.article-nav {
    position: absolute;
    left: 0;
    top: unset;
    padding: 0;
    width: 100%;
    z-index: 10;
    transition: opacity 0.25s;
    opacity: 0;
}
#navList {
    margin-top: 0;
    padding: 1rem 2rem 8rem;
    background-color: #EEE;
    overflow-y: scroll;
    overflow-x: hidden;
    display: none;
}
#navList.show {
    display: block;
}
.article-nav h3.article-nav-title {
    display: flex;
    font-weight: 500;
    background-color: #CCC;
    color: #FFF;
    margin: 0 auto;
    padding: 0 3rem 0 1rem;
    height: 50px;
    line-height: 50px;
}
.article-nav .article-nav-title::before {
    content: "+";
    padding: 0 0.7rem 0 0;
    font-weight: 400;
    width: 20px;
    text-align: center;
}
.article-nav .article-nav-title.open::before {
    content: "-";
    padding: 0 1.2rem 0 0;
}
.article-nav ul {
    list-style: none;
    margin: 1rem -5px 3rem;
    padding: 0;
    font-size: 1.8rem;
    background-color: #FFF;
}
.article-nav ul li {
    font-size: 1.5rem;
    margin: 2rem auto 1rem;
}
.article-nav ul li a {
    color: #666;
    text-decoration: none;
    margin: 1rem auto
}
.article-nav ul li.active a {
    font-weight: 700;
    color: #0068ad;
}
.article-nav ul li.H2link {
    font-size: 2.0125rem;
    margin: 1rem auto;
    padding: 0.5rem 0;
}
.article-nav ul li.H2link a {
    margin: 1rem auto;
}
.article-nav ul li.H2link.active {
    font-size: 1.9rem;
    line-height: 130%;
    letter-spacing: 0.3px;
}
.article-nav ul li.H3link {
    font-size: 1.8rem;
    line-height: 130%;
    margin: 1rem auto;
    padding: 0 0 1rem 3rem;
}
.article-nav ul li.H3link.active {
    font-size: 1.8rem;
    line-height: 136%;
}
.article-nav ul li.H3link:before {
    content: "- ";
    margin-left: -1rem;
}
@media (min-width: 992px) {
    #navList,
    .article-nav h3.article-nav-title:hover {
        background-color: transparent;
    }
    .article-nav {
        position: fixed;
        right: unset;
        width: 260px;
        margin-top: 1rem;
        padding-left: 2rem;
    }
    #navList {
        display: block;
        overflow: hidden;
        padding: 1rem 0 2rem;
    }
    .article-nav h3.article-nav-title {
        display: block;
        margin: 0;
        padding-bottom: 2rem;
        padding-left: 0;
        font-size: 2rem;
        background-color: transparent;
        border-bottom: 1px solid #CCC;
        color: #0060A7;
     }
     .article-nav .article-nav-title::before {
        content: "";
        padding: 0;
        width: 0;
    }
    .article-nav ul {
        list-style: none;
        margin: 1rem auto 3rem;
        padding: 0;
        font-size: 1.8rem;
        background-color: #FFF;
    }
    .article-nav ul li.H2link {
        font-size: 1.5rem;
        line-height: 1.8rem;
        letter-spacing: 0.4px;
        margin: 0 auto;
        padding: 0.75rem 0;
    }
    .article-nav ul li.H2link + .H3link {
        margin-top: 0;
    }
    .article-nav ul li.H2link.active {
        font-size: 1.4rem;
        line-height: 1.8rem;
        letter-spacing: -0.1px;
        margin: 0 auto;
    }
    .article-nav ul li.H3link {
        font-size: 1.5rem;
        line-height: 1.8rem;
        letter-spacing: 0.4px;
        margin-bottom: 1rem;
        padding: 0 1rem 0 3rem;
    }
    .article-nav ul li.H3link.active {
        font-size: 1.4rem;
        line-height: 1.8rem;
        letter-spacing: 0;
    }
    .article-nav ul li.H3link + .H2link {
        margin-top: 0;
        padding-top: 0.5rem;
    }
}
@media (min-width:1200px) {
    .article-nav {
        width: 280px;
        padding-left: 3rem;
    }
}
@media (min-width:1260px) {
    .article-nav {
        width: 300px;
        padding-left: 3rem;
    }
}
@media (min-width:1360px) {
    .article-nav {
        width: 320px;
        padding-left: 4rem;
    }
}
@media (min-width:1460px) {
    .article-nav {
        width: 380px;
        padding-left: 5rem;
    }
}
@media (min-width:1600px) {
    .article-nav {
        width: 450px;
        padding-left: 7rem;
    }
}

.article-nav.sticky-start {
    transition: opacity 0.25s;
    opacity: 1;
    position: fixed;
    border-top: 0;
    z-index: 9999;
    top: 0;
}
.article-nav.sticky-end {
    transition: opacity 0s;
    opacity: 0;
}