.leadbox {
    padding-top:60px;
}

.leadbox p {
    width: 776px;
    border-radius: 10px;
    background: #fff3dc;
    margin: 0 auto;
    padding: 80px 0;
    font-family: "Zen Kaku Gothic New";
    font-weight: 500;
    font-size: 17px;
    letter-spacing: 0.1em;
    line-height: 38px;
    text-align: center;
    color: #2f9ea5;
    box-sizing: border-box;
}

dl.history {
    margin-top: 60px;
    display: flex;
    flex-wrap: wrap;
    padding: 0 40px;
    position: relative;
}

dl.history dt {width: 82px;height: 40px;border-radius: 10px;background: #3ca4ab;font-family: "Zen Kaku Gothic New";font-weight: 500;font-size: 22px;letter-spacing: 0.15em;text-align: center;color: #fff;box-sizing: border-box;padding-top: 3px;margin-top: 22px;z-index: 3;}

dl.history dd {
    font-family: "Zen Kaku Gothic New";
    font-weight: 500;
    font-size: 16px;
    letter-spacing: 0.1em;
    text-align: left;
    color: #000;
    width: 680px;
    border-bottom: 1px dotted #9FCDD1;
    padding: 20px 0;
    box-sizing: border-box;
}

dl.history dd:last-child {
    border-bottom: none;
}

dl.history:before {
    display: block;
    content: "";
    width: 5px;
    position: absolute;
    height: calc(100% - 54px);
    background-color: #3CA4AB;
    left: 78px;
    top: 23px;
    z-index: 1;
}

@media (max-width:600px){

.leadbox {
    padding-top: 50px;
}

.leadbox p {
    width: 100%;
    padding: 35px 30px;
    font-family: "Zen Kaku Gothic New";
    font-weight: bold;
    font-size: 14px;
    letter-spacing: 0.1em;
    line-height: 21px;
    text-align: left;
    color: #2f9ea5;
}

dl.history {
    width: 100%;
    padding: 0;
    margin-top: 30px;
}

dl.history dt {
    width: 45px;
    height: 25px;
    border-radius: 10px;
    background: #3ca4ab;
    font-family: "Zen Kaku Gothic New";
    font-weight: 500;
    font-size: 13px;
    letter-spacing: 0.15em;
    text-align: center;
    color: #fff;
    margin-top: 10px;
}

dl.history dd {
    width: calc(100% - 55px);
    margin-left: 10PX;
    padding: 10px 0;
    font-family: "Zen Kaku Gothic New";
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.1em;
    text-align: left;
    color: #000;
}

dl.history:before {
    width: 3px;
    height: calc(100% - 73px);
    left: 21px;
}
}