body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0px;
    padding: 0px;
}

.header-top {
    background-color: white;
    border: 2px solid steelblue;
    top: 0;
    justify-content: center;
    align-items: center;
    font-size: 14px;
    z-index: 2;
}

.header-top .hotline {
    color: red;
    font-weight: bold;
}

.header-main {
    text-align: center;
    padding: 60px 0px;
}

a {
    text-decoration: none;
}

.nav-link {
    color: steelblue;
    font-weight: bold;
}

.section {
    margin-top: 50px;
    margin-bottom: 50px;
}

.section-title {
    text-align: left;
    color: steelblue;
    font-weight: bold;
}