body,
* {
    margin: 0;
    padding: 0;
}

#wrapper {
    background-color: whitesmoke;
    margin: auto;
}

table {
    margin: 2px 20px;
    border: 1px solid black;
    width: 90%;
    border-collapse: collapse;
}

td {
    font-size: 20px;
    color: rgb(12, 12, 12);
    height: 50px;
    line-height: 50px;
    border: 1px solid rgb(145, 141, 141);
    text-align: center;
}

.td1 {
    width: 30%;
    font-weight: bold;
}

.td2 {
    width: 60%;
}

hr {
    border-color: steelblue;
    margin: 10px 20px 10px;
}

h3 {
    text-align: center;
    height: 80px;
    line-height: 80px;
    font-size: 30px;
    color:white;
    background:steelblue;
}
h3#h31{
    font-size: 20px;
    font-weight: lighter;
}

p {
    text-align: center;
    height: 60px;
    line-height: 60px;
    font-size: 20px;
    color: steelblue;
}

#id3 {
    width: 90%;
    margin: auto;
    text-align: left;
    font-size: 20px;
}

input {
    height: 30px;
    line-height: 30px;
    font-size: 20px;
    display: inline-block;
    width: 138px;
    border-radius: 8px;
    border: 2px solid steelblue;
    text-align: center;
}

#id4 {
    height: 36px;
    line-height: 36px;
    width: 48px;
    margin: 0 20px;
    background-color: steelblue;
    font-weight: bold;
    color: white;
    vertical-align: middle;
    padding: 0;
}

#id5 {
    font-weight: bold;
    color: rgb(233, 61, 9);
    text-align: center;
    height: 36px;
    line-height: 36px;
    font-size: 20px;
}
td.td2#dj{
    font-weight: bold;
    color: rgb(233, 61, 9); 
}

nav {margin:10px 20px; width:90%;}  

.list1 li {list-style-type:none; } 
/*“非首位子元素”选择符*/ 
.list1 li + li a{border-top:.1px dashed gray;} 
/*为链接添加样式*/ 
.list1 a {display:block; padding:3px 10px;text-decoration:none; font:18px Exo, helvetica, 
 arial, sans-serif; font-weight:400; color:#181718e8;text-align: center; height: 30px; line-height: 30px;} 
/*悬停高亮*/ 
.list1 a:hover {color:#069;}
h5{
    font-size: 18px;
    color: #069;
}