.top {
    height: auto;
    width: 100%;
    overflow: hidden;
    font-family: "Microsoft YaHei";
    /* background-color: khaki; */
}
.t {
    float: left;
}
.IGDS {
    font-size: 160px;
}
.s-right {
    font-size: 24px;
}
.left {
    float: left;
    width: 40%;
    height: 30%;
    text-align: right;
    /* padding-right: 20px; */
}
.right {
    height: 30%;
    width: 60%;
    text-align: center;
    /* padding-left: 20px; */
    
}
/* 以上是头部样式 */
.btn-group {
    font-size: 0;
    width: 100%;
}
.btn-group button{
    width: 100%;
    font-size: 12px;
    background-color: #4CAF50; /* Green background */
    border: 1px solid green; /* Green border */
    color: white; /* White text */
    padding: 10px 24px;
}
.btn-group:after {
    content: "";
    clear: both;
    display: table;
}

.btn-group button:not(:last-child) {
    border-right: none; /* Prevent double borders */
}

/* Add a background color on hover */
.btn-group button:hover {
    background-color: #3e8e41;
}
.dropbtn {
    width: 100%;
    font-size: 12px;
    background-color: #4CAF50; /* Green background */
    border: 1px solid green; /* Green border */
    color: white; /* White text */
    padding: 10px 24px;
    /* padding-right: 5%; */
    /* padding-left: 5%; */
    /* padding-top: 10px; */
    /* padding-bottom: 10px; */
    cursor: pointer; /* Pointer/hand icon */
    float: left;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    width: 100%;
    min-width: 100%;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {background-color: #f1f1f1}

.dropdown:hover>.dropdown-content {
    display: block;
}

.dropdown:hover>.dropbtn {
    background-color: #3e8e41;
}
.btn-group>a,span {
    flex: 1;
}
body{
    background-color: #f3f3f3;
}
/* .top {
    background-color: #3e8e41;
} */