:root{--ink:#121417;--paper:#fff;--fog:#eceef0;--muted:#626a70;--line:rgba(18,20,23,.14);--dark-muted:rgba(238,240,242,.74)}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Figtree,"Noto Sans TC",system-ui,sans-serif;line-height:1.6}
a{color:inherit;text-underline-offset:.18em}a:focus-visible{outline:3px solid #586d6a;outline-offset:3px}
.skip{position:absolute;left:-9999px;top:8px;background:#fff;padding:10px;z-index:100}.skip:focus{left:10px}
.wrap{width:min(1160px,calc(100% - 40px));margin-inline:auto}
header{background:var(--ink);color:#fff;border-bottom:1px solid rgba(255,255,255,.15)}
nav{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;padding:14px 0}
.brand{font:700 18px Saira,"Noto Sans TC",sans-serif;letter-spacing:.04em;text-decoration:none}
.navlinks{display:flex;align-items:center;gap:18px;flex-wrap:wrap;font-size:14px}.navlinks a{text-decoration:none;padding:8px 0}
.lang{border:1px solid rgba(255,255,255,.36);padding:8px 12px!important;min-height:42px}
.hero{background:var(--ink);color:#fff;padding:clamp(64px,10vw,130px) 0 76px;background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);background-size:24px 24px}
.kicker{font:500 12px "IBM Plex Mono",monospace;letter-spacing:.14em;text-transform:uppercase;color:#aab2b8}
h1,h2,h3{font-family:Saira,"Noto Sans TC",sans-serif;line-height:1.08;letter-spacing:-.025em;text-wrap:balance}
h1{font-size:clamp(42px,7vw,82px);max-width:15ch;margin:20px 0 18px;text-transform:uppercase}
h2{font-size:clamp(30px,4.5vw,54px);margin:0 0 18px}h3{font-size:clamp(20px,2.5vw,27px);margin:0 0 10px}
.lede{font-size:clamp(17px,2vw,20px);max-width:66ch;color:rgba(255,255,255,.82);margin:0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 19px;background:#fff;color:var(--ink);font-weight:700;text-decoration:none;min-height:48px}
.button.secondary{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.42)}
.note{font-size:14px;color:var(--muted);max-width:75ch}.hero .note{color:rgba(255,255,255,.7)}
section{padding:clamp(56px,8vw,94px) 0;border-bottom:1px solid var(--line)}
.section-intro{max-width:72ch;font-size:17px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(245px,100%),1fr));gap:14px;margin-top:32px}
.card{border:1px solid var(--line);padding:24px;background:#fff}.card p,.card li{color:#515a60}
.card ul{padding-left:20px;margin:12px 0 0}.card li{margin:6px 0}
.band{background:var(--fog)}.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(210px,100%),1fr));gap:12px;margin-top:32px;counter-reset:step}
.step{border-top:2px solid var(--ink);padding:18px 8px 0}.step:before{counter-increment:step;content:"0" counter(step);font:500 13px "IBM Plex Mono",monospace;color:var(--muted);display:block;margin-bottom:12px}
.security,.contact{background:var(--ink);color:#fff}.security .section-intro,.security li,.contact .section-intro{color:rgba(255,255,255,.78)}
.security ul{padding-left:22px;max-width:80ch}.security li{margin:10px 0}
.faq{border-top:1px solid var(--line);padding:18px 0}.faq h3{font-size:19px}
footer{background:#121417;color:rgba(255,255,255,.76);padding:28px 0;font-size:14px}footer a{color:#fff}
@media(max-width:640px){.wrap{width:min(calc(100% - 32px),1160px)}nav{align-items:flex-start}.navlinks{gap:10px 14px}.hero{padding-top:55px}.hero-actions .button{width:100%}.card{padding:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}