:root{
      --primary:#0B3D91;
      --primary-dark:#082b68;
      --ink:#172033;
      --muted:#687386;
      --line:#e4e9f1;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(17,35,66,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC",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{background:#101827;color:#dce5f4;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:20px}
    .topbar a{color:#dce5f4;transition:.2s}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:inline-flex;align-items:center;gap:10px;min-width:max-content;font-size:19px;font-weight:800;color:var(--primary)}
    .logo img{width:36px;height:36px;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:15px;font-weight:650;white-space:nowrap}
    .nav-link:hover{color:var(--primary)}
    .has-arrow:after{content:"⌄";font-size:12px;color:#8b96a8}
    .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 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;pointer-events:none}
    .mega-menu{width:530px}
    .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);pointer-events:auto}
    .mega-title{margin:0 0 12px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.06em}
    .dropdown-list{display:grid;gap:7px}
    .dropdown-list a{display:block;padding:7px 9px;border-radius:8px;font-size:14px}
    .dropdown-list a:hover{background:var(--soft);color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .mega-card{display:flex;gap:10px;min-width:0;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fff}
    .mega-card:hover{border-color:#a7bde4;background:#f8fbff}
    .mega-card img{width:36px;height:36px;object-fit:contain;border-radius:7px;background:var(--soft);flex:0 0 36px}
    .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:13px}
    .mega-card small{color:var(--muted);font-size:11px;line-height:1.5}
    .mega-footer{display:block;margin-top:15px;padding-top:13px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:12px}
    .member-link{font-size:14px;color:var(--primary);font-weight:700;white-space:nowrap}
    .open-account{padding:9px 16px;background:var(--primary);color:#fff;border-radius:9px;font-size:14px;font-weight:700;white-space:nowrap}
    .open-account:hover{background:var(--primary-dark)}
    .hamburger{display:none;border:0;background:transparent;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:var(--ink);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}
    .mobile-drawer{display:none}
    .download-page-main{background:linear-gradient(180deg,#f6f8fc 0,#fff 60%);padding-bottom:90px}
    .download-hero{padding:86px 0 54px;text-align:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:99px;background:#eaf1fc;color:var(--primary);font-size:13px;font-weight:800}
    .eyebrow:before{content:"";width:7px;height:7px;background:var(--primary);border-radius:50%}
    .download-hero h1{max-width:760px;margin:18px auto 12px;font-size:clamp(34px,5vw,58px);line-height:1.16;letter-spacing:-.04em}
    .download-hero p{max-width:680px;margin:0 auto;color:var(--muted);font-size:17px}
    .download-wrap{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:28px;align-items:stretch}
    .download-card,.download-side,.faq-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .download-card{padding:34px}
    .download-card h2,.download-side h2,.faq-card h2{margin:0 0 10px;font-size:25px;line-height:1.3}
    .section-intro{margin:0 0 26px;color:var(--muted)}
    .download-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}
    .download-option{display:flex;align-items:center;gap:14px;padding:18px;border:1px solid var(--line);border-radius:14px;transition:.2s}
    .download-option:hover{border-color:#9db6e2;transform:translateY(-2px)}
    .download-icon{width:44px;height:44px;display:grid;place-items:center;background:#edf3fc;color:var(--primary);border-radius:12px;font-weight:900;font-size:20px}
    .download-option strong{display:block;font-size:16px}
    .download-option span{display:block;color:var(--muted);font-size:13px}
    .download-button{display:inline-flex;align-items:center;justify-content:center;margin-top:27px;padding:13px 22px;border-radius:10px;background:var(--primary);color:#fff;font-weight:750}
    .download-button:hover{background:var(--primary-dark)}
    .download-side{padding:28px;background:linear-gradient(145deg,#0B3D91,#071d46);color:#fff}
    .download-side h2{color:#fff}
    .download-side p{color:#ccdafa}
    .step-list{display:grid;gap:19px;margin:25px 0 0;padding:0;list-style:none}
    .step-list li{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start}
    .step-number{width:34px;height:34px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.35);border-radius:50%;font-weight:800}
    .step-list strong{display:block;margin-bottom:2px}
    .step-list span{display:block;color:#c8d7f2;font-size:13px}
    .faq-card{margin-top:28px;padding:30px}
    .faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .faq-item{padding:18px;background:var(--soft);border-radius:12px}
    .faq-item h3{margin:0 0 7px;font-size:16px}
    .faq-item p{margin:0;color:var(--muted);font-size:14px}
    .footer{padding:58px 0 22px;background:#101827;color:#c8d2e2}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
    .footer .logo{color:#fff}
    .footer .logo img{background:#fff;border-radius:8px}
    .footer-brand p{max-width:300px;color:#9eacc2;font-size:14px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:7px;list-style:none;margin:0;padding:0;font-size:14px}
    .footer a:hover{color:#fff}
    .footer p{margin:6px 0;color:#9eacc2;font-size:14px}
    .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);color:#8998ae;font-size:12px}
    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .download-wrap{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:68px}
      .member-link{display:none}
      .open-account{padding:8px 12px;font-size:13px}
      .mobile-drawer{display:block;position:fixed;z-index:50;top:0;right:0;width:min(88vw,370px);height:100vh;padding:20px;background:#fff;box-shadow:-15px 0 40px rgba(0,0,0,.18);transform:translateX(105%);transition:.25s;overflow:auto}
      .mobile-drawer.open{transform:translateX(0)}
      .drawer-overlay{position:fixed;z-index:40;inset:0;background:rgba(8,18,35,.55);opacity:0;visibility:hidden;transition:.25s}
      .drawer-overlay.open{display:block;opacity:1;visibility:visible}
      .drawer-head{display:flex;align-items:center;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--line);font-weight:800;color:var(--primary)}
      .drawer-head a{margin-left:auto;padding:6px 11px;background:var(--primary);color:#fff;border-radius:7px;font-size:13px}
      .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer;color:var(--muted)}
      .drawer-menu{padding-top:15px}
      .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
      .drawer-toggle:after{content:"＋";float:right;color:var(--muted)}
      .drawer-toggle.active:after{content:"－"}
      .drawer-submenu{display:none;padding:5px 0 8px 14px}
      .drawer-submenu.open{display:block}
      .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
      .download-hero{padding:55px 0 35px}
      .download-hero p{font-size:15px}
      .download-card,.download-side,.faq-card{padding:23px}
      .download-options,.faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{display:grid;gap:8px}
    }