:root{
      --theme:#0B3D91;
      --ink:#152238;
      --muted:#667085;
      --line:#dce3ec;
      --soft:#f4f7fa;
      --orange:#f2763f;
      --white:#fff;
      --shadow:0 18px 48px rgba(20,39,67,.12);
      --radius:8px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(calc(100% - 40px),var(--container));margin:0 auto}
    .topbar{background:#eef2f6;color:#667085;font-size:13px;border-bottom:1px solid #e1e7ef}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .topbar-links{display:flex;gap:20px}
    .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;color:var(--theme);font-weight:800;font-size:19px}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{list-style:none;padding:0;margin:0;display:flex;align-items:stretch;gap:4px}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:6px;height:76px;padding:0 15px;font-size:15px;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:100%;left:50%;transform:translateX(-50%);visibility:hidden;opacity:0;pointer-events:none;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transition:opacity .18s ease,visibility .18s ease;z-index:30}
    .dropdown-panel{width:270px;padding:12px}
    .dropdown-panel a{display:block;padding:10px 12px;border-bottom:1px solid #edf1f5;font-size:14px}
    .dropdown-panel a:last-child{border:0;color:var(--theme);font-weight:700}
    .mega-menu{width:650px;padding:22px;border-radius:0 0 var(--radius) var(--radius)}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{visibility:visible;opacity:1;pointer-events:auto}
    .nav-item>.dropdown-panel:before,.nav-item>.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-18px;height:18px}
    .mega-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:13px;color:var(--theme);font-size:14px;font-weight:800}
    .mega-title a{font-size:12px;color:var(--muted);font-weight:500}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{min-height:78px;padding:12px;background:var(--soft);border:1px solid transparent;border-radius:6px;display:flex;flex-direction:column;gap:4px}
    .mega-card:hover{border-color:#aac1e2;background:#f8fbff}
    .mega-card img{width:25px;height:25px;object-fit:contain}
    .mega-card strong{font-size:13px;line-height:1.4}
    .mega-card small{font-size:11px;color:var(--muted);line-height:1.45}
    .mega-footer{display:block;margin-top:17px;padding-top:13px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-link{font-size:13px;color:var(--theme)}
    .open-account{padding:9px 15px;border-radius:5px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .open-account:hover{background:#082f70}
    .hamburger{display:none;width:42px;height:40px;padding:9px;border:1px solid var(--line);background:#fff;border-radius:5px;cursor:pointer}
    .hamburger span{display:block;width:21px;height:2px;background:var(--ink);margin:4px auto;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{display:none;position:fixed;inset:0;background:rgba(10,26,47,.5);z-index:50}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(380px,88vw);background:#fff;transform:translateX(105%);transition:transform .25s ease;z-index:60;overflow:auto;box-shadow:-15px 0 40px 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);color:var(--theme)}
    .drawer-head strong{margin-right:auto}
    .drawer-head a{font-size:13px;background:var(--theme);color:#fff;padding:7px 12px;border-radius:4px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:15px 0;border:0;border-bottom:1px solid #edf0f4;background:transparent;text-align:left;font-size:15px;color:var(--ink);cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--muted);font-size:20px}
    .drawer-toggle.active{color:var(--theme)}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 0 8px 14px;border-bottom:1px solid #edf0f4}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:80px;background:#142238;color:#d8e0eb}
    .footer .container{padding:54px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px}
    .footer-brand{font-size:20px;color:#fff;font-weight:800;margin-bottom:14px}
    .footer p{margin:7px 0;color:#aebdce;font-size:13px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-grid>a,.footer-grid>div>a,.footer-grid>div>div>a{display:block;color:#b8c5d4;font-size:13px;margin:9px 0}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:42px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:#9eafc1}
    .download-page-main{background:#f6f8fb;padding-bottom:5px}
    .download-hero{padding:74px 0 54px;background:linear-gradient(180deg,#edf3fa 0%,#f6f8fb 100%);text-align:center;border-bottom:1px solid #e1e8f0}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--orange);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:22px;height:2px;background:var(--orange)}
    .download-hero h1{max-width:760px;margin:15px auto 12px;color:var(--ink);font-size:clamp(30px,4vw,52px);line-height:1.18;letter-spacing:0}
    .download-hero p{max-width:650px;margin:0 auto;color:var(--muted);font-size:16px}
    .download-hero-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;gap:8px;min-height:46px;padding:0 20px;border-radius:5px;font-size:14px;font-weight:700}
    .primary-button{background:var(--theme);color:#fff}
    .secondary-button{background:#fff;color:var(--theme);border:1px solid #b9c9df}
    .primary-button:hover{background:#082f70}
    .secondary-button:hover{border-color:var(--theme)}
    .download-section{padding:64px 0 0}
    .section-heading{text-align:center;margin-bottom:27px}
    .section-heading h2{margin:0 0 8px;font-size:28px;line-height:1.25}
    .section-heading p{margin:0;color:var(--muted);font-size:14px}
    .download-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .step-card{position:relative;padding:28px 25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 7px 22px rgba(21,34,56,.05)}
    .step-number{display:flex;align-items:center;justify-content:center;width:38px;height:38px;margin-bottom:18px;border-radius:50%;background:#e8eff9;color:var(--theme);font-weight:800}
    .step-card h3{margin:0 0 9px;font-size:18px}
    .step-card p{margin:0;color:var(--muted);font-size:14px}
    .step-card:not(:last-child):after{content:"";position:absolute;right:-18px;top:46px;width:18px;height:1px;background:#b5c5da}
    .platform-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:stretch;margin-top:32px;padding:30px;background:#142238;color:#fff;border-radius:var(--radius);overflow:hidden}
    .platform-copy{padding:10px}
    .platform-copy h3{margin:0 0 12px;font-size:25px}
    .platform-copy p{margin:0 0 22px;color:#b6c5d7;font-size:14px}
    .platform-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:0;padding:0;list-style:none}
    .platform-list li{padding:12px 14px;border:1px solid rgba(255,255,255,.16);border-radius:5px;color:#e5edf7;font-size:13px}
    .platform-list li:before{content:"✓";margin-right:8px;color:#f18a52}
    .platform-status{display:flex;flex-direction:column;justify-content:center;padding:28px;background:#203553;border:1px solid rgba(255,255,255,.12);border-radius:6px}
    .status-label{font-size:12px;color:#a9bdd5}
    .status-value{margin:6px 0 18px;color:#fff;font-size:25px;font-weight:800}
    .status-line{height:7px;background:#49617e;border-radius:20px;overflow:hidden}
    .status-line span{display:block;width:82%;height:100%;background:var(--orange)}
    .status-note{margin-top:14px;color:#bdcbd9;font-size:12px}
    .download-faq{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:30px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px}
    .faq-item h3{margin:0 0 8px;font-size:16px}
    .faq-item p{margin:0;color:var(--muted);font-size:13px}
    .download-note{margin-top:28px;padding:18px 20px;background:#fff8f3;border-left:3px solid var(--orange);color:#7b5744;font-size:13px}
    @media (max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:block}
      .logo{min-width:0}
      .header-btns{margin-left:auto}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:700px){
      .container{width:min(calc(100% - 28px),var(--container))}
      .topbar .container{align-items:flex-start;padding:8px 0;flex-direction:column;gap:3px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:66px;gap:10px}
      .logo{font-size:16px}
      .logo img{width:32px;height:32px}
      .member-link{display:none}
      .open-account{padding:8px 10px}
      .download-hero{padding:55px 0 42px}
      .download-hero h1{font-size:34px}
      .download-hero p{font-size:14px}
      .download-section{padding-top:45px}
      .download-steps,.download-faq{grid-template-columns:1fr}
      .step-card:not(:last-child):after{display:none}
      .platform-panel{grid-template-columns:1fr;padding:20px}
      .platform-copy{padding:4px}
      .platform-copy h3{font-size:22px}
      .footer{margin-top:55px}
      .footer .container{padding-top:38px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{flex-direction:column;gap:7px;margin-top:28px}
    }