:root{
      --theme:#0B3D91;
      --theme-dark:#072b68;
      --theme-light:#eaf1ff;
      --accent:#f36f56;
      --cream:#fff9ef;
      --ink:#202631;
      --muted:#667085;
      --line:#e4e8ef;
      --surface:#fff;
      --page:#f5f7fb;
      --radius:18px;
      --shadow:0 18px 48px rgba(25,38,69,.10);
    }
    *{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 CJK SC",Arial,sans-serif;
      line-height:1.65;
    }
    body.drawer-lock{overflow:hidden}
    img{max-width:100%;display:block}
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dce7ff;
      background:var(--theme-dark);
      font-size:13px;
    }
    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar-welcome{margin:0}
    .topbar-contact{display:flex;align-items:center;gap:20px}
    .topbar-contact a{transition:color .2s ease}
    .topbar-contact a:hover{color:#fff}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 20px rgba(19,33,68,.05);
    }
    .header-inner{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      gap:10px;
      color:var(--theme);
      font-weight:800;
      font-size:19px;
      white-space:nowrap;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .main-nav{margin-left:auto;align-self:stretch}
    .nav-list{
      height:100%;
      display:flex;
      align-items:stretch;
      gap:2px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }
    .nav-link{
      height:100%;
      display:flex;
      align-items:center;
      padding:0 12px;
      color:#303746;
      font-size:15px;
      font-weight:600;
      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-light);
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin-left:7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg) translateY(-2px);
    }
    .dropdown-panel,.mega-menu{
      position:absolute;
      top:100%;
      left:0;
      z-index:60;
      opacity:0;
      visibility:hidden;
      pointer-events:none;
      transform:translateY(8px);
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 16px 16px;
      box-shadow:0 24px 60px rgba(15,37,79,.16);
    }
    .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;
      pointer-events:auto;
      transform:translateY(0);
    }
    .dropdown-panel{
      width:340px;
      padding:18px;
    }
    .dropdown-title{
      display:flex;
      justify-content:space-between;
      gap:14px;
      padding-bottom:12px;
      margin-bottom:5px;
      border-bottom:1px solid var(--line);
      font-size:14px;
    }
    .dropdown-title span{font-weight:800}
    .dropdown-title a{color:var(--theme)}
    .dropdown-article{
      display:block;
      padding:10px 8px;
      border-radius:8px;
      color:#414958;
      font-size:14px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .dropdown-article:hover{color:var(--theme);background:var(--theme-light)}
    .mega-menu{
      width:760px;
      left:50%;
      padding:20px;
      transform:translate(-50%,8px);
    }
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{transform:translate(-50%,0)}
    .mega-menu-wide{width:900px}
    .mega-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:14px;
      padding-bottom:12px;
      border-bottom:1px solid var(--line);
    }
    .mega-head strong{color:var(--theme);font-size:17px}
    .mega-head span{color:var(--muted);font-size:13px}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:10px;
    }
    .mega-card{
      min-width:0;
      display:flex;
      align-items:flex-start;
      gap:10px;
      padding:11px;
      border:1px solid #edf0f5;
      border-radius:12px;
      transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
    }
    .mega-card:hover{
      border-color:#bdcdef;
      transform:translateY(-2px);
      box-shadow:0 9px 22px rgba(11,61,145,.09);
    }
    .mega-card>img{
      width:42px;
      height:42px;
      flex:0 0 42px;
      object-fit:contain;
      border-radius:9px;
      background:#f4f6fa;
    }
    .video-mega-card>img{object-fit:cover}
    .mega-card-body{min-width:0;display:block}
    .mega-card-body strong{
      display:block;
      overflow:hidden;
      color:#273044;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card-body small{
      display:block;
      margin-top:2px;
      color:var(--muted);
      font-size:11px;
    }
    .mega-card-body p{
      display:-webkit-box;
      overflow:hidden;
      margin:4px 0 0;
      color:var(--muted);
      font-size:12px;
      line-height:1.45;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
    }
    .mega-categories{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:14px;
    }
    .mega-categories a{
      padding:6px 11px;
      color:var(--theme);
      background:var(--theme-light);
      border-radius:999px;
      font-size:12px;
    }
    .mega-footer{
      display:block;
      margin-top:14px;
      padding:10px;
      color:#fff;
      background:var(--theme);
      border-radius:10px;
      text-align:center;
      font-size:14px;
      font-weight:700;
    }
    .header-btns{
      display:flex;
      align-items:center;
      gap:9px;
      flex:0 0 auto;
    }
    .member-entry{display:inline-flex;align-items:center}
    .account-entry{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:40px;
      padding:0 18px;
      color:#fff;
      background:var(--theme);
      border-radius:10px;
      font-size:14px;
      font-weight:700;
      box-shadow:0 8px 20px rgba(11,61,145,.18);
    }
    .hamburger{
      width:42px;
      height:42px;
      display:none;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:5px;
      padding:0;
      background:#fff;
      border:1px solid var(--line);
      border-radius:10px;
      cursor:pointer;
    }
    .hamburger span{
      width:19px;
      height:2px;
      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:80;
      visibility:hidden;
      opacity:0;
      background:rgba(10,20,40,.58);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      z-index:90;
      width:min(390px,90vw);
      height:100vh;
      overflow-y:auto;
      background:#fff;
      box-shadow:-18px 0 50px rgba(10,27,59,.2);
      transform:translateX(105%);
      transition:transform .25s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      position:sticky;
      top:0;
      z-index:2;
      min-height:72px;
      display:flex;
      align-items:center;
      gap:12px;
      padding:14px 18px;
      background:#fff;
      border-bottom:1px solid var(--line);
    }
    .drawer-head>a{
      padding:8px 14px;
      color:#fff;
      background:var(--theme);
      border-radius:8px;
      font-weight:700;
    }
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      color:#384152;
      background:#f2f4f8;
      border:0;
      border-radius:50%;
      font-size:26px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:14px 18px 30px}
    .drawer-link,.drawer-toggle{
      width:100%;
      display:flex;
      align-items:center;
      min-height:48px;
      padding:0 12px;
      color:#273044;
      background:transparent;
      border:0;
      border-bottom:1px solid #edf0f4;
      text-align:left;
      font-weight:700;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      margin-left:auto;
      color:var(--theme);
      font-size:20px;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:7px 0 9px 15px;
      background:#f7f9fd;
      border-radius:0 0 10px 10px;
    }
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;
      padding:8px 11px;
      color:#535d70;
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--theme)}

    .category-page{min-height:650px}
    .category-page .category-hero{
      position:relative;
      overflow:hidden;
      padding:72px 0 62px;
      color:#fff;
      background:
        radial-gradient(circle at 14% 15%,rgba(243,111,86,.35),transparent 28%),
        radial-gradient(circle at 85% 75%,rgba(116,164,255,.28),transparent 30%),
        linear-gradient(135deg,var(--theme-dark),var(--theme));
    }
    .category-page .category-hero::before,
    .category-page .category-hero::after{
      content:"";
      position:absolute;
      border:1px solid rgba(255,255,255,.15);
      border-radius:50%;
    }
    .category-page .category-hero::before{
      width:330px;height:330px;right:-100px;top:-180px;
    }
    .category-page .category-hero::after{
      width:190px;height:190px;left:-70px;bottom:-115px;
    }
    .category-page .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:9px;
      margin-bottom:18px;
      color:#d9e5ff;
      font-size:14px;
    }
    .category-page .breadcrumb a:hover{color:#fff}
    .category-page .category-title{
      max-width:820px;
      margin:0;
      font-size:clamp(34px,5vw,58px);
      line-height:1.15;
      letter-spacing:-1px;
    }
    .category-page .category-intro{
      max-width:760px;
      margin:18px 0 0;
      color:#e1e9fa;
      font-size:17px;
    }
    .category-page .category-tags{
      display:flex;
      flex-wrap:wrap;
      gap:9px;
      margin-top:25px;
    }
    .category-page .category-tags span{
      padding:7px 13px;
      color:#fff;
      background:rgba(255,255,255,.11);
      border:1px solid rgba(255,255,255,.18);
      border-radius:999px;
      font-size:13px;
    }
    .category-page .category-content{padding:58px 0 76px}
    .category-page .content-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:25px;
      margin-bottom:25px;
    }
    .category-page .content-head h2{
      margin:0;
      color:#172033;
      font-size:29px;
    }
    .category-page .content-head p{
      max-width:600px;
      margin:5px 0 0;
      color:var(--muted);
    }
    .category-page .content-mark{
      flex:0 0 auto;
      padding:8px 13px;
      color:var(--theme);
      background:var(--theme-light);
      border-radius:999px;
      font-size:13px;
      font-weight:700;
    }
    .category-page .article-list{
      display:grid;
      gap:22px;
    }
    .category-page .article-card{
      min-width:0;
      display:grid;
      grid-template-columns:320px minmax(0,1fr);
      overflow:hidden;
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 10px 30px rgba(31,46,78,.06);
      transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
    }
    .category-page .article-card:hover{
      transform:translateY(-3px);
      border-color:#bdcae2;
      box-shadow:var(--shadow);
    }
    .category-page .article-cover{
      position:relative;
      min-height:260px;
      overflow:hidden;
      background:#e7ecf5;
    }
    .category-page .article-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .4s ease;
    }
    .category-page .article-card:hover .article-cover img{transform:scale(1.035)}
    .category-page .category-badge{
      position:absolute;
      top:16px;
      left:16px;
      z-index:1;
      padding:6px 11px;
      color:#fff;
      background:var(--accent);
      border-radius:999px;
      font-size:12px;
      font-weight:800;
      box-shadow:0 5px 15px rgba(61,31,23,.18);
    }
    .category-page .article-body{
      min-width:0;
      display:flex;
      flex-direction:column;
      padding:25px 28px;
    }
    .category-page .article-meta{
      display:flex;
      flex-wrap:wrap;
      gap:7px 17px;
      margin-bottom:10px;
      color:var(--muted);
      font-size:13px;
    }
    .category-page .article-meta span{display:inline-flex;align-items:center}
    .category-page .article-meta span::before{
      content:"";
      width:5px;
      height:5px;
      margin-right:7px;
      background:#9eb3d9;
      border-radius:50%;
    }
    .category-page .article-title{
      margin:0;
      color:#1b2538;
      font-size:24px;
      line-height:1.35;
    }
    .category-page .article-title a:hover{color:var(--theme)}
    .category-page .article-summary{
      display:-webkit-box;
      overflow:hidden;
      margin:12px 0 15px;
      color:#596477;
      font-size:15px;
      line-height:1.8;
      -webkit-line-clamp:3;
      -webkit-box-orient:vertical;
    }
    .category-page .article-tags{
      min-height:24px;
      margin:0 0 18px;
      color:#758096;
      font-size:13px;
      overflow-wrap:anywhere;
    }
    .category-page .article-tags::before{
      content:"标签：";
      color:var(--theme);
      font-weight:700;
    }
    .category-page .article-actions{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      margin-top:auto;
      padding-top:16px;
      border-top:1px solid #edf0f5;
    }
    .category-page .article-author{
      min-width:0;
      color:#6b7588;
      font-size:13px;
      overflow-wrap:anywhere;
    }
    .category-page .read-more{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 15px;
      color:#fff;
      background:var(--theme);
      border-radius:9px;
      font-size:14px;
      font-weight:700;
    }
    .category-page .read-more::after{content:"→";transition:transform .2s ease}
    .category-page .read-more:hover::after{transform:translateX(3px)}
    .category-page .pagination{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:8px;
      margin-top:38px;
    }
    .category-page .pagination a{
      min-width:42px;
      height:42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 13px;
      color:#465166;
      background:#fff;
      border:1px solid var(--line);
      border-radius:9px;
      font-weight:700;
      transition:all .2s ease;
    }
    .category-page .pagination a:hover,
    .category-page .pagination a.active,
    .category-page .pagination a.current{
      color:#fff;
      background:var(--theme);
      border-color:var(--theme);
    }
    .category-page .category-note{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
      margin-top:46px;
      padding:28px 32px;
      color:#fff;
      background:linear-gradient(120deg,#252d3a,#3a4353);
      border-radius:20px;
    }
    .category-page .category-note h2{margin:0 0 5px;font-size:23px}
    .category-page .category-note p{margin:0;color:#d3d8e1}
    .category-page .category-note a{
      flex:0 0 auto;
      padding:11px 18px;
      color:#252d3a;
      background:var(--cream);
      border-radius:10px;
      font-weight:800;
    }

    .footer{
      color:#cbd5e6;
      background:#111827;
    }
    .footer-main{
      display:grid;
      grid-template-columns:1.45fr 1fr 1fr 1fr;
      gap:42px;
      padding:58px 0 42px;
    }
    .footer .logo{color:#fff}
    .footer .logo img{background:#fff}
    .footer-brand p{
      max-width:430px;
      margin:18px 0;
      color:#9eabc0;
      font-size:14px;
    }
    .footer-social{color:#fff}
    .footer h3{
      margin:4px 0 18px;
      color:#fff;
      font-size:16px;
    }
    .footer-links,.footer-contact{
      display:flex;
      flex-direction:column;
      align-items:flex-start;
      gap:10px;
      font-size:14px;
    }
    .footer-links a,.footer-contact a{transition:color .2s ease}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-contact span{color:#7f8da4;font-size:12px}
    .footer-bottom{
      min-height:70px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      border-top:1px solid #293245;
      color:#8d99ae;
      font-size:13px;
    }
    .footer-bottom-links{display:flex;flex-wrap:wrap;gap:18px}
    .footer-bottom-links a:hover{color:#fff}

    @media (max-width:1180px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
    }
    @media (max-width:900px){
      .category-page .article-card{grid-template-columns:270px minmax(0,1fr)}
      .category-page .article-title{font-size:21px}
      .footer-main{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start}
      .topbar-welcome{display:none}
      .topbar-contact{width:100%;justify-content:space-between;gap:10px}
      .member-entry{display:none}
      .account-entry{min-height:38px;padding:0 14px}
      .category-page .category-hero{padding:50px 0 44px}
      .category-page .category-intro{font-size:15px}
      .category-page .category-content{padding:40px 0 56px}
      .category-page .content-head{align-items:flex-start;flex-direction:column}
      .category-page .article-card{grid-template-columns:1fr}
      .category-page .article-cover{min-height:220px;aspect-ratio:16/9}
      .category-page .article-body{padding:21px}
      .category-page .article-summary{-webkit-line-clamp:3}
      .category-page .category-note{align-items:flex-start;flex-direction:column;padding:25px}
      .footer-main{grid-template-columns:1fr;gap:28px;padding:45px 0 35px}
      .footer-bottom{align-items:flex-start;flex-direction:column;padding:20px 0}
    }
    @media (max-width:430px){
      .topbar-contact{flex-direction:column;gap:2px}
      .header .logo span{max-width:130px;overflow:hidden;text-overflow:ellipsis}
      .header .logo img{width:38px;height:38px}
      .account-entry{display:none}
      .category-page .article-title{font-size:19px}
      .category-page .article-actions{align-items:flex-start;flex-direction:column}
      .category-page .read-more{width:100%;justify-content:center}
    }