.body{
    background: #f1f3f5;
    padding-bottom: 3%;
}
.nav_box{
    background: #fff;
    margin-bottom: 30px;
}
.nav_wrap {
    padding: 12px 10px;
    overflow: hidden;
}
.nav_wrap .post-title {
    float: left;
    color: #000;
    font-size: 28px;
    line-height: 35px;
    font-weight: 600;
}
.nav_wrap .get-quote {
    cursor: pointer;
    color: #fff;
    padding: 5px 20px;
    float: right;
    background: #1a2f83;
}
/* Masonry & 图片样式 */
.masonry-grid {
    margin-left: -15px; /* 补偿左边距 */
    margin-right: -15px; /* 补偿右边距 */
}
.masonry-item {
    width: calc(25% - 30px); /* 每列减去左右间距 */
    list-style: none;
    float: left;
    margin: 0 10px 10px 10px; /* 左右 15px，底部 15px */
}
.masonry-item img {
    width: 100%;
    cursor: pointer;
    transition: transform 0.3s ease;
}
.masonry-item:hover img {
    transform: scale(1.05);
}
.bg-dark{
background: #fff;
}
.posts_form li {
	margin-bottom: 15px;
	width: 100%;
	background: #fff;
}

.posts_form li input {
	border: 1px solid #d2d2d2;
	padding: 10px 10px;
	width: 100%;
}

.posts_form li textarea {
	border: 1px solid #d2d2d2;
	padding: 10px 10px;
	width: 100%;
	height: 90px;
}

.posts_form .submit {
	padding: 10px 35px;
	background: #182d82;
	color: #fff;
}
@media(max-width: 750px){
    .masonry-item { width: calc(50% - 30px); }
}