:root{
      --theme:#0B3D91;
      --theme-dark:#082b68;
      --ink:#142033;
      --muted:#65738a;
      --line:#e5eaf1;
      --soft:#f5f8fc;
      --white:#fff;
      --accent:#ec4f91;
      --shadow:0 18px 50px rgba(16,42,78,.1);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;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(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{background:#101a2b;color:#cbd6e8;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{display:flex;gap:20px}
    .topbar a:hover{color:#fff}

    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .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;color:var(--ink)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .logo span{font-size:19px;letter-spacing:.02em}
    .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:7px;height:78px;padding:0 13px;font-size:14px;font-weight:600;color:#3b4a61}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .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);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 16px 16px}
    .dropdown-panel{width:280px;padding:12px}
    .dropdown-panel a{display:block;padding:10px 12px;border-radius:8px;font-size:13px}
    .dropdown-panel a:hover{background:var(--soft);color:var(--theme)}
    .dropdown-panel .dropdown-all{margin-top:6px;background:var(--theme);color:#fff;text-align:center}
    .mega-menu{width:min(1000px,calc(100vw - 30px));padding:22px}
    .mega-host:hover>.mega-menu,.mega-host:focus-within>.mega-menu,
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
    .mega-title{margin:0 0 13px;color:var(--theme);font-size:13px;font-weight:800}
    .mega-grid{display:grid;gap:10px}
    .mega-grid-6{grid-template-columns:repeat(3,1fr)}
    .mega-grid-3{grid-template-columns:repeat(3,1fr)}
    .mega-card{display:flex;gap:10px;min-width:0;padding:11px;border:1px solid var(--line);border-radius:12px;background:#fff}
    .mega-card:hover{border-color:#9eb5db;background:#f8fbff}
    .mega-card>img{width:42px;height:42px;object-fit:cover;border-radius:8px;flex:0 0 auto}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:13px}
    .mega-card small{font-size:11px;color:var(--muted);line-height:1.5}
    .mega-split{display:grid;grid-template-columns:180px 1fr;gap:25px}
    .mega-categories{display:grid;gap:5px}
    .mega-categories a{padding:7px 9px;background:var(--soft);border-radius:7px;font-size:12px}
    .mega-categories a:hover{color:var(--theme);background:#eaf1fc}
    .mega-footer{display:block;margin-top:17px;padding-top:13px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}

    .header-btns{display:flex;align-items:center;gap:12px}
    .header-account{font-size:13px;color:var(--theme);font-weight:700}
    .header-open{padding:8px 15px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .header-open:hover{background:var(--theme-dark)}
    .hamburger{display:none;width:42px;height:42px;padding:9px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:5px 0;background:var(--ink);transition:.2s}
    .hamburger.active span:first-child{transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-7px) rotate(-45deg)}

    .drawer-overlay{position:fixed;inset:0;z-index:40;background:rgba(8,18,35,.55);opacity:0;visibility:hidden;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;z-index:41;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.3s ease;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:15px;padding:20px;border-bottom:1px solid var(--line);font-weight:800}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:30px;line-height:1;cursor:pointer;color:var(--muted)}
    .drawer-menu{padding:12px 20px 35px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}

    .product-page{padding:46px 0 80px;background:linear-gradient(180deg,#f7faff 0,#fff 420px)}
    .breadcrumb{display:flex;gap:8px;align-items:center;margin-bottom:24px;color:var(--muted);font-size:13px}
    .breadcrumb a:hover{color:var(--theme)}
    .product-hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:48px;align-items:center;padding:36px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
    .product-category{display:inline-flex;padding:5px 12px;border-radius:30px;background:#eaf1fc;color:var(--theme);font-size:12px;font-weight:800}
    .product-hero h1{margin:15px 0 12px;font-size:clamp(30px,4vw,52px);line-height:1.18;letter-spacing:-.03em}
    .product-summary{margin:0 0 23px;color:var(--muted);font-size:16px}
    .product-meta{display:flex;flex-wrap:wrap;gap:12px 22px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
    .product-meta strong{color:var(--ink)}
    .product-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:25px}
    .button{display:inline-flex;justify-content:center;align-items:center;min-height:44px;padding:0 20px;border-radius:9px;background:var(--theme);color:#fff;font-weight:700;font-size:14px}
    .button:hover{background:var(--theme-dark)}
    .button.secondary{background:#edf3fb;color:var(--theme)}
    .product-cover{min-height:310px;display:flex;align-items:center;justify-content:center;padding:24px;border-radius:20px;background:radial-gradient(circle at 30% 20%,#5d8dda,#0b3d91 54%,#081d43);overflow:hidden}
    .product-cover img{width:100%;max-height:330px;object-fit:contain;filter:drop-shadow(0 15px 20px rgba(0,0,0,.25))}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:30px;margin-top:34px}
    .content-card,.related-card{border:1px solid var(--line);border-radius:18px;background:#fff}
    .content-card{padding:32px}
    .section-heading{margin:0 0 20px;font-size:22px}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#394960}
    .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 18px}
    .product-body h2,.product-body h3{color:var(--ink);margin:28px 0 12px}
    .sidebar-title{margin:0;padding:20px 20px 15px;font-size:18px;border-bottom:1px solid var(--line)}
    .related-list{padding:10px}
    .related-item{display:flex;gap:11px;padding:12px 10px;border-bottom:1px solid var(--line)}
    .related-item:last-child{border-bottom:0}
    .related-item img{width:64px;height:58px;object-fit:cover;border-radius:8px;background:var(--soft)}
    .related-item strong{display:block;font-size:13px;line-height:1.5}
    .related-item small{display:block;color:var(--muted);font-size:11px;margin-top:4px}
    .related-item:hover strong{color:var(--theme)}
    .product-note{margin-top:30px;padding:18px 20px;border-left:4px solid var(--accent);background:#fff4f8;color:#6d4054;font-size:13px}

    .footer{background:#101a2b;color:#b7c4d8;padding:55px 0 20px}
    .footer-main{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:35px}
    .footer .logo{color:#fff;margin-bottom:15px}
    .footer-brand p{max-width:360px;margin:0 0 15px;font-size:13px}
    .footer-search{color:#91b9ff;font-size:12px}
    .footer h3{margin:3px 0 14px;color:#fff;font-size: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-contact strong{color:#fff}
    .footer-social{line-height:1.7}
    .footer-bottom{display:flex;justify-content:space-between;gap:25px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px}
    .risk-note{max-width:620px;color:#91a1b8}

    @media (max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{justify-content:space-between}
      .header-btns{margin-left:auto}
      .mega-menu{display:none}
      .product-hero{grid-template-columns:1fr;gap:28px}
      .product-cover{min-height:250px}
    }
    @media (max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:3px}
      .topbar-contact{gap:12px;flex-wrap:wrap}
      .header-inner{height:68px;gap:10px}
      .header-account{display:none}
      .logo span{font-size:16px}
      .product-page{padding:28px 0 55px}
      .product-hero{padding:22px;border-radius:17px}
      .product-hero h1{font-size:31px}
      .product-summary{font-size:14px}
      .product-cover{min-height:210px;padding:18px}
      .product-layout{grid-template-columns:1fr;gap:20px}
      .content-card{padding:22px}
      .footer{padding-top:38px}
      .footer-main{grid-template-columns:1fr 1fr;gap:28px 18px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .risk-note{margin-top:12px}
    }
    @media (max-width:460px){
      .footer-main{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
      .header-open{padding:7px 10px;font-size:12px}
    }