/* CSS自定义属性 */
:root{--primary-bg:#efeeee;--shadow-dark:rgba(0,0,0,.1);--shadow-light:rgba(255,255,255,1);--text-color:slategrey;--button-bg:#f2f2f2;--button-border:#ccc;--transition-speed:.2s}*{margin:0;padding:0;box-sizing:border-box}body{width:100%;height:100vh;display:flex;justify-content:center;align-items:center;background-color:var(--primary-bg);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif}.container{width:min(700px,90vw);height:auto;display:flex;justify-content:space-around;flex-wrap:wrap;align-items:center;gap:20px;padding:20px}.container .box{display:flex;justify-content:center;flex-direction:column;align-items:center;width:100px;height:140px}.container .box .img{width:100px;height:100px;box-shadow:18px 18px 30px var(--shadow-dark),-18px -18px 30px var(--shadow-light);border-radius:20px;display:flex;align-items:center;justify-content:center;background-color:var(--primary-bg);transition:box-shadow var(--transition-speed) ease-out;position:relative;cursor:pointer}.container .box .img img{width:60px;transition:width var(--transition-speed) ease-out}.container .box p{color:var(--text-color);margin-top:10px;font-size:14px;text-align:center}.container .box .img:hover{box-shadow:0 0 0 rgba(0,0,0,.2),0 0 0 rgba(255,255,255,.8),inset 18px 18px 30px var(--shadow-dark),inset -18px -18px 30px var(--shadow-light);transition:box-shadow var(--transition-speed) ease-out}.container .box .img:hover img{width:58px;transition:width var(--transition-speed) ease-out}

#showIframeButton{position:fixed;bottom:10px;right:10px;padding:10px 20px;background-color:var(--button-bg);color:#000;border:1px solid var(--button-border);border-radius:5px;cursor:pointer;box-shadow:0 2px 4px var(--shadow-dark);font-size:14px;transition:all var(--transition-speed) ease}#showIframeButton:hover{background-color:#e8e8e8;transform:translateY(-1px);box-shadow:0 4px 8px var(--shadow-dark)}@media (max-width:768px){.container{width:95vw;gap:15px;padding:15px}.container .box{width:80px;height:120px}.container .box .img{width:80px;height:80px}.container .box .img img{width:48px}.container .box .img:hover img{width:46px}.container .box p{font-size:12px}#showIframeButton{padding:8px 16px;font-size:12px}}