:root{
      --主题色:#0B3D91;
      --深色:#101828;
      --浅色:#f4f7fb;
      --边框:#dce4ef;
      --文字:#1d2939;
      --次文字:#667085;
      --白色:#fff;
      --阴影:0 18px 45px rgba(16,24,40,.08);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--文字);background:var(--浅色);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.6}
    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:#d7e3f5;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{color:#d7e3f5}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--边框)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:19px;font-weight:800;color:var(--深色)}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 13px;color:#344054;font-size:14px;font-weight:600;white-space:nowrap}
    .nav-link:hover{color:var(--主题色)}
    .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%);width:310px;padding:20px;background:#fff;border:1px solid var(--边框);border-radius:0 0 14px 14px;box-shadow:var(--阴影);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:30}
    .mega-menu{width:650px}
    .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:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .mega-title{margin:0 0 13px;color:var(--主题色);font-size:13px;font-weight:800}
    .dropdown-panel>a:not(.mega-footer){display:block;padding:9px 0;border-bottom:1px solid #eef2f6;font-size:14px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:block;min-height:84px;padding:12px;border:1px solid #e6ebf2;border-radius:10px;background:#fbfcfe}
    .mega-card:hover{border-color:#9db8df;background:#f3f7fc}
    .mega-card img{width:26px;height:26px;object-fit:contain;margin-bottom:5px}
    .mega-card strong{display:block;font-size:13px;color:var(--深色);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small{display:block;margin-top:3px;color:var(--次文字);font-size:11px;line-height:1.45}
    .mega-footer{display:block;margin-top:16px;padding-top:13px;border-top:1px solid var(--边框);color:var(--主题色);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-btn{font-size:13px;color:var(--主题色);font-weight:700}
    .open-account{padding:9px 16px;border-radius:7px;background:var(--主题色);color:#fff;font-size:13px;font-weight:700}
    .hamburger{display:none;width:42px;height:38px;padding:8px;border:1px solid var(--边框);border-radius:7px;background:#fff;cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--深色);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(10,22,42,.48);opacity:0;visibility:hidden;z-index:50;transition:.2s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:-360px;width:min(360px,88vw);height:100vh;background:#fff;z-index:51;overflow:auto;transition:right .25s;box-shadow:-10px 0 30px rgba(0,0,0,.16)}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--边框);font-weight:700}
    .drawer-head a{margin-left:auto;padding:7px 12px;background:var(--主题色);color:#fff;border-radius:6px;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:28px;color:#667085;cursor:pointer;line-height:1}
    .drawer-menu{padding:12px 20px 28px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border-bottom:1px solid #edf1f5;color:var(--深色);font-weight:600;text-align:left;background:none;border-left:0;border-right:0;border-top:0;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--主题色);font-size:20px;font-weight:400}
    .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(--次文字);font-size:14px}
    .footer{margin-top:72px;background:#0b1e3a;color:#ccd8e9}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:52px 0 42px}
    .footer strong{display:block;color:#fff;font-size:20px;margin-bottom:14px}
    .footer p{margin:8px 0;color:#aebed3;font-size:13px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-grid>div>a{display:block;margin:8px 0;color:#aebed3;font-size:13px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid rgba(255,255,255,.14);color:#91a5bd;font-size:12px}
    .tools-page{padding:0 0 1px}
    .tools-hero{padding:74px 0 58px;background:linear-gradient(135deg,#eef4fb 0%,#fff 58%,#e8f0fb 100%);border-bottom:1px solid var(--边框)}
    .tools-kicker{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;color:var(--主题色);font-size:13px;font-weight:800;letter-spacing:.08em}
    .tools-kicker:before{content:"";width:30px;height:2px;background:var(--主题色)}
    .tools-hero h1{max-width:760px;margin:0;font-size:clamp(34px,5vw,64px);line-height:1.12;letter-spacing:-.04em;color:var(--深色)}
    .tools-hero p{max-width:650px;margin:22px 0 0;color:var(--次文字);font-size:17px}
    .tools-search{display:flex;max-width:660px;margin-top:30px;padding:7px;background:#fff;border:1px solid #d7e1ee;border-radius:10px;box-shadow:0 10px 26px rgba(11,61,145,.08)}
    .tools-search input{min-width:0;flex:1;padding:12px 14px;border:0;outline:0;color:var(--文字);font-size:14px}
    .tools-search button{padding:0 22px;border:0;border-radius:7px;background:var(--主题色);color:#fff;font-weight:700;cursor:pointer}
    .tools-content{padding:54px 0}
    .section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}
    .section-heading h2{margin:0;color:var(--深色);font-size:28px;line-height:1.25}
    .section-heading p{margin:0;color:var(--次文字);font-size:14px}
    .tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .tool-card{display:flex;flex-direction:column;min-height:245px;padding:24px;background:#fff;border:1px solid var(--边框);border-radius:14px;box-shadow:0 6px 18px rgba(16,24,40,.035);transition:transform .2s,box-shadow .2s,border-color .2s}
    .tool-card:hover{transform:translateY(-4px);border-color:#a9c0e2;box-shadow:var(--阴影)}
    .tool-icon{display:flex;align-items:center;justify-content:center;width:50px;height:50px;margin-bottom:18px;border-radius:12px;background:#eaf1fb;color:var(--主题色);font-size:23px}
    .tool-icon img{width:30px;height:30px;object-fit:contain}
    .tool-card h3{margin:0 0 9px;color:var(--深色);font-size:18px}
    .tool-card p{display:-webkit-box;overflow:hidden;margin:0;color:var(--次文字);font-size:14px;line-height:1.7;-webkit-box-orient:vertical;-webkit-line-clamp:3}
    .tool-card-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;padding-top:18px}
    .tool-meta{color:#98a2b3;font-size:12px}
    .tool-enter{color:var(--主题色);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:repeat(3,1fr);gap:18px;margin-top:52px}
    .note-card{padding:22px;background:#f8fafc;border:1px solid var(--边框);border-radius:12px}
    .note-card strong{display:block;margin-bottom:8px;color:var(--深色)}
    .note-card span{color:var(--次文字);font-size:13px}
    .tools-empty{padding:28px;background:#fff;border:1px dashed #b7c7db;border-radius:12px;color:var(--次文字)}
    @media(max-width:1050px){
      .nav-link{padding-left:8px;padding-right:8px}
      .header-inner{gap:14px}
      .member-btn{display:none}
    }
    @media(max-width:820px){
      .container{width:min(100% - 30px,620px)}
      .topbar .container{align-items:flex-start;flex-direction:column;padding:9px 0;gap:3px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .main-nav{display:none}
      .hamburger{display:block}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .tools-hero{padding:52px 0 44px}
      .tool-grid{grid-template-columns:repeat(2,1fr)}
      .tools-note{grid-template-columns:1fr}
    }
    @media(max-width:560px){
      .header-inner{min-height:66px}
      .logo span{font-size:16px}
      .logo img{width:31px;height:31px}
      .open-account{padding:8px 11px}
      .tools-hero h1{font-size:38px}
      .tools-hero p{font-size:15px}
      .tools-search{display:block;padding:7px}
      .tools-search input{width:100%;height:46px}
      .tools-search button{width:100%;height:42px}
      .section-heading{display:block}
      .section-heading h2{font-size:24px;margin-bottom:8px}
      .tool-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{display:block;line-height:1.9}
      .footer-bottom span{display:block}
    }