:root{color-scheme:light;--bg:#f4f6fa;--surface:#fff;--surface2:#f8f9fc;--ink:#1c2940;--muted:#727e93;--border:#e1e6ef;--accent:#2965e8;--accent-soft:#edf3ff;--selected:#e7efff;--code-bg:#152137;--code-text:#d4e1f7;--shadow:0 12px 36px #162d5510;font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px}
:root[data-theme=dark]{color-scheme:dark;--bg:#101621;--surface:#192231;--surface2:#1d2839;--ink:#e5ecf7;--muted:#a0aec3;--border:#303e52;--accent:#7ca5ff;--accent-soft:#253857;--selected:#293e61;--code-bg:#0d1420;--code-text:#d3e1f7;--shadow:0 12px 36px #0002}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.5}button,input,select,textarea{font:inherit}button,select{cursor:pointer}button{border:1px solid var(--border);border-radius:7px;background:var(--surface);color:var(--ink);padding:8px 14px;font-size:.875rem;white-space:nowrap;transition:background .15s,border-color .15s}button:hover{background:var(--accent-soft);border-color:var(--accent)}button:disabled{opacity:.36;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.primary{background:var(--accent);border-color:var(--accent);color:#fff}:root[data-theme=dark] .primary{color:#101b2f}.primary:hover{background:#1c53cf;color:white}input,select,textarea{color:var(--ink);background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:7px 10px;min-width:0}input[type=checkbox]{accent-color:var(--accent);width:15px;height:15px}label{display:inline-flex;align-items:center;gap:7px;font-size:.875rem}.topbar{min-height:76px;padding:0 3.2%;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);background:var(--surface);gap:20px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-size:1.2rem;font-weight:700;letter-spacing:-.5px}.brand-icon{width:36px;height:36px;display:grid;place-items:center;background:var(--accent);color:white;border-radius:9px;font-size:28px;font-weight:400}.brand-cn{font-size:.875rem;font-weight:400;color:var(--muted);margin-left:15px;padding-left:15px;border-left:1px solid var(--border);letter-spacing:1px}.header-actions{display:flex;align-items:center;gap:20px}.local-label{font-size:.8125rem;color:var(--muted)}.theme-label{padding:3px 9px;border:1px solid var(--border);border-radius:7px}.theme-label select{border:0;padding:5px 0;background:transparent}.icon-btn{border-radius:50%;width:29px;height:29px;padding:0;color:var(--muted)}main{max-width:1640px;margin:auto;padding:34px 3.2% 0}.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.eyebrow{font-size:.6875rem;letter-spacing:2px;color:var(--accent);font-weight:700;margin:0 0 6px}h1{font-size:1.65rem;font-weight:650;letter-spacing:.3px;margin:0}.file-actions{display:flex;gap:9px}.formats{display:flex;gap:5px;align-items:center;border-bottom:1px solid var(--border);margin-bottom:20px;overflow:auto}.formats button{border:0;border-radius:6px 6px 0 0;background:transparent;color:var(--muted);padding:12px 20px 14px;border-bottom:3px solid transparent}.formats button[aria-pressed=true]{color:var(--accent);border-bottom-color:var(--accent);background:var(--accent-soft);font-weight:600}.format-symbol{font-weight:700;margin-right:9px;font-family:Georgia,serif}.format-trail{margin-left:auto;color:var(--muted);font-size:.8125rem;white-space:nowrap;padding:0 6px}.panel{min-width:0;background:var(--surface);border:1px solid var(--border);border-radius:11px;box-shadow:var(--shadow);overflow:hidden}.toolbar{padding:12px 14px;display:flex;align-items:center;flex-wrap:wrap;gap:10px;border-bottom:1px solid var(--border)}.tool-group{display:flex;gap:3px;padding-right:10px;border-right:1px solid var(--border)}.toolbar button{padding:5px 9px;border-color:transparent;font-size:.875rem;background:transparent;min-height:32px}.toolbar button:hover,.toolbar button.active{background:var(--accent-soft);color:var(--accent)}.tool-group:first-child button{font-size:1.25rem;padding:1px 9px}.tiny{font-size:.75rem;padding-left:4px}.toolbar-end{margin-left:auto;display:flex;align-items:center;gap:17px}.toolbar select{border:0;background:var(--surface2)}.formula-bar{display:flex;align-items:center;min-height:44px;border-bottom:1px solid var(--border);font-size:.875rem}.formula-bar #cellRef{min-width:80px;text-align:center;font-family:monospace;color:var(--accent);padding:11px 9px;border-right:1px solid var(--border)}.fx{padding:0 16px;color:var(--muted);font:italic 16px Georgia,serif}.formula-bar input{border:0;border-radius:0;flex:1;width:100%;outline-offset:-3px;background:transparent}.formula-note{font-size:.75rem;white-space:nowrap;color:var(--muted);padding-right:18px}.grid-wrap{min-height:306px;max-height:470px;overflow:auto;padding:0 0 30px;background:var(--surface);outline-offset:-2px!important}#grid{border-collapse:separate;border-spacing:0;min-width:100%;table-layout:fixed;font-size:.9375rem;user-select:none}#grid th{background:var(--surface2);color:var(--muted);font-weight:400;font-size:.75rem;min-width:44px;height:31px;position:sticky;top:0;z-index:2}#grid th:first-child{left:0;z-index:3;width:44px;min-width:44px}#grid td{height:48px;min-width:150px;max-width:360px;position:relative;cursor:cell;white-space:pre-wrap;overflow-wrap:anywhere;vertical-align:middle}#grid th,#grid td{border-right:1px solid var(--border);border-bottom:1px solid var(--border);padding:10px 16px}#grid tbody th{left:0;z-index:1;width:44px;cursor:pointer;padding:8px}#grid thead th{cursor:pointer;padding:6px 16px}#grid td.selected{background:var(--selected)}#grid td.anchor{box-shadow:inset 0 0 0 2px var(--accent);z-index:1}#grid td.header-cell{font-weight:600}#grid td .cell-editor{position:absolute;inset:0;width:100%;height:100%;min-height:48px;padding:10px 16px;resize:none;z-index:4;border:2px solid var(--accent);border-radius:0;outline:none;background:var(--surface);user-select:text}.editor-status{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--surface2);border-top:1px solid var(--border);color:var(--muted);font-size:.75rem;padding:9px 18px}.editor-status b{font-weight:500;color:var(--ink)}.status-divider{margin:0 12px;color:var(--border)}.output-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px;margin-top:25px}.panel-heading{display:flex;justify-content:space-between;align-items:center;padding:15px 20px;min-height:63px;border-bottom:1px solid var(--border);gap:12px}.panel-heading h2{font-size:.9375rem;font-weight:600;margin:0;display:flex;gap:10px;align-items:center}.section-number{font-size:.6875rem;color:var(--muted);font-family:monospace;letter-spacing:1px}.live-badge{font-size:.75rem;color:var(--accent);background:var(--accent-soft);padding:4px 9px;border-radius:5px}.extension{font-family:monospace;font-size:.75rem;color:var(--muted);font-weight:400;background:var(--surface2);padding:2px 6px;border-radius:4px}.panel-heading button{padding:5px 10px}.preview-paper{padding:32px 28px;min-height:281px;max-height:420px;overflow:auto;display:block}.preview-table{border-collapse:collapse;width:100%;font-size:.9375rem}.preview-table td,.preview-table th{padding:9px 15px;white-space:pre-wrap;overflow-wrap:anywhere;min-width:70px}.preview-table.booktabs{border-top:2px solid var(--ink);border-bottom:2px solid var(--ink)}.preview-table.booktabs tr:first-child>*{border-bottom:1px solid var(--ink)}.preview-table.grid td,.preview-table.grid th{border:1px solid var(--border)}.preview-table.minimal tr:not(:last-child)>*{border-bottom:1px solid var(--border)}.preview-paper.latex .preview-table{font-family:Georgia,"Times New Roman","Noto Serif CJK SC",serif}.preview-text{margin:0;font:14px/1.8 "SFMono-Regular",Consolas,"Liberation Mono",monospace;white-space:pre;tab-size:4}.panel-foot{min-height:39px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;padding:9px 20px;color:var(--muted);font-size:.75rem;gap:15px}.code-output{margin:0;background:var(--code-bg);color:var(--code-text);padding:22px;min-height:281px;max-height:420px;overflow:auto;font:13px/1.85 "SFMono-Regular",Consolas,monospace;tab-size:4}.code-panel .panel-foot{background:var(--code-bg);color:#97a9c5;border-top-color:#28374c}footer{display:flex;gap:15px;align-items:center;padding:22px 2px 26px;color:var(--muted);font-size:.75rem;flex-wrap:wrap}footer>span:first-child{margin-right:auto;font-size:.6875rem;letter-spacing:.5px}.footer-slash{margin:0 9px}footer button{border:0;background:transparent;padding:3px;font-size:.8125rem;color:var(--muted)}.footer-tip{font-size:.6875rem}.context-menu{position:fixed;z-index:30;min-width:240px;max-height:calc(100vh - 24px);overflow-y:auto;padding:6px;background:var(--surface);border:1px solid var(--border);border-radius:10px;box-shadow:0 12px 50px #0003;font-size:.875rem}.context-menu button{width:100%;display:flex;justify-content:space-between;gap:25px;border:0;background:transparent;padding:7px 12px;text-align:left}.context-menu button:hover,.context-menu button:focus{background:var(--accent-soft);outline:none}.context-menu kbd{font-family:inherit;color:var(--muted);font-size:.75rem}.context-menu .menu-label{padding:7px 12px 3px;color:var(--muted);font-size:.6875rem;border-top:1px solid var(--border);margin-top:4px}.context-menu details>summary{padding:7px 12px;cursor:pointer;list-style:none;border-radius:5px}.context-menu details>summary::after{content:'›';float:right}.context-menu details[open]>summary::after{content:'⌄'}.context-menu details>summary:hover{background:var(--accent-soft)}.context-menu details button{padding-left:23px}.context-menu .danger{color:#df5268}dialog{padding:25px;border:1px solid var(--border);border-radius:14px;background:var(--surface);color:var(--ink);width:min(640px,calc(100vw - 28px));box-shadow:0 30px 100px #0004;max-height:90vh;overflow:auto}dialog::backdrop{background:#12223f70;backdrop-filter:blur(3px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.dialog-heading h2{font-size:1.2rem;margin:0}.dialog-heading button{border:0;background:transparent;font-size:1.3rem;padding:0 6px}dialog p{font-size:.875rem;color:var(--muted);line-height:1.9}dialog textarea{width:100%;font:14px/1.7 Consolas,monospace;resize:vertical}.dialog-actions{display:flex;gap:9px;justify-content:flex-end;margin-top:22px}.size-fields{display:flex;gap:20px;margin:24px 0}.size-fields label{display:grid;flex:1}.size-fields input{width:100%}.import-summary{font-size:.8125rem;color:var(--muted);margin:9px 0 15px}.import-options{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.spacer{flex:1}.help-list{font-size:.875rem}.help-list dt{font-weight:600;margin-top:15px}.help-list dd{margin:4px 0;color:var(--muted);line-height:1.8}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--surface);font-size:.875rem;padding:11px 22px;box-shadow:var(--shadow);border-radius:8px;z-index:60;opacity:0;pointer-events:none;transition:opacity .15s,transform .15s;max-width:90vw;text-align:center}#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}[hidden]{display:none!important}
@media(min-width:1700px){main{padding-top:45px}.grid-wrap{min-height:355px}.preview-paper,.code-output{min-height:320px}}@media(max-width:1100px){.format-trail,.local-label,.formula-note{display:none}.toolbar-end{margin-left:0}.footer-tip{display:none}.formats button{padding:12px 16px}.brand-cn{display:none}}@media(max-width:760px){.topbar{padding:12px 18px;min-height:65px}.header-actions{gap:10px}.brand{font-size:1rem}.brand-icon{width:31px;height:31px}main{padding:25px 16px 0}.workspace-heading{align-items:flex-start;flex-direction:column;gap:18px;margin-bottom:20px}h1{font-size:1.4rem}.file-actions{width:100%;gap:7px}.file-actions button{flex:1;padding:9px}.formats button{padding:10px 13px}.format-symbol{display:none}.toolbar{padding:8px;gap:8px}.toolbar-end{flex-wrap:wrap;gap:8px}.toolbar label{font-size:.8125rem}.tool-group{padding-right:6px}.toolbar button{padding:5px 7px}.output-layout{grid-template-columns:1fr;gap:18px;margin-top:18px}.editor-status{align-items:flex-start;flex-direction:column;gap:3px}.preview-paper{padding:25px 16px}.panel-heading{padding:13px 16px}.code-output{padding:16px}.grid-wrap{min-height:290px}.header-actions .icon-btn{display:none}footer{gap:12px}footer>span:first-child{width:100%}.theme-label{padding:0 7px}.theme-label select{font-size:.8125rem}}