:root{--theme:#0B3D91;--ink:#172033;--muted:#687386;--line:#e5e9f0;--soft:#f5f7fb;--white:#fff;--shadow:0 16px 44px rgba(22,43,77,.1)}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:#fff;line-height:1.7}
    body.drawer-locked{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1200px,calc(100% - 40px));margin:auto}
    .topbar{background:#0d1a31;color:#dbe6fa;font-size:13px}
    .topbar-inner{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar-contact{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:78px;display:flex;align-items:center;gap:30px}
    .logo{display:inline-flex;align-items:center;gap:10px;white-space:nowrap;font-weight:800;font-size:20px;color:#10264e}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:27px 13px;font-size:15px;color:#27344b;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow:after{content:"";display:inline-block;width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg);margin:0 0 3px 8px}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);padding-top:10px;opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:30}
    .dropdown-panel{width:330px}
    .mega-menu{width:min(780px,calc(100vw - 30px))}
    .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;top:0;left:0;right:0;height:12px}
    .dropdown-shell,.mega-shell{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:var(--shadow)}
    .dropdown-title,.mega-title{font-size:14px;color:var(--theme);font-weight:700;margin:0 0 13px}
    .dropdown-list{display:grid;gap:9px}
    .dropdown-list a,.mega-category-links a{font-size:14px;color:#39465a}
    .dropdown-list a:hover,.mega-category-links a:hover{color:var(--theme)}
    .mega-layout{display:grid;grid-template-columns:155px 1fr;gap:25px}
    .mega-category-links{display:grid;gap:11px}
    .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:8px;min-width:0}
    .mega-card:hover{border-color:#b8c9e8;background:#f7faff}
    .mega-card img{width:34px;height:34px;object-fit:contain;border-radius:5px;flex:0 0 auto}
    .mega-card strong{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card span{min-width:0}
    .mega-stats,.mega-summary{display:block;color:var(--muted);font-size:11px;line-height:1.55}
    .mega-stats span{display:inline-block;margin-right:5px}
    .mega-footer{display:block;border-top:1px solid var(--line);margin-top:17px;padding-top:13px;color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:14px;white-space:nowrap;font-size:14px}
    .header-btns>a:first-of-type{background:var(--theme);color:#fff;border-radius:7px;padding:9px 15px}
    .hamburger{display:none;border:0;background:transparent;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:#21314a;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{position:fixed;inset:0;background:rgba(5,16,35,.5);opacity:0;visibility:hidden;z-index:40;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(380px,88vw);height:100vh;background:#fff;z-index:41;transform:translateX(100%);transition:.25s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:72px;display:flex;align-items:center;gap:18px;padding:0 20px;border-bottom:1px solid var(--line);font-size:14px}
    .drawer-head>a{margin-left:auto;color:var(--theme)}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;cursor:pointer;color:#516077}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf0f5;background:none;text-align:left;color:#263650;font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
    .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:var(--muted);font-size:14px}
    .footer{margin-top:80px;background:#101d34;color:#b8c5d9}
    .footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px;padding:55px 0 42px}
    .footer .logo{color:#fff;margin-bottom:15px}
    .footer-brand p{font-size:13px;line-height:1.9;margin:0 0 18px;color:#aebbd0}
    .footer h3{color:#fff;font-size:15px;margin:5px 0 18px}
    .footer-links{display:grid;gap:9px;font-size:13px}
    .footer-links a:hover,.footer a:hover{color:#fff}
    .footer-contact{display:grid;gap:12px;font-size:13px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#8f9eb5}
    .article-page{padding:52px 0 0;background:linear-gradient(180deg,#f7f9fd 0,#fff 420px)}
    .article-layout{display:grid;grid-template-columns:minmax(0,820px) 300px;gap:42px;align-items:start}
    .article-main{min-width:0}
    .article-breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}
    .article-breadcrumb a{color:var(--theme)}
    .article-header{background:#fff;border:1px solid var(--line);border-radius:16px;padding:34px 38px 28px;box-shadow:0 8px 28px rgba(19,44,82,.05)}
    .article-category{display:inline-flex;padding:5px 11px;border-radius:4px;background:#eaf1ff;color:var(--theme);font-size:12px;font-weight:700}
    .article-title{font-size:clamp(27px,4vw,42px);line-height:1.25;letter-spacing:-.02em;margin:17px 0 16px;color:#152642}
    .article-meta{display:flex;flex-wrap:wrap;gap:18px;color:var(--muted);font-size:13px;border-top:1px solid var(--line);padding-top:16px}
    .article-cover{margin-top:22px;border-radius:12px;overflow:hidden;background:#edf2fa}
    .article-cover img{width:100%;max-height:440px;object-fit:cover}
    .article-body{background:#fff;padding:30px 4px 10px;min-width:0;max-width:100%;overflow-x:auto;font-size:16px;color:#354258}
    .article-body p{margin:0 0 1.35em}
    .article-body h2,.article-body h3{color:#142a4b;line-height:1.4;margin:1.7em 0 .65em}
    .article-body h2{font-size:25px;border-left:4px solid var(--theme);padding-left:12px}
    .article-body h3{font-size:20px}
    .article-body img,.article-body video{max-width:100%;height:auto}
    .article-body table{width:100%;border-collapse:collapse;margin:20px 0}
    .article-body th,.article-body td{border:1px solid var(--line);padding:10px;text-align:left}
    .article-tags{display:flex;flex-wrap:wrap;gap:8px;border-top:1px solid var(--line);padding:22px 0}
    .article-tags a{font-size:13px;color:var(--theme);background:#edf3ff;padding:5px 10px;border-radius:20px}
    .article-nav{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:12px}
    .article-nav a{padding:17px;background:#f5f7fb;border:1px solid var(--line);border-radius:10px;font-size:14px}
    .article-nav a:last-child{text-align:right}
    .article-nav span{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}
    .article-sidebar{position:sticky;top:18px}
    .side-card{background:#fff;border:1px solid var(--line);border-radius:13px;padding:22px;margin-bottom:18px}
    .side-card h2{font-size:17px;color:#182e50;margin:0 0 17px;padding-left:11px;border-left:3px solid var(--theme)}
    .side-links{display:grid;gap:14px}
    .side-links a{font-size:14px;line-height:1.55;color:#354258}
    .side-links a:hover{color:var(--theme)}
    .side-links small{display:block;color:#8a96a8;font-size:12px;margin-top:4px}
    .like-grid{display:grid;gap:13px}
    .like-item{font-size:13px;border-bottom:1px solid #edf0f5;padding-bottom:12px}
    .like-item:last-child{border:0;padding-bottom:0}
    .article-share{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;padding:14px 0}
    .article-share span{background:#eef3fb;color:var(--theme);padding:4px 10px;border-radius:4px}
    @media(max-width:1120px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .article-layout{grid-template-columns:minmax(0,1fr) 270px}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,1200px)}
      .topbar-inner{height:auto;min-height:38px;padding:7px 0;align-items:flex-start;gap:7px}
      .topbar-contact{gap:9px;flex-direction:column;text-align:right}
      .header,.header-inner{height:68px}
      .header-btns>a:first-of-type{display:none}
      .header-btns{gap:5px}
      .article-page{padding-top:28px}
      .article-layout{display:block}
      .article-sidebar{position:static;margin-top:28px}
      .article-header{padding:24px 20px 21px}
      .article-title{font-size:28px}
      .article-body{padding-top:24px;font-size:15px}
      .article-nav{grid-template-columns:1fr}
      .article-nav a:last-child{text-align:left}
      .footer-main{grid-template-columns:1fr 1fr;gap:28px;padding:38px 0}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block;line-height:2}
      .footer-bottom span{display:block}
    }
    @media(max-width:460px){
      .logo span{font-size:17px}
      .topbar{font-size:11px}
      .footer-main{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
    }