*{box-sizing:border-box}body{margin:0;font-family:-apple-system,"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;font-size:17px;line-height:1.75;color:#1f2933;background:#f6f8f7}
header{background:#1f7a5c;color:#fff;padding:14px 18px}header a{color:#fff;text-decoration:none}.logo{font-weight:700;font-size:20px}nav{margin-top:4px;font-size:15px}nav a{margin-right:16px;opacity:.9}
main{max-width:720px;margin:0 auto;padding:18px}h1{font-size:24px;line-height:1.4;margin:.3em 0}h2{font-size:19px;margin-top:1.6em;border-left:4px solid #1f7a5c;padding-left:10px}h3{font-size:17px;margin-bottom:.2em}
.meta{color:#6b7780;font-size:14px}.card{background:#fff;border-radius:12px;padding:14px 16px;margin:14px 0;box-shadow:0 1px 3px rgba(0,0,0,.06)}.card a{color:#1f7a5c;font-weight:600;text-decoration:none}
.tip{background:#fff8e6;border-left:4px solid #e0a400;padding:10px 14px;border-radius:6px;margin:12px 0;font-size:16px}code{background:#eef2f0;padding:1px 5px;border-radius:4px}
ol,ul{padding-left:1.3em}li{margin:.3em 0}.src{font-size:14px;color:#56636b;word-break:break-all}
footer{background:#183f33;color:#e6f2ed;text-align:center;padding:20px 16px;margin-top:30px;font-size:15px}footer .cta{font-size:18px;font-weight:700;color:#fff;margin:6px 0}footer small{opacity:.7}