/* General Styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
    /* background: url('images/hg-bg1920x1080.jpg') no-repeat center center fixed;
    background-size: cover;
    backdrop-filter: brightness(1); /* 深色背景 */
  }

  /*实现透明层伪元素*/
  .main-background1 {
    background: url('images/1920x1080-bg01.jpg') no-repeat center center fixed;
    background-size: cover;
    backdrop-filter: brightness(1); /* 深色背景 */
  }
  .main-background2 {
    background: url('images/1920x1080-bg02.jpg') no-repeat center center fixed;
    background-size: cover;
    backdrop-filter: brightness(1); /* 深色背景 */
  }
  .main-background3 {
    background: url('images/1920x1080-bg03.jpg') no-repeat center center fixed;
    background-size: cover;
    backdrop-filter: brightness(1); /* 深色背景 */
  }
  .main-background4 {
    background: url('images/1920x1080-bg04.jpg') no-repeat center center fixed;
    background-size: cover;
    backdrop-filter: brightness(1); /* 深色背景 */
  }
  
  
  header {
    text-align: center;
    padding: 20px;
    background-color: #fff;
    border-bottom: 1px solid #ccc;
  }
  
  .header h1 {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 8px;
}
  
  .logo img {
    width: 50px;
    vertical-align: middle;
  }

  .triangle {
    position: absolute;
    top: 0;
    left: 0;
    width: 96px; /* 图片的宽度 */
    height: 96px; /* 图片的高度 */
    background-image: url('images/triangle-image.png'); /* 替换为你的图片路径 */
    background-size: cover; /* 让图片填满容器 */
    background-repeat: no-repeat; /* 防止图片重复 */
    background-position: center; /* 居中显示图片 */
  }
  
  .logo h1 {
    display: inline-block;
    margin-left: 10px;
    font-size: 20px;
    color: #333;
  }
  
  .highlight {
    color: red;
    font-weight: bold;
  }
  
  .section-title {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px; /* 增加标题与 logo 图片之间的间隔 */
  }
  
  
  .section-title img.logo-placeholder {
    height: 100%; /* 匹配标题高度 */
    max-height: 60px; /* 防止超高 */
    object-fit: contain;
  }
  
  
  .description {
    color: #ccc;
    text-align: center;
    margin: 0;
    padding-top: 30px;
  }
 



  .buttons-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    padding: 20px 20px 80px 20px;
  }

/* 这里是处理遮罩层*/
 
  
  .button-group {
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 8px;
    width: 220px;
    text-align: center;
    padding: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .button {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f5f5f5;
    padding: 10px;
    margin: 10px 0;
    border-radius: 5px;
    font-weight: bold;
    text-decoration: none;
    color: #333;
  }
  
  .button:hover {
    background-color: #e0e0e0;
  }
  
  .link-button {
    display: inline-block;
    margin: 5px 0;
    padding: 8px 15px;
    text-decoration: none;
    background: linear-gradient(90deg, #f6d365, #d08c4d);
    color: white;
    font-size: 14px;
    border-radius: 12px;
    border: none;
    transition: transform 0.2s, background-color 0.3s;
  }
  
  .link-button:hover {
    background: linear-gradient(90deg, #ebad4a, #f6d365);
    transform: scale(1.05);
  }
  
  .icon-member::before {
    content: '👤'; /* Replace with an actual member icon or SVG */
    margin-right: 8px;
  }
  
  .icon-admin::before {
    content: '🛠️'; /* Replace with an actual admin icon or SVG */
    margin-right: 8px;
  }
  
  .footer-text {
    text-align: center;
    margin: 20px 0;
    font-size: 14px;
    color: #ccc;
  }
  
  .shortcut {
    font-weight: bold;
    color: #ccc;
  }
  
  /* Responsive Design */
  @media (max-width: 768px) {
    .buttons-container {
      flex-direction: column;
      align-items: center;
    }
  
    .button-group {
      width: 90%;
    }
  
    .logo h1 {
      font-size: 16px;
    }
  
    .section-title {
      font-size: 16px;
    }
  
    .footer-text {
      font-size: 12px;
      color: #ccc;
    }
  }