.section-body{
    display: flex;
    justify-content: space-around;
    width: 1200px;
    margin: 20px auto;
}
.video{
    width: 65%;
    float: left;
}
.introduction{
    width: 35%;
    float: left;
    font-size: 22px;
    line-height: 130%;
    text-align: left;
    margin-top: 50px;
    font-family: "Times New Roman";
}
.height-introduction{
    color: red;
    text-decoration: none;
}
.footer-body{
    justify-content: space-around;
    width: 1000px;
    margin: 100px auto;
}
.paper-label{
    font-size: 25px; font-weight: bold;height: 30px; margin-top: 40px
}
.user-message{
    justify-content: space-between;
    display: flex;
    align-items: center;
}
p{
    text-align: center;
    margin-bottom: 10px;
}