h1.midashi {
padding: 0.25em 0.5em;/*上下 左右の余白*/
color: #494949;/*文字色*/
background: transparent;/*背景透明に*/
border-left: solid 5px #7db4e6;/*左線*/
}

h2 {
color: #6594e0;/*文字色*/
border-bottom: dashed 2px #6594e0;
/*線の種類（点線）2px 線色*/
}

h3 {
border-bottom: solid 3px #cce4ff;
position: relative;
}

h3:after {
position: absolute;
content: " ";
display: block;
border-bottom: solid 3px #5472cd;
bottom: -3px;
width: 20%;
}

h4 {
padding: 0.25em 0.5em;/*上下 左右の余白*/
color: #494949;/*文字色*/
background: transparent;/*背景透明に*/
border-left: solid 5px #7db4e6;/*左線*/
}