:root{--ink:#17223b;--muted:#65728a;--line:#dbe4f2;--canvas:#f3f7fc;--accent:#2563eb;--accent-dark:#1d4ed8}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 18% 8%,#dceafe 0,transparent 36%),var(--canvas);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}.login-shell{width:min(100%,440px)}.login-card{padding:40px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 22px 52px #255fba1c}.eyebrow{margin:0 0 10px;color:var(--accent);font-size:12px;font-weight:780;letter-spacing:.12em}h1{margin:0;font-size:32px;line-height:1.2;letter-spacing:-.04em}p{margin:12px 0 0;color:var(--muted);font-size:14px;line-height:1.7}form{display:grid;gap:14px;margin-top:30px}label{display:grid;gap:8px;color:#3e4d67;font-size:13px;font-weight:650}input{width:100%;min-height:46px;border:1px solid var(--line);border-radius:9px;padding:0 12px;color:var(--ink);font:inherit;outline:none}input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #2563eb1a}button{min-height:46px;border:0;border-radius:9px;background:var(--accent);color:#fff;font:inherit;font-weight:700;cursor:pointer;box-shadow:0 6px 14px #2563eb30}button:hover{background:var(--accent-dark)}button:disabled{opacity:.55;cursor:wait}.form-message{min-height:22px;margin:0;color:#a13f34;font-size:12px}@media(max-width:420px){body{padding:16px}.login-card{padding:30px 24px}h1{font-size:28px}}