:root{--主题色:#0B3D91;--深靛:#071b49;--海蓝:#1d72c9;--浅蓝:#eef6ff;--线:#dbe7f5;--墨:#12233f;--灰:#61718a;--白:#fff;--圆:18px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--墨);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:#f7faff;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:auto}
    .topbar{background:var(--深靛);color:#c9dbf4;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(--线);position:relative;z-index:20}
    .header-inner{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--深靛);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;padding:0;margin:0}
    .nav-item{position:relative}.nav-link{display:block;padding:25px 13px;font-size:14px;font-weight:600;white-space:nowrap}
    .nav-link:hover{color:var(--主题色)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8b9bb2}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--线);box-shadow:0 18px 48px #0b3d9120;border-radius:0 0 16px 16px;opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .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{width:280px;padding:20px}.dropdown-title{font-weight:800;margin:0 0 12px;color:var(--深靛)}
    .dropdown-panel article{padding:9px 0;border-bottom:1px solid var(--线);font-size:13px}
    .dropdown-panel article a:hover{color:var(--海蓝)}.dropdown-more,.mega-footer{display:block;color:var(--主题色);font-weight:700;font-size:13px;margin-top:14px}
    .mega-menu{width:850px;padding:24px}.mega-title-row{display:flex;justify-content:space-between;gap:20px;margin-bottom:17px}.mega-title-row strong{font-size:17px}.mega-title-row span{font-size:12px;color:var(--灰)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.mega-card{border:1px solid var(--线);border-radius:12px;padding:12px;min-width:0}.mega-card:hover{border-color:var(--海蓝);background:var(--浅蓝)}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:7px}.mega-card strong{display:block;font-size:13px}.mega-card p{font-size:12px;color:var(--灰);margin:4px 0;line-height:1.5}.mega-meta{display:flex;flex-wrap:wrap;gap:7px;color:var(--灰);font-size:11px}.mega-categories{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 15px}.mega-categories a{padding:4px 10px;border-radius:30px;background:var(--浅蓝);font-size:12px;color:var(--主题色)}
    .header-btns{display:flex;align-items:center;gap:12px}.header-account{font-size:13px;color:var(--主题色);font-weight:700}.header-open{background:var(--主题色);color:#fff;padding:8px 16px;border-radius:22px;font-size:13px;font-weight:700}
    .hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}.hamburger span{width:23px;height:2px;background:var(--深靛);display:block;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;position:fixed;inset:0;background:#06163399;z-index:50}.drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:60;right:0;top:0;height:100%;width:min(360px,88vw);background:#fff;transform:translateX(100%);transition:.25s;overflow:auto}.mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:72px;padding:0 20px;display:flex;align-items:center;gap:16px;border-bottom:1px solid var(--线);font-weight:700}.drawer-head>a{margin-left:auto;background:var(--主题色);color:#fff;border-radius:20px;padding:5px 13px;font-size:13px}.drawer-close{border:0;background:none;font-size:28px;color:var(--灰);cursor:pointer}.drawer-menu{padding:15px 20px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--线);background:none;text-align:left;color:var(--墨);font-weight:600;cursor:pointer}.drawer-toggle:after{content:"＋";float:right;color:var(--灰)}.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:7px 0;color:var(--灰);font-size:13px}
    .product-page{padding:42px 0 70px;min-height:620px}.crumbs{font-size:13px;color:var(--灰);margin-bottom:24px}.crumbs a{color:var(--主题色)}
    .product-shell{background:#fff;border:1px solid var(--线);border-radius:24px;padding:clamp(22px,4vw,52px);box-shadow:0 18px 60px #0b3d910b}
    .product-head{display:grid;grid-template-columns:260px minmax(0,1fr);gap:42px;align-items:center;border-bottom:1px solid var(--线);padding-bottom:35px}
    .product-cover{height:230px;background:linear-gradient(145deg,#e8f3ff,#f9fcff);border:1px solid var(--线);border-radius:20px;display:grid;place-items:center;padding:25px}.product-cover img{max-height:180px;object-fit:contain}
    .product-kicker{color:var(--海蓝);font-size:13px;font-weight:700;letter-spacing:.08em}.product-title{font-size:clamp(28px,4vw,46px);line-height:1.25;margin:8px 0 14px;color:var(--深靛)}.product-summary{font-size:17px;color:var(--灰);margin:0 0 20px}.product-meta{display:flex;flex-wrap:wrap;gap:18px;color:var(--灰);font-size:13px}.product-meta b{color:var(--墨)}
    .product-body-wrap{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:42px;padding-top:35px}.product-body{min-width:0;max-width:100%;overflow-x:auto;color:#31435e}.product-body h2,.product-body h3{color:var(--深靛);margin-top:28px}.product-body img,.product-body table{max-width:100%}.product-body table{border-collapse:collapse}.product-body td,.product-body th{border:1px solid var(--线);padding:8px 12px}
    .product-aside{background:var(--浅蓝);border-radius:16px;padding:20px;height:max-content}.product-aside h3{margin:0 0 13px;color:var(--深靛)}.aside-link{display:block;padding:11px 0;border-bottom:1px solid #cfe0f3;font-size:13px}.aside-link:hover{color:var(--主题色)}
    .footer{background:var(--深靛);color:#c7d7ec}.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px;padding:54px 0 40px}.footer .logo{color:#fff}.footer-brand p{font-size:13px;line-height:1.8;color:#9fb4d0;max-width:310px}.footer h3{font-size:15px;color:#fff;margin:4px 0 15px}.footer-links{display:grid;gap:8px;font-size:13px}.footer-links a:hover,.footer-contact a:hover{color:#fff}.footer-contact{display:grid;gap:9px;font-size:13px}.footer-bottom{border-top:1px solid #294166;padding:17px 0;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#91a8c5}
    @media(max-width:1100px){.main-nav{display:none}.hamburger{display:block}.header-btns{margin-left:auto}.footer-main{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:700px){.container{width:min(100% - 28px,1180px)}.topbar-inner{height:auto;min-height:38px;padding:7px 0;align-items:flex-start;gap:8px}.topbar-contact{gap:8px;flex-direction:column;text-align:right;font-size:11px}.header,.header-inner{height:68px}.header-inner{gap:10px}.header-account{display:none}.header-open{padding:7px 12px}.product-page{padding:25px 0 45px}.product-head{grid-template-columns:1fr;gap:22px}.product-cover{height:170px}.product-cover img{max-height:120px}.product-body-wrap{grid-template-columns:1fr;gap:26px}.footer-main{grid-template-columns:1fr;gap:25px;padding:38px 0 28px}.footer-bottom{flex-direction:column;gap:5px}.mega-menu{width:calc(100vw - 28px)}}