:root{
      --primary:#0B3D91;
      --primary-dark:#082d6b;
      --ink:#172033;
      --muted:#64748b;
      --line:#e5eaf1;
      --soft:#f5f8fc;
      --white:#fff;
      --shadow:0 18px 50px rgba(20,45,84,.10);
      --radius:18px;
    }
    *{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:1.7}
    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:#10213d;color:#dbe7f8;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .topbar-links{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:19px;white-space:nowrap;color:var(--primary)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .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;min-height:78px;padding:0 14px;font-size:15px;color:#26344b;white-space:nowrap}
    .nav-link:hover,.nav-link:focus-visible{color:var(--primary)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 4px 8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);width:300px;padding-top:10px;opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}
    .mega-menu{width:min(760px,calc(100vw - 30px))}
    .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-inner,.mega-inner{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
    .dropdown-inner:before,.mega-inner:before{content:"";position:absolute;top:-11px;left:50%;width:20px;height:20px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line);transform:translateX(-50%) rotate(45deg)}
    .dropdown-inner>a:not(.mega-footer),.mega-links a{display:block;padding:8px 4px;border-bottom:1px solid #eef1f5;font-size:14px}
    .dropdown-inner>a:hover,.mega-links a:hover{color:var(--primary)}
    .mega-heading{position:relative;z-index:1;margin:0 0 12px;color:var(--primary);font-size:14px;font-weight:700}
    .mega-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #edf0f5;border-radius:12px;background:#fbfcfe}
    .mega-card:hover{border-color:#b9cbe6;background:#f5f8fd}
    .mega-card img{width:42px;height:42px;object-fit:contain;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}
    .mega-card strong{font-size:13px;white-space:nowrap}
    .mega-card small{color:var(--muted);font-size:11px;line-height:1.45}
    .mega-columns{position:relative;z-index:1;display:grid;grid-template-columns:180px 1fr;gap:20px}
    .mega-footer{position:relative;z-index:1;display:inline-block;margin-top:14px;padding-top:10px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:9px}
    .member-btn,.open-btn{padding:9px 13px;border-radius:9px;font-size:13px;white-space:nowrap}
    .member-btn{color:var(--primary);border:1px solid #cbd8eb}
    .open-btn{background:var(--primary);color:#fff}
    .open-btn:hover{background:var(--primary-dark)}
    .hamburger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:9px;background:#fff;padding:9px;cursor:pointer}
    .hamburger span{display:block;height:2px;background:var(--ink);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(10,22,42,.48);opacity:0;visibility:hidden;z-index:39;transition:.2s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;z-index:40;transform:translateX(105%);transition:.28s ease;overflow:auto;box-shadow:-10px 0 35px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--line)}
    .drawer-head strong{margin-right:auto;color:var(--primary)}
    .drawer-head>a{padding:6px 10px;border-radius:7px;background:var(--primary);color:#fff;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer;color:var(--muted)}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:var(--ink);cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--muted);font-size:18px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 0 8px 16px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#101d33;color:#bdc9db}
    .footer .container{padding:50px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
    .footer .logo{color:#fff;margin-bottom:14px}
    .footer .logo img{background:#fff;border-radius:8px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer p{margin:7px 0;font-size:13px}
    .footer-grid>div:not(.footer-brand)>a{display:block;margin:7px 0;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);margin-top:35px;padding-top:18px;font-size:12px;color:#8fa1bb}
    .tools-page{background:linear-gradient(180deg,#f6f9fd 0,#fff 48%);padding:64px 0 20px}
    .tools-hero{text-align:center;max-width:760px;margin:0 auto 42px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;color:var(--primary);font-size:13px;font-weight:700;letter-spacing:.08em}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--primary)}
    .tools-hero h1{margin:0;color:#12213a;font-size:clamp(30px,5vw,52px);line-height:1.2;letter-spacing:-.04em}
    .tools-hero p{margin:18px auto 0;color:var(--muted);font-size:16px}
    .tool-toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:22px}
    .tool-toolbar h2{margin:0;font-size:22px}
    .tool-note{color:var(--muted);font-size:13px}
    .tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
    .tool-card{display:flex;flex-direction:column;min-height:245px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 9px 25px rgba(25,50,90,.05);transition:.2s}
    .tool-card:hover{transform:translateY(-4px);border-color:#a9bfdf;box-shadow:var(--shadow)}
    .tool-icon{display:flex;align-items:center;justify-content:center;width:58px;height:58px;margin-bottom:18px;border-radius:15px;background:#edf4ff}
    .tool-icon img{width:34px;height:34px;object-fit:contain}
    .tool-card h3{margin:0 0 8px;font-size:18px}
    .tool-card p{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden;margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .tool-card-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:20px}
    .tool-link{color:var(--primary);font-size:14px;font-weight:700}
    .tool-link:after{content:" →";transition:.2s}
    .tool-card:hover .tool-link:after{padding-left:4px}
    .tool-tip{color:#8a98aa;font-size:12px}
    .tools-cta{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:42px;padding:28px 32px;border-radius:var(--radius);background:var(--primary);color:#fff}
    .tools-cta h2{margin:0 0 4px;font-size:21px}
    .tools-cta p{margin:0;color:#dce8fa;font-size:14px}
    .tools-cta a{padding:11px 18px;border-radius:9px;background:#fff;color:var(--primary);font-weight:700;white-space:nowrap}
    @media (max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
      .tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{align-items:flex-start;flex-direction:column;padding:8px 0;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:68px;gap:10px}
      .logo{font-size:16px}
      .logo img{width:32px;height:32px}
      .member-btn,.open-btn{display:none}
      .tools-page{padding-top:42px}
      .tools-hero p{font-size:14px}
      .tool-toolbar{display:block}
      .tool-note{display:block;margin-top:5px}
      .tool-grid{grid-template-columns:1fr;gap:15px}
      .tool-card{min-height:220px;padding:20px}
      .tools-cta{display:block;padding:24px}
      .tools-cta a{display:inline-block;margin-top:18px}
      .footer-grid{grid-template-columns:1fr;gap:24px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:6px}
    }