.list1:not(:first-child) {
    margin-top: 10px;
 　 text-align:center;
}

.title1 {
    background: #F2F8FF;
    cursor: pointer;
    font-size: 18px;
    padding: 20px 30px;
    position: relative;
    font-family: "ヒラギノ角ゴ Pro W5", "Hiragino Kaku Gothic Pro", "Meiryo UI", "Hiragino Sans", "Yu Gothic UI", "MS PGothic", "Hiragino Kaku Gothic ProN", "sans-serif";
     font-weight:700
}

.title1:before {
    position: absolute;
    content: '';
    top: 50%;
    right: 25px;
    height: 2px;
    width: 15px;
    background: #2B334F;
    transform: rotate(90deg);
    transition: all .3s ease-in-out;
}

.title1:after {
    position: absolute;
    content: '';
    top: 50%;
    right: 25px;
    height: 2px;
    width: 15px;
    background: #2B334F;
    transition: all .3s ease-in-out;
}

.title1.open:before {
    transform: rotate(180deg);
}

.title1.open:after {
    opacity: 0;
}

.box_answer1 {
    color: #000000;
  font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "Meiryo UI", "Hiragino Sans", "Yu Gothic UI", "MS PGothic", "Hiragino Kaku Gothic ProN", "sans-serif";
    background: #F2F8FF;
    display: none;
    padding: 20px 30px;
}