/* 移动端样式 */
header {
    display: none !important;
}

.container {
    flex-direction: column;
}

.container nav {
    display: none;
}

.container main {
    width: 100%;
    padding: 15px;
}

/* 调整图片和视频大小 */
img, video {
    max-width: 100% !important;
    height: auto !important;
}

.help-section {
    margin-bottom: 20px;
}