:root{
  --primary:#0B3D91;
  --primary-dark:#082d6b;
  --ink:#14233a;
  --muted:#64748b;
  --line:#dbe5f1;
  --mist:#eef4fb;
  --white:#fff;
  --shadow:0 16px 45px rgba(11,61,145,.10);
  --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#f7faff;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:#082d6b;color:#dceaff;font-size:13px}
.topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between}
.topbar a{color:#fff}
.header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{height:76px;display:flex;align-items:center;gap:30px}
.logo{display:flex;align-items:center;gap:10px;color:var(--primary);font-weight:800;font-size:19px;white-space:nowrap}
.logo img{width:38px;height:38px;object-fit:contain}
.main-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:3px;list-style:none;margin:0;padding:0}
.nav-list>li{position:relative}
.nav-link{display:flex;align-items:center;gap:5px;padding:25px 12px;color:#263b59;font-size:14px;white-space:nowrap}
.nav-link:hover,.nav-link:focus{color:var(--primary)}
.has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg);margin-top:-4px}
.dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translate(-50%,8px);opacity:0;visibility:hidden;pointer-events:none;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);transition:.2s ease;padding:20px;z-index:30}
.dropdown-panel{width:280px}
.mega-menu{width:570px}
.nav-list>li:hover .dropdown-panel,.nav-list>li:focus-within .dropdown-panel,
.nav-list>li:hover .mega-menu,.nav-list>li:focus-within .mega-menu{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0)}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.drop-title,.mega-title{margin:0 0 12px;color:var(--primary);font-size:16px;font-weight:800}
.drop-item{display:block;padding:8px 0;border-bottom:1px solid #edf2f8;font-size:13px}
.drop-item:hover{color:var(--primary)}
.mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.mega-card{display:grid;grid-template-columns:34px 1fr;column-gap:8px;padding:11px;border:1px solid #e5edf7;border-radius:10px;background:#fbfdff}
.mega-card:hover{border-color:#9bb9e8;background:#f1f6fd}
.mega-card img{grid-row:span 3;width:30px;height:30px;object-fit:contain}
.mega-card strong{font-size:13px;color:#1c3457}
.mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.55}
.mega-footer{display:inline-block;margin-top:14px;color:var(--primary);font-size:13px;font-weight:700;margin-right:12px}
.header-btns{display:flex;align-items:center;gap:13px;white-space:nowrap}
.header-btns>span{font-size:13px;color:#50627b}
.open-account{background:var(--primary);color:#fff;border-radius:8px;padding:8px 14px;font-size:13px}
.open-account:hover{background:var(--primary-dark)}
.hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}
.hamburger span{display:block;width:23px;height:2px;background:var(--primary);margin:5px 0;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(5,22,49,.5);opacity:0;visibility:hidden;transition:.2s;z-index:80}
.drawer-overlay.open{opacity:1;visibility:visible}
.mobile-drawer{position:fixed;top:0;right:-390px;width:min(390px,92vw);height:100vh;background:#fff;z-index:90;transition:right .25s ease;box-shadow:-12px 0 35px rgba(0,0,0,.15);overflow:auto}
.mobile-drawer.open{right:0}
.drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);color:var(--primary);font-weight:700}
.drawer-head>a{margin-left:auto;background:var(--primary);color:#fff;padding:5px 12px;border-radius:6px;font-size:13px}
.drawer-close{border:0;background:none;color:#50627b;font-size:28px;line-height:1;cursor:pointer}
.drawer-menu{padding:10px 20px 30px}
.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf2f8;background:none;text-align:left;color:#263b59;cursor:pointer}
.drawer-group{border-bottom:1px solid #edf2f8}
.drawer-toggle:after{content:"＋";float:right;color:var(--primary)}
.drawer-toggle.active:after{content:"－"}
.drawer-submenu{display:none;padding:4px 0 8px 14px}
.drawer-submenu.open{display:block}
.drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}

.tools-page{padding:0 0 76px}
.tools-hero{padding:70px 0 44px;text-align:center;background:linear-gradient(180deg,#edf5ff 0%,#f7faff 100%);border-bottom:1px solid #e3edf8}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.08em}
.eyebrow:before{content:"";width:28px;height:2px;background:var(--primary)}
.tools-hero h1{margin:13px 0 10px;font-size:clamp(30px,5vw,52px);line-height:1.2;color:#102e59}
.tools-hero p{max-width:650px;margin:0 auto;color:var(--muted);font-size:16px}
.tool-filter{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:25px}
.tool-filter span{padding:7px 15px;border:1px solid #c9d9ed;border-radius:30px;background:#fff;color:#45617f;font-size:13px}
.tool-filter span:first-child{border-color:var(--primary);background:var(--primary);color:#fff}
.tools-list-section{padding:48px 0}
.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}
.section-heading h2{margin:0;color:#142f56;font-size:25px}
.section-heading p{margin:0;color:var(--muted);font-size:14px}
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tool-card{position:relative;display:flex;flex-direction:column;min-height:245px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 7px 24px rgba(17,49,91,.05);transition:transform .2s,box-shadow .2s,border-color .2s}
.tool-card:hover{transform:translateY(-5px);border-color:#9cbbe6;box-shadow:var(--shadow)}
.tool-icon{display:flex;align-items:center;justify-content:center;width:54px;height:54px;margin-bottom:18px;border-radius:14px;background:#edf4ff;border:1px solid #d5e4f7}
.tool-icon img{width:34px;height:34px;object-fit:contain}
.tool-card h3{margin:0 0 8px;color:#183b6c;font-size:18px}
.tool-card p{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden;margin:0;color:var(--muted);font-size:14px;line-height:1.75}
.tool-meta{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:18px;color:#91a0b2;font-size:12px}
.tool-link{color:var(--primary);font-weight:700}
.tool-link:after{content:" →"}
.tool-note{margin-top:28px;padding:20px 24px;border-left:4px solid var(--primary);border-radius:10px;background:#eef5ff;color:#526982;font-size:14px}

.footer{background:#0b1f3c;color:#b8c7dc;padding:48px 0 20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.footer h3{margin:0 0 12px;color:#fff;font-size:20px}
.footer h4{margin:0 0 14px;color:#fff;font-size:15px}
.footer p{margin:6px 0;font-size:13px;line-height:1.9}
.footer-grid a{display:block;margin:7px 0;color:#b8c7dc;font-size:13px}
.footer-grid a:hover{color:#fff}
.footer-bottom{margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);font-size:12px;color:#91a7c4}

@media(max-width:1050px){
  .main-nav{display:none}
  .header-btns{margin-left:auto}
  .hamburger{display:block}
}
@media(max-width:760px){
  .container{width:min(100% - 28px,1180px)}
  .topbar .container{min-height:42px;align-items:flex-start;flex-direction:column;justify-content:center;line-height:1.5}
  .topbar .contact{font-size:12px}
  .header-inner{height:66px;gap:10px}
  .header-btns>span{display:none}
  .open-account{padding:7px 10px}
  .tools-hero{padding:48px 0 34px}
  .tools-hero h1{font-size:34px}
  .tools-hero p{font-size:14px}
  .section-heading{display:block}
  .section-heading p{margin-top:6px}
  .tools-grid{grid-template-columns:1fr}
  .tool-card{min-height:220px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
}
@media(max-width:460px){
  .footer-grid{grid-template-columns:1fr}
  .mega-menu{width:calc(100vw - 30px)}
}