:root{--theme:#0B3D91;--ink:#172033;--muted:#667085;--line:#e6eaf0;--paper:#f6f8fb;--white:#fff;--green:#1f8a62}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;line-height:1.6}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{height:38px;background:#10213d;color:#dfe8f7;font-size:13px}
    .topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between}
    .topbar a{color:#fff}
    .header{height:78px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
    .header-inner{height:100%;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--theme);white-space:nowrap}
    .logo img{width:34px;height:34px;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-list>li{position:relative}
    .nav-link{display:block;padding:27px 13px;color:#263247;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:5px;color:#8793a5}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translate(-50%,8px);width:300px;padding:18px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 45px #10213d1c;border-radius:0 0 12px 12px;opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:650px}
    .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:translate(-50%,0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-10px;height:10px}
    .drop-title,.mega-title{font-size:13px;font-weight:800;color:var(--theme);margin:0 0 10px}
    .drop-item{display:block;padding:8px 4px;border-bottom:1px solid #f0f2f5;font-size:13px}
    .drop-item:hover{color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}
    .mega-card{display:flex;gap:9px;padding:9px;border:1px solid #edf0f4;border-radius:8px;background:#fbfcfe;font-size:11px}
    .mega-card img{width:34px;height:34px;object-fit:contain;border-radius:6px}
    .mega-card strong,.mega-card span span{display:block}
    .mega-card strong{font-size:12px;margin-bottom:2px}
    .mega-card span span{color:var(--muted);line-height:1.45}
    .mega-footer{display:block;margin-top:13px;padding-top:11px;border-top:1px solid var(--line);font-size:13px;color:var(--theme);font-weight:700}
    .header-btns{display:flex;align-items:center;gap:9px;white-space:nowrap}
    .member-btn,.open-btn{padding:8px 13px;border-radius:6px;font-size:13px}
    .member-btn{color:var(--theme);border:1px solid #cbd8ec}
    .open-btn{color:#fff;background:var(--theme)}
    .hamburger{display:none;border:0;background:none;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:#263247;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{display:none;position:fixed;inset:0;background:#08152b99;z-index:50}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:-360px;width:min(360px,88vw);height:100vh;background:#fff;z-index:60;transition:.25s;overflow:auto;box-shadow:-10px 0 30px #0002}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:18px;border-bottom:1px solid var(--line);font-weight:700;color:var(--theme)}
    .drawer-head>a{margin-left:auto;background:var(--theme);color:#fff;padding:5px 10px;border-radius:5px;font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;color:#536074;cursor:pointer}
    .drawer-menu{padding:8px 18px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf0f4;background:none;text-align:left;font-size:15px;color:var(--ink)}
    .drawer-toggle{cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#8b96a6}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:3px 0 7px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}
    .footer{background:#101d33;color:#ccd5e4;margin-top:70px;padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
    .footer-brand{font-weight:800;color:#fff;font-size:20px;margin-bottom:10px}
    .footer p{margin:6px 0;color:#aebbd0;font-size:13px}
    .footer h3{font-size:14px;color:#fff;margin:0 0 12px}
    .footer-grid>div>a{display:block;color:#aebbd0;font-size:13px;padding:3px 0}
    .footer-grid>div>a:hover{color:#fff}
    .footer-social{margin-top:15px}
    .footer-bottom{border-top:1px solid #ffffff1c;margin-top:30px;padding-top:18px;color:#8f9eb5;font-size:12px}
    .download-page-main{padding:58px 0 20px}
    .download-hero{text-align:center;max-width:800px;margin:0 auto 38px}
    .eyebrow{display:inline-block;color:var(--theme);background:#e8effb;border-radius:30px;padding:5px 13px;font-size:13px;font-weight:700}
    .download-hero h1{font-size:clamp(30px,5vw,52px);line-height:1.18;margin:16px 0 12px;color:#122544}
    .download-hero p{color:var(--muted);margin:0;font-size:16px}
    .download-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .download-panel,.faq-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;box-shadow:0 12px 35px #14274d0a}
    .download-panel h2,.faq-panel h2{margin:0 0 8px;font-size:23px;color:#172b4d}
    .panel-intro{color:var(--muted);font-size:14px;margin:0 0 20px}
    .download-options{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}
    .download-option{display:flex;gap:12px;align-items:flex-start;border:1px solid #e4eaf2;border-radius:12px;padding:15px;transition:.2s}
    .download-option:hover{border-color:#aac0e4;transform:translateY(-2px)}
    .download-icon{width:42px;height:42px;display:grid;place-items:center;background:#eaf1fc;border-radius:10px;color:var(--theme);font-weight:800;font-size:18px}
    .download-option h3{font-size:15px;margin:0 0 3px}
    .download-option p{font-size:12px;color:var(--muted);margin:0}
    .download-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .primary-btn,.secondary-btn{display:inline-block;padding:11px 18px;border-radius:7px;font-size:14px;font-weight:700}
    .primary-btn{background:var(--theme);color:#fff}
    .secondary-btn{border:1px solid #c9d6e9;color:var(--theme);background:#fff}
    .steps{display:grid;gap:14px;margin-top:22px}
    .step{display:flex;gap:13px;align-items:flex-start}
    .step-num{flex:0 0 29px;height:29px;display:grid;place-items:center;border-radius:50%;background:var(--theme);color:#fff;font-weight:700;font-size:13px}
    .step h3{font-size:15px;margin:1px 0 3px}
    .step p{font-size:13px;color:var(--muted);margin:0}
    .notice{margin-top:23px;padding:13px 15px;background:#f3f7fd;border-left:3px solid var(--theme);font-size:13px;color:#52627a}
    .faq-list{display:grid;gap:10px;margin-top:20px}
    .faq-list details{border:1px solid #e6eaf0;border-radius:9px;padding:13px 15px;background:#fbfcfe}
    .faq-list summary{cursor:pointer;font-size:14px;font-weight:700;color:#263753}
    .faq-list p{font-size:13px;color:var(--muted);margin:10px 0 0}
    .download-bottom{margin-top:24px;text-align:center;background:#eaf1fc;border-radius:15px;padding:25px}
    .download-bottom h2{margin:0 0 7px;color:#17315d;font-size:22px}
    .download-bottom p{margin:0 0 15px;color:#5b6b82;font-size:14px}
    @media(max-width:1050px){.nav-link{padding-left:8px;padding-right:8px}.header-inner{gap:12px}.mega-menu{width:560px}}
    @media(max-width:820px){
      .topbar .contact{display:none}.main-nav{display:none}.hamburger{display:block}.header-btns .member-btn{display:none}
      .download-layout{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:560px){
      .container{width:min(100% - 28px,1180px)}.header{height:68px}.logo{font-size:16px}.logo img{width:30px;height:30px}
      .open-btn{padding:7px 10px}.download-page-main{padding-top:38px}.download-panel,.faq-panel{padding:21px}
      .download-options{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:25px}.footer{margin-top:45px;padding-top:35px}
      .download-hero h1{font-size:34px}
    }