/* 管理后台登录页 */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: #0b1f33;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(35, 110, 180, .55), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(24, 95, 165, .38), transparent 45%),
    linear-gradient(135deg, #071523 0%, #0d2a45 55%, #14395c 100%);
  padding: 24px;
}

.login-card {
  width: 420px;
  max-width: 100%;
  background: #fff;
  border-radius: 16px;
  padding: 42px 40px 36px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .35);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.login-brand .logo-dot {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, #185fa5, #3f8fd8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
}
.login-brand h1 { font-size: 21px; color: #16324f; font-weight: 700; letter-spacing: .5px; }
.login-sub { font-size: 13px; color: #8a95a5; margin-bottom: 30px; }

.login-field { margin-bottom: 18px; }
.login-field label { display: block; font-size: 13px; color: #4c5a6b; margin-bottom: 7px; }
.login-field input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #dfe4ea;
  border-radius: 9px;
  font-size: 14px;
  color: #1c2a39;
  outline: none;
  transition: all .18s;
  font-family: inherit;
}
.login-field input:focus {
  border-color: #185fa5;
  box-shadow: 0 0 0 3px rgba(24, 95, 165, .1);
}

.login-btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 9px;
  background: #185fa5;
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  margin-top: 8px;
  transition: background .18s;
  font-family: inherit;
}
.login-btn:hover { background: #0c447c; }
.login-btn:disabled { opacity: .65; cursor: not-allowed; }

.login-error {
  min-height: 20px;
  font-size: 13px;
  color: #d0342c;
  margin-top: 12px;
}
.login-hint {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid #eef1f5;
  font-size: 12px;
  color: #98a2b3;
  line-height: 1.8;
}
.login-hint b { color: #5a6675; font-weight: 600; }
.login-back {
  display: block;
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  color: #7b8794;
  text-decoration: none;
}
.login-back:hover { color: #185fa5; }