:root{
      --primary:#0B3D91;
      --primary-dark:#082d6b;
      --ink:#172033;
      --muted:#657087;
      --line:#dfe6f0;
      --surface:#f5f8fc;
      --white:#fff;
      --shadow:0 18px 50px rgba(16,47,93,.10);
      --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%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#092d69;color:#dce8ff;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid #edf1f7}
    .header-inner{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:19px;font-weight:800;color:var(--primary)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:3px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;height:78px;padding:0 13px;font-size:14px;font-weight:600;color:#26344c;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--primary)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 3px 8px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%) translateY(8px);width:320px;padding:22px;background:#fff;border:1px solid #e6ebf3;border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:580px}
    .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{margin:0 0 13px;color:var(--primary);font-size:14px;font-weight:800}
    .panel-list{display:grid;gap:7px}
    .panel-list a{padding:7px 0;border-bottom:1px solid #eef2f7;color:#46546b;font-size:13px}
    .panel-list a:hover,.footer-links a:hover{color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
    .mega-card{display:flex;gap:10px;min-width:0;padding:10px;border:1px solid #edf1f6;border-radius:10px;background:#fbfcfe}
    .mega-card:hover{border-color:#a9c4ed}
    .mega-card img{width:34px;height:34px;object-fit:contain;flex:none}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:12px}.mega-card small{font-size:10px;color:var(--muted)}
    .mega-footer{display:block;margin-top:16px;padding-top:13px;border-top:1px solid #edf1f6;color:var(--primary);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-link{color:var(--primary);font-size:13px;font-weight:700}
    .open-link{padding:8px 16px;border-radius:9px;background:var(--primary);color:#fff;font-size:13px;font-weight:700}
    .open-link:hover{background:var(--primary-dark)}
    .hamburger{display:none;width:40px;height:38px;border:1px solid var(--line);border-radius:9px;background:#fff;padding:8px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--primary);transition:.2s}
    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(8,24,52,.48);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;overflow:auto;transition:right .25s;box-shadow:-12px 0 40px rgba(0,0,0,.16)}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:700;color:var(--primary)}
    .drawer-head>a{margin-left:auto;color:var(--primary);font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;color:#657087;cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf1f5;background:none;text-align:left;color:#26344c;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--primary);font-size:20px;font-weight:400}
    .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:13px}
    .footer{margin-top:80px;padding:54px 0 20px;background:#101d35;color:#c5d0e2}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
    .footer-brand{color:#fff;font-size:20px;font-weight:800;margin-bottom:12px}
    .footer p{margin:7px 0;color:#9eabc0;font-size:13px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:8px;font-size:13px;color:#aebbd0}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#8291a9}
    .download-page-main{background:linear-gradient(180deg,#f4f8fe 0,#fff 480px);padding:70px 0 10px}
    .download-hero{text-align:center;max-width:760px;margin:0 auto 42px}
    .eyebrow{display:inline-flex;padding:6px 13px;border-radius:999px;background:#e4efff;color:var(--primary);font-size:12px;font-weight:800;letter-spacing:.08em}
    .download-hero h1{margin:16px 0 12px;font-size:clamp(30px,5vw,52px);line-height:1.18;color:#102652}
    .download-hero p{margin:0 auto;color:var(--muted);font-size:16px}
    .download-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:25px}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;font-size:14px;font-weight:800}
    .primary-btn{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(11,61,145,.2)}
    .secondary-btn{border:1px solid #cbd8eb;color:var(--primary);background:#fff}
    .primary-btn:hover{background:var(--primary-dark)}
    .download-panel{display:grid;grid-template-columns:1.05fr 1fr;gap:24px;align-items:stretch}
    .download-card,.step-card,.faq-card{background:#fff;border:1px solid #e2eaf4;border-radius:var(--radius);box-shadow:var(--shadow)}
    .download-card{padding:30px}
    .download-card h2,.steps h2,.faq-section h2{margin:0 0 12px;color:#152c58;font-size:24px}
    .download-card>p{color:var(--muted);margin-top:0}
    .feature-list{display:grid;gap:12px;margin:22px 0 0;padding:0;list-style:none}
    .feature-list li{display:flex;gap:11px;align-items:flex-start;color:#45536b;font-size:14px}
    .feature-list li:before{content:"✓";display:grid;place-items:center;flex:none;width:23px;height:23px;border-radius:50%;background:#e6f0ff;color:var(--primary);font-weight:800}
    .download-visual{min-height:310px;padding:28px;border-radius:var(--radius);background:linear-gradient(145deg,#0b3d91,#2c6bc5);color:#fff;position:relative;overflow:hidden}
    .download-visual:before,.download-visual:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.2);border-radius:50%}
    .download-visual:before{width:330px;height:330px;right:-100px;top:-130px}
    .download-visual:after{width:230px;height:230px;left:-100px;bottom:-110px}
    .visual-content{position:relative;z-index:1}
    .visual-content .small-label{font-size:12px;opacity:.78}
    .visual-content h3{font-size:30px;line-height:1.25;margin:18px 0 12px}
    .visual-content p{color:#dce9ff;font-size:14px;max-width:360px}
    .platform-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
    .platform-badges span{padding:7px 11px;border:1px solid rgba(255,255,255,.3);border-radius:8px;font-size:12px}
    .steps,.faq-section{margin-top:60px}
    .section-intro{margin:0 0 24px;color:var(--muted)}
    .step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .step-card{padding:24px}
    .step-number{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:#e7f0ff;color:var(--primary);font-size:18px;font-weight:800}
    .step-card h3{margin:18px 0 7px;font-size:17px}
    .step-card p{margin:0;color:var(--muted);font-size:14px}
    .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .faq-card{padding:22px}
    .faq-card h3{margin:0 0 8px;font-size:16px;color:#1b376b}
    .faq-card p{margin:0;color:var(--muted);font-size:14px}
    @media(max-width:1050px){
      .main-nav{display:none}.hamburger{display:block}.header-inner{justify-content:space-between}.header-btns{margin-left:auto}
      .download-panel{grid-template-columns:1fr}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{align-items:flex-start;flex-direction:column;gap:0;padding:7px 0}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .member-link{display:none}
      .download-page-main{padding-top:45px}
      .download-card,.download-visual{padding:23px}
      .step-grid,.faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px 18px}
      .footer-bottom{flex-direction:column;gap:7px}
    }