@charset "utf-8";
.sec_submain .imtlist1 {
    width: 100%;
    overflow: hidden;
    /* 移除固定高度，使用宽高比或自适应 */
    position: relative;
}

.sec_submain .imtlist1::before {
    content: "";
    display: block;
    padding-top: 56.25%; /* 16:9 宽高比，可根据需要调整 */
}

.sec_submain .imtlist1 img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}


@media screen and (max-width:767.9px) {
	.sec_submain .imtlist1::before {
		display:none;
	}
  .sec_submain .imtlist1 img {
    position: relative;
	}
}