/* 全局样式 */
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}
body{
    font-family:"Microsoft Yahei",sans-serif;
    color:#333;
    line-height:1.7;
}
a{
    text-decoration:none;
}
.section-title h2{
    color:#222;
    position:relative;
    padding-bottom:15px;
}
.section-title h2:after{
    content:"";
    width:80px;
    height:3px;
    background:#0d6efd;
    position:absolute;
    left:50%;
    transform:translateX(-50%);
    bottom:0;
}
/* 导航 */
.header{
    z-index:999;
}
/* 轮播banner */
.banner-bg{
    min-height:600px;
    width:100%;
}
.carousel-item{
    transition:all 0.6s ease-in-out;
}
/* 卡片hover动画 */
.hover-card{
    transition:all 0.3s ease;
}
.hover-card:hover{
    transform:translateY(-8px);
    box-shadow:0 10px 25px rgba(0,0,0,0.1) !important;
}
.hover-shadow{
    transition:0.3s;
}
.hover-shadow:hover{
    box-shadow:0 5px 18px rgba(0,100,255,0.15);
    border-color:#0d6efd;
}
/* 滚动平滑 */
html{
    scroll-behavior:smooth;
}
/* 响应式适配 */
@media(max-width:768px){
    .banner-bg{
        min-height:400px;
    }
    .display-4{
        font-size:2rem;
    }
}