:root{
      --theme:#0B3D91;
      --deep:#071b45;
      --ink:#10254d;
      --muted:#64748b;
      --line:#dce6f4;
      --soft:#f3f7fc;
      --white:#fff;
      --shadow:0 18px 50px rgba(7,27,69,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;background:#f7faff;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:var(--deep);color:#dce9ff;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-right{display:flex;gap:20px}
    .topbar a:hover{color:#fff}

    .header{height:78px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
    .header-inner{height:100%;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;min-width:178px;font-size:18px;font-weight:800;color:var(--deep)}
    .logo img{width:36px;height:36px;object-fit:contain;border-radius:9px}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:4px;list-style:none;margin:0;padding:0;height:78px}
    .nav-item{position:relative;display:flex;align-items:center}
    .nav-link{padding:26px 14px;color:#334766;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";display:inline-block;width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg);margin:0 0 3px 8px}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;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 16px 16px}
    .dropdown-panel{width:260px;padding:12px}
    .dropdown-panel a{display:block;padding:10px 12px;font-size:14px;border-radius:8px}
    .dropdown-panel a:hover{background:var(--soft);color:var(--theme)}
    .mega-menu{width:760px;padding:20px}
    .nav-item:hover .mega-menu,.nav-item:focus-within .mega-menu,.nav-item:hover .dropdown-panel,.nav-item:focus-within .dropdown-panel{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
    .mega-heading{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:14px}
    .mega-heading strong{font-size:16px;color:var(--deep)}
    .mega-heading a,.mega-footer{color:var(--theme);font-size:13px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #edf2f8;border-radius:11px;min-width:0}
    .mega-card:hover{border-color:#a9c4ed;background:#f8fbff}
    .mega-card img{width:42px;height:42px;object-fit:cover;border-radius:8px;background:#eef4fc;flex:none}
    .mega-card span{min-width:0}
    .mega-card b,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card b{font-size:13px}.mega-card small{font-size:11px;color:var(--muted)}
    .mega-footer{display:block;border-top:1px solid var(--line);margin-top:15px;padding-top:14px}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-link{font-size:14px;color:var(--theme)}
    .open-account{background:var(--theme);color:#fff;padding:9px 16px;border-radius:8px;font-size:14px}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:var(--deep);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(4,16,40,.48);opacity:0;visibility:hidden;transition:.25s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(360px,88vw);height:100vh;background:#fff;z-index:41;transform:translateX(100%);transition:.3s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:72px;padding:0 20px;display:flex;align-items:center;gap:16px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head a{margin-left:auto;color:var(--theme);font-size:14px}
    .drawer-close{border:0;background:transparent;font-size:30px;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{width:100%;display:block;text-align:left;padding:14px 2px;background:none;border:0;border-bottom:1px solid #eef2f7;color:var(--ink);cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 8px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;font-size:14px;color:var(--muted)}

    .tools-page{padding-bottom:70px}
    .tools-hero{padding:76px 0 55px;background:linear-gradient(135deg,#eef5ff 0%,#fff 54%,#e9f1ff 100%);border-bottom:1px solid var(--line);text-align:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:700;letter-spacing:.08em}
    .eyebrow:before{content:"";width:28px;height:2px;background:var(--theme)}
    .tools-hero h1{font-size:clamp(34px,5vw,62px);line-height:1.12;margin:16px 0 18px;color:var(--deep);letter-spacing:-.04em}
    .tools-hero p{max-width:680px;margin:0 auto;color:var(--muted);font-size:17px}
    .tools-summary{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:28px}
    .summary-pill{padding:8px 15px;border:1px solid #c9d9f1;border-radius:999px;background:#fff;color:#3e5a82;font-size:13px}

    .tools-content{padding-top:42px}
    .tools-toolbar{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}
    .tools-toolbar h2{margin:0;color:var(--deep);font-size:26px}
    .tools-toolbar p{margin:5px 0 0;color:var(--muted);font-size:14px}
    .tool-filter{display:flex;gap:8px;flex-wrap:wrap}
    .tool-filter span{padding:7px 12px;border-radius:8px;background:#e7f0ff;color:var(--theme);font-size:13px}
    .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:var(--radius);padding:24px;min-height:255px;box-shadow:0 6px 24px rgba(7,27,69,.04);transition:.25s}
    .tool-card:hover{transform:translateY(-5px);border-color:#9dbbe8;box-shadow:var(--shadow)}
    .tool-icon{width:54px;height:54px;object-fit:contain;border-radius:14px;background:#eef5ff;padding:10px;margin-bottom:18px}
    .tool-card h3{font-size:19px;margin:0 0 8px;color:var(--deep)}
    .tool-card p{margin:0;color:var(--muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .tool-meta{margin-top:auto;padding-top:18px;display:flex;justify-content:space-between;align-items:center;color:#91a0b6;font-size:12px;border-top:1px solid #eef2f8}
    .tool-more{color:var(--theme);font-weight:700;font-size:13px}
    .tools-note{margin-top:30px;padding:20px 24px;border-radius:14px;background:#eaf2ff;color:#496485;font-size:13px}

    .footer{background:var(--deep);color:#bdcbe0;padding:52px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}
    .footer-brand{font-size:21px;font-weight:800;color:#fff;margin-bottom:14px}
    .footer p{margin:7px 0;font-size:13px}
    .footer h3{font-size:15px;color:#fff;margin:0 0 14px}
    .footer-grid>div>a{display:block;font-size:13px;margin:8px 0;color:#bdcbe0}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:35px;padding-top:18px;text-align:center;font-size:12px;color:#8ea4c4}

    @media(max-width:980px){
      .main-nav{display:none}.hamburger{display:block}.header-btns{margin-left:auto}
      .tool-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:7px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-right{gap:12px;font-size:12px}
      .header{height:68px}.header-inner{gap:8px}.logo{min-width:0}.logo span{font-size:16px}.logo img{width:31px;height:31px}
      .member-link,.open-account{display:none}
      .tools-hero{padding:54px 0 42px}.tools-hero p{font-size:15px}
      .tools-toolbar{display:block}.tool-filter{margin-top:15px}
      .tool-grid{grid-template-columns:1fr;gap:14px}
      .tool-card{min-height:220px}
      .footer-grid{grid-template-columns:1fr;gap:24px}
      .mega-menu{display:none}
    }