:root{
      --theme:#0B3D91;
      --theme-dark:#082b67;
      --ink:#142033;
      --muted:#657187;
      --line:#e5eaf1;
      --soft:#f5f8fc;
      --white:#fff;
      --accent:#d9a441;
      --shadow:0 16px 45px rgba(12,35,72,.10);
      --radius:16px;
    }
    *{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}
    body.drawer-lock{overflow:hidden}
    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:#0e1727;color:#dbe5f4;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{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{min-height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:inline-flex;align-items:center;gap:10px;white-space:nowrap;font-weight:800;font-size:19px;color:var(--theme)}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:6px;padding:27px 13px;font-size:14px;color:#26354d;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .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:100%;left:50%;transform:translateX(-50%);opacity:0;visibility:hidden;pointer-events:none;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transition:.2s ease}
    .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;pointer-events:auto}
    .dropdown-panel{width:310px;padding:20px;border-radius:0 0 14px 14px}
    .dropdown-title,.mega-head strong{display:block;margin:0;color:var(--theme);font-size:16px}
    .dropdown-list{display:grid;gap:8px;margin:13px 0}
    .dropdown-list a{display:block;padding:7px 0;font-size:13px;border-bottom:1px solid #eef1f5}
    .dropdown-list a:hover{color:var(--theme)}
    .dropdown-more,.mega-footer{display:flex;justify-content:space-between;align-items:center;color:var(--theme);font-size:13px;font-weight:700;padding-top:11px}
    .mega-menu{width:min(920px,calc(100vw - 40px));padding:24px;border-radius:0 0 18px 18px}
    .mega-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:17px}
    .mega-head span{font-size:12px;color:var(--muted)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .mega-card{display:block;padding:14px;border:1px solid var(--line);border-radius:12px;background:#fff;transition:.2s}
    .mega-card:hover{border-color:#aac0e6;transform:translateY(-2px)}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:7px}
    .mega-card img.cover{width:100%;height:92px;object-fit:cover;border-radius:8px}
    .mega-card strong{display:block;font-size:13px;margin-bottom:3px}
    .mega-card p{font-size:12px;line-height:1.55;color:var(--muted);margin:4px 0 0}
    .mega-meta{display:flex;flex-wrap:wrap;gap:5px 12px;color:var(--muted);font-size:11px;margin-top:7px}
    .mega-categories{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
    .mega-categories a{padding:5px 11px;border-radius:20px;background:var(--soft);color:var(--theme);font-size:12px}
    .header-btns{display:flex;align-items:center;gap:13px}
    .member-entry{color:var(--theme);font-size:13px;font-weight:700}
    .account-entry{padding:8px 15px;color:#fff;background:var(--theme);border-radius:8px;font-size:13px}
    .account-entry:hover{background:var(--theme-dark)}
    .hamburger{display:none;width:40px;height:38px;border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--theme);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(8,20,40,.48);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(390px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.25s ease;z-index:41;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:72px;display:flex;align-items:center;gap:16px;padding:0 20px;border-bottom:1px solid var(--line);font-weight:700;color:var(--theme)}
    .drawer-head>a{margin-left:auto;padding:6px 12px;color:#fff;background:var(--theme);border-radius:6px;font-size:13px}
    .drawer-close{border:0;background:transparent;color:#68758a;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:transparent;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 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}

    .tools-page{background:linear-gradient(180deg,#f7faff 0,#fff 420px);padding-bottom:80px}
    .tools-hero{padding:76px 0 52px;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:22px;height:2px;background:var(--accent)}
    .tools-hero h1{font-size:clamp(34px,5vw,58px);line-height:1.18;letter-spacing:-.04em;margin:14px auto 16px;color:#101c30}
    .tools-hero p{max-width:680px;margin:0 auto;color:var(--muted);font-size:16px}
    .tools-filter{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:28px 0 0}
    .filter-chip{padding:8px 16px;border:1px solid #d8e2f0;border-radius:30px;background:#fff;color:#52627b;font-size:13px}
    .filter-chip.active,.filter-chip:hover{border-color:var(--theme);background:var(--theme);color:#fff}
    .tools-intro{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:0 0 22px}
    .tools-intro h2{margin:0;font-size:25px;color:#15243a}
    .tools-intro p{margin:0;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:260px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(17,41,78,.05);transition:.25s}
    .tool-card:hover{transform:translateY(-5px);border-color:#aec3e7;box-shadow:var(--shadow)}
    .tool-icon{display:flex;align-items:center;justify-content:center;width:58px;height:58px;margin-bottom:17px;border-radius:15px;background:#edf4ff;color:var(--theme);overflow:hidden}
    .tool-icon img{width:34px;height:34px;object-fit:contain}
    .tool-card h3{font-size:18px;margin:0 0 8px;color:#14243c}
    .tool-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}
    .tool-card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:20px}
    .tool-link{color:var(--theme);font-size:13px;font-weight:700}
    .tool-link:after{content:" →";transition:.2s}
    .tool-card:hover .tool-link:after{padding-left:4px}
    .tool-label{padding:4px 9px;border-radius:20px;background:#f5f7fa;color:#738198;font-size:11px}
    .tools-note{display:flex;align-items:center;gap:15px;margin-top:34px;padding:20px 24px;border-radius:14px;background:#10264b;color:#dce8fa}
    .tools-note strong{color:#fff}
    .tools-note p{margin:0;font-size:13px;color:#b9c9e2}
    .footer{background:#0d1728;color:#c5d1e2}
    .footer-main{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:40px;padding:58px 0 48px}
    .footer .logo{color:#fff;margin-bottom:15px}
    .footer .logo img{background:#fff;border-radius:7px}
    .footer-brand p{max-width:330px;margin:0;color:#94a7c0;font-size:13px;line-height:1.9}
    .footer h3{margin:0 0 16px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:9px}
    .footer-links a,.footer-contact a{color:#9eafc7;font-size:13px}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-contact{display:grid;gap:10px}
    .footer-social{font-size:13px;color:#9eafc7;line-height:1.7}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.1)}
    .footer-bottom-inner{display:flex;justify-content:space-between;gap:20px;padding:17px 0;color:#8193ac;font-size:12px}

    @media (max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .mega-grid{grid-template-columns:repeat(2,1fr)}
      .tools-grid{grid-template-columns:repeat(2,1fr)}
      .footer-main{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:3px}
      .topbar-contact{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:66px}
      .logo{font-size:16px}
      .logo img{width:31px;height:31px}
      .member-entry{display:none}
      .account-entry{padding:7px 10px}
      .tools-hero{padding:52px 0 38px}
      .tools-hero h1{font-size:37px}
      .tools-hero p{font-size:14px}
      .tools-intro{display:block}
      .tools-intro p{margin-top:6px}
      .tools-grid{grid-template-columns:1fr;gap:14px}
      .tool-card{min-height:230px}
      .mega-menu{width:calc(100vw - 28px)}
      .mega-grid{grid-template-columns:1fr}
      .footer-main{grid-template-columns:1fr;gap:28px;padding:42px 0 34px}
      .footer-bottom-inner{display:block;line-height:2}
    }