:root{--theme:#0B3D91;--ink:#122033;--muted:#657286;--line:#e5eaf1;--soft:#f4f7fb;--white:#fff}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:system-ui,-apple-system,"Noto Sans TC","Microsoft JhengHei",sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#071d43;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 var(--line);box-shadow:0 4px 18px #102b5510}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--theme);white-space:nowrap}
    .logo img{width:38px;height:38px;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:26px 13px;font-weight:650;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:12px;color:#8090a5}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);width:310px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:0 18px 40px #142d5418;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
    .mega-menu{width:620px}.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;pointer-events:auto}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .panel-title{margin:0 0 13px;font-size:16px;font-weight:800;color:var(--theme)}
    .panel-list{display:grid;gap:8px}.panel-list a{padding:6px 0;border-bottom:1px solid var(--line);font-size:14px}
    .panel-list a:hover,.mega-card:hover{color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;padding:11px;border:1px solid var(--line);border-radius:10px;min-width:0}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:7px;border-radius:6px}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis}
    .mega-card strong{font-size:13px;white-space:nowrap}.mega-card small{font-size:11px;color:var(--muted);line-height:1.5;margin-top:3px}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-weight:700;font-size:13px}
    .header-btns{display:flex;align-items:center;gap:9px}.member-btn,.open-btn{padding:8px 13px;border-radius:8px;font-size:13px;font-weight:700}
    .member-btn{color:var(--theme);border:1px solid #cbd8ec}.open-btn{color:#fff;background:var(--theme)}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);background:#fff;border-radius:8px;padding:9px;cursor:pointer}
    .hamburger span{display:block;height:2px;background:var(--theme);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:#06173588;z-index:40}.drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:50;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.25s;overflow:auto;box-shadow:-12px 0 35px #06173525}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:20px;border-bottom:1px solid var(--line);font-weight:800;color:var(--theme)}
    .drawer-head a{padding:6px 12px;border-radius:7px;color:#fff;background:var(--theme);font-size:13px}.drawer-close{border:0;background:none;font-size:30px;line-height:1;color:var(--muted);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 var(--line);background:none;text-align:left;font:inherit;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}.drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 8px 15px;border-bottom:1px solid var(--line)}.drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#081c3d;color:#d9e5f7;padding:54px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
    .footer-brand strong{font-size:22px;color:#fff}.footer p{color:#9eb1cd;font-size:13px}.footer h3{margin:0 0 13px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;color:#b8c9e2;font-size:13px;margin:7px 0}.footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #ffffff1c;margin-top:35px;padding-top:18px;color:#8ea4c3;font-size:12px}
    .download-page-main{background:linear-gradient(180deg,#f4f7fc 0,#fff 55%);padding:74px 0 5px}
    .download-hero{text-align:center;max-width:780px;margin:auto}.eyebrow{display:inline-flex;padding:5px 12px;border-radius:30px;background:#e3ebfa;color:var(--theme);font-size:13px;font-weight:800}
    .download-hero h1{font-size:clamp(32px,5vw,58px);line-height:1.15;margin:18px 0 15px;letter-spacing:-.04em}
    .download-hero>p{max-width:650px;margin:0 auto;color:var(--muted);font-size:17px}
    .download-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin:26px 0 54px}.download-actions a{padding:12px 21px;border-radius:9px;font-weight:750}
    .primary-action{background:var(--theme);color:#fff;box-shadow:0 9px 20px #0b3d9130}.secondary-action{background:#fff;color:var(--theme);border:1px solid #cbd8ec}
    .download-card{display:grid;grid-template-columns:1fr 1fr;gap:24px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:0 16px 45px #18365d10;text-align:left}
    .download-card h2,.download-section h2{margin:0 0 10px;font-size:25px}.download-card p{color:var(--muted);margin:0 0 18px}
    .platform-list{display:grid;gap:10px}.platform-item{display:flex;align-items:center;justify-content:space-between;padding:13px 15px;border:1px solid var(--line);border-radius:11px}
    .platform-item strong{display:block}.platform-item small{display:block;color:var(--muted);font-size:12px}.platform-item a{color:var(--theme);font-weight:750;font-size:13px}
    .download-section{padding-top:62px;text-align:center}.download-section>p{color:var(--muted);max-width:650px;margin:0 auto 24px}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;text-align:left}.step{position:relative;padding:24px;background:#fff;border:1px solid var(--line);border-radius:15px}.step-number{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--theme);color:#fff;font-weight:800}.step h3{margin:15px 0 5px;font-size:17px}.step p{margin:0;color:var(--muted);font-size:14px}
    .faq-list{max-width:850px;margin:24px auto 0;text-align:left}.faq-list details{padding:17px 0;border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;font-weight:750}.faq-list p{color:var(--muted);margin:10px 0 0;font-size:14px}
    @media(max-width:1050px){.main-nav{display:none}.header-btns{margin-left:auto}.hamburger{display:block}.footer-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:700px){.container{width:min(100% - 28px,1180px)}.topbar .container{display:block;padding:8px 0}.topbar-links{gap:12px;flex-wrap:wrap}.member-btn{display:none}.header-inner{min-height:68px}.logo{font-size:17px}.logo img{width:32px;height:32px}.download-page-main{padding-top:48px}.download-card{grid-template-columns:1fr;padding:20px}.steps{grid-template-columns:1fr}.footer{margin-top:48px;padding-top:38px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:5px}}
    @media(max-width:430px){.footer-grid{grid-template-columns:1fr}.download-hero h1{font-size:37px}.download-hero>p{font-size:15px}}