@media (min-width: 992px) {
	#main-nav .navbar-nav .nav-item .dropdown-menu {
		margin-top: 20px;
		transition: 0.2s ease 0s;
		display: block !important;
		opacity: 0;
		visibility: hidden;
		pointer-events: none;
	}
	#main-nav .navbar-nav .nav-item:hover .dropdown-menu {
		margin-top: 0;
		opacity: 1;
		visibility: visible;
		pointer-events: all;
	}
}

@media (max-width: 991px) {
	#main-nav > .container {
		padding-left: 15px;
		padding-right: 15px;
	}
	.navbar-collapse {
		position: fixed;
		left: 0;
		width: 100%;
		background: #fff;
		z-index: 9999;
	}
	#main-nav .navbar-nav .nav-item:before {
		content: none;
	}
	#main-nav .navbar-nav .nav-item .nav-link,
	#main-nav .navbar-nav .nav-item.active .nav-link,
	#main-nav .navbar-nav .nav-item:hover .nav-link {
		color: #222 !important;
		border-bottom: solid 1px #eee;
		padding: 10px 15px;
	}
	.nav-top .right {
		display: none;
	}
	.nav-top .left {
		width: 100%;
		justify-content: center;
	}
	.slider-bottom {
		margin-top: 50px;
	}
	.main-service-item {
		margin-bottom: 60px;
		height: auto;
		box-shadow: none;
		border: solid 1px #ddd;
	}
	[class*="col-"]:last-child .main-service-item {
		margin: 0;
	}
	.main-contact-form {
		padding-bottom: 20px;
	}
	
	.main-about-img {
		margin-bottom: 20px;
	}
	.main-about-desc {
		display: flex;
		justify-content: flex-start;
		align-items: center;
		flex-direction: column;
	}
	footer {
		padding-bottom: 48px;
	}
	.main-service-item:hover {
		transform: none;
	}
    #main-nav .navbar-nav {
        border-bottom: solid 1px #ddd;
    }
    #main-nav .navbar-nav .nav-item .nav-link {
        border: none;
    }
    .navbar-toggler {
        width: 55px;
        height: 55px;
    }
}

@media (max-width: 575px) {
	.nav-top .nt-contact i {
		min-width: 20px;
		width: 24px;
		height: 24px;
		font-size: 12px;
		line-height: 18px;
		margin-right: 5px;
	}
	.nav-top .nt-contact span {
		font-size: 12px;
		line-height: 18px;
	}
	.nav-top .nt-contact {
		margin-right: 10px;
	}
	.main-banner {
		padding-top: calc(1000/1920*100%);
	}
	.main-social a {
		min-width: 40px;
		width: 40px;
		height: 40px;
		font-size: 18px;
		margin: 0 5px;
		margin-bottom: 10px;
		line-height: 24px;
	}
	.captcha-box {
		flex-direction: column;
		justify-content: flex-start;
		align-items: center;
	}
	.captcha-box .main-btn {
		width: 100%;
		display: flex;
	}
	.captcha-box .g-recaptcha {
		margin-bottom: 20px;
	}
    .navbar-toggler  {
        margin-right: -15px;
    }
}