.intro-txt {
    width: 650px;
    margin: 0;
}
.intro-img {
    width: 470px;
}
.intro-img img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.guest-item a {
    display: inline-block;
    width: 90px;
    line-height: 1.8;
    color: #666666;
    font-size: 14px;
    text-align: center;
    background: #fff;
    border-radius: 2px;
    margin-top: 5px;
}
.guest-item a:hover {
    color: #0072df;
}
.picture-link a {
    cursor: pointer;
    width: 180px;
    height: 50px;
    line-height: 50px;
    color: #ffffff;
    text-align: center;
    background: linear-gradient(180deg, #3a9eff 0%, #0072df 100%);
    box-shadow: 0px 3px 20px rgba(68, 118, 248, 0.1);
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    -ms-border-radius: 5px;
    -o-border-radius: 5px;
}
@media (max-width: 750px) {
    .intro-txt {
        width: 100%;
        margin-top: 20px;
    }
    .picture-item {
        width: 48%;
        margin-bottom: 4%;
    }
    .guest-item a {
        width: 100%;
    }
}