.side-nav{position:fixed;left:0;top:0;bottom:0;width:220px;background:#1A1A1A;z-index:1000;display:flex;flex-direction:column;justify-content:center;padding:40px 0}
.side-nav>a{display:block;padding:16px 40px;color:rgba(255,255,255,.6);font-size:15px;font-weight:500;transition:all .2s;border-left:3px solid transparent}
.side-nav>a:hover,.side-nav>a.active{color:#fff;border-left-color:#C41E3A;background:rgba(196,30,58,.15)}
.side-brand{padding:16px 40px;font-size:20px;font-weight:800;color:#C41E3A;margin-bottom:20px}
.nav-item-has-dropdown{position:relative}
.nav-item-has-dropdown>a{display:block;padding:16px 40px;color:rgba(255,255,255,.6);font-size:15px;font-weight:500;transition:all .2s;border-left:3px solid transparent}
.nav-item-has-dropdown:hover>a{color:#fff;border-left-color:#C41E3A;background:rgba(196,30,58,.15)}
.dropdown-menu{position:absolute;left:100%;top:0;min-width:160px;background:#2A2A2A;border-radius:0 12px 12px 0;box-shadow:4px 4px 20px rgba(0,0,0,.3);opacity:0;visibility:hidden;transform:translateX(-10px);transition:all .3s;padding:12px 0;list-style:none;z-index:1001}
.nav-item-has-dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateX(0)}
.dropdown-menu li a{display:block;padding:10px 20px;color:rgba(255,255,255,.6);font-size:14px;transition:all .2s}
.dropdown-menu li a:hover{color:#fff;background:rgba(196,30,58,.2)}
.main{margin-left:220px}
.page-header{padding:160px 80px 80px;background:#1A1A1A}
.page-title{font-size:clamp(40px,6vw,72px);font-weight:900;line-height:1.2;margin-bottom:16px;color:#fff}
.page-title em{color:#C41E3A;font-style:normal}
.page-breadcrumb{font-size:14px;color:rgba(255,255,255,.5)}
.page-breadcrumb a{color:rgba(255,255,255,.6)}.page-breadcrumb a:hover{color:#C41E3A}
section{padding:150px 80px}
.section-eyebrow{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:3px;color:#C41E3A;margin-bottom:16px}
h2.section-title{font-size:clamp(32px,4vw,48px);font-weight:800;line-height:1.2;margin-bottom:35px}
.about-intro{background:#fff;text-align:center}
.about-intro p{font-size:18px;color:#666;max-width:90%;margin:0 auto;line-height:2}
.about-stats{background:#F5F5F5}
.about-origin{padding: 0;
    position: relative;
    overflow: hidden;
    min-height: 83vh;
    display: flex;
    align-items: center;
    color: #fff;
    background-image: url(/Public/Index/images/about_bjjj.jpg);
    background-size: 100%;
    background-position: center;}

.about-origin.xiandai{
    background-image: url(/Public/Index/images/about_bjjj2.jpg)!important;
}



.about-origin::before{content:"";position:absolute;inset:0;z-index:0}
.about-origin-inner{position:relative;z-index:2;width:100%;max-width:90%;margin:0 auto;padding:110px auot}
.about-origin-content{max-width:620px}
.about-origin-eyebrow{font-size:12px;font-weight:700;letter-spacing:3px;text-transform:uppercase;color:rgba(255,255,255,.72);margin-bottom:18px}
.about-origin-title{font-size:clamp(36px,4vw,56px);font-weight:900;line-height:1.15;margin-bottom:26px;color:#fff}
.about-origin-desc{font-size:15px;color:rgba(255,255,255,.86);line-height:2;margin-bottom:10px}




@media(max-width:768px){.about-origin{min-height:420px}.about-origin-inner{padding:72px 20px}.about-origin-content{max-width:100%}}

.about-count{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#E5E5E5;max-width:1000px;margin:0 auto}
.ac{background:#fff;padding:40px 20px;text-align:center;transition:all .3s}
.ac:hover{background:#C41E3A}
.ac:hover .ac-n,.ac:hover .ac-l{color:#fff}
.ac-n{font-size:44px;font-weight:900;color:#C41E3A;line-height:1;transition:color .3s}
.ac-l{font-size:13px;color:#888;margin-top:8px;transition:color .3s}
.about-timeline{background:#fff}
.timeline{display:flex;justify-content:space-between;max-width:900px;margin:48px auto 0;position:relative}
.timeline::before{content:"";position:absolute;top:24px;left:0;right:0;height:2px;background:#E5E5E5}
.timeline-item{text-align:center;position:relative;flex:1}
.timeline-year{width:48px;height:48px;background:#C41E3A;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;margin:0 auto 16px;position:relative;z-index:1}
.timeline-title{font-size:16px;font-weight:700;margin-bottom:8px}
.timeline-desc{font-size:14px;color:#888}
.cta-section{background:#C41E3A;color:#fff;text-align:center}
.cta-section h2{color:#fff}
.btn{padding:14px 36px;border-radius:50px;font-weight:600;font-size:14px;display:inline-block;border:none;transition:all .3s;background:#fff;color:#C41E3A}.btn:hover{background:#1A1A1A;color:#fff}
footer{padding:40px 80px;border-top:1px solid #E5E5E5;text-align:center;color:#999;font-size:13px;background:#fff;margin-left:220px}
@media(max-width:1024px){
    .side-nav{display:none}
    .main,footer{margin-left:0}
    .about-count{grid-template-columns:repeat(2,1fr)}
    .timeline{flex-direction:column;gap:32px}
    .timeline::before{display:none}
}
@media(max-width:768px){
    .page-header{padding:120px 20px 60px}
    section{padding:60px 20px}
    .about-count{grid-template-columns:1fr}
    footer{padding:40px 20px}
    .about-origin{background-size:cover !important}
    .about-intro p{font-size:16px}
    .ac-n{font-size:32px}
}
@media(max-width:480px){
    .about-intro p{font-size:14px}
    .timeline-item{text-align:left}
    .timeline-year{margin:0 0 12px}
}