.main {
    padding: 0;
    font-family: 微软雅黑;
}
.row {
    margin: 0;
}
.col {
    margin: 0;
    padding: 0;
}
.header {
    font-size: 1.8rem;
}
.header .logo {
    width: 260px;
}
.nav-item {
    width: 150px;
}
.navbar-toggler {
    font-size: 3rem;
}
@media (max-width: 992px) {
    .navbar-collapse {
        background-color: #f9f9f9;
        border-radius: 6px;
        width: 90%;
        right: 5%;
        top: 76px;
        position: absolute;
        padding: 10px;
        line-height: 5rem;
        font-size: 3rem;
    }
    .nav-item {
        width: 100%;
        text-align: center;
    }
}

.main-desc .main-desc-warp {
	left: 9%;
	padding-bottom: 9%;
	padding-top: 9%;
	width: 43%;
}

@media screen and (max-wdith: 750px) {
	.main-desc .main-desc-warp.main-desc-wrap3 {
		left: 15%;
		padding-top: 6%;
		padding-bottom: 10%;
	}
}

/* 文案标题 */
.desc-title {
	font-size: 1.5rem;
	font-weight: bold;
	white-space: nowrap;
}

/* 文案副标题 */
.desc-sub-title {
	margin-top: 1.5rem;
	font-size: 1.4rem;
	font-weight: 500;
}

/* 文案描述 */
.desc-text {
	margin-top: 1.2rem;
	font-size: 1.2rem;
	color: #808080
}

footer {
    position: relative;
    height: 80px;
    text-align: center;
    color: #222222;
    background-color: #2b2b2b;
}
footer .text {
    position: absolute;
    bottom: 25px;
    width: 100%;
    color: #d2d2d2
}

.footer-title {
	margin-bottom: 1.4rem;
	font-size: 1.4rem;
	font-weight: 500;
}

.footer-subtitle {
	font-size: 1.4rem;
	line-height: 1.5;
}