:root{
      --theme:#0B3D91;
      --theme-dark:#082b67;
      --ink:#172033;
      --muted:#6d7789;
      --line:#e4e8ef;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 16px 44px rgba(21,43,82,.09);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;background:#fff;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:#f3f6fa;border-bottom:1px solid #e9edf3;color:#687386;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:var(--theme)}
    .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(--theme);font-size:19px}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:3px;padding:0;margin:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:6px;padding:27px 13px;color:#3a4659;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-link.active{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px 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;transition:.2s ease;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 14px 14px;padding:18px;min-width:230px}
    .mega-menu{width:430px}
    .mega-menu-wide{width:760px}
    .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;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .dropdown-panel a{display:block;padding:9px 10px;border-radius:8px;font-size:14px}
    .dropdown-panel a:hover,.mega-category-list a:hover{background:var(--soft);color:var(--theme)}
    .mega-head{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:0 2px 14px;border-bottom:1px solid var(--line)}
    .mega-head strong{font-size:16px;color:var(--ink)}
    .mega-head span{font-size:12px;color:var(--muted)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:14px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #edf0f5;border-radius:10px;min-width:0}
    .mega-card:hover{border-color:#b9c9e8;background:#f9fbff}
    .mega-card>img{width:38px;height:38px;object-fit:contain;border-radius:8px;background:#f3f6fa;flex:none}
    .mega-card-body{min-width:0;display:flex;flex-direction:column}
    .mega-card-body strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card-body p{font-size:11px;line-height:1.45;color:var(--muted);margin:3px 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .mega-card-body small{font-size:11px;color:var(--muted);line-height:1.5}
    .mega-category-list{display:flex;flex-wrap:wrap;gap:7px;margin:13px 0 3px}
    .mega-category-list a{padding:4px 9px;color:var(--muted);font-size:12px;border-radius:20px}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;text-align:right}
    .header-btns{display:flex;align-items:center;gap:13px}
    .member-entry{font-size:13px;color:var(--theme);font-weight:700;white-space:nowrap}
    .account-entry{background:var(--theme);color:#fff;border-radius:8px;padding:8px 15px;font-size:13px}
    .account-entry:hover{background:var(--theme-dark)}
    .hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:23px;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(7,22,48,.42);opacity:0;visibility:hidden;transition:.2s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(370px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.28s ease;z-index:50;overflow:auto;box-shadow:-15px 0 40px rgba(0,0,0,.12)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:68px;padding:0 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:15px;color:var(--theme);font-weight:700}
    .drawer-head>a{margin-left:auto;background:var(--theme);color:#fff;border-radius:7px;padding:6px 12px;font-size:13px}
    .drawer-close{border:0;background:none;font-size:29px;color:#697386;cursor:pointer;line-height:1}
    .drawer-menu{padding:12px 20px 35px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 2px;border:0;border-bottom:1px solid #edf0f4;background:none;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{display:none;padding:5px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:80px;background:#101b2e;color:#aeb9ca}
    .footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:45px;padding:54px 0 42px}
    .footer .logo{color:#fff}
    .footer-brand p{max-width:330px;color:#9daabd;font-size:13px;margin:18px 0}
    .footer-social{color:#dce5f3;font-size:13px}
    .footer-column h3{font-size:15px;color:#fff;margin:2px 0 15px}
    .footer-links{display:grid;gap:9px;font-size:13px}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-contact{display:grid;gap:14px;font-size:13px}
    .footer-contact span{color:#8291a9}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#8291a9}
    .tools-page{background:#f6f8fb;padding-bottom:5px}
    .tools-hero{padding:72px 0 58px;background:linear-gradient(135deg,#f7faff 0%,#eef3fb 58%,#e8eef8 100%);border-bottom:1px solid #e3eaf4}
    .tools-hero-inner{text-align:center;max-width:760px;margin:auto}
    .eyebrow{display:inline-flex;padding:5px 13px;border-radius:30px;background:#dce8fb;color:var(--theme);font-size:12px;font-weight:700;letter-spacing:.08em}
    .tools-hero h1{font-size:clamp(32px,5vw,54px);line-height:1.18;margin:17px 0 14px;color:#132b54}
    .tools-hero p{margin:0 auto;color:var(--muted);font-size:16px;max-width:650px}
    .tool-filter{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin-top:27px}
    .tool-filter a{padding:8px 16px;border:1px solid #cedaeb;border-radius:30px;color:#50617b;background:rgba(255,255,255,.7);font-size:13px}
    .tool-filter a:first-child,.tool-filter a:hover{background:var(--theme);border-color:var(--theme);color:#fff}
    .tools-content{padding:52px 0}
    .section-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:22px}
    .section-heading h2{margin:0;color:#182842;font-size:27px}
    .section-heading p{margin:0;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 #e4e9f1;border-radius:var(--radius);padding:24px;box-shadow:0 8px 25px rgba(27,52,93,.04);display:flex;flex-direction:column;min-height:245px;transition:.22s}
    .tool-card:hover{transform:translateY(-5px);border-color:#b6c8e5;box-shadow:var(--shadow)}
    .tool-icon{height:52px;width:52px;border-radius:14px;object-fit:contain;background:#edf3fc;padding:10px;margin-bottom:18px}
    .tool-card h3{font-size:18px;margin:0 0 9px;color:#1a2b48}
    .tool-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .tool-card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:19px;border-top:1px solid #edf0f4}
    .tool-card-footer span{font-size:12px;color:#98a2b2}
    .tool-card-footer a{font-size:13px;color:var(--theme);font-weight:700}
    .tools-note{margin-top:45px;background:#fff;border:1px solid #e4e9f1;border-radius:var(--radius);padding:27px 30px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .tools-note h2{font-size:19px;margin:0 0 5px}
    .tools-note p{margin:0;color:var(--muted);font-size:13px}
    .tools-note a{flex:none;color:#fff;background:var(--theme);padding:10px 18px;border-radius:8px;font-size:13px}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .tools-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{height:auto;min-height:38px;padding:8px 0;align-items:flex-start;gap:8px}
      .topbar-contact{gap:8px;flex-direction:column;text-align:right}
      .member-entry{display:none}
      .header-inner{height:67px;gap:10px}
      .logo{font-size:16px}
      .logo img{width:30px;height:30px}
      .tools-hero{padding:52px 0 43px}
      .tools-hero p{font-size:14px}
      .tools-content{padding:38px 0}
      .section-heading{display:block}
      .section-heading h2{font-size:23px;margin-bottom:5px}
      .tools-grid{grid-template-columns:1fr;gap:14px}
      .tool-card{min-height:220px}
      .tools-note{display:block;padding:22px}
      .tools-note a{display:inline-block;margin-top:18px}
      .footer{margin-top:45px}
      .footer-main{grid-template-columns:1fr 1fr;gap:30px 20px;padding:38px 0 30px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block;line-height:2}
      .footer-bottom span{display:block}
    }