* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
}

body {
    font-family: "Arial", sans-serif;
    text-align: center;
    background-color: #f8f8f8;
    margin: auto;
}

.flex {
    display: flex;
    margin-bottom: auto;
}

.space-between {
    justify-content: space-between;
}

.a-center {
    align-items: center;
}

.j-center {
    justify-content: center;
}

.m-b-10 {
    margin-bottom: 10px;
}

.m-b-20 {
    margin-bottom: 20px;
}

.m-b-30 {
    margin-bottom: 30px;
}

.m-b-50 {
    margin-bottom: 50px;
}

.pointer {
    cursor: pointer;
}

.left_pre {
    white-space: pre-line;
    text-align: left;
}

.flex-wrap {
    flex-wrap: wrap;
}

header {
    width: 100%;
    margin: auto;
    max-width: 768px;
    height: auto;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 50px;
    position: relative;
}

header i {
    font-size: 20px;
    cursor: pointer;
}

footer {
    background-color: #e0e1e2;
    max-width: 768px;
    width: 100%;
    margin: auto;
    padding: 20px 30px;
    color: #54575a;
    text-align: left;
    font-size: 14px;
}

footer a {
    color: #54575a;
}

.middle_area {
    margin-top: 10px;
    padding-top: 20px;
    padding-bottom: 15px;
    border-top: 1px solid #c5c8cb;
    font-size: 14px;
    line-height: 23px;
}
.middle_area .corporation_info {
    margin: 0;
    font-size: 14px;
    line-height: 23px;
    word-break: keep-all;
}
.middle_area .address {
    font-style: normal;
}
.middle_area .biz_info {
    margin-top: 14px;
}

.list_link {
    cursor: pointer;
    display: flex;
    padding-top: 10px;
    gap: 5px;
    padding-bottom: 10px;
}

.list_link .item_link {
    font-weight: 700;
    width: 50%;
    color: #4d5053;
}

.copyright {
    text-align: center;
}

header img {
    width: 50%;
}