* {
  box-sizing: border-box;
}

html {
  font-size: 24px;
}

body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;     /* 垂直方向排列 children */
  align-items: center;        /* 水平居中所有子元素 */
  justify-content: flex-start;/* 垂直从顶端开始 */
  padding-top: 50px;
  min-height: 100vh;          /* 至少撑满一屏，高度可超出 */
  margin: 0;
  background-size: cover;
  background-position: center;
}

.login-container {
  text-align: center;
  width: auto;
  padding: 0;
  background-color: transparent;
  border-radius: 0;
}

.login-container h2 {
  color: #027de9;
  margin: 0 0 20px;
  font-size: 3rem;
}

.login-container form {
  padding: 0 20px;
}

.login-container form div {
  margin-bottom: 15px;
}

.login-container label {
  display: block;
  text-align: left;
  margin-bottom: 5px;
  font-weight: bold;
}

.login-container input {
  width: 100%;
  padding: 0.4rem;
  margin: 0.5rem 0;
  font-size: 1.6rem;
  border: 1px solid #ddd;
}

.login-container button {
  width: 100%;
  padding: 0.8rem;
  margin: 1rem 0;
  font-size: 1.8rem;
  font-weight: bold;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.login-container button:hover {
  background-color: #45a049;
}

/* 底部 logo 样式 */
.footer-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  margin-top: auto;     /* 吸走中间多余空间，保证在底部 */
  padding-bottom: 1rem;
  background: transparent;
}

.footer-logos img {
  height: 3rem;             /* 统一高度，你可根据需要调整 */
  /* 可选：保持长宽比 */
  object-fit: contain;
}


@media screen and (max-width: 480px) {
  .footer-logos img {
    height: 2rem;
  }
}


@media screen and (max-width: 768px) {
  body {
    font-size: 22.5px;
  }
  .login-container h2 {
    font-size: 1.5rem;
  }
  .login-container input {
    font-size: 1.28rem;
  }
  .login-container button {
    font-size: 1.44rem;
  }
}

@media screen and (max-width: 480px) {
  body {
    font-size: 21px;
  }
  .login-container h2 {
    font-size: 1.3rem;
  }
  .login-container input {
    font-size: 1.152rem;
  }
  .login-container button {
    font-size: 0.96rem;
  }
}