[up主专用，视频内嵌代码贴在这]
.video-container {
position: relative;
width: 100%;
padding-top: 56.25%; /* 16:9 aspect ratio (height/width = 9/16 * 100%) */
}
.video-container iframe {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
