:root{font-family:system-ui,"Microsoft YaHei",sans-serif;color:#13233b;background:#f4f7fb;line-height:1.7}*{box-sizing:border-box}body{margin:0}header,footer{background:#10223b;color:#fff;padding:16px max(5vw,calc((100vw - 960px)/2))}header a,footer a{color:inherit}main{max-width:960px;margin:auto;padding:24px 18px 48px}.hero{background:#12355a;color:white;border-radius:24px;padding:clamp(24px,6vw,64px);margin-bottom:22px}.hero p{color:#d8e7fa}h1{font-size:clamp(30px,6vw,52px);line-height:1.2;margin:10px 0}article{background:white;padding:clamp(18px,4vw,36px);border-radius:20px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px}.grid a{padding:16px;background:#ecf4ff;border-radius:12px;text-decoration:none;color:#133d67}.grid span{display:block;margin-top:5px}summary{cursor:pointer}a:focus-visible,summary:focus-visible{outline:3px solid #ff9a36;outline-offset:3px}