@charset "utf-8";
/* CSS Document */

.box1 {
    background: url("/site/alo7_textbook/images/alo7_textbook_03.gif") no-repeat scroll left bottom transparent;
    height: 61px;
    margin: 10px 0 27px;
    width: 820px;
}
.menub li {
    float: left;
    margin-top: 0;
    padding: 0 3px 0 0;
    text-align: center;
}
.menub .active1 a {
    background: url("/site/images/classroom_teaching/menu_bg3.png") no-repeat scroll 0 -72px transparent;
    display: block;
    height: 72px;
    width: 110px;
}
.mu1 a {
    background: url("/site/images/classroom_teaching/menu_bg3.png") no-repeat scroll 0 0 transparent;
    display: block;
    height: 72px;
    width: 110px;
}
.mu1 a:hover {
    background-position: 0 -72px;
    display: block;
}
.menub .active2 a {
    background: url("/site/images/classroom_teaching/menu_bg3.png") no-repeat scroll -150px -72px transparent;
    display: block;
    height: 72px;
    width: 110px;
}
.mu2 a {
    background: url("/site/images/classroom_teaching/menu_bg3.png") no-repeat scroll -150px 0 transparent;
    display: block;
    height: 72px;
    width: 110px;
}
.mu2 a:hover {
    background-position: -150px -72px;
    display: block;
}
.menub .active3 a {
    background: url("/site/images/classroom_teaching/menu_bg3.png") no-repeat scroll -300px -72px transparent;
    display: block;
    height: 72px;
    width: 110px;
}
.mu3 a {
    background: url("/site/images/classroom_teaching/menu_bg3.png") no-repeat scroll -300px 0 transparent;
    display: block;
    height: 72px;
    width: 110px;
}
.mu3 a:hover {
    background-position: -300px -72px;
    display: block;
}
.menub .active4 a {
    background: url("/site/images/classroom_teaching/menu_bg3.png") no-repeat scroll -450px -72px transparent;
    display: block;
    height: 72px;
    width: 110px;
}
.mu4 a {
    background: url("/site/images/classroom_teaching/menu_bg3.png") no-repeat scroll -450px 0 transparent;
    display: block;
    height: 72px;
    width: 110px;
}
.mu4 a:hover {
    background-position: -450px -72px;
    display: block;
}
.boxes_01 {
    background-color: #F3F3F3;
    border: 1px solid #C9CACA;
    margin-bottom: 55px;
    padding: 10px;
}