.carousel-inner .item a:focus,
.carousel-indicators li:focus {
    outline: 3px solid #0056b3 !important;
    outline-offset: 2px;
}

.video-thumb-tax {
    background-image: url('https://i.ytimg.com/vi/7jxDI_fIFvM/hqdefault.jpg');
}

/* 確保 lite-youtube 填滿 Bootstrap 的容器 */
lite-youtube {
    max-width: 100%;
}