* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #e8f0fe 0%, #f3e8fd 100%);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  padding: 20px;
}

.login-card {
  width: 100%; max-width: 400px;
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(60, 80, 140, 0.12);
  padding: 44px 36px;
}

.login-header {
  text-align: center; margin-bottom: 32px;
}

.login-logo {
  width: 60px; height: 60px; border-radius: 16px;
  background: linear-gradient(135deg, #007aff, #5856d6);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(0,122,255,0.25);
}

.login-logo svg { width: 28px; height: 28px; color: #fff; }

.login-title { font-size: 22px; font-weight: 600; color: #1d1d1f; margin-bottom: 6px; }
.login-subtitle { font-size: 14px; color: #888; }

.login-form { }

.form-group { margin-bottom: 18px; }

.form-label {
  display: block; font-size: 13px; font-weight: 500;
  color: #555; margin-bottom: 6px;
}

.form-input {
  width: 100%; height: 46px;
  background: #f8f9fa;
  border: 1px solid #e8eaed;
  border-radius: 10px;
  padding: 0 14px; font-size: 15px; color: #333;
  outline: none;
}

.form-input:focus {
  border-color: #007aff;
  box-shadow: 0 0 0 3px rgba(0,122,255,0.08);
}

.form-input::placeholder { color: #bbb; }

.btn-login {
  width: 100%; height: 46px;
  background: linear-gradient(135deg, #007aff, #5856d6);
  color: #fff; border: none; border-radius: 10px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,122,255,0.25);
  margin-top: 6px;
}

.btn-login:hover {
  opacity: 0.92;
}

.btn-login:active {
  opacity: 0.85;
}

.error-msg {
  background: #fff2f0; color: #ff4d4f;
  padding: 10px 14px; border-radius: 8px;
  font-size: 13px; margin-bottom: 16px;
  border: 1px solid #ffccc7;
}

.login-footer {
  margin-top: 24px; text-align: center;
  font-size: 12px; color: #aaa;
}

/* 移动端适配 */
@media (max-width: 480px) {
  body { padding: 16px; }
  .login-card {
    padding: 32px 24px;
    border-radius: 16px;
    max-width: 100%;
  }
  .login-logo {
    width: 52px; height: 52px; border-radius: 14px;
    margin-bottom: 14px;
  }
  .login-logo svg { width: 24px; height: 24px; }
  .login-title { font-size: 20px; }
  .form-input { height: 44px; font-size: 14px; }
  .btn-login { height: 44px; font-size: 15px; }
}