html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Serif TC', "Times New Roman", serif;
    background-image: url(../images/425189_bg_img.webp);
    background-attachment: fixed;
    background-size: cover;
    background-repeat: no-repeat;
    overflow-x: hidden;
    color: #231815;
    text-shadow: 1px 1px 0 #fff;
}

a {
    text-decoration: none;
}

.fs-18 {
    font-size: 1.125rem;
}

.fs-22 {
    font-size: 1.375rem;
}

.text-justify {
    text-align: justify;
}

.text-warning {
    color: #fff100 !important;
}

.text-info {
    color: #44b0d1 !important;
}

.text-brown {
    color: #734929;
}

.bg-warning-subtle {
    background-color: #fffbef !important;
}

.border-info {
    border-color: rgba(180, 201, 207, 0.3) !important;
}

.border-style-dashed {
    border-bottom-style: dashed !important;
}

.text-style-times {
    font-family: Georgia, "Times New Roman", Times, serif, "新細明體", "PMingLiU";
}

.social-icon .btn,
[href="#top"] {
    max-width: 80px;
}


.line {
    border-bottom: 1px dashed #929195;
    height: 1px;
}

img {
    transition: all 0.5s;
}

hr {
    opacity: 1;
}

h2,
header h4 {
    text-shadow: none;
}

main h2 {
    padding: 1rem 1rem calc(1rem + 10px);
    background: #fff462;
}

main h2:before {
    position: absolute;
    top: -7px;
    left: -7px;
    width: 100%;
    height: 100%;
    content: '';
    border: 2px solid #000;
    border-radius: 50rem;
}

@media (min-width:1200px) {

    .h2,
    h2 {
        font-size: 1.8rem;
    }

    .book-h {
        max-height: 235px;
    }

}

@media (max-width:991px) {
    header>div>.position-relative {
        position: static;
    }

    .offcanvas.offcanvas-top {
        height: 80vh;
    }

    hr {
        opacity: 1;
    }

}

@media (max-width:575px) {
    h2.display-5 {
        font-size: calc(1.425rem + 1.6vw);
    }

    .header-img {
        height: 735px !important;
    }

}