:root{
      --theme:#0B3D91;
      --ink:#122033;
      --muted:#667085;
      --line:#e5eaf1;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 18px 55px rgba(18,32,51,.09);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{height:38px;background:#f5f7fa;color:#667085;font-size:13px;border-bottom:1px solid #e8edf3}
    .topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between}
    .topbar-links{display:flex;gap:22px}
    .topbar a:hover{color:var(--theme)}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-size:18px;font-weight:800;color:#13233b}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;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;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{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:280px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s ease}
    .mega-menu{width:650px}
    .nav-item:hover>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.dropdown-panel,.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}
    .mega-title{margin:0 0 13px;color:var(--theme);font-size:13px;font-weight:700}
    .dropdown-panel>a:not(.mega-footer){display:block;padding:9px 0;border-bottom:1px solid #eef1f5;font-size:14px}
    .dropdown-panel>a:not(.mega-footer):hover,.mega-card:hover strong{color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;min-height:104px;padding:12px;border:1px solid var(--line);border-radius:11px;background:#fbfcfe}
    .mega-card img{width:28px;height:28px;object-fit:contain;margin-bottom:6px}
    .mega-card strong{display:block;font-size:13px;line-height:1.4}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.55;margin-top:3px}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--theme);font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-btn{font-size:13px;color:var(--theme);white-space:nowrap}
    .open-account{display:inline-flex;align-items:center;justify-content:center;padding:9px 16px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .open-account:hover{background:#082d6b}
    .hamburger{display:none;width:40px;height:40px;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
    .hamburger.active span:first-child{transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-7px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;background:rgba(10,20,35,.45);opacity:0;visibility:hidden;transition:.25s;z-index:80}
    .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:90;transform:translateX(105%);transition:.3s ease;overflow:auto;box-shadow:-15px 0 50px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-size:14px}
    .drawer-close{border:0;background:transparent;font-size:30px;line-height:1;cursor:pointer;color:#667085}
    .drawer-menu{padding:10px 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;color:var(--ink);font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px;line-height:1}
    .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}
    .footer{margin-top:80px;background:#111c2d;color:#d5dce7;padding:58px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
    .footer-brand strong{display:block;color:#fff;font-size:20px;margin-bottom:12px}
    .footer p{margin:7px 0;color:#aeb9c8;font-size:13px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:8px 0;color:#b8c3d1;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);margin-top:42px;padding-top:18px;color:#8d9aab;font-size:12px}
    .download-page-main{background:linear-gradient(180deg,#f7f9fc 0,#fff 520px);padding:72px 0 0}
    .download-hero{text-align:center;max-width:820px;margin:0 auto 50px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:700;letter-spacing:.08em}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--theme)}
    .download-hero h1{margin:14px 0 12px;font-size:clamp(32px,5vw,58px);line-height:1.18;letter-spacing:-.04em}
    .download-hero p{max-width:650px;margin:0 auto;color:var(--muted);font-size:16px}
    .download-actions{display:flex;justify-content:center;gap:12px;margin-top:28px;flex-wrap:wrap}
    .primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;min-width:138px;padding:12px 21px;border-radius:9px;font-size:14px;font-weight:700}
    .primary-button{background:var(--theme);color:#fff}
    .secondary-button{border:1px solid #cdd7e5;color:var(--theme);background:#fff}
    .primary-button:hover{background:#082d6b}
    .secondary-button:hover{border-color:var(--theme);background:#f2f6fc}
    .download-overview{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:64px}
    .overview-card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .overview-card .number{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;background:#eaf1fc;color:var(--theme);font-weight:800;margin-bottom:14px}
    .overview-card h2{font-size:18px;margin:0 0 8px}
    .overview-card p{margin:0;color:var(--muted);font-size:14px}
    .download-section{margin-top:50px}
    .section-heading{text-align:center;margin-bottom:26px}
    .section-heading h2{margin:0 0 8px;font-size:30px}
    .section-heading p{margin:0;color:var(--muted);font-size:14px}
    .platform-panel{display:grid;grid-template-columns:1.1fr 1fr;gap:26px;align-items:stretch;padding:30px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}
    .platform-copy{padding:13px}
    .platform-copy h3{margin:0 0 10px;font-size:24px}
    .platform-copy p{color:var(--muted);font-size:14px}
    .platform-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:22px 0}
    .platform-list span{padding:10px 12px;background:var(--soft);border-radius:8px;font-size:13px}
    .platform-list span:before{content:"✓";color:var(--theme);font-weight:bold;margin-right:7px}
    .platform-box{display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:270px;padding:30px;border-radius:16px;background:linear-gradient(145deg,#102e5f,#0B3D91);color:#fff;text-align:center}
    .platform-box .device-icon{width:58px;height:58px;border:2px solid rgba(255,255,255,.85);border-radius:13px;margin-bottom:15px;position:relative}
    .platform-box .device-icon:after{content:"";position:absolute;left:12px;right:12px;bottom:8px;height:2px;background:#fff}
    .platform-box h3{margin:0 0 7px;font-size:20px}
    .platform-box p{margin:0;color:#d7e5ff;font-size:13px}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .step{padding:24px;background:#f7f9fc;border-radius:15px;border:1px solid var(--line)}
    .step b{display:block;color:var(--theme);font-size:13px;margin-bottom:8px}
    .step h3{margin:0 0 7px;font-size:17px}
    .step p{margin:0;color:var(--muted);font-size:13px}
    .faq-list{max-width:850px;margin:0 auto}
    .faq-item{padding:18px 0;border-bottom:1px solid var(--line)}
    .faq-item h3{margin:0 0 6px;font-size:16px}
    .faq-item p{margin:0;color:var(--muted);font-size:14px}
    .download-note{margin-top:52px;padding:22px 26px;border-left:4px solid var(--theme);background:#f2f6fc;color:#596779;font-size:13px}
    @media(max-width:1000px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .mega-menu{width:min(650px,calc(100vw - 40px))}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar{height:auto;padding:8px 0}
      .topbar .container{align-items:flex-start;gap:5px;flex-direction:column}
      .topbar-links{gap:14px;flex-wrap:wrap}
      .header-inner{min-height:66px;gap:10px}
      .logo{min-width:0;font-size:16px}
      .member-btn{display:none}
      .open-account{padding:8px 11px;font-size:12px}
      .download-page-main{padding-top:48px}
      .download-hero h1{font-size:36px}
      .download-hero p{font-size:14px}
      .download-overview,.steps{grid-template-columns:1fr}
      .platform-panel{grid-template-columns:1fr;padding:17px}
      .platform-box{min-height:210px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{flex-direction:column;gap:7px}
    }
    @media(max-width:430px){
      .mega-grid{grid-template-columns:1fr 1fr}
      .platform-list{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
    }