.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    background: #f1f1f1;
    padding: 12px 15px;
    margin: 0 0 15px 0;
    list-style: none;
    border-radius: 2px;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    color: #555;
}

    .breadcrumb-item + .breadcrumb-item::before {
        content: ">";
        padding: 0 8px;
        color: #999;
    }

    .breadcrumb-item a {
        color: #333;
        text-decoration: none;
    }

        .breadcrumb-item a:hover {
            text-decoration: none;
            color: #e53935;
        }

    .breadcrumb-item.active {
        color: #777;
    }

.journal-detail {
    width: 100%;
    margin: 30px auto;
}

.journal-header {
    display: flex;
    align-items: flex-start;
    gap: 40px;
}

.journal-left {
    width: 351px;
    flex-shrink: 0;
}

.cover-box {
    border: 1px solid #ddd;
    background: #fff;
    padding: 12px;
}

.cover-img {
    width: 100%;
    display: block;
}

.journal-info {
    margin-top: 20px;
}

.info-item {
    margin-bottom: 15px;
    font-size: 15px;
    color: #555;
    line-height: 24px;
    display: flex;
}

    .info-item b {
        display: block;
        color: #333;
        margin-bottom: 5px;
        margin-right: 5px;
    }

    .info-item a {
        color: #283593;
        text-decoration: none;
    }

        .info-item a:hover {
            text-decoration: underline;
            color: #e53935 !important;
        }

.journal-right {
    flex: 1;
}

.journal-title {
    font-size: 30px;
    font-weight: 300;
    color: #777;
    margin: 0 0 5px;
}

.paper-title {
    margin-top: 25px;
    margin-bottom: 0px;
    font-size: 30px;
    font-weight: 300;
    color: #777;
}

/* === Nút "Ảnh bìa / Bìa ngoài..." - màu đỏ thương hiệu TCNN === */
.journal-files {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn-file {
    display: inline-block;
    padding: 5px 14px;
    border: 1px solid #283593;
    color: #283593;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    transition: .3s;
}

    .btn-file:hover {
        border: 1px solid #fff;
        background: #e53935;
        color: #fff;
    }

.paper-item {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid #eee;
    padding-bottom: 20px;
    padding-top: 20px;
}

    .paper-item:first-child {
        border-top: none;
    }

.paper-content {
    flex: 1;
    padding-right: 20px;
}
    /* === Tiêu đề bài báo - màu đỏ thương hiệu TCNN === */
    .paper-content h3 {
        margin: 0;
        color: #283593;
        font-size: 21px;
        line-height: 1.6;
        font-weight: 600;
        text-transform: uppercase;
    }

        .paper-content h3 a {
            color: #283593;
            font-size: 15px;
            text-decoration: none;
        }

            .paper-content h3 a:hover {
                text-decoration: underline;
                color: #e53935;
            }

.paper-author {
    margin-top: 5px;
    font-size: 16px;
    color: #666;
    font-style: italic;
    line-height: 1.6;
}
/* === DOI - màu đỏ thương hiệu TCNN === */
.paper-doi {
    margin-top: 5px;
    font-size: 14px;
}

    .paper-doi a {
        color: #283593;
        text-decoration: none;
    }

        .paper-doi a:hover {
            text-decoration: underline;
            color: #e53935;
        }

.paper-download {
    width: 100px;
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    margin-top: 10px;
}

    /* === Nút PDF dạng khung bo viền, đỏ thương hiệu TCNN - giống nút btn-file === */
    .paper-download a.btn-pdf {
        display: inline-block;
        color: #283593;
        font-size: 14px;
        padding: 5px 14px;
        border: 1px solid #283593;
        border-radius: 4px;
        text-decoration: none;
        transition: .3s;
    }

        .paper-download a.btn-pdf:hover {
            border: 1px solid #fff;
            background: #e53935;
            color: #fff;
        }

.other-title {
    margin-top: 40px;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
    font-size: 28px;
    color: #666;
}


.cover-box-1 {
    background: #fff;
    padding: 4px;
    margin-top: 15px;
    text-align: center;
    border: 1px solid #283593;
    margin-left: 26px;
    width: 250px;
}
.impact-box {
    width: 220px;
    margin: 15px auto;
}

.impact-header {
    background: #0b6fb8;
    color: #fff;
    padding: 15px 10px;
    border: 2px solid #5aa7d9;
    font-size: 15px;
    line-height: 1.5;
    font-weight: 500;
}

.impact-body {
    border-top: none;
    background: #fff;
    padding: 12px 0px 0px 0px;
}

    .impact-body p {
        margin: 0px 0px 10px 0;
        font-size: 15px;
    }

    .impact-body strong {
        font-weight: bold;
    }