DSFR 设计系统.

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<!doctype html><html lang="en"><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Accordion structure laboratory</title><style>*{box-sizing:border-box}body{margin:0;font:16px/1.6 Arial,sans-serif;color:#28251f;background:#faf9f6}main{max-width:54rem;margin:auto;padding:32px 24px}.notice{background:#eee9df;border-left:4px solid #6b573d;padding:16px}h1{font:700 32px/1.3 Georgia,serif;margin:24px 0}h2{font-size:18px;margin:0}.mode{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:24px 0}select{font:inherit;padding:10px;background:white;border:1px solid #777}section{border-bottom:1px solid #aaa18f}.trigger{font:700 18px/1.5 Arial,sans-serif;border:0;background:transparent;color:inherit;display:flex;justify-content:space-between;gap:16px;text-align:start;padding:20px 8px;width:100%;cursor:pointer}.trigger::after{content:'+'}.trigger[aria-expanded=true]::after{content:'−'}.panel{padding:0 24px 24px}.panel p{margin-top:0}:focus-visible{outline:3px solid #6b573d;outline-offset:3px}#state{font-size:14px;background:#eee9df;padding:12px;margin-top:24px}small{display:block;margin-top:24px;color:#625a4e;font-size:14px}[hidden]{display:none!important}@media(max-width:600px){main{padding:24px 16px}h1{font-size:28px}.panel{padding-inline:8px}}</style><main><div class="notice">Neutral interaction study · No DSFR visual identity or assets</div><h1>Prepare for a community workshop</h1><p>The purpose and main instruction stay visible: arrive with your booking note. Optional supporting details can be opened below.</p><div class="mode"><label for="mode">Panel behaviour</label><select id="mode"><option value="independent">Independent: compare sections</option><option value="linked">Linked: one section at a time</option></select></div><div id="group"><section><h2><button type="button" class="trigger" aria-expanded="false" aria-controls="access">Room access</button></h2><div class="panel" id="access" hidden><p>The fictional workshop room is reached from the courtyard. The step-free entrance is on the same level as the activity room.</p><p>Ask the example welcome desk for assistance if the courtyard route is unavailable. These are demonstration instructions, not a real venue guide.</p></div></section><section><h2><button type="button" class="trigger" aria-expanded="false" aria-controls="equipment">Equipment to bring</button></h2><div class="panel" id="equipment" hidden><p>The example workshop uses simple paper materials. Bring the following if convenient:</p><ul><li>A notebook for your own observations.</li><li>A pencil or pen you can use comfortably.</li><li>Your fictional booking reference.</li></ul></div></section><section><h2><button type="button" class="trigger" aria-expanded="false" aria-controls="arrival">What happens on arrival</button></h2><div class="panel" id="arrival" hidden><p>The example facilitator explains the activity before participants choose a seat. No personal information is collected by this demonstration.</p><p>Keep this panel open with the equipment list to compare the two instructions in independent mode.</p></div></section></div><p id="state" role="status">Open sections: none</p><small>Original OpenDesign educational specimen. DSFR documentation informs the structural comparison; this is not a government service or native DSFR rendering.</small></main><script>const buttons=[...document.querySelectorAll('.trigger')],mode=document.querySelector('#mode');function set(b,open){b.setAttribute('aria-expanded',String(open));document.getElementById(b.getAttribute('aria-controls')).hidden=!open}function announce(){const names=buttons.filter(b=>b.getAttribute('aria-expanded')==='true').map(b=>b.textContent);document.querySelector('#state').textContent='Open sections: '+(names.join(', ')||'none')}buttons.forEach(b=>b.onclick=()=>{const open=b.getAttribute('aria-expanded')!=='true';if(open&&mode.value==='linked')buttons.forEach(x=>set(x,false));set(b,open);announce()});mode.onchange=()=>{if(mode.value==='linked'){let retained=false;buttons.forEach(b=>{if(b.getAttribute('aria-expanded')==='true'){if(retained)set(b,false);retained=true}})}announce()};</script></html>