:root{
      --primary:#0B3D91;
      --primary-dark:#082d6b;
      --ink:#172033;
      --muted:#667085;
      --line:#e5eaf2;
      --soft:#f5f8fc;
      --white:#fff;
      --shadow:0 16px 45px rgba(15,35,70,.1);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;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}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#10264c;color:#dbe7fb;font-size:13px}
    .topbar .container{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar-links{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{height:78px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
    .header-inner{height:100%;display:flex;align-items:center;gap:38px}
    .logo{display:flex;align-items:center;gap:10px;min-width:185px;font-size:20px;font-weight:800;color:var(--primary)}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1;height:100%}
    .nav-list{height:100%;display:flex;align-items:center;gap:5px;list-style:none;margin:0;padding:0}
    .nav-item{height:100%;position:relative;display:flex;align-items:center}
    .nav-link{padding:25px 13px;color:#293750;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--primary)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8d99ac}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%) translateY(8px);width:330px;padding:22px;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:640px}
    .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;top:-12px;height:12px}
    .drop-title,.mega-title{margin:0 0 13px;color:var(--primary);font-size:15px;font-weight:800}
    .drop-list,.mega-links{display:grid;gap:9px}
    .drop-list a,.mega-links a{font-size:14px;color:#45536b}
    .drop-list a:hover,.mega-links a:hover{color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #edf0f5;border-radius:10px;background:#fbfcfe}
    .mega-card:hover{border-color:#adc2e7;background:#f4f8ff}
    .mega-card img{width:34px;height:34px;object-fit:contain;border-radius:7px}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:13px}
    .mega-card small{color:#7b879a;font-size:11px}
    .mega-columns{display:grid;grid-template-columns:1fr 1fr;gap:28px}
    .mega-footer{display:block;margin-top:18px;padding-top:14px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:13px;white-space:nowrap}
    .member-btn{padding:8px 14px;border-radius:8px;background:var(--primary);color:#fff;font-size:13px}
    .account-link{color:var(--primary);font-size:14px}
    .hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;margin:4px 0;background:#23334e;transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(7,20,43,.52);z-index:50}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(390px,88vw);background:#fff;z-index:51;transform:translateX(100%);transition:.25s;overflow:auto;box-shadow:-10px 0 30px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:70px;display:flex;align-items:center;gap:18px;padding:0 20px;border-bottom:1px solid var(--line)}
    .drawer-head strong{flex:1;color:var(--primary)}
    .drawer-head a{font-size:14px;color:var(--primary)}
    .drawer-close{border:0;background:none;font-size:28px;color:#657187;cursor:pointer}
    .drawer-menu{padding:14px 20px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf0f5;background:none;text-align:left;color:#263650;font-size:15px}
    .drawer-toggle{cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#8b96a8}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 8px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:#6a7688;font-size:14px}
    .footer{margin-top:70px;background:#101d35;color:#b9c5d8;padding:54px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-brand strong{color:#fff;font-size:20px}
    .footer p{margin:10px 0;color:#9eabc0;font-size:13px}
    .footer a{display:block;margin:8px 0;color:#b9c5d8;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#8f9db2}
    .article-page{padding:42px 0 0}
    .article-head{max-width:900px;margin:0 auto 28px;text-align:center}
    .article-breadcrumb{margin-bottom:15px;color:var(--primary);font-size:13px}
    .article-head h1{margin:0 auto 16px;color:#14213a;font-size:clamp(28px,4vw,46px);line-height:1.25;letter-spacing:-.02em}
    .article-meta{display:flex;justify-content:center;flex-wrap:wrap;gap:18px;color:#7a8799;font-size:13px}
    .article-layout{display:grid;grid-template-columns:minmax(0,860px) 270px;gap:30px;align-items:start}
    .article-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 28px rgba(20,43,82,.05);overflow:hidden}
    .article-cover{width:100%;max-height:440px;object-fit:cover}
    .article-body{min-width:0;max-width:100%;overflow-x:auto;padding:34px 42px 42px;color:#39465b;font-size:16px}
    .article-body h2,.article-body h3{color:#172b50;line-height:1.4;margin:30px 0 13px}
    .article-body p{margin:0 0 18px}
    .article-body img,.article-body table{max-width:100%}
    .article-body blockquote{margin:22px 0;padding:15px 20px;border-left:4px solid var(--primary);background:#f3f7fd;color:#53647b}
    .article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px;padding-top:20px;border-top:1px solid var(--line)}
    .article-tags a{padding:5px 10px;border-radius:20px;background:#edf3fc;color:var(--primary);font-size:12px}
    .article-side{display:grid;gap:16px}
    .side-box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px}
    .side-box h2{margin:0 0 13px;font-size:17px;color:#1d3152}
    .side-box p{margin:0;color:#738096;font-size:13px}
    .side-link{display:block;padding:10px 0;border-bottom:1px solid #edf0f5;color:#465671;font-size:13px}
    .side-link:last-child{border-bottom:0}
    .side-link:hover{color:var(--primary)}
    .article-pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}
    .pager-item{padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:12px;color:#526179;font-size:13px}
    .pager-item strong{display:block;margin-top:5px;color:#213758;font-size:14px}
    .pager-item.next{text-align:right}
    .like-articles{margin-top:38px}
    .like-articles h2{font-size:22px;color:#172b50}
    .like-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
    .like-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
    .like-card img{height:120px;width:100%;object-fit:cover;border-radius:8px;margin-bottom:10px}
    .like-card strong{display:block;font-size:14px;line-height:1.5}
    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{justify-content:space-between;gap:12px}
      .logo{min-width:auto}
      .mega-menu{width:560px}
      .article-layout{grid-template-columns:1fr}
      .article-side{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{height:auto;min-height:38px;padding:7px 0;align-items:flex-start;gap:5px;flex-direction:column}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header{height:68px}
      .account-link{display:none}
      .member-btn{font-size:12px;padding:7px 9px}
      .article-page{padding-top:28px}
      .article-head{text-align:left}
      .article-meta{justify-content:flex-start;gap:8px 14px}
      .article-body{padding:25px 20px 30px;font-size:15px}
      .article-side{grid-template-columns:1fr}
      .article-pager{grid-template-columns:1fr}
      .pager-item.next{text-align:left}
      .like-grid{grid-template-columns:1fr}
      .footer{margin-top:45px;padding-top:38px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:8px}
    }