:root{--theme:#0B3D91;--ink:#17243a;--muted:#6b778c;--line:#e5eaf1;--bg:#f5f7fb;--white:#fff;--accent:#d81b71}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);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}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#10223f;color:#dce6f5;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between}
    .topbar-links{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
    .header-inner{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;white-space:nowrap;color:var(--theme)}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:2px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 13px;font-size:14px;font-weight:600;white-space:nowrap}
    .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:310px;background:#fff;border:1px solid var(--line);border-radius:0 0 12px 12px;box-shadow:0 18px 40px rgba(17,36,64,.14);padding:20px;opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:650px}
    .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;top:-12px;left:0;right:0;height:12px}
    .drop-title,.mega-title{margin:0 0 12px;color:var(--theme);font-size:14px;font-weight:800}
    .drop-list{display:grid;gap:8px}
    .drop-list a{font-size:13px;padding:7px 0;border-bottom:1px solid #f0f2f6}
    .drop-list a:hover{color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:24px}
    .mega-items{display:grid;grid-template-columns:1fr 1fr;gap:8px}
    .mega-card{display:flex;gap:8px;align-items:center;border:1px solid #edf0f5;border-radius:8px;padding:8px;min-width:0}
    .mega-card:hover{border-color:#b8c8e4;background:#f7faff}
    .mega-card img{width:30px;height:30px;object-fit:cover;border-radius:6px;flex:none}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:12px}.mega-card small{color:var(--muted);font-size:10px}
    .mega-footer{display:inline-block;margin-top:15px;color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-link{font-size:13px;color:var(--theme)}
    .open-account{background:var(--theme);color:#fff;border-radius:6px;padding:9px 15px;font-size:13px;font-weight:700}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:var(--ink);margin:4px 0;transition:.2s}
    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(7,18,36,.5);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(360px,88vw);height:100vh;background:#fff;z-index:50;transform:translateX(100%);transition:.25s;overflow:auto;box-shadow:-10px 0 30px rgba(0,0,0,.16)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;background:var(--theme);color:#fff;border-radius:5px;padding:5px 10px;font-size:12px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;text-align:left;border:0;border-bottom:1px solid #edf0f4;background:none;font:inherit;color:var(--ink);cursor:pointer}
    .drawer-group .drawer-toggle:after{content:"+";float:right;color:var(--muted)}
    .drawer-group .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;font-size:13px;color:var(--muted)}
    .footer{background:#101d33;color:#bec9d9;margin-top:70px;padding:48px 0 20px;font-size:13px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:35px}
    .footer strong{color:#fff;font-size:19px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:14px}
    .footer p{margin:8px 0}
    .footer-grid>div:not(:first-child) a{display:block;margin:8px 0;color:#bec9d9}
    .footer a:hover{color:#fff}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:12px}
    .tools-page{padding:58px 0 5px}
    .tools-heading{text-align:center;max-width:720px;margin:0 auto 34px}
    .tools-heading .eyebrow{display:inline-block;color:var(--accent);font-size:12px;font-weight:800;letter-spacing:2px;margin-bottom:8px}
    .tools-heading h1{font-size:clamp(30px,4vw,46px);line-height:1.2;margin:0 0 13px;color:#14223a}
    .tools-heading p{color:var(--muted);margin:0;font-size:15px}
    .tools-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px;padding:14px 18px;background:#fff;border:1px solid var(--line);border-radius:10px}
    .tools-toolbar strong{font-size:15px}
    .tool-filter{display:flex;gap:8px;flex-wrap:wrap}
    .tool-filter a{border:1px solid #dce4ef;border-radius:20px;padding:5px 12px;font-size:12px;color:var(--muted)}
    .tool-filter a:hover,.tool-filter a.active{color:var(--theme);border-color:#a9bddf;background:#f2f6fd}
    .tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .tool-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:13px;padding:22px;min-height:230px;box-shadow:0 6px 20px rgba(31,55,88,.04);transition:.2s}
    .tool-card:hover{transform:translateY(-4px);border-color:#a9bddf;box-shadow:0 12px 26px rgba(21,61,114,.11)}
    .tool-icon{width:52px;height:52px;border-radius:13px;background:#edf3fc;display:flex;align-items:center;justify-content:center;margin-bottom:15px;overflow:hidden}
    .tool-icon img{width:34px;height:34px;object-fit:contain}
    .tool-card h2{font-size:18px;margin:0 0 8px;color:#152641}
    .tool-card p{font-size:13px;color:var(--muted);margin:0;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:18px}
    .tool-card-footer small{color:#9aa5b5;font-size:11px}
    .tool-card-footer a{color:var(--theme);font-size:13px;font-weight:700}
    .tools-note{margin-top:28px;padding:20px 24px;border-radius:12px;background:#eaf1fb;color:#365170;font-size:13px}
    .tools-note strong{color:var(--theme)}
    @media(max-width:1050px){
      .nav-link{padding-left:8px;padding-right:8px}
      .header-inner{gap:12px}
      .mega-menu{width:580px}
    }
    @media(max-width:800px){
      .container{width:min(100% - 28px,620px)}
      .topbar .container{min-height:42px}
      .topbar-links{gap:10px}.topbar-links a:first-child{display:none}
      .main-nav{display:none}.hamburger{display:block}
      .header-inner{height:68px}
      .member-link{display:none}
      .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
      .tool-grid{grid-template-columns:1fr 1fr}
      .tools-page{padding-top:38px}
    }
    @media(max-width:560px){
      .topbar{font-size:11px}
      .open-account{padding:8px 10px}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}
      .tools-toolbar{display:block}.tool-filter{margin-top:12px}
      .tool-grid{grid-template-columns:1fr}
      .tool-card{min-height:210px}
    }