.about_nitriding p{
	padding-bottom: 1.5em;
}

.about_nitriding .em_text{
	color: #c50000;
}

.about_nitriding .under_line{
	padding-bottom: 1px;
    border-bottom: 1px solid;
    display: inline-block;
    line-height: 1;
}
/* @group ===== ガス窒化内のアンカーリンク ===== */
/* ================================================================= */

.about_nitriding .gas_nitriding_menu{
	text-align: center;
}


.about_nitriding .gas_nitriding_list{
	letter-spacing: -0.4em;
    padding: 30px 0 45px;
    width: 80%;
    margin: 0 auto;
}


.about_nitriding .gas_nitriding_item{
	width: calc( (100% - 80px) / 5 );
	display: inline-block;
	height: 0;
	padding-bottom: calc( (100% - 80px) / 5 );
	position: relative;
	letter-spacing: normal;
	margin-left: 20px;
}
.about_nitriding .gas_nitriding_item:nth-of-type(1){
	margin-left: 0;
}
.about_nitriding .gas_nitriding_link{
	background-color: #063391;
	display: inline-block;
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	color: #fff;
	font-size: 20px;
	font-weight: bold;
}

.about_nitriding .gas_nitriding_text{
	position: absolute;
	top: 45%;
	transform:translate(0,-50%);
	left: 0;
	right: 0;
	line-height: 1.2;
	padding: 5px;
}
.about_nitriding .gas_nitriding_link::after{
    content: '';
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translate(-50%,0);
    border-top: 17px solid #fff;
    border-right: 12px solid transparent;
    border-left: 12px solid transparent
}

.about_nitriding .gas_nitriding_content{
	padding: 0 0 50px;
}
.about_nitriding .gas_nitriding_content:last-of-type{
	padding-bottom: 0;
}
.about_nitriding .gas_nitriding_content_title{
    color: #fff;
    background-color: #063391;
    width: 100%;
    border-left: 8px solid #ea5413;
    font-size: 28px;
    font-weight: bold;
    line-height: 1.2;
    padding: 27px 30px 25px;
    margin: 0 0 60px;
}


@media print and (max-width: 991px), screen and (max-width: 991px) {

	.about_nitriding .gas_nitriding_list {
        padding: 10px 0 30px 0;
	}

	.about_nitriding .gas_nitriding_item {
	    width: calc( (100% - 40px) / 5 );
	    padding-bottom: calc( (100% - 40px) / 5 );
	    margin-left: 10px;
	}


	.about_nitriding .gas_nitriding_link{
		font-size: 18px;
	}

	.about_nitriding .gas_nitriding_link::after {
	    border-top: 9px solid #fff;
	    border-right: 8px solid transparent;
	    border-left: 8px solid transparent;
	    bottom: 10px;
	}

	.about_nitriding .gas_nitriding_content_title {
	    border-left: 6px solid #ea5413;
	    font-size: 23px;
	    padding: 17px 20px 15px;
	    margin: 0 0 50px;
	}

}



@media screen and (max-width: 767px) {



	.about_nitriding .gas_nitriding_list {
	    width: 90%;
	}
	.about_nitriding .gas_nitriding_item {
	    width: calc( (100% - 20px) / 5 );
	    padding-bottom: calc( (100% - 20px) / 5 );
	    margin-left: 5px;
	    margin-bottom: 5px;
	}

	.about_nitriding .gas_nitriding_link::after {
	    border-top: 7px solid #fff;
	    border-right: 7px solid transparent;
	    border-left: 7px solid transparent;
	    bottom: 7px;
	}
	.about_nitriding .gas_nitriding_content {
    	padding: 0 0 30px;
	}

	.about_nitriding .gas_nitriding_content_title {
	    border-left: 4px solid #ea5413;
	    font-size: 18px;
	    padding: 12px 10px 10px;
	    margin: 0 0 35px;
	}
}


@media screen and (max-width: 575px) {
	.about_nitriding p{
		padding-bottom: 1em;
	}

	.about_nitriding .gas_nitriding_list {
	    width: 100%;
	    padding: 10px 0 20px;
	}
	.about_nitriding .gas_nitriding_item {
	    width: calc( (100% - 20px) / 3 );
	    padding-bottom: calc( (100% - 20px) / 3 );
	    margin-left: 10px;
	    margin-bottom: 5px;
	}
	.about_nitriding .gas_nitriding_item:nth-of-type(4){
		margin-left: 0;
	}
	.about_nitriding .gas_nitriding_link{
		font-size: 16px;
	}
	.about_nitriding .gas_nitriding_link::after {
	    border-top: 6px solid #fff;
	    border-right: 6px solid transparent;
	    border-left: 6px solid transparent;
	    bottom: 8px;
	}

}

/* @end */