.topic-details-b {
    padding: 40px 20px 40px;
}

body .topic-details-b__ttl {
    font-size: 22px;
    background-color: #FFFF00;
    padding: 3px 5px;
    text-align: center;
    color: #187DAE;
    font-weight: 500;
    margin: 0 auto;
    margin-bottom: 20px;
    display: inline-block;

}

.topic-details-b__subttl {
    padding: 3px 5px;
    font-size: 18px;
    text-align: center;
    display: inline-block;
}

.topic-details-b__content01__img{
    margin-top: 30px;
}

.topic-details-b__content01__txt{
    line-height: 1.5;
    text-align: left;
    margin-top: 20px;
}

.topic-details-b__content02__wrap{
    margin-top: 20px;
}

.topic-details-b__content02__img__wrap>img{
    margin-bottom: 20px;
}

body .topic-details-b__subttl02{
    text-align: center;
    line-height: 2;
}

.txtcolor-r{
    color: red;
}
.txtcolor-b{
    color: rgb(0, 195, 255);
}

.topic-details-b__txt02{
    font-size: 20px;
    margin-top: 20px;
    display: inline;
  
}
.txt-bg-y{
    background-color: yellow;
}

body .txtcolor-bl{
    color: #000;
}



@media screen and (min-width: 768px) {
    .topic-details-b {
        padding: 60px 0 60px;
    }

    body .topic-details-b__ttl {
        font-size: 32px;
        background-color: #FFFF00;
        padding: 3px 5px;
        text-align: center;
        color: #187DAE;
        font-weight: 500;
        margin: 0 auto;
        margin-bottom: 40px;
        display: inline-block;

    }

    .topic-details-b__subttl {
        padding: 3px 5px;
        font-size: 24px;
        text-align: center;
        display: inline-block;
    }

    .topic-details-b__content01__img{
        margin-top: 40px;
    }
    
    .topic-details-b__content01__txt{
        line-height: 1.5;
        text-align: left;
        margin-top: 20px;
    }
    
    .topic-details-b__content02__wrap{
        margin-top: 20px;
    }

    .topic-details-b__content02__img__wrap{
        display: flex;
    }
    
    .topic-details-b__content02__img__wrap>img{
        margin-bottom: 20px;
        width: calc((100% - 20px)/2);
    }

    .topic-details-b__content02__img02{
        margin-left: 20px;
    }

    .topic-details-b__txt02{
        font-size: 28px;
        margin-top: 20px;
       
    }

    body .txtcolor-bl{
        color: #000;
    }
}