*{ margin:0; padding:0; border:none; font-family:"微软雅黑"; font-size:14px; color:#333; }
ul li{ list-style:none;}

.container{ width:1200px; height:100%; margin:0 auto; position:relative; }
.left{ width:283px; height:auto; position: absolute; left:0; top:0; padding:40px 0 0; float:left; border-style:solid; border-color:#d4d4d4; border-width:0 1px 1px 1px; }
.right{ width:815px; height:auto; padding:100px 50px 100px 335px; }


.doc_logo{ display:block; margin:0 auto 30px;}
.doc_title{display:block;  margin: 30px auto 49px;}
.one_menu{ border-top:solid 1px #d4d4d4;}
.one_menu a{ border-left:solid 4px transparent;font-family:"微软雅黑";text-decoration:none;color:#333;}
.one_menu a.active, .one_menu a:hover, .one_menu a:active{ border-left:solid 4px #dd4b39; background-color:#efefef; color:#dd4b39; font-weight: 500;}
.one_menu_item>a{ display:block; width:219px; height:56px; padding:0 10px; line-height:56px; font-size:16px; font-weight: 500; border-bottom:solid 1px #d4d4d4 ;font-family:"微软雅黑";text-decoration:none;color:#333;}
.two_menu{ margin:14px 0; display: none; }
.two_menu_item>a{ position:relative; display:block; width:220px; height:34px; padding:0 20px; line-height:34px; font-size:14px;font-family:"微软雅黑";text-decoration:none;color:#333;}
.two_menu_close{ background:url("images/select_close.png") 180px center no-repeat;}
.two_menu_open{ background:url("images/select_open.png") 180px center no-repeat;}
.three_menu{ margin:8px 0; display: none;}
.three_menu_item>a{ display:block; width:164px; height:34px; padding:0 30px; line-height:34px; font-size:15px; background: url("images/point_icon.png") 22px center no-repeat; font-family:"微软雅黑";text-decoration:none;color:#333;}
.three_menu_item>a.active, .three_menu_item>a:hover, .three_menu_item>a:active{ background-image:url("images/point_icon_active.png");}


.right h3{ font-size:24px; color:#dd4b39; font-weight: 500; margin-bottom:38px;}
.right h4{ font-size:19px; margin-bottom:15px; background:url("images/point_icon.png") left center no-repeat; padding-left:18px;}
.right p{ font-size:16px; line-height:30px; margin-bottom:26px; padding-left:20px;}





.back-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background: rgba(0, 0, 0, 0.5);
    width: 50px;
    height: 50px;
    display: block;
    text-decoration: none;
    -webkit-border-radius: 35px;
    -moz-border-radius: 35px;
    border-radius: 35px;
    display: none;
}
.back-to-top i {
    color: #fff;
    margin: 0;
    position: relative;
    left: 15px;
    top: 14px;
    font-size: 22px;
}
.back-to-top:hover {
    background: rgba(0, 0, 0, 0.9);
    cursor: pointer;	
}
.book.color-theme-1 .back-to-top {
    background: rgba(112, 66, 20, 0.5);
}
.book.color-theme-1 .back-to-top i {
    color: #f3eacb;
}
.book.color-theme-1 .back-to-top:hover {
    background: rgba(112, 66, 20, 0.9);
}
.book.color-theme-2 .back-to-top {
    background: rgba(189, 202, 219, 0.5);
}
.book.color-theme-2 .back-to-top i {
    color: #1C1F2B;
}
.book.color-theme-2 .back-to-top:hover {
    background: rgba(189, 202, 219, 0.9);
}

@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 480px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) {
	.back-to-top {
		bottom: 10px;
		right: 10px;
	}
}