.qa_sec01 .contents{
    max-width: 1000px;
    margin: 0 auto;
    padding: 30px 20px 80px;
    box-sizing: border-box;
}
.qa_sec01 .contents h1{
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 10px;
}
.qa_sec01 .contents .bar{
    display: block;
    width: 100px;
    height: 1px;
    margin: 0 auto;
    background-color: #000;
}

.qa_sec01 .contents .ac_area {
    width: 100%;
    margin-top: 40px;
}
.qa_sec01 .contents .ac_area li {
    margin: 10px 0;
}
.qa_sec01 .contents .ac_area section {
    border: 1px solid #ccc;
}
.qa_sec01 .contents .title_btn {
    position: relative;
    cursor: pointer;
    font-size: 14px;
    line-height: 22px;
    font-weight: bold;
    background-color: #f3f3f3;
    padding: 20px 48px 20px 20px;
    transition: all 0.5s ease;
}
.qa_sec01 .contents .text_box {
    display: none;
    font-size: 12px;
    line-height: 20px;
    padding: 20px;
}
.qa_sec01 .contents .text_box p{
    font-family: sans-serif;
}
.qa_sec01 .contents .title_btn::after {
    content: "";
    position: absolute;
    top: 42%;
    right: 20px;
    width: 13px;
    height: 13px;
    border-top: 3px solid #333;
    border-right: 3px solid #333;
    transform: rotate(45deg);
    transition: all 0.3s;
}
.qa_sec01 .contents .title_btn.open::after {
    transform: rotate(135deg);
}


@media screen and (max-width:768px){
    .qa_sec01 .contents .title_btn {
        font-size: 12px;
    }
}