:root{
  --theme:#0B3D91;
  --theme-deep:#082b68;
  --ink:#172033;
  --muted:#6b7280;
  --line:#e6eaf0;
  --soft:#f4f7fb;
  --white:#fff;
  --shadow:0 16px 45px rgba(11,61,145,.1);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#f7f9fc;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
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}

.topbar{background:#10203c;color:#cbd6e8;font-size:13px}
.topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between}
.topbar a{color:#fff}
.contact{display:flex;gap:8px;align-items:center}

.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;font-weight:800;font-size:20px;color:var(--theme)}
.logo img{width:38px;height:38px;object-fit:contain}
.main-nav{flex:1}
.nav-list{display:flex;align-items:center;justify-content:center;gap:4px;padding:0;margin:0;list-style:none}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:5px;padding:27px 14px;font-size:15px;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:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(8px);width:310px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:0 18px 40px rgba(20,35,65,.14);opacity:0;visibility:hidden;transition:.22s ease}
.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;transform:translateX(-50%) translateY(0)}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.panel-title{font-weight:800;color:var(--theme);margin-bottom:12px;border-bottom:1px solid var(--line);padding-bottom:10px}
.dropdown-panel>a{display:block;padding:8px 0;border-bottom:1px solid #f0f2f6;font-size:14px}
.dropdown-panel>a:hover,.mega-menu a:hover{color:var(--theme)}
.mega-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:22px}
.mega-list{display:grid;gap:8px}
.mega-card{display:flex;gap:10px;align-items:center;padding:8px;border-radius:10px}
.mega-card:hover{background:var(--soft)}
.mega-card img{width:38px;height:38px;object-fit:cover;border-radius:8px;background:#eef2f8}
.mega-card span{min-width:0;display:grid;gap:1px}
.mega-card b{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mega-card small{color:var(--muted);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mega-menu> .mega-list{grid-template-columns:1fr 1fr}
.mega-footer{display:inline-block;margin-top:14px;color:var(--theme);font-weight:700;font-size:13px}
.header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
.member-link{font-size:14px;color:var(--theme);font-weight:700}
.open-link{padding:9px 15px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px}
.hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
.hamburger span{display:block;width:23px;height:2px;background:var(--ink);margin:4px 0;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(5,18,42,.55);opacity:0;visibility:hidden;transition:.25s;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;z-index:41;transform:translateX(100%);transition:.3s ease;overflow:auto;box-shadow:-15px 0 40px rgba(0,0,0,.16)}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{height:76px;padding:0 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:15px}
.drawer-head>a{margin-left:auto;color:var(--theme);font-weight:700}
.drawer-close{border:0;background:#f0f3f8;border-radius:50%;width:32px;height:32px;line-height:28px;font-size:24px;color:var(--ink);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;font-size:15px;color:var(--ink);cursor:pointer}
.drawer-group{border-bottom:1px solid var(--line)}
.drawer-toggle{position:relative}
.drawer-toggle:after{content:"+";position:absolute;right:4px;font-size:20px;color:var(--muted)}
.drawer-toggle.active{color:var(--theme)}
.drawer-toggle.active:after{content:"−"}
.drawer-submenu{display:none;padding:4px 0 10px 14px}
.drawer-submenu.open{display:block}
.drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}

.tools-page{padding:64px 0 80px}
.tools-heading{text-align:center;max-width:730px;margin:0 auto 42px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.12em}
.eyebrow:before{content:"";width:24px;height:2px;background:var(--theme)}
.tools-heading h1{margin:12px 0 12px;font-size:clamp(32px,5vw,54px);line-height:1.18;letter-spacing:-.04em;color:#10264e}
.tools-heading p{margin:0;color:var(--muted);font-size:16px}
.tools-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px;padding:17px 20px;background:#fff;border:1px solid var(--line);border-radius:14px}
.tools-toolbar strong{font-size:18px}
.tools-toolbar span{font-size:13px;color:var(--muted)}
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tool-card{display:flex;flex-direction:column;min-height:275px;padding:26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(31,55,90,.045);transition:.25s ease}
.tool-card:hover{transform:translateY(-5px);border-color:#b9cbea;box-shadow:var(--shadow)}
.tool-icon{width:58px;height:58px;display:grid;place-items:center;border-radius:15px;background:#e9f0fc;margin-bottom:20px}
.tool-icon img{width:38px;height:38px;object-fit:contain}
.tool-card h2{margin:0 0 8px;font-size:20px;color:#142d59}
.tool-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.tool-card-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;padding-top:22px}
.tool-meta{color:#8a93a4;font-size:12px}
.tool-enter{color:var(--theme);font-size:13px;font-weight:800}
.tool-enter:after{content:" →";transition:.2s}
.tool-card:hover .tool-enter:after{margin-left:4px}
.pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:42px}
.pagination a{min-width:38px;padding:7px 12px;text-align:center;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--muted);font-size:14px}
.pagination a:hover,.pagination a.active{background:var(--theme);border-color:var(--theme);color:#fff}

.footer{background:#0d1c35;color:#c4cede;padding:54px 0 20px}
.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1.3fr;gap:38px}
.footer strong{display:block;color:#fff;font-size:22px;margin-bottom:14px}
.footer h3{margin:0 0 15px;color:#fff;font-size:15px}
.footer p{margin:0;color:#aebbd0;font-size:13px;line-height:1.9}
.footer-grid>div:not(.footer-brand) a{display:block;color:#bac6d8;font-size:13px;padding:4px 0}
.footer-grid a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:18px;color:#93a3ba;font-size:12px}

@media (max-width:1050px){
  .header-inner{gap:14px}
  .logo{min-width:160px}
  .nav-link{padding-left:9px;padding-right:9px;font-size:14px}
}
@media (max-width:820px){
  .container{width:min(100% - 28px,680px)}
  .topbar .container{min-height:34px}
  .topbar .contact{display:none}
  .main-nav{display:none}
  .header-inner{height:68px}
  .header-btns{margin-left:auto}
  .member-link,.open-link{display:none}
  .hamburger{display:block}
  .tools-page{padding:45px 0 60px}
  .tools-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
}
@media (max-width:560px){
  .tools-heading{margin-bottom:30px}
  .tools-heading h1{font-size:35px}
  .tools-toolbar{align-items:flex-start;flex-direction:column;gap:4px}
  .tools-grid{grid-template-columns:1fr;gap:16px}
  .tool-card{min-height:245px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
}