html body{
    font-family: "微软雅黑", "黑体", "宋体", "Microsoft YaHei", "SimHei", "SimSun", "serif";
    --color-1:#0F5EB2;
    --color-2:#1978B5;
    --color-3:#FE6502;

}
/* 初始透明导航栏样式 */
#top-bar {
    background-color: transparent;
    transition: background-color 0.5s ease; /* 添加过渡效果，让颜色变化更平滑 */
}

/* 滚动后深色导航栏样式 */
#top-bar.scrolled {
    background-color: #061235; /* 这里设置为半透明黑色，可以根据需求调整颜色和透明度 */
}

/* 导航栏链接文字颜色等样式调整 */
#top-bar .nav-link {
    color: white;
    font-size: 1.1rem;
    font-weight: 500;
}
#top-bar .nav-link.active {
    color: orange;
}
#advantage{
    background:url("../images/bg-aboutus.png");
    color: white;
}
#advantage small{
    color: #ccc;
}
#services{
    background-color: #efefef;
}
#contactUs{
    background:url("../images/bg_contractus.png");
}
#aboutUs{
    background:url("../images/bg-aboutus.png");
}
#aboutUs p{
    text-indent: 32px;
    font-size: 0.875rem;
}
.bg-section1{
    background-color: #EEF2F9;
}
.bg-section2{
    background-color: #EEF2F9;
}
.carousel-caption h1{
    color: orange;
    text-shadow: 3px 3px 3px #000;
    font-weight: bold;
    font-size: 3rem;
}
.carousel-caption h4{
    color: white;
    text-shadow: 2px 2px 2px #000;
    font-weight: bold;
    font-size: 2rem;
}
.carousel-caption p{
    color: white;
    text-shadow: 2px 2px 2px #000;
    font-weight: bold;
    font-size: 1.2rem;
}
.card p{
    color: #666;
    font-size: 0.875rem;
    padding: 0.8rem;
}

.btn-primary {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--color-1);
    --bs-btn-border-color: var(--color-1);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--color-2);
    --bs-btn-hover-border-color: var(--color-2);
    --bs-btn-focus-shadow-rgb: 49, 132, 253;
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--color-2);
    --bs-btn-active-border-color: var(--color-2);
    --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
    --bs-btn-disabled-color: #fff;
    --bs-btn-disabled-bg: #0d6efd;
    --bs-btn-disabled-border-color: #0d6efd;
}
.container h3{
    /*font-weight: bold;*/
    color: var(--color-1);
}
.fixed-top{
    z-index: 999;
}
.icon{
    width: 4rem;
}
.iconfont{
    font-size: 3rem;
}