html {
    font-size: 14px;
}
body{
    font-family: "Helvetica Neue",Helvetica,"PingFang SC","Microsoft YaHei",Tahoma,Arial;
    background: #f4f6f8;

}
body {
    -webkit-font-smoothing: antialiased;
    -webkit-font-variant-ligatures: no-common-ligatures;
    font-variant-ligatures: no-common-ligatures;
    margin:0
}
@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

nav .nav-link{
    font-size: 16px;
    word-break: break-all;
    padding:0 22px !important;
    color: #fff !important;
}
nav .navbar-brand{
    color: #fff;
}
.navbar-brand img{
    width: 40px;
    height: 40px;
}
.navbar-shadow {
    box-shadow: 0 4px 8px 0 rgb(0 0 0 / 6%);
    background-color: #fff;
}
.navbar-shadow .navbar-nav .nav-link{
    color: #1f2329 !important;
}
.navbar-shadow .navbar-brand{
    color: #1f2329;
}

#about {
    background-color: #2c79c5;
    text-align: center;
    min-height: 350px;
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background-image: linear-gradient(rgba(54, 63, 72, 0.5), rgba(54, 63, 72, 0.5)), url(/static/images/index.jpg);
    background-size: cover;
    background-attachment: fixed;
}
#about h1 {
    font-weight: 400;
    font-size: 4em;
    color: #fff;
    line-height: 100%;
}
#about h2 {
    color: #fff;
    font-weight: 400;
    font-size: 2em;
    line-height: 68px;
}
#about .links {
    margin-top: 30px;
}
#about .links a {
    margin: 0 5px;
}

#about .btn{
    border-radius: 23px;
    width: 140px;
    height: 46px;
    border: none;
    color: white;
    font-size: 14px;
    line-height: 35px;
}

.section {
    padding: 50px 0;
}
.section .subtitle {
    line-height: 60px;
}

.lead{
    font-size: 16px;
    -webkit-font-smoothing:subpixel-antialiased;
}
.feature-section {
    margin-top: 40px;
    background-color: #f4f6f8;
}
.feature-section img{
    width: 60px;
    margin: 30px 0px;
}

@media (max-width:750px) {
    .section-example {
        height: 960px; padding-top: 20px;
    }
    .section-example img {
        width: 360px;
    }
    .section-service{
        height: 900px;padding-top: 20px;
    }
    .section-service img {
        width: 200px;
    }
    .section-contact {
        height: 550px;
    }
}

@media screen and (min-width: 767px) and (max-width: 960px){
    .section-example {
        height: 1400px; padding-top: 20px;
    }
    .section-example img {
        width: 700px;
    }
    .section-service{
        height: 900px;padding-top: 20px;
    }
    .section-service img {
        width: 260px;
    }
    .section-contact {
        height: 500px;
    }
}

@media (min-width: 960px) {
    .section-example {
        height: 1200px; padding-top: 20px;
    }
    .section-example img {
        width: 700px;
    }

    .section-service{
        height: 1000px;padding-top: 20px;
    }
    .section-service img {
        width: 360px;
    }

    .section-contact {
        height: 380px;
    }
}