@media (max-width:991px) {
    body.poster {
        margin-top: 60vh;
    }
}

body.poster {
    background-attachment: fixed;
}

.top-5 {
    top: 5px;
}

/* test button circle */
/* https://codepen.io/kathykato/details/rZRaNe */
.top_btn {
    float: right;
    position: fixed;
    bottom: 20px;
    right: 10px;

    /* display: inline-block; */
    width: 3rem;
    height: auto;
    cursor: pointer;
    outline: none;
    border: 0;
    vertical-align: middle;
    text-decoration: none;
    background: transparent;
    padding: 0;
    font-size: inherit;
    font-family: inherit;
}

.top_btn .circle {
    transition: all 0.45s cubic-bezier(0.65, 0, 0.076, 1);
    position: relative;
    display: block;
    margin: 0;
    width: 3rem;
    height: 3rem;
    background: #6f74bd;
    border-radius: 1.625rem;
}

.top_btn .circle:hover {
    background: #989bc4;
}

.top_btn .circle .icon {
    transition: all 0.45s cubic-bezier(0.65, 0, 0.076, 1);
    position: absolute;
    top: 0.35rem;
    bottom: 0;
    margin: auto;
    background: #fff;
}

.top_btn .circle .icon.arrow {
    transition: all 0.45s cubic-bezier(0.65, 0, 0.076, 1);
    left: 0.725rem;
    width: 1.125rem;
    height: 0.125rem;
    background: none;
}

.top_btn .circle .icon.arrow::before {
    position: absolute;
    content: '';
    top: -0.25rem;
    right: 0.0625rem;
    width: 0.625rem;
    height: 0.625rem;
    border-top: 0.125rem solid #fff;
    border-right: 0.125rem solid #fff;
    transform: rotate(-45deg);
}

.std_txt {
    text-align: left;
    hyphens: auto;
    hyphenate-limit-chars: auto 5;
    hyphenate-limit-lines: 2;
}

.ul_li {
    margin-left: 1.5em;
    text-indent: -10px;
    margin-bottom: 0em;
}

p {
    hyphens: auto;
}