:root{--blue:#246bfd;--ink:#172033;--muted:#718096;--line:#e5e9f0}*{box-sizing:border-box}body{margin:0;color:var(--ink);font:16px/1.7 system-ui,"Microsoft YaHei"}a{text-decoration:none;color:inherit}header{height:72px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(22px,calc((100% - 1200px)/2))}.brand{display:flex;gap:10px;align-items:center}.brand i,.grid article>i{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--blue),#0ca678);color:#fff;font-style:normal;font-weight:900}.brand span{display:flex;flex-direction:column}.brand small{color:var(--muted);font-size:11px}nav{display:flex;gap:20px;align-items:center}nav form{display:inline}.btn{border:0;background:var(--blue);color:#fff;padding:10px 20px;border-radius:10px;font-weight:700}.hero{padding:90px max(22px,calc((100% - 1200px)/2));background:linear-gradient(135deg,#eef5ff,#f0fcf7)}.hero>span{color:var(--blue);font-weight:800}.hero h1{font-size:52px;margin:10px 0}.hero em{color:var(--blue);font-style:normal}.hero p{color:var(--muted);font-size:18px}.section{max-width:1200px;margin:auto;padding:65px 22px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid article{border:1px solid var(--line);border-radius:18px;padding:24px}.grid article>i{background:var(--color)}.grid p{color:var(--muted)}.login{min-height:70vh;display:grid;place-items:center;background:#f6f8fb}.login form{width:min(430px,92%);padding:35px;border:1px solid var(--line);border-radius:20px;background:#fff}.login label{display:flex;flex-direction:column;margin:15px 0;font-weight:700}.login input{padding:11px;border:1px solid #dce1e9;border-radius:9px;margin-top:5px}.login .btn{width:100%}footer{text-align:center;padding:35px;border-top:1px solid var(--line);color:var(--muted)}.toast{position:fixed;right:20px;top:85px;background:#d94848;color:#fff;padding:10px 16px;border-radius:9px}@media(max-width:700px){.hero h1{font-size:36px}.grid{grid-template-columns:1fr}nav>a:first-child{display:none}}