Marketing and content scenarios

Course Sprint Launch Countdown Page

Complete the launch countdown page for the course sprint scenario: include real content, interactive controls, clear status feedback, and responsive layouts.

Marketing and content scenariosLaunch countdown pageHTMLCSS AnimationJavaScript
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    <header class="mast"><div><span class="eyebrow">terminal / Launch Countdown Page / INTERMEDIATE</span><h1>Course Sprint Launch Countdown Page</h1><p class="intro">Complete the launch countdown page for the course sprint scenario: include real content, interactive controls, clear status feedback, and responsive layouts.</p></div><span class="scenario">Course sprint</span></header>
    <div class="composition-split"><aside class="split-note"><b>CASE 02</b><span>Learn the semantic structure, responsive layout, keyboard interaction, and state synchronization for a launch countdown page.</span></aside><section class="demo" aria-label="Course Sprint Launch Countdown Page Interaction Area"><div id="similarityShell" class="similarity-shell" data-review-state="focus"><header class="similarity-head"><div><span class="eyebrow">Course Sprint / REVIEW STUDIO</span><h2>Launch countdown page review workbench</h2><p>Place the main case inside a separate review shell, and additionally record the observation mode, checkpoints, and current conclusion.</p></div><output id="similarityState">Ready to start review</output></header><div class="similarity-layout"><aside class="similarity-console"><fieldset class="similarity-modes"><legend>Review perspective</legend><button class="action primary" type="button" data-review-view="focus">Focus on the main view</button><button class="action" type="button" data-review-view="compare">Checklist</button><button class="action" type="button" data-review-view="audit">Record on Site</button></fieldset><label>Observation Density<input id="similarityDensity" type="range" min="84" max="124" value="100"><output id="similarityDensityValue">100%</output></label><label class="similarity-pin"><input id="similarityPin" type="checkbox"> Pin current checkpoint</label><ol id="similarityChecklist" class="similarity-checklist"><li>Course Sprint Collaboration</li><li>Course Sprint Progress</li><li>Course Sprint Reminder</li><li>Course Sprint Collection</li></ol><button id="similarityCapture" class="action primary" type="button">Checkpoint Records</button><ol id="similarityLog" class="similarity-log"><li>Waiting for the first check record</li></ol></aside><section class="similarity-stage"><div id="similarityDeck" class="similarity-deck"><article data-active="true"><span>01</span><strong>Course Sprint Collaboration</strong><p>Check whether the status change is visible</p></article><article><span>02</span><strong>Course Sprint Progress</strong><p>Confirm keyboard and click entry points are consistent</p></article><article><span>03</span><strong>Course Sprint Reminder</strong><p>Check whether the layout falls back on narrow screens</p></article><article><span>04</span><strong>Course Sprint Collection</strong><p>Record current review conclusion</p></article></div><div id="similarityCoreShell" class="similarity-core-shell"><div class="workflow-dispatch"><aside class="dispatch-console"><span class="eyebrow">Course Sprint DISPATCH</span><h2>Course Sprint Command Center</h2><form id="workflowDispatchForm"><label>Task Type<select id="workflowDispatchKind"><option>Course Sprint Highlights</option><option>Supplemental Evidence for the Course Sprint</option><option>Course Sprint Conversion Action</option></select></label><label>Target Audience<input id="workflowDispatchAmount" type="number" min="1" max="9999" value="33"><span>person</span></label><fieldset><legend>Processing priority</legend><label><input type="radio" name="workflowPriority" value="normal" checked>Regular</label><label><input type="radio" name="workflowPriority" value="urgent">Urgent</label></fieldset><button class="action primary" type="submit">Save Page</button></form><label>Current task<select id="workflowDispatchActive" aria-label="Switch current task"><option value="1">Course Sprint Highlights</option><option value="2">Supplemental Evidence for the Course Sprint</option></select></label><output id="workflowDispatchSummary">Waiting for Dispatch</output></aside><section id="workflowCore" class="workflow-core dispatch-workbench" data-dispatch-priority="normal"><!-- 11DZ_CORE_START:marketing-content-pages-launch-countdown --><div class="countdown-launch"><section><span class="eyebrow">LOCAL LAUNCH CLOCK</span><h2>Course Sprint Coming Soon</h2><p>The countdown is calculated entirely using the browser’s local time and does not request server time.</p><button id="restartCountdown" class="action primary" type="button" data-core-bridge="marketing-content-pages-launch-countdown">Reset to 72 Hours</button></section><div class="countdown-units" role="timer" aria-live="off"><span><strong id="countDays">03</strong><small>Day</small></span><span><strong id="countHours">00</strong><small>Time</small></span><span><strong id="countMinutes">00</strong><small>minutes</small></span><span><strong id="countSeconds">00</strong><small>sec</small></span></div></div><!-- 11DZ_CORE_END --></section></div></div></section></div></div><p id="status" class="status" role="status" aria-live="polite"></p></section></div>
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let launchAt=Date.now()+72*60*60*1000;const countdownParts={days:document.querySelector('#countDays'),hours:document.querySelector('#countHours'),minutes:document.querySelector('#countMinutes'),seconds:document.querySelector('#countSeconds')};function renderCountdown(){const left=Math.max(0,launchAt-Date.now());const totalSeconds=Math.floor(left/1000);const values={days:Math.floor(totalSeconds/86400),hours:Math.floor(totalSeconds%86400/3600),minutes:Math.floor(totalSeconds%3600/60),seconds:totalSeconds%60};Object.entries(values).forEach(([key,value])=>{countdownParts[key].textContent=String(value).padStart(2,'0');});if(!left)announce('Course Sprint Is Now Open');}document.querySelector('#restartCountdown').addEventListener('click',()=>{launchAt=Date.now()+72*60*60*1000;renderCountdown();announce('Countdown reset to 72 hours');});renderCountdown();setInterval(renderCountdown,1000);
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workflowBridgeReset();
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