:root{--blue:#0B3D91;--ink:#142033;--muted:#667085;--line:#e5eaf1;--bg:#f5f7fb;--white:#fff;--shadow:0 18px 50px rgba(20,32,51,.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:var(--bg);line-height:1.7}a{color:inherit;text-decoration:none}button{font:inherit}img{max-width:100%;display:block}.container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#0b1830;color:#dbe6f7;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{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{height:78px;display:flex;align-items:center;gap:32px}.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--blue);white-space:nowrap}.logo img{width:38px;height:38px;object-fit:contain}.main-nav{flex:1}.nav-list{display:flex;list-style:none;padding:0;margin:0;align-items:center;justify-content:center;gap:4px}.nav-item{position:relative}.nav-link{display:block;padding:25px 13px;font-size:15px;font-weight:600;white-space:nowrap}.nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--blue)}.has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8792a5}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 14px 14px;opacity:0;visibility:hidden;pointer-events:none;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;pointer-events:auto}.dropdown-panel{width:280px;padding:14px}.dropdown-panel a{display:block;padding:9px 12px;border-radius:8px;font-size:14px}.dropdown-panel a:hover{background:#eef4ff;color:var(--blue)}.dropdown-footer,.mega-footer{border-top:1px solid var(--line);margin-top:10px;padding-top:12px;color:var(--blue)!important;font-weight:700}
    .mega-menu{width:760px;padding:22px}.mega-title-row{display:flex;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:15px}.mega-title-row strong{font-size:17px}.mega-title-row span{color:var(--muted);font-size:13px}.mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.mega-card{border:1px solid var(--line);border-radius:10px;padding:12px;background:#fff;transition:.2s}.mega-card:hover{border-color:#9eb8e8;transform:translateY(-2px)}.mega-card-head{display:flex;align-items:center;gap:9px}.mega-card-head img{width:32px;height:32px;object-fit:contain}.mega-card strong{font-size:14px}.mega-card p{font-size:12px;color:var(--muted);margin:7px 0 0}.rating{display:block;font-size:11px;color:#d38515}.mega-meta{display:flex;gap:8px;color:var(--muted);font-size:11px;margin-top:8px;flex-wrap:wrap}.video-card>img,.product-card>img{width:100%;height:80px;object-fit:cover;border-radius:7px;margin-bottom:8px}.category-links{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.category-links a{background:#f0f4fa;border-radius:20px;padding:4px 10px;font-size:12px}.header-btns{display:flex;align-items:center;gap:12px}.member-entry{font-size:14px;color:var(--blue);font-weight:700}.account-entry{background:var(--blue);color:#fff;border-radius:7px;padding:8px 16px;font-size:14px;font-weight:700}.hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}.hamburger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
    .mobile-drawer{position:fixed;right:-390px;top:0;width:min(360px,90vw);height:100vh;background:#fff;z-index:60;box-shadow:-10px 0 35px rgba(0,0,0,.18);transition:.3s;overflow:auto}.mobile-drawer.open{right:0}.drawer-overlay{position:fixed;inset:0;background:rgba(8,20,39,.5);z-index:50;opacity:0;visibility:hidden;transition:.3s}.drawer-overlay.open{opacity:1;visibility:visible}.drawer-head{height:72px;padding:0 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:16px;font-weight:700}.drawer-head>a{margin-left:auto;color:var(--blue)}.drawer-close{border:0;background:none;font-size:30px;color:var(--muted);cursor:pointer}.drawer-menu{padding:12px 20px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;text-align:left;border:0;border-bottom:1px solid var(--line);background:none;font-weight:600;color:var(--ink);cursor:pointer}.drawer-toggle:after{content:"＋";float:right;color:var(--muted)}.drawer-toggle.active:after{content:"−"}.drawer-submenu{max-height:0;overflow:hidden;transition:.25s;padding-left:14px}.drawer-submenu.open{max-height:600px;padding-bottom:8px}.drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .product-page{padding:42px 0 72px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}.breadcrumb a{color:var(--blue)}.product-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:42px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow)}.product-image{min-height:350px;border-radius:16px;background:linear-gradient(145deg,#eef4ff,#d9e5f7);display:flex;align-items:center;justify-content:center;overflow:hidden}.product-image img{width:100%;height:350px;object-fit:contain}.product-copy .eyebrow{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}.product-copy h1{font-size:clamp(28px,4vw,46px);line-height:1.2;margin:12px 0 14px}.product-summary{color:var(--muted);font-size:16px;margin:0 0 22px}.product-meta{display:flex;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;margin-bottom:23px;color:var(--muted);font-size:13px}.product-meta b{display:block;color:var(--ink);font-size:18px}.product-actions{display:flex;gap:12px;flex-wrap:wrap}.primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:11px 20px;font-weight:700}.primary-btn{background:var(--blue);color:#fff}.secondary-btn{border:1px solid #b7c7df;color:var(--blue);background:#fff}.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:28px}.section-title{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:13px;margin:0 0 22px}.section-title h2{font-size:22px;margin:0}.product-body{min-width:0;max-width:100%;overflow-x:auto;color:#39465a}.product-body img{max-width:100%;height:auto}.product-body table{max-width:100%;display:block;overflow-x:auto;border-collapse:collapse}.product-body p{margin:0 0 17px}.product-body h2,.product-body h3{color:var(--ink);margin-top:26px}.product-body blockquote{border-left:4px solid var(--blue);background:#f2f6fc;margin:20px 0;padding:14px 18px}.related-card{height:max-content}.related-card h2{font-size:19px;margin:0 0 15px}.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;font-size:14px}.related-item p{color:var(--muted);font-size:12px;margin:4px 0 0}.related-item time{font-size:11px;color:#8b96a8}
    .footer{background:#101d32;color:#dbe5f4;padding:50px 0 18px}.footer .logo{color:#fff}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px}.footer h3{color:#fff;font-size:15px;margin:0 0 15px}.footer-brand p{color:#9eacc0;font-size:13px;max-width:290px}.footer-links{display:grid;gap:8px}.footer-links a,.footer-contact a,.footer-contact div{color:#aebbd0;font-size:13px}.footer-links a:hover,.footer-contact a:hover{color:#fff}.footer-contact{display:grid;gap:9px}.social-entry{color:#8eb2ed!important}.footer-bottom{border-top:1px solid #2c3a50;margin-top:35px;padding-top:17px;display:flex;justify-content:space-between;gap:20px;color:#91a0b5;font-size:12px}.risk-note{max-width:610px;text-align:right}
    @media(max-width:1050px){.main-nav{display:none}.hamburger{display:block}.header-btns{margin-left:auto}.mega-menu{display:none}.footer-grid{grid-template-columns:repeat(2,1fr)}.product-hero{grid-template-columns:1fr}.product-layout{grid-template-columns:1fr}}
    @media(max-width:600px){.container{width:min(100% - 28px,1180px)}.topbar-inner{height:auto;min-height:38px;gap:5px;align-items:flex-start;flex-direction:column;padding:7px 0}.topbar-contact{gap:12px;flex-wrap:wrap}.header-inner{height:68px;gap:10px}.member-entry{display:none}.account-entry{padding:7px 11px;font-size:13px}.product-page{padding-top:25px}.product-hero{padding:18px;border-radius:16px;gap:22px}.product-image,.product-image img{height:250px;min-height:250px}.product-copy h1{font-size:30px}.product-layout{margin-top:20px}.content-card,.related-card{padding:20px}.footer-grid{grid-template-columns:1fr;gap:25px}.footer-bottom{display:block}.risk-note{text-align:left;margin-top:10px}.mega-grid{grid-template-columns:1fr}}