夜花园互动粒子场
在夜花园场景中完成互动粒子场：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：
<!doctype html>
<html lang="zh-Hans" dir="ltr">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>夜花园互动粒子场</title>
<style>
:root { --ink:#18332f; --paper:#f4efe4; --accent:#d45f3e; --secondary:#8fc4ad; --line:color-mix(in srgb, var(--ink) 18%, transparent); --shadow:0 24px 60px color-mix(in srgb, var(--ink) 16%, transparent); color-scheme:light; }
* { box-sizing:border-box; }
html { min-width:320px; background:var(--paper); }
body { min-height:100vh; margin:0; overflow-x:hidden; color:var(--ink); font-family:"Kaiti SC",STKaiti,"Songti SC",serif; background:radial-gradient(circle at 12% 18%,color-mix(in srgb,var(--accent) 12%,transparent) 0 1px,transparent 2px),var(--paper);background-size:19px 19px; }
button,input,select,textarea { color:inherit; font:inherit; }
button,[role="button"],input,select,textarea { accent-color:var(--accent); }
button { cursor:pointer; }
button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible { outline:3px solid var(--accent); outline-offset:3px; }
[hidden] { display:none !important; }
@media (max-width:700px) { .mast h1 { line-height:1.08 !important; letter-spacing:-.035em !important; overflow-wrap:anywhere; } }
@media (prefers-reduced-motion:reduce) { *,*::before,*::after { scroll-behavior:auto !important; animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; } }
.page{width:min(980px,calc(100% - 32px));margin:auto;padding:72px 0 92px}.mast{display:grid;grid-template-columns:1fr auto;transform:rotate(-.25deg);gap:32px;align-items:center;margin-bottom:46px}.mast h1{font-family:"Kaiti SC",STKaiti,serif;font-weight:700;font-size:clamp(40px,8vw,84px);letter-spacing:.02em;margin:0;line-height:1.12}.intro{max-width:650px;margin-top:18px;line-height:2}.scenario{padding:12px;border:2px solid var(--accent);color:var(--accent);transform:rotate(3deg)}.eyebrow{display:block;margin-bottom:9px;color:var(--accent);letter-spacing:.18em}.demo{border-radius:2px;transform:rotate(.12deg);box-shadow:0 30px 70px color-mix(in srgb,var(--ink) 18%,transparent);position:relative;min-height:430px;overflow:hidden;padding:clamp(28px,6vw,66px);background:color-mix(in srgb,var(--paper) 92%,#fff)}@media(max-width:700px){.page{width:calc(100% - 20px);padding:28px 0}.mast{grid-template-columns:1fr}.scenario{justify-self:start}.demo{padding:20px}}
.panel{padding:22px;border:1px solid var(--line);background:color-mix(in srgb,#fff 58%,transparent)}.stack{display:grid;gap:15px}.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.action{min-height:44px;padding:10px 17px;border:1px solid var(--ink);border-radius:999px;background:transparent}.action.primary,.action.is-active{color:var(--paper);background:var(--accent)}.muted{opacity:.68}.status{min-height:24px;margin-top:15px;color:var(--accent);font-weight:800}.metric{font-size:clamp(30px,6vw,58px);font-weight:900}.meter{height:9px;overflow:hidden;border-radius:999px;background:color-mix(in srgb,var(--ink) 12%,transparent)}.meter>i{display:block;height:100%;background:var(--accent)}.chip{padding:6px 9px;border:1px solid var(--line);border-radius:999px;font-size:12px}
.composition-gallery{margin:0;padding:clamp(8px,2vw,18px);border:1px solid var(--ink);background:color-mix(in srgb,var(--paper) 78%,transparent)}.gallery-caption{display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;padding:15px 4px 2px;font-size:12px}.gallery-caption::before,.gallery-caption::after{content:"";height:1px;background:var(--line)}.gallery-caption strong{font:800 11px/1.2 ui-monospace,monospace;letter-spacing:.16em;text-transform:uppercase}.composition-gallery .demo{box-shadow:none}.composition-gallery .demo::before{content:"";position:absolute;inset:10px;border:1px dashed color-mix(in srgb,var(--accent) 36%,transparent);pointer-events:none}
.particle-field-lab{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(230px,.6fr);gap:16px}.particle-field-lab canvas{width:100%;height:460px;border:1px solid var(--line);border-radius:22px;background:#07131f;touch-action:none}.particle-controls{display:grid;align-content:center;gap:17px}.particle-controls label{display:grid;grid-template-columns:1fr auto;gap:8px;font-weight:800}.particle-controls input{grid-column:1/-1;width:100%}@media(max-width:760px){.particle-field-lab{grid-template-columns:1fr}.particle-field-lab canvas{height:330px}}.workflow-session{display:grid;gap:14px}.session-command{display:grid;grid-template-columns:1fr auto minmax(170px,.45fr) auto;gap:16px;align-items:end;padding:18px;border-block:4px double var(--ink)}.session-command h2{margin:.2em 0}.session-command output{font:900 clamp(28px,5vw,54px)/1 ui-monospace,monospace}.session-command label{display:grid;grid-template-columns:1fr auto;gap:7px;font-size:12px}.session-command input{grid-column:1/-1;width:100%}#workflowSessionProgress{height:12px;overflow:hidden;border-radius:2px;background:var(--line)}#workflowSessionProgress i{display:block;width:0;height:100%;background:var(--accent)}.session-stage{min-width:0;transition:filter .25s,transform .25s}.session-stage[data-session-phase="running"]{transform:translateY(-3px)}.session-stage[data-session-phase="paused"]{filter:grayscale(.65)}.session-stage[data-session-phase="complete"]{filter:contrast(.78);opacity:.72}.session-log{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start}.session-log ol{display:flex;flex-wrap:wrap;gap:7px;padding:0;margin:0;list-style:none}.session-log li{padding:5px 8px;border:1px solid var(--line);font-size:12px}@media(max-width:900px){.session-stage{order:-1}.session-command{grid-template-columns:1fr auto}.session-command label{grid-column:1/-1}.session-log{grid-template-columns:1fr}}
</style>
</head>
<body data-aesthetic="paper" data-composition="gallery-frame">
<main class="page">
<header class="mast"><div><span class="eyebrow">paper / 互动粒子场 / INTERMEDIATE</span><h1>夜花园互动粒子场</h1><p class="intro">在夜花园场景中完成互动粒子场：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">夜花园</span></header>
<figure class="composition-gallery"><section class="demo" aria-label="夜花园互动粒子场交互区域"><div class="workflow-session"><header class="session-command"><div><span class="eyebrow">夜花园 SESSION</span><h2>花园观测计时台</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">开始观测</button></header><div id="workflowSessionProgress" role="progressbar" aria-label="花园观测进度" 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:creative-effects-particle-field --><div class="particle-field-lab"><canvas id="particleCanvas" width="960" height="480" tabindex="0" aria-label="夜花园互动粒子场；移动指针或使用方向键吸引粒子" aria-describedby="particleHelp">当前浏览器不支持 Canvas。</canvas><aside class="particle-controls panel"><span class="eyebrow">PARTICLE FIELD</span><h2>互动粒子场</h2><p id="particleHelp" class="muted">在画布中移动指针，或聚焦画布后使用方向键移动吸引点。</p><label>粒子数量 <input id="particleAmount" type="range" min="24" max="110" value="64" data-core-bridge="creative-effects-particle-field"><output id="particleAmountValue">64</output></label><label>吸引强度 <input id="particlePull" type="range" min="0" max="100" value="45"><output id="particlePullValue">45%</output></label><div class="row"><button id="particleReset" class="action primary" type="button">重置粒子</button><button id="particlePause" class="action" type="button" aria-pressed="false">暂停</button></div></aside></div><!-- 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><figcaption class="gallery-caption"><strong>夜花园 / GALLERY 03</strong></figcaption></figure>
</main>
<script>
'use strict';
const statusOutput = document.querySelector('#status');
const announce = message => { statusOutput.textContent = message; };
/* 11DZ_CORE_SCRIPT_START:creative-effects-particle-field */
const particleCanvas=document.querySelector('#particleCanvas');const particleContext=particleCanvas.getContext('2d');const particleAmount=document.querySelector('#particleAmount');const particlePull=document.querySelector('#particlePull');const particleReduced=matchMedia('(prefers-reduced-motion: reduce)').matches;let particlePaused=particleReduced;let particleList=[];let particleTarget={x:0,y:0,active:false};let particleFrame=0;function sizeParticleCanvas(){const rect=particleCanvas.getBoundingClientRect();const ratio=Math.min(2,devicePixelRatio||1);particleCanvas.width=Math.max(320,Math.round(rect.width*ratio));particleCanvas.height=Math.max(260,Math.round(rect.height*ratio));particleContext.setTransform(ratio,0,0,ratio,0,0);if(!particleTarget.active){particleTarget.x=rect.width/2;particleTarget.y=rect.height/2;}}function resetParticles(){cancelAnimationFrame(particleFrame);const rect=particleCanvas.getBoundingClientRect();particleList=Array.from({length:Number(particleAmount.value)},(_,index)=>({x:(index*83%997)/997*rect.width,y:(index*47%509)/509*rect.height,vx:Math.sin(index*2.17)*.45,vy:Math.cos(index*1.73)*.45,r:1.5+index%4}));document.querySelector('#particleAmountValue').textContent=particleAmount.value;drawParticleField();announce('粒子场已重置，共 '+particleList.length+' 个粒子');}function drawParticleField(){const rect=particleCanvas.getBoundingClientRect();particleContext.clearRect(0,0,rect.width,rect.height);particleContext.fillStyle='#07131f';particleContext.fillRect(0,0,rect.width,rect.height);const force=Number(particlePull.value)/17000;particleList.forEach((particle,index)=>{if(!particlePaused){if(particleTarget.active){const dx=particleTarget.x-particle.x;const dy=particleTarget.y-particle.y;const distance=Math.max(30,Math.hypot(dx,dy));particle.vx+=dx/distance*force*distance;particle.vy+=dy/distance*force*distance;}particle.vx*=.992;particle.vy*=.992;particle.x+=particle.vx;particle.y+=particle.vy;if(particle.x<0||particle.x>rect.width)particle.vx*=-1;if(particle.y<0||particle.y>rect.height)particle.vy*=-1;particle.x=Math.max(0,Math.min(rect.width,particle.x));particle.y=Math.max(0,Math.min(rect.height,particle.y));}particleContext.beginPath();particleContext.fillStyle=index%3?'#67e8f9':'#ff8a65';particleContext.arc(particle.x,particle.y,particle.r,0,Math.PI*2);particleContext.fill();particleList.slice(index+1,index+7).forEach(other=>{const distance=Math.hypot(other.x-particle.x,other.y-particle.y);if(distance<72){particleContext.beginPath();particleContext.strokeStyle='rgba(103,232,249,'+(1-distance/72)*.22+')';particleContext.moveTo(particle.x,particle.y);particleContext.lineTo(other.x,other.y);particleContext.stroke();}});});if(!particlePaused)particleFrame=requestAnimationFrame(drawParticleField);}function moveParticleTarget(clientX,clientY){const rect=particleCanvas.getBoundingClientRect();particleTarget={x:clientX-rect.left,y:clientY-rect.top,active:true};}particleCanvas.addEventListener('pointermove',event=>moveParticleTarget(event.clientX,event.clientY));particleCanvas.addEventListener('pointerleave',()=>{particleTarget.active=false;});particleCanvas.addEventListener('keydown',event=>{if(!['ArrowLeft','ArrowRight','ArrowUp','ArrowDown'].includes(event.key))return;event.preventDefault();particleTarget.active=true;particleTarget.x+=event.key==='ArrowRight'?18:event.key==='ArrowLeft'?-18:0;particleTarget.y+=event.key==='ArrowDown'?18:event.key==='ArrowUp'?-18:0;particleTarget.x=Math.max(0,Math.min(particleCanvas.clientWidth,particleTarget.x));particleTarget.y=Math.max(0,Math.min(particleCanvas.clientHeight,particleTarget.y));drawParticleField();});particleAmount.addEventListener('input',resetParticles);particlePull.addEventListener('input',()=>{document.querySelector('#particlePullValue').textContent=particlePull.value+'%';announce('粒子吸引强度 '+particlePull.value+'%');});document.querySelector('#particleReset').addEventListener('click',resetParticles);document.querySelector('#particlePause').addEventListener('click',event=>{particlePaused=!particlePaused;event.currentTarget.textContent=particlePaused?'继续':'暂停';event.currentTarget.setAttribute('aria-pressed',String(particlePaused));cancelAnimationFrame(particleFrame);drawParticleField();announce(particlePaused?'粒子场已暂停':'粒子场继续运动');});addEventListener('resize',()=>{sizeParticleCanvas();resetParticles();},{passive:true});sizeParticleCanvas();resetParticles();
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"creative-effects-particle-field","selector":"[data-core-bridge=\"creative-effects-particle-field\"]","mode":"range","key":"ArrowRight"};const workflowBridgeCore=document.querySelector('#workflowCore');const workflowBridgeControl=workflowBridgeCore.querySelector(workflowBridgeSpec.selector);if(!workflowBridgeControl)throw new Error('Missing core bridge: '+workflowBridgeSpec.name);const workflowBridgeControlledId=workflowBridgeControl.getAttribute('aria-controls');const workflowBridgeControlled=workflowBridgeControlledId?document.getElementById(workflowBridgeControlledId):null;workflowBridgeCore.dataset.workflowBridge=workflowBridgeSpec.name;workflowBridgeCore.dataset.workflowVersion='0';function workflowBridgeSerialize(){const visualNode=workflowBridgeCore.firstElementChild||workflowBridgeCore;const visual=getComputedStyle(visualNode);const outputs=[...workflowBridgeCore.querySelectorAll('output,[role="status"],[aria-live],meter,progress')].map(node=>node.textContent.trim()+'|'+node.getAttribute('aria-valuenow')+'|'+node.getAttribute('value'));const canvas=[...workflowBridgeCore.querySelectorAll('canvas')].map(node=>{try{return node.toDataURL().slice(-160);}catch{return 'canvas-unavailable';}});return JSON.stringify({html:workflowBridgeCore.innerHTML,status:statusOutput.textContent,outputs,canvas,visual:[visual.display,visual.visibility,visual.opacity,visual.transform,visual.filter,visual.backgroundColor,visual.width,visual.height],scroll:workflowBridgeSpec.mode==='scroll'?workflowBridgeControl.scrollTop:null});}let workflowBridgeLastEffect=workflowBridgeSerialize();function workflowBridgeSummary(){const label=(workflowBridgeControl.getAttribute('aria-label')||workflowBridgeControl.textContent||workflowBridgeControl.value||workflowBridgeSpec.name).trim().replace(/\s+/g,' ').slice(0,72);return label+' · 核心版本 '+workflowBridgeCore.dataset.workflowVersion;}function workflowBridgeCommit(){const effect=workflowBridgeSerialize();if(effect===workflowBridgeLastEffect)return {changed:false,summary:workflowBridgeSummary()};workflowBridgeLastEffect=effect;workflowBridgeCore.dataset.workflowVersion=String(Number(workflowBridgeCore.dataset.workflowVersion||0)+1);return {changed:true,summary:workflowBridgeSummary()};}function workflowBridgeScheduleCommit(){queueMicrotask(workflowBridgeCommit);setTimeout(workflowBridgeCommit,0);}workflowBridgeControl.addEventListener("input",workflowBridgeScheduleCommit);workflowBridgeControl.addEventListener('change',workflowBridgeScheduleCommit);const workflowBridgeStateTargets=new Set(workflowBridgeCore.querySelectorAll('dialog'));if(workflowBridgeControlled&&workflowBridgeCore.contains(workflowBridgeControlled))workflowBridgeStateTargets.add(workflowBridgeControlled);workflowBridgeStateTargets.forEach(target=>['close','cancel','toggle'].forEach(eventName=>target.addEventListener(eventName,workflowBridgeScheduleCommit)));function workflowBridgeActivate(){workflowBridgeControl.focus();const step=Number(workflowBridgeControl.step)||1;const min=workflowBridgeControl.min===''?-Infinity:Number(workflowBridgeControl.min);const max=workflowBridgeControl.max===''?Infinity:Number(workflowBridgeControl.max);let next=Math.min(max,Math.max(min,(Number(workflowBridgeControl.value)||0)+step));if(next===Number(workflowBridgeControl.value))next=Math.max(min,Number(workflowBridgeControl.value)-step);workflowBridgeControl.value=String(next);workflowBridgeControl.dispatchEvent(new Event('input',{bubbles:true}));workflowBridgeControl.dispatchEvent(new Event('change',{bubbles:true}));const result=workflowBridgeCommit();setTimeout(workflowBridgeCommit,0);return result;}function workflowBridgeReset(){workflowBridgeCore.dataset.workflowVersion='0';workflowBridgeLastEffect=workflowBridgeSerialize();}
const workflowSessionCore=document.querySelector('#workflowCore');const workflowSessionToggle=document.querySelector('#workflowSessionToggle');const workflowSessionLength=document.querySelector('#workflowSessionLength');const workflowSessionState={phase:'ready',elapsed:0,limit:Number(workflowSessionLength.value),checkpoints:[],timer:null};function workflowSessionFormat(seconds){return String(Math.floor(seconds/60)).padStart(2,'0')+':'+String(seconds%60).padStart(2,'0');}function workflowSessionDrive(){const percent=Math.min(100,Math.round(workflowSessionState.elapsed/workflowSessionState.limit*100));document.querySelector('#workflowSessionClock').textContent=workflowSessionFormat(Math.max(0,workflowSessionState.limit-workflowSessionState.elapsed));const progress=document.querySelector('#workflowSessionProgress');progress.setAttribute('aria-valuenow',String(percent));progress.querySelector('i').style.width=percent+'%';workflowSessionCore.dataset.sessionPhase=workflowSessionState.phase;document.querySelector('#workflowSessionScore').textContent=workflowSessionState.checkpoints.length+' 个交互检查点';}function workflowSessionLap(label){workflowSessionState.checkpoints.push({label,at:workflowSessionState.elapsed});const item=document.createElement('li');item.textContent=label+' · '+workflowSessionFormat(workflowSessionState.elapsed);document.querySelector('#workflowSessionLaps').append(item);workflowSessionDrive();}function workflowSessionStop(complete=false){clearInterval(workflowSessionState.timer);workflowSessionState.timer=null;workflowSessionState.phase=complete?'complete':'paused';workflowSessionToggle.textContent=complete?'重新开始':'继续回合';workflowSessionToggle.setAttribute('aria-pressed','false');workflowSessionDrive();announce(complete?'花园观测回合完成':'回合已暂停');}function workflowSessionStart(){if(workflowSessionState.phase==='complete'){workflowSessionState.elapsed=0;workflowSessionState.checkpoints=[];document.querySelector('#workflowSessionLaps').replaceChildren();}workflowSessionState.phase='running';workflowSessionToggle.textContent='暂停回合';workflowSessionToggle.setAttribute('aria-pressed','true');const bridge=workflowBridgeActivate();workflowSessionLap(bridge.summary);clearInterval(workflowSessionState.timer);workflowSessionState.timer=setInterval(()=>{workflowSessionState.elapsed+=1;if(workflowSessionState.elapsed>=workflowSessionState.limit){workflowSessionStop(true);return;}workflowSessionDrive();},1000);workflowSessionDrive();announce('花园观测回合已开始 · '+bridge.summary);}workflowSessionToggle.addEventListener('click',()=>workflowSessionState.phase==='running'?workflowSessionStop():workflowSessionStart());workflowSessionLength.addEventListener('input',()=>{workflowSessionState.limit=Number(workflowSessionLength.value);workflowSessionState.elapsed=Math.min(workflowSessionState.elapsed,workflowSessionState.limit);workflowSessionDrive();});workflowSessionCore.addEventListener('keydown',event=>{if(event.key==='Enter'||event.key===' '){workflowSessionLap('键盘操作');}});workflowSessionCore.addEventListener('click',event=>{if(event.target.closest('[data-core-bridge]'))workflowSessionLap('核心操作 · '+workflowBridgeSummary());});document.addEventListener('visibilitychange',()=>{if(document.hidden&&workflowSessionState.phase==='running')workflowSessionStop();});workflowSessionDrive();
workflowBridgeReset();
</script>
</body>
</html>