:root{
  --primary:#0B3D91;
  --primary-dark:#082b67;
  --ink:#172033;
  --muted:#6d7788;
  --line:#e5e9f0;
  --surface:#ffffff;
  --soft:#f4f7fb;
  --accent:#d74b38;
  --shadow:0 18px 48px rgba(15,38,76,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#f7f9fc;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","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(1180px,calc(100% - 40px));margin:0 auto}

.topbar{background:#0a1830;color:#cbd5e7;font-size:13px}
.topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.topbar .contact{display:flex;gap:22px}
.topbar a{color:#dbe7fb}
.topbar a:hover{color:#fff}

.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:28px}
.logo{display:flex;align-items:center;gap:10px;min-width:max-content;font-weight:800;font-size:19px;color:var(--primary)}
.logo img{width:36px;height:36px;object-fit:contain}
.main-nav{margin-left:auto}
.nav-list{display:flex;align-items:stretch;gap:4px;list-style:none;margin:0;padding:0}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:6px;padding:27px 13px;font-size:14px;font-weight:650;white-space:nowrap}
.nav-link:hover,.nav-link:focus{color:var(--primary)}
.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:310px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;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;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.dropdown-panel>a:not(.mega-footer){display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 10px;border-radius:8px}
.dropdown-panel>a:not(.mega-footer):hover{background:var(--soft);color:var(--primary)}
.dropdown-panel strong{font-size:13px;line-height:1.4}
.dropdown-panel small{font-size:11px;color:var(--muted);white-space:nowrap}
.mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:12px}
.mega-card,.mega-grid>a:not(.mega-card){display:block;padding:13px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe;transition:.2s}
.mega-card:hover,.mega-grid>a:not(.mega-card):hover{border-color:#abc0e6;background:#f2f6fd;color:var(--primary)}
.mega-card img{width:28px;height:28px;object-fit:contain;margin-bottom:7px}
.mega-card strong{display:block;font-size:13px;line-height:1.5}
.mega-card small{display:block;margin-top:4px;color:var(--muted);font-size:11px;line-height:1.5}
.mega-grid>a:not(.mega-card){font-size:12px;text-align:center}
.mega-footer{display:block;padding:11px 12px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:700;text-align:right}
.header-btns{display:flex;align-items:center;gap:9px;white-space:nowrap}
.member-btn,.account-btn{padding:9px 13px;border-radius:7px;font-size:13px;font-weight:700}
.member-btn{color:var(--primary)}
.account-btn{background:var(--primary);color:#fff}
.account-btn:hover{background:var(--primary-dark)}
.hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
.hamburger span{display:block;width:22px;height:2px;background:var(--ink);margin:4px 0;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(5,17,35,.48);opacity:0;visibility:hidden;z-index:40;transition:.2s}
.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 ease;overflow:auto;box-shadow:-15px 0 45px rgba(0,0,0,.16)}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:14px;padding:19px 20px;border-bottom:1px solid var(--line)}
.drawer-head strong{margin-right:auto;color:var(--primary)}
.drawer-head a{font-size:13px;color:var(--primary);font-weight:700}
.drawer-close{border:0;background:#f1f4f8;border-radius:50%;width:30px;height:30px;cursor:pointer;font-size:22px;line-height:1;color:var(--muted)}
.drawer-menu{padding:10px 20px 30px}
.drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 2px;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:var(--ink);font-size:15px;cursor:pointer}
.drawer-toggle:after{content:"+";float:right;color:var(--primary);font-size:20px}
.drawer-toggle.active:after{content:"−"}
.drawer-submenu{display:none;padding:4px 0 7px 14px}
.drawer-submenu.open{display:block}
.drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}

.article-page{padding:44px 0 80px}
.article-wrap{display:grid;grid-template-columns:minmax(0,790px) 300px;gap:34px;align-items:start}
.article-main{min-width:0;background:#fff;border:1px solid var(--line);border-radius:16px;padding:38px 44px;box-shadow:0 12px 35px rgba(20,43,80,.05)}
.article-breadcrumb{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;margin-bottom:20px}
.article-breadcrumb a{color:var(--primary)}
.article-title{margin:0 0 18px;font-size:clamp(28px,4vw,44px);line-height:1.25;letter-spacing:-.03em;color:#111d31}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 20px;padding-bottom:24px;border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}
.article-meta strong{color:var(--ink);font-weight:600}
.article-cover{width:100%;max-height:460px;object-fit:cover;border-radius:12px;margin:28px 0 32px;background:#edf2f8}
.article-body{min-width:0;max-width:100%;overflow-x:auto;color:#344054;font-size:16px}
.article-body img,.article-body table{max-width:100%}
.article-body h2,.article-body h3{color:#14243d;line-height:1.4;margin:32px 0 14px}
.article-body p{margin:0 0 18px}
.article-body blockquote{margin:24px 0;padding:16px 20px;border-left:4px solid var(--primary);background:#f3f7fd;color:#40516b}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}
.article-tags span{color:var(--muted);font-size:13px}
.article-tags a{padding:5px 10px;border-radius:99px;background:#eef3fb;color:var(--primary);font-size:12px}
.article-pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.article-pager a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe}
.article-pager a:hover{border-color:#a8bee4;color:var(--primary)}
.article-pager small{display:block;color:var(--muted);font-size:12px;margin-bottom:5px}
.article-pager strong{font-size:14px;line-height:1.5}
.article-side{position:sticky;top:20px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 12px 35px rgba(20,43,80,.05);margin-bottom:18px}
.side-card h2{font-size:17px;margin:0 0 16px;color:#14243d}
.side-article{display:block;padding:13px 0;border-bottom:1px solid var(--line)}
.side-article:last-child{border-bottom:0;padding-bottom:0}
.side-article strong{display:block;font-size:14px;line-height:1.5}
.side-article small{display:block;color:var(--muted);font-size:12px;margin-top:5px}
.article-cta{background:var(--primary);color:#fff}
.article-cta h2{color:#fff}
.article-cta p{font-size:13px;color:#dbe7fb;margin:0 0 16px}
.article-cta a{display:inline-block;background:#fff;color:var(--primary);padding:9px 14px;border-radius:7px;font-size:13px;font-weight:700}

.footer{background:#0b1830;color:#c3cede;padding:50px 0 20px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
.footer-brand{font-size:21px;color:#fff;font-weight:800;margin-bottom:12px}
.footer p{margin:0 0 12px;font-size:13px;line-height:1.8}
.footer h3{color:#fff;font-size:15px;margin:0 0 14px}
.footer-grid>div>a{display:block;color:#b8c6d9;font-size:13px;margin:8px 0}
.footer-grid>div>a:hover{color:#fff}
.footer-bottom{margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);color:#8d9cb1;font-size:12px}

@media(max-width:1050px){
  .main-nav{display:none}
  .hamburger{display:block}
  .article-wrap{grid-template-columns:minmax(0,1fr) 270px}
}
@media(max-width:760px){
  .container{width:min(100% - 28px,620px)}
  .topbar .container{min-height:42px;align-items:flex-start;flex-direction:column;justify-content:center;gap:0}
  .topbar .contact{gap:12px;font-size:11px}
  .header-inner{min-height:64px;gap:12px}
  .header-btns{margin-left:auto}
  .member-btn{display:none}
  .account-btn{padding:8px 10px}
  .article-page{padding:24px 0 50px}
  .article-wrap{display:block}
  .article-main{padding:25px 20px;border-radius:12px}
  .article-title{font-size:30px}
  .article-cover{margin:22px 0}
  .article-body{font-size:15px}
  .article-side{position:static;margin-top:20px}
  .article-pager{grid-template-columns:1fr}
  .footer{padding-top:35px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
}
@media(max-width:460px){
  .footer-grid{grid-template-columns:1fr}
  .article-meta{display:block}
  .article-meta span{display:inline-block;margin:0 14px 7px 0}
}