:root{
      --theme:#0B3D91;
      --theme-dark:#082b68;
      --ink:#14243d;
      --muted:#68778d;
      --line:#dce5f0;
      --soft:#f4f7fb;
      --white:#fff;
      --accent:#f47b35;
      --shadow:0 18px 48px rgba(16,45,88,.12);
      --radius:18px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    button{font:inherit}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .skip-link{position:absolute;left:-9999px;top:10px;z-index:1000;background:var(--theme);color:#fff;padding:8px 14px;border-radius:5px}
    .skip-link:focus{left:15px}
    .topbar{background:#071d43;color:#dbe8ff;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{display:flex;gap:20px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:30;background:#fff;border-bottom:1px solid #e7edf5}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:inline-flex;align-items:center;gap:10px;color:var(--theme);font-weight:800;white-space:nowrap}
    .logo img{width:38px;height:38px;object-fit:contain}
    .logo span{font-size:19px;letter-spacing:.02em}
    .main-nav{margin-left:auto}
    .nav-list{list-style:none;margin:0;padding:0;display:flex;align-items:stretch;gap:4px}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 13px;color:#273a58;font-size:15px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{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) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(8px);opacity:0;visibility:hidden;pointer-events:none;background:#fff;border:1px solid #e4ebf4;border-radius:0 0 16px 16px;box-shadow:var(--shadow);transition:.2s ease;z-index:50}
    .nav-item:after{content:"";position:absolute;left:0;right:0;top:100%;height:12px}
    .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;transform:translateX(-50%) translateY(0)}
    .dropdown-panel{width:310px;padding:20px}
    .dropdown-title,.mega-heading{display:flex;flex-direction:column;gap:3px;margin-bottom:14px}
    .dropdown-title,.mega-heading strong{font-size:16px;color:var(--ink)}
    .mega-heading span{font-size:12px;color:var(--muted);font-weight:400}
    .dropdown-article{display:block;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}
    .dropdown-article:hover{color:var(--theme)}
    .dropdown-more,.mega-footer{display:block;margin-top:15px;color:var(--theme);font-size:13px;font-weight:700}
    .mega-menu{width:720px;padding:22px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #e8eef6;border-radius:11px;background:#fbfcfe;min-width:0}
    .mega-card:hover{border-color:#abc0e2;background:#f3f7fd}
    .mega-card>img{width:42px;height:42px;border-radius:8px;object-fit:cover;background:#edf2f9;flex:0 0 auto}
    .mega-card-content{display:flex;flex-direction:column;min-width:0}
    .mega-card-content strong{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card-content p{font-size:11px;color:var(--muted);margin:3px 0 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .mega-card-meta{display:flex;flex-wrap:wrap;gap:7px;color:var(--muted);font-size:10px;margin-top:3px}
    .mega-categories{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 15px}
    .mega-categories a{padding:5px 10px;border-radius:20px;background:#eef4fc;color:var(--theme);font-size:12px}
    .header-btns{display:flex;align-items:center;gap:12px}
    .header-btns>a,.drawer-head>a{background:var(--theme);color:#fff;border-radius:8px;padding:9px 15px;font-size:13px;font-weight:700}
    .header-btns>a:hover,.drawer-head>a:hover{background:var(--theme-dark)}
    .hamburger{display:none;width:42px;height:40px;padding:8px;border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:var(--theme);margin:5px auto;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(2,18,44,.48);opacity:0;visibility:hidden;transition:.25s;z-index:70}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(390px,88vw);background:#fff;transform:translateX(100%);transition:.25s;z-index:80;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:10px;padding:20px;border-bottom:1px solid var(--line)}
    .drawer-head>a{margin-left:auto;padding:7px 12px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:12px 20px 28px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 4px;border:0;border-bottom:1px solid #edf1f6;background:#fff;color:var(--ink);text-align:left;font-weight:650;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px;font-weight:400}
    .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;color:var(--muted);font-size:14px}
    .drawer-submenu a:hover{color:var(--theme)}
    .drawer-locked{overflow:hidden}
    .tools-page{padding:0 0 86px;background:linear-gradient(180deg,#f7faff 0,#fff 430px)}
    .tools-hero{padding:72px 0 48px;text-align:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.12em}
    .eyebrow:before{content:"";display:block;width:28px;height:2px;background:var(--accent)}
    .tools-hero h1{max-width:780px;margin:17px auto 14px;font-size:clamp(34px,5vw,60px);line-height:1.16;letter-spacing:-.04em;color:#102d5e}
    .tools-hero p{max-width:660px;margin:0 auto;color:var(--muted);font-size:17px}
    .tool-filter{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:28px auto 0}
    .tool-filter a{border:1px solid #ccd9eb;border-radius:30px;padding:8px 17px;background:#fff;color:#526883;font-size:13px}
    .tool-filter a:first-child,.tool-filter a:hover{background:var(--theme);border-color:var(--theme);color:#fff}
    .tools-board{padding:24px;border:1px solid #e0e9f4;border-radius:24px;background:rgba(255,255,255,.92);box-shadow:var(--shadow)}
    .tools-board-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:20px}
    .tools-board-head h2{margin:0;color:#142f61;font-size:25px}
    .tools-board-head p{margin:4px 0 0;color:var(--muted);font-size:14px}
    .tools-count{color:var(--theme);font-size:13px;font-weight:700;white-space:nowrap}
    .tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .tool-card{display:flex;flex-direction:column;min-height:245px;padding:22px;border:1px solid #e2eaf4;border-radius:16px;background:#fff;transition:.2s ease}
    .tool-card:hover{transform:translateY(-4px);border-color:#a7bddf;box-shadow:0 14px 32px rgba(11,61,145,.12)}
    .tool-icon{display:flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:15px;background:#edf4ff;margin-bottom:16px}
    .tool-icon img{width:34px;height:34px;object-fit:contain}
    .tool-card h3{margin:0 0 8px;color:#17386f;font-size:19px}
    .tool-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .tool-card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:18px}
    .tool-meta{font-size:12px;color:#8a98aa}
    .tool-enter{color:var(--theme);font-size:13px;font-weight:800}
    .tool-enter:after{content:" →";transition:.2s}
    .tool-card:hover .tool-enter:after{padding-left:4px}
    .tools-note{display:grid;grid-template-columns:1.2fr 1fr;gap:20px;margin-top:24px}
    .note-card{padding:25px;border-radius:18px;background:#102f66;color:#fff}
    .note-card h2{margin:0 0 8px;font-size:20px}
    .note-card p{margin:0;color:#cad9f1;font-size:14px}
    .note-card.light{background:#f3f7fc;color:var(--ink);border:1px solid #e0e9f4}
    .note-card.light p{color:var(--muted)}
    .footer{background:#071d43;color:#d6e2f5}
    .footer-main{display:grid;grid-template-columns:1.45fr 1fr 1fr 1fr;gap:42px;padding:54px 0 42px}
    .footer .logo{color:#fff;margin-bottom:15px}
    .footer .logo img{background:#fff;border-radius:7px}
    .footer-brand p{max-width:320px;margin:0;color:#9eb4d2;font-size:13px;line-height:1.8}
    .footer h3{margin:5px 0 16px;color:#fff;font-size:15px}
    .footer-links,.footer-contact{display:flex;flex-direction:column;gap:9px;font-size:13px;color:#a9bdd7}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-social{display:flex;flex-direction:column;gap:4px;margin-top:8px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:19px 0;border-top:1px solid rgba(210,228,255,.15);color:#91a9c8;font-size:12px}
    .footer-bottom-links{display:flex;gap:18px}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .tools-grid{grid-template-columns:repeat(2,1fr)}
      .footer-main{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:680px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start}
      .topbar-contact{gap:8px;flex-direction:column;text-align:right}
      .header-inner{min-height:68px;gap:10px}
      .header-btns>a{display:none}
      .logo span{font-size:16px}
      .tools-hero{padding:50px 0 32px}
      .tools-hero h1{font-size:36px}
      .tools-hero p{font-size:15px}
      .tools-board{padding:15px;border-radius:17px}
      .tools-board-head{display:block}
      .tools-count{display:block;margin-top:8px}
      .tools-grid{grid-template-columns:1fr;gap:12px}
      .tool-card{min-height:220px;padding:18px}
      .tools-note{grid-template-columns:1fr}
      .footer-main{grid-template-columns:1fr;gap:26px;padding:38px 0 30px}
      .footer-bottom{display:block}
      .footer-bottom-links{display:block;margin-top:8px}
      .footer-bottom-links span{display:block;margin-top:4px}
    }