:root{
  --theme:#0B3D91;
  --ink:#14213d;
  --muted:#667085;
  --line:#e4e9f1;
  --soft:#f5f8fc;
  --white:#fff;
  --shadow:0 14px 40px rgba(22,43,78,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#f7f9fc;font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.65}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}


.topbar{background:#071a3f;color:#dbe7ff;font-size:13px}
.topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.topbar a{color:#dbe7ff;margin-left:18px}
.header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;min-width:175px;color:var(--theme);font-size:19px;font-weight:800}
.logo img{width:34px;height:34px;object-fit:contain}
.main-nav{flex:1}
.nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-item{position:relative}
.nav-link{display:block;padding:26px 13px;font-size:15px;font-weight:600;white-space:nowrap}
.nav-link:hover,.nav-link:focus{color:var(--theme)}
.has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8090a8}
.dropdown-panel,.mega-menu{position:absolute;left:50%;top:calc(100% - 1px);transform:translateX(-50%) translateY(8px);width:350px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30}
.mega-menu{width:650px}
.nav-item:hover .dropdown-panel,.nav-item:focus-within .dropdown-panel,.nav-item:hover .mega-menu,.nav-item:focus-within .mega-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;height:12px;top:-12px}
.panel-title{margin:0 0 13px;color:var(--theme);font-size:14px;font-weight:800}
.panel-list{display:grid;gap:9px}
.panel-list a{display:block;padding:7px 0;border-bottom:1px solid #edf0f5;font-size:14px}
.panel-list a:hover,.mega-footer:hover{color:var(--theme)}
.mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.mega-card{display:block;padding:12px;border:1px solid #e6ebf3;border-radius:10px;background:#fbfcfe}
.mega-card:hover{border-color:#9db4de;background:#f4f7fd}
.mega-card strong{display:flex;align-items:center;gap:7px;font-size:14px}
.mega-card strong img{width:22px;height:22px;object-fit:contain}
.mega-card>img{width:25px;height:25px;object-fit:contain;margin-bottom:5px}
.mega-card small{display:block;color:var(--muted);font-size:11px;margin-top:4px;line-height:1.45}
.mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-weight:700;font-size:13px}
.header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
.member-btn{font-size:14px;color:var(--theme);font-weight:700}
.open-btn{padding:9px 15px;border-radius:7px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
.hamburger{display:none;width:40px;height:38px;padding:8px;border:1px solid var(--line);border-radius:7px;background:#fff;cursor:pointer}
.hamburger span{display:block;height:2px;background:var(--theme);margin:4px 0;border-radius:2px}


.drawer-overlay{display:none;position:fixed;inset:0;background:rgba(6,18,45,.55);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:60;transform:translateX(100%);transition:.25s;overflow:auto}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{height:70px;padding:16px 18px;display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--line);font-weight:800}
.drawer-head span{flex:1;color:var(--theme)}
.drawer-head a{font-size:13px;color:var(--theme)}
.drawer-close{border:0;background:none;font-size:28px;color:#52617a;cursor:pointer}
.drawer-menu{padding:10px 18px 30px}
.drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 2px;border:0;border-bottom:1px solid #edf0f5;background:none;text-align:left;font:inherit;color:var(--ink);cursor:pointer}
.drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
.drawer-toggle.active:after{content:"－"}
.drawer-submenu{display:none;padding:4px 12px;background:#f7f9fc}
.drawer-submenu.open{display:block}
.drawer-submenu a{display:block;padding:9px 0;color:#52617a;font-size:14px}


.category-page{padding:58px 0 82px}
.category-hero{padding:42px 48px;border-radius:20px;background:linear-gradient(135deg,#071a3f,#0B3D91 68%,#2a67ba);color:#fff;box-shadow:0 18px 45px rgba(11,61,145,.18);margin-bottom:36px}
.category-hero .eyebrow{display:inline-flex;padding:5px 11px;border:1px solid rgba(255,255,255,.3);border-radius:20px;color:#d9e7ff;font-size:12px;letter-spacing:.08em}
.category-hero h1{margin:13px 0 9px;font-size:clamp(28px,4vw,48px);line-height:1.2}
.category-hero p{max-width:730px;margin:0;color:#dce8ff;font-size:16px}
.filter-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin:0 0 20px}
.filter-row h2{margin:0;font-size:22px}
.filter-tags{display:flex;flex-wrap:wrap;gap:8px}
.filter-tags a{padding:7px 13px;border:1px solid #dce4f0;border-radius:20px;background:#fff;color:#52617a;font-size:13px}
.filter-tags a.active,.filter-tags a:hover{border-color:var(--theme);color:var(--theme);background:#eef4ff}
.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(--line);border-radius:15px;box-shadow:0 5px 20px rgba(22,43,78,.04);transition:.2s}
.article-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#b8c9e4}
.article-cover{height:190px;overflow:hidden;border-radius:10px;background:#e9eef6}
.article-cover img{width:100%;height:100%;object-fit:cover}
.article-body{min-width:0;display:flex;flex-direction:column;justify-content:center}
.article-category{color:var(--theme);font-size:12px;font-weight:800}
.article-body h3{margin:7px 0 7px;font-size:21px;line-height:1.4}
.article-body h3 a:hover{color:var(--theme)}
.article-summary{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden;color:#5f6d82;font-size:14px;line-height:1.75;margin:0 0 12px}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 17px;color:#8995a8;font-size:12px}
.article-meta span{white-space:nowrap}
.article-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:11px}
.article-tags a{padding:3px 8px;background:#f0f4fa;border-radius:4px;color:#64748b;font-size:11px}
.read-more{align-self:flex-start;margin-top:13px;color:var(--theme);font-weight:800;font-size:13px}
.read-more:after{content:" →";transition:.2s}
.read-more:hover:after{margin-left:4px}
.pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:34px}
.pagination a{min-width:36px;padding:7px 11px;text-align:center;border:1px solid #dce4f0;border-radius:7px;background:#fff;color:#52617a;font-size:13px}
.pagination a.active,.pagination a:hover{background:var(--theme);border-color:var(--theme);color:#fff}


.footer{padding:52px 0 20px;background:#081a3b;color:#c9d5e9}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px}
.footer-brand strong{display:block;color:#fff;font-size:20px;margin-bottom:12px}
.footer p{margin:7px 0;color:#aebed7;font-size:13px}
.footer h3{margin:0 0 14px;color:#fff;font-size:15px}
.footer-grid>div:not(.footer-brand) a{display:block;margin:8px 0;color:#aebed7;font-size:13px}
.footer-grid a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);color:#8fa3c1;font-size:12px}


@media(max-width:980px){
  .main-nav{display:none}
  .header-inner{justify-content:space-between}
  .header-btns{margin-left:auto}
  .hamburger{display:block}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .container{width:min(100% - 28px,1180px)}
  .topbar .container{align-items:flex-start;flex-direction:column;gap:0;padding:8px 0}
  .topbar a{margin:0 12px 0 0}
  .member-btn{display:none}
  .open-btn{padding:8px 11px}
  .category-page{padding:30px 0 55px}
  .category-hero{padding:30px 23px;border-radius:14px}
  .category-hero h1{font-size:31px}
  .category-hero p{font-size:14px}
  .article-card{grid-template-columns:1fr;gap:15px;padding:13px}
  .article-cover{height:190px}
  .article-body h3{font-size:18px}
  .filter-row{align-items:flex-start;flex-direction:column}
  .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
  .footer-bottom{display:block}
  .footer-bottom span{display:block;margin-top:6px}
}