:root{--bg: #ffffff;--surface: #ffffff;--surface-muted: #f7f7f8;--surface-raised: #ffffff;--border: #e5e5e5;--border-strong: #d0d0d3;--text: #1a1a1e;--text-secondary: #52525b;--text-dim: #8b8b93;--primary: #14b8a6;--primary-hover: #0d9488;--primary-contrast: #ffffff;--danger: #dc2626;--danger-bg: #fef2f2;--danger-border: #fecaca;--focus-ring: rgb(20 184 166 / .35);--radius: 12px;--radius-sm: 8px;--shadow-sm: 0 1px 2px rgb(0 0 0 / .04);--shadow-md: 0 1px 3px rgb(0 0 0 / .05), 0 4px 16px rgb(0 0 0 / .05);--header-bg: rgb(255 255 255 / .82);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}:root[data-theme=dark]{--bg: #0e0f11;--surface: #16181b;--surface-muted: #1d2023;--surface-raised: #1a1d20;--border: #26292e;--border-strong: #33373d;--text: #ececee;--text-secondary: #a8abb1;--text-dim: #71757c;--primary: #2dd4bf;--primary-hover: #5eead4;--primary-contrast: #042f2a;--danger: #f87171;--danger-bg: rgb(248 113 113 / .08);--danger-border: rgb(248 113 113 / .25);--focus-ring: rgb(45 212 191 / .4);--shadow-sm: 0 1px 2px rgb(0 0 0 / .3);--shadow-md: 0 1px 3px rgb(0 0 0 / .3), 0 4px 16px rgb(0 0 0 / .25);--header-bg: rgb(14 15 17 / .82)}*{box-sizing:border-box}html{color-scheme:light dark}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased;transition:background-color .2s ease,color .2s ease}#root{min-height:100dvh}::selection{background:#14b8a633}:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px;border-radius:4px}.app{display:flex;flex-direction:column;min-height:100dvh;max-width:1280px;margin:0 auto;padding:0 24px}.header{position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:16px;height:60px;margin:0 -24px;padding:0 24px;background:var(--header-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:10px}.brand-mark{width:30px;height:30px;display:grid;place-items:center;border-radius:8px;background:var(--primary);color:var(--primary-contrast);font-family:Georgia,Times New Roman,serif;font-size:19px;font-style:italic;font-weight:600;line-height:1}.brand-name{font-size:16px;font-weight:650;letter-spacing:-.01em}.header-right{display:flex;align-items:center;gap:8px}.badges{display:flex;align-items:center;gap:12px;margin-right:8px}.badge{font-size:12.5px;color:var(--text-secondary)}.badge+.badge:before{content:"·";margin-right:12px;color:var(--text-dim)}.icon-btn{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text-secondary);cursor:pointer;transition:all .15s ease}.icon-btn:hover{color:var(--text);border-color:var(--border-strong);background:var(--surface-muted)}.main{display:grid;grid-template-columns:minmax(320px,42%) 1fr;gap:16px;align-items:stretch;padding:20px 0 4px}.pane{display:flex;flex-direction:column;gap:12px;min-width:0}.dropzone{position:relative;display:grid;place-items:center;flex:1;min-height:clamp(240px,44vh,430px);border:1.5px dashed var(--border-strong);border-radius:var(--radius);background:var(--surface);cursor:pointer;overflow:hidden;transition:border-color .15s ease,background-color .15s ease}.dropzone:hover{border-color:var(--primary)}.dropzone.dragging{border-color:var(--primary);background:var(--surface-muted)}.dropzone.has-image{border-style:solid}.dropzone-empty{text-align:center;padding:32px 24px;color:var(--text-dim)}.dropzone-icon{font-size:40px;color:var(--border-strong);font-family:Georgia,serif;line-height:1;margin-bottom:14px}.dropzone-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:6px}.dropzone-sub{font-size:13px}.dropzone-formats{font-size:12px;margin-top:12px;opacity:.75}kbd{padding:1px 5px;border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;background:var(--surface-muted);font-size:11px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--text-secondary)}.dropzone-preview{display:flex;flex-direction:column;align-items:center;gap:8px;padding:16px;width:100%;min-height:0}.dropzone-preview img{max-width:100%;max-height:calc(100% - 44px);object-fit:contain;border-radius:6px}.dropzone-meta{font-size:12px;color:var(--text-dim)}.dropzone-hint{font-size:12px;color:var(--text-dim);opacity:.8}.dropzone-busy{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background:color-mix(in srgb,var(--bg) 82%,transparent);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);font-size:13.5px;color:var(--text)}.spinner{width:24px;height:24px;border:2.5px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:8px 10px;box-shadow:var(--shadow-sm)}.toolbar-actions{display:flex;gap:6px;flex-wrap:wrap}.toolbar-status{font-size:12px;color:var(--text-dim);white-space:nowrap;font-variant-numeric:tabular-nums}.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:var(--radius-sm);padding:7px 13px;font-size:13px;font-weight:500;font-family:inherit;cursor:pointer;transition:all .13s ease}.btn:hover:not(:disabled){background:var(--surface-muted);border-color:var(--border-strong)}.btn:active:not(:disabled){transform:scale(.98)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--primary);border-color:var(--primary);color:var(--primary-contrast);font-weight:600}.btn-primary:hover:not(:disabled){background:var(--primary-hover);border-color:var(--primary-hover)}.btn-icon{padding:7px 10px}.btn-ghost{border:none;background:none;color:var(--text-dim);font-size:12px;padding:4px 8px}.btn-ghost:hover:not(:disabled){color:var(--danger);background:none}.settings-panel{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:8px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px}.field{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-secondary)}.field>span:first-child{min-width:3.5em}.field-value{font-variant-numeric:tabular-nums;color:var(--text);min-width:4em}.field input[type=range]{flex:1;accent-color:var(--primary)}.field input[type=color]{width:30px;height:24px;padding:0;border:1px solid var(--border);border-radius:6px;cursor:pointer;background:none}.field select,.admin-toolbar select,.admin-toolbar input{border:1px solid var(--border-strong);border-radius:6px;padding:4px 6px;font-size:13px;background:var(--surface);color:var(--text)}.error-banner{background:var(--danger-bg);border:1px solid var(--danger-border);color:var(--danger);border-radius:var(--radius);padding:10px 14px;font-size:13px}.preview{height:clamp(200px,34vh,340px);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:auto;display:flex;scrollbar-gutter:stable;scrollbar-width:thin}.preview-canvas{position:relative;flex:1;color:var(--text);padding:20px;display:grid;place-items:center}.preview-canvas mjx-container{max-width:100%;overflow-x:auto;overflow-y:hidden}.preview-placeholder{color:var(--text-dim);font-size:13px;text-align:center}.preview-error{position:absolute;inset:auto 12px 12px 12px;background:var(--danger-bg);border:1px solid var(--danger-border);border-radius:var(--radius-sm);padding:8px 12px}.preview-error-title{color:var(--danger);font-weight:600;font-size:13px}.preview-error-msg{color:var(--danger);font-size:12px;margin-top:2px;word-break:break-all;opacity:.85}.editor{height:clamp(200px,34vh,340px);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column}.editor-head{display:flex;justify-content:space-between;align-items:center;padding:7px 12px;border-bottom:1px solid var(--border);background:var(--surface-muted)}.editor-label{font-size:12px;font-weight:600;color:var(--text-secondary)}.editor-hint{font-size:11px;color:var(--text-dim)}.editor-area{display:block;flex:1;width:100%;min-height:0;resize:none;border:none;outline:none;padding:12px 14px;font:13px/1.65 ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace;color:var(--text);background:transparent}.history{margin-top:20px;border-top:1px solid var(--border);padding:12px 0 28px}.history-head{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-dim);margin-bottom:8px}.history-list{display:flex;gap:10px;overflow-x:auto;padding-bottom:4px}.history-item{position:relative;flex:0 0 auto}.history-thumb{width:96px;height:56px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-muted);overflow:hidden;cursor:pointer;padding:0;display:block}.history-thumb img{width:100%;height:100%;object-fit:cover}.history-thumb:hover{border-color:var(--primary)}.history-remove{position:absolute;top:-6px;right:-6px;width:18px;height:18px;border-radius:50%;border:none;background:var(--text);color:var(--bg);font-size:12px;line-height:1;cursor:pointer;display:grid;place-items:center;opacity:0;transition:opacity .12s}.history-item:hover .history-remove{opacity:.85}.toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%);background:var(--text);color:var(--bg);font-size:13px;padding:9px 18px;border-radius:999px;box-shadow:var(--shadow-md);animation:toast-in .18s ease-out;z-index:50}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,6px)}to{opacity:1;transform:translate(-50%)}}.privacy-link{font-size:12.5px;color:var(--text-dim);text-decoration:none;padding:3px 6px}.privacy-link:hover{color:var(--text)}.privacy{max-width:720px;margin:0 auto;padding:28px 20px 60px}.privacy-head h1{font-size:22px;margin:12px 0 4px;letter-spacing:-.02em}.privacy-updated{font-size:12px;color:var(--text-dim);margin:0 0 8px}.privacy-back{font-size:13px;color:var(--primary);text-decoration:none}.privacy section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;margin-top:14px}.privacy h2{font-size:15px;margin:0 0 10px}.privacy ul{margin:0;padding-left:20px}.privacy li{font-size:14px;line-height:1.8}.privacy p{font-size:14px;line-height:1.7;margin:6px 0 0}.admin{max-width:1080px;margin:0 auto;padding:20px 16px 60px}.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.admin-title{font-size:17px;font-weight:700;letter-spacing:-.01em}.admin-nav{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:18px}.admin-tab{border:none;background:none;padding:9px 16px;font-size:14px;font-family:inherit;color:var(--text-dim);cursor:pointer;border-bottom:2px solid transparent;transition:color .13s}.admin-tab:hover{color:var(--text)}.admin-tab.active{color:var(--text);border-bottom-color:var(--primary);font-weight:600}.admin-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow-sm)}.admin-card h3{margin:0 0 6px;font-size:15px}.admin-card h4{margin:18px 0 8px;font-size:13px;color:var(--text-dim)}.admin-hint{font-size:12px;color:var(--text-dim);margin:0 0 14px}.admin-loading{color:var(--text-dim);padding:40px;text-align:center}.admin-field{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--text-dim);margin-bottom:12px}.admin-field input{border:1px solid var(--border-strong);border-radius:6px;padding:8px 10px;font-size:13px;background:var(--surface);color:var(--text)}.admin-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}.admin-actions{display:flex;align-items:center;gap:12px;margin-top:6px}.admin-msg{font-size:13px;color:var(--primary)}.admin-error{color:var(--danger);font-size:13px}.admin-toolbar{display:flex;gap:10px;margin-bottom:12px}.admin-toolbar input{min-width:220px}.admin-table{width:100%;border-collapse:collapse;font-size:13px}.admin-table th{text-align:left;font-size:12px;color:var(--text-dim);font-weight:600;padding:8px 10px;border-bottom:1px solid var(--border);white-space:nowrap}.admin-table td{padding:8px 10px;border-bottom:1px solid var(--border);vertical-align:middle}.admin-table tr.clickable:hover{background:var(--surface-muted);cursor:pointer}.admin-table .ellipsis{max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.admin-table .mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px}.admin-pager{display:flex;align-items:center;gap:14px;justify-content:flex-end;margin-top:12px;font-size:13px;color:var(--text-dim)}.admin-actions-cell{white-space:nowrap}.admin-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:12px 0}.stat-card{background:var(--surface-muted);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px;text-align:center}.stat-num{font-size:22px;font-weight:700;letter-spacing:-.02em}.stat-label{font-size:12px;color:var(--text-dim);margin-top:2px}.stat-bars{display:flex;align-items:flex-end;gap:6px;height:120px;padding:8px 0}.stat-bar-item{flex:1;display:flex;flex-direction:column;align-items:center;height:100%;justify-content:flex-end}.stat-bar{width:100%;max-width:34px;background:var(--primary);border-radius:3px 3px 0 0;min-height:2px;opacity:.85}.stat-bar-label{font-size:10px;color:var(--text-dim);margin-top:4px}.level{font-size:11px;padding:1px 7px;border-radius:999px}.level-info{background:color-mix(in srgb,var(--primary) 12%,transparent);color:var(--primary)}.level-warn{background:#f59e0b1f;color:#d97706}.level-error{background:var(--danger-bg);color:var(--danger)}.admin-login{display:grid;place-items:center;min-height:70vh}.admin-login-card{display:flex;flex-direction:column;gap:12px;width:320px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-md)}.admin-login-card h2{margin:0 0 6px;font-size:16px;text-align:center}.admin-login-card input{border:1px solid var(--border-strong);border-radius:6px;padding:9px 11px;font-size:14px;background:var(--surface);color:var(--text)}.admin-modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:grid;place-items:center;z-index:60}.admin-modal-card{background:var(--surface);border-radius:var(--radius);padding:22px;width:min(680px,92vw);max-height:86vh;overflow:auto}.admin-detail{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:6px 18px;margin:10px 0;font-size:13px}.admin-detail dt{color:var(--text-dim);display:inline}.admin-detail dd{display:inline;margin:0 0 0 6px;word-break:break-all}.admin-detail-img{max-width:100%;max-height:220px;border:1px solid var(--border);border-radius:6px;margin:10px 0;background:#fff}.admin-latex{background:var(--surface-muted);border:1px solid var(--border);border-radius:6px;padding:10px 12px;font-size:12px;white-space:pre-wrap;word-break:break-all;max-height:180px;overflow:auto}@media (max-width: 900px){.app{padding:0 16px}.header{margin:0 -16px;padding:0 16px;height:54px}.badges{display:none}.main{grid-template-columns:1fr;padding-top:14px}.dropzone{flex:none;height:clamp(200px,34vh,300px)}.preview,.editor{height:clamp(170px,30vh,280px)}}.provider-list{display:flex;flex-direction:column;gap:12px;margin-top:14px}.provider-card{border:1px solid var(--border);border-radius:10px;padding:14px 16px;background:var(--bg-card)}.provider-card.active{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.provider-card-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}.provider-title{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.provider-name{font-weight:600;font-size:15px}.provider-badge{font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid var(--border);color:var(--text-dim)}.provider-badge.active{background:var(--accent);border-color:var(--accent);color:#fff}.provider-badge.type-engine{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 40%,transparent)}.provider-meta{display:flex;gap:24px;flex-wrap:wrap;margin:10px 0 0}.provider-meta>div{display:flex;gap:6px;align-items:baseline;min-width:0}.provider-meta dt{color:var(--text-dim);font-size:12px}.provider-meta dd{font-size:13px;margin:0;min-width:0}.provider-form{border:1px dashed var(--border);border-radius:10px;padding:16px;margin-bottom:16px;background:var(--bg-card)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 14px;margin-top:10px}.form-grid label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--text-dim)}.form-grid .span2{grid-column:span 2}.form-grid input,.form-grid select{padding:7px 10px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font-size:13px}.form-hint{font-size:11px;color:var(--text-dim)}.form-check{display:flex;align-items:center;gap:6px;margin-top:12px;font-size:13px}.form-actions{display:flex;gap:8px;margin-top:12px}.engine-models{border-top:1px dashed var(--border);margin-top:12px;padding-top:10px}.engine-models h5{margin:2px 0 8px;color:var(--text-dim);font-weight:500}.row-sub{display:block;font-size:11px;color:var(--text-dim)}.admin-table.compact th,.admin-table.compact td{padding:5px 8px;font-size:12.5px}@media (max-width: 640px){.form-grid{grid-template-columns:1fr}.form-grid .span2{grid-column:span 1}}