.blog_main {
    width: 890px;
    margin-top: 10px;
}

.blog_nav {
    margin-bottom: 5px;
    list-style: none;
}

.blog_nav:before, .blog_nav:after {
    content: " ";
    display: table;
}

.blog_nav:after {
    clear: both;
}

.blog_nav-tabs {
    border-bottom: 1px solid #ddd;
}

.blog_nav-tabs > li {
    float: left;
    margin-bottom: -1px;
}

.blog_nav > li {
    position: relative;
    display: block;
}

.blog_nav-tabs > li.active > a, .blog_nav-tabs > li.active > a:hover, .blog_nav-tabs > li.active > a:focus {
    color: #555;
    background-color: #fff;
    border: 1px solid #ddd;
    border-bottom-color: transparent;
    cursor: default;
}

.blog_nav-tabs > li > a {
    margin-right: 2px;
    line-height: 1.42858;
    border: 1px solid transparent;
    border-radius: 4px 4px 0 0;
}

.blog_nav > li > a {
    position: relative;
    display: block;
    padding: 10px 15px;
}

.blog_main_pic img {
    width: 100%;
    margin-bottom: 10px;
}