:root {
    --text-color: black;
    --bg-color: white;
    --body-color: white;
}

body {
    background-color: var(--body-color);
}
  
* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: var(--text-color); /*000000*/
}

a:hover {
    text-decoration: none;
}
li {
    list-style-type: none;
}

#navigation{
    background-color: var(--bg-color);  /*250, 250, 250*/
    height:50px;
    border-top:5px solid orange;
    border-bottom:1px solid rgb(200, 200, 200);
}
#navigation a{
    display:inline-block;
    height:40px;
    padding:0 20px;
    margin:0 5px;
    /* 水平居中 */
    text-align: center;
    /* 上下居中 */
    line-height: 40px;
    font-size:14px;
    color: var(--text-color);  /*000000*/
    /* 取消下划线 */
    text-decoration: none;
}
/* 设置鼠标悬停时的样式 */
#navigation a:hover{
    background-color: rgb(240, 240, 240);
    color:rgb(255, 128, 0);
}

#navigation ul {
    width: 100%;
    height: 100%;
}
#navigation ul li {
    float: left;
    width: 200px;  
    height: 100%;
    text-align: center;
    line-height: 50px;
    margin-left: 10px;
}
#navigation ul li div {
    overflow: hidden;
    position: absolute;
    width: 200px;
    height: 0;
    background-color: var(--bg-color);  /*fff*/
    /*border: 1px solid rgb(189, 189, 189);*/
    /* border-radius: 10px; */
    transition: height 0.2s ,border 0.2s linear;
    -moz-transition:height 0.2s ,border 0.2s linear;
    /* Safari and Chrome */
    -webkit-transition:height 0.2s ,border 0.2s linear;
    /* Opera */
    -o-transition:height 0.2s ,border 0.2s linear;
}
#navigation ul li:hover div {
    height: 120px;
    width: 200px;
    border: 1px solid rgb(189, 189, 189);
    z-index: 10;
}
#navigation ul li div ul {
    width: 100%;
    height: 120px;
}
#navigation ul li div ul li {
    margin: 0 0 0 0;
    width: 200px;
    height: 40px;
    line-height: 30px;
}
#navigation ul li div ul li a{
    display: block;     /*填充li*/
    color: var(--text-color);  /*000000*/
}

.switch {
    font-size: 17px;
    position: relative;
    display: inline-block;
    width: 64px;
    height: 34px;
  }
  
  .switch input {
    opacity: 0;
    width: 0;
    height: 0;
  }
  
  .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #73C0FC;
    transition: .4s;
    border-radius: 30px;
  }
  
  .slider:before {
    position: absolute;
    content: "";
    height: 30px;
    width: 30px;
    border-radius: 20px;
    left: 2px;
    bottom: 2px;
    z-index: 2;
    background-color: #e8e8e8;
    transition: .4s;
  }
  
  .sun svg {
    position: absolute;
    top: 6px;
    left: 36px;
    z-index: 1;
    width: 24px;
    height: 24px;
  }
  
  .moon svg {
    fill: #73C0FC;
    position: absolute;
    top: 5px;
    left: 5px;
    z-index: 1;
    width: 24px;
    height: 24px;
  }
  
  /* .switch:hover */.sun svg {
    animation: rotate 15s linear infinite;
  }
  
  @keyframes rotate {
   
    0% {
      transform: rotate(0);
    }
  
    100% {
      transform: rotate(360deg);
    }
  }
  
  /* .switch:hover */.moon svg {
    animation: tilt 5s linear infinite;
  }
  
  @keyframes tilt {
   
    0% {
      transform: rotate(0deg);
    }
  
    25% {
      transform: rotate(-10deg);
    }
  
    75% {
      transform: rotate(10deg);
    }
  
    100% {
      transform: rotate(0deg);
    }
  }
  
  .input:checked + .slider {
    background-color: #183153;
  }
  
  .input:focus + .slider {
    box-shadow: 0 0 1px #183153;
  }
  
  .input:checked + .slider:before {
    transform: translateX(30px);
  }


  #group_picture {
    height:500px;
    background-image: url(../src/images/背景图1.jpg);
    overflow:hidden;
    margin-top: 2px;
    background-repeat:no-repeat;
    background-size:contain;
    background-position: center;
}

#group_picture h1 {
    text-align: center;
    margin-top: 150px;
    font-size:60px;
    font-weight:70px;
    letter-spacing: 10px;
}
#show_three {
    /* position属性默认值是static，这里改成相对定位 */
    position:relative;
    display:flex;
    justify-content:center;
    top:-200px;
    height:400px;
}
.show_one {
    width:300px;
    height:100%;
    margin:0 40px;
    background-color: var(--bg-color);
    border-radius: 5px;
    box-shadow: 1px 1px 3px 3px rgba(0, 0, 0, 0.3);
    transition-duration: 0.3s;
}
.show_one:hover{
    box-shadow: 1px 10px 10px -10px rgba(0, 0, 0, 0.7);
    transform: scale(1.1);
}
.show_one table tr td{
    color: var(--text-color);
}
#marquee {
    position:relative;
    top:-100px;
    color: var(--text-color);
    /* overflow:hidden; */
    height:100px;
    width:100%;
    /* direction: "left"; */
    /* background-color: orange; */
} 
#marquee marquee{
    font-size: 30px;
    text-align: center;
    line-height:100px;
} 
.name {
    text-align: center;
    font-size:35px;
    line-height: 50px;
    text-shadow: 3px 3px 3px orange;
    font-family:"楷体";
}
.home {
    text-align: center;
    font-size:20px;
    line-height: 50px;
}
.access {
    text-align: center;
    font-size:20px;
    line-height: 50px;
    color:blue;
    font-style:italic;
}
.access a {
    text-decoration: none;
}

#logo {
    display: grid;
    justify-content: center;  /* 横向：首元素对齐左边缘，末元素对齐右边缘 */
    grid-template-columns: auto auto;
    grid-gap: 20px;
}
#myCanvas{
    background-color: var(--bg-color);
    border: 1px solid #d3d3d3;
}
#logo_detail {
    display: grid;

    color: var(--text-color);
    background-color: var(--bg-color);
    width: 600px;
    height: 390px;
    padding: 10px 10px 10px 10px;

    justify-content: center;
    align-items: center;

    line-height: 40px;
    font-size: 18px;
}