:root{
      --theme:#0B3D91;
      --theme-source:{主题色};
      --theme-dark:#06285f;
      --theme-soft:#eaf1fc;
      --ink:#132238;
      --muted:#637083;
      --line:#dce3ed;
      --surface:#ffffff;
      --surface-soft:#f5f7fa;
      --success:#147a4b;
      --shadow:0 16px 42px rgba(13,38,76,.12);
      --radius:18px;
    }

    *{box-sizing:border-box}
    html{scroll-behaviour:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--surface-soft);
      font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      line-height:1.65;
      -webkit-font-smoothing:antialiased;
    }
    body.drawer-locked{overflow:hidden}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dce8fb;
      background:var(--theme-dark);
      font-size:.84rem;
    }
    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar-links{display:flex;align-items:center;gap:20px}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:40;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 4px 18px rgba(13,38,76,.05);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:26px;
    }
    .logo{
      min-width:0;
      display:inline-flex;
      align-items:center;
      gap:10px;
      color:var(--theme-dark);
      font-weight:800;
      letter-spacing:-.02em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .logo span{
      max-width:180px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .main-nav{margin-left:auto;align-self:stretch}
    .nav-list{
      height:100%;
      margin:0;
      padding:0;
      display:flex;
      align-items:stretch;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }
    .nav-link{
      height:100%;
      padding:0 12px;
      display:flex;
      align-items:center;
      color:#28374b;
      font-size:.92rem;
      font-weight:650;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link{
      color:var(--theme);
      background:var(--theme-soft);
    }
    .has-panel>.nav-link::after{
      content:"";
      width:6px;
      height:6px;
      margin-left:7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg) translateY(-2px);
    }
    .has-panel::after{
      content:"";
      position:absolute;
      top:100%;
      left:0;
      width:100%;
      height:12px;
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      z-index:60;
      visibility:hidden;
      opacity:0;
      pointer-events:none;
      transform:translateY(10px);
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
    }
    .nav-item:hover>.dropdown-panel,
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.dropdown-panel,
    .nav-item:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      pointer-events:auto;
      transform:translateY(0);
    }
    .dropdown-panel{
      left:0;
      width:330px;
      padding:20px;
      border-radius:0 0 16px 16px;
    }
    .dropdown-title,
    .mega-title{
      margin:0;
      color:var(--theme-dark);
      font-weight:800;
    }
    .dropdown-list{
      display:grid;
      gap:7px;
      margin:14px 0;
    }
    .dropdown-list a{
      padding:9px 10px;
      color:#415067;
      border-radius:8px;
    }
    .dropdown-list a:hover{color:var(--theme);background:var(--theme-soft)}
    .dropdown-footer{
      padding-top:13px;
      display:flex;
      justify-content:space-between;
      gap:12px;
      border-top:1px solid var(--line);
      color:var(--muted);
      font-size:.86rem;
    }
    .dropdown-footer a,.text-link{color:var(--theme);font-weight:750}
    .mega-menu{
      left:50%;
      width:min(1120px,calc(100vw - 40px));
      padding:24px;
      border-radius:0 0 20px 20px;
      transform:translate(-50%,10px);
    }
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{transform:translate(-50%,0)}
    .mega-top{
      padding-bottom:16px;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:24px;
      border-bottom:1px solid var(--line);
    }
    .mega-top p:not(.mega-title){
      margin:4px 0 0;
      color:var(--muted);
      font-size:.9rem;
    }
    .mega-categories{
      padding:16px 0 4px;
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .mega-categories a{
      padding:7px 12px;
      color:var(--theme);
      background:var(--theme-soft);
      border-radius:999px;
      font-size:.82rem;
      font-weight:700;
    }
    .mega-grid{
      padding-top:17px;
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }
    .mega-card{
      min-width:0;
      padding:13px;
      display:grid;
      grid-template-columns:48px minmax(0,1fr);
      align-items:center;
      gap:5px 12px;
      border:1px solid var(--line);
      border-radius:12px;
      transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
    }
    .mega-card:hover{
      transform:translateY(-2px);
      border-color:#a8bee2;
      box-shadow:0 9px 20px rgba(11,61,145,.09);
    }
    .mega-card img{
      grid-row:1 / span 3;
      width:48px;
      height:48px;
      object-fit:contain;
      border-radius:9px;
      background:#f4f6f9;
    }
    .mega-card strong{
      min-width:0;
      overflow:hidden;
      color:#1c2c43;
      text-overflow:ellipsis;
      white-space:nowrap;
      font-size:.9rem;
    }
    .mega-card p{
      margin:0;
      display:-webkit-box;
      overflow:hidden;
      color:var(--muted);
      font-size:.78rem;
      line-height:1.4;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .mega-meta{
      grid-column:2;
      display:flex;
      flex-wrap:wrap;
      gap:4px 10px;
      color:var(--muted);
      font-size:.72rem;
    }
    .video-card,.product-card{align-items:start}
    .video-card img,.product-card img{object-fit:cover}
    .tool-icon{object-fit:contain!important}

    .header-btns{
      display:flex;
      align-items:center;
      gap:10px;
      white-space:nowrap;
    }
    .btn{
      min-height:42px;
      padding:10px 17px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border:1px solid transparent;
      border-radius:10px;
      font-weight:750;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .btn:hover{transform:translateY(-1px)}
    .btn-primary{
      color:#fff;
      background:var(--theme);
      box-shadow:0 8px 18px rgba(11,61,145,.2);
    }
    .btn-primary:hover{background:var(--theme-dark)}
    .btn-secondary{
      color:var(--theme);
      background:#fff;
      border-color:#b9c9e2;
    }
    .hamburger{
      width:44px;
      height:42px;
      padding:10px;
      display:none;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:5px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:10px;
    }
    .hamburger span{
      width:21px;
      height:2px;
      background:var(--theme-dark);
      transition:transform .2s ease,opacity .2s ease;
    }
    .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{
      position:fixed;
      inset:0;
      z-index:80;
      visibility:hidden;
      opacity:0;
      background:rgba(5,17,37,.56);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      z-index:90;
      width:min(420px,92vw);
      height:100dvh;
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 50px rgba(4,20,49,.22);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:78px;
      padding:14px 18px;
      display:flex;
      align-items:center;
      gap:12px;
      color:var(--theme-dark);
      border-bottom:1px solid var(--line);
    }
    .drawer-head>a{font-weight:750}
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      color:var(--theme-dark);
      background:var(--theme-soft);
      border:0;
      border-radius:50%;
      font-size:1.55rem;
      line-height:1;
    }
    .drawer-menu{padding:14px 18px 30px}
    .drawer-link,
    .drawer-toggle{
      width:100%;
      min-height:49px;
      padding:12px 4px;
      display:flex;
      align-items:center;
      color:#1d2b40;
      background:none;
      border:0;
      border-bottom:1px solid var(--line);
      font-weight:750;
      text-align:left;
    }
    .drawer-toggle::after{
      content:"+";
      margin-left:auto;
      color:var(--theme);
      font-size:1.2rem;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      opacity:0;
      transition:max-height .3s ease,opacity .25s ease,padding .25s ease;
    }
    .drawer-submenu.open{
      max-height:650px;
      padding:7px 0 10px 14px;
      opacity:1;
    }
    .drawer-submenu a{
      padding:9px 10px;
      display:block;
      color:var(--muted);
      border-left:2px solid #d6e1f3;
      font-size:.9rem;
    }
    .drawer-submenu a:hover{color:var(--theme);background:var(--theme-soft)}

    .ea-content-stack{
      min-width:0;
      padding-bottom:72px;
    }
    .ea-content-stack .product-masthead{
      position:relative;
      overflow:hidden;
      padding:58px 0 48px;
      color:#fff;
      background:
        radial-gradient(circle at 84% 18%,rgba(116,166,244,.32),transparent 30%),
        linear-gradient(135deg,var(--theme-dark),var(--theme) 62%,#1d61b8);
    }
    .ea-content-stack .product-masthead::after{
      content:"";
      position:absolute;
      right:-80px;
      bottom:-150px;
      width:360px;
      height:360px;
      border:65px solid rgba(255,255,255,.06);
      border-radius:50%;
    }
    .ea-content-stack .breadcrumbs{
      position:relative;
      z-index:1;
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      color:#d7e6fc;
      font-size:.88rem;
    }
    .ea-content-stack .breadcrumbs a:hover{color:#fff}
    .ea-content-stack .product-kicker{
      margin:25px 0 9px;
      color:#bcd4fa;
      font-size:.82rem;
      font-weight:800;
      letter-spacing:.12em;
      text-transform:uppercase;
    }
    .ea-content-stack .product-masthead h1{
      position:relative;
      z-index:1;
      max-width:880px;
      margin:0;
      font-size:clamp(2rem,5vw,4rem);
      line-height:1.08;
      letter-spacing:-.045em;
    }
    .ea-content-stack .product-lead{
      position:relative;
      z-index:1;
      max-width:820px;
      margin:18px 0 0;
      color:#e4edfb;
      font-size:1.08rem;
    }
    .ea-content-stack .product-meta{
      position:relative;
      z-index:1;
      margin-top:25px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .ea-content-stack .product-meta span{
      padding:7px 12px;
      color:#eef5ff;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.18);
      border-radius:999px;
      font-size:.84rem;
    }
    .ea-content-stack .product-overview{
      position:relative;
      z-index:2;
      margin-top:-1px;
      padding:34px 0 0;
    }
    .ea-content-stack .overview-card{
      min-width:0;
      padding:26px;
      display:grid;
      grid-template-columns:minmax(220px,360px) minmax(0,1fr);
      gap:34px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .ea-content-stack .product-image-wrap{
      min-width:0;
      min-height:280px;
      padding:20px;
      display:flex;
      align-items:center;
      justify-content:center;
      background:linear-gradient(145deg,#edf3fc,#fff);
      border:1px solid #d8e2f1;
      border-radius:15px;
    }
    .ea-content-stack .product-image-wrap img{
      width:100%;
      max-height:330px;
      object-fit:contain;
      border-radius:10px;
    }
    .ea-content-stack .overview-copy{min-width:0}
    .ea-content-stack .eyebrow{
      margin:0 0 6px;
      color:var(--theme);
      font-size:.8rem;
      font-weight:850;
      letter-spacing:.1em;
      text-transform:uppercase;
    }
    .ea-content-stack .overview-copy h2,
    .ea-content-stack .content-panel h2,
    .ea-content-stack .related-products h2{
      margin:0;
      color:#12233c;
      line-height:1.2;
      letter-spacing:-.025em;
    }
    .ea-content-stack .overview-copy h2{font-size:clamp(1.5rem,3vw,2.25rem)}
    .ea-content-stack .summary{
      margin:14px 0 0;
      color:#4e5e73;
      font-size:1.02rem;
    }
    .ea-content-stack .detail-grid{
      margin:22px 0 0;
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:12px;
    }
    .ea-content-stack .detail-item{
      min-width:0;
      padding:13px 15px;
      background:#f7f9fc;
      border:1px solid #e3e8f0;
      border-radius:11px;
    }
    .ea-content-stack .detail-item span{
      display:block;
      color:var(--muted);
      font-size:.76rem;
      font-weight:700;
      text-transform:uppercase;
    }
    .ea-content-stack .detail-item strong{
      display:block;
      margin-top:2px;
      overflow-wrap:anywhere;
      color:#1d304d;
      font-size:.94rem;
    }
    .ea-content-stack .product-actions{
      margin-top:23px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .ea-content-stack .product-layout{
      min-width:0;
      margin-top:28px;
      display:grid;
      grid-template-columns:minmax(0,1fr) 300px;
      align-items:start;
      gap:28px;
    }
    .ea-content-stack .content-panel,
    .ea-content-stack .side-panel{
      min-width:0;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 10px 30px rgba(13,38,76,.07);
    }
    .ea-content-stack .content-panel{padding:clamp(22px,4vw,42px)}
    .ea-content-stack .content-panel h2{margin-bottom:23px;font-size:1.75rem}
    .ea-content-stack .product-body{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      overflow-wrap:anywhere;
      color:#34445a;
    }
    .ea-content-stack .product-body>*:first-child{margin-top:0}
    .ea-content-stack .product-body>*:last-child{margin-bottom:0}
    .ea-content-stack .product-body h1,
    .ea-content-stack .product-body h2,
    .ea-content-stack .product-body h3,
    .ea-content-stack .product-body h4{
      color:#142842;
      line-height:1.28;
    }
    .ea-content-stack .product-body a{
      color:var(--theme);
      text-decoration:underline;
      text-underline-offset:3px;
    }
    .ea-content-stack .product-body img,
    .ea-content-stack .product-body video,
    .ea-content-stack .product-body iframe,
    .ea-content-stack .product-body table{
      max-width:100%;
    }
    .ea-content-stack .product-body img{
      height:auto;
      margin:22px auto;
      border-radius:12px;
    }
    .ea-content-stack .product-body table{
      width:100%;
      border-collapse:collapse;
    }
    .ea-content-stack .product-body th,
    .ea-content-stack .product-body td{
      padding:11px;
      border:1px solid var(--line);
      text-align:left;
    }
    .ea-content-stack .product-body blockquote{
      margin:22px 0;
      padding:17px 20px;
      color:#30445f;
      background:var(--theme-soft);
      border-left:4px solid var(--theme);
      border-radius:0 10px 10px 0;
    }
    .ea-content-stack .side-panel{
      position:sticky;
      top:22px;
      overflow:hidden;
    }
    .ea-content-stack .side-panel h2{
      margin:0;
      padding:19px 20px;
      color:#fff;
      background:var(--theme);
      font-size:1.08rem;
    }
    .ea-content-stack .side-list{padding:8px 20px}
    .ea-content-stack .side-row{
      padding:13px 0;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:15px;
      border-bottom:1px solid var(--line);
      font-size:.87rem;
    }
    .ea-content-stack .side-row:last-child{border-bottom:0}
    .ea-content-stack .side-row span{color:var(--muted)}
    .ea-content-stack .side-row strong{
      max-width:58%;
      color:#20344f;
      text-align:right;
      overflow-wrap:anywhere;
    }
    .ea-content-stack .notice{
      margin:0 20px 20px;
      padding:15px;
      color:#5c4b21;
      background:#fff9e8;
      border:1px solid #eedc9f;
      border-radius:11px;
      font-size:.82rem;
    }
    .ea-content-stack .related-products{
      min-width:0;
      margin-top:46px;
    }
    .ea-content-stack .section-heading{
      margin-bottom:18px;
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
    }
    .ea-content-stack .section-heading p{
      max-width:580px;
      margin:6px 0 0;
      color:var(--muted);
    }
    .ea-content-stack .related-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
    }
    .ea-content-stack .related-card{
      min-width:0;
      overflow:hidden;
      background:#fff;
      border:1px solid var(--line);
      border-radius:15px;
      box-shadow:0 8px 24px rgba(13,38,76,.06);
      transition:transform .2s ease,box-shadow .2s ease;
    }
    .ea-content-stack .related-card:hover{
      transform:translateY(-4px);
      box-shadow:0 15px 34px rgba(13,38,76,.12);
    }
    .ea-content-stack .related-card img{
      width:100%;
      height:180px;
      object-fit:cover;
      background:#edf2f8;
    }
    .ea-content-stack .related-body{padding:18px}
    .ea-content-stack .related-body h3{
      margin:0;
      color:#152a46;
      font-size:1.05rem;
      line-height:1.35;
    }
    .ea-content-stack .related-body p{
      margin:9px 0 13px;
      display:-webkit-box;
      overflow:hidden;
      color:var(--muted);
      font-size:.88rem;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:3;
    }
    .ea-content-stack .related-meta{
      padding-top:12px;
      display:flex;
      justify-content:space-between;
      gap:10px;
      color:#6d798a;
      border-top:1px solid var(--line);
      font-size:.76rem;
    }

    .footer{
      color:#cbd7e8;
      background:#071a36;
    }
    .footer-main{
      padding:56px 0 42px;
      display:grid;
      grid-template-columns:1.5fr repeat(3,1fr);
      gap:38px;
    }
    .footer .logo{color:#fff}
    .footer-brand p{
      max-width:440px;
      margin:15px 0 0;
      color:#aebcd0;
      font-size:.88rem;
    }
    .footer h3{
      margin:5px 0 16px;
      color:#fff;
      font-size:1rem;
    }
    .footer-links,.footer-contact{display:grid;gap:9px}
    .footer-links a,.footer-contact a{color:#b7c5d8;font-size:.9rem}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-social{margin-top:5px}
    .footer-bottom{
      min-height:70px;
      padding:18px 0;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
      color:#90a2bb;
      border-top:1px solid rgba(255,255,255,.1);
      font-size:.82rem;
    }

    @media (max-width:1120px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-btns{margin-left:auto}
      .footer-main{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:860px){
      .ea-content-stack .overview-card{grid-template-columns:1fr}
      .ea-content-stack .product-image-wrap{min-height:220px}
      .ea-content-stack .product-layout{grid-template-columns:1fr}
      .ea-content-stack .side-panel{position:static}
      .ea-content-stack .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{
        min-height:52px;
        align-items:flex-start;
        flex-direction:column;
        justify-content:center;
        gap:1px;
      }
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:68px;gap:10px}
      .header .logo span{max-width:120px}
      .header-btns>.btn{display:none}
      .ea-content-stack .product-masthead{padding:42px 0 38px}
      .ea-content-stack .product-lead{font-size:.98rem}
      .ea-content-stack .overview-card{padding:16px;gap:22px}
      .ea-content-stack .detail-grid{grid-template-columns:1fr}
      .ea-content-stack .content-panel{padding:22px 18px}
      .ea-content-stack .product-actions .btn{width:100%}
      .ea-content-stack .section-heading{align-items:flex-start;flex-direction:column}
      .ea-content-stack .related-grid{grid-template-columns:1fr}
      .ea-content-stack .related-card img{height:200px}
      .footer-main{grid-template-columns:1fr;gap:30px}
      .footer-bottom{align-items:flex-start;flex-direction:column;gap:8px}
    }