:root{--md-ui-size-xs:28px;--md-ui-size-sm:32px;--md-ui-size-md:36px;--md-ui-size-lg:48px;--stitch-control-size:var(--md-ui-size-lg);--stitch-control-font-size:14px;--stitch-control-icon-size:18px;--stitch-control-surface:rgb(0 0 0 / .035);--md-ui-rainbow-edge:linear-gradient(90deg,#ff4242,#a1ff42,#42a1ff,#42d0ff,#a142ff)}.md-ui-button[data-ui-size=xs]{--stitch-control-size:var(--md-ui-size-xs);--stitch-control-font-size:12px}.md-ui-button[data-ui-size=sm]{--stitch-control-size:var(--md-ui-size-sm);--stitch-control-font-size:12px}.md-ui-button[data-ui-size=md]{--stitch-control-size:var(--md-ui-size-md)}.md-ui-button[data-ui-size=lg]{--stitch-control-size:var(--md-ui-size-lg)}.md-select-host{display:inline-flex;min-width:0;max-width:100%}.md-select-host>[data-ui-component=select]{max-width:100%}.md-select-host .md-ui-button-label{overflow:hidden;text-overflow:ellipsis}.md-ui-button[data-ui-component=select][data-ui-size]{width:auto;min-width:0;padding-inline:10px;gap:6px}.md-ui-button[data-ui-component=select]>.md-ui-button-label{display:inline}:root{--md-ui-dialog-sm:400px;--md-ui-dialog-md:460px;--md-ui-dialog-lg:640px}@keyframes stitch-menu-in{0%{opacity:0;transform:translateY(4px) scale(.97)}to{opacity:1;transform:none}}@keyframes stitch-busy{to{transform:rotate(360deg)}}:is(.entry-button,.md-ui-button--primary):not(.md-ui-button--brand){--stitch-send-top:#3d3d46;--stitch-send-bottom:#24242b;box-sizing:border-box;font-family:inherit;cursor:pointer;border:1px solid #25252d;border-radius:9999px;corner-shape:round;padding:10px 23px;color:#fff;background:linear-gradient(var(--stitch-send-top),var(--stitch-send-bottom));box-shadow:inset 0 1px #ffffff30,inset 0 -2px #0005;font-size:13px;line-height:20px;transform:none;transition:--stitch-send-top .32s ease,--stitch-send-bottom .32s ease,border-color .32s ease,color .2s ease,box-shadow .15s ease}:is(.entry-button,.md-ui-button--primary):not(.md-ui-button--brand):not(:disabled):is(:hover,:focus-visible),button:focus-visible .md-ui-button--primary{--stitch-send-top:var(--md-ui-primary-hover, #0047ff);--stitch-send-bottom:var(--md-ui-primary-hover, #0047ff);border-color:var(--md-ui-primary-hover, #0047ff);color:var(--md-ui-primary-hover-ink, #fff)}:is(.entry-button,.md-ui-button--primary):not(.md-ui-button--brand):focus-visible{outline:2px solid var(--md-ui-primary-hover, #0047ff);outline-offset:3px}:is(.entry-button,.md-ui-button--primary):not(.md-ui-button--brand):not(:disabled):active,button:active .md-ui-button--primary{box-shadow:inset 0 1px 2px #0003,inset 0 -1px #0005}:is(.entry-button,.md-ui-button--primary):not(.md-ui-button--brand):disabled{color:#9b9ba3;background:#e8e8eb;border-color:transparent;box-shadow:inset 0 1px #ffffffa6,inset 0 -1px #00000014;opacity:1;cursor:default}@property --entry-login-surface{syntax:"<color>"; inherits:false; initial-value:#202020;}.md-ui-button--brand{--entry-login-surface:#202020;--entry-login-rainbow:var(--entry-rainbow-edge,var(--md-ui-rainbow-edge));box-sizing:border-box;font-family:inherit;cursor:pointer;position:relative;z-index:1;isolation:isolate;display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;width:104px;min-width:104px;height:48px;padding:10px 24px;overflow:visible;border:2px solid transparent;border-radius:9999px;corner-shape:round;background-image:linear-gradient(var(--entry-login-surface),var(--entry-login-surface)),linear-gradient(var(--entry-login-surface) 30%,transparent),var(--entry-login-rainbow);background-color:transparent;background-size:200%;background-origin:border-box;background-clip:padding-box,border-box,border-box;color:#fff;font-size:16px;font-weight:500;line-height:24px;white-space:nowrap;box-shadow:none;animation:entry-login-rainbow 2s linear infinite;transition:--entry-login-surface .2s ease,box-shadow .18s ease,transform .18s ease}.md-ui-button--brand:before{content:"";position:absolute;z-index:-1;left:0;bottom:-20%;display:block;width:100%;height:20%;border-radius:inherit;corner-shape:inherit;background-image:var(--entry-login-rainbow);background-size:200%;opacity:.72;filter:blur(10px);animation:entry-login-rainbow 2s linear infinite;transition:opacity .18s ease,transform .18s ease;pointer-events:none}.md-ui-button--brand:not(:disabled):hover,.md-ui-button--brand:not(:disabled):focus-visible{--entry-login-surface:#0047ff;transform:translateY(-2px);box-shadow:none}.md-ui-button--brand:not(:disabled):hover:before,.md-ui-button--brand:not(:disabled):focus-visible:before{opacity:.94;transform:translateY(2px) scaleX(1.06)}.md-ui-button--brand:focus-visible{outline:2px solid #0047ff;outline-offset:4px}.md-ui-button--brand:not(:disabled):active{transform:translateY(1px);box-shadow:none}.md-ui-button--brand:not(:disabled):active:before{opacity:.64;transform:scaleX(.96)}.md-ui-button--brand:disabled{opacity:.45;cursor:default;animation-play-state:paused}.md-ui-button--brand:disabled:before{opacity:.4;animation-play-state:paused}.md-corner-brand-surface,.md-corner-brand-glow{display:none}@supports (border-shape:path("M 0 0 H 20 V 20 H 0 Z")){.md-ui-button--brand[data-md-corner-fit]{--md-brand-fill:var(--entry-login-surface);border-shape:none;background-image:none;background-color:transparent}.md-ui-button--brand[data-md-corner-fit]:before{display:none}.md-ui-button--brand[data-md-corner-fit]:after{content:"";position:absolute;z-index:-2;inset:calc(-1 * var(--md-capsule-border));border-radius:inherit;border-shape:var(--md-capsule-outline);background-image:linear-gradient(var(--md-brand-fill) 30%,transparent),var(--entry-login-rainbow);background-size:200%;animation:entry-login-rainbow 2s linear infinite;animation-play-state:inherit;pointer-events:none}.md-ui-button--brand[data-md-corner-fit]>.md-corner-brand-surface{display:block;position:absolute;z-index:-1;top:0;right:0;bottom:0;left:0;border-radius:inherit;border-shape:var(--md-capsule-inner);background:var(--md-brand-fill);pointer-events:none}.md-ui-button--brand[data-md-corner-fit]>.md-corner-brand-glow{display:block;position:absolute;z-index:-3;inset:calc(-1 * var(--md-capsule-border));translate:0 20%;filter:blur(10px);opacity:.72;animation-play-state:inherit;transition:opacity .18s ease,transform .18s ease;pointer-events:none}.md-corner-brand-glow:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-shape:var(--md-capsule-outline);background-image:var(--entry-login-rainbow);background-size:200%;-webkit-mask-image:linear-gradient(transparent 70%,#000 90%);mask-image:linear-gradient(transparent 70%,#000 90%);animation:entry-login-rainbow 2s linear infinite;animation-play-state:inherit}.md-ui-button--brand[data-md-corner-fit]:not(:disabled):is(:hover,:focus-visible)>.md-corner-brand-glow{opacity:.94;transform:translateY(2px) scaleX(1.06)}.md-ui-button--brand[data-md-corner-fit]:not(:disabled):active>.md-corner-brand-glow{opacity:.64;transform:scaleX(.96)}.md-ui-button--brand[data-md-corner-fit]:focus-visible{outline:none}.md-ui-button--brand[data-md-corner-fit]:focus-visible:after{outline:2px solid #0047ff;outline-offset:4px}.md-ui-button--brand[data-md-corner-fit]:disabled:after,.md-ui-button--brand:disabled>.md-corner-brand-glow:before{animation-play-state:paused}.md-ui-button--brand:disabled>.md-corner-brand-glow{opacity:.4}}.md-ui-button--brand-white{--entry-login-surface:#fff;width:auto;color:#1c1f2e;transition:--entry-login-surface .2s ease,color .2s ease,box-shadow .18s ease,transform .18s ease}.md-ui-button--brand-white:not(:disabled):hover,.md-ui-button--brand-white:not(:disabled):focus-visible{--entry-login-surface:#fff;color:#1c1f2e}@keyframes entry-login-rainbow{0%{background-position:0}to{background-position:200%}}@media(prefers-reduced-motion:reduce){.md-ui-button--brand,.md-ui-button--brand:before,.md-ui-button--brand:after,.md-corner-brand-glow,.md-corner-brand-glow:before{animation:none!important;transition:none!important;background-position:50%}.md-ui-button--brand:not(:disabled):hover,.md-ui-button--brand:not(:disabled):focus-visible,.md-ui-button--brand:not(:disabled):active,.md-ui-button--brand:not(:disabled):hover:before,.md-ui-button--brand:not(:disabled):focus-visible:before,.md-ui-button--brand:not(:disabled):active:before,.md-ui-button--brand[data-md-corner-fit]:not(:disabled):is(:hover,:focus-visible,:active)>.md-corner-brand-glow{transform:none}}.stitch-tool{position:relative;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:var(--stitch-control-size);height:var(--stitch-control-size);padding:0;border:0;border-radius:50%;corner-shape:round;background:transparent;color:#666570;font:inherit;cursor:pointer;transition:background-color .15s,color .15s,transform .15s cubic-bezier(.2,.8,.2,1),box-shadow .15s;-webkit-tap-highlight-color:transparent}.stitch-tool svg,.stitch-modes svg,.stitch-popover svg,.md-ui-menu-image{display:block;flex-shrink:0}.md-ui-menu-image{object-fit:contain}.stitch-tool:not(.stitch-send)>svg:first-child,.stitch-modes svg{width:var(--stitch-control-icon-size);height:var(--stitch-control-icon-size)}.stitch-tool:hover,.stitch-tool[aria-expanded=true]{background:#67616d0c;color:#303038}.stitch-tool:active{transform:scale(.94);background:#67616d17}.stitch-tool:focus-visible,.stitch-modes button:focus-visible,.stitch-popover button:not(.md-ui-button--primary):focus-visible{outline:2px solid #aa97c9;outline-offset:3px}.stitch-tool:disabled{cursor:default;opacity:.38;background:transparent;transform:none}.stitch-tool.md-ui-icon-strong{color:#303030}.stitch-tool.md-ui-icon-strong:hover,.stitch-tool.md-ui-icon-strong[aria-expanded=true]{color:#141414}.stitch-tool.md-ui-icon-strong>svg:first-child{width:clamp(22px,calc(var(--stitch-control-size) * .5 + 2px),26px);height:clamp(22px,calc(var(--stitch-control-size) * .5 + 2px),26px)}.stitch-modes{box-sizing:border-box;display:flex;flex-shrink:0;align-items:stretch;gap:2px;position:relative;isolation:isolate;height:var(--stitch-control-size);padding:3px;border:0;border-radius:9999px;corner-shape:round;background:var(--stitch-control-surface)}.stitch-mode-indicator{position:absolute;top:3px;left:3px;border-radius:9999px;corner-shape:round;background:#ffffffc7;border:0;box-shadow:0 1px 4px #1c1f2e1a;pointer-events:none;opacity:0;transition:transform .22s cubic-bezier(.33,1,.68,1),width .22s cubic-bezier(.33,1,.68,1)}.stitch-modes button{box-sizing:border-box;position:relative;z-index:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:0 12px;border:0;border-radius:9999px;corner-shape:round;min-width:66px;min-height:0;background:transparent;color:#666570;font:inherit;font-size:var(--stitch-control-font-size);line-height:20px;white-space:nowrap;cursor:pointer;transition:background .16s,color .16s}.stitch-modes button:hover{background:#0000000f;color:#303038}.stitch-modes button[aria-checked=true]{background:transparent;color:#303038}.stitch-modes button:active{background:#00000014}.stitch-modes button:focus-visible{outline-color:#666570;outline-offset:2px}.stitch-modes button:disabled{cursor:default;opacity:.5}.stitch-task-picker{width:auto;border-radius:9999px;corner-shape:round;gap:6px;padding:0 13px;font-size:var(--stitch-control-font-size);line-height:20px;background:var(--stitch-control-surface);box-shadow:none}.stitch-task-picker:hover,.stitch-task-picker[aria-expanded=true]{background:#0000000f}.stitch-task-picker:active{background:#00000014}@property --stitch-send-top{syntax:"<color>"; inherits:false; initial-value:#3d3d46;}@property --stitch-send-bottom{syntax:"<color>"; inherits:false; initial-value:#24242b;}.stitch-send{box-sizing:border-box;width:var(--stitch-control-size);height:var(--stitch-control-size);aspect-ratio:1;padding:0;border:0;border-radius:50%;corner-shape:round;background:transparent;box-shadow:none;transition:none}.stitch-send-face{--stitch-send-top:#3d3d46;--stitch-send-bottom:#24242b;--stitch-send-bevel:inset 0 1px 0 #ffffff30,inset 0 -2px 0 #0005;display:grid;place-items:center;position:relative;box-sizing:border-box;width:100%;height:100%;border:1px solid #25252d;border-radius:50%;corner-shape:round;background:linear-gradient(var(--stitch-send-top),var(--stitch-send-bottom));box-shadow:var(--stitch-send-bevel);pointer-events:none;transition:--stitch-send-top .32s ease,--stitch-send-bottom .32s ease,border-color .32s ease,transform .2s cubic-bezier(.2,.8,.2,1),box-shadow .15s ease}.stitch-send svg{width:clamp(20px,calc(var(--stitch-control-size) * .5 + 2px),26px);height:clamp(20px,calc(var(--stitch-control-size) * .5 + 2px),26px)}.stitch-send:not(:disabled){color:#fff}.stitch-send:not(:disabled):hover,.stitch-send:not(:disabled):focus-visible,.stitch-send:not(:disabled):active{background:transparent;transform:none}.stitch-send:not(:disabled):hover .stitch-send-face,.stitch-send:not(:disabled):focus-visible .stitch-send-face{--stitch-send-top:#0047ff;--stitch-send-bottom:#0047ff;border-color:#0047ff;transform:translateY(-2px)}.stitch-send:not(:disabled):active .stitch-send-face{transform:translateY(1px);box-shadow:inset 0 1px 2px #0003,inset 0 -1px #0005}.stitch-send:focus-visible{outline:2px solid #0047ff;outline-offset:3px}.stitch-send:disabled{color:#9b9ba3;opacity:1}.stitch-send:disabled .stitch-send-face{border-color:transparent;background:#e8e8eb;box-shadow:inset 0 1px #ffffffa6,inset 0 -1px #00000014}.stitch-send.is-busy:disabled{color:#fff}.stitch-send.is-busy:disabled .stitch-send-face{border-color:#25252d;background:linear-gradient(var(--stitch-send-top),var(--stitch-send-bottom));opacity:.6;box-shadow:var(--stitch-send-bevel)}.stitch-send.is-busy svg{display:none}.stitch-send.is-busy .stitch-send-face:after{content:"";width:16px;height:16px;border:1.5px solid #ffffff55;border-top-color:#fff;border-radius:50%;corner-shape:round;animation:stitch-busy .7s linear infinite}.md-ui-tooltip,.q-tooltip:not(.coach-homework-original-preview){box-sizing:border-box;width:max-content;min-height:32px;max-width:min(280px,calc(100vw - 16px));max-height:calc(100dvh - 16px);padding:7px 12px;border:0;border-radius:var(--workspace-radius-tooltip, 12px);corner-shape:var(--md-corner-shape, round);background:var(--md-ui-tooltip-surface, #34303d);color:var(--md-ui-tooltip-ink, #fff);font-family:PingFang SC,-apple-system,BlinkMacSystemFont,Microsoft YaHei,sans-serif;font-size:12px;font-weight:400;line-height:18px;letter-spacing:normal;text-align:start;white-space:normal;overflow-wrap:anywhere;box-shadow:0 3px 10px #18152014;pointer-events:none}.md-ui-tooltip{position:fixed;z-index:9000;margin:0}.stitch-popover{--md-ui-menu-radius:16px;--md-ui-menu-inset-ratio:.375;--md-ui-menu-inset:calc(var(--md-ui-menu-radius) * var(--md-ui-menu-inset-ratio));--md-ui-menu-item-radius:max(0px,calc(var(--md-ui-menu-radius) - var(--md-ui-menu-inset)));box-sizing:border-box;position:fixed;z-index:6000;width:286px;max-width:calc(100vw - 16px);padding:var(--md-ui-menu-inset);overflow:auto;color:#393939;background:#ffffffed;border:1px solid #e6e6e6;border-radius:var(--md-ui-menu-radius);corner-shape:var(--md-corner-shape);box-shadow:0 5px 12px #25252508,0 18px 48px #2525251a;-webkit-backdrop-filter:blur(32px);backdrop-filter:blur(32px);font-family:PingFang SC,-apple-system,BlinkMacSystemFont,Microsoft YaHei,sans-serif;animation:stitch-menu-in .15s cubic-bezier(.2,.8,.2,1);transform-origin:top left}.stitch-popover[data-side=top]{transform-origin:bottom left}.stitch-menu-heading{padding:9px 10px 8px;font-size:11px;line-height:16px;color:#909090}.stitch-popover button:not(.md-ui-button--primary){display:flex;align-items:center;gap:10px;box-sizing:border-box;width:100%;border:0;border-radius:var(--md-ui-menu-item-radius);corner-shape:var(--md-corner-shape);padding:10px;text-align:left;color:inherit;background:transparent;cursor:pointer;font:inherit;transition:background .1s}.stitch-popover button:not(.md-ui-button--primary):hover,.stitch-popover button:not(.md-ui-button--primary):focus-visible{background:#f5f5f5;outline-color:#737373;outline-offset:-2px}.stitch-popover button:not(.md-ui-button--primary):active{background:#ebebeb}.stitch-popover button>span:not(.stitch-menu-check){display:flex;flex:1;flex-direction:column;gap:3px}.stitch-popover strong{font-weight:500;font-size:13px;line-height:20px}.stitch-popover small{font-size:11px;line-height:17px;color:#858585}.stitch-menu-check{width:16px}.stitch-popover small:empty{display:none}.stitch-popover button:not(.md-ui-button--primary):disabled{opacity:.4;cursor:default;background:transparent}.md-ui-menu--compact.stitch-popover{--md-ui-menu-radius:12px;--md-ui-menu-inset-ratio:.333333;width:144px}.md-ui-menu--compact .md-ui-menu-item:not(.md-ui-button--primary){height:32px;min-height:32px;padding:0 6px;gap:8px;font-size:12px}.md-ui-menu--compact .md-ui-menu-label strong{font-size:12px;line-height:18px}.md-ui-menu--compact .md-ui-menu-item>:is(svg,.md-ui-menu-image){width:16px;height:16px}@media(max-width:600px){.stitch-modes button{padding:0 10px;min-width:60px}.stitch-task-picker{width:auto;padding:0 9px}.stitch-task-picker>span{display:none}}@media(prefers-reduced-motion:reduce){:is(.entry-button,.md-ui-button--primary):not(.md-ui-button--brand){transition:none}.stitch-popover{animation:none}.stitch-tool,.stitch-mode-indicator,.stitch-send-face{transition:none}.stitch-send:not(:disabled):hover .stitch-send-face,.stitch-send:not(:disabled):focus-visible .stitch-send-face,.stitch-send:not(:disabled):active .stitch-send-face{transform:none}.stitch-send.is-busy .stitch-send-face:after{animation:none}}.md-ui-menu-shortcut{font-family:inherit;font-size:11px;line-height:17px;color:#858585;white-space:nowrap}