:root{
      --primary:#0B3D91;
      --primary-dark:#082b69;
      --ink:#14233d;
      --muted:#68758b;
      --line:#e4eaf2;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 16px 42px rgba(19,48,91,.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:#0b1e3a;color:#d9e5f7;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .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{height:78px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--primary);font-size:19px;font-weight:800}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{list-style:none;padding:0;margin:0;display:flex;align-items:center;justify-content:center;gap:4px}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:6px;padding:27px 14px;color:#263752;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--primary)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{
      position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%) translateY(8px);
      width:280px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;
      box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30
    }
    .mega-menu{width:620px}
    .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;left:0;right:0;top:-12px;height:12px}
    .panel-title{margin:0 0 12px;color:var(--primary);font-size:14px;font-weight:800}
    .panel-list{display:grid;gap:8px}
    .panel-list a{padding:7px 0;color:#42536d;border-bottom:1px solid #edf1f6;font-size:14px}
    .panel-list a:hover{color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:9px;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe}
    .mega-card:hover{border-color:#a9c0e7;background:#f4f8ff}
    .mega-card img{width:32px;height:32px;object-fit:contain;border-radius:6px}
    .mega-card span{min-width:0;display:grid;gap:2px}
    .mega-card strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small{font-size:11px;color:var(--muted);line-height:1.4}
    .mega-footer{display:block;margin-top:15px;padding-top:13px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:700}

    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-link{color:var(--primary);font-size:14px;font-weight:700}
    .open-link{padding:9px 15px;background:var(--primary);color:#fff;border-radius:8px;font-size:13px}
    .open-link:hover{background:var(--primary-dark)}
    .hamburger{display:none;width:42px;height:38px;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--primary);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{position:fixed;inset:0;background:rgba(8,28,58,.48);opacity:0;visibility:hidden;transition:.25s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(360px,88vw);background:#fff;transform:translateX(100%);transition:.3s;z-index:50;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:70px;padding:0 20px;display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--line);color:var(--primary);font-weight:800}
    .drawer-head span{flex:1}
    .drawer-head a{font-size:13px;padding:6px 10px;border-radius:6px;background:var(--primary);color:#fff}
    .drawer-close{border:0;background:transparent;color:#50617a;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:var(--ink);font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--primary)}
    .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}

    .tools-page{background:#f7f9fc}
    .tools-hero{padding:76px 0 60px;text-align:center;background:linear-gradient(135deg,#eef4ff 0%,#fff 55%,#edf6ff 100%);border-bottom:1px solid var(--line)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--primary)}
    .tools-hero h1{margin:15px 0 13px;font-size:clamp(32px,5vw,54px);line-height:1.2;letter-spacing:-.04em}
    .tools-hero p{max-width:680px;margin:0 auto;color:var(--muted);font-size:16px}
    .tools-quick{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:28px}
    .tools-quick a{padding:8px 15px;border:1px solid #c8d7ed;border-radius:99px;background:#fff;color:var(--primary);font-size:13px}
    .tools-quick a:hover{background:var(--primary);color:#fff}

    .tools-content{padding:58px 0 82px}
    .section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}
    .section-heading h2{margin:0;font-size:27px}
    .section-heading p{margin:0;color:var(--muted);font-size:14px}
    .tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .tool-card{display:flex;flex-direction:column;min-height:250px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 6px 20px rgba(20,45,83,.04);transition:.25s}
    .tool-card:hover{transform:translateY(-5px);border-color:#abc3e9;box-shadow:var(--shadow)}
    .tool-icon{width:58px;height:58px;display:grid;place-items:center;margin-bottom:18px;border-radius:15px;background:#edf3ff;color:var(--primary)}
    .tool-icon img{width:38px;height:38px;object-fit:contain}
    .tool-card h3{margin:0 0 8px;font-size:19px}
    .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-footer{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;padding-top:20px}
    .tool-more{color:var(--primary);font-size:13px;font-weight:800}
    .tool-more:after{content:" →";transition:.2s}
    .tool-card:hover .tool-more:after{padding-left:4px}
    .tool-type{padding:4px 8px;border-radius:5px;background:#f1f4f8;color:#718096;font-size:11px}
    .tools-note{margin-top:40px;padding:24px 28px;border:1px solid #d8e4f4;border-radius:14px;background:#edf4ff}
    .tools-note h3{margin:0 0 6px;color:var(--primary);font-size:18px}
    .tools-note p{margin:0;color:#52647d;font-size:14px}

    .footer{padding:55px 0 20px;background:#0b1e3a;color:#c4d0e1}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:38px}
    .footer-brand{margin-bottom:12px;color:#fff;font-size:20px;font-weight:800}
    .footer p{margin:7px 0;color:#9eafc6;font-size:13px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:8px}
    .footer-links a,.footer-links span{color:#aebdd0;font-size:13px}
    .footer-links a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);color:#8fa1ba;font-size:12px}

    @media(max-width:1050px){
      .header-inner{gap:15px}.logo{min-width:165px}.nav-link{padding-left:8px;padding-right:8px;font-size:14px}
      .tool-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:820px){
      .topbar .container{padding:8px 0;align-items:flex-start}.topbar .container,.topbar-links{flex-direction:column;gap:2px}
      .header-inner{height:68px}.main-nav{display:none}.header-btns{margin-left:auto}.hamburger{display:block}
      .member-link{display:none}.mega-menu{width:min(620px,calc(100vw - 30px))}
      .tools-hero{padding:58px 0 48px}.footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:560px){
      .container{width:min(100% - 28px,1180px)}
      .tools-hero h1{font-size:35px}.tools-hero p{font-size:14px}
      .tools-content{padding:40px 0 55px}.section-heading{display:block}.section-heading p{margin-top:7px}
      .tool-grid{grid-template-columns:1fr;gap:14px}.tool-card{min-height:220px}
      .footer-grid{grid-template-columns:1fr;gap:26px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:5px}
    }