.main-blk {
    display: flex;
}
.left-txt {
    position: relative;
    width: 45%;
    padding-right: 5%;
}
.left-txt h2{
position: -webkit-sticky; /* ←必要なもの */
position: sticky; /* ←必要なもの */
top: 40px;
right: 0;
    color: #ee7800;
    font-weight: bold;
    font-size: 45px;
    line-height: 1.3;
}
.right-txt p {
    margin-bottom: 40px;
}
.right-txt .name {
    text-align: right;
}
@media screen and (max-width:860px){
.main-blk {
    display: inherit;
}
.left-txt {

    width: 100%;
    padding-right:0%;
    margin-bottom: 40px;
}
.left-txt h2{
position:static !important;
}
}
@media screen and (max-width:480px){
br.sp-none {
    display: none;
}
.left-txt h2 {
    font-size: 26px;
    margin-top: 40px;
}
.left-txt {
  margin-bottom: 30px;
}
.right-txt p {
    margin-bottom: 30px;
}
}