:root{
  --主题色:#0B3D91;
  --深色:#10233f;
  --雾蓝:#eef4fb;
  --浅线:#d8e2ef;
  --文字:#21324a;
  --浅字:#718096;
  --白:#fff;
  --阴影:0 16px 40px rgba(17,49,91,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--文字);background:#f7faff;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.topbar{height:38px;background:#f0f5fb;border-bottom:1px solid var(--浅线);font-size:13px;color:#61728a}
.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between}
.topbar a{color:var(--主题色)}
.header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--浅线)}
.header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;min-width:170px;color:var(--深色);font-size:18px;font-weight:800}
.logo img{width:34px;height:34px;object-fit:contain}
.main-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-list>li{position:relative}
.nav-link{display:block;padding:24px 13px;color:#344861;font-size:14px;white-space:nowrap}
.nav-link:hover,.nav-link:focus{color:var(--主题色)}
.has-arrow:after{content:"";display:inline-block;width:6px;height:6px;margin:0 0 3px 7px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
.dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translate(-50%,8px);width:310px;padding:20px;background:#fff;border:1px solid var(--浅线);border-radius:0 0 14px 14px;box-shadow:var(--阴影);opacity:0;visibility:hidden;transition:.2s ease}
.mega-menu{width:650px}
.nav-list>li:hover>.dropdown-panel,.nav-list>li:focus-within>.dropdown-panel,.nav-list>li:hover>.mega-menu,.nav-list>li:focus-within>.mega-menu{opacity:1;visibility:visible;transform:translate(-50%,0)}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.drop-title,.mega-title{margin:0 0 12px;color:var(--主题色);font-weight:800}
.drop-item{display:block;padding:8px 0;border-bottom:1px solid #edf2f7;font-size:14px}
.drop-item:hover,.mega-card:hover{color:var(--主题色)}
.mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.mega-card{display:grid;grid-template-columns:34px 1fr;column-gap:8px;padding:11px;border:1px solid #e6edf5;border-radius:10px;background:#fbfdff}
.mega-card img{width:30px;height:30px;object-fit:contain;grid-row:span 3}
.mega-card strong{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mega-card small{display:block;color:var(--浅字);font-size:11px;line-height:1.5}
.mega-footer{display:inline-block;margin-top:15px;color:var(--主题色);font-size:13px;margin-right:14px}
.header-btns{display:flex;align-items:center;gap:13px;white-space:nowrap}
.open-account{padding:8px 15px;color:#fff;background:var(--主题色);border-radius:7px;font-size:13px}
.hamburger{display:none;border:0;background:none;padding:8px;cursor:pointer}
.hamburger span{display:block;width:24px;height:2px;background:var(--深色);margin:5px 0;transition:.2s}
.hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer-overlay{display:none;position:fixed;inset:0;background:rgba(13,32,58,.42);z-index:50}
.drawer-overlay.open{display:block}
.mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(380px,88vw);background:#fff;z-index:51;transform:translateX(100%);transition:.3s ease;overflow:auto;box-shadow:-12px 0 30px rgba(0,0,0,.12)}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:15px;padding:20px;border-bottom:1px solid var(--浅线);color:var(--主题色);font-weight:700}
.drawer-head>a{margin-left:auto;padding:5px 10px;background:var(--主题色);color:#fff;border-radius:5px;font-size:12px}
.drawer-close{border:0;background:none;font-size:28px;line-height:1;color:#52657d;cursor:pointer}
.drawer-menu{padding:12px 20px 30px}
.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf2f7;background:none;text-align:left;color:var(--深色);font-size:15px;cursor:pointer}
.drawer-toggle:after{content:"＋";float:right;color:var(--主题色)}
.drawer-toggle.active:after{content:"－"}
.drawer-submenu{display:none;padding:4px 0 8px 15px}
.drawer-submenu.open{display:block}
.drawer-submenu a{display:block;padding:7px 0;color:var(--浅字);font-size:13px}
.footer{margin-top:70px;background:#10233f;color:#cbd7e7;padding:52px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
.footer h3,.footer h4{margin:0 0 15px;color:#fff}
.footer h3{font-size:20px}
.footer h4{font-size:14px}
.footer p{margin:7px 0;color:#aebed2;font-size:13px}
.footer-grid>div>a{display:block;margin:7px 0;color:#aebed2;font-size:13px}
.footer-grid>div>a:hover{color:#fff}
.footer-bottom{margin-top:35px;padding:18px 0;border-top:1px solid rgba(255,255,255,.13);font-size:12px;color:#9fb0c7}
.category-page{padding:58px 0 0}
.category-intro{text-align:center;margin:0 auto 38px;max-width:760px}
.category-kicker{display:inline-flex;padding:5px 12px;border:1px solid #b9cbe2;border-radius:30px;color:var(--主题色);background:#fff;font-size:12px;letter-spacing:.08em}
.category-intro h1{margin:13px 0 8px;color:var(--深色);font-size:clamp(30px,4vw,48px);line-height:1.25}
.category-intro p{margin:0;color:var(--浅字);font-size:15px}
.article-list{display:grid;gap:18px}
.article-card{display:grid;grid-template-columns:300px minmax(0,1fr);gap:24px;padding:18px;background:#fff;border:1px solid var(--浅线);border-radius:14px;box-shadow:0 8px 24px rgba(27,65,112,.05);transition:.2s ease}
.article-card:hover{transform:translateY(-3px);box-shadow:var(--阴影)}
.article-cover{height:190px;border-radius:9px;overflow:hidden;background:var(--雾蓝)}
.article-cover img{width:100%;height:100%;object-fit:cover}
.article-body{min-width:0;padding:2px 5px 2px 0}
.article-label{display:inline-block;margin-bottom:6px;color:var(--主题色);font-size:12px}
.article-body h2{margin:0 0 8px;color:var(--深色);font-size:21px;line-height:1.4}
.article-summary{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden;margin:0 0 12px;color:#65758b;font-size:14px;line-height:1.75}
.article-meta{display:flex;flex-wrap:wrap;gap:10px;color:#8795a7;font-size:12px}
.article-tags{margin-top:11px;display:flex;flex-wrap:wrap;gap:6px}
.article-tags span{padding:2px 8px;border-radius:20px;background:#f0f5fb;color:#637892;font-size:11px}
.read-more{display:inline-block;margin-top:13px;color:var(--主题色);font-weight:700;font-size:13px}
.pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:34px}
.pagination a{min-width:34px;padding:5px 10px;text-align:center;border:1px solid var(--浅线);border-radius:6px;background:#fff;color:#65758b;font-size:13px}
.pagination a.active,.pagination a:hover{background:var(--主题色);border-color:var(--主题色);color:#fff}
@media(max-width:980px){
  .main-nav{display:none}
  .hamburger{display:block}
  .header-btns{margin-left:auto}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .container{width:min(100% - 28px,1180px)}
  .topbar{height:auto;padding:8px 0}
  .topbar .container{display:block;line-height:1.7}
  .topbar .contact{display:block}
  .header-inner{min-height:65px;gap:10px}
  .logo{min-width:0;font-size:16px}
  .logo img{width:30px;height:30px}
  .header-btns>span{display:none}
  .open-account{padding:6px 10px}
  .category-page{padding-top:38px}
  .category-intro{margin-bottom:26px}
  .category-intro h1{font-size:32px}
  .article-card{grid-template-columns:1fr;gap:15px;padding:13px}
  .article-cover{height:190px}
  .article-body h2{font-size:19px}
  .footer{margin-top:45px;padding-top:35px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px 15px}
}
@media(max-width:400px){
  .footer-grid{grid-template-columns:1fr}
  .mega-menu{width:calc(100vw - 30px)}
}