Document

背景のシルエット素材はSILHOUETTE DESIGN様の【花素材1】からお借りしました。カラーコードは#C55A45です。
タイトルは自作なので配布物としています。

1.PC向けソース

CSS

@charset "UTF-8"

@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho&display=swap')

*{margin: 0; padding: 0;}

body{
    color: #505050;
    font-size: 13px;
    font-family: "Shippori Mincho", serif;
    text-align: center;
    letter-spacing: 2.5px;
    line-height:2;
    background-color: #fcfcfc;
}

article{
    width: 90%;
    max-width: 1000px;
    margin: 5% auto;
}

section{
    display: flex;
    background-image: url(img1.png);
    background-size: 120px;
    background-repeat: no-repeat;
    background-position: bottom left 20%;
}

/* リンク */

a{
    text-decoration:none;
    color:#505050;
}

a:visited{
    color:#505050;
}

a:hover{
    color:#c55a45;
}

/* menu */

.menu_box{
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    text-align: left;
    width: 800px;
    height: 650px;
    overflow: scroll;
}

.menu{
    font-size: 18px;
    line-height: 1.5;
    color: #505050;
    margin: 50px 0 0 20px;
}

.contents{
    font-size: 13px;
    padding: 10px;
    margin-right: -2px;
    margin-top: 10px;
}

details[open] .anm {
animation: fadeIn 0.5s ease;
}
@keyframes fadeIn {
0% {
opacity: 0;
}
100% {
opacity: 1;
transform: none;
}
}

summary{
    display: block;
    list-style: none;
}

summary::-webkit-details-marker {
    display: none;
    list-style: none;
}

h1{
    margin: 0;
}

/* タイトル */

.wrap{
    position: relative;
    display: inline-block;
    margin-left: 20px;
}

.box{
    width: 32px;
    height: 400px;
    background-color: #b8c0ba;
    clip-path: polygon(0 10%, 100% 0%, 100% 90%, 0 100%);
}

.ttl{
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    color:#fff;
    letter-spacing: 5px;
    font-size: 18px;
    font-style: italic;
    bottom: 50%;
    left: -4px;
    position: absolute;
}

/* 装飾 */

ul {
    list-style-type: none;
    margin: 5px;
}

li {
    font-size: 13px;
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    position:relative;
    padding: 4px;
}

li:before {
    position:absolute;
    content:'';
    top: -12px;
    right: 9px;
    border-style: solid;
    border-width: 10px 5px 5px 5px;
    border-color: #4b757f transparent transparent transparent ;
}

mark{
    background-color: #e6c8a9;
}

/*  template by (削除しても良いです) */

.empty{
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    text-align: right;
}

/* メディアクエリ */
    
@media screen and (max-width:758px){

*{margin: ; padding: 0;}

body{
        margin: 5% 0;
    }

article{
        width: 350px;
        margin: 5% auto;
    }

.menu_box{
        -ms-writing-mode: tb-rl;
        writing-mode: vertical-rl;
        text-align: left;
        width: 360px;
        height: 600px;
        overflow: scroll;
        }
    
    .menu{
        font-size: 18px;
        line-height: 1.5;
        color: #505050;
        margin-top: 50px;
        }

.wrap{
        position: relative;
        display: inline-block;
        }
        
        .box{
        width: 32px;
        height: 400px;
        background-color: #b8c0ba;
        clip-path: polygon(0 10%, 100% 0%, 100% 90%, 0 100%);
        }

ul {
        list-style-type: none;
        margin: 5px;
        margin-top: 50px;
        }
}

HTML

【しっぽり明朝】を使用しています。nanoやalice+などでご使用の際は、CSSの@importを削除して、Googleフォントからlinkを取得して、headに組み込んでください。

2.スマホ向けソース

CSS

@charset "UTF-8"

@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho&display=swap')

*{margin: 0; padding: 0;}

body{
    color: #505050;
    font-size: 13px;
    font-family: "Shippori Mincho", serif;
    text-align: center;
    letter-spacing: 2.5px;
    line-height:2;
    background-color: #fcfcfc;
}

article{
    width: 90%;
    max-width: 380px;
    margin: 5% auto;
}

section{
    display: flex;
    background-image: url(img1.png);
    background-size: 120px;
    background-repeat: no-repeat;
    background-position: bottom left 20%;
}

/* リンク */

a{
    text-decoration:none;
    color:#505050;
}

a:visited{
    color:#505050;
}

a:hover{
    color:#c55a45;
}

/* menu */

.menu_box{
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    text-align: left;
    width: 360px;
    height: 580px;
    overflow: scroll;
}

.menu{
    font-size: 18px;
    line-height: 1.5;
    color: #505050;
    margin: 50px 0 0 20px;
}

.contents{
    font-size: 13px;
    padding: 10px;
    margin-right: -26px;
    margin-top: 50px;
}

h1{
    margin: 0;
}

/* コンテンツ */

.pages{
    margin: 35px 0 10px 0;
}

/* タイトル */

.wrap{
    position: relative;
    display: inline-block;
    margin-left: 20px;
}

.box{
    width: 32px;
    height: 400px;
    background-color: #b8c0ba;
    clip-path: polygon(0 10%, 100% 0%, 100% 90%, 0 100%);
}

.ttl{
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    color:#fff;
    letter-spacing: 5px;
    font-size: 18px;
    font-style: italic;
    bottom: 45%;
    left: -4px;
    position: absolute;
}

.ttl_m{
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    color:#fff;
    letter-spacing: 5px;
    font-size: 18px;
    font-style: italic;
    bottom: 50%;
    left: -4px;
    position: absolute;
    }

/* 装飾 */

ul {
    list-style-type: none;
    margin: 5px;
}

li {
    font-size: 13px;
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    position:relative;
    padding: 4px;
}

mark{
    background-color: #e6c8a9;
}

/* メディアクエリ */
    
@media screen and (max-width:758px){

*{margin: ; padding: 0;}

body{
    margin: 5% 0;
}

article{
    width: 350px;
    margin: 5% auto;
}

.menu_box{
    -ms-writing-mode: tb-rl;
    writing-mode: vertical-rl;
    text-align: left;
    width: 360px;
    height: 580px;
    overflow: scroll;
    }

.menu{
    font-size: 18px;
    line-height: 1.5;
    color: #505050;
    margin-top: 50px;
    }

.wrap{
    position: relative;
    display: inline-block;
    }
    
    .box{
    width: 32px;
    height: 400px;
    background-color: #b8c0ba;
    clip-path: polygon(0 10%, 100% 0%, 100% 90%, 0 100%);
    }

ul {
    list-style-type: none;
    margin: 5px;
    margin-top: 50px;
    }
}

HTML

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