:root { --bg: #f5f6f8; --card: #fff; --text: #1d2129; --muted: #86909c; --line: #e5e6eb; --brand: #1677ff; --code: #f2f3f5; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1114; --card: #1a1d21; --text: #e8eaed; --muted: #8b8f96; --line: #2a2e34; --code: #262a30; } }
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }
.top { border-bottom: 1px solid var(--line); background: var(--card); }
.top .wrap { display: flex; justify-content: space-between; align-items: center; height: 56px; }
.brand { display: inline-flex; gap: 8px; align-items: center; font-weight: 600; }
.muted { color: var(--muted); font-size: 13px; }
.hero { padding: 56px 0 32px; }
.hero h1 { font-size: 34px; line-height: 1.25; margin: 0 0 14px; letter-spacing: -.5px; }
.lead { font-size: 17px; max-width: 660px; margin: 0 0 24px; color: var(--muted); }
.cta { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 26px; border-radius: 10px; border: 1px solid var(--line); text-decoration: none; color: var(--text); font-weight: 600; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.disabled { opacity: .45; pointer-events: none; }
.hint { margin: 14px 0 0; color: var(--muted); font-size: 13px; }
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); padding-bottom: 40px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px 24px; }
.card h2 { font-size: 17px; margin: 0 0 12px; }
.steps, .list { margin: 0; padding-left: 20px; }
.steps li, .list li { margin: 8px 0; }
code { background: var(--code); border-radius: 5px; padding: 1px 6px; font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; }
.faq dt { font-weight: 600; margin-top: 12px; }
.faq dd { margin: 2px 0 0; color: var(--muted); }
.foot { padding: 18px 20px 40px; border-top: 1px solid var(--line); }
@media (max-width: 560px) { .hero h1 { font-size: 26px; } .hero { padding-top: 36px; } }
[hidden]{display:none!important}