:root{font-family:system-ui,"Microsoft JhengHei",sans-serif;color:#152e34;background:#f6f8f5;line-height:1.8}*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:940px;margin:auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dce4dd}a{color:#246052;text-underline-offset:4px}nav{display:flex;gap:20px;flex-wrap:wrap}.brand{font-weight:800;text-decoration:none}h1{font-size:clamp(30px,5vw,48px);line-height:1.3}h2{margin-top:36px;font-size:23px}p,li{max-width:78ch}.eyebrow{color:#4a7165;font-size:14px}.lead{font-size:21px}section{background:white;border:1px solid #dce4dd;border-radius:16px;padding:20px 28px;margin:20px 0}.platforms{display:flex;gap:12px;flex-wrap:wrap}.platforms span{background:#e7f1eb;padding:6px 16px;border-radius:24px}footer{font-size:14px;border-top:1px solid #dce4dd;margin-top:48px}.notice{border-left:4px solid #246052;padding-left:20px}@media(max-width:600px){header{display:block}nav{margin-top:12px;gap:14px}section{padding:16px}main{padding:20px}}