/* Final typography and alignment pass; loaded after all legacy styles. */
:root{--type-page:25px;--type-card:16px;--type-meta:12px}
body{font-size:15px;line-height:1.6}.page,.page *{min-width:0}.section-title{font-size:var(--type-page);line-height:1.3}.section-desc{font-size:14px;line-height:1.7}
.teacher-panel-head h3,.class-task-head h3,.student-detail-section h4,.task-detail-section h4{font-size:var(--type-card);line-height:1.45}.teacher-panel-head span,.class-task-head p{font-size:var(--type-meta);line-height:1.5}
/* Home */
#page-home .hero{display:flex;flex-direction:column;justify-content:center}#page-home .hero h1{font-size:clamp(34px,4vw,46px);line-height:1.24}#page-home .hero p{font-size:15px;line-height:1.75}
.hero-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;align-items:stretch;max-width:780px;padding-top:20px}.hstat{display:flex;align-items:baseline;justify-content:flex-start;gap:8px;min-height:44px;padding:0 20px;border:0;border-left:1px solid rgba(255,255,255,.18);border-radius:0;background:transparent;box-shadow:none;text-align:left;backdrop-filter:none}.hstat:first-child{padding-left:0;border-left:0}.hstat .n{flex:0 0 auto;margin:0;color:#fff;font-size:34px;font-weight:750;line-height:1}.hstat .l{margin:0;color:rgba(255,255,255,.78);font-size:13px;line-height:1.35}
.flow-step h3,.feature h3,.scene h3{font-size:var(--type-card);line-height:1.45}.flow-step p,.feature p,.scene p{font-size:14px;line-height:1.75}
/* Library */
.lib-filter button{min-height:42px;font-size:13px}.lib-head{display:flex;min-height:112px;flex-direction:column;align-items:flex-start;justify-content:flex-end}.lib-head h3{font-size:19px;line-height:1.35}.lib-count,.lib-tag,.lib-move-tag{font-size:12px;line-height:1.45}.lib-body{font-size:14px}.lib-go{min-height:44px;font-size:14px}
/* Assessment */
#page-assess .assess-head .section-title{font-size:var(--type-page)}#page-assess .assess-head .section-desc{font-size:13px}#page-assess .assess-status{min-height:36px;padding:6px 11px;font-size:12px}
#page-assess .assess-toolbar{display:grid;grid-template-columns:minmax(180px,.8fr) minmax(280px,1.35fr) auto auto;align-items:end;gap:10px;padding:10px}#page-assess .assess-toolbar label{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;width:auto;max-width:none;min-height:44px;gap:8px;font-size:13px}#page-assess .assess-field-gongfa,#page-assess .assess-field-form{width:auto;max-width:none}#page-assess .assess-field-label{font-size:12px;line-height:1.3}#page-assess .assess-toolbar select{width:100%;height:40px;min-height:40px;font-size:14px}#page-assess .move-mode-toggle,#page-assess .voice-control{height:40px;min-height:40px}#page-assess .move-mode-toggle button,#page-assess .voice-control{font-size:13px}
.assess-camera-column::before,.assess-feedback-column::before{font-size:12px}#page-assess .hint{font-size:12px;line-height:1.6}#page-assess .student-task-eyebrow,#page-assess .student-task-meta,#page-assess .student-task-form{font-size:12px}#page-assess .student-task-title{font-size:15px}#page-assess .student-task-forms{max-height:none;overflow:visible}#page-assess .student-task-actions button{min-height:40px;font-size:13px}#page-assess .score-advice{font-size:13px;line-height:1.7}#page-assess .core-name{font-size:12px}#page-assess .core-score{font-size:26px}#page-assess .dim{padding:11px 12px}#page-assess .dim-head{gap:10px;font-size:13px}#page-assess .dim-score{font-size:16px}#page-assess .dim-detail{overflow:visible;color:#667870;font-size:12px;line-height:1.55;text-overflow:clip;white-space:normal;overflow-wrap:anywhere}#page-assess .checklist-head,#page-assess .teaching-guide-head h3{font-size:16px}
/* Student tasks */
.student-task-summary-item{display:flex;min-height:100px;flex-direction:column;justify-content:center}.student-task-summary-value{font-size:28px;line-height:1.1}.student-task-summary-label{margin-top:7px;font-size:12px;line-height:1.4}.student-task-page-card h4,.class-task-name{font-size:16px;line-height:1.45}.student-task-page-info,.student-task-page-progress-head,.class-task-detail,.class-task-progress-head{font-size:12px;line-height:1.55}.student-task-form,.class-task-item,.class-task-state{font-size:12px;line-height:1.35}.student-task-page-empty,.task-empty{font-size:13px;line-height:1.65}.task-primary-btn,.task-secondary-btn,.task-delete-btn,.task-text-btn{min-height:42px;font-size:13px}
/* Records */
#page-records .rec-stat{display:flex;flex-direction:column;justify-content:center}#page-records .rec-stat .num{font-size:29px;line-height:1.1}#page-records .rec-stat .lbl{margin-top:7px;font-size:12px;line-height:1.4}#page-records .rec-row{font-size:13px;line-height:1.6}#page-records .rec-score{font-size:20px}
/* Teacher workspace */
.teacher-context strong{font-size:15px}.teacher-context span:not(.prototype-badge),.prototype-badge{font-size:12px}.teacher-toolbar{align-items:center;row-gap:9px}.teacher-toolbar select,.teacher-action{min-height:42px;font-size:13px}.metric-label{font-size:12px;line-height:1.4}.metric-value{font-size:30px;line-height:1.1}.metric-change{font-size:12px;line-height:1.45}.error-row-head{font-size:13px}.trend-bar::after,.student-mini-bar::after{font-size:11px}.teacher-table th,.teacher-record-table th{font-size:13px;line-height:1.4;white-space:nowrap}.teacher-table td,.teacher-record-table td{font-size:13px}.risk-tag,.student-detail-btn,.student-status{font-size:12px}.student-meta p,.student-summary-label,.student-score-row,.student-recent-row{font-size:12px}.student-demo-note{font-size:12px;line-height:1.6}
/* Modals and forms */
.modal-head h3{font-size:18px;line-height:1.4}.modal-body{font-size:14px}.task-field label,.task-form-options b,.task-detail-section h4{font-size:13px}.task-field-hint,.task-form-options small,.task-field-error,.task-detail-stat span,.task-dist-row,.task-roster-row,.task-roster-more,.task-step-toolbar,.task-step-kind{font-size:12px;line-height:1.5}.task-field input,.task-field select,.class-create input{min-height:44px;font-size:14px}.task-form-options>label{min-height:64px}.task-detail-stat b{font-size:24px}.report-score .rl,.report-meta{font-size:12px;line-height:1.55}.report-advice{font-size:14px}.login-role-card strong{font-size:16px}.login-role-card span{font-size:13px;line-height:1.55}
@media(max-width:980px){#page-assess .assess-toolbar{grid-template-columns:minmax(160px,.8fr) minmax(240px,1.2fr) auto}#page-assess .voice-control{grid-column:1/-1;width:max-content;margin-left:0}.teacher-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){:root{--type-page:22px}#page-home .hero h1{font-size:30px}#page-home .hero p{font-size:14px}.hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:18px}.hstat{padding:0 14px}.hstat:nth-child(3){padding-left:0;border-left:0}.hstat .n{font-size:30px}#page-assess .assess-toolbar{grid-template-columns:1fr;align-items:stretch}#page-assess .voice-control{grid-column:auto;width:100%;justify-content:space-between}#page-assess .move-mode-toggle{display:grid;grid-template-columns:1fr 1fr}.student-task-page-head,.teacher-context{align-items:flex-start;flex-direction:column}.teacher-metrics{grid-template-columns:1fr 1fr}.teacher-table th,.teacher-record-table th,.teacher-table td,.teacher-record-table td{font-size:12px}}
@media(max-width:460px){.hstat{align-items:flex-start;flex-direction:column;gap:4px}.teacher-metrics,.student-task-summary,#page-records .rec-stats{grid-template-columns:1fr}.task-form-options,.task-detail-summary{grid-template-columns:1fr}}

/* Task publishing and library identity refinement. */
.lib-index{display:flex;align-items:baseline;gap:8px;margin-bottom:9px;color:rgba(255,255,255,.78)}
.lib-index span{font-family:"DIN Alternate","Bahnschrift","Segoe UI",sans-serif;font-size:15px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums}
.lib-index small{padding-left:8px;border-left:1px solid rgba(255,255,255,.34);font-size:11px;font-weight:650;line-height:1.2}
.task-modal{width:min(960px,calc(100vw - 48px));max-width:960px;max-height:calc(100dvh - 40px)}
.task-modal .modal-body{padding:18px 20px 22px}
.task-modal .task-form{gap:16px}
.task-form-options{grid-template-columns:repeat(4,minmax(0,1fr));max-height:360px;gap:9px;padding:2px 4px 2px 2px}
.task-form-options>label{align-items:flex-start;min-height:96px;padding:11px 10px}
.task-form-options>label>span{align-content:start}
.task-form-options b{line-height:1.45}
.task-form-options small{line-height:1.45}
.task-audience-control{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));width:min(420px,100%);padding:3px;border:1px solid #cbd9d2;border-radius:6px;background:#eef3f0}
.task-audience-control label{display:block;margin:0;cursor:pointer}
.task-audience-control input{position:absolute;width:1px;height:1px;overflow:hidden;opacity:0;pointer-events:none}
.task-audience-control span{display:flex;align-items:center;justify-content:center;min-height:40px;padding:7px 14px;border-radius:4px;color:#5f7269;font-size:13px;font-weight:700;transition:background-color .16s ease,color .16s ease,box-shadow .16s ease}
.task-audience-control input:checked+span{background:#fff;color:#155b47;box-shadow:0 2px 7px rgba(21,72,56,.12)}
.task-audience-control input:focus-visible+span{outline:3px solid rgba(53,122,164,.25);outline-offset:1px}
.task-assignee-field{display:grid;grid-template-columns:90px minmax(0,330px);align-items:center;gap:10px;margin-top:10px}
.task-assignee-field[hidden]{display:none}
.task-assignee-field label{margin:0}
.task-assignee-field select{width:100%;min-height:44px;padding:8px 34px 8px 10px;border:1px solid #b9ccc2;border-radius:6px;background:#fff;color:#243b32;font-size:14px}
.class-task-title-row{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.class-task-audience{display:inline-flex;align-items:center;min-height:24px;padding:3px 7px;border:1px solid #c7dbd2;border-radius:4px;background:#edf6f2;color:#28644f;font-size:11px;font-weight:750;line-height:1.3}
.class-task-audience.personal{border-color:#d8c7a7;background:#faf3e6;color:#7a5823}
@media(max-width:840px){.task-form-options{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:680px){.task-modal{width:calc(100vw - 20px);max-height:calc(100dvh - 20px)}.task-form-options{grid-template-columns:repeat(2,minmax(0,1fr))}.task-assignee-field{grid-template-columns:1fr}.task-assignee-field label{margin-bottom:-4px}}
@media(max-width:460px){.task-form-options{grid-template-columns:1fr}.task-audience-control{width:100%}}
/* Library contrast and multi-student assignment. */
.lib-head h3{color:#fff!important;text-shadow:0 1px 2px rgba(0,0,0,.2)}
.lib-head .lib-alias{color:rgba(255,255,255,.86);font-size:12px;line-height:1.5}
.lib-head .lib-count{border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.12);color:#fff}
.task-assignee-field{display:block;margin-top:10px;padding:10px;border:1px solid #cfddd6;border-radius:6px;background:#f8faf9}
.task-assignee-field[hidden]{display:none}
.task-assignee-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.task-assignee-head span{margin-right:auto;color:#496158;font-size:12px;font-weight:750}
.task-assignee-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;max-height:174px;overflow-y:auto;overscroll-behavior:contain;padding:2px 3px 2px 2px}
.task-assignee-options label{display:flex;align-items:center;gap:8px;min-height:38px;margin:0;padding:7px 8px;border:1px solid #d7e2dc;border-radius:5px;background:#fff;color:#455d54;font-size:12px;cursor:pointer;transition:border-color .15s ease,background-color .15s ease,color .15s ease}
.task-assignee-options label:has(input:checked){border-color:#78a995;background:#eaf4ef;color:#185d47}
.task-assignee-options input{flex:0 0 auto;width:16px;height:16px;min-height:0;margin:0;accent-color:#176b55}
.task-assignee-options input:focus-visible{outline:3px solid rgba(53,122,164,.25);outline-offset:2px}
@media(max-width:760px){.task-assignee-options{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:560px){.task-assignee-options{grid-template-columns:repeat(2,minmax(0,1fr))}.task-assignee-head{flex-wrap:wrap}.task-assignee-head span{width:100%;margin-right:0}}
/* Task editing and student notifications. */
.notification-entry{position:relative;display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:8px 13px;border:1px solid #c8d8d0;border-radius:6px;background:#fff;color:#245749;font-size:13px;font-weight:750;cursor:pointer;transition:border-color .16s ease,background-color .16s ease,color .16s ease}
.notification-entry:hover{border-color:#78a995;background:#edf6f2;color:#155b47}
.notification-entry[hidden]{display:none}
.notification-entry b{position:absolute;top:-7px;right:-7px;display:grid;place-items:center;min-width:20px;height:20px;padding:0 5px;border:2px solid #fff;border-radius:10px;background:#c84f45;color:#fff;font-size:10px;line-height:1;font-variant-numeric:tabular-nums}
.notification-entry b[hidden]{display:none}
.notification-modal{width:min(620px,calc(100vw - 32px));max-width:620px}
.notification-head-actions{display:flex;align-items:center;gap:8px}
.notification-head-actions>button:first-child{min-height:34px;padding:6px 10px;border:1px solid #c8d8d0;border-radius:5px;background:#fff;color:#28644f;font-size:12px;font-weight:700;cursor:pointer}
.notification-list{display:flex;max-height:68vh;flex-direction:column;gap:8px;overflow-y:auto}
.notification-item{display:grid;grid-template-columns:10px minmax(0,1fr);gap:10px;width:100%;padding:13px 14px;border:1px solid #dbe5e0;border-radius:7px;background:#fff;color:#30483f;text-align:left;cursor:pointer;transition:border-color .16s ease,background-color .16s ease}
.notification-item:hover{border-color:#91b6a6;background:#f6faf8}
.notification-item.unread{border-color:#a9cbbd;background:#edf7f2}
.notification-state{width:8px;height:8px;margin-top:6px;border-radius:50%;background:#c2cec8}
.notification-item.unread .notification-state{background:#17705a;box-shadow:0 0 0 4px rgba(23,112,90,.1)}
.notification-content{display:flex;min-width:0;flex-direction:column;gap:4px}
.notification-content b{color:#173f33;font-size:14px;line-height:1.4}
.notification-content>span{color:#5d7067;font-size:13px;line-height:1.6;overflow-wrap:anywhere}
.notification-content small{color:#89978f;font-size:11px}
.notification-empty{padding:40px 18px;color:#7b8c84;font-size:13px;text-align:center}
.notification-toast{position:fixed;z-index:2200;top:82px;right:22px;display:flex;width:min(360px,calc(100vw - 28px));padding:14px 16px;border:1px solid #9fc5b5;border-left:4px solid #17705a;border-radius:7px;background:#fff;box-shadow:0 16px 38px rgba(23,65,52,.2);color:#24483c;flex-direction:column;gap:3px;text-align:left;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(-12px);transition:opacity .2s ease,transform .2s ease}
.notification-toast.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.notification-toast span{color:#17705a;font-size:11px;font-weight:800}
.notification-toast b{font-size:14px;line-height:1.4}
.notification-toast small{color:#60736a;font-size:12px;line-height:1.5}
.task-edit-btn{min-height:42px;padding:8px 13px;border:1px solid #bbcfC5;border-radius:6px;background:#f7faf8;color:#28644f;font-size:13px;font-weight:700;cursor:pointer}
.task-edit-btn:hover{border-color:#6fa28d;background:#eaf4ef}
@media(max-width:760px){.notification-entry{min-height:38px;padding:7px 10px}.notification-toast{top:70px;right:14px}.class-task-actions{flex-wrap:wrap}}
/* Teacher reference videos and DTW template management. */
.reference-media-section{margin:0 0 20px;border:1px solid #d8e5df;border-top:3px solid #b88a3d;border-radius:8px;background:#fff;box-shadow:0 7px 22px rgba(31,69,56,.07);overflow:hidden}
.reference-media-head{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 20px 14px;border-bottom:1px solid #e4ece8}
.reference-media-head h3{margin-top:2px;color:#183c31;font-family:"Noto Serif SC","Songti SC","STSong",serif;font-size:18px;line-height:1.4}
.reference-media-head p{margin-top:3px;color:#71827a;font-size:12px;line-height:1.5}.reference-eyebrow{color:#a0732d;font-size:10px;font-weight:850;letter-spacing:0}
.reference-media-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-bottom:1px solid #e5ece9;background:#f7faf8}
.reference-media-summary>div{display:flex;min-height:66px;align-items:center;justify-content:center;gap:9px;border-right:1px solid #e1e9e5}.reference-media-summary>div:last-child{border-right:0}
.reference-media-summary b{color:#184f3e;font-size:23px;font-variant-numeric:tabular-nums}.reference-media-summary span{color:#708078;font-size:12px}
.reference-video-list{display:grid;gap:10px;padding:14px}.reference-action-card{border:1px solid #dde7e2;border-radius:7px;background:#fff;overflow:hidden}
.reference-action-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 14px;background:#f8faf9}.reference-action-head>div:first-child>span{color:#71827a;font-size:10px;font-weight:750}
.reference-action-head h4{margin-top:2px;color:#1c4135;font-family:"Noto Serif SC","Songti SC","STSong",serif;font-size:15px}.reference-weight{display:flex;min-width:108px;flex-direction:column;align-items:flex-end}
.reference-weight b{color:#7a877f;font-size:14px}.reference-weight.active b{color:#187158}.reference-weight span{margin-top:2px;color:#84928b;font-size:10px}
.reference-files{display:grid}.reference-file-row{display:grid;grid-template-columns:48px minmax(160px,1fr) 70px 94px 82px;align-items:center;gap:9px;padding:9px 12px;border-top:1px solid #edf2ef;color:#718078;font-size:11px}
.reference-kind{display:inline-flex;justify-content:center;padding:3px 5px;border-radius:4px;background:#e6f3ed;color:#176a51;font-size:10px;font-weight:800}.reference-kind.excellent{background:#fbf1df;color:#96691f}
.reference-file-name{min-width:0;overflow:hidden;border:0;background:none;color:#284d40;font:inherit;font-weight:700;text-align:left;text-overflow:ellipsis;white-space:nowrap;cursor:pointer}.reference-file-name:hover{color:#137258;text-decoration:underline}
.reference-row-actions{display:flex;align-items:center;justify-content:flex-end;gap:3px}.reference-edit,.reference-delete{height:30px;border:0;border-radius:5px;background:transparent;cursor:pointer}.reference-edit{padding:0 7px;color:#276650;font-size:11px;font-weight:750}.reference-edit:hover{background:#eaf4ef}.reference-delete{display:grid;width:30px;place-items:center;color:#a45244;font-size:19px}.reference-delete:hover{background:#faece8}
.reference-empty{display:flex;min-height:110px;align-items:center;justify-content:center;flex-direction:column;gap:5px;color:#7b8b84;text-align:center}.reference-empty b{color:#52675e;font-size:14px}.reference-empty span{font-size:12px;line-height:1.5}
.reference-upload-modal{width:min(700px,calc(100vw - 36px));max-width:700px}.reference-upload-form{display:grid;gap:14px}.reference-select-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.reference-scope{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 12px;border-left:3px solid #b88a3d;border-radius:0 6px 6px 0;background:#faf6ed}.reference-scope b{color:#503f24;font-size:13px}.reference-scope span{color:#806d4d;font-size:11px;text-align:right}
.reference-drop{display:grid;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:12px;min-height:78px;padding:12px 14px;border:1px dashed #b9cdc4;border-radius:7px;background:#f9fbfa;cursor:pointer;transition:border-color .16s ease,background-color .16s ease}.reference-drop:hover{border-color:#4f9179;background:#f3f8f5}.reference-drop.required{border-style:solid;border-left:4px solid #187158}
.reference-drop[hidden]{display:none}.reference-drop input{position:absolute;width:1px;height:1px;overflow:hidden;opacity:0;pointer-events:none}.reference-drop-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:#e3f1eb;color:#17674f;font-family:"Noto Serif SC","Songti SC",serif;font-size:16px;font-weight:800}.reference-drop:not(.required) .reference-drop-mark{background:#f8eedc;color:#93651d}
.reference-drop>span:nth-of-type(2){display:flex;min-width:0;flex-direction:column;gap:4px}.reference-drop b{color:#24473b;font-size:14px}.reference-drop small{color:#75867e;font-size:11px;line-height:1.5}.reference-file-action{padding:7px 10px;border:1px solid #b6c9c0;border-radius:5px;background:#fff;color:#28644f;font-size:11px;font-weight:750}.reference-selected-files{display:grid;margin-top:-7px;border:1px solid #dce7e2;border-top:0;border-radius:0 0 7px 7px;background:#fff}.reference-selected-files[hidden]{display:none}.reference-selected-file{display:grid;grid-template-columns:24px minmax(0,1fr) 68px 30px;align-items:center;gap:8px;min-height:40px;padding:5px 10px;border-top:1px solid #edf2ef}.reference-selected-file:first-child{border-top:0}.reference-selected-index{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#e8f2ed;color:#21634f;font-size:10px;font-weight:800}.reference-selected-name{min-width:0;overflow:hidden;color:#294b40;font-size:12px;font-weight:700;text-overflow:ellipsis;white-space:nowrap}.reference-selected-size{color:#7b8983;font-size:10px;text-align:right}.reference-selected-remove{display:grid;place-items:center;width:28px;height:28px;border:0;border-radius:5px;background:transparent;color:#a45244;font-size:18px;cursor:pointer}.reference-selected-remove:hover{background:#faece8}
.reference-progress{height:7px;overflow:hidden;border-radius:4px;background:#e5ece8}.reference-progress[hidden]{display:none}.reference-progress span{display:block;width:0;height:100%;border-radius:4px;background:#1c755b;transition:width .2s ease}
.reference-upload-status{min-height:20px;color:#687a72;font-size:12px;line-height:1.55}.reference-upload-status[data-state="error"]{color:#b64d3b}.reference-upload-status[data-state="success"]{color:#176b51;font-weight:700}#referenceUploadSubmit:disabled{cursor:wait;opacity:.62}
@media(max-width:700px){.reference-media-head{align-items:flex-start}.reference-file-row{grid-template-columns:44px minmax(120px,1fr) 82px}.reference-file-row>span:nth-of-type(2),.reference-file-row>span:nth-of-type(3){display:none}.reference-select-grid{grid-template-columns:1fr}.reference-scope{align-items:flex-start;flex-direction:column;gap:3px}.reference-scope span{text-align:left}}
@media(max-width:500px){.reference-media-head{flex-direction:column}.reference-media-head .teacher-action{width:100%}.reference-media-summary{grid-template-columns:1fr}.reference-media-summary>div{min-height:48px;border-right:0;border-bottom:1px solid #e1e9e5}.reference-media-summary>div:last-child{border-bottom:0}.reference-drop{grid-template-columns:40px minmax(0,1fr)}.reference-file-action{display:none}}
/* 动作拆解示范图：三阶段轨迹与文字步骤保持一一对应 */
.guide-visual{margin:0;background:#f5f8f6;border-bottom:1px solid #dce8e2;overflow:hidden}
.guide-visual img{display:block;width:100%;height:auto;aspect-ratio:25/8;object-fit:contain;background:#ebf2ee}
.guide-visual figcaption{display:flex;align-items:center;gap:10px;padding:9px 15px;border-top:1px solid #dce8e2;background:#f8fbf9;color:#667870}
.guide-visual figcaption b{flex:0 0 auto;color:#1d5948;font-size:12px;white-space:nowrap}
.guide-visual figcaption span{min-width:0;font-size:11px;line-height:1.5}
.error-student-count{display:block;margin:-1px 0 6px;color:#78877f;font-size:10px}
@media(max-width:760px){.guide-visual img{min-height:150px;object-fit:contain}.guide-visual figcaption{align-items:flex-start;flex-direction:column;gap:3px;padding:9px 12px}.guide-visual figcaption span{display:block}}