.category_block{border-top: 4px #FF6D00 solid;background-color: #ffffff}
.item_content{  border: 1px #eeeeee solid;  border-top: none;  padding: 0 18px;  }
.item_top{  padding: 10px 0;  border-bottom: 1px solid #eeeeee;  }
.top_categoryname{font-size: 16px;font-family: 'Microsoft YaHei', arial, sans-serif;color: #262b86}
.booklist{  padding: 20px 0;  font-family: 'Microsoft YaHei';font-size: 16px;  }
.bookname{  color: #000000; margin-right: 6px  }
.author{  color: #00BFA5;  }
.rank-digit{  display: inline-block;  width: 18px;  font-size: 12px;
    height: 14px;  line-height: 14px;  text-align: center;
    border-radius: 5px;  color: #ffffff;  background-color: #dcdcdc;
    margin-right: 6px;
}


ul.booklist li:nth-child(1) .rank-digit{
    background-color: #FF6D00;
}
ul.booklist li:nth-child(2) .rank-digit{
    background-color: #FF9100;
}
ul.booklist li:nth-child(3) .rank-digit{
    background-color: #FFAB40;
}
#left>li:nth-child(3n+2) .category_block{
    border-color: #00BFA5;
}
#left>li:nth-child(3n+2) ul.booklist li:nth-child(1) .rank-digit{
    background-color: #00BFA5;
}
#left>li:nth-child(3n+2) ul.booklist li:nth-child(2) .rank-digit{
    background-color: #1DE9B6;
}
#left>li:nth-child(3n+2) ul.booklist li:nth-child(3) .rank-digit{
    background-color: #64FFDA;
}
#left>li:nth-child(3n+3) .category_block{
    border-color: #00B8D4;
}
#left>li:nth-child(3n+3) ul.booklist li:nth-child(1) .rank-digit{
    background-color: #00B8D4;
}
#left>li:nth-child(3n+3) ul.booklist li:nth-child(2) .rank-digit{
    background-color: #00E5FF;
}
#left>li:nth-child(3n+3) ul.booklist li:nth-child(3) .rank-digit{
    background-color: #18FFFF;
}

#left>li{ margin-bottom: 20px;padding: 0 10px;}