:root{
      --主题色:#0B3D91;
      --深色:#101827;
      --文字:#1d2939;
      --浅色:#f5f7fb;
      --边框:#e4e9f1;
      --强调:#f2a900;
      --最大宽度:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:#f7f9fc;color:var(--文字);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(var(--最大宽度),calc(100% - 40px));margin:0 auto}

    .topbar{background:#0b1730;color:#d8e3f5;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:20px}
    .topbar a{color:#d8e3f5}
    .topbar a:hover{color:#fff}

    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--边框);box-shadow:0 4px 18px rgba(19,47,87,.05)}
    .header-inner{height:76px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--深色);font-weight:800;font-size:19px}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 14px;color:#344054;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--主题色)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .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(--边框);border-radius:0 0 12px 12px;box-shadow:0 18px 40px rgba(16,24,40,.15);opacity:0;visibility:hidden;transition:.2s ease}
    .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;top:-12px;height:12px}
    .drop-title,.mega-title{margin:0 0 14px;color:var(--主题色);font-size:15px;font-weight:800}
    .drop-list,.mega-links{display:grid;gap:8px}
    .drop-list a,.mega-links a{padding:7px 8px;border-radius:6px;color:#475467;font-size:14px}
    .drop-list a:hover,.mega-links a:hover{background:#f0f5ff;color:var(--主题色)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;align-items:center;gap:10px;padding:10px;border:1px solid #edf0f5;border-radius:8px}
    .mega-card:hover{border-color:#aac2e8;background:#f7faff}
    .mega-card img{width:34px;height:34px;object-fit:contain}
    .mega-card span{display:grid;gap:2px;min-width:0}
    .mega-card strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small,.mega-links small{font-size:11px;color:#98a2b3}
    .mega-columns{display:grid;grid-template-columns:1fr 1fr;gap:28px}
    .mega-footer{display:block;margin-top:16px;padding-top:13px;border-top:1px solid var(--边框);color:var(--主题色);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-btn{padding:8px 14px;border-radius:6px;background:var(--主题色);color:#fff;font-size:13px}
    .account-link{color:var(--主题色);font-size:14px;font-weight:700}
    .hamburger{display:none;width:38px;height:36px;padding:8px;border:1px solid var(--边框);border-radius:6px;background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--深色);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{position:fixed;inset:0;background:rgba(8,20,42,.5);opacity:0;visibility:hidden;z-index:50;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(360px,88vw);background:#fff;z-index:51;transform:translateX(100%);transition:.25s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--边框)}
    .drawer-head strong{flex:1;color:var(--主题色)}
    .drawer-head a{font-size:13px;color:var(--主题色)}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;cursor:pointer;color:#667085}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #f0f2f5;background:none;text-align:left;color:#344054;font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#98a2b3}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 8px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:#667085;font-size:14px}

    .category-page{padding:54px 0 76px}
    .category-hero{padding:42px 36px;border-radius:18px;background:linear-gradient(135deg,#0b3d91,#173d78 58%,#14233d);color:#fff;box-shadow:0 16px 40px rgba(11,61,145,.16)}
    .category-hero .eyebrow{margin:0 0 10px;color:#b9d4ff;font-size:13px;letter-spacing:2px}
    .category-hero h1{margin:0 0 12px;font-size:clamp(28px,4vw,44px);line-height:1.25}
    .category-hero p{max-width:760px;margin:0;color:#d7e4f8;font-size:16px}
    .category-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
    .category-meta span{padding:6px 12px;border:1px solid rgba(255,255,255,.25);border-radius:30px;color:#e7f0ff;font-size:13px}
    .article-list{display:grid;gap:22px;margin-top:34px}
    .article-card{display:grid;grid-template-columns:300px 1fr;gap:25px;padding:20px;background:#fff;border:1px solid var(--边框);border-radius:14px;box-shadow:0 7px 22px rgba(16,24,40,.04);transition:.2s}
    .article-card:hover{transform:translateY(-3px);border-color:#b6c9e7;box-shadow:0 14px 30px rgba(16,24,40,.08)}
    .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}
    .article-label{display:inline-flex;align-self:flex-start;margin-bottom:8px;padding:3px 9px;border-radius:20px;background:#edf4ff;color:var(--主题色);font-size:12px}
    .article-title{margin:0 0 9px;font-size:21px;line-height:1.4;color:#152238}
    .article-title a:hover{color:var(--主题色)}
    .article-summary{display:-webkit-box;overflow:hidden;margin:0;color:#667085;font-size:14px;line-height:1.8;-webkit-box-orient:vertical;-webkit-line-clamp:3}
    .article-info{display:flex;flex-wrap:wrap;gap:15px;margin-top:14px;color:#98a2b3;font-size:12px}
    .article-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:11px;color:#667085;font-size:12px}
    .article-tags span{padding:2px 7px;border:1px solid #e8edf4;border-radius:4px}
    .article-actions{margin-top:auto;padding-top:16px}
    .read-more{display:inline-flex;align-items:center;gap:6px;color:var(--主题色);font-weight:700;font-size:13px}
    .read-more:after{content:"→";font-size:17px}
    .pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:38px}
    .pagination a{min-width:36px;padding:6px 11px;text-align:center;border:1px solid var(--边框);border-radius:6px;background:#fff;color:#667085;font-size:13px}
    .pagination a:hover,.pagination a.active{background:var(--主题色);border-color:var(--主题色);color:#fff}

    .footer{background:#101827;color:#b9c4d4;padding:52px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
    .footer-brand strong{display:block;margin-bottom:12px;color:#fff;font-size:19px}
    .footer p{margin:7px 0;font-size:13px;line-height:1.8}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:7px 0;color:#b9c4d4;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#8793a5}

    @media (max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{justify-content:space-between}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,var(--最大宽度))}
      .topbar .container{min-height:44px;align-items:flex-start;flex-direction:column;justify-content:center;gap:0}
      .topbar-links{display:none}
      .header-inner{height:66px;gap:10px}
      .logo{min-width:0;font-size:16px}
      .logo img{width:32px;height:32px}
      .account-link{display:none}
      .category-page{padding:28px 0 48px}
      .category-hero{padding:28px 22px}
      .category-hero h1{font-size:30px}
      .article-card{grid-template-columns:1fr;gap:17px;padding:14px}
      .article-cover{height:190px}
      .article-title{font-size:18px}
      .article-actions{margin-top:0}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:7px}
    }