* {
    padding: 0;
    margin: 0;
    list-style: none;
    box-sizing: border-box;
}
body {
    width: 100%;
    height: 100vh;
    background-color: #efefef;
    font-size: 1rem;
}

.banner {
    width: 100%;
    overflow: hidden;
    min-height: 340px;
    background: url(../images/banner-bg.jpg) no-repeat center;
    background-size: cover;
}
.banner h1 {
    color: #2a8df8;
    margin-top: 130px;
}

.img-fluid {
    display: block;
    width: 100%;
}
.container {
    width: 1200px;
    margin: 0 auto;
}
.xx {
    width: 100%;
    margin-top: -130px;
}
.xx-box {
    width: 100%;
    display: flex;
    justify-content: space-between;
    z-index: 9999 !important;
    padding: 2rem 0;
    flex-wrap: wrap;
    overflow: hidden;
}
.xx-item {
    width: 32.33%;
    background-color: #ffffff;
    box-shadow: rgba(100, 100, 111, 0.2) 0 7px 29px 0;
    text-align: center;
    overflow: hidden;
    padding: 2rem;
}
.xx-item h3 {
    margin-top: 1rem;
}
.xx-item p {
    color: #888888;
    font-size: .85rem;
}
.xx-item img {
    display: block;
    width: 60px;
    margin: 0 auto;
}
.xx-item a {
    display: block;
    width: 180px;
    height: 40px;
    border-radius: 20px;
    border: 1px solid #d5d5d5;
    line-height: 40px;
    margin: 1rem auto 0;
    text-decoration: none;
    color: #333;
}
.footer {
    width: 100%;
    min-height: 250px;
    background: url("../images/banner.png") no-repeat center;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
.footer img {
    display: block;
    width: 300px;
}
.footer-box {
    width: 100%;
    overflow: hidden;
}
.footer a {
    display: block;
    width: 180px;
    height: 40px;
    border-radius: 20px;
    color: #ffffff;
    line-height: 40px;
    text-align: center;
    text-decoration: none;
    background-color: #2a8df8;
    margin-top: 1rem;
}
@media (max-width: 768px) {
    .container {
        width: 100%;
    }
    .banner {
        min-height: 200px;
    }
    .banner h1 {
        text-align: center;
        margin-top: 100px;
    }
    .xx-item {
        width: 100%;
    }
    .xx {
        margin-top: 0;
    }
    .xx-box {
        margin-top: 0;
        padding: 0;
    }
    .footer {
        flex-wrap: wrap;
        padding: 1rem;
    }
    .footer img {
        width: 100%;
    }
}