    html{
        font-size: 16px;
    }
    .topics_guide {
        font-family: "Noto Sans JP", sans-serif;
        font-optical-sizing: auto;
        font-weight: 400;
        font-style: normal;
        width: 1200px;
        background-color: #fff;
        color: #333;
    }
    .topics_guide * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

/* 背景 */
    .bg_f5, .bg_fe, .bg_ddd ,.bg_f1{
        padding: 2rem;
        width: 100%;
    }
    .bg_f5 { 
        background-color: #f5f5f5; 
    }
    .bg_fe {
        background-color: #fefefe; 
        border-radius: 5px; 
        box-shadow: #eee 4px 4px 10px;
        padding: 1.5rem;
    }
    .bg_ddd {
        background-color: #ddd; 
    }
    .bg_f1{
        background-color: #efefef; 
    }

/* テキスト */
    .page_title h2{
        margin: 1.5rem 0 .2rem 0;
        font-size: 2rem;
        font-weight: 700;
    }
    .topics_guide .inner h3{
        font-size: 1.75rem;
        line-height: 1.4;
        font-weight: 700;
    }
    .topics_guide .inner .inner_contents h3{
        font-size: 1.5rem;
        line-height: 1.4;
        margin-bottom: .5rem;
        font-weight: 700;
    }
    .inner_contents p, .inner_contents li, .inner_contents a{
        line-height: 1.7;
        font-feature-settings: "palt";
        letter-spacing: 0.01rem;
    } 
    .inner_contents a{
        color: #333;
        text-decoration: underline;
    }
    .mb + p.txt_emphasis{
        margin: 0.2rem 0;

    }
    .inner_contents a:hover{
        color: #333;
        opacity: .7;
    }
    .txt_center{
        text-align: center;
    }
	.txt_emphasis {
		font-weight: 600;
        font-size: larger;
    }

    .txt_small{
        font-size: 15px;
    }
    .txt_bold{
        font-weight: 600;
    }
    .txt_note{
        color: #CF1725;
    }
    .txt_highlight{
        font-weight: 600;
        background: linear-gradient(transparent 70%, rgba(189, 41, 53, .3) 70%);
    }
    .txt_subheading{
        color: #bd2935;
        font-weight: 600;
    }
    .txt_enclosed{
        border: 1px solid #707070;
        padding: 2px;

    }
    .indent-1{
        display: block;
        padding-left:1em;

		text-indent:-1em;
    }

/* リスト */
    .topics_guide ul {
        list-style: none;
        padding-left: 1.5rem;
    }
    .topics_guide ol {
        list-style-type: decimal;
        padding-left: 2rem;
        
    }
    .topics_guide li{
        position: relative;
        padding-left: 0;
        margin-bottom: .75rem;
    }
    .topics_guide li:last-of-type{
        margin-bottom: 0;
    }
    .topics_guide ul li::before{
        position: absolute;
        content: "";
        width: 0.375em;
        height: 0.375em;
        border-radius: 50%;
        background-color: #bd2935;
        top: .7rem;
        left: -1em;
    }
    .topics_guide .list_disc{
        padding-left: 1rem;
    }
    .topics_guide .list_disc li {
        margin-bottom: 0;
    }

    .topics_guide .list_disc li::before {
        position: absolute;
        content: "";
        width: 0.375em;
        height: 0.375em;
        border-radius: 50%;
        background-color: #707070;
        top: .7em;
        left: -.7em;
    }
    .topics_guide ul .subheading {
        position: relative;
    }
    .topics_guide ul .subheading::before {
        position: absolute;
        content: "";
        width: 10px;
        height: 10px;
        border-radius: 0%;
        background-color: #bd2935;
        top: .5rem;
        left: -1.1rem;
    }
    .topics_guide ol:has>.number_list {
        list-style: none;
        counter-reset: ol;
    }
    .topics_guide ol .number_list {
        list-style: none;
        counter-increment: number;
        position: relative;
    }
    .topics_guide ol .number_list::before {
        position: absolute;
        display: inline-block;
        content: counter(number);
        color: #fff;
        font-size: .625rem;
        font-weight: 600;
        background-color: #bd2935;
        border-radius: 20px;
        top: .5em;
        left: -1.7rem;
        width: 1.125rem;
        height: 1.12rem;
        text-align: center;
    }


/* ボックス */
    .topics_guide .sc_wrapper{
        position: relative;
        margin: 0;
        padding: 0;
        color: #333;
    }
    .topics_guide .inner{
        padding: 0;
        margin: 0;
        margin-bottom: 4rem;
        font-size: 16px;
        line-height: 1.7rem;
    }
    .topics_guide .inner:nth-child(1){
        margin-bottom: 1.5rem;
    }
    .topics_guide .inner:last-child{
        margin-bottom: 0;
    }
    .topics_guide .inner_contents{
        margin-bottom: 2.5rem;
    }
    .topics_guide .block{
        margin-bottom: 1.5rem;
    }
    .topics_guide .block:last-of-type{
        margin-bottom: 0;
    }

    .topics_guide .mb{
        margin-bottom: 1.5rem;
    }
    .topics_guide .mb:last-of-type{
        margin-bottom: 0;
    }
    .topics_guide .box_note{
        border: #bbb solid 1px;
        background-color: #fefefe;
        padding: .5rem;
        padding-left: 2rem;
        position: relative;
        border-radius: 5px;
    }
    .topics_guide .box_note::before {
        position: absolute;
        content: "";
        width: 16px;
        height: 16px;
        display: block;
        top: .85rem;
        left: .7rem;
        background: url(/images/guide/assets/img/icon/icon_caution.png) no-repeat left top;
        background-size: 16px 16px;
    }
    .topics_guide .box_link{
        border: #707070 solid 1px;
        background-color: #fefefe;
        padding: 2rem .5rem .5rem;
        position: relative;
        max-width: 400px;
        margin: .7rem 0 0;
        border-radius: 5px;
    }
    .topics_guide .box_link::before{
        position: absolute;
        content: "\95A2\9023\30EA\30F3\30AF";
        top: 0;
        left: 0;
        color: #fff;
        font-size: 0.9rem;
        width: 100%;
        height: auto;
        text-align: center;
        border-radius: 3px 3px 0 0;
        background-color: #707070 ;
    }
    .box_link a{
        padding-left: 1.5rem;
        margin: 0;
        position: relative;
        display: inline-block;
    }
    .box_link a::before{
        position: absolute;
        content: "";
        transform: rotate(-45deg);
        width: 0.3rem;
        height: 0.3rem;
        border-bottom: 2px solid #bd2935;
        border-right: 2px solid #bd2935;
        top: .75rem;
        left: .5rem;
    }

/* 画像 */
    div:has(>.guideimg){
        text-align: center;
        margin: 0;
        margin-bottom: 8px;
    }
    .guideimg{
        width: 100%;
        height: auto;
        border: #ddd 1px solid;
    }


/* シェイプ */
    .triangle_a, .triangle_b{
        position: relative;
    }
    .triangle_a::before, .triangle_b::after{
        position: absolute;
        content: '';
        display: block;
        left: 50%;
        transform: translateX(-50%);
        clip-path: polygon(0 0, 100% 0%, 100% 5%, 50% 100%, 0 5%);
        width: 100%;
        height: 40px;
    }
    .triangle_a::before {
        top: -1px;
        background-color: #fff;
    }
    .triangle_b::after {
        bottom: -39px;
        background-color: #ddd;
    }
    .topics_guide .inner .inner_contents .triangle_a h3{
        margin-top: 2rem;
    }
    .triangle{
        position: relative;
        margin-bottom: 2rem;
    }
    .triangle::before{
        position: absolute;
        content: "";
        clip-path: polygon(0% 0%, 100% 0%, 50% 100%);
        width: 3rem;
        margin: 0;
        height: .8rem;
        left: 50%;
        bottom: -1.5rem;
        transform: translateX(-50%);
        background-color: #aaa;
    }
    .underline_bold{
        border-bottom: solid 2px #bd2935;
    }
    .underline_red{
        border-bottom: solid 1px #bd2935;
        margin-bottom: 1rem;
    }
    .topics_guide .inner .right_mark{
        border-left: #bd2935 solid 5px;
        padding: 0 .5rem 0;
    }
    .flow{
        background-color: #707070;
        color: #fff;
        font-weight: 600;
        font-size: 16px;
        padding: .7rem;
        display: inline-block;
        position: relative;
        flex: 1;
        align-self: center;
        text-align: center;
    }
    .flow::before{
        position: absolute;
        content: "";
        left: -1px;
        top: 0;
        background-color: #f5f5f5;
        width: 8px;
        height: 100%;
        clip-path: polygon(0% 0%, 10% 0, 100% 50%, 10% 100%, 0% 100%);
    }
    .flow::after{
        position: absolute;
        content: "";
        right: -7px;
        top: 0;
        background-color: #707070;
        width: 8px;
        height: 100%;
        clip-path: polygon(0% 0%, 10% 0, 100% 50%, 10% 100%, 0% 100%);
    }
    .flow:first-of-type::before{
        position: absolute;
        content: "";
        left: 0;
        top: 0;
        width: 0;
        height: 0;
    }
    .flow:first-of-type{
        padding-left: 1rem;
    }
    .flow:last-of-type{
        margin-right: 8px;
    }


/* フレックスボックスレイアウト */
    .topics_guide .flex{
        display: flex;
        flex-flow: row;
        justify-content: space-between;
        min-width: 0;
        column-gap: 1.5rem;
    }
    .flex:has(>.flow){
        column-gap: 8px;
    }
/* 幅調整 */
    .w25{
        width: calc(100%/4);
    }
    .w75{
        width: calc(100% - (100% / 4));
    }
    .w50{
        width: calc(100%/2);
    }
    .w33{
        width: calc(100%/3);
    }


/* メニュー */
    .menu .flex{
        column-gap: 1rem;
    }
    .menu .block{
        position: relative;
        font-weight: 600;
    }
    .menu .w25{
        background: #f5f5f5;
        padding: 1rem;
        margin-bottom: 0;
        border-radius: 5px;
    }
    .menu .w25 h3{
        padding-left: 1.75rem;
        position: relative;
        margin-bottom: 0;
    }
    .menu .w25 h3::before{
        position: absolute;
        content: "";
        top: .8em;
        transform: translateY(-50%);
        left: 0;
        background: url(/images/guide/assets/img/icon/icon_help.png) no-repeat;
        background-position: top left;
        background-size: contain;
        width: 1.375rem;
        height: 1.375rem;
    }
    .menu .w25 .arrow{
        padding-left: 1.75rem;
        position: relative;
        display: block;
        margin-bottom: 0;
    }
    .menu .w25 .arrow::before{
        position: absolute;
        content: "";
        width: 0.3rem;
        height: 0.3rem;
        border-bottom: 2px solid #bd2935;
        border-right: 2px solid #bd2935;
        top: 50%;
        left: .75rem;
        transform: translate(0,-50%) rotate(-45deg);
    }
    .menu .w75  a{
        border: #ccc 1px solid;
        flex: 1;
        padding: .5rem 0 .5rem;
        text-align: center;
        margin-bottom: 0;
        display:block;
        background-color: #fefefe;
        border-radius: 5px;
        text-decoration: none;
        color: #333;
    }
    .menu .w75  a p{
        margin: 0;
    }
    .menu .w75  img{
        width: 116px;
        height: 76px;
        object-fit: contain;
        display: block;
        margin: auto;
    }
    .menu .w75 div:nth-of-type(1){
        margin-bottom: 1em;
    }

/* ナビゲーション */
.topics_guide .nav_list{
        margin: 1rem 0 0;
        padding: 0;
        width: 1200px;
        display: flex;
        flex-flow: row ;
	}
	.topics_guide .nav_list li{
        margin: 0;
        padding: 0;
		list-style: none;
		display: block;
        flex: 1;
	}
    .topics_guide .nav_list li::before{
        position: absolute;
        content: "";
        width: 0;
        height: 0;
    }
	.nav_list li a{
		position: relative;
		display: block;
		width: 100%;
        text-align: center;
		height: 60px;
        padding-bottom: 16px;
        color: #333;
		font-weight: 600;
        background: #fff;
		font-size: 16px;
		text-decoration: none;
		border-bottom:solid 1px #f5f5f5;
        display: flex;
        justify-content: center;
        align-items: center;
        line-height: 1.2rem;
	}
	.nav_list li a:hover{
		background: #eee;
		text-decoration: none;
	}
	.nav_list li a::before{
		content: '';
		position: absolute;
        bottom: 14px;
		width: 0.375rem;
		height: 0.375rem;
		border-top: 2px solid #bd2935;
		border-right: 2px solid #bd2935;
        left: 50%;
        transform: translateX(-50%) rotate(135deg);
	}
    .nav_list li a p{
        padding: 0;
        margin: 0;
    }

    .nav-item.active{
        background-color: #eee;
    }
	#nav_sticky {
    position: sticky;
    margin-top: 0;
    top: 0;
    z-index: 99;
	}

/* 追従見出し */
    .head_sticky{
        position: sticky;
        top: 95px;
    }
    a.menu-item{
        text-decoration: none;
    }
    .menu-item.active {
        position: relative;
    }
    
    .menu-item.active::before { 
        position: absolute;
        content: "";
        clip-path: polygon(100% 50%, 0% 100%, 0% 0%);
        background-color: #bd2935;
        width: 8px;
        height: 8px;
        left: -.6em; 
        top: .6em;
    }

/* ページトップボタン */
    #page-top {
        position: fixed;
        bottom: 50px;
        right: 20px;
        font-size: 14px;
        line-height: 1;
        z-index: 99;
    }
    #page-top a {
        position: relative;
        background: #707070;
        text-decoration: none;
        color: #fff;
        width: 2.5rem;
        height: 2.5rem;
        text-align: center;
        display: block;
        border-radius: 50%;
        opacity: .8;
        transition: all .3s ease;
    }
    #page-top a::after {
        position: absolute;
        content: "";
        width: .6rem;
        height: .6rem;
        border-top: solid 2px #fff;
        border-right: solid 2px #fff;
        top: 58%;
        left: 50%;
        transform: translate(-50%,-58%) rotate(-45deg);
    }