:root{--primary:#0B3D91;--navy:#082b63;--ink:#17243b;--muted:#66758d;--line:#dce5f0;--bg:#f4f7fb;--white:#fff;--orange:#ff8a25;--shadow:0 18px 45px rgba(11,61,145,.12)}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:var(--bg);line-height:1.7}a{color:inherit;text-decoration:none}button{font:inherit}.container{width:min(1180px,calc(100% - 40px));margin:auto}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:20px;top:10px;z-index:100;background:#fff;padding:8px 14px}
    .topbar{background:#062453;color:#bcd0ef;font-size:13px}.topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between}.topbar a{color:#fff;margin-left:22px}
    .header{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{min-height:78px;display:flex;align-items:center;gap:28px}.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--primary);white-space:nowrap}.logo img{width:38px;height:38px;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 14px;font-size:15px;font-weight:600;color:#253653}.nav-link:hover,.nav-link:focus{color:var(--primary)}.has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8190a7}.dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);width:330px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 14px 14px;padding:20px;opacity:0;visibility:hidden;transition:.2s;z-index:30}.mega-menu{width:760px}.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}.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}.dropdown-title,.mega-heading strong{display:block;font-size:16px;color:var(--navy);margin-bottom:3px}.mega-heading span{font-size:12px;color:var(--muted)}.dropdown-article{display:block;border-top:1px solid var(--line);padding:9px 0;font-size:13px}.dropdown-more,.mega-footer{display:block;margin-top:12px;color:var(--primary);font-size:13px;font-weight:700}.mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}.mega-card{display:flex;gap:8px;padding:9px;border:1px solid var(--line);border-radius:9px;min-width:0}.mega-card img{width:38px;height:38px;object-fit:contain;border-radius:6px}.mega-card-content{min-width:0}.mega-card strong{display:block;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mega-card p{font-size:11px;color:var(--muted);margin:2px 0;line-height:1.45}.mega-card-meta{display:flex;gap:7px;flex-wrap:wrap;color:#71819a;font-size:10px}.mega-categories{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}.mega-categories a{background:#edf4ff;color:var(--primary);padding:3px 9px;border-radius:99px;font-size:11px}.header-btns{display:flex;align-items:center;gap:12px;font-size:13px;white-space:nowrap}.header-btns>a{color:var(--primary);font-weight:700}.header-btns>a:first-child{background:#e9f1ff;padding:7px 12px;border-radius:7px}.hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}.hamburger span{display:block;width:23px;height:2px;background:var(--primary);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}
    .product-page{padding:42px 0 76px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}.breadcrumb a{color:var(--primary)}.product-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.95fr);gap:48px;background:#fff;padding:42px;border-radius:22px;box-shadow:var(--shadow);align-items:center}.product-cover{min-height:320px;border-radius:18px;background:linear-gradient(140deg,#e9f3ff,#fff4e8);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.product-cover:before,.product-cover:after{content:"";position:absolute;border-radius:50%;background:rgba(11,61,145,.1)}.product-cover:before{width:280px;height:280px;right:-70px;top:-70px}.product-cover:after{width:180px;height:180px;left:-55px;bottom:-45px;background:rgba(255,138,37,.16)}.product-cover img{position:relative;z-index:1;width:min(62%,260px);max-height:230px;object-fit:contain}.product-kicker{color:var(--orange);font-size:13px;font-weight:800;letter-spacing:1px}.product-title{font-size:clamp(30px,4vw,48px);line-height:1.2;margin:10px 0 16px;color:var(--navy)}.product-summary{font-size:17px;color:#52647e;margin:0 0 24px}.product-meta{display:flex;gap:18px;flex-wrap:wrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px 0;color:var(--muted);font-size:13px}.product-meta strong{display:block;color:var(--ink);font-size:15px}.product-actions{display:flex;gap:12px;margin-top:25px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:11px 21px;font-weight:700;border:1px solid var(--primary);color:var(--primary)}.btn-primary{color:#fff;background:var(--primary)}.product-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;margin-top:30px}.content-card,.related-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px}.section-title{font-size:22px;color:var(--navy);margin:0 0 20px}.product-body{min-width:0;max-width:100%;overflow-x:auto;color:#40516b}.product-body img,.product-body video{max-width:100%;height:auto}.product-body table{max-width:100%;display:block;overflow-x:auto;border-collapse:collapse}.product-body h2,.product-body h3{color:var(--navy)}.product-body blockquote{margin:20px 0;padding:15px 18px;border-left:4px solid var(--orange);background:#fff7ed}.product-side{display:grid;gap:20px;align-content:start}.side-note{background:#092c67;color:#fff;border-radius:16px;padding:24px}.side-note h3{margin:0 0 8px}.side-note p{color:#cbdafa;font-size:13px}.related-card{padding:22px}.related-item{display:block;padding:13px 0;border-bottom:1px solid var(--line)}.related-item:last-child{border-bottom:0}.related-item strong{display:block;color:var(--navy);font-size:14px}.related-item span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
    .footer{background:#071f48;color:#c8d5e9}.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;padding:48px 0 36px}.footer .logo{color:#fff}.footer-brand p{font-size:13px;line-height:1.8;color:#aebfd9;max-width:330px}.footer h3{color:#fff;font-size:15px;margin:0 0 14px}.footer-links{display:grid;gap:7px;font-size:13px}.footer-links a:hover,.footer-contact a:hover{color:#fff}.footer-contact{display:grid;gap:7px;font-size:13px}.footer-social{margin-top:8px;display:grid;gap:5px}.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:18px 0;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#91a7c7}.footer-bottom-links{display:flex;gap:18px}
    @media(max-width:1050px){.main-nav{display:none}.header-btns{margin-left:auto}.hamburger{display:block}.mega-menu{width:min(760px,calc(100vw - 30px))}.mobile-drawer{display:block;position:fixed;z-index:50;right:-360px;top:0;width:min(360px,88vw);height:100vh;background:#fff;overflow:auto;transition:.25s;box-shadow:-12px 0 30px rgba(0,0,0,.15)}.mobile-drawer.open{right:0}.drawer-overlay{position:fixed;inset:0;background:rgba(2,18,45,.48);z-index:40}.drawer-overlay.open{display:block}.drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);color:var(--primary);font-weight:700}.drawer-head>a{margin-left:auto;color:var(--orange)}.drawer-close{border:0;background:none;font-size:28px;color:var(--muted);cursor:pointer}.drawer-menu{padding:10px 20px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:var(--ink);font-weight:600}.drawer-toggle:after{content:"＋";float:right;color:var(--primary)}.drawer-toggle.active:after{content:"－"}.drawer-submenu{display:none;padding:5px 0 8px 15px}.drawer-submenu.open{display:block}.drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}.product-hero{grid-template-columns:1fr;gap:28px}.product-cover{min-height:260px}}
    @media(max-width:700px){.container{width:min(100% - 28px,1180px)}.topbar-inner{padding:7px 0;display:block}.topbar-contact{margin-top:3px}.topbar a{margin:0 15px 0 0}.header-inner{min-height:68px}.logo{font-size:17px}.logo img{width:32px;height:32px}.product-page{padding-top:25px}.product-hero{padding:22px;border-radius:15px}.product-title{font-size:31px}.product-summary{font-size:15px}.product-layout{grid-template-columns:1fr}.content-card{padding:22px}.footer-main{grid-template-columns:1fr 1fr;gap:26px;padding:36px 0}.footer-brand{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom-links{margin-top:8px;display:grid;gap:4px}.mega-grid{grid-template-columns:1fr 1fr}}