:root{color-scheme:dark;--bg:#0B0D10;--card:#161A1F;--line:#252B33;--text:#fff;--dim:#9AA4B2;--brand:#FF2E93;--accent:#4AA3FF;--max:980px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans TC","PingFang HK","PingFang TC",sans-serif;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--accent)}
p,li{color:var(--dim)}strong{color:var(--text)}
h1,h2,h3{color:var(--text);line-height:1.2;letter-spacing:-.01em}
h1{font-size:2rem;margin:.5em 0 .2em}
h2{font-size:1.5rem;margin:0 0 .6em}
h3{font-size:1.05rem;margin:0 0 .4em}
.meta{font-size:.85rem;color:var(--dim)}
code{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:.9em}
ol li,ul li{margin:.35em 0}

/* skip link */
.skip{position:absolute;left:-999px;top:8px;background:var(--brand);color:var(--bg);padding:8px 12px;border-radius:8px;z-index:9}
.skip:focus{left:8px}

/* header — shared by landing + legal pages */
header{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:18px 24px;max-width:var(--max);margin:0 auto}
header a{color:var(--text);text-decoration:none;font-weight:800;letter-spacing:.5px}
header .brand img{height:32px;width:auto}
header nav{display:flex;gap:18px;flex-wrap:wrap;font-size:.92rem}
header nav a{font-weight:600;color:var(--dim)}
header nav a:hover{color:var(--text)}
.mark{width:32px;height:32px;border-radius:50%;background:var(--brand);color:var(--bg);display:grid;place-items:center;font-weight:800}

main{max-width:var(--max);margin:0 auto;padding:8px 24px 64px}

/* legal pages keep the narrow reading width */
main.legal{max-width:820px}
main.legal h2{font-size:1.15rem;margin:2em 0 .5em}

.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 22px;margin:0}
.card p{margin:.3em 0 0}

.btn{display:inline-block;background:var(--brand);color:var(--bg);font-weight:800;border-radius:999px;padding:13px 24px;text-decoration:none;line-height:1.2}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}

/* hero */
.hero{text-align:center;padding:56px 0 40px}
.hero .mark{width:72px;height:72px;font-size:34px;margin:0 auto 18px}
.eyebrow{font-size:.85rem;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);font-weight:700;margin:0 0 14px}
.hero h1{font-size:clamp(2.1rem,6vw,3.6rem);margin:0 0 .5em}
.hero .lede{font-size:1.15rem;max-width:640px;margin:0 auto 26px}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero .meta{margin-top:16px}

.section{padding:44px 0;border-top:1px solid var(--line)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}

.steps{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.steps li{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 22px 20px 62px;position:relative;margin:0}
.steps li::before{content:counter(s);position:absolute;left:18px;top:18px;width:30px;height:30px;border-radius:50%;background:var(--brand);color:var(--bg);font-weight:800;display:grid;place-items:center}
.steps strong{display:block;margin-bottom:4px}
.steps span{color:var(--dim);font-size:.95rem}

.faq details{border-top:1px solid var(--line);padding:6px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:700;color:var(--text);padding:12px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--dim);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq p{margin:0 0 14px}

.partners{text-align:center}
.partners p{max-width:640px;margin:0 auto 22px}

footer{max-width:var(--max);margin:0 auto;padding:24px;border-top:1px solid var(--line);font-size:.85rem;color:var(--dim);display:flex;gap:18px;flex-wrap:wrap;align-items:center;justify-content:space-between}
footer a{color:var(--dim)}
footer nav{display:flex;gap:16px;flex-wrap:wrap}
.foot-brand{display:flex;align-items:center;gap:12px}
.foot-brand img{height:22px;width:auto;opacity:.9}

@media (max-width:600px){
  header{flex-direction:column;align-items:flex-start}
  .hero{padding-top:36px}
  footer{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}