:root{--bg:#f5f7fb;--primary:#5056d9;--primary2:#f0f0ff;--text:#202846;--muted:#7b8398;--line:#e3e7ef;--shadow:none;--soft:none}body{font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:14px;line-height:1.5}button,input,select,textarea{font-family:inherit;font-size:13px}button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:3px solid #9a9fee;outline-offset:3px}button:disabled{cursor:not-allowed;opacity:.45}svg{width:20px;height:20px;display:block;flex-shrink:0}i[data-icon]{display:inline-flex;align-items:center;justify-content:center;font-style:normal}.app{display:block}.navigation{width:208px;position:fixed;inset:0 auto 0 0;background:white;border-right:1px solid var(--line);padding:31px 18px 22px;display:flex;flex-direction:column;z-index:25}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#202846;font-weight:750;font-size:16px;white-space:nowrap;margin:2px 0 45px}.brand svg{width:28px;height:28px;color:var(--primary)}.navigation nav{display:grid;gap:10px}.nav-item{display:flex;gap:13px;align-items:center;border:0;background:none;padding:13px 14px;text-align:left;color:#535d74;border-radius:8px;font-size:14px}.nav-item.active{color:white;background:var(--primary);box-shadow:0 4px 10px #5056d91a}.nav-item:hover:not(.active){background:#f6f7fb}.nav-bottom{margin-top:auto;border-top:1px solid var(--line);padding:20px 4px 0;display:grid;gap:12px;font-size:12px;color:var(--muted)}.workspace{margin-left:208px;min-width:0}.header{height:80px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 30px;gap:12px}.header-title{font-size:16px;font-weight:650}.header-actions{display:flex;gap:13px;align-items:center}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:7px;height:37px;white-space:nowrap;font-weight:500;padding:0 13px}.btn:hover{transform:none;background:#f4f5fc}.btn.primary:hover{background:#4248c1}.btn svg{width:17px;height:17px}.projection{color:var(--primary);border-color:#b5b8ed}.content{padding:29px 30px 35px;max-width:1900px;margin:auto}.class-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;gap:16px}.class-picker{font-size:23px;font-weight:650;color:var(--text);padding:3px 28px 3px 0;border:0;background:transparent;max-width:100%;text-overflow:ellipsis;cursor:pointer}.class-heading p{margin:6px 0 0;color:var(--muted);font-size:12px}.demo-badge{border-left:1px solid #d9dce6;margin-left:8px;padding-left:9px}.session-controls{display:flex;align-items:center;gap:20px}.session-live{color:#278f66;font-size:12px}.session-live::before{font-size:10px}.end-class{border-color:#edb1b6;color:#ce555e;background:#fff}.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border:1px solid var(--line);border-radius:11px;padding:20px 8px;margin-bottom:23px}.stats-strip>div{display:flex;align-items:center;justify-content:center;gap:12px;border-right:1px solid var(--line);height:24px}.stats-strip>div:last-child{border:0}.stats-strip i{color:#7479d9}.stats-strip>div:last-child i{color:#e08b53}.stats-strip span{color:var(--muted);font-size:12px}.stats-strip b{font-size:22px;line-height:1;font-weight:650}.layout{display:grid;grid-template-columns:minmax(0,1fr) 258px;gap:20px;padding:0;align-items:start}.seat-panel{background:#fff;border:1px solid var(--line);border-radius:11px;min-width:0;overflow:hidden}.map-toolbar{padding:19px 18px;display:flex;align-items:center;gap:9px;flex-wrap:wrap}h2{font-size:16px;font-weight:650;margin:0}.map-toolbar h2{margin-right:auto}.search{border:1px solid var(--line);border-radius:7px;display:flex;align-items:center;gap:7px;padding:0 9px;background:#fcfcfe;flex:1;min-width:140px;max-width:205px;height:35px}.search svg{width:15px;height:15px;color:#969eb0}.search input{width:100%;min-width:0;border:0;outline:0;background:none;font-size:11px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);border-radius:7px;width:35px;height:35px;color:var(--text)}.icon-btn svg{width:17px}.map-options{border-bottom:1px solid var(--line);padding:0 18px 14px;display:flex;gap:8px;flex-wrap:wrap}.classroom-wrap{border:0;border-radius:0;box-shadow:none;overflow:visible}.classroom{min-width:0;padding:9px 18px 6px}.zone-label{height:28px;border-radius:4px;background:#f0f1f5;color:#7b8193;font-weight:500;font-size:11px;padding:5px;margin-left:38px}.corridor{margin-bottom:25px}.window{margin-top:25px}.room{grid-template-columns:23px minmax(0,1fr);gap:15px;min-height:340px}.podium{height:100%;background:#eff0f5;border:0;border-radius:5px;color:#7b8193;font-size:12px;font-weight:500;letter-spacing:.6em}.seat-area{padding:0;gap:25px;justify-content:space-between;min-width:0}.row{display:grid;grid-template-columns:2fr 4fr 4fr 4fr;gap:13px;min-width:0}.cluster{gap:6px;min-width:0}.cluster.c2{grid-template-columns:repeat(2,minmax(0,1fr))}.cluster.c4{grid-template-columns:repeat(4,minmax(0,1fr))}.seat{height:72px;min-width:0;width:100%;padding:20px 2px 12px;background:#f0f0ff;border:1px solid #dcdcff;border-radius:5px;color:#394063;transition:background .15s,box-shadow .15s;cursor:pointer}.seat.gender-male{background:linear-gradient(180deg,#eaf4ff,#dcecff);border-color:#8db9e8}.seat.gender-female{background:linear-gradient(180deg,#fff0f6,#ffe2ee);border-color:#e5a5bf}.seat.gender-male:hover{background:#dcecff}.seat.gender-female:hover{background:#ffe2ee}.seat:hover{background:#e6e7ff;box-shadow:0 0 0 2px #5056d930}.pcno{position:absolute;top:4px;left:5px;font-size:9px;font-weight:500;color:#7479a7}.seat-name{font-size:11px;font-weight:550;line-height:1.4;max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.seat .empty{font-size:10px;color:#9ba1b1}.seat:has(.empty){background:#fafbfe;border-style:dashed;border-color:#dfe2eb}.seat.disabled,.seat.device-issue{background:#fff8eb;border:1px solid #efd7a0;color:#af7c20;outline:none}.seat.disabled .seat-name{font-size:9px;white-space:normal}.seat.locked{box-shadow:none;border-color:#bcbfea}.seat .icons{right:2px;top:2px}.seat .mini{font-size:9px;padding:0 1px}.seat .disableBtn{display:none}.seat.has-mark{box-shadow:none}.seat.mark-praise{border-color:#9bd6b5;background:#f0faf4}.seat.mark-late,.seat.mark-misconduct,.seat.mark-leave,.seat.mark-other{background:#fff6ed;border-color:#edd0ad}.mark-badge{font-size:8px;border-radius:3px;left:3px;bottom:3px;background:transparent!important;color:var(--mark-color);padding:0}.device-badge{font-size:7px;border:0;padding:0;bottom:2px;right:2px}.seat.filtered{opacity:.12;pointer-events:none}.map-footer{padding:20px 18px 19px;display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}.legend{display:flex;gap:15px;font-size:10px;color:#858a9b}.legend span{display:flex;align-items:center;gap:5px}.legend em{width:10px;height:10px;border-radius:3px;background:#d6d6ff}.legend .praise{background:#a6dcb9}.legend .attention{background:#f3c6a1}.legend .device{background:#efd28b}.seat-help{font-size:9px;margin:0;color:#9197a5}.side{display:flex;flex-direction:column;gap:17px;position:static;background:none;border:0;border-radius:0;padding:0;box-shadow:none;min-width:0}.activity-panel,.tools-panel,.unseated-panel{background:white;border:1px solid var(--line);border-radius:11px;padding:19px 16px}.panel-title{margin:0 0 18px;font-size:14px}.panel-title h2{font-size:14px}.text-btn{border:0;background:none;color:var(--primary);font-size:11px;cursor:pointer;padding:3px}.activity-list{display:flex;flex-direction:column;max-height:330px;overflow:auto}.activity-event{display:grid;grid-template-columns:28px 1fr;gap:9px;position:relative;padding:0 0 21px}.activity-event:not(:last-child):before{content:"";position:absolute;top:27px;bottom:2px;left:13px;width:1px;background:#edf0f5}.event-symbol{border-radius:50%;width:28px;height:28px;background:#f1f0ff;color:#666bcb;display:grid;place-items:center}.event-symbol svg{width:14px;height:14px}.activity-event.praise .event-symbol{background:#eaf7ee;color:#47976b}.activity-event.late .event-symbol,.activity-event.device .event-symbol{background:#fff5e6;color:#cc963b}.activity-event.misconduct .event-symbol{background:#ffedf0;color:#cf6670}.activity-event strong{font-size:11px;font-weight:600}.activity-event p{font-size:11px;color:#858b9d;margin:6px 0 0;overflow-wrap:anywhere}.activity-event time{font-size:9px;color:#959bab}.event-top{display:flex;justify-content:space-between;gap:5px;align-items:center}.activity-event .delete-event{border:0;background:none;font-size:9px;color:#9399aa;padding:5px 0 0;cursor:pointer}.tools-panel h2{font-size:14px;margin-bottom:16px}.tool{display:flex;align-items:center;gap:10px;width:100%;background:#fafaff;border:1px solid #e7e8f5;border-radius:7px;margin-top:10px;min-height:44px;padding:10px 12px;color:#555d7b;font-size:12px}.tool i:first-child{color:var(--primary)}.tool i:last-child{margin-left:auto;color:#a0a5b5}.tool svg{width:17px;height:17px}.unseated{max-height:150px}.unseated-panel .hint{font-size:11px}.page{display:none}.page.active{display:block}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:18px 0 20px}.section-heading h2{font-size:22px}.section-heading p{color:var(--muted);font-size:13px;margin:6px 0}.action-row{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.data-surface,.backup-surface{background:white;border:1px solid var(--line);border-radius:12px;padding:22px}.data-table{width:100%;border-collapse:collapse;font-size:13px}.data-table th{text-align:left;color:var(--muted);font-weight:500;background:#fafbfe}.data-table th,.data-table td{padding:13px 12px;border-bottom:1px solid #eef0f5}.data-table tr:last-child td{border-bottom:0}.data-table .student-avatar{display:inline-grid;place-items:center;background:#eeeefe;color:#676bc6;width:28px;height:28px;border-radius:8px;margin-right:10px;font-size:12px}.backup-surface{max-width:740px;padding:40px}.backup-surface>i svg{width:40px;height:40px;color:var(--primary)}.backup-surface p{color:var(--muted);line-height:1.8}.list{max-height:none;gap:12px}.scheme{padding:20px;background:#fff;border-radius:10px}.scheme strong{font-size:15px}.scheme small{font-size:12px;margin:6px 0 12px}.tinybtn{font-size:12px;padding:6px 10px}.scheme-actions{gap:9px}.dialog{border-radius:14px;padding:27px;box-shadow:0 20px 100px #11183335;max-height:90dvh}.dialog h2{font-size:21px}.dialog p{font-size:13px}.modal{background:#20264166;backdrop-filter:blur(3px)}.ctrl,.textarea{border-radius:7px}.auth-dialog{max-width:430px}.auth-dialog form label{display:grid;gap:7px;font-size:12px;margin:17px 0}.auth-dialog input{width:100%;height:42px}.auth-dialog #authSubmit{width:100%;height:42px}.auth-dialog #authError{color:#bd4b58;font-size:12px;min-height:18px}.modal-footer{margin-top:22px;flex-wrap:wrap}.mark-action{font-size:13px;font-weight:550}.mark-action:disabled{opacity:.4;cursor:not-allowed}.timer-dialog{text-align:center;max-width:480px}.timer-display{font-size:72px;color:var(--primary);font-weight:650;font-variant-numeric:tabular-nums;letter-spacing:-3px;margin:25px 0}.timer-setting{display:flex;align-items:center;justify-content:center;gap:10px}.timer-setting input{width:85px}.timer-dialog .action-row{justify-content:center}.pick-result{font-size:48px;font-weight:650;text-align:center;padding:38px 10px;color:var(--primary)}.device-row{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid var(--line);gap:12px}.device-row:last-child{border:0}.device-row p{margin:5px 0;color:var(--muted);font-size:12px}.device-row .actions{display:flex;gap:8px;flex-wrap:wrap}.status-tag{font-size:11px;background:#f3f3fa;padding:4px 7px;border-radius:5px;color:#737b95}.mobile-seats,.mobile-tabs,.bottom-nav,.mobile-brand,#exitProjection{display:none}.presentation .navigation,.presentation .header,.presentation .class-heading,.presentation .stats-strip,.presentation .map-toolbar,.presentation .map-footer,.presentation .map-options,.presentation .bottom-nav,.presentation .mobile-tabs{display:none!important}.presentation .workspace{margin:0}.presentation .content{padding:12px;max-width:none}.presentation .seat-panel{border:0}.presentation .classroom{min-width:0;min-height:90vh}.presentation .room{min-height:75vh}.presentation .seat{height:calc(18vh - 15px)}.presentation .seat-name{font-size:clamp(12px,1.7vw,24px)}.presentation #exitProjection{display:flex;position:fixed;bottom:12px;right:12px;z-index:45}.presentation .side{display:none}.empty-record{line-height:1.8;padding:25px 8px;font-size:12px}.mobile-tabs button,.bottom-nav button{border:0;background:none}.toast{border-radius:9px;max-width:90vw;white-space:normal;text-align:center;padding:11px 18px}.form-row{flex-wrap:wrap}.form-row>*{min-width:110px}.student-table input{max-width:100%}.timer-mini{font-variant-numeric:tabular-nums}.notice{line-height:1.7}.inline-label{display:flex;gap:10px;align-items:center;margin:16px 0}.inline-label select{min-width:150px}.count-summary{color:var(--muted);font-size:12px;margin-top:0}.data-surface{overflow-x:auto}
@media(min-width:1600px){.layout{grid-template-columns:minmax(0,1fr) 310px}.seat{height:88px}.seat-name{font-size:14px}.pcno{font-size:11px}.room{min-height:405px}.activity-event strong{font-size:13px}.activity-event p{font-size:12px}.map-toolbar h2{margin-right:10px}.search{margin-right:auto}.seat-help{font-size:11px}}
@media(max-width:1250px) and (min-width:761px){.navigation{width:178px;padding:27px 12px}.brand{font-size:14px;gap:7px}.brand svg{width:24px}.workspace{margin-left:178px}.content{padding:24px 20px}.header{padding:0 20px}.layout{grid-template-columns:minmax(0,1fr)}.side{display:grid;grid-template-columns:1.3fr 1fr}.unseated-panel{grid-column:1/-1}.activity-list{max-height:190px}.map-toolbar{flex-wrap:nowrap}.seat{height:78px}.seat-name{font-size:12px}.room{min-height:365px}}
@media(max-width:760px){.navigation{display:none}.workspace{margin:0}.header{height:64px;padding:0 20px}.mobile-brand{display:inline;font-size:16px}.desktop-title,.header .status,.projection span{display:none}.projection{border:0;padding:0;width:30px}.projection svg{width:21px;height:21px}.content{padding:19px 16px 95px}.class-heading{flex-wrap:wrap;gap:13px;margin-bottom:18px}.class-heading>div:first-child{width:100%}.class-picker{width:100%;font-size:18px;border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:white}.class-heading p{font-size:11px;margin:7px 1px}.session-controls{width:100%;justify-content:space-between;gap:10px}.session-controls .btn{height:34px;font-size:12px}.stats-strip{padding:18px 0;margin-bottom:17px;border-radius:9px}.stats-strip>div{flex-direction:column;height:auto;gap:6px;position:relative}.stats-strip i{display:none}.stats-strip b{font-size:23px;order:-1}.stats-strip span{font-size:10px}.mobile-tabs{display:flex;background:white;border:1px solid var(--line);border-bottom:0;border-radius:9px 9px 0 0;padding:0 15px}.mobile-tabs button{width:50%;padding:13px 0;color:var(--muted);font-size:13px;border-bottom:2px solid transparent}.mobile-tabs button.active{color:var(--primary);border-color:var(--primary);font-weight:600}.layout{display:block}.seat-panel{border-radius:0 0 9px 9px;border-top:0}.map-toolbar{padding:16px;gap:8px}.map-toolbar h2{display:none}.map-toolbar .search{max-width:none;flex-basis:100%;height:39px;margin-bottom:3px}.search input{font-size:12px}.map-toolbar>.btn{flex:1;font-size:12px}.classroom-wrap{display:none}.mobile-seats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;padding:0 16px 18px}.mobile-seats .seat{height:102px;border-radius:7px;justify-content:center;padding:23px 10px 18px}.mobile-seats .pcno{font-size:11px;left:10px;top:9px}.mobile-seats .seat-name{font-size:17px;font-weight:550}.mobile-seats .mark-badge{font-size:10px;bottom:8px;left:10px}.mobile-seats .device-badge{font-size:10px;bottom:8px;right:8px}.mobile-seats .icons{right:8px;top:8px}.mobile-seats .filtered{display:none}.map-footer{padding:0 16px 18px}.map-footer .seat-help{display:none}.legend{font-size:10px;gap:18px}.side{display:none}.show-activity .seat-panel{display:none}.show-activity .side{display:flex}.show-activity .activity-panel{border-radius:0 0 9px 9px}.activity-panel,.tools-panel,.unseated-panel{padding:20px}.activity-list{max-height:none}.activity-event{padding-bottom:25px}.activity-event strong{font-size:13px}.activity-event p{font-size:12px}.bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fffffffa;border-top:1px solid var(--line);z-index:30;padding:10px 12px max(10px,env(safe-area-inset-bottom));backdrop-filter:blur(10px)}.bottom-nav button{display:flex;flex-direction:column;align-items:center;gap:5px;flex:1;font-size:10px;color:#81889d;padding:0}.bottom-nav button.active{color:var(--primary)}.bottom-nav svg{width:21px;height:21px}.section-heading{align-items:flex-start;margin:8px 0 18px}.section-heading h2{font-size:20px}.section-heading p{font-size:11px}.section-heading .btn{font-size:11px}.data-surface{padding:12px}.data-table th,.data-table td{padding:11px 6px;font-size:12px}.data-table .student-avatar{display:none}.data-table th:nth-child(3),.data-table td:nth-child(3){display:none}.backup-surface{padding:25px}.modal{padding:12px;align-items:center}.dialog{padding:22px 18px;max-height:88dvh}.dialog h2{font-size:19px}.dialog .form-row>*{flex-basis:40%;min-width:0}.modal-footer .btn{font-size:12px}.student-table{min-width:620px}.dialog .table-wrap{max-height:44dvh}.mark-grid{grid-template-columns:repeat(2,1fr)}.device-row{align-items:flex-start;flex-direction:column}.device-row .actions{align-self:flex-end}.presentation .classroom-wrap{display:block;overflow:auto}.presentation .mobile-seats{display:none}.presentation .classroom{min-width:900px}.presentation .room{min-height:75vh}.history-session-head{flex-wrap:wrap}.history-session-head small{font-size:11px}.overview-summary{grid-template-columns:repeat(2,1fr)}}
@media print{.navigation,.header,.class-heading,.stats-strip,.map-toolbar,.map-footer,.bottom-nav,.side,#exitProjection{display:none!important}.workspace{margin:0}.content{padding:0}.classroom-wrap{display:block!important}.mobile-seats{display:none!important}.room{min-height:500px}.seat-panel{border:0}.classroom{zoom:1;min-width:0}.layout{display:block}.seat{-webkit-print-color-adjust:exact;print-color-adjust:exact}}
/* 双端视觉校准 */
.seat .icons svg{width:9px;height:9px}.activity-event strong{font-size:12px}.activity-event p{font-size:12px}.activity-event time{font-size:10px}.seat-name{font-size:12px}.seat.disabled .seat-name{font-size:10px}.mark-badge{font-size:9px}.device-badge{font-size:8px}.legend{font-size:11px}.seat-help{font-size:10px}
@media(max-width:760px){.content{padding-top:14px}.class-picker{padding:8px 10px;font-size:17px}.class-heading{gap:9px;margin-bottom:14px}.class-heading p{margin-top:4px;font-size:10px}.stats-strip{padding:13px 0;margin-bottom:14px}.mobile-tabs button{padding:10px 0}.map-toolbar{padding:12px 16px}.map-toolbar .search{height:36px}.map-toolbar>.btn,.map-toolbar>.icon-btn{height:33px}.mobile-seats .seat{height:94px}.mobile-seats .seat-name{font-size:17px}.mobile-seats .icons svg{width:12px;height:12px}.legend{font-size:10px}}

.password-field{position:relative;display:block;min-width:0}.auth-dialog .password-field input{padding-right:48px}.password-toggle{position:absolute;right:1px;top:1px;width:42px;height:40px;display:flex;align-items:center;justify-content:center;border:0;border-radius:6px;background:transparent;color:#737c94;cursor:pointer}.password-toggle:hover{background:#f0f0ff;color:#5056d9}.password-toggle[aria-pressed="true"]{color:#5056d9}.password-toggle svg{width:20px;height:20px}

.changelog-list{max-width:880px;display:grid;gap:16px}.changelog-card{background:var(--surface,#fff);border:1px solid #e4e9e5;border-radius:16px;padding:24px}.changelog-card time{color:#68786e;font-size:13px}.changelog-card h3{margin:8px 0 12px}.changelog-card ul{margin:0;padding-left:20px;color:#526459;line-height:1.9}.class-order-list{max-height:50vh;overflow:auto}.class-order-row{display:flex;align-items:center;gap:8px;padding:12px 0;border-bottom:1px solid #e4e9e5}.class-order-row span{flex:1;min-width:0;overflow-wrap:anywhere}.class-order-row button{flex-shrink:0}.class-order-row button:disabled{opacity:.35;cursor:default}#classOrderError{color:#b43d4d}#classOrderBtn{margin-left:8px}
.navigation nav{min-height:0;overflow-y:auto;flex-shrink:1;padding-bottom:12px}.navigation .brand,.navigation .nav-bottom{flex-shrink:0}

.lesson-flow{padding:16px;margin-bottom:16px}.lesson-flow .device-row{gap:12px;flex-wrap:wrap}.lesson-flow .action-row{flex-wrap:wrap}#lessonTasks .hint{margin-top:12px}#lessonEndOptions{padding:12px 0}#lessonEndOptions label{display:block}

.lesson-flow .section-heading{margin:0 0 10px;align-items:center}.lesson-flow .section-heading h2{font-size:16px}.lesson-flow .device-row{padding:12px 0;margin:0}.lesson-flow .device-row p{margin:4px 0}.lesson-flow{margin-bottom:8px;padding:14px 18px}.lesson-flow .section-heading .btn{height:32px}

/* 教学控制位于座位图下方，侧栏专用于实时积分。 */
.classroom-teaching{display:flex;flex-direction:column;gap:12px;min-width:0}
.side>.classroom-teaching,.side>.live-score-panel{flex-shrink:0}
.classroom-teaching .learning-seat-toolbar{margin:0;padding:12px;gap:10px;min-width:0}
.classroom-teaching .learning-seat-toolbar label{width:100%;display:flex;flex-wrap:nowrap;min-width:0}
.classroom-teaching .learning-seat-toolbar select{flex:1;width:0;min-width:0;max-width:100%}
.classroom-teaching .learning-seat-toolbar>span{width:100%;margin-left:0;overflow-wrap:anywhere}
.classroom-teaching .lesson-flow{margin:0;padding:14px;background:#fff;border:1px solid var(--line);border-radius:11px;min-width:0;overflow-wrap:anywhere}
.classroom-teaching .lesson-flow .section-heading{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between}
.classroom-teaching .lesson-flow .section-heading h2{font-size:14px}
.classroom-teaching .lesson-flow .action-row{gap:8px}
.classroom-teaching .lesson-flow .device-row>div{min-width:0;max-width:100%}

.seat-panel>.classroom-teaching{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:18px;border-top:1px solid var(--line)}
.classroom-teaching>.learning-seat-toolbar{order:0;align-content:start}
.classroom-teaching>.panel:not(.lesson-flow){order:1;padding:14px;border:1px solid var(--line);border-radius:11px;min-width:0}
.classroom-teaching>.lesson-flow{order:2}
.seat-panel>.demo-activity{margin:0 18px 18px}
@media(max-width:760px){.seat-panel>.classroom-teaching{grid-template-columns:minmax(0,1fr);padding:16px}.seat-panel>.demo-activity{margin:0 16px 16px}}
@media print{.classroom-teaching,.demo-activity,.quick-score-bar{display:none!important}}

/* 教学中心沿用工作台内容区，不再显示嵌入外框。 */
.teaching-center-frame{display:block;width:100%;height:calc(100dvh - 145px);min-height:600px;border:0;border-radius:0;background:var(--bg)}