/* OpenEduWisdom · 单屏教师 AI 工作台 */
:root{--paper:#f6f7fb;--paper-2:#eeebfb;--paper-3:#e3defa;--ink:#1f2430;--ink-2:#3d4351;--muted:#7b8494;--chart:#6d5ae0;--mint:#8f7ff0;--yellow:#f3c13a;--line:rgba(31,36,48,.12);--line-soft:rgba(31,36,48,.07);--white:#ffffff;--rail:236px;--context:276px;--topbar:66px;--footer:38px;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
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a{display:flex;align-items:center;justify-content:space-between;font-size:10px;font-weight:700}.desktop-card a svg{width:14px;height:14px}.workspace-footer{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 22px;border-top:1px solid var(--line);background:var(--paper-2);color:var(--muted);font-size:8px}.workspace-footer>span:first-child{display:flex;align-items:center;gap:6px}.workspace-footer>span:first-child i{background:#76917b}.workspace-footer nav{display:flex;gap:16px}.workspace-footer a:hover{color:var(--ink)}.toast{position:fixed;z-index:90;left:50%;bottom:52px;max-width:min(90vw,480px);padding:10px 16px;border-radius:6px;background:var(--ink);color:var(--paper);font-size:12px;opacity:0;pointer-events:none;transform:translate(-50%,8px);transition:opacity .18s,transform .18s}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(min-width:1600px){:root{--rail:252px;--context:300px}.agent-zone{max-width:1020px}.agent-intro h1{font-size:48px}.quick-item{min-height:82px}.quick-item strong{font-size:12px}.quick-item small{font-size:9px}.feature-topic h2{font-size:24px}}
@media(max-width:1180px){:root{--rail:216px;--context:248px}.brand strong{font-size:15px}.brand small{font-size:8px}.agent-zone{padding-left:26px;padding-right:26px}.quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.quick-item{min-height:60px}.context-panel{padding:18px 16px}.feature-topic{padding:15px}.feature-topic h2{font-size:18px}.topic-icon{margin-top:16px}.service-state{display:none}}
@media(max-height:790px) and (min-width:901px){:root{--topbar:58px;--footer:32px}.rail-head{height:70px;padding-top:12px}.new-task{margin-bottom:7px}.rail-nav a{min-height:30px;padding-top:5px;padding-bottom:5px}.nav-label{margin-top:9px}.rail-foot{padding-top:8px;padding-bottom:8px}.rail-foot p{display:none}.agent-zone{padding-top:15px;padding-bottom:14px}.agent-intro h1{font-size:32px}.agent-intro>p:last-child{margin-top:8px}.eyebrow{margin-bottom:8px}.composer{margin-top:18px}.composer textarea{min-height:78px;padding-top:14px}.prompt-examples{margin-top:11px}.quick-section{margin-top:17px}.quick-item{min-height:55px;padding-top:9px;padding-bottom:9px}.context-panel{padding-top:15px}.topic-icon{margin-top:13px}.feature-topic h2{margin-top:8px;font-size:18px}.feature-topic p{line-height:1.6}.feature-topic>a:not(.topic-sample){margin-top:12px}.resource-links{margin-top:15px}.resource-links>a{padding:7px 2px}.desktop-card{margin-top:13px;padding-top:11px}}
@media(max-width:900px){.app-shell{height:auto;min-height:100dvh;display:block;overflow:visible}.side-rail{position:fixed;inset:0 auto 0 0;width:min(82vw,280px);transform:translateX(-102%);transition:transform .22s ease-out;box-shadow:20px 0 60px rgba(14,42,34,.22)}body.nav-open{overflow:hidden}.nav-open .side-rail{transform:none}.rail-close{display:grid;width:32px;height:32px;margin-left:auto;color:var(--paper)}.rail-close svg{width:18px;height:18px}.rail-scrim{position:fixed;z-index:20;inset:0;border:0;background:rgba(14,42,34,.45)}.nav-open .rail-scrim{display:block}.main-stage{min-height:100dvh;grid-template-rows:60px auto 42px}.menu-button{display:grid}.workspace{display:block;overflow:visible}.agent-zone{max-width:760px;padding:38px 28px 30px}.quick-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.context-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;overflow:visible;padding:26px 28px;border-top:1px solid var(--line);border-left:0}.resource-links{margin-top:0}.desktop-card{grid-column:2;margin-top:-90px;align-self:end}.workspace-footer{padding:0 18px}.workspace-footer>span:first-child{display:none}}
@media(max-width:640px){.topbar{padding:0 14px}.crumb,.crumb-sep{display:none}.topbar-actions{gap:8px}.topbar-actions #network-mount{display:none}.entry-button{padding:6px 9px}.agent-zone{padding:28px 16px 26px}.agent-intro h1{font-size:31px}.agent-intro>p:last-child{font-size:12px;line-height:1.7}.composer{margin-top:22px}.composer textarea{min-height:112px;padding:16px 16px 6px;font-size:14px}.composer-toolbar{padding-left:10px}.input-count{display:none}.composer-note{font-size:8px}.composer-note span:first-child{display:none}.composer-note{justify-content:flex-end}.prompt-examples{display:grid;grid-template-columns:1fr;margin-top:14px}.prompt-examples button{padding:8px 10px}.quick-section{margin-top:24px}.quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.quick-item{min-height:76px;padding:12px 10px;gap:8px}.quick-item strong{font-size:11px}.quick-item small{font-size:8px}.context-panel{display:block;padding:24px 16px}.feature-topic{max-width:none}.resource-links{margin-top:24px}.desktop-card{margin-top:22px}.workspace-footer{height:auto;min-height:46px;justify-content:center}.workspace-footer nav{gap:13px}.workspace-footer>span:last-child{display:none}}
@media(min-width:901px){.rail-close{display:none}}
/* 学术紫组件覆盖：置于响应式规则之后，确保主题色在所有视口一致。 */
.brand small{color:#b7bacb}.new-task{border-color:rgba(143,127,240,.55);color:#fff}.new-task:hover{background:#5749c9}.new-task kbd{border-color:rgba(255,255,255,.3)}.rail-nav{scrollbar-color:#575167 transparent}.nav-label{color:#9995ad}.rail-nav a{color:#dddde8}.rail-nav a svg{color:#aaa6bd}.rail-nav a.active{background:rgba(143,127,240,.16);color:#b8adf7}.rail-nav a.active svg,.rail-foot>a svg{color:#b8adf7}.rail-nav a i{color:#9995ad}.rail-foot>a{color:#f1f0f7}.rail-foot small,.rail-foot p{color:#9995ad}.main-stage{background-image:linear-gradient(rgba(31,36,48,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(31,36,48,.025) 1px,transparent 1px)}.topbar{background:rgba(246,247,251,.94)}.crumb-sep{color:#a4a9b5}.service-state.online i,.workspace-footer>span:first-child i{background:#16a34a}.composer{border-color:rgba(31,36,48,.3);box-shadow:0 1px 0 var(--ink),0 16px 42px -32px rgba(31,36,48,.55)}.composer:focus-within{border-color:var(--chart);box-shadow:0 0 0 3px rgba(109,90,224,.22),0 1px 0 var(--chart)}:focus-visible{outline-color:var(--chart)}.composer textarea::placeholder,.input-count{color:#8b929f}.send-button{background:var(--chart);color:#fff}.send-button:hover{background:#5749c9}.prompt-examples button{background:rgba(255,255,255,.6)}.quick-item{background:rgba(255,255,255,.45)}.quick-item.is-new{background:rgba(109,90,224,.08)}.quick-item>i{color:#8b929f}.quick-item>b,.topic-top b,.feature-topic>a:not(.topic-sample){color:#fff}.context-panel{background:rgba(238,235,251,.62)}.feature-topic{box-shadow:0 1px 0 rgba(31,36,48,.25)}.topic-top{color:#aaa6bd}.feature-topic p,.topic-sample{color:#c5c3d1}.resource-links>a>span{color:#8b929f}.resource-links>a:hover strong{color:#5749c9}.rail-scrim{background:rgba(31,36,48,.45)}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}