:root{
  --theme:#0B3D91;
  --ink:#13233f;
  --muted:#66758d;
  --line:#dce5f0;
  --soft:#f3f7fc;
  --white:#fff;
  --shadow:0 18px 50px rgba(22,55,102,.12);
}
*{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}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.topbar{height:38px;background:#0b2149;color:#cddcf2;font-size:13px}
.topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between}
.topbar a{color:#fff}
.header{position:relative;z-index:30;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;color:var(--theme);font-size:19px;font-weight:800}
.logo img{width:36px;height:36px;object-fit:contain}
.main-nav{flex:1}
.nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-list>li{position:relative}
.nav-link{display:block;padding:25px 13px;color:#293b58;font-size:14px;white-space:nowrap}
.nav-link:hover,.nav-link:focus{color:var(--theme)}
.has-arrow:after{content:"⌄";margin-left:6px;color:#8b9ab0}
.dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(8px);width:320px;padding:20px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 14px 14px;opacity:0;visibility:hidden;transition:.2s;z-index:40}
.mega-menu{width:560px}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.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;transform:translateX(-50%) translateY(0)}
.drop-title,.mega-title{margin:0 0 12px;color:var(--theme);font-size:16px;font-weight:800}
.drop-item{display:block;padding:8px 0;border-bottom:1px solid #edf2f8;font-size:14px}
.drop-item:hover,.mega-card:hover{color:var(--theme)}
.mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.mega-card{display:grid;grid-template-columns:32px 1fr;gap:2px 8px;padding:11px;border:1px solid #e3eaf3;border-radius:10px;font-size:13px}
.mega-card img{grid-row:span 2;width:30px;height:30px;object-fit:contain}
.mega-card strong{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mega-card small{grid-column:2;color:var(--muted);font-size:11px;line-height:1.5}
.mega-footer{display:inline-block;margin-top:14px;margin-right:12px;color:var(--theme);font-size:13px}
.header-btns{display:flex;align-items:center;gap:15px;white-space:nowrap;font-size:13px}
.open-account{padding:8px 15px;border-radius:7px;background:var(--theme);color:#fff}
.hamburger{display:none;width:40px;height:38px;padding:8px;border:1px solid var(--line);border-radius:7px;background:#fff;cursor:pointer}
.hamburger span{display:block;height:2px;margin:4px 0;background:var(--theme);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(5,22,48,.52);opacity:0;visibility:hidden;transition:.25s;z-index:80}
.drawer-overlay.open{opacity:1;visibility:visible}
.mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(390px,88vw);background:#fff;transform:translateX(100%);transition:.3s;z-index:90;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;padding:5px 11px;background:var(--theme);color:#fff;border-radius:5px;font-size:13px}
.drawer-close{border:0;background:transparent;color:#73829a;font-size:27px;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 #edf1f6;background:transparent;text-align:left;color:var(--ink);cursor:pointer}
.drawer-toggle:after{content:"＋";float:right;color:#91a0b5}
.drawer-toggle.active{color:var(--theme)}
.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}
.download-page-main{padding:64px 0 82px;background:linear-gradient(180deg,#f1f6fc 0,#fff 46%,#f7faff 100%)}
.download-hero{text-align:center;max-width:800px;margin:0 auto 38px}
.download-kicker{display:inline-flex;align-items:center;gap:8px;padding:5px 13px;border:1px solid #c9d8ea;border-radius:999px;background:#fff;color:var(--theme);font-size:13px;font-weight:700}
.download-kicker:before{content:"";width:7px;height:7px;border-radius:50%;background:#3d9bff}
.download-hero h1{margin:18px 0 10px;font-size:clamp(30px,5vw,52px);line-height:1.2;letter-spacing:-1px;color:#102c59}
.download-hero p{margin:0 auto;color:var(--muted);font-size:16px;max-width:650px}
.download-actions{display:flex;justify-content:center;gap:12px;margin-top:24px;flex-wrap:wrap}
.primary-btn,.ghost-btn{display:inline-flex;align-items:center;justify-content:center;min-width:150px;padding:11px 20px;border-radius:8px;font-size:14px;font-weight:700}
.primary-btn{background:var(--theme);color:#fff;box-shadow:0 8px 20px rgba(11,61,145,.2)}
.ghost-btn{border:1px solid #c8d5e6;background:#fff;color:var(--theme)}
.download-panel{position:relative;max-width:960px;margin:0 auto 54px;padding:30px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
.download-panel:before{content:"";position:absolute;left:28px;right:28px;top:0;height:3px;background:var(--theme);border-radius:3px}
.panel-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}
.panel-head h2{margin:0;font-size:23px;color:#17355f}
.panel-head p{margin:0;color:var(--muted);font-size:13px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{padding:22px 19px;border:1px solid #e2eaf4;border-radius:13px;background:#fbfdff}
.step-no{display:flex;align-items:center;justify-content:center;width:35px;height:35px;margin-bottom:13px;border-radius:10px;background:#e7effa;color:var(--theme);font-weight:800}
.step h3{margin:0 0 6px;font-size:17px}
.step p{margin:0;color:var(--muted);font-size:13px}
.download-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;max-width:960px;margin:0 auto}
.platform-card,.notice-card{padding:27px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 10px 30px rgba(34,66,110,.07)}
.platform-card h2,.notice-card h2{margin:0 0 18px;font-size:21px;color:#17355f}
.platform-list{display:grid;gap:12px}
.platform-item{display:flex;align-items:center;gap:13px;padding:14px;border:1px solid #e4ebf4;border-radius:11px}
.platform-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:#eaf1fb;color:var(--theme);font-size:18px;font-weight:800}
.platform-item strong{display:block;font-size:14px}
.platform-item small{display:block;color:var(--muted);font-size:12px}
.platform-item a{margin-left:auto;color:var(--theme);font-size:13px;font-weight:700}
.notice-card{background:#0e2d61;color:#fff;border-color:#0e2d61}
.notice-card h2{color:#fff}
.notice-card p{color:#d5e2f5;font-size:14px}
.notice-card ul{margin:16px 0 0;padding-left:20px;color:#d5e2f5;font-size:13px}
.notice-card li{margin:8px 0}
.faq-section{max-width:960px;margin:55px auto 0}
.faq-section h2{text-align:center;color:#17355f;font-size:25px;margin:0 0 22px}
.faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.faq-item{padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:12px}
.faq-item h3{margin:0 0 6px;font-size:15px;color:#203c67}
.faq-item p{margin:0;color:var(--muted);font-size:13px}
.footer{background:#091d3d;color:#c1d0e4;padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:30px;padding-bottom:34px}
.footer h3,.footer h4{margin:0 0 15px;color:#fff}
.footer h3{font-size:20px}
.footer h4{font-size:14px}
.footer p{margin:7px 0;font-size:13px;line-height:1.8}
.footer-grid a{display:block;margin:7px 0;color:#c1d0e4;font-size:13px}
.footer-grid a:hover{color:#fff}
.footer-bottom{padding:18px 0;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:#9fb0c7}
@media(max-width:980px){
  .main-nav{display:none}
  .header-btns>span{display:none}
  .hamburger{display:block}
  .header-inner{height:68px}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:700px){
  .container{width:min(100% - 28px,1180px)}
  .topbar{height:auto;padding:7px 0}
  .topbar .container{display:block;text-align:center;font-size:12px}
  .topbar .contact{display:block}
  .download-page-main{padding:42px 0 58px}
  .download-hero h1{font-size:34px}
  .download-panel{padding:23px 16px}
  .panel-head{display:block}
  .panel-head p{margin-top:5px}
  .steps,.download-grid,.faq-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:22px}
}
@media(max-width:430px){
  .footer-grid{grid-template-columns:1fr}
  .header-btns{gap:8px}
  .open-account{padding:7px 10px}
}