:root{
      --theme:#0B3D91;
      --theme-dark:#072b68;
      --theme-soft:#eaf1fc;
      --accent:#4f7fc8;
      --ink:#172033;
      --muted:#667085;
      --line:#e3e8ef;
      --surface:#ffffff;
      --page:#f5f7fa;
      --success:#477057;
      --radius:16px;
      --shadow:0 14px 38px rgba(21,37,63,.09);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--page);
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;
      line-height:1.7;
      -webkit-font-smoothing:antialiased;
    }
    body,button,input,textarea{font:inherit}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{color:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      position:relative;
      z-index:102;
      color:#dfe9fb;
      background:#092d67;
      font-size:13px;
    }
    .topbar .container{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar span:last-child{display:flex;align-items:center;gap:20px}
    .topbar a{transition:color .2s ease}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:100;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 20px rgba(17,31,54,.04);
    }
    .header-inner{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:26px;
    }
    .logo{
      min-width:168px;
      display:flex;
      align-items:center;
      gap:10px;
      font-size:19px;
      font-weight:800;
      color:var(--theme);
    }
    .logo img{
      width:42px;
      height:42px;
      border-radius:11px;
      object-fit:contain;
      background:#fff;
    }
    .main-nav{margin-left:auto;height:76px}
    .nav-list{
      height:100%;
      display:flex;
      align-items:stretch;
      gap:3px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:stretch;
    }
    .nav-link{
      position:relative;
      display:flex;
      align-items:center;
      padding:0 12px;
      color:#28354a;
      font-size:15px;
      font-weight:650;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link{
      color:var(--theme);
      background:var(--theme-soft);
    }
    .nav-link.has-arrow:after{
      width:6px;
      height:6px;
      margin:-4px 0 0 8px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      content:"";
      transform:rotate(45deg);
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      right:0;
      z-index:120;
      visibility:hidden;
      opacity:0;
      transform:translateY(8px);
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
      border:1px solid var(--line);
      border-radius:0 0 16px 16px;
      background:#fff;
      box-shadow:0 22px 45px rgba(19,36,67,.15);
    }
    .dropdown-panel:before,
    .mega-menu:before{
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:8px;
      content:"";
    }
    .dropdown-panel{
      left:0;
      right:auto;
      width:320px;
      padding:20px;
    }
    .mega-menu{
      width:min(720px,calc(100vw - 40px));
      padding:22px;
    }
    .nav-item:hover>.dropdown-panel,
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.dropdown-panel,
    .nav-item:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      transform:translateY(0);
    }
    .mega-title,.drop-title{
      margin:0 0 12px;
      color:#26344c;
      font-size:13px;
      font-weight:800;
      letter-spacing:.05em;
    }
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:10px;
    }
    .mega-card{
      min-width:0;
      display:flex;
      align-items:center;
      gap:11px;
      padding:11px;
      border:1px solid #edf0f5;
      border-radius:11px;
      transition:border-color .2s ease,background .2s ease,transform .2s ease;
    }
    .mega-card:hover{
      border-color:#b9ccef;
      background:#f7faff;
      transform:translateY(-1px);
    }
    .mega-card img{
      width:38px;
      height:38px;
      flex:0 0 38px;
      object-fit:contain;
      border-radius:9px;
      background:#f2f5f9;
    }
    .mega-card span{min-width:0;display:block}
    .mega-card strong{
      display:block;
      overflow:hidden;
      color:#23324a;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card small{
      display:block;
      overflow:hidden;
      margin-top:2px;
      color:var(--muted);
      font-size:12px;
      line-height:1.45;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .drop-link{
      display:block;
      overflow:hidden;
      padding:9px 10px;
      border-radius:8px;
      color:#3c485a;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .drop-link small{color:#8a94a6}
    .drop-link:hover{color:var(--theme);background:var(--theme-soft)}
    .mega-footer{
      display:block;
      margin-top:14px;
      padding:11px 14px;
      border-radius:9px;
      color:#fff;
      background:var(--theme);
      font-size:14px;
      font-weight:700;
      text-align:center;
      transition:background .2s ease;
    }
    .mega-footer:hover{background:var(--theme-dark)}
    .header-btns{
      display:flex;
      align-items:center;
      gap:9px;
      white-space:nowrap;
    }
    .member-btn,.open-btn{
      display:inline-flex;
      min-height:40px;
      align-items:center;
      justify-content:center;
      padding:0 15px;
      border-radius:9px;
      font-size:14px;
      font-weight:700;
    }
    .member-btn{
      color:var(--theme);
      border:1px solid #b9cae8;
      background:#fff;
    }
    .open-btn{
      color:#fff;
      border:1px solid var(--theme);
      background:var(--theme);
    }
    .hamburger{
      width:42px;
      height:42px;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      padding:0;
      border:1px solid var(--line);
      border-radius:9px;
      background:#fff;
      cursor:pointer;
    }
    .hamburger span{
      width:20px;
      height:2px;
      display:block;
      background:var(--theme);
      transition:transform .2s ease,opacity .2s ease;
    }
    .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{
      position:fixed;
      inset:0;
      z-index:180;
      visibility:hidden;
      opacity:0;
      background:rgba(7,18,38,.56);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:190;
      width:min(390px,90vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 45px rgba(8,25,53,.2);
      transform:translateX(105%);
      transition:transform .25s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      display:flex;
      align-items:center;
      gap:10px;
      padding:14px 18px;
      color:#fff;
      background:var(--theme);
    }
    .drawer-head>a{
      display:inline-flex;
      min-height:36px;
      align-items:center;
      padding:0 11px;
      border:1px solid rgba(255,255,255,.35);
      border-radius:8px;
      font-size:14px;
    }
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      padding:0;
      color:#fff;
      border:0;
      background:transparent;
      font-size:30px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:12px 18px 30px}
    .drawer-link,.drawer-toggle{
      width:100%;
      min-height:48px;
      display:flex;
      align-items:center;
      padding:0 8px;
      color:#26364e;
      border:0;
      border-bottom:1px solid #edf0f4;
      background:transparent;
      font-weight:700;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle:after{
      margin-left:auto;
      color:var(--theme);
      content:"+";
      font-size:21px;
      font-weight:400;
    }
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      padding:0 8px;
      background:#f7f9fc;
      transition:max-height .3s ease,padding .3s ease;
    }
    .drawer-submenu.open{max-height:720px;padding:8px}
    .drawer-submenu a{
      display:block;
      padding:9px 10px;
      color:#586579;
      border-radius:7px;
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--theme);background:#fff}

    .article-page{
      min-width:0;
      padding:36px 0 74px;
    }
    .article-page .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      margin-bottom:24px;
      color:#728096;
      font-size:14px;
    }
    .article-page .breadcrumb a{color:var(--theme)}
    .article-page .article-layout{
      min-width:0;
      display:grid;
      grid-template-columns:minmax(0,1fr) 320px;
      align-items:start;
      gap:28px;
    }
    .article-page .article-shell{
      min-width:0;
      overflow:hidden;
      border:1px solid var(--line);
      border-radius:20px;
      background:#fff;
      box-shadow:var(--shadow);
    }
    .article-page .article-head{
      padding:42px 48px 30px;
      border-bottom:1px solid var(--line);
      background:
        radial-gradient(circle at 90% 10%,rgba(11,61,145,.1),transparent 32%),
        linear-gradient(145deg,#fff,#f8fbff);
    }
    .article-page .category-label{
      display:inline-flex;
      align-items:center;
      gap:7px;
      margin-bottom:17px;
      padding:6px 11px;
      color:var(--theme);
      border:1px solid #bfd0ec;
      border-radius:999px;
      background:var(--theme-soft);
      font-size:13px;
      font-weight:750;
    }
    .article-page .category-label:before{
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--theme);
      content:"";
    }
    .article-page h1{
      margin:0;
      color:#152238;
      font-size:clamp(30px,4vw,46px);
      line-height:1.24;
      letter-spacing:-.025em;
      overflow-wrap:anywhere;
    }
    .article-page .article-summary{
      margin:20px 0 0;
      padding-left:16px;
      color:#58677c;
      border-left:3px solid var(--theme);
      font-size:17px;
      line-height:1.85;
    }
    .article-page .article-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px 22px;
      margin-top:22px;
      color:#778397;
      font-size:14px;
    }
    .article-page .article-meta span{
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .article-page .article-meta span:before{
      width:6px;
      height:6px;
      border-radius:50%;
      background:#94a9c9;
      content:"";
    }
    .article-page .article-body{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      padding:38px 48px 44px;
      color:#344054;
      font-size:17px;
      line-height:1.95;
      overflow-wrap:anywhere;
    }
    .article-page .article-body h2,
    .article-page .article-body h3,
    .article-page .article-body h4{
      margin:1.8em 0 .7em;
      color:#17243a;
      line-height:1.4;
    }
    .article-page .article-body h2{
      padding-left:13px;
      border-left:4px solid var(--theme);
      font-size:27px;
    }
    .article-page .article-body h3{font-size:22px}
    .article-page .article-body p{margin:0 0 1.25em}
    .article-page .article-body a{
      color:var(--theme);
      text-decoration:underline;
      text-underline-offset:3px;
    }
    .article-page .article-body img{
      max-width:100%;
      height:auto;
      margin:26px auto;
      border-radius:13px;
    }
    .article-page .article-body table{
      width:100%;
      max-width:100%;
      border-collapse:collapse;
    }
    .article-page .article-body th,
    .article-page .article-body td{
      padding:11px 13px;
      border:1px solid #dbe2ec;
      text-align:left;
    }
    .article-page .article-body blockquote{
      margin:26px 0;
      padding:18px 22px;
      color:#42526a;
      border-left:4px solid var(--theme);
      background:#f3f7fd;
    }
    .article-page .tag-row{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:9px;
      padding:22px 48px;
      border-top:1px solid var(--line);
      background:#fbfcfe;
    }
    .article-page .tag-row strong{font-size:14px}
    .article-page .tag-row a{
      display:inline-flex;
      padding:5px 10px;
      color:var(--theme);
      border:1px solid #cbd8ee;
      border-radius:999px;
      background:#fff;
      font-size:13px;
    }
    .article-page .post-navigation{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:14px;
      margin-top:20px;
    }
    .article-page .post-navigation a{
      min-width:0;
      display:block;
      padding:18px 20px;
      border:1px solid var(--line);
      border-radius:14px;
      background:#fff;
      box-shadow:0 8px 24px rgba(18,34,61,.05);
      transition:border-color .2s ease,transform .2s ease;
    }
    .article-page .post-navigation a:hover{
      border-color:#9bb6df;
      transform:translateY(-2px);
    }
    .article-page .post-navigation small{
      display:block;
      margin-bottom:5px;
      color:#7c8798;
    }
    .article-page .post-navigation strong{
      display:block;
      overflow:hidden;
      color:#26354c;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .article-page .post-navigation a:last-child{text-align:right}
    .article-page .article-sidebar{
      min-width:0;
      display:grid;
      gap:20px;
    }
    .article-page .side-card{
      overflow:hidden;
      padding:23px;
      border:1px solid var(--line);
      border-radius:16px;
      background:#fff;
      box-shadow:0 10px 28px rgba(20,35,61,.06);
    }
    .article-page .side-card h2{
      margin:0 0 15px;
      padding-bottom:12px;
      color:#1e2c42;
      border-bottom:1px solid var(--line);
      font-size:19px;
    }
    .article-page .side-card p{
      margin:0 0 16px;
      color:#68758a;
      font-size:14px;
    }
    .article-page .side-actions{
      display:grid;
      gap:9px;
    }
    .article-page .side-actions a{
      display:flex;
      min-height:42px;
      align-items:center;
      justify-content:center;
      border-radius:9px;
      font-size:14px;
      font-weight:750;
    }
    .article-page .side-actions a:first-child{color:#fff;background:var(--theme)}
    .article-page .side-actions a:last-child{color:var(--theme);border:1px solid #b9cbed}
    .article-page .related-section{
      margin-top:45px;
    }
    .article-page .section-heading{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:18px;
    }
    .article-page .section-heading h2{
      margin:0;
      color:#19283f;
      font-size:28px;
    }
    .article-page .section-heading p{margin:0;color:#748095;font-size:14px}
    .article-page .related-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
    }
    .article-page .related-card{
      min-width:0;
      overflow:hidden;
      border:1px solid var(--line);
      border-radius:15px;
      background:#fff;
      box-shadow:0 8px 26px rgba(18,35,64,.06);
      transition:transform .2s ease,box-shadow .2s ease;
    }
    .article-page .related-card:hover{
      transform:translateY(-3px);
      box-shadow:0 15px 34px rgba(18,35,64,.11);
    }
    .article-page .related-card img{
      width:100%;
      height:160px;
      object-fit:cover;
      background:#e9eef5;
    }
    .article-page .related-content{padding:17px}
    .article-page .related-content h3{
      display:-webkit-box;
      overflow:hidden;
      margin:0;
      color:#26354c;
      font-size:17px;
      line-height:1.55;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .article-page .related-content p{
      display:-webkit-box;
      overflow:hidden;
      margin:9px 0 12px;
      color:#6c788b;
      font-size:14px;
      line-height:1.65;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .article-page .related-meta{
      display:flex;
      justify-content:space-between;
      gap:12px;
      color:#8993a3;
      font-size:12px;
    }

    .footer{
      color:#bdc9dc;
      background:#091a35;
      border-top:4px solid var(--theme);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.35fr 1fr 1fr 1.1fr;
      gap:46px;
      padding:54px 0 42px;
    }
    .footer h3{
      margin:0 0 14px;
      color:#fff;
      font-size:23px;
    }
    .footer h4{
      margin:0 0 15px;
      color:#fff;
      font-size:16px;
    }
    .footer p{margin:7px 0;font-size:14px}
    .footer-grid>div>a{
      display:block;
      width:max-content;
      max-width:100%;
      margin:8px 0;
      color:#bdc9dc;
      font-size:14px;
      transition:color .2s ease;
    }
    .footer-grid>div>a:hover,
    .footer p a:hover{color:#fff}
    .footer-bottom{
      min-height:64px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      border-top:1px solid rgba(255,255,255,.1);
      color:#94a4bb;
      font-size:13px;
    }

    @media (max-width:1080px){
      .main-nav{display:none}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
      .hamburger{display:flex}
      .article-page .article-layout{grid-template-columns:minmax(0,1fr) 280px}
      .article-page .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:820px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{min-height:42px;align-items:flex-start;flex-direction:column;justify-content:center;gap:2px}
      .topbar span:last-child{gap:12px;flex-wrap:wrap}
      .article-page{padding-top:24px}
      .article-page .article-layout{grid-template-columns:1fr}
      .article-page .article-sidebar{grid-template-columns:repeat(2,minmax(0,1fr))}
      .article-page .article-head{padding:32px 28px 25px}
      .article-page .article-body{padding:30px 28px 34px}
      .article-page .tag-row{padding:20px 28px}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px}
    }
    @media (max-width:580px){
      .container{width:min(100% - 22px,1180px)}
      .topbar span:last-child{display:none}
      .logo{min-width:0}
      .logo span{
        max-width:120px;
        overflow:hidden;
        text-overflow:ellipsis;
        white-space:nowrap;
      }
      .member-btn{display:none}
      .open-btn{min-height:38px;padding:0 12px}
      .article-page .breadcrumb{font-size:13px}
      .article-page .article-shell{border-radius:15px}
      .article-page .article-head{padding:27px 20px 22px}
      .article-page h1{font-size:29px}
      .article-page .article-summary{font-size:15px}
      .article-page .article-meta{gap:8px 15px}
      .article-page .article-body{padding:26px 20px 30px;font-size:16px}
      .article-page .article-body h2{font-size:23px}
      .article-page .tag-row{padding:18px 20px}
      .article-page .post-navigation{grid-template-columns:1fr}
      .article-page .post-navigation a:last-child{text-align:left}
      .article-page .article-sidebar{grid-template-columns:1fr}
      .article-page .section-heading{align-items:flex-start;flex-direction:column;gap:4px}
      .article-page .section-heading h2{font-size:24px}
      .article-page .related-grid{grid-template-columns:1fr}
      .article-page .related-card img{height:190px}
      .footer-grid{grid-template-columns:1fr;padding:42px 0 30px}
      .footer-bottom{align-items:flex-start;flex-direction:column;justify-content:center;padding:18px 0}
    }