课堂札记首字下沉版式
在课堂札记场景中完成首字下沉版式：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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<title>课堂札记首字下沉版式</title>
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<main class="page">
<header class="mast"><div><span class="eyebrow">magazine / 首字下沉版式 / INTERMEDIATE</span><h1>课堂札记首字下沉版式</h1><p class="intro">在课堂札记场景中完成首字下沉版式：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">课堂札记</span></header>
<div class="composition-studio"><div class="studio-ruler" aria-hidden="true"></div><section class="demo" aria-label="课堂札记首字下沉版式交互区域"><div id="workflowSpatial" class="workflow-spatial" style="--spatial-width:64%;--spatial-zoom:1"><header><div><span class="eyebrow">课堂札记 SPATIAL CANVAS</span><h2>课堂札记调整台</h2></div><label>阅读长度占比<input id="workflowSpatialWidth" type="range" min="38" max="82" value="64"><output id="workflowSpatialWidthValue">64%</output></label><label>内容缩放<input id="workflowSpatialZoom" type="range" min="80" max="120" value="100"><output id="workflowSpatialZoomValue">100%</output></label></header><div class="spatial-grid"><section id="workflowCore" class="workflow-core spatial-core"><!-- 11DZ_CORE_START:typography-text-drop-cap --><div class="drop-cap-lab"><aside class="drop-cap-controls panel"><span class="eyebrow">DROP CAP</span><h2>首字下沉版式</h2><label>下沉行数 <input id="dropRows" type="range" min="2" max="6" value="4" data-core-bridge="typography-text-drop-cap"><output id="dropRowsValue">4 行</output></label><div class="row" role="group" aria-label="首字样式"><button class="action drop-style is-active" type="button" data-drop-style="solid" aria-pressed="true">实心</button><button class="action drop-style" type="button" data-drop-style="outline" aria-pressed="false">描边</button></div></aside><article id="dropArticle" class="drop-article"><span>课堂札记 · EDITORIAL</span><h3>从第一个字开始建立阅读节奏</h3><p>风从街角穿过，带来纸张与树叶的声音。首字下沉把开篇变成视觉锚点，让读者自然进入故事，同时不破坏段落本身的语义顺序。</p><p>在窄屏上，版式会收紧边距，但首字仍与正文基线保持清楚的关系。</p></article></div><!-- 11DZ_CORE_END --></section><input id="workflowSpatialHandle" class="spatial-handle" type="button" value="↔" aria-label="拖动调整主案例预览宽度"><aside><strong>课堂札记版式调整</strong><p>课堂札记重点强调与课堂札记阅读完成会随画布尺寸重新编排。</p><output id="workflowSpatialStatus">宽度 64%，缩放 100%</output><input id="workflowSpatialApply" class="action primary" type="button" value="应用版面"></aside></div></div><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
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