:root {
  color: #0f1f3d;
  background: #f4f6f9;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 50% 0, rgba(30, 88, 207, 0.09), transparent 36rem),
    #f4f6f9;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 420px);
  padding: 38px;
  border: 1px solid #d9e0eb;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 18px 50px rgba(28, 48, 82, 0.09);
}

.brand-mark {
  display: block;
  width: 42px;
  height: 42px;
  margin-bottom: 24px;
  object-fit: contain;
}

.login-heading p,
.login-heading h1,
.login-heading span,
.security-note,
.login-message { margin: 0; }

.login-heading p {
  color: #56647a;
  font-size: 14px;
  font-weight: 700;
}

.login-heading h1 {
  margin-top: 9px;
  font-size: 29px;
  line-height: 1.25;
}

.login-heading span {
  display: block;
  margin-top: 10px;
  color: #718096;
  font-size: 14px;
  line-height: 1.7;
}

.login-form { margin-top: 28px; }

.login-form label > span {
  display: block;
  margin-bottom: 8px;
  color: #36445b;
  font-size: 14px;
  font-weight: 700;
}

.login-form input[type="password"] {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  outline: none;
  color: #10213d;
  background: #fff;
  font: inherit;
}

.login-form input[type="password"]:focus {
  border-color: #1757cf;
  box-shadow: 0 0 0 3px rgba(23, 87, 207, 0.12);
}

.login-message {
  min-height: 20px;
  margin-top: 10px;
  color: #c7352d;
  font-size: 13px;
}

.login-form button {
  width: 100%;
  height: 48px;
  margin-top: 8px;
  border: 0;
  border-radius: 10px;
  color: #fff;
  background: #1757cf;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.login-form button:hover { background: #1048b1; }

.security-note {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid #e8edf3;
  color: #7c889a;
  font-size: 12px;
  line-height: 1.65;
}

@media (max-width: 520px) {
  .login-shell { padding: 14px; }
  .login-card { padding: 28px 22px; border-radius: 14px; }
  .login-heading h1 { font-size: 25px; }
}
.register-link{display:block;text-align:center;color:#176b5b;text-decoration:none;font-weight:700;margin-top:4px}.register-link:hover{text-decoration:underline}