:root{
      --theme:#0B3D91;
      --theme-dark:#082d6b;
      --ink:#172238;
      --muted:#69758a;
      --line:#e4e9f1;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 16px 45px rgba(22,46,87,.10);
      --radius:16px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.65}
    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:#10284e;color:#d9e5f5;font-size:13px}
    .topbar-inner{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar-contact{display:flex;gap:12px;align-items:center}
    .topbar a:hover{color:#fff}
    .header{height:78px;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;color:var(--theme);font-size:19px;font-weight:800;white-space:nowrap}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:4px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:6px;height:78px;padding:0 14px;font-size:15px;font-weight:600;color:#29364d}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg);margin-top:-4px}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%) translateY(8px);width:330px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:700px}
    .nav-item:hover>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.dropdown-panel,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-title,.mega-title{font-weight:800;color:var(--theme);margin:0 0 14px;font-size:15px}
    .dropdown-articles{display:grid;gap:10px}
    .dropdown-articles a,.mega-categories a{display:block;font-size:14px;color:#46536a;padding:5px 0}
    .dropdown-articles a:hover,.mega-categories a:hover{color:var(--theme)}
    .dropdown-more,.mega-footer{display:inline-block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);width:100%;color:var(--theme);font-size:13px;font-weight:700}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .mega-card{border:1px solid var(--line);border-radius:10px;padding:11px;background:#fff;transition:.2s}
    .mega-card:hover{border-color:#a9bfdf;transform:translateY(-2px)}
    .mega-card-logo{display:flex;align-items:center;gap:8px;min-height:28px}
    .mega-card-logo strong,.mega-video-title,.mega-product-title{font-size:13px}
    .mega-card-meta{display:flex;flex-wrap:wrap;gap:4px 10px;color:var(--muted);font-size:11px;margin-top:8px}
    .mega-card p{font-size:12px;color:var(--muted);margin:7px 0 0;line-height:1.45}
    .mega-card-logo img{width:26px;height:26px;object-fit:contain}
    .mega-tool-icon{width:28px!important;height:28px!important}
    .mega-video-cover,.mega-product-cover{width:100%;height:62px;object-fit:cover;border-radius:6px;margin-bottom:7px}
    .mega-layout{display:grid;grid-template-columns:145px 1fr;gap:20px}
    .mega-videos{width:850px}
    .mega-products{width:850px}
    .header-btns{display:flex;align-items:center;gap:12px}
    .header-member{font-size:13px;color:var(--theme);font-weight:700}
    .header-open{padding:9px 17px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .header-open:hover{background:var(--theme-dark)}
    .hamburger{display:none;border:0;background:transparent;width:38px;height:38px;padding:7px;cursor:pointer}
    .hamburger span{height:2px;background:var(--ink);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{position:fixed;inset:0;background:rgba(10,25,49,.46);z-index:50;opacity:0;visibility:hidden;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(370px,88vw);background:#fff;z-index:60;transform:translateX(100%);transition:.28s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:16px;padding:21px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;color:var(--theme)}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer;color:var(--muted)}
    .drawer-menu{padding:10px 21px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:var(--ink);font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{max-height:0;overflow:hidden;transition:.25s;padding-left:13px}
    .drawer-submenu.open{max-height:500px;padding-top:6px;padding-bottom:6px}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{background:#101e35;color:#bfccdf;margin-top:80px}
    .footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:46px;padding:54px 0 42px}
    .footer .logo{color:#fff;margin-bottom:17px}
    .footer p{font-size:13px;line-height:1.8;margin:0;color:#9eabc0}
    .footer h3{font-size:15px;color:#fff;margin:5px 0 17px}
    .footer-links,.footer-contact{display:grid;gap:10px;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-social{margin-top:18px;font-size:13px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:20px;padding:18px 0;font-size:12px;color:#91a0b6}
    .footer-bottom-links{display:flex;gap:18px}
    .tools-page{background:linear-gradient(180deg,#f7f9fc 0,#fff 430px);padding-bottom:20px}
    .tools-heading{text-align:center;padding:75px 0 44px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.12em}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--theme)}
    .tools-heading h1{font-size:clamp(32px,5vw,52px);line-height:1.2;margin:15px 0 14px;letter-spacing:-.04em;color:#122544}
    .tools-heading p{max-width:650px;margin:0 auto;color:var(--muted);font-size:16px}
    .tools-toolbar{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:24px}
    .tools-toolbar h2{font-size:22px;margin:0;color:#172b4b}
    .tools-note{color:var(--muted);font-size:13px}
    .tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .tool-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-height:245px;display:flex;flex-direction:column;box-shadow:0 7px 22px rgba(24,53,94,.04);transition:.25s}
    .tool-card:hover{transform:translateY(-5px);border-color:#adc2e2;box-shadow:var(--shadow)}
    .tool-card-head{display:flex;align-items:center;gap:15px;margin-bottom:17px}
    .tool-icon{width:54px;height:54px;object-fit:contain;border-radius:13px;background:#eef4ff;padding:9px}
    .tool-card h3{font-size:18px;margin:0;color:#17345f}
    .tool-card p{color:var(--muted);font-size:14px;line-height:1.75;margin:0 0 20px;flex:1}
    .tool-link{display:flex;align-items:center;justify-content:space-between;color:var(--theme);font-size:13px;font-weight:800;border-top:1px solid var(--line);padding-top:14px}
    .tool-link span{font-size:18px}
    .tools-bottom{margin-top:36px;padding:22px 26px;border-radius:14px;background:#eef4fd;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .tools-bottom strong{font-size:16px;color:#17345f}
    .tools-bottom span{font-size:13px;color:var(--muted)}
    .tools-bottom a{background:var(--theme);color:#fff;padding:10px 17px;border-radius:8px;font-size:13px;font-weight:700;white-space:nowrap}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .tools-grid{grid-template-columns:repeat(2,1fr)}
      .footer-main{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{height:auto;min-height:38px;padding:8px 0;align-items:flex-start;gap:8px;flex-direction:column}
      .topbar-contact{gap:7px;flex-wrap:wrap}
      .header,.header-inner{height:68px}
      .header-member{display:none}
      .header-open{padding:8px 12px}
      .tools-heading{padding:54px 0 32px}
      .tools-heading h1{font-size:34px}
      .tools-heading p{font-size:14px}
      .tools-toolbar{align-items:flex-start;flex-direction:column;gap:5px}
      .tools-grid{grid-template-columns:1fr;gap:14px}
      .tool-card{min-height:220px;padding:20px}
      .tools-bottom{align-items:flex-start;flex-direction:column;padding:20px}
      .footer-main{grid-template-columns:1fr;gap:30px;padding:40px 0 30px}
      .footer-bottom{align-items:flex-start;flex-direction:column}
    }