/* 教材课堂交互重构 V1：作品优先、五阶段提示、一主动作 + 三组工具。 */
.ce-lesson-head{padding:0 0 12px;margin-bottom:12px;border-bottom:1px solid var(--line)}
.ce-lesson-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:10px}
.ce-lesson-toolbar .lesson-breadcrumb{margin:0!important}
.ce-view-switch{display:flex;gap:3px;padding:3px;border:1px solid var(--line);border-radius:999px;background:var(--surface)}
.ce-view-switch button{padding:5px 10px;border:0;border-radius:999px;background:transparent;font-size:11px}
.ce-view-switch button.active{background:var(--paper);color:var(--brand);box-shadow:0 1px 4px #1c2e2516}
.ce-lesson-summary{display:grid;grid-template-columns:minmax(260px,.9fr) minmax(420px,1.3fr);gap:22px;align-items:end}
.ce-lesson-summary h1{font-size:25px;line-height:1.35;margin:2px 0 3px}
.ce-lesson-summary .eyebrow{margin:0;font-size:10px}
.ce-current-work{font-size:11px!important;color:var(--muted);margin:0}
.ce-core-question{border-left:3px solid var(--brand);padding:10px 14px;background:var(--brand-soft);border-radius:0 9px 9px 0;display:grid;gap:4px}
.ce-core-question small{font-size:10px;color:var(--muted)}
.ce-core-question strong{font-size:15px;line-height:1.55;font-weight:600}
.ce-core-question span{font-size:10px;color:var(--muted)}
.ce-stage-track{display:grid;grid-template-columns:repeat(5,minmax(0,1fr)) auto;align-items:center;gap:7px;margin:12px 0 0}
.ce-stage-track button{position:relative;border:0;border-bottom:2px solid var(--line);border-radius:0;background:transparent;padding:8px 4px 7px;text-align:left;font-size:11px;color:var(--muted);white-space:nowrap}
.ce-stage-track button span{display:inline-grid;place-items:center;width:18px;height:18px;border:1px solid currentColor;border-radius:50%;font:10px Georgia;margin-right:5px}
.ce-stage-track button.active{color:var(--brand);border-color:var(--brand);font-weight:600;background:linear-gradient(0deg,var(--brand-soft),transparent 76%)}
.ce-stage-track>small{font-size:9px;color:var(--muted);white-space:nowrap}
.ce-stage-track .ce-summary-stage{border-bottom-style:dashed}
.ce-stage-track .ce-summary-stage>small{display:block;margin:2px 0 0 23px;font-size:8px;color:var(--muted)}
.ce-stage-mobile-toggle{display:none}
.ce-summary-actions{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:8px;padding:10px 12px;border:1px dashed var(--line);border-radius:9px;background:var(--surface)}
.ce-summary-actions[hidden]{display:none}
.ce-summary-actions>div:first-child{display:grid;gap:2px}
.ce-summary-actions strong{font-size:11px}
.ce-summary-actions small{font-size:9px;color:var(--muted)}
.ce-summary-links{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.ce-summary-links button{padding:6px 9px;font-size:10px}
.ce-classroom-settings{margin-top:9px;border:1px solid var(--line);border-radius:9px;background:var(--paper)}
.ce-classroom-settings>summary{display:flex;align-items:center;gap:7px;padding:9px 12px;font-size:11px;font-weight:500;cursor:pointer}
.ce-classroom-settings>summary b{font-weight:600;color:var(--muted)}
.ce-status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#9aa39d;box-shadow:0 0 0 3px #9aa39d1f;flex:none}
[data-classroom-state="active"] .ce-status-dot{background:#258652;box-shadow:0 0 0 3px #25865220}
[data-classroom-state="error"] .ce-status-dot{background:#b75d4b;box-shadow:0 0 0 3px #b75d4b20}
[data-classroom-state="delegated"] .ce-status-dot{background:#7f8983;box-shadow:0 0 0 3px #7f89831f}
.ce-classroom-panel{padding:0 12px 12px!important}
.ce-lifecycle{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 0;border-top:1px solid var(--line)}
.ce-lifecycle span{padding:4px 8px;border-radius:999px;background:var(--surface);font-size:10px;color:var(--muted)}
.ce-lifecycle span.current{background:var(--brand);color:#fff}
.ce-lifecycle i{font-style:normal;color:var(--muted);font-size:10px}
.ce-lifecycle small{flex:1;min-width:280px;font-size:10px;color:var(--muted)}
.ce-classroom-boundary{font-size:11px;margin:3px 0 10px;color:var(--muted)}
.ce-demo-controls{border-top:1px dashed var(--line);padding-top:8px}
.ce-demo-controls>summary{font-size:10px;color:var(--muted);cursor:pointer}
.ce-demo-controls .actions{margin:8px 0}
.ce-demo-controls button{font-size:10px;padding:6px 9px}
.ce-demo-controls small{font-size:9px;color:var(--muted)}
.ce-classroom-settings .cv-teacher{margin:10px 0 0!important;padding:15px!important;border-radius:8px;background:var(--brand-soft)}
.ce-classroom-settings .cv-teacher h3{font-size:14px;margin-bottom:5px}
.ce-classroom-settings .cv-teacher p,.ce-classroom-settings .cv-teacher label{font-size:11px}
.ce-classroom-settings .cv-teacher select,.ce-classroom-settings .cv-teacher input{max-width:420px;padding:8px;border:1px solid var(--line);background:var(--paper)}
.ce-classroom-settings .cv-teacher button{font-size:10px;padding:7px 10px}
body[data-view="lesson"] main{padding-top:16px}
body[data-view="lesson"] .zones{margin-bottom:12px}
body[data-view="lesson"] .zones button{padding-top:8px;padding-bottom:8px}
body[data-view="lesson"][data-zone="art"] .art-selection{margin-bottom:10px}
body[data-view="lesson"][data-zone="art"] .art-layout{grid-template-columns:minmax(0,1fr) minmax(320px,360px);gap:20px;align-items:start}
body[data-view="lesson"][data-zone="art"] .viewer{height:clamp(350px,46vh,500px)}
body[data-view="lesson"][data-zone="art"] .art-companion-column{display:flex;flex-direction:column;gap:12px;min-width:0}
.ce-current-class{margin:0;padding:16px;border-radius:12px;box-shadow:0 8px 28px #1b2c2310}
.ce-group-kicker{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:9px}
.ce-group-kicker span{font-size:10px;letter-spacing:1.4px;color:var(--muted)}
.ce-group-kicker b{font-size:11px;color:var(--brand);padding:4px 8px;border-radius:999px;background:var(--brand-soft)}
.ce-stage-instruction{font-size:12px;line-height:1.6;font-weight:600;margin:0 0 9px}
.ce-live-line{display:grid;grid-template-columns:auto 1fr auto;gap:7px;align-items:center;padding:8px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:10px;margin:0 0 10px}
.ce-live-line strong{font-size:10px;font-weight:500;color:var(--muted)}
.ce-live-line button{padding:4px 7px;border:0;background:transparent;color:var(--brand);font-size:10px}
.ce-primary-action{width:100%;margin:0 0 10px}
.ce-teaching-tips{margin:0 0 9px;border-radius:8px;background:var(--brand-soft)}
.ce-teaching-tips>summary{padding:8px 10px;font-size:10px;color:var(--muted);cursor:pointer}
.ce-teaching-tips-body{padding:0 10px 10px}
.ce-teaching-tips .v51-next-step{border:0;border-radius:0;margin:0;padding:8px 0 0;background:transparent}
.ce-teaching-tips .v51-next-step h2{display:none}
.ce-teaching-tips .v51-next-step .v51-next-primary{font-size:11px;margin-bottom:5px}
.ce-teaching-tips .v51-next-step ul{font-size:10px;gap:2px}
.ce-teaching-tips .v51-next-step small{font-size:9px}
.ce-current-class>.v51-xiaoyi-group{margin:10px 0 0}
.ce-current-class .companion-panel{border:0!important;padding:12px 0 0!important;margin:0!important;border-top:1px dashed var(--line)!important;background:transparent!important;box-shadow:none!important}
.ce-current-class .companion-panel .agent-header .xiaoyi{width:72px;min-width:72px}
.ce-current-class .companion-panel .agent-conversation{max-height:180px}
.ce-side-group{margin:0;border:1px solid var(--line);border-radius:12px;background:var(--paper);overflow:hidden}
.ce-side-group>summary{list-style:none;display:flex;align-items:center;gap:10px;padding:13px 15px;cursor:pointer}
.ce-side-group>summary::-webkit-details-marker{display:none}
.ce-side-group>summary>span{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--surface);color:var(--brand);font:11px Georgia}
.ce-side-group>summary>div{display:grid;gap:2px;min-width:0}
.ce-side-group>summary strong{font-size:14px}
.ce-side-group>summary small{font-size:9px;color:var(--muted);line-height:1.5}
.ce-side-group>summary:after{content:"＋";margin-left:auto;color:var(--muted)}
.ce-side-group[open]>summary:after{content:"－"}
.ce-group-body{padding:0 15px 15px}
.ce-group-body>.v51-tool-group{border:0;border-top:1px solid var(--line);border-radius:0;padding:14px 0 0;margin:0 0 10px;background:transparent}
.ce-group-body>.classroom-question-details{margin:0 0 10px;border-top:1px solid var(--line);padding-top:10px}
.ce-group-body>.classroom-question-details>summary{font-size:12px;font-weight:600}
.ce-read-entry{display:flex;align-items:center;gap:10px;justify-content:space-between;border-top:1px solid var(--line);padding-top:11px}
.ce-read-entry>span{display:grid;gap:3px}
.ce-read-entry b{font-size:12px}
.ce-read-entry small{font-size:9px;color:var(--muted);line-height:1.5}
.ce-read-entry button{font-size:10px;padding:6px 8px;white-space:nowrap}
.ce-gate-note,.ce-private-note{font-size:10px;line-height:1.7;color:var(--muted);padding:9px 10px;background:var(--surface);border-radius:7px}
.ce-prep-links{display:grid;grid-template-columns:1fr 1fr;gap:7px;border-top:1px solid var(--line);padding-top:12px}
.ce-prep-links button{font-size:10px;padding:8px;text-align:left}
.ce-preparation-group .art-details{display:block;margin:10px 0 0;border-top:1px solid var(--line);padding-top:10px}
.ce-preparation-group .art-details>summary{font-size:11px;font-weight:600}
.ce-preparation-group .art-details h2{font-size:18px}
.ce-preparation-group .art-details h3{font-size:13px}
.ce-preparation-group .art-details p,.ce-preparation-group .art-details dd,.ce-preparation-group .art-details li{font-size:10px}
body[data-teacher-view="prep"] .ce-current-class{box-shadow:none}
body[data-teacher-view="prep"] .ce-preparation-group{border-color:color-mix(in srgb,var(--brand) 45%,var(--line))}

#multischool-root .ms-banner.ms-error[data-ce-compact="true"]{max-width:760px;margin:8px auto;padding:0;border-radius:8px}
#multischool-root .ce-entry-error-details{width:100%}
#multischool-root .ce-entry-error-details>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;cursor:pointer;list-style:none}
#multischool-root .ce-entry-error-details>summary::-webkit-details-marker{display:none}
#multischool-root .ce-entry-error-details>summary strong{font-size:12px}
#multischool-root .ce-entry-error-details>summary span{font-size:10px;color:var(--muted);white-space:nowrap}
#multischool-root .ce-entry-error-details>p{margin:0;padding:0 14px 12px;font-size:11px;line-height:1.65}

@media(min-width:1700px){body[data-view="lesson"][data-zone="art"] .art-layout{grid-template-columns:minmax(0,1fr) 380px}.ce-lesson-summary{grid-template-columns:1fr 1.35fr}}
@media(max-width:1180px){.ce-lesson-summary{grid-template-columns:minmax(210px,.85fr) minmax(0,1.15fr);gap:14px}.ce-core-question{padding:9px 12px}.ce-stage-track{grid-template-columns:repeat(5,minmax(105px,1fr));overflow-x:auto;padding-bottom:4px}.ce-stage-track>small{display:none}body[data-view="lesson"][data-zone="art"] .art-layout{grid-template-columns:1fr}body[data-view="lesson"][data-zone="art"] .viewer{height:300px}body[data-view="lesson"][data-zone="art"] .art-companion-column{display:grid;grid-template-columns:1fr 1fr}.ce-current-class{grid-column:1/-1}.ce-current-class>.v51-xiaoyi-group{max-width:660px}.ce-side-group{align-self:start}}
@media(max-width:700px){body[data-view="lesson"] main{padding-top:10px}.ce-lesson-head{padding-bottom:8px;margin-bottom:8px}.ce-lesson-toolbar{align-items:flex-start;margin-bottom:7px}.ce-view-switch{flex:none}.ce-view-switch button{font-size:9px;padding:5px 7px}.ce-lesson-summary{grid-template-columns:1fr;gap:7px}.ce-lesson-summary h1{font-size:19px;line-height:1.25}.ce-core-question{padding:7px 10px;gap:2px}.ce-core-question strong{font-size:12px;line-height:1.45}.ce-core-question span{font-size:9px}.ce-stage-mobile-toggle{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:8px;width:100%;margin-top:8px;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--paper);text-align:left}.ce-stage-mobile-toggle span,.ce-stage-mobile-toggle small{font-size:9px;color:var(--muted)}.ce-stage-mobile-toggle strong{font-size:11px}.ce-stage-track{display:none;margin:6px 0 0;grid-template-columns:1fr;overflow:visible;padding:4px 8px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}.ce-stage-track.is-mobile-open{display:grid}.ce-stage-track button{font-size:10px;padding:7px 4px}.ce-stage-track .ce-summary-stage>small{display:inline;margin-left:6px}.ce-summary-actions{align-items:flex-start;flex-direction:column}.ce-summary-links{justify-content:flex-start}.ce-classroom-settings{margin-top:7px}.ce-classroom-settings>summary{font-size:10px;padding:8px 10px}.ce-classroom-panel{padding:0 10px 10px!important}.ce-lifecycle small{min-width:100%}body[data-view="lesson"][data-zone="art"] #zone-body{display:flex;flex-direction:column}body[data-view="lesson"][data-zone="art"] .art-layout{display:contents}body[data-view="lesson"][data-zone="art"] .art-layout>div:first-child{order:1;min-width:0}body[data-view="lesson"][data-zone="art"] .art-selection{order:2;margin-top:10px;margin-bottom:0}body[data-view="lesson"][data-zone="art"] .art-companion-column{order:3;display:flex;margin-top:10px}body[data-view="lesson"][data-zone="art"] .viewer{height:160px}body[data-view="lesson"][data-zone="art"] .viewer-toolbar{flex-wrap:nowrap;gap:6px;padding:7px 8px}body[data-view="lesson"][data-zone="art"] .viewer-toolbar>span{flex:0 1 116px;min-width:0}body[data-view="lesson"][data-zone="art"] .viewer-toolbar .badge{font-size:8px;line-height:1.3;white-space:normal}body[data-view="lesson"][data-zone="art"] .viewer-toolbar>div{display:flex;align-items:center;gap:3px;flex:1;min-width:0}body[data-view="lesson"][data-zone="art"] .viewer-toolbar button{padding:5px 6px;font-size:9px;white-space:nowrap}body[data-view="lesson"][data-zone="art"] .viewer-toolbar input{width:54px;min-width:36px}body[data-view="lesson"][data-zone="art"] .viewer-toolbar output{font-size:9px}.ce-current-class{padding:14px}.ce-stage-instruction{font-size:11px}.ce-prep-links{grid-template-columns:1fr}.ce-read-entry{align-items:flex-start}#multischool-root .ms-banner.ms-error[data-ce-compact="true"]{margin:6px 16px}#multischool-root .ce-entry-error-details>summary{padding:9px 12px}}