body {
  background: #fff;
  font-family: 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
  margin: 0;
}
.login-container {
  max-width: 420px;
  margin: 32px auto;
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  padding: 32px 24px 40px 24px;
  position: relative;
}
.logo-area {
  text-align: center;
  margin-bottom: 28px;
}
.logo-area img {
  width: 80px;
  margin-bottom: 8px;
}
.logo-area .brand {
  font-size: 30px;
  font-weight: bold;
  letter-spacing: 8px;
  color: #2446f5;
  margin-bottom: 8px;
}
.title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 22px;
  font-weight: bold;
  padding: 18px 0 0 0;
}
.menu-icon {
  width: 28px;
  height: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
}
.menu-icon span {
  display: block;
  height: 3px;
  background: #222;
  border-radius: 2px;
  margin: 3px 0;
}
.form-label {
  font-weight: bold;
  font-size: 16px;
  margin-bottom: 8px;
  margin-top: 18px;
}
.input-group {
  display: flex;
  align-items: center;
  background: #f3f4fa;
  border-radius: 10px;
  padding: 0 12px;
  margin-bottom: 10px;
}
.input-group select,
.input-group input {
  border: none;
  background: transparent;
  font-size: 17px;
  padding: 14px 0;
  outline: none;
  flex: 1;
}
.input-group select {
  width: 80px;
  font-size: 17px;
  color: #222;
  background: transparent;
}
.input-group input::placeholder {
  color: #b7b7b7;
}
.password-group {
  position: relative;
}
.toggle-password {
  cursor: pointer;
  margin-left: 8px;
}
.forgot-link {
  color: #2446f5;
  text-decoration: none;
  font-size: 15px;
  margin-left: 2px;
  margin-bottom: 18px;
  display: inline-block;
}
.login-btn {
  width: 100%;
  background: #2446f5;
  color: #fff;
  font-size: 20px;
  font-weight: bold;
  padding: 16px 0;
  border: none;
  border-radius: 30px;
  letter-spacing: 4px;
  cursor: pointer;
  margin-top: 18px;
}
.register-btn {
  width: 100%;
  background: #fff;
  color: #2446f5;
  font-size: 20px;
  font-weight: bold;
  padding: 16px 0;
  border: 2px solid #2446f5;
  border-radius: 30px;
  letter-spacing: 4px;
  cursor: pointer;
  margin-top: 18px;
}
.loading {
  display: none;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: #444;
  border-radius: 10px;
  padding: 16px 32px;
  z-index: 10;
}
.loading.active {
  display: block;
}
.spinner {
  border: 4px solid #f3f3f3;
  border-top: 4px solid #2446f5;
  border-radius: 50%;
  width: 38px;
  height: 38px;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
@media (max-width: 600px) {
  .login-container {
    max-width: 98vw;
    padding: 20px 4vw 32px 4vw;
  }
}