right:6px}.get-code-btn{color:#4f46e5;cursor:pointer;background:0 0;border:none;height:100%;padding:8px;font-size:.9rem;font-weight:600}.submit-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#4f46e5,#8b5cf6);border:none;border-radius:12px;width:100%;margin-top:8px;padding:16px;font-size:1.05rem;font-weight:600;transition:all .2s;box-shadow:0 8px 20px #4f46e540}.submit-btn:active{transform:scale(.98)}.auth-footer{color:#94a3b8;justify-content:center;margin-top:32px;font-size:.75rem;display:flex}.auth-footer label{cursor:pointer;align-items:center;gap:6px;display:flex}.auth-link{color:#4f46e5;text-decoration:none}.auth-link:hover{text-decoration:underline}.pay-page{background:#f6f8fb}.pay-header{z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff0;border-bottom:1px solid #e8eef6;justify-content:space-between;align-items:center;padding:14px 18px;display:flex;position:sticky;top:0}.pay-header h2{color:#111827;font-size:1.05rem;font-weight:700}.pay-header-spacer{width:34px;height:34px}.back-btn{cursor:pointer;color:#111827;background:0 0;border:none;border-radius:10px;justify-content:center;align-items:center;width:34px;height:34px;display:flex}.back-btn:hover{background:#eef2f7}.pay-content{flex-direction:column;flex:1;gap:16px;padding:18px;display:flex}.pay-hero{color:#fff;background:linear-gradient(135deg,#12315f,#1f6f78);border-radius:14px;align-items:center;gap:14px;padding:18px;display:flex;box-shadow:0 14px 34px #12315f33}.pay-hero-icon{color:#f8d66d;background:#ffffff29;border-radius:14px;flex:none;justify-content:center;align-items:center;width:52px;height:52px;display:flex}.pay-hero h3{margin-bottom:6px;font-size:1.15rem;font-weight:800}.pay-hero p{color:#ffffffc7;font-size:.84rem;line-height:1.55}.pay-new-user-banner{color:#9a3412;cursor:pointer;text-align:left;background:#fff7ed;border:1px solid #fed7aa;border-radius:14px;align-items:center;gap:12px;width:100%;padding:13px 14px;display:flex;box-shadow:0 8px 22px #ea580c14}.pay-new-user-banner strong{color:#7c2d12;margin-bottom:2px;font-size:.92rem;display:block}.pay-new-user-banner span{font-size:.82rem;line-height:1.45}.pay-section{flex-direction:column;gap:12px;display:flex}.pay-section-title{justify-content:space-between;align-items:center;padding:0 2px;display:flex}.pay-section-title h4{color:#111827;font-size:.98rem;font-weight:800}.pay-section-title span{color:#64748b;font-size:.78rem}.pay-loading,.pay-empty{color:#64748b;background:#fff;border:1px solid #e8eef6;border-radius:14px;justify-content:center;align-items:center;gap:10px;min-height:120px;display:flex}.pkg-list{flex-direction:column;gap:12px;display:flex}.pkg-card{cursor:pointer;text-align:left;background:#fff;border:1.5px solid #e2e8f0;border-radius:14px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px;width:100%;padding:15px;transition:border-color .18s,box-shadow .18s,background .18s,transform .18s;display:grid;position:relative}.pkg-card:hover{border-color:#9fb3ca;transform:translateY(-1px)}.pkg-card.selected{background:#f8fbff;border-color:#2563eb;box-shadow:0 10px 28px #2563eb1f}.pkg-card.new-user{border-color:#fdba74}.pkg-card.new-user.selected{background:#fff7ed;border-color:#ea580c;box-shadow:0 10px 28px #ea580c21}.pkg-main{min-width:0}.pkg-title-row{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px;display:flex}.pkg-title-row strong{color:#111827;font-size:.95rem}.pkg-badge{color:#c2410c;background:#ffedd5;border-radius:999px;align-items:center;height:20px;padding:0 7px;font-size:.7rem;font-weight:800;display:inline-flex}.pkg-points{color:#0f172a;align-items:baseline;gap:4px;font-size:1.45rem;font-weight:900;line-height:1.1;display:flex}.pkg-points span{color:#64748b;font-size:.78rem;font-weight:700}.pkg-main p{color:#64748b;margin-top:7px;font-size:.78rem;line-height:1.45}.pkg-side{white-space:nowrap;flex-direction:column;align-items:flex-end;gap:4px;display:flex}.pkg-price{color:#0f766e;font-size:1.18rem;font-weight:900}.pkg-unit{color:#94a3b8;font-size:.72rem}.pkg-check{color:#fff;background:#2563eb;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;display:flex;position:absolute;top:-7px;right:-7px;box-shadow:0 6px 16px #2563eb47}.pkg-card.new-user.selected .pkg-check{background:#ea580c}.pay-method-section{padding-bottom:94px}.pay-type-selector{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.pay-type-option{color:#475569;cursor:pointer;background:#fff;border:1.5px solid #e2e8f0;border-radius:12px;justify-content:center;align-items:center;gap:8px;min-height:48px;font-weight:800;display:flex}.pay-type-option.wechat.selected{color:#15803d;background:#f0fdf4;border-color:#16a34a}.pay-type-option.alipay.selected{color:#1d4ed8;background:#eff6ff;border-color:#2563eb}.pay-bottom{padding:12px 18px calc(16px + env(safe-area-inset-bottom));-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#fffffff5;border-top:1px solid #e8eef6;margin:auto -18px -18px;position:sticky;bottom:0}.pay-safe-tip{color:#64748b;justify-content:center;align-items:center;gap:6px;margin-bottom:10px;font-size:.76rem;display:flex}.pay-submit{color:#fff;background:#111827;justify-content:center;align-items:center;gap:8px;margin-top:0;display:flex;box-shadow:0 10px 24px #11182733}.pay-submit:disabled{cursor:not-allowed;opacity:.62;transform:none}.pay-qr-content{justify-content:center}.pay-qr-card{text-align:center;background:#fff;border:1px solid #e8eef6;border-radius:18px;padding:28px 20px;box-shadow:0 16px 36px #0f172a14}.pay-qr-icon{color:#2563eb;background:#eff6ff;border-radius:16px;justify-content:center;align-items:center;width:52px;height:52px;margin:0 auto 14px;display:flex}.pay-qr-card h3{color:#111827;margin-bottom:6px;font-size:1.1rem;font-weight:800}.pay-qr-card p{color:#64748b;font-size:.84rem}.pay-qr-box{background:#fff;border:1px solid #edf2f7;border-radius:16px;width:fit-content;margin:22px auto 0;padding:14px;box-shadow:0 8px 22px #0f172a14}.pay-qr-note{color:#64748b;justify-content:center;align-items:center;gap:8px;margin-top:18px;font-size:.84rem;display:flex}@media (width<=420px){.pkg-card{grid-template-columns:1fr}.pkg-side{align-items:flex-start}}.new-chat-btn{color:#64748b;cursor:pointer;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;padding:6px;transition:all .2s;display:flex}.new-chat-btn:hover{color:#4f46e5;background:#f1f5f9}.new-chat-btn:active{transform:scale(.95)}.header-avatar-btn{color:#4f46e5;cursor:pointer;background:#e0e7ff;border:2px solid #fff;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;transition:transform .2s;display:flex;box-shadow:0 2px 8px #00000014}.header-avatar-btn:active{transform:scale(.95)}.header-login-btn{cursor:pointer;color:#fff;background:linear-gradient(135deg,#4f46e5,#6366f1);border:none;border-radius:20px;align-items:center;gap:6px;padding:6px 14px;font-size:.85rem;font-weight:600;transition:all .2s;display:flex;box-shadow:0 4px 12px #4f46e533}.header-login-btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px #4f46e54d}.header-login-btn:active{transform:scale(.95)}.profile-content{flex-direction:column;gap:16px;padding:20px;display:flex}.profile-card{background:#fff;border-radius:16px;padding:20px;box-shadow:0 4px 12px #00000005}.user-info-card{align-items:center;gap:16px;display:flex}.user-avatar-large{color:#4f46e5;background:#e0e7ff;border-radius:50%;justify-content:center;align-items:center;width:64px;height:64px;display:flex}.user-details h3{color:#0f172a;margin-bottom:4px;font-size:1.2rem;font-weight:700}.user-details p{color:#94a3b8;font-size:.8rem}.points-card{background:linear-gradient(135deg,#fffbeb,#fef3c7);border:1px solid #fde68a;justify-content:space-between;align-items:center;display:flex}.points-label{color:#b45309;font-size:.8rem;font-weight:600}.points-value{color:#d97706;align-items:baseline;gap:4px;margin-top:8px;display:flex}.points-value strong{font-size:2rem;font-weight:800;line-height:1}.points-value .unit{font-size:.9rem;font-weight:600}.recharge-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#f59e0b,#fbbf24);border:none;border-radius:20px;padding:10px 20px;font-weight:600;transition:all .2s;box-shadow:0 4px 12px #f59e0b4d}.recharge-btn:active{transform:scale(.96)}.menu-list{background:#fff;border-radius:16px;padding:8px 0;box-shadow:0 4px 12px #00000005}.menu-item{color:#1e293b;cursor:pointer;border-bottom:1px solid #f1f5f9;align-items:center;gap:12px;padding:16px 20px;font-size:.95rem;font-weight:500;transition:background .2s;display:flex}.menu-item:last-child{border-bottom:none}.menu-item:hover{background:#f8fafc}.logout-btn{color:#ef4444;cursor:pointer;background:#fff;border:none;border-radius:16px;justify-content:center;align-items:center;gap:8px;margin-top:24px;padding:16px;font-size:1rem;font-weight:600;transition:all .2s;display:flex;box-shadow:0 4px 12px #00000005}.logout-btn:active{background:#fff5f5;transform:scale(.98)}.sidebar-overlay{z-index:1000;contain:layout paint;background:#0006;justify-content:flex-start;width:100%;height:100dvh;display:flex;position:fixed;top:0;left:0}.sidebar-content{will-change:transform;backface-visibility:hidden;background:#fff;flex-direction:column;width:80%;max-width:320px;height:100%;animation:.24s cubic-bezier(.16,1,.3,1) forwards slideInLeft;display:flex;transform:translate(-100%)}@keyframes slideInLeft{0%{transform:translate(-100%)}to{transform:translate(0,0)}}.sidebar-header{border-bottom:1px solid #f1f5f9;align-items:center;gap:12px;padding:16px;display:flex}.new-chat-btn-large{color:#0f172a;cursor:pointer;background:#f1f5f9;border:none;border-radius:12px;flex:1;justify-content:center;align-items:center;gap:8px;padding:12px;font-size:.95rem;font-weight:600;transition:background .2s;display:flex}.new-chat-btn-large:hover{background:#e2e8f0}.new-chat-btn-large:active{transform:scale(.98)}.sidebar-history-list{contain:content;flex-direction:column;flex:1;gap:4px;padding:16px;display:flex;overflow-y:auto}.history-group-title{color:#94a3b8;margin:12px 0 8px 4px;font-size:.75rem;font-weight:600}.history-item{cursor:pointer;color:#334155;border-radius:10px;align-items:center;gap:12px;padding:12px;font-size:.9rem;transition:background .2s;display:flex}.history-item:hover{background:#f8fafc}.history-item.active{color:#4f46e5;background:#e0e7ff;font-weight:500}.history-item span{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.sidebar-footer{border-top:1px solid #f1f5f9;padding:16px}.sidebar-user{cursor:pointer;border-radius:12px;align-items:center;gap:12px;padding:8px;transition:background .2s;display:flex}.sidebar-user:hover{background:#f8fafc}.sidebar-avatar{background:#e0e7ff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.sidebar-user-info h4{color:#0f172a;margin-bottom:2px;font-size:.95rem;font-weight:600}.sidebar-user-info p{color:#64748b;font-size:.8rem}@media (prefers-reduced-motion:reduce){.sidebar-content{animation:none;transform:translate(0,0)}}@page{size:A4;margin:0}@media print{html,body,#root{background:#fff!important;width:auto!important;height:auto!important;min-height:0!important;overflow:visible!important}body{color:#000;-webkit-print-color-adjust:exact;print-color-adjust:exact;font-family:SimSun,Songti SC,Noto Serif CJK SC,serif;margin:0!important}body:after{content:"本试卷由 AI 辅助生成，仅供参考";color:#666;text-align:left;background:#fff;border-top:1px solid #d0d0d0;padding-top:2mm;font-size:8.5pt;line-height:1.45;position:fixed;bottom:8mm;left:13mm;right:13mm}.chat-app{width:auto!important;max-width:none!important;height:auto!important;min-height:0!important;box-shadow:none!important;background:#fff!important;margin:0!important;display:block!important;overflow:visible!important}.main-content,.paper-pane,.paper-body{background:#fff!important;border:0!important;height:auto!important;min-height:0!important;padding:0!important;display:block!important;overflow:visible!important}.chat-header,.chat-pane,.app-dock,.paper-pane>.paper-header,.export-btn,.export-btn-sm,.modal-header,.close-btn{display:none!important}.markdown-preview{color:#000;box-shadow:none;border-radius:0;font-size:10.5pt;line-height:1.72;padding:0!important;overflow:visible!important}.paper-renderer-container{color:#000;-webkit-box-decoration-break:clone;box-decoration-break:clone;background:#fff;width:100%;padding:14mm 13mm 24mm!important}.paper-title-block{border-bottom:1px solid #000;margin:0 0 9mm;padding-bottom:4mm}.paper-title{color:#000;margin:0 0 3mm;font-size:17pt;font-weight:700;line-height:1.35}.paper-subtitle{color:#000;font-size:10pt;font-weight:400;line-height:1.6}.paper-section{break-inside:auto;page-break-inside:auto;margin-bottom:8mm}.paper-section-title{color:#000;break-after:avoid;page-break-after:avoid;border-top:1px solid #000;border-bottom:1px solid #000;margin:0 0 4mm;padding:1.5mm 0;font-size:12pt;font-weight:700;line-height:1.6}.question-item{break-inside:avoid;page-break-inside:avoid;border-bottom:0;margin:0 0 5mm;padding:0}.question-content{color:#000;grid-template-columns:max-content minmax(0,1fr);column-gap:1.5mm;margin-bottom:2.5mm;font-size:10.5pt;line-height:1.72}.question-number{color:#000;font-weight:700;line-height:1.72}.question-content p,.option-item p{margin:0}.question-media{break-inside:avoid;page-break-inside:avoid;margin:3mm 0 4mm}.question-media__svg,.question-media__svg-inline svg{max-width:92%;max-height:78mm}.question-options{break-inside:avoid;page-break-inside:avoid;gap:2.2mm 10mm;margin-top:2mm}.question-options--two-column{grid-template-columns:repeat(2,minmax(0,1fr))}.question-options--stacked{grid-template-columns:1fr}.option-item{color:#000;width:auto;max-width:100%;font-size:10.5pt;line-height:1.65}.option-label{font-weight:700}.sub-questions{margin:3mm 0 0 7mm}.katex{color:#000}}.sub-page{flex-direction:column;gap:16px;padding:16px;display:flex}.history-card{background:#fff;border:1px solid #f1f5f9;border-radius:12px;padding:16px;box-shadow:0 2px 10px #00000008}.history-card-header{align-items:center;gap:8px;margin-bottom:8px;display:flex}.history-date{color:#94a3b8;font-size:.8rem}.history-title{color:#1e293b;margin:0 0 12px;font-size:1rem;font-weight:600}.history-card-footer{border-top:1px dashed #e2e8f0;justify-content:space-between;align-items:center;padding-top:12px;display:flex}.history-tokens{color:#64748b;align-items:center;gap:4px;font-size:.8rem;display:flex}.history-action-btn{color:#3b82f6;cursor:pointer;background:#eff6ff;border:none;border-radius:6px;padding:6px 12px;font-size:.85rem;font-weight:500}.billing-summary{color:#fff;background:linear-gradient(135deg,#4f46e5 0%,#3b82f6 100%);border-radius:12px;justify-content:space-between;align-items:center;padding:20px;display:flex}.billing-summary p{opacity:.9;flex-direction:column;gap:4px;margin:0;font-size:.9rem;display:flex}.billing-summary span{opacity:1;font-size:1.2rem;font-weight:700}.billing-list{background:#fff;border-radius:12px;padding:0 16px}.billing-item{border-bottom:1px solid #f1f5f9;justify-content:space-between;align-items:center;padding:16px 0;display:flex}.billing-item:last-child{border-bottom:none}.billing-item-left h4{color:#1e293b;margin:0 0 4px;font-size:.95rem;font-weight:500}.billing-item-left p{color:#94a3b8;margin:0;font-size:.8rem}.billing-item-right{text-align:right;flex-direction:column;gap:2px;display:flex}.billing-item-right.recharge .amount{color:#10b981;font-weight:600}.billing-item-right.consume .amount{color:#1e293b;font-weight:600}.billing-item-right .price{color:#94a3b8;font-size:.8rem}.settings-group{background:#fff;border-radius:12px;margin-bottom:16px;padding:0 16px}.settings-item{color:#1e293b;cursor:pointer;border-bottom:1px solid #f1f5f9;justify-content:space-between;align-items:center;padding:16px 0;font-size:.95rem;display:flex}.settings-item:last-child{border-bottom:none}.settings-value{color:#94a3b8;align-items:center;font-size:.9rem;display:flex}.toggle-switch{background:#cbd5e1;border-radius:11px;width:40px;height:22px;position:relative}.toggle-switch:after{content:"";background:#fff;border-radius:50%;width:18px;height:18px;position:absolute;top:2px;left:2px}.toggle-switch.disabled{opacity:.5}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.17.0"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.newline{display:block}.katex .base{white-space:nowrap;width:min-content;position:relative}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{flex-direction:row;display:inline-flex}.katex .thinbox{width:0;max-width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}