:root{font-family:"PingFang SC","Microsoft YaHei",sans-serif;color:#142b20;background:#f6f3e9}*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:760px;margin:auto;padding:24px}header img{max-width:100%;height:auto}nav{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}a{color:#245c40;text-underline-offset:4px}nav a{display:inline-flex;align-items:center;min-height:44px}h1{font-size:clamp(26px,5vw,36px);line-height:1.4}h2{font-size:20px;line-height:1.5}p{line-height:1.9;overflow-wrap:anywhere}.intro{font-size:18px}section{border-top:1px solid #ccd3c7;padding:18px 0}.cta{display:inline-flex;align-items:center;justify-content:center;background:#245c40;color:white;border-radius:28px;padding:12px 22px;min-height:48px;text-decoration:none;margin-top:20px}footer{font-size:14px;color:#516154}a:focus-visible{outline:3px solid #245c40;outline-offset:4px}@media(max-width:400px){header,main,footer{padding:18px}}