:root { font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: #1c2430; background: #f4f6f8; }
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; min-height: 100vh; }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: radial-gradient(circle at 50% 0%, #eaf2fb 0, #f4f6f8 48%, #eef1f4 100%); }
.login-card { width: min(100%, 390px); padding: 34px 34px 28px; border: 1px solid #dfe4e9; border-radius: 8px; background: #fff; box-shadow: 0 18px 55px rgba(28, 36, 48, .12); }
.login-mark { width: 46px; height: 46px; display: flex; align-items: flex-end; justify-content: center; gap: 4px; padding: 11px; border-radius: 7px; background: #1c2430; }
.login-mark span { width: 5px; border-radius: 2px; background: #fff; }
.login-mark span:nth-child(1) { height: 9px; opacity: .55; }.login-mark span:nth-child(2) { height: 16px; opacity: .75; }.login-mark span:nth-child(3) { height: 24px; }
.login-kicker { margin: 26px 0 8px; color: #2463a8; font: 600 10px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .08em; }
.login-card h1 { margin: 0; font-size: 25px; line-height: 1.2; }
.login-subtitle { margin: 9px 0 28px; color: #657180; font-size: 13px; }
.login-card label { display: block; margin-bottom: 7px; color: #657180; font-size: 12px; font-weight: 600; }
.login-card input { width: 100%; height: 44px; padding: 0 12px; border: 1px solid #cbd2d9; border-radius: 5px; outline: none; color: #1c2430; font-size: 14px; }
.login-card input:focus { border-color: #2463a8; box-shadow: 0 0 0 3px rgba(36, 99, 168, .12); }
.login-card button { width: 100%; height: 44px; margin-top: 14px; border: 0; border-radius: 5px; color: #fff; background: #2463a8; font-weight: 700; cursor: pointer; }
.login-card button:hover { background: #1f5794; }.login-card button:disabled { opacity: .65; cursor: wait; }
.login-error { min-height: 18px; margin: 11px 0 0; color: #c53b3b; font-size: 12px; }
.login-footnote { margin: 25px 0 0; color: #919ba7; font-size: 11px; text-align: center; }
@media (max-width: 480px) { .login-shell { padding: 14px; }.login-card { padding: 28px 22px 22px; } }