阅读模式数值步进器
在阅读模式场景中完成数值步进器：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>阅读模式数值步进器</title>
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<main class="page">
<header class="mast"><div><span class="eyebrow">playful / 数值步进器 / BEGINNER</span><h1>阅读模式数值步进器</h1><p class="intro">在阅读模式场景中完成数值步进器：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">阅读模式</span></header>
<div class="composition-split"><aside class="split-note"><b>CASE 02</b><span>掌握数值步进器的语义结构、响应式编排、键盘操作与状态同步。</span></aside><section class="demo" aria-label="阅读模式数值步进器交互区域"><div class="workflow-session"><header class="session-command"><div><span class="eyebrow">阅读模式 SESSION</span><h2>阅读节奏计时台</h2></div><output id="workflowSessionClock">00:45</output><label>回合时长<input id="workflowSessionLength" type="range" min="15" max="90" step="15" value="45"><span>秒</span></label><button id="workflowSessionToggle" class="action primary" type="button">开始阅读</button></header><div id="workflowSessionProgress" role="progressbar" aria-label="阅读节奏进度" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><i></i></div><section id="workflowCore" class="workflow-core session-stage" data-session-phase="ready" tabindex="-1"><!-- 11DZ_CORE_START:controls-selectors-numeric-stepper --><section class="numeric-stepper-demo"><div><span class="eyebrow">NUMBER STEPPER</span><h2>阅读模式数量</h2><p>按钮、数字输入框和键盘方向键共享同一数值边界。</p></div><div class="stepper-shell"><button id="stepperMinus" type="button" aria-label="减少一个">−</button><label><span class="visually-hidden">数量</span><input id="stepperInput" type="number" min="1" max="12" value="3" inputmode="numeric"></label><button id="stepperPlus" type="button" aria-label="增加一个" data-core-bridge="controls-selectors-numeric-stepper">＋</button></div><div class="stepper-presets" aria-label="快速数量"><button type="button" data-stepper-value="1">1</button><button type="button" data-stepper-value="3">3</button><button type="button" data-stepper-value="6">6</button><button type="button" data-stepper-value="12">12</button></div><output id="stepperTotal">共 3 份 · 还可增加 9 份</output></section><!-- 11DZ_CORE_END --></section><footer class="session-log"><strong id="workflowSessionScore">0 个交互检查点</strong><ol id="workflowSessionLaps" aria-label="回合记录"></ol></footer></div><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
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workflowBridgeReset();
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