:root {
  color-scheme: dark;
  --bg: #070809;
  --surface: #111318;
  --line: #2a2d34;
  --text: #f6f7f8;
  --muted: #b7bbc4;
  --gold: #ffc928;
  --danger: #ff7474;
  --max: 1040px;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 82% -12%, rgba(255, 201, 40, .14), transparent 26rem),
    radial-gradient(circle at 0% 18%, rgba(255, 255, 255, .045), transparent 23rem),
    var(--bg);
  font-family: Inter, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  line-height: 1.72;
}

a { color: inherit; text-underline-offset: .18em; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
.site-header, main, footer { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 82px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-size: 1.12rem; font-weight: 800; letter-spacing: -.02em; text-decoration: none; }
.brand-mark { display: grid; width: 34px; height: 34px; place-items: center; border-radius: 10px; color: #070809; background: var(--gold); font-size: .78rem; letter-spacing: -.07em; }
nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 18px; }
nav a { color: var(--muted); font-size: .93rem; text-decoration: none; }
nav a:hover { color: var(--gold); }
main { padding: clamp(44px, 8vw, 92px) 0 64px; }
.hero { max-width: 760px; padding: 12px 0 clamp(48px, 9vw, 88px); }
.eyebrow, .card-kicker { margin: 0 0 10px; color: var(--gold); font-size: .76rem; font-weight: 800; letter-spacing: .13em; }
h1, h2, h3 { margin: 0; letter-spacing: -.035em; line-height: 1.2; }
h1 { max-width: 680px; font-size: clamp(2.35rem, 7vw, 5rem); }
h2 { font-size: clamp(1.45rem, 3vw, 2rem); }
h3 { font-size: 1.1rem; }
.lead { max-width: 680px; margin: 24px 0 0; color: var(--muted); font-size: clamp(1.02rem, 2vw, 1.16rem); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 20px; border: 1px solid var(--line); border-radius: 14px; font-weight: 750; text-decoration: none; }
.button-primary { color: #080808; border-color: var(--gold); background: var(--gold); }
.button-primary:hover { background: #ffda62; }
.button-secondary { background: var(--surface); }
.button-secondary:hover { border-color: var(--gold); color: var(--gold); }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.info-card, .notice, .content-card, .step-card { border: 1px solid var(--line); border-radius: 22px; background: linear-gradient(145deg, rgba(23, 26, 32, .96), rgba(14, 16, 19, .96)); }
.info-card { display: flex; flex-direction: column; min-height: 230px; padding: 25px; }
.info-card p { flex: 1; margin: 15px 0 22px; color: var(--muted); }
.info-card a { color: var(--gold); font-weight: 750; text-decoration: none; }
.info-card a:hover { text-decoration: underline; }
.notice { display: grid; grid-template-columns: minmax(220px, .75fr) 1.25fr; gap: 28px; margin-top: 16px; padding: 30px; }
.notice p:last-child { margin: 0; color: var(--muted); }
.page-heading { max-width: 780px; margin-bottom: 44px; }
.page-heading p:last-child { margin: 18px 0 0; color: var(--muted); }
.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; align-items: start; gap: 24px; }
.content-card { padding: clamp(22px, 4vw, 38px); }
.content-card + .content-card { margin-top: 16px; }
.content-card p, .content-card li { color: var(--muted); }
.content-card p:first-of-type { margin-top: 16px; }
.content-card ul, .content-card ol { padding-left: 1.25em; }
.content-card li + li { margin-top: 9px; }
.content-card a { color: var(--gold); }
.content-card a.button-primary { color: #000; }
.side-nav { position: sticky; top: 20px; padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: rgba(17, 19, 24, .76); }
.side-nav strong { display: block; margin-bottom: 10px; font-size: .86rem; }
.side-nav a { display: block; padding: 7px 0; color: var(--muted); font-size: .9rem; text-decoration: none; }
.side-nav a:hover { color: var(--gold); }
.feature-list { display: grid; gap: 12px; }
.feature-row { display: grid; grid-template-columns: 36px 1fr; gap: 14px; align-items: start; padding: 14px 0; border-top: 1px solid var(--line); }
.feature-row:first-child { border-top: 0; padding-top: 0; }
.feature-icon { display: grid; width: 36px; height: 36px; place-items: center; border-radius: 11px; color: #090909; background: var(--gold); font-weight: 900; }
.feature-row p { margin: 5px 0 0; }
.step-list { display: grid; gap: 12px; }
.step-card { padding: 20px; }
.step-number { display: inline-grid; width: 30px; height: 30px; margin-bottom: 9px; place-items: center; border-radius: 50%; color: #111; background: var(--gold); font-size: .82rem; font-weight: 850; }
.step-card p { margin: 5px 0 0; color: var(--muted); }
.warning { border-color: rgba(255, 116, 116, .48); }
.warning h2 { color: var(--danger); }
.legal-meta { margin-top: 28px; color: #8e949f; font-size: .88rem; }
.support-section { margin-top: 32px; scroll-margin-top: 24px; }
.support-section h3 { margin-top: 28px; }
footer { display: flex; justify-content: space-between; gap: 18px; padding: 28px 0 38px; border-top: 1px solid var(--line); color: #959ba5; font-size: .86rem; }
footer a { color: var(--muted); }
footer a:hover { color: var(--gold); }
@media (max-width: 760px) { .site-header, main, footer { width: min(100% - 32px, var(--max)); } .site-header { align-items: flex-start; flex-direction: column; gap: 14px; padding: 18px 0; } nav { justify-content: flex-start; gap: 12px 16px; } .card-grid { grid-template-columns: 1fr; } .notice, .content-layout { grid-template-columns: 1fr; } .side-nav { position: static; order: -1; } footer { align-items: flex-start; flex-direction: column; } }
@media (max-width: 430px) { main { padding-top: 38px; } nav a { font-size: .84rem; } .info-card, .content-card { border-radius: 18px; } .notice { padding: 23px; } .actions .button { width: 100%; } }