#fm-multi .fm-stage{box-sizing:border-box;justify-content:center;align-items:center;min-height:680px;padding:20px 8px;display:flex}#fm-multi .fm-app{--fm-paper:var(--lightningcss-light,#fff)var(--lightningcss-dark,#202020);--fm-ink:var(--lightningcss-light,#222)var(--lightningcss-dark,#eee);--fm-muted:var(--lightningcss-light,#6d6d6d)var(--lightningcss-dark,#b0b0b0);--fm-grid:var(--lightningcss-light,#eee)var(--lightningcss-dark,#303030);--fm-axis:var(--lightningcss-light,#b4b4b4)var(--lightningcss-dark,#888);--fm-green:var(--lightningcss-light,#252525)var(--lightningcss-dark,#eee);--fm-soft:var(--lightningcss-light,#ededed)var(--lightningcss-dark,#3a3a3a);--fm-line:var(--lightningcss-light,#ddd)var(--lightningcss-dark,#4d4d4d);--fm-orange:var(--lightningcss-light,#777)var(--lightningcss-dark,#bcbcbc);--fm-panel:var(--lightningcss-light,#fff)var(--lightningcss-dark,#292929);color:var(--fm-ink);background:var(--fm-paper);border:1px solid var(--fm-line);box-sizing:border-box;-webkit-user-select:none;user-select:none;border-radius:26px;width:100%;max-width:390px;height:632px;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px;line-height:1.5;position:relative;overflow:hidden;box-shadow:0 16px 50px #00000013;container-type:inline-size}#fm-multi .fm-app.fm-tablet{border-radius:20px;max-width:716px;height:560px}#fm-multi .fm-app *{box-sizing:border-box}#fm-multi .fm-app button{font:inherit;color:inherit;white-space:nowrap;background:0 0;border:0;border-radius:12px;justify-content:center;align-items:center;gap:7px;min-height:44px;padding:8px 12px;display:inline-flex}#fm-multi .fm-app button:disabled{opacity:.35}#fm-multi .fm-app button:hover{background:var(--fm-soft)}#fm-multi .fm-app button[aria-pressed=true]{background:var(--fm-soft);color:var(--fm-green)}#fm-multi .fm-top{border-bottom:1px solid var(--fm-grid);z-index:4;background:var(--fm-paper);align-items:center;gap:8px;height:66px;padding:0 15px;display:flex;position:relative}#fm-multi .fm-logo{background:var(--fm-green);width:30px;height:30px;color:var(--fm-paper);border-radius:10px;place-items:center;font:italic 500 22px Georgia,serif;display:grid}#fm-multi .fm-brand{letter-spacing:.2px;flex:1;font-weight:600;line-height:1.3}#fm-multi .fm-brand small{letter-spacing:1.1px;color:var(--fm-muted);margin-top:3px;font-size:10px;font-weight:400;display:block}#fm-multi .fm-top button{width:44px;padding:8px}#fm-multi .fm-board{touch-action:none;position:absolute;inset:66px 0 0}#fm-multi .fm-canvas{width:100%;height:100%;display:block;overflow:hidden}#fm-multi .fm-canvas text{fill:var(--fm-muted);paint-order:stroke;stroke:var(--fm-paper);stroke-width:5px;stroke-linejoin:round;font-family:inherit;font-size:12px}#fm-multi .fm-canvas text.fm-label{fill:var(--fm-ink);font-size:13px;font-weight:500}#fm-multi .fm-canvas .fm-graph{fill:none;stroke:var(--fm-green);stroke-width:2.8px;stroke-linecap:round;stroke-linejoin:round}#fm-multi .fm-canvas .fm-geometry{fill:var(--fm-soft);stroke:var(--fm-green);stroke-width:2.6px;stroke-linejoin:round}#fm-multi .fm-canvas .fm-inkline{fill:none;stroke:var(--fm-orange);stroke-width:2.4px;stroke-linecap:round;stroke-linejoin:round}#fm-multi .fm-formula{z-index:2;background:var(--fm-panel);border:1px solid var(--fm-line);pointer-events:none;border-radius:13px;align-items:center;gap:10px;max-width:calc(100% - 36px);padding:8px 13px;display:flex;position:absolute;top:84px;left:18px;box-shadow:0 3px 16px #0000000a}#fm-multi .fm-formula .fm-dot{background:var(--fm-green);border-radius:50%;width:7px;height:7px}#fm-multi .fm-equation{color:var(--fm-ink);font:italic 19px Georgia,Times New Roman,serif}#fm-multi .fm-tools{z-index:5;background:var(--fm-panel);border:1px solid var(--fm-line);border-radius:19px;align-items:center;gap:3px;max-width:calc(100% - 24px);padding:5px;display:flex;position:absolute;bottom:22px;left:50%;transform:translate(-50%);box-shadow:0 5px 25px #00000010}#fm-multi .fm-tools button{gap:6px;padding:10px 11px;font-size:13px}#fm-multi .fm-tools .fm-add{border-left:1px solid var(--fm-line);border-radius:0 12px 12px 0;width:44px;padding:8px}#fm-multi .fm-pop{z-index:8;background:var(--fm-panel);border:1px solid var(--fm-line);border-radius:18px;max-width:370px;margin:auto;padding:12px;position:absolute;bottom:90px;left:16px;right:16px;box-shadow:0 9px 40px #00000020}#fm-multi .fm-pop[hidden]{display:none}#fm-multi .fm-pop-head{color:var(--fm-muted);justify-content:space-between;align-items:center;padding-left:6px;font-size:13px;display:flex}#fm-multi .fm-options{grid-template-columns:repeat(3,1fr);gap:6px;display:grid}#fm-multi .fm-options button{background:var(--fm-paper);border:1px solid var(--fm-line);flex-direction:column;gap:7px;padding:14px 4px;font-size:12px}#fm-multi .fm-options em{color:var(--fm-green);font:italic 22px Georgia,serif}#fm-multi .fm-settings{width:220px;inset:72px 12px auto auto}#fm-multi .fm-settings label{justify-content:space-between;align-items:center;min-height:44px;padding:0 10px;font-size:13px;display:flex}#fm-multi .fm-settings input{accent-color:var(--fm-green);width:18px;height:18px}#fm-multi .fm-app .fm-tutorial{color:var(--fm-muted);border-top:1px solid var(--fm-line);margin:4px 0 0;padding:8px 9px 4px;font-size:12px}#fm-multi .fm-app .fm-status{letter-spacing:.5px;color:var(--fm-muted);font-size:10px;display:none;position:absolute;bottom:12px;left:18px}#fm-multi .fm-tablet .fm-status{display:block}#fm-multi .fm-tablet .fm-tools{bottom:20px}#fm-multi .fm-measure{stroke:var(--fm-orange);stroke-width:1.5px;fill:none}@container (width<=340px){#fm-multi .fm-tools{gap:0}#fm-multi .fm-tools button{padding:10px 9px;font-size:12px}#fm-multi .fm-top{padding:0 12px}}#fm-multi .fm-tools{gap:0;padding:5px;bottom:20px}#fm-multi .fm-tools button{flex-direction:column;gap:4px;min-width:47px;padding:7px 9px;font-size:11px;line-height:1.2}#fm-multi .fm-tools .fm-add{align-self:stretch;width:42px;min-width:42px}#fm-multi .fm-tools button[aria-pressed=true]{background:var(--fm-ink);color:var(--fm-paper)}#fm-multi .fm-tools svg{width:18px;height:18px}#fm-multi .fm-top .fm-count{width:auto;color:var(--fm-muted);padding:6px 8px;font-size:12px}#fm-multi .fm-formula{min-height:36px;padding:5px 11px;font-size:13px;top:80px}#fm-multi .fm-equation{font-size:16px}#fm-multi .fm-measure-bar{z-index:6;border:1px solid var(--fm-line);background:var(--fm-panel);white-space:nowrap;border-radius:12px;padding:3px;display:flex;position:absolute;bottom:101px;left:50%;transform:translate(-50%)}#fm-multi .fm-measure-bar button{min-height:38px;padding:8px 13px;font-size:12px}#fm-multi [hidden]{display:none!important}#fm-multi .fm-list{max-height:360px;top:74px;bottom:auto;overflow:auto}#fm-multi .fm-row{border-bottom:1px solid var(--fm-grid);align-items:center;gap:4px;min-height:48px;display:flex}#fm-multi .fm-row .fm-object{white-space:normal;text-align:left;flex:1;justify-content:flex-start;min-width:0;font-size:13px}#fm-multi .fm-row .fm-delete{color:var(--fm-muted);padding:8px;font-size:12px}#fm-multi .fm-row input{width:18px;height:18px;accent-color:var(--fm-ink);margin:12px}#fm-multi .fm-options button{gap:3px;padding:8px 4px}#fm-multi .fm-options em{font-size:20px}#fm-multi .fm-settings{width:230px;max-height:calc(100% - 84px);overflow-y:auto}#fm-multi .fm-settings button{justify-content:flex-start;min-width:100%;font-size:12px}#fm-multi .fm-canvas{touch-action:none}#fm-multi .fm-canvas .fm-selected{stroke-width:3px}#fm-multi .fm-canvas .fm-label{font-size:12px}#fm-multi .fm-canvas .fm-result{fill:var(--fm-ink);stroke-width:7px;font-size:13px;font-weight:600}#fm-multi .fm-canvas .fm-graph{stroke-width:1.8px}@container (width<=340px){#fm-multi .fm-top{gap:4px;padding:0 10px}#fm-multi .fm-brand{font-size:13px}#fm-multi .fm-brand small{letter-spacing:.3px;font-size:9px}#fm-multi .fm-logo{width:27px;height:27px}#fm-multi .fm-tools button{min-width:45px;padding:7px}#fm-multi .fm-count{padding:5px!important}}#fm-multi .fm-app{--fm-object-0:var(--lightningcss-light,#2563eb)var(--lightningcss-dark,#82b1ff);--fm-object-1:var(--lightningcss-light,#c46a13)var(--lightningcss-dark,#f5b76b);--fm-object-2:var(--lightningcss-light,#8454ce)var(--lightningcss-dark,#b6a0f2);--fm-object-3:var(--lightningcss-light,#0c847c)var(--lightningcss-dark,#66c5ba);--fm-object-4:var(--lightningcss-light,#c14c72)var(--lightningcss-dark,#f399b7);--fm-object-5:var(--lightningcss-light,#787c1b)var(--lightningcss-dark,#c7ce7d)}#fm-multi .fm-color-chip{background:var(--fm-ink);border-radius:50%;flex-shrink:0;width:8px;height:8px;display:inline-block}#fm-multi .fm-formula{align-items:flex-start;gap:9px;padding:9px 12px}#fm-multi .fm-formula>.fm-color-chip{margin-top:7px}#fm-multi .fm-selection-body{flex-direction:column;gap:3px;min-width:0;display:flex}#fm-multi .fm-point-info{font-variant-numeric:tabular-nums;overflow-wrap:anywhere;font-size:14px;font-weight:500;line-height:1.5}#fm-multi .fm-equation{white-space:normal;overflow-wrap:anywhere;line-height:1.4}#fm-multi .fm-formula.has-point .fm-equation{color:var(--fm-muted);font-size:14px}#fm-multi .fm-mode-bar{z-index:6;border:1px solid var(--fm-line);background:var(--fm-panel);white-space:nowrap;border-radius:12px;align-items:center;max-width:calc(100% - 24px);padding:3px;display:flex;position:absolute;bottom:101px;left:50%;transform:translate(-50%)}#fm-multi .fm-mode-bar button{min-height:44px;padding:7px 10px;font-size:12px}#fm-multi .fm-mode-bar span{padding:0 9px;font-size:12px}#fm-multi .fm-move-pop{gap:4px;max-width:240px;padding:6px;display:flex}#fm-multi .fm-move-pop button{flex:1;font-size:13px}#fm-multi .fm-hint{clip-path:inset(50%);white-space:nowrap;pointer-events:none;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}#fm-multi .fm-app.dragging-geometry .fm-tools,#fm-multi .fm-app.dragging-geometry .fm-mode-bar,#fm-multi .fm-app.dragging-geometry .fm-measure-bar,#fm-multi .fm-app.dragging-geometry .fm-formula{visibility:hidden;pointer-events:none}#fm-multi .fm-app.controls-top .fm-mode-bar,#fm-multi .fm-app.controls-top .fm-measure-bar{top:146px;bottom:auto}#fm-multi .fm-app.controls-top .fm-formula{top:146px}#fm-multi .fm-zoom-row{border-bottom:1px solid var(--fm-line);justify-content:space-between;align-items:center;gap:4px;padding:0 6px;display:flex}#fm-multi .fm-settings .fm-zoom-row button{justify-content:center;width:44px;min-width:44px;padding:8px;font-size:18px}#fm-multi .fm-zoom-value{text-align:center;font-variant-numeric:tabular-nums;min-width:46px;font-size:12px}#fm-multi .fm-tools .fm-add{width:44px;min-width:44px}@container (width<=340px){#fm-multi .fm-tools button{min-width:44px}}:root{color:#222;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-synthesis:none;background:#fff;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box;touch-action:manipulation}body{overscroll-behavior:none;margin:0}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible{outline-offset:3px;outline:2px solid #555}button:disabled{cursor:default}#fm-multi{width:100%;height:100vh;height:100dvh;overflow:hidden}#fm-multi .fm-app{--fm-paper:#fff;--fm-ink:#222;--fm-muted:#666;--fm-grid:#eee;--fm-axis:#aaa;--fm-green:#222;--fm-soft:#ededed;--fm-line:#ddd;--fm-orange:#777;--fm-panel:#fff;--fm-object-0:#2563eb;--fm-object-1:#c46a13;--fm-object-2:#8454ce;--fm-object-3:#0c847c;--fm-object-4:#c14c72;--fm-object-5:#787c1b;--fm-top-height:calc(58px + env(safe-area-inset-top));width:100%;max-width:none;height:100%;box-shadow:none;border:0;border-radius:0}#fm-multi .fm-top{height:var(--fm-top-height);padding:env(safe-area-inset-top) max(12px, env(safe-area-inset-right)) 0 max(12px, env(safe-area-inset-left));gap:4px}#fm-multi .fm-board{top:var(--fm-top-height)}#fm-multi .fm-top .fm-brand{text-align:left;flex-direction:column;flex:1;justify-content:center;align-items:flex-start;gap:2px;width:auto;min-width:0;padding:5px 8px;font-weight:600;display:flex}#fm-multi .fm-draft-title{text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:14px;overflow:hidden}#fm-multi .fm-draft-title:after{content:" ▾";color:#777;font-size:10px}#fm-multi .fm-save-status{letter-spacing:0;white-space:nowrap;margin:0;font-size:10px;font-weight:400}#fm-multi .fm-tools{bottom:calc(16px + env(safe-area-inset-bottom));gap:2px;max-width:calc(100% - 16px)}#fm-multi .fm-tools button{min-width:48px;min-height:54px;padding:6px 11px;font-size:12px}#fm-multi .fm-pop{bottom:calc(94px + env(safe-area-inset-bottom));max-height:calc(100% - var(--fm-top-height) - 110px - env(safe-area-inset-bottom));overflow-y:auto}#fm-multi .fm-settings,#fm-multi .fm-list{top:calc(var(--fm-top-height) + 8px);max-height:calc(100% - var(--fm-top-height) - 24px - env(safe-area-inset-bottom));bottom:auto}#fm-multi .fm-mode-bar,#fm-multi .fm-measure-bar{bottom:calc(96px + env(safe-area-inset-bottom))}#fm-multi .fm-formula{top:calc(var(--fm-top-height) + 12px);max-width:calc(100% - 24px);left:12px}#fm-multi .fm-app.controls-top .fm-tools{top:calc(var(--fm-top-height) + 8px);bottom:auto}#fm-multi .fm-app.controls-top .fm-mode-bar,#fm-multi .fm-app.controls-top .fm-measure-bar,#fm-multi .fm-app.controls-top .fm-formula{top:calc(var(--fm-top-height) + 82px);bottom:auto}#fm-multi .fm-app.controls-top.extra-tools .fm-formula,#fm-multi .fm-app.controls-top.measuring .fm-formula{top:calc(var(--fm-top-height) + 138px)}#fm-multi .fm-app.controls-top .fm-move-pop,#fm-multi .fm-app.controls-top .fm-add-pop{top:calc(var(--fm-top-height) + 82px);bottom:auto}#fm-notice{z-index:100;top:calc(68px + env(safe-area-inset-top));color:#fff;pointer-events:none;background:#222;border:1px solid #ccc;border-radius:12px;width:max-content;max-width:calc(100% - 24px);padding:12px 16px;font-size:13px;position:fixed;left:50%;transform:translate(-50%);box-shadow:0 4px 20px #0002}[hidden]{display:none!important}dialog{width:min(480px,100% - 24px);max-height:calc(100dvh - 32px - env(safe-area-inset-top) - env(safe-area-inset-bottom));color:#222;background:#fff;border:1px solid #ddd;border-radius:20px;padding:20px;overflow:auto;box-shadow:0 20px 80px #0002}dialog::backdrop{background:#0004}.dialog-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}dialog h1{margin:0;font-size:18px}dialog h2{margin:20px 0 8px;font-size:14px}dialog button{color:#222;background:#f4f4f4;border:1px solid #ddd;border-radius:10px;min-height:44px;padding:8px 12px}.dialog-head button{background:0 0;border:0;width:44px;font-size:26px}dialog label{color:#666;font-size:12px}.name-row{gap:8px;margin:6px 0 16px;display:flex}.name-row input{border:1px solid #ccc;border-radius:10px;flex:1;width:0;min-height:44px;padding:8px;font-size:16px}.name-row button{flex-shrink:0}.file-actions{grid-template-columns:1fr 1fr;gap:8px;display:grid}.storage-note,dialog p,dialog footer{color:#666;font-size:12px;line-height:1.7}.draft-row{border-top:1px solid #eee;align-items:center;gap:8px;display:flex}dialog .draft-open{text-align:left;background:0 0;border:0;flex-direction:column;flex:1;gap:4px;min-width:0;padding:12px 4px;display:flex}.draft-open span{overflow-wrap:anywhere;max-width:100%;font-size:14px}.draft-open small{color:#777;font-size:11px}dialog .draft-delete{background:0 0;border:0;font-size:12px}dialog footer{border-top:1px solid #eee;justify-content:space-between;align-items:center;margin-top:16px;padding-top:8px;display:flex}dialog footer button{background:0 0;border:0;font-size:12px}#help-dialog ul{padding-left:20px;font-size:14px;line-height:1.8}#help-dialog li{margin:10px 0}@media (max-width:360px){#fm-multi .fm-top{gap:0;padding-left:6px;padding-right:6px}#fm-multi .fm-tools{gap:0}#fm-multi .fm-tools button{min-width:44px;padding:6px 7px}dialog{padding:16px}}@media (max-height:480px) and (orientation:landscape){#fm-multi .fm-tools{bottom:8px;left:auto;right:12px;transform:none}#fm-multi .fm-pop{bottom:80px}#fm-multi .fm-settings,#fm-multi .fm-list{bottom:auto}#fm-multi .fm-formula{max-width:45%}#fm-multi .fm-mode-bar,#fm-multi .fm-measure-bar{bottom:82px;left:auto;right:12px;transform:none}}#dialog-notice{color:#222;background:#f3f3f3;border:1px solid #ccc;border-radius:10px;padding:10px 12px;font-size:13px}