body{
    margin:  0px;
    padding:  0px;
    width: 100%;
}

/*
表单样式
*/
.form {
    border-radius: 5px;
    background-color: #f2f2f2;
    padding: 20px;
    width: 97%;
}

form>input[type=text] {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

form>input[type=password] {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

form>input[type=button] {
    width: 100%;
    background-color: #4CAF50;
    color: white;
    padding: 14px 20px;
    margin: 8px 0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

form>input[type=button]:hover {
    background-color: #4CAF50;
}

/*
页眉样式：采用flex布局
*/
.header{
    display: flex;
    flex-direction:row;
    flex-wrap:wrap;
    background-color: #000000;
    color: white;
}

.logo{
    width: 80px;
    text-align: center;
}

.menu{
    display: flex;
    flex-direction:row;
    vertical-align: middle;
    align-items: center;
}

.menuitem{
    width: 120px;
    text-align: center;
}


/*
内容样式
*/
.content {
    padding: 10px;
    display: none;
}

/*
表格样式:采用grid布局
*/
.tableycontent {
    top: 100px;
    width: 100%;
}

.tablerow {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-row-gap: 0px;
    margin-top: 0px;
    margin-bottom: 0px;
    padding-top: 0px;
    padding-bottom: 0px;
    border-top: darkgray solid 1px;
}

.tablecell {
    padding-left: 20px;
    height: 30px;
    padding-top: 15px;
    margin: 0px;
}

/*
分页样式
*/
ul.pagination {
    display: inline-block;
    padding: 0;
    margin: 0;
}

ul.pagination li {display: inline;}

ul.pagination li a {
    color: black;
    float: left;
    padding: 8px 16px;
    text-decoration: none;
}

ul.pagination li a.active {
    background-color: #4CAF50;
    color: white;
}

ul.pagination li a:hover:not(.active) {background-color: #ddd;}