课堂小志文字蒙版效果
在课堂小志场景中完成文字蒙版效果：包含真实内容、可操作控件、清晰状态反馈和跨尺寸布局。
启用 JavaScript 后可编辑、运行和保存此案例。固定源码如下：
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<header class="mast"><div><span class="eyebrow">editorial / 文字蒙版效果 / INTERMEDIATE</span><h1>课堂小志文字蒙版效果</h1><p class="intro">在课堂小志场景中完成文字蒙版效果：包含真实内容、可操作控件、清晰状态反馈和跨尺寸布局。</p></div><span class="scenario">课堂小志</span></header>
<div class="composition-split"><aside class="split-note"><b>CASE 02</b><span>掌握文字蒙版效果的语义结构、响应式编排、键盘操作与状态同步。</span></aside><section class="demo" aria-label="课堂小志文字蒙版效果交互区域"><section id="evidenceShell" class="evidence-shell" data-board-mode="scan"><header class="evidence-head"><div><span class="eyebrow">课堂小志 / EVIDENCE BOARD</span><h2>文字蒙版效果观测面板</h2><p>把主案例放入证据看板，用单独的观察卡片、日志和模式切换记录当前结果。</p></div><div class="evidence-tools"><div class="row"><button class="action primary" type="button" data-board-mode="scan">扫描</button><button class="action" type="button" data-board-mode="proof">核验</button><button class="action" type="button" data-board-mode="handoff">交接</button></div><output id="evidenceStatus">等待采样</output></div></header><div class="evidence-body"><section class="evidence-stage"><div class="evidence-ribbon"><button type="button" data-evidence-card="0" aria-pressed="true"><span>01</span><strong>课堂小志计划</strong><small>检查状态变化是否可见</small></button><button type="button" data-evidence-card="1" aria-pressed="false"><span>02</span><strong>课堂小志灵感</strong><small>确认键盘与点击入口一致</small></button><button type="button" data-evidence-card="2" aria-pressed="false"><span>03</span><strong>课堂小志记录</strong><small>观察布局在窄屏下是否回退</small></button><button type="button" data-evidence-card="3" aria-pressed="false"><span>04</span><strong>课堂小志协作</strong><small>记录当前复核结论</small></button></div><div id="evidenceCoreShell" class="evidence-core-shell"><div class="workflow-guide"><nav class="guide-rail" aria-label="课堂小志引导"><span class="eyebrow">课堂小志 GUIDE</span><ol><li data-workflow-guide-step="0" aria-current="step"><b>1</b><span>课堂小志版式调整</span></li><li data-workflow-guide-step="1"><b>2</b><span>课堂小志重点强调</span></li><li data-workflow-guide-step="2"><b>3</b><span>课堂小志阅读完成</span></li></ol><div class="guide-actions"><button id="workflowGuideBack" class="action" type="button" disabled>上一步</button><button id="workflowGuideNext" class="action primary" type="button">完成本步</button></div><div id="workflowGuideProgress" role="progressbar" aria-label="课堂小志完成度" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><i></i></div></nav><section id="workflowCore" class="workflow-core guide-core" data-guide-step="0" aria-describedby="workflowGuideInstruction"><p id="workflowGuideInstruction">请在主案例中完成“课堂小志版式调整”相关操作。</p><!-- 11DZ_CORE_START:typography-text-text-mask --><div class="text-mask-lab"><header class="mask-controls panel"><div><span class="eyebrow">TEXT MASK</span><h2>文字蒙版效果</h2></div><label>渐变角度 <input id="maskAngle" type="range" min="0" max="360" value="125" data-core-bridge="typography-text-text-mask"><output id="maskAngleValue">125°</output></label><div class="row"><button id="maskPalette" class="action" type="button">切换色谱</button><button id="maskPause" class="action" type="button" aria-pressed="false">暂停流动</button></div></header><section class="mask-stage" aria-label="课堂小志文字蒙版预览"><p>课堂小志</p><h3 id="maskedHeading">让颜色只在文字内部流动</h3><small>真实文字仍保留在文档中，可选择、缩放并被辅助技术读取。</small></section></div><!-- 11DZ_CORE_END --></section><aside class="guide-evidence"><details id="workflowGuideDetails"><summary>查看验收要求</summary><ul><li>课堂小志版式调整需要一次可见状态变化</li><li>课堂小志重点强调需要一次可见状态变化</li><li>课堂小志阅读完成需要一次可见状态变化</li></ul></details><form id="workflowGuideEvidenceForm"><label>本步证据<textarea id="workflowGuideEvidence" rows="3" placeholder="记录观察到的状态"></textarea></label><input class="action" type="submit" value="保存证据"></form><output id="workflowGuideSummary">0 / 3 步完成</output></aside></div></div></section><aside class="evidence-rail"><label>画布缩放<input id="evidenceZoom" type="range" min="88" max="128" value="100"><output id="evidenceZoomValue">100%</output></label><label>当前取样<select id="evidenceStep"><option value="0">课堂小志计划</option><option value="1">课堂小志灵感</option><option value="2">课堂小志记录</option><option value="3">课堂小志协作</option></select></label><ul id="evidenceChecklist" class="evidence-checklist"><li>课堂小志计划</li><li>课堂小志灵感</li><li>课堂小志记录</li><li>课堂小志协作</li></ul><button id="evidenceCapture" class="action primary" type="button">写入证据</button><ol id="evidenceLog" class="evidence-log"><li>尚未写入证据</li></ol></aside></div></section><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
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const workflowGuideCore=document.querySelector('#workflowCore');const workflowGuideStages=["课堂小志版式调整","课堂小志重点强调","课堂小志阅读完成"];const workflowGuideState={step:0,completed:new Set(),evidence:new Map(),consumedVersion:0};function workflowGuideDrive(){const step=workflowGuideState.step;workflowGuideCore.dataset.guideStep=String(step);document.querySelector('#workflowGuideInstruction').textContent='请在主案例中完成“'+workflowGuideStages[step]+'”相关操作。';document.querySelectorAll('[data-workflow-guide-step]').forEach((item,index)=>{item.classList.toggle('is-complete',workflowGuideState.completed.has(index));if(index===step)item.setAttribute('aria-current','step');else item.removeAttribute('aria-current');});document.querySelector('#workflowGuideBack').disabled=step===0;document.querySelector('#workflowGuideNext').textContent=step===workflowGuideStages.length-1?'应用版面':'完成本步';const percent=Math.round(workflowGuideState.completed.size/workflowGuideStages.length*100);const progress=document.querySelector('#workflowGuideProgress');progress.setAttribute('aria-valuenow',String(percent));progress.querySelector('i').style.width=percent+'%';document.querySelector('#workflowGuideSummary').textContent=workflowGuideState.completed.size+' / '+workflowGuideStages.length+' 步完成 · '+workflowBridgeSummary();announce('课堂小志当前步骤：'+workflowGuideStages[step]);}function workflowGuideAdvance(direction){if(direction>0){const bridge=workflowBridgeActivate();const version=Number(workflowGuideCore.dataset.workflowVersion||0);if(version<=workflowGuideState.consumedVersion){announce('请先完成主案例的可见状态变化');return;}workflowGuideState.consumedVersion=version;workflowGuideState.completed.add(workflowGuideState.step);announce('已记录主案例变化 · '+bridge.summary);}workflowGuideState.step=Math.max(0,Math.min(workflowGuideStages.length-1,workflowGuideState.step+direction));workflowGuideDrive();}document.querySelector('#workflowGuideBack').addEventListener('click',()=>workflowGuideAdvance(-1));document.querySelector('#workflowGuideNext').addEventListener('click',()=>workflowGuideAdvance(1));document.querySelector('#workflowGuideEvidenceForm').addEventListener('submit',event=>{event.preventDefault();const version=Number(workflowGuideCore.dataset.workflowVersion||0);if(version<=workflowGuideState.consumedVersion){announce('证据未保存：主案例尚无新变化');return;}const text=document.querySelector('#workflowGuideEvidence').value.trim();workflowGuideState.evidence.set(workflowGuideState.step,text||'已完成可见状态检查');workflowGuideState.completed.add(workflowGuideState.step);workflowGuideState.consumedVersion=version;workflowGuideDrive();announce('本步证据已保存 · '+workflowBridgeSummary());});document.querySelector('#workflowGuideDetails').addEventListener('toggle',event=>announce(event.currentTarget.open?'已展开验收要求':'已收起验收要求'));workflowGuideDrive();
workflowBridgeReset();
const evidenceShell=document.querySelector('#evidenceShell');const evidenceStatus=document.querySelector('#evidenceStatus');const evidenceZoom=document.querySelector('#evidenceZoom');const evidenceZoomValue=document.querySelector('#evidenceZoomValue');const evidenceStep=document.querySelector('#evidenceStep');const evidenceChecklistItems=[...document.querySelectorAll('#evidenceChecklist li')];const evidenceCards=[...document.querySelectorAll('[data-evidence-card]')];const evidenceLog=document.querySelector('#evidenceLog');const evidenceModeButtons=[...evidenceShell.querySelectorAll('button[data-board-mode]')];const evidenceNotes=["课堂小志计划","课堂小志灵感","课堂小志记录","课堂小志协作"];const evidenceCore=document.querySelector('#workflowCore');let evidenceCaptures=0;function evidenceSetCard(index){evidenceCards.forEach((card,cardIndex)=>{const active=cardIndex===index;card.setAttribute('aria-pressed',String(active));});evidenceChecklistItems.forEach((item,itemIndex)=>{item.classList.toggle('is-active',itemIndex===index);item.classList.toggle('is-done',itemIndex<evidenceCaptures);});}function evidenceRender(reason){const version=evidenceCore?.dataset.workflowVersion||'0';const zoom=Number(evidenceZoom.value);const active=Math.min(evidenceNotes.length-1,Number(evidenceStep.value)||0);evidenceShell.style.setProperty('--evidence-zoom',String(zoom));evidenceZoomValue.textContent=zoom+'%';evidenceSetCard(active);evidenceStatus.textContent=reason+' · 核心版本 '+version;}evidenceModeButtons.forEach(button=>button.addEventListener('click',()=>{evidenceModeButtons.forEach(item=>item.classList.toggle('primary',item===button));evidenceShell.dataset.boardMode=button.dataset.boardMode;evidenceRender('已切换到'+button.textContent);announce('证据模式：'+button.textContent);}));evidenceCards.forEach((card,index)=>card.addEventListener('click',()=>{evidenceStep.value=String(index);evidenceRender('已切换观察卡片');announce('观察卡片：'+evidenceNotes[index]);}));evidenceZoom.addEventListener('input',()=>{evidenceRender('画布缩放已更新');announce('观测缩放 '+evidenceZoom.value+'%');});evidenceStep.addEventListener('change',()=>{const index=Number(evidenceStep.value)||0;evidenceRender('已切换取样');announce('当前取样：'+evidenceNotes[index]);});document.querySelector('#evidenceCapture').addEventListener('click',()=>{const index=Math.min(evidenceNotes.length-1,Number(evidenceStep.value)||0);const note=evidenceNotes[index];const version=evidenceCore?.dataset.workflowVersion||'0';evidenceCaptures+=1;const item=document.createElement('li');item.textContent='证据 '+evidenceCaptures+' · '+note+' · 核心版本 '+version;const empty=evidenceLog.querySelector('li')?.textContent==='尚未写入证据';if(empty)evidenceLog.replaceChildren(item);else evidenceLog.prepend(item);while(evidenceLog.children.length>6)evidenceLog.lastElementChild.remove();evidenceRender('已写入证据 '+evidenceCaptures);announce('已写入证据 '+evidenceCaptures+' · '+note);});evidenceCore?.addEventListener('focusin',()=>evidenceRender('主案例获得焦点'));evidenceCore?.addEventListener('click',()=>evidenceRender('主案例发生交互'));evidenceRender('等待采样');
</script>
</body>
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