:root{
      --theme:#0B3D91;
      --theme-deep:#082d6c;
      --ink:#14233b;
      --muted:#6b778c;
      --line:#e4e9f1;
      --paper:#f5f7fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(15,44,88,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);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(1200px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#071a3a;color:#dce8ff;font-size:13px}
    .topbar .container{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar a{color:#dce8ff;margin-left:20px}
    .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:32px}
    .logo{display:flex;align-items:center;gap:10px;min-width:185px;font-size:20px;font-weight:800;color:var(--theme)}
    .logo img{width:36px;height:36px;object-fit:contain;border-radius:9px}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:5px;padding:0;margin:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:76px;padding:0 15px;font-size:15px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg);margin:0 0 4px 8px}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);width:270px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);padding:16px;opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}
    .mega-menu{width:620px}
    .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}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-panel>a:not(.mega-footer){display:block;padding:9px 10px;border-radius:8px;font-size:14px}
    .dropdown-panel>a:not(.mega-footer):hover{background:#edf3ff;color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;min-height:108px;padding:10px;border:1px solid var(--line);border-radius:11px;background:#fbfcff;transition:.2s}
    .mega-card:hover{border-color:#9eb7e5;background:#f0f5ff;transform:translateY(-2px)}
    .mega-card img{height:34px;width:42px;object-fit:contain;margin-bottom:6px;border-radius:5px}
    .mega-card strong{display:block;font-size:13px;line-height:1.4}
    .mega-card small{display:block;margin-top:4px;color:var(--muted);font-size:11px;line-height:1.5}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-weight:700;font-size:13px;text-align:center}
    .header-btns{display:flex;align-items:center;gap:14px;white-space:nowrap}
    .account-link,.header-btns>a:not(.account-link){color:var(--theme);font-size:14px;font-weight:700}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
    .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{display:none}
    .mobile-drawer{display:none}

    .article-page{padding:42px 0 80px}
    .article-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:28px;align-items:start}
    .article-main,.article-sidebar{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 32px rgba(18,45,84,.05)}
    .article-main{padding:42px 48px}
    .article-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:13px;margin-bottom:20px}
    .article-breadcrumb a:hover{color:var(--theme)}
    .article-title{font-size:clamp(28px,4vw,44px);line-height:1.25;letter-spacing:-.02em;margin:0 0 18px;color:#10264b}
    .article-meta{display:flex;flex-wrap:wrap;gap:18px;padding:15px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}
    .article-meta strong{color:var(--ink);font-weight:600}
    .article-cover{margin:28px 0;border-radius:14px;overflow:hidden;background:#edf2fa}
    .article-cover img{width:100%;max-height:440px;object-fit:cover}
    .article-summary{padding:18px 20px;margin:0 0 28px;border-left:4px solid var(--theme);background:#f3f7ff;color:#40516d;font-size:16px}
    .article-content{min-width:0;max-width:100%;overflow-x:auto;font-size:16px;color:#34435b}
    .article-content h2,.article-content h3{color:#122b55;line-height:1.4;margin:32px 0 14px}
    .article-content p{margin:0 0 20px}
    .article-content img,.article-content table{max-width:100%}
    .article-content table{border-collapse:collapse}
    .article-content th,.article-content td{border:1px solid var(--line);padding:10px}
    .article-content blockquote{margin:24px 0;padding:18px 22px;border-radius:10px;background:#f7f9fc;color:#53647f}
    .article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px;padding-top:22px;border-top:1px solid var(--line)}
    .article-tags a{padding:5px 12px;background:#eef3fb;color:var(--theme);border-radius:20px;font-size:13px}
    .article-tags a:hover{background:var(--theme);color:#fff}
    .article-pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
    .pager-item{padding:16px;border:1px solid var(--line);border-radius:12px;background:#fbfcff}
    .pager-item.next{text-align:right}
    .pager-label{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}
    .pager-item a{display:block;color:var(--theme);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .article-sidebar{padding:22px;position:sticky;top:20px}
    .sidebar-title{font-size:19px;margin:0 0 16px;color:#122b55}
    .sidebar-line{display:block;padding:13px 0;border-bottom:1px solid var(--line)}
    .sidebar-line:last-child{border-bottom:0}
    .sidebar-line strong{display:block;font-size:14px;line-height:1.5}
    .sidebar-line small{display:block;color:var(--muted);font-size:12px;margin-top:4px}
    .sidebar-line:hover strong{color:var(--theme)}
    .like-section{margin-top:28px;padding-top:25px;border-top:1px solid var(--line)}
    .footer{background:#081a39;color:#c7d5ec;padding:52px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
    .footer h3{color:#fff;font-size:16px;margin:0 0 15px}
    .footer p{margin:0 0 10px;color:#aebed8;font-size:13px}
    .footer a{display:block;width:max-content;max-width:100%;margin:7px 0;color:#b8c8e0;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.13);margin-top:35px;padding-top:18px;color:#8ea3c3;font-size:12px;text-align:center}

    @media(max-width:1050px){
      .header-inner{gap:12px}
      .logo{min-width:150px}
      .nav-link{padding:0 9px}
      .mega-menu{width:560px}
    }
    @media(max-width:800px){
      .container{width:min(100% - 28px,680px)}
      .topbar .container{height:auto;min-height:38px;padding:8px 0;align-items:flex-start;gap:4px;flex-direction:column}
      .topbar a{margin-left:0;margin-right:14px}
      .header-inner{min-height:66px}
      .main-nav{display:none}
      .header-btns{margin-left:auto}
      .hamburger{display:block}
      .mobile-drawer{display:block;position:fixed;z-index:100;right:0;top:0;bottom:0;width:min(88vw,360px);background:#fff;transform:translateX(100%);transition:.25s ease;overflow-y:auto;box-shadow:-15px 0 35px rgba(0,0,0,.16)}
      .mobile-drawer.open{transform:translateX(0)}
      .drawer-overlay{display:block;position:fixed;z-index:90;inset:0;background:rgba(3,16,37,.5);opacity:0;visibility:hidden;transition:.25s}
      .drawer-overlay.open{opacity:1;visibility:visible}
      .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:700}
      .drawer-head>a{margin-left:auto;color:var(--theme);font-size:14px}
      .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;color:var(--ink);cursor:pointer}
      .drawer-menu{padding:10px 20px 30px}
      .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:var(--ink);font-weight:600;cursor:pointer}
      .drawer-toggle:after{content:"+";float:right;color:var(--muted);font-size:20px;line-height:1}
      .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:var(--muted);font-size:14px}
      .article-page{padding:24px 0 55px}
      .article-layout{display:block}
      .article-main{padding:27px 20px}
      .article-sidebar{position:static;margin-top:20px}
      .article-title{font-size:30px}
      .article-pager{grid-template-columns:1fr}
      .pager-item.next{text-align:left}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
    }
    @media(max-width:480px){
      .logo{min-width:0;font-size:17px}
      .logo img{width:30px;height:30px}
      .account-link{display:none}
      .article-main{padding:24px 16px}
      .article-title{font-size:26px}
      .article-meta{gap:8px 14px}
      .article-content{font-size:15px}
      .footer-grid{grid-template-columns:1fr}
    }