@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;
	}
}

.navBotc .nbl{flex-basis: 45%;}
.navBotc .nbr{flex-basis: 55%;padding-left: 3%;}
.submenu-box .nbr-c{width: calc(100% - 200px);}
.nbrc-nav{width: 50% !important;}
.nbrc-nav .nvrc-four{position: absolute;top: 0;left: 100%;z-index: 100;width: 100%;}
.nbrc-nav .nvrc-four li{width: 100%;line-height: 1.3;margin-bottom: 10px;min-height: auto !important;}

.navBotc .nbr .nbr-c ul li:hover>.nvrc-four{display: block;}
.navBotc .nbr .nbr-c ul li:hover>.nvrc-four li{display: block !important;}
.sdropdown-menu-four{display: none;}
.sdropdown-menu-four li{padding-left: 1rem;}