* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.scr .o {
    width: 40px;
    height: 40px;
    position: fixed;
    z-index: 2;
    left: 50%;
    transform: translateX(-50%);
    top: 6px;
}

.lab-box {
    text-align: center;
    height: 500px;
    margin-top: 100px;
    overflow: hidden;
}
.scr .o img {
    width: 100%;
}

.top-box .left-box img {
    height: 3rem;
    margin-top: 4px;
}

.large-box {
    padding: 0 10px;
}

.top-box {
    background: #ffffff;
    box-shadow: 0 0 10px 6px #d1cd9f;
    position: fixed;
    z-index: 1;
    width: 100%;
}

.top-main-box {
    display: flex;
    padding: 0 50px;
    justify-content: space-between;
    width: 80%;
    margin: 0 auto;
}


.top-box .right-box ul {
    display: flex;
    list-style-type: none;
}

.top-box .right-box li {
    margin: 10px;
}

.top-box .right-box a {
    font-weight: bold;
    line-height: 36px;
    font-size: 16px;
    color: #4f340f;
    text-decoration: none;
}

.top-box .right-box a:hover {
    opacity: .8;
}

.main-box {
    width: 50%;
    background: #feffdf;
    padding: 20px;
    margin: 100px auto;
    border-radius: 6px;
}

.main-box table {
    text-align: center;
    width: 100%;
    margin: 0 auto;
}

.main-box table tr {
    height: 50px;
    transition: .2s;
}

.main-box table tr:hover {
    background: #f4f6d5;
}

.main-box table td {
    font-size: 20px;
}
.bottom-box {
    background: #111111;
    height: 100px;
}

.bottom-box .box {
    text-align: center;
    padding: 10px;
    color: #ffffff;
}

.bottom-box p {
    line-height: 2;
}

.bottom-box span {
    color: #c8c8c8;
    line-height: 2;
}