[mn="4300"] .itm .l {
    flex: 0 0 35px;
    max-width: 35px;
}

[mn="4300"] .itm .r {
    flex: 0 0 calc(100% - 35px);
    max-width: calc(100% - 35px);
    padding-left: 12px;
    overflow-wrap: break-word;
} 

[mn="4300"] .itm:nth-child(1) {
    flex: 0 0 55%;
    max-width: 55%; 
}
[mn="4300"] .itm:nth-child(2) {
    flex: 0 0 45%;
    max-width: 45%; 
}

[mn="4300"] ._secttlbx {
    text-align: inherit;
}
[mn="4300"] .h4._secttl {
    font-size: 150%;
    color: var(--clr01);
}
[mn="4300"] .ttl {
    font-size: 120%;
    font-family: var(--ft-t2);
    line-height: 1;
    margin-bottom: 9px;
    color: #000;
}

[mn="4300"] .listbx {
    padding: 30px;
    border: 2px solid #ccc
}
[mn="4300"] .itms {
    margin: 0 -15px
}
[mn="4300"] .itms+.itms {
    margin-top: 21px
}

[mn="4300"] .itm {
    padding: 0 15px
}
[mn="4300"] .itm iframe {
    width: 100%;
    height: 250px
}

[mn="4300"] .itm .l .bimg-w {
    margin-bottom: 15px;
    margin-top: -9px
}
[mn="4300"] ol {
    padding: 0;
    list-style: none;
    list-style-type: none;
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}
[mn="4300"] ol > li {
    flex: 0 0 50%;
    max-width: 50%;
}
[mn="4300"] ._link { 
    text-align: right;
    margin: 15px 0 0;
} 
[mn="4300"] ._content a { 
    display: inline-block;
}
[mn="4300"] ._content li > img { 
    max-width: calc(100% - 15px);
}
@media only screen and (max-width: 767px) { 
    [mn="4300"] .itm:nth-child(1),
    [mn="4300"] .itm:nth-child(2) { 
        flex: 0 0 100%;
        max-width: 100%;
    }
    [mn="4300"] ol > li {
        flex: 0 0 100%;
        max-width: 100%;
    }

    [mn="4300"] .itm>div { 
        max-width: 100%; 
    }
}