*{box-sizing:border-box}body{margin:0;background:#f5f3ee;color:#173448;font:17px/1.65 system-ui,sans-serif}header,footer{background:#102e46;color:#fff;padding:22px max(18px,5vw)}header{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap}header a,footer a{color:#fff}.brand{display:flex;align-items:center;gap:12px;font-weight:750;text-decoration:none}.brand img{width:52px;height:52px;object-fit:contain}.brand small{display:block;font-size:13px;font-weight:400}main{max-width:880px;margin:auto;padding:28px 18px}h1{font-size:clamp(30px,6vw,46px);line-height:1.2}h2{font-size:25px}.tag{font-size:14px;font-weight:750;color:#725013}.intro{font-size:22px}section,details{margin:24px 0;background:#fff;border:1px solid #d3dde1;border-radius:12px;padding:20px}details details{margin:16px 0}summary{cursor:pointer;min-height:44px;font-weight:700}a{color:#164765;text-underline-offset:3px;overflow-wrap:anywhere}li{margin:15px 0;padding-left:4px}li a{display:inline-block;padding:5px 0;min-height:44px}small{display:block;color:inherit;font-size:14px}input{display:block;width:100%;min-height:48px;padding:12px;border:1px solid #7e939f;border-radius:8px;font:inherit}.join{display:inline-block;padding:12px 20px;background:#153959;color:#fff;border-radius:8px;font-weight:700}a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #c99b38;outline-offset:3px}[hidden]{display:none!important}@media(max-width:420px){section,details{padding:14px}ul,ol{padding-left:22px}}