:root{
      --theme:#0B3D91;
      --ink:#142238;
      --muted:#6f7c91;
      --line:#e4eaf2;
      --paper:#f5f8fc;
      --white:#fff;
      --accent:#f2b84b;
      --shadow:0 18px 50px rgba(18,43,79,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:"PingFang SC","Microsoft YaHei",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:#091b36;color:#dfe8f7;font-size:13px}
    .topbar-inner{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar-contact{display:flex;gap:22px}
    .topbar a{color:#dfe8f7}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;color:var(--theme);font-weight:800;font-size:18px}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 13px;font-size:15px;font-weight:600;color:#27364e}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);margin-top:-4px}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);visibility:hidden;opacity:0;pointer-events:none;transition:.2s ease;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 16px 16px}
    .dropdown-panel{width:250px;padding:12px}
    .dropdown-panel a{display:block;padding:9px 12px;border-radius:8px;font-size:14px}
    .dropdown-panel a:hover{background:#f1f5fb;color:var(--theme)}
    .dropdown-footer,.mega-footer{color:var(--theme)!important;font-weight:700;border-top:1px solid var(--line);margin-top:8px;padding-top:12px!important}
    .mega-menu{width:760px;padding:22px}
    .nav-item:hover>.mega-menu,.nav-item:hover>.dropdown-panel,.nav-item:focus-within>.mega-menu,.nav-item:focus-within>.dropdown-panel{visibility:visible;opacity:1;pointer-events:auto}
    .mega-menu:before{content:"";position:absolute;left:0;right:0;top:-15px;height:15px}
    .mega-title-row{display:flex;justify-content:space-between;gap:20px;margin-bottom:16px}
    .mega-title-row strong{font-size:17px}
    .mega-title-row span{font-size:13px;color:var(--muted)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{padding:12px;border:1px solid var(--line);border-radius:12px;transition:.2s}
    .mega-card:hover{border-color:#9fb7da;box-shadow:0 8px 20px rgba(11,61,145,.08)}
    .mega-card-head{display:flex;align-items:center;gap:9px}
    .mega-card-head img{width:30px;height:30px;object-fit:contain;border-radius:6px}
    .mega-card strong{display:block;font-size:13px}
    .mega-card p{margin:7px 0 0;color:var(--muted);font-size:12px;line-height:1.5}
    .mega-card>img{width:100%;height:74px;object-fit:cover;border-radius:8px;margin-bottom:8px}
    .mega-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px;color:var(--muted);font-size:11px}
    .rating{display:block;color:#b17813;font-size:11px}
    .category-links{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
    .category-links a{padding:5px 10px;background:#f2f6fb;color:var(--theme);border-radius:20px;font-size:12px}
    .header-btns{display:flex;align-items:center;gap:12px}
    .member-entry{color:var(--theme);font-size:14px;font-weight:700}
    .account-entry{background:var(--theme);color:#fff;padding:8px 15px;border-radius:8px;font-size:14px}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:9px}
    .hamburger span{display:block;height:2px;background:var(--theme);margin:5px 0;transition:.2s}
    .hamburger.active span:first-child{transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-7px) rotate(-45deg)}

    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(5,19,40,.45);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:50;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.28s ease;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:15px;padding:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:700}
    .drawer-head>a{margin-left:auto;background:var(--theme);color:#fff;padding:5px 12px;border-radius:6px;font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;color:var(--muted);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-weight:600;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 12px;background:#f7f9fc}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}

    .tool-detail-page{padding:42px 0 76px}
    .breadcrumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:26px}
    .breadcrumb a:hover{color:var(--theme)}
    .tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}
    .tool-main,.tool-sidebar{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 28px rgba(20,45,80,.05)}
    .tool-main{padding:34px}
    .tool-heading{display:flex;align-items:flex-start;gap:20px;padding-bottom:26px;border-bottom:1px solid var(--line)}
    .tool-icon{width:78px;height:78px;object-fit:contain;border:1px solid var(--line);border-radius:16px;padding:12px;background:#f8fbff;flex:none}
    .tool-heading h1{margin:0 0 8px;font-size:32px;line-height:1.25;letter-spacing:-.02em}
    .tool-intro{margin:0;color:var(--muted);font-size:16px}
    .tool-meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:16px;color:var(--muted);font-size:13px}
    .tool-meta span{padding-right:14px;border-right:1px solid var(--line)}
    .tool-meta span:last-child{border-right:0}
    .tool-body{min-width:0;max-width:100%;overflow-x:auto;padding-top:28px;color:#34445b}
    .tool-body h2,.tool-body h3{color:var(--ink);line-height:1.35}
    .tool-body h2{font-size:22px;margin:26px 0 12px}
    .tool-body h3{font-size:18px;margin:22px 0 10px}
    .tool-body p{margin:0 0 16px}
    .tool-body ul,.tool-body ol{padding-left:24px}
    .tool-body img,.tool-body table{max-width:100%;height:auto}
    .tool-body table{border-collapse:collapse;width:100%;margin:18px 0}
    .tool-body th,.tool-body td{border:1px solid var(--line);padding:10px;text-align:left}
    .tool-body th{background:#f5f8fc}
    .tool-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;padding-top:24px;border-top:1px solid var(--line)}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 18px;border-radius:9px;font-weight:700}
    .primary-btn{background:var(--theme);color:#fff}
    .secondary-btn{border:1px solid #c8d5e6;color:var(--theme);background:#fff}
    .tool-sidebar{padding:24px;position:sticky;top:20px}
    .tool-sidebar h2{font-size:19px;margin:0 0 16px}
    .related-tool{display:grid;grid-template-columns:48px 1fr;gap:11px;padding:14px 0;border-top:1px solid var(--line)}
    .related-tool img{width:48px;height:48px;object-fit:contain;border:1px solid var(--line);border-radius:10px;padding:7px}
    .related-tool strong{display:block;font-size:14px;color:var(--ink)}
    .related-tool p{margin:3px 0 0;color:var(--muted);font-size:12px;line-height:1.5}
    .sidebar-note{margin-top:20px;padding:14px;background:#f2f6fb;border-radius:10px;color:var(--muted);font-size:12px}

    .footer{background:#091b36;color:#c9d6e8;padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px}
    .footer .logo{color:#fff;margin-bottom:14px}
    .footer-brand p{margin:0;color:#aebdd0;font-size:13px;max-width:310px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:8px;font-size:13px}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-contact{display:grid;gap:8px;font-size:13px}
    .social-entry{color:#fff!important;font-weight:700}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.14);margin-top:35px;padding-top:18px;color:#93a7c0;font-size:12px}
    .risk-note{max-width:620px;text-align:right}

    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .tool-layout{grid-template-columns:1fr}
      .tool-sidebar{position:static}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{height:auto;min-height:38px;padding:7px 0;align-items:flex-start;gap:8px}
      .topbar-contact{gap:8px;flex-direction:column;align-items:flex-end}
      .account-entry{display:none}
      .header-inner{height:68px;gap:10px}
      .logo{font-size:16px}
      .header-btns{margin-left:auto}
      .tool-detail-page{padding:26px 0 50px}
      .tool-main{padding:22px 18px}
      .tool-heading{gap:13px}
      .tool-icon{width:58px;height:58px;padding:8px}
      .tool-heading h1{font-size:24px}
      .tool-intro{font-size:14px}
      .tool-meta{gap:8px;font-size:12px}
      .tool-meta span{padding-right:8px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:26px 18px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .risk-note{margin-top:10px;text-align:left}
    }
    @media(max-width:430px){
      .footer-grid{grid-template-columns:1fr}
      .topbar{font-size:11px}
      .topbar-contact{font-size:11px}
    }