.main-category-4 .sup_text{
  width: 20px;
  height: 20px;
  font-size:14px;
  border-radius: 50%;
  color: #fff;
  line-height: 20px;
  text-align: center;
  background: #7ed320;
  display:inline-block;
}

.main-category-4 #book_page{
	padding-top:80px;
}

.main-category-4 #book_page_content{
	padding:20px 0px 45px 0px;
}

.main-category-4 .bl_index_container {
	position: relative;
	width: 100%;
	min-height: 768px;
	margin: auto;
    overflow: hidden;
}

.main-category-4 .bl_container {
	width: 100%;
	min-height: 768px;
	margin: auto;
}

.main-category-4.header{
	width: 100%;
	height: calc(100vw / 1440 * 45);
	position:fixed;
	z-index: 10000;
}

.main-category-4 .header_base{
	background:#f6cf60;
	width:100%;
	height: calc(100vw / 1440 * 45);
	position:absolute;
	top:0px;
	left:0px;
	z-index:0;
}

.main-category-4 .header_name{
	position:absolute;
	top:10px;
	left:80px;
	width: 720px;
	height: 24px;
	z-index:2;
	font-size:calc(100vw / 1440 * 18);
	color:#000;
	letter-spacing:10px;
	text-shadow:0 -1px 0 rgba(0,0,0,0.50);
	text-align:left;
	font-weight:bold;
}

.main-category-4.img_center {
    display: block;
    margin: 0 auto;
    text-align: center;
}

.main-category-4 .header_user{
	background-image:url('../img/index/header_user_bg.png');
	width: 263px;
	height: 54px;
	position:absolute;
	top:-5px;
	left:761px;
	z-index:1;
}

.main-category-4 .header_avatar{
	background-image:url('../img/index/avatar.png');
	position:absolute;
	top:7px;
	left:791px;
	width: 32px;
	height: 33px;
	z-index:5;
}

.main-category-4 .header_username{
	position:absolute;
	top:calc(100vw / 1440 * 6);
	left:86%;
	width: 124px;
	height: 16px;
	font-size:calc(100vw / 1440 * 14);
	color:#000;
	letter-spacing:2px;
	text-align:left;
	z-index:5;
	font-weight:bold;
}

.main-category-4 .header_userschool{
	position:absolute;
	top:calc(100vw / 1440 * 23);
	left:86%;
	width:124px;
	height: 14px;
	z-index:5;
	font-size:calc(100vw / 1440 * 12);
	color:#000;
	letter-spacing:2px;
	text-align:left;
	overflow:hidden;
}

.main-category-4 .header_logout{
	background-image:url('../img/btn_logout_n.svg');
	position:absolute;
	top: calc(100vw / 1440 * 4);
	right: calc(100vw / 1440 * 12);
	width: calc(100vw / 1440 * 40);
	height: calc(100vw / 1440 * 40);
	background-size: contain;
	z-index:5;
	cursor:pointer;
}

/**/
.main-category-4 .header_menu {
	background-image:url('../img/btn_home_n.svg');
	position:absolute;
    top: calc(100vw / 1440 * 4);
    left: calc(100vw / 1440 * 8);
	width: calc(100vw / 1440 * 40);
	height: calc(100vw / 1440 * 40);
	z-index:5;
	cursor:pointer;
	background-size: contain;
}

.main-category-4 .header_menu.active {
	background-image:url('../img/btn_home_s.svg');
}
/**/

.main-category-4 .module_info_bar{
	background:#888888;
	width:100%;
	height:calc(100vw / 1440 * 10);
	position: absolute;
	top: calc(100vw / 1440 * 40);
	z-index: -1;
	opacity:0.6;
}

.main-category-4 .module_name_bar{
	width:95%;
	margin:0 auto;
}

.main-category-4 .module_name{
	display:inline-block;
	width:50%;
	font-size:16px;
	color:#303936;
	text-align:left;
	line-height:35px;
	font-weight:bold;
}

.main-category-4 .home_btn_part{
	display:inline-block;
	width:48%;
	font-size:16px;
	color:#303936;
	text-align:right;
	line-height:35px;
	cursor:pointer;
	font-weight:bold;
}

.main-category-4 .opigno_activity .progress{
	width: 100%;
	height: 64px;
	position: fixed;
    bottom: 0;
	z-index:1000;
}

.main-category-4 .progress_base{
	background-color:#6AD5C1;
	width:100%;
	height:68px;
	position:absolute;
	top:0;
	left:0;
}

.main-category-4 .progress_text{
	font-size: calc(100vw / 1440 * 20);
    color: #4A4A4A;
    letter-spacing: 2px;
    line-height: calc(100vw / 1440 * 45);
    text-shadow: 0 -1px 0 rgba(0,0,0,0.50);
    text-align: center;
    font-weight: bold;
    display: inline;
    padding: calc(100vw / 1440 * 5) calc(100vw / 1440 * 15);
}

.main-category-4 .progress_prev_btn{
	width: calc(100vw / 1440 * 112);
	height: calc(100vw / 1440 * 44);
	cursor:pointer;
	background: #F6CF60;
	box-shadow: 0 calc(100vw / 1440 * 6) 0 0 rgba(0,0,0,0.50);
	border-radius: 4px;
	margin:0 auto;
	position:absolute;
	display:none;
	top:16%;
	left:4%;
	z-index:5;
	cursor:pointer;
}

.main-category-4 .progress_prev_btn:active{
	background: #EF8B4F;
	box-shadow: 0 1px 0 0 rgba(0,0,0,0.50), inset 0 4px 0 0 rgba(0,0,0,0.50);
}

.main-category-4 .progress_next_btn{
	width: calc(100vw / 1440 * 112);
	height: calc(100vw / 1440 * 44);
	cursor:pointer;
	background: #F6CF60;
	box-shadow: 0 calc(100vw / 1440 * 6) 0 0 rgba(0,0,0,0.50);
	border-radius: 4px;
	margin:0 auto;
	position:absolute;
	display:none;
	top:16%;
	right:4%;
	z-index:5;
	cursor:pointer;
}

.main-category-4 .progress_next_btn:active{
	background: #EF8B4F;
	box-shadow: 0 1px 0 0 rgba(0,0,0,0.50), inset 0 4px 0 0 rgba(0,0,0,0.50);
}

.main-category-4 .progress_next_btn.dim{
	background: #B2C6D4;
	box-shadow: 0 6px 0 0 rgba(0,0,0,0.20);
}

.main-category-4 .page_no_part{
	position:absolute;
	top:20%;
	right:15%;
	font-size:20px;
	color:#303936;
	line-height:35px;
	font-weight:bold;
}

.main-category-4 .pageinput {
    width: 40px;
    height: 25px;
    text-align: center;
	font-size:18px;
    -webkit-appearance: none;
    border: 1px solid lightgray;
    border-radius: 0px;
}

.main-category-4 .footer{
	width: 100%;
	height: 28px;
	position: fixed;
    bottom: 0;
}

.main-category-4 .footer_base{
	background-image:linear-gradient(87deg, rgba(254,245,150,0.50) 0%, #20936d 49%, rgba(254,245,150,0.50) 100%);
	width:100%;
	height:28px;
	position:absolute;
	top:0;
	left:0;
}

.main-category-4 .footer_bar{
	background:#52a76f;
	width:100%;
	height:24px;
	position:absolute;
	top:4px;
	left:0;
}

.main-category-4 .footer_text{
	font-size:12px;
	color:#ffffff;
	width:100%;
	letter-spacing:3px;
	text-shadow:0 -1px 0 rgba(0,0,0,0.50);
	z-index:5;
	position:absolute;
	text-align:center;
	top:8px;
}

.main-category-4 .page_content{
	/* width:95%; */
	margin:0 auto;
	position:relative;
}

.main-category-4 .section{
	color:#3a72ae;
	font-size:32px;
	font-weight:bold;
	line-height:1.8;
}

.main-category-4 .sub_section{
	color:#3e86da;
	font-size:28px;
	font-weight:bold;
	line-height:1.8;
}

.main-category-4 .sub_sub_section{
	color:#303936;
	font-size:24px;
	font-weight:bold;
	line-height:1.8;
}

.main-category-4 .content{
  font-size:20px;
  letter-spacing:2px;
  line-height:1.8;
  z-index:0;
}

.main-category-4 .vocu_content{
  font-size:20px;
  letter-spacing:2px;
  line-height:1.6;
  z-index:0;
}

.main-category-4 .dialogue_content{
  font-size:20px;
  letter-spacing:2px;
  line-height:1.8;
  text-align:justify;
}

.main-category-4 .line_pair_content{
  font-size:20px;
  letter-spacing:2px;
  line-height:1.5;
}

.main-category-4 .game_icon{
	background-image:url('../img/img_icon_game.png');
	width: 96px;
	height: 96px;
	z-index:1;
	display:inline-block;
	vertical-align:middle;
}

.main-category-4 .game_text{
	color:#f6a623;
	font-size:32px;
	font-weight:bold;
	line-height:1.8;
	display:inline-block;	
	vertical-align:middle;
}

.main-category-4 .rd_box{
	border-radius:10px
}

.main-category-4 .rd_box_blue{
	border:3px solid #6ac2d6;
}

.main-category-4 .rd_box_orange{
	border:3px solid #e47d22;
}

.main-category-4 .rd_box_green{
	border:3px solid #daf0c3;
}

.main-category-4 .rd_box_s_green{
	border:3px solid #77c121;
}

.main-category-4 .exp_popup_area {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 20;
    width: 100vw;
    height: 100vh;
}

.main-category-4 .exp_popup{
	position:relative;
	width: 600px;
	z-index: 100;
	margin: 200px auto 0;
}

.main-category-4 .exp_popup_close{
	width: 26px;
	height: 26px;
	background-image: url('../img/btn_close_s.png');
	background-repeat:no-repeat;
	cursor:pointer;
	position:absolute;
	right: 1rem;
	top: 1rem;
}

.main-category-4 .exp_popup_close:active{
	background-image: url('../img/btn_close_s.png');
}

.main-category-4 .exp_popup_md{
	width: 600px;
	background-color: white;
}

.main-category-4 .exp_popup_md a{
	 word-wrap: break-word;
}

.main-category-4 .board_top{
	width: 936px;
	height: 70px;
	background-image: url('../img/img_box03-t.png');
	background-repeat:no-repeat;
}

.main-category-4 .board_md{
	width: 936px;
	background-image: url('../img/img_box03-m.png');
}

.main-category-4 .board_btm{
	width: 936px;
	height: 70px;
	background-image: url('../img/img_box03-b.png');
	background-repeat:no-repeat;
}

.main-category-4 .memo_top{
	width: 936px;
	height: 105px;
	background-image: url('../img/img_box02-t.png');
	background-repeat:no-repeat;
}

.main-category-4 .memo_md{
	width: 936px;
	background-color: #fcfae0;
}

.main-category-4 .article_top{
	width: 936px;
	height: 60px;
	background-image: url('../img/img_box05-t.png');
	background-repeat:no-repeat;
}

.main-category-4 .article_md{
	width: 936px;
	background-image: url('../img/img_box05-m.png');
}

.main-category-4 .article_btm{
	width: 936px;
	height: 60px;
	background-image: url('../img/img_box05-b.png');
	background-repeat:no-repeat;
}

.main-category-4 .click_cursor{
	cursor:pointer;
	width:30px;
	vertical-align:middle;
}

.main-category-4 .box01{
	background-image:url('../img/img_box01.png');
	width:936px;
	height:348px;
}

.main-category-4 .box01_text{
	padding:55px 80px;
}

/**/
.main-category-4 .relative {
	position: relative;
}
.main-category-4 .progress_bar {
	background-image:linear-gradient(-180deg, #dfe0e2 0%, #f7f7f8 100%);
	border-radius:20px;
	width:calc(100vw / 1440 * 730);
	height:20px;
    position: absolute;
    left: calc(100vw / 1440 * ((1440 - 730 - 130) / 2));
    top: 24px;
}
.main-category-4 .progress_bar .pb {
	background-image:linear-gradient(-134deg, #5b4fc7 0%, #dfa5e9 100%);
	border:1px solid rgba(150,150,150,0.10);
	box-shadow:inset 0 3px 8px 0 rgba(0,0,0,0.71);
	width:742px;
	height:14px;
    position: absolute;
    top: 4px;
    left: 4px;
    box-sizing: border-box;
    z-index: 1;
    border-radius: 20px;
}
.main-category-4 .progress_pt {
    display: inline-block;
    position: absolute;
    z-index: 1;
	background-repeat:no-repeat;
	width:0;
	height:0;
	top: 10px;
	cursor:pointer;
}
.main-category-4 .progress_pt::before {
	content: "";
	display: inline-block;
	width:33px;
	height:34px;
	border-radius:34px;
	margin-left: calc(33px / -2);
	margin-top: calc(34px / -2);
}
.main-category-4 .progress_pt div {
	position: absolute;
    /* width: 0; */
    /* height: 0; */
    top: 0;
    left: 0;
}
.main-category-4 .progress_pt div span {
	position: absolute;
    margin-left: -17px;
    width: 34px;
    height: 34px;
    margin-top: -17px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
	color:grey;
	text-shadow: 1px 1px 3px rgba(128, 128, 128, 0.8);
}
.main-category-4 .progress_pt div span.start{
	color:white;
	text-shadow: 1px 1px 3px rgba(255, 255, 255, 0.8);
}
.main-category-4 .progress_pt.s1::before {
	/*
	background-image: url('../img/img_progress_pt01.png');
	*/
	background:#f6f6f6;
	border:1px solid rgba(150,150,150,0.28);
	box-shadow:0 0 6px 0 rgba(0,0,0,0.40), inset 0 4px 8px 0 #ffffff;
}
.main-category-4 progress_pt.s2::before {
	/*
	background-image: url('../img/img_progress_pt03.png');
	*/
	background:#f6a623;
	border:1px solid rgba(150,150,150,0.28);
	box-shadow:0 0 6px 0 rgba(0,0,0,0.40), inset 0 4px 8px 0 #ffffff;
}
.main-category-4 .progress_pt.s3::before {
	/*
	background-image: url('../img/img_progress_pt02.png');
	*/
	background:#7ed321;
	border:1px solid rgba(150,150,150,0.28);
	box-shadow:0 0 6px 0 rgba(0,0,0,0.40), inset 0 4px 8px 0 #ffffff;
}

/**/
.main-category-4 .show_ans_btn {
	-moz-box-shadow:inset 0px 1px 0px 0px #bbdaf7;
	-webkit-box-shadow:inset 0px 1px 0px 0px #bbdaf7;
	box-shadow:inset 0px 1px 0px 0px #bbdaf7;
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #79bbff), color-stop(1, #378de5));
	background:-moz-linear-gradient(top, #79bbff 5%, #378de5 100%);
	background:-webkit-linear-gradient(top, #79bbff 5%, #378de5 100%);
	background:-o-linear-gradient(top, #79bbff 5%, #378de5 100%);
	background:-ms-linear-gradient(top, #79bbff 5%, #378de5 100%);
	background:linear-gradient(to bottom, #79bbff 5%, #378de5 100%);
	filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#79bbff', endColorstr='#378de5',GradientType=0);
	background-color:#79bbff;
	-moz-border-radius:6px;
	-webkit-border-radius:6px;
	border-radius:6px;
	border:1px solid #84bbf3;
	display:inline-block;
	cursor:pointer;
	color:#ffffff;
	font-size:20px;
	font-weight:bold;
	padding:6px 24px;
	text-decoration:none;
	text-shadow:0px 1px 0px #528ecc;
}
.main-category-4 .show_ans_btn:hover {
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #378de5), color-stop(1, #79bbff));
	background:-moz-linear-gradient(top, #378de5 5%, #79bbff 100%);
	background:-webkit-linear-gradient(top, #378de5 5%, #79bbff 100%);
	background:-o-linear-gradient(top, #378de5 5%, #79bbff 100%);
	background:-ms-linear-gradient(top, #378de5 5%, #79bbff 100%);
	background:linear-gradient(to bottom, #378de5 5%, #79bbff 100%);
	filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#378de5', endColorstr='#79bbff',GradientType=0);
	background-color:#378de5;
}

.main-category-4 .show_ans_btn:active {
	position:relative;
	top:1px;
}

.main-category-4 .content{
	font-size:24px;
	color:#4a4a4a;
	letter-spacing:2px;
	line-height:1.6;
}

.main-category-4 .caption{
	font-size:24px;
	color:#4a4a4a;
	letter-spacing:2px;
	line-height:1.6;
}

.main-category-4 .topic{
  font-size:36px;
  font-weight:bold;
}

.main-category-4 .heading{
	color:#b71f6f;
	font-size:28px;
	letter-spacing:2px;
	line-height:1.6;
}

.main-category-4 .subheading{
  color:#cf0032;
  font-size:26px;
  font-weight:bold;
}

.main-category-4 .mc_ans_box_1{
	border-style:solid; 
	border-width:thin;
	display:inline-block;
	width: 24px;
	height: 24px;
	position:relative;
	margin:8px 0px;
}

/*exam alert*/
.main-category-4 .exam_popup_area {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 20;
    width: 100vw;
    height: 100vh;
}

.main-category-4 .exam_popup{
	position:relative;
	width: 800px;
	z-index: 100;
	margin: 80px auto 0;
}

.main-category-4 .exam_popup_close{
	width: 26px;
	height: 26px;
	background-image: url('../img/index/btn_close_s.png');
	background-repeat:no-repeat;
	cursor:pointer;
	position:absolute;
	right:5%;
	top:5%;
}

.main-category-4 .exam_popup_close:active{
	background-image: url('../img/btn_close_s.png');
}

.main-category-4 .exam_popup_md{
	width: 800px;
	background-color: white;
}

.main-category-4 .exam_popup_md a{
	 word-wrap: break-word;
}