:root{--theme:#0B3D91;--deep:#07111f;--ink:#142033;--muted:#68758a;--line:#e5eaf1;--bg:#f5f7fb;--green:#66d391}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--bg);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}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#07111f;color:#b9c5d5;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar a{margin-left:18px;color:#dce7f4}
    .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:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--deep);white-space:nowrap}
    .logo img{width:35px;height:35px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;justify-content:center;align-items:stretch;gap:4px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:26px 13px;color:#26354a;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";display:inline-block;width:6px;height:6px;margin:0 0 3px 7px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);width:330px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:0 18px 45px rgba(7,17,31,.14);opacity:0;visibility:hidden;transition:.2s}
    .mega-menu{width:680px}
    .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}
    .drop-title,.mega-title{font-weight:800;color:var(--deep);margin-bottom:12px}
    .drop-list{display:grid;gap:8px}
    .drop-list a{padding:7px 0;color:#526176;border-bottom:1px solid #edf0f5;font-size:13px}
    .drop-list a:hover,.mega-card:hover{color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;min-height:92px;padding:12px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe}
    .mega-card img{width:27px;height:27px;object-fit:contain;margin-bottom:7px}
    .mega-card strong,.mega-card small{display:block}
    .mega-card strong{font-size:13px}
    .mega-card small{color:var(--muted);font-size:11px;line-height:1.5;margin-top:3px}
    .mega-footer{display:block;margin-top:15px;padding-top:13px;border-top:1px solid var(--line);font-size:13px;color:var(--theme);font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-btn{font-size:13px;color:var(--theme)}
    .open-btn{padding:8px 14px;border-radius:7px;background:var(--theme);color:#fff;font-size:13px}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px;background:var(--deep);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.48);z-index:30}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:31;top:0;right:0;width:min(380px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.25s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;justify-content:space-between;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head a{color:var(--theme);margin-left:auto;margin-right:18px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;cursor:pointer;color:#667}
    .drawer-menu{padding:12px 20px 35px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf0f5;background:none;text-align:left;font:inherit;color:var(--ink);cursor:pointer}
    .drawer-group{border-bottom:1px solid #edf0f5}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:2px 0 9px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#07111f;color:#aebbd0}
    .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:35px;padding:48px 0 38px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer p{margin:8px 0;font-size:13px;line-height:1.8}
    .footer-brand strong{color:#fff;font-size:20px}
    .footer-grid>div>a,.footer-grid>div>span{display:block;margin:7px 0;font-size:13px;color:#aebbd0}
    .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);padding:18px 0;font-size:12px;color:#8291a8}
    .tools-page{padding:68px 0 20px}
    .tools-intro{text-align:center;max-width:760px;margin:0 auto 38px}
    .eyebrow{display:inline-flex;padding:5px 12px;border:1px solid #c9d8ed;border-radius:99px;color:var(--theme);background:#eef4fc;font-size:12px;font-weight:700}
    .tools-intro h1{margin:14px 0 10px;color:var(--deep);font-size:clamp(30px,4vw,48px);line-height:1.2;letter-spacing:-1px}
    .tools-intro p{margin:0;color:var(--muted);font-size:16px}
    .tools-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}
    .tools-toolbar h2{margin:0;color:var(--deep);font-size:22px}
    .tools-toolbar span{color:var(--muted);font-size:13px}
    .tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .tool-card{display:flex;flex-direction:column;min-height:245px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 24px rgba(23,43,77,.05);transition:.2s}
    .tool-card:hover{transform:translateY(-4px);border-color:#b7cae7;box-shadow:0 14px 30px rgba(11,61,145,.12)}
    .tool-icon{display:flex;align-items:center;justify-content:center;width:52px;height:52px;margin-bottom:18px;border-radius:13px;background:#edf4ff;color:var(--theme);font-size:25px;overflow:hidden}
    .tool-icon img{width:34px;height:34px;object-fit:contain}
    .tool-card h3{margin:0 0 8px;color:var(--deep);font-size:18px}
    .tool-card p{display:-webkit-box;overflow:hidden;margin:0;color:var(--muted);font-size:13px;line-height:1.8;-webkit-box-orient:vertical;-webkit-line-clamp:3}
    .tool-link{margin-top:auto;padding-top:18px;color:var(--theme);font-size:13px;font-weight:700}
    .tools-note{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:30px;padding:22px 26px;border-radius:14px;background:linear-gradient(110deg,#07111f,#12376e);color:#dce9fb}
    .tools-note strong{display:block;color:#fff;font-size:17px}
    .tools-note span{font-size:13px;color:#bdcce1}
    .tools-note a{flex:none;padding:9px 16px;border:1px solid #7ea6df;border-radius:7px;color:#fff;font-size:13px}
    @media(max-width:1050px){
      .nav-link{padding-left:8px;padding-right:8px}
      .mega-menu{width:600px}
    }
    @media(max-width:820px){
      .main-nav{display:none}
      .header-btns .member-btn,.header-btns .open-btn{display:none}
      .hamburger{display:block}
      .header-inner{min-height:68px}
      .tools-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:560px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{align-items:flex-start;flex-direction:column;gap:0;padding:7px 0}
      .topbar a{margin-left:12px}
      .tools-page{padding-top:42px}
      .tools-grid{grid-template-columns:1fr}
      .tools-toolbar{align-items:flex-start;flex-direction:column;gap:3px}
      .tools-note{align-items:flex-start;flex-direction:column}
      .footer-grid{grid-template-columns:1fr;gap:23px;padding-top:35px}
      .footer-bottom{align-items:flex-start;flex-direction:column;gap:6px}
    }