:root{
      --theme:#0B3D91;
      --cyan:#0891B2;
      --ink:#172033;
      --muted:#64748B;
      --line:#D8E2EC;
      --pale:#F3FAFC;
      --white:#FFFFFF;
      --shadow:0 16px 40px rgba(19,45,77,.1);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:Arial,"Noto Sans TC","Microsoft JhengHei",sans-serif;line-height:1.6}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#142033;color:#DCE9F1;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:20px}
    .topbar a:hover{color:#7ED9E7}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:max-content;font-weight:800;color:var(--theme)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .logo span{font-size:19px}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:3px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:7px;height:76px;padding:0 13px;color:#26354A;font-size:14px;font-weight:700;white-space:nowrap}
    .nav-link:hover,.nav-link:focus-visible{color:var(--cyan)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);width:310px;padding:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:560px}
    .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}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-panel>a:not(.mega-footer){display:block;padding:9px 4px;border-bottom:1px solid #EDF2F6;font-size:14px}
    .dropdown-panel>a:hover,.mega-card:hover{color:var(--cyan)}
    .mega-title{margin:0 0 11px;color:var(--theme);font-size:13px;font-weight:800}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
    .mega-card{display:block;min-height:66px;padding:10px;border:1px solid #E1EAF0;background:#FAFCFD}
    .mega-card img{width:23px;height:23px;object-fit:contain;margin-bottom:4px}
    .mega-card strong,.mega-card small{display:block}
    .mega-card strong{font-size:13px;line-height:1.35}
    .mega-card small{margin-top:3px;color:var(--muted);font-size:11px;line-height:1.4}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:8px}
    .member-btn,.open-btn{padding:8px 12px;font-size:13px;font-weight:700}
    .member-btn{color:var(--theme)}
    .open-btn{background:var(--theme);color:#fff;border-radius:3px}
    .hamburger{display:none;width:40px;height:40px;padding:9px;border:1px solid var(--line);background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--theme);transition:.2s}
    .hamburger.active span:first-child{transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;background:rgba(7,20,35,.48);opacity:0;visibility:hidden;transition:.2s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(380px,88vw);height:100vh;padding:18px;background:#fff;transform:translateX(100%);transition:.25s;z-index:50;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:14px;padding-bottom:16px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}
    .drawer-head>a{margin-left:auto;padding:6px 10px;background:var(--theme);color:#fff;border-radius:3px;font-size:13px}
    .drawer-close{border:0;background:transparent;color:var(--ink);font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding-top:12px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 2px;border:0;border-bottom:1px solid #E8EEF2;background:transparent;color:var(--ink);text-align:left;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--cyan);font-size:18px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{max-height:0;overflow:hidden;transition:.2s;background:#F5FAFC}
    .drawer-submenu.open{max-height:600px;padding:5px 12px}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:80px;padding:54px 0 20px;background:#142033;color:#D9E4ED}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
    .footer-brand strong{display:block;margin-bottom:12px;color:#fff;font-size:20px}
    .footer p{margin:8px 0;color:#AFC0CF;font-size:13px}
    .footer h3{margin:0 0 13px;color:#fff;font-size:14px}
    .footer-grid>div:not(.footer-brand) a,.footer-grid>div:not(.footer-brand) span{display:block;margin:7px 0;color:#AFC0CF;font-size:13px}
    .footer a:hover{color:#7ED9E7}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:18px;border-top:1px solid #304154;color:#8FA4B6;font-size:12px}
    .download-page-main{background:linear-gradient(180deg,#F3FAFC 0,#fff 58%);padding-bottom:10px}
    .download-hero{padding:74px 0 52px;text-align:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;color:var(--cyan);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--cyan)}
    .download-hero h1{max-width:720px;margin:0 auto 16px;color:var(--ink);font-size:clamp(32px,5vw,56px);line-height:1.12;letter-spacing:0}
    .download-hero p{max-width:650px;margin:0 auto;color:var(--muted);font-size:17px}
    .download-panel{width:min(1020px,100%);margin:0 auto;padding:30px;background:#fff;border:1px solid #DDE9EF;box-shadow:var(--shadow)}
    .download-panel-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}
    .download-panel-head h2{margin:0;font-size:23px}
    .download-panel-head p{margin:0;color:var(--muted);font-size:13px}
    .download-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
    .download-steps:before{content:"";position:absolute;top:25px;left:8%;right:8%;height:2px;background:#B7D9E2}
    .download-step{position:relative;z-index:1;padding:0 12px;text-align:center}
    .step-icon{width:52px;height:52px;display:grid;place-items:center;margin:0 auto 14px;border:2px solid var(--cyan);border-radius:50%;background:#fff;color:var(--cyan);font-size:21px;font-weight:800}
    .download-step strong{display:block;margin-bottom:5px;font-size:15px}
    .download-step p{margin:0;color:var(--muted);font-size:13px;line-height:1.55}
    .download-content{width:min(1020px,100%);margin:34px auto 0;display:grid;grid-template-columns:1.15fr .85fr;gap:24px}
    .download-box{padding:26px;background:#fff;border:1px solid #DDE9EF}
    .download-box h2{margin:0 0 8px;color:var(--theme);font-size:21px}
    .download-box>p{margin:0 0 20px;color:var(--muted);font-size:14px}
    .platform-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .platform-card{display:flex;align-items:center;gap:13px;padding:15px;border:1px solid var(--line);transition:.2s}
    .platform-card:hover{border-color:var(--cyan);background:var(--pale)}
    .platform-icon{width:38px;height:38px;display:grid;place-items:center;background:#E7F7FA;color:var(--cyan);font-size:19px;font-weight:800}
    .platform-card strong{display:block;font-size:14px}
    .platform-card span{display:block;color:var(--muted);font-size:12px}
    .platform-card b{margin-left:auto;color:var(--theme);font-size:17px}
    .download-note{display:flex;gap:12px;margin-top:16px;padding:13px;background:#FFF8E8;color:#70551B;font-size:13px}
    .download-note b{color:#C18400}
    .account-box{background:var(--theme);color:#fff;border-color:var(--theme)}
    .account-box h2{color:#fff}
    .account-box>p{color:#DCE8F6}
    .account-list{margin:0 0 22px;padding:0;list-style:none}
    .account-list li{display:flex;gap:10px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.18);font-size:14px}
    .account-list li:before{content:"✓";color:#7ED9E7;font-weight:800}
    .account-button{display:inline-block;padding:11px 17px;border-radius:3px;background:#7ED9E7;color:#123448;font-size:14px;font-weight:800}
    .faq-section{width:min(1020px,100%);margin:34px auto 0}
    .faq-section h2{margin:0 0 16px;font-size:24px}
    .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .faq-item{padding:18px 20px;background:#fff;border:1px solid var(--line)}
    .faq-item h3{margin:0 0 7px;font-size:15px}
    .faq-item p{margin:0;color:var(--muted);font-size:13px}
    @media(max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{align-items:flex-start;padding:8px 0;flex-direction:column;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .member-btn{display:none}
      .header-inner{height:68px}
      .header-btns{gap:6px}
      .download-hero{padding:50px 0 36px}
      .download-hero h1{font-size:36px}
      .download-hero p{font-size:15px}
      .download-panel{padding:20px 14px}
      .download-panel-head{display:block}
      .download-panel-head p{margin-top:5px}
      .download-steps{grid-template-columns:1fr 1fr;gap:25px 4px}
      .download-steps:before{display:none}
      .download-step{padding:0 5px}
      .download-content,.faq-grid{grid-template-columns:1fr}
      .platform-list{grid-template-columns:1fr}
      .footer{margin-top:52px;padding-top:38px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:26px 18px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:7px}
    }
    @media(max-width:430px){
      .open-btn{padding:7px 9px;font-size:12px}
      .footer-grid{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
    }