:root {
  color-scheme: light dark;
  --bg: #f5f6f4; --paper: #ffffff; --text: #18201c; --muted: #5f6a64; --line: #dde2de;
  --brand: #12805a; --brand-soft: #e3f2ea;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1311; --paper: #171c19; --text: #eef2ef; --muted: #9aa49e; --line: #2a322d;
    --brand: #3fcf8e; --brand-soft: #16261e; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif; }
a { color: var(--brand); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
header.top { border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; flex-wrap: wrap; }
.mark { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; color: var(--text); }
.mark svg { width: 28px; height: 28px; }
nav { display: flex; gap: 18px; font-size: 14px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--brand); }
.hero { padding-block: 64px 48px; }
.hero h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.25; margin: 0 0 12px; text-wrap: balance; }
.hero p { color: var(--muted); max-width: 40em; margin: 0; font-size: 17px; }
section { padding-block: 32px; border-top: 1px solid var(--line); }
section h2 { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 18px; font-weight: 600; }
.product { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 24px; display: grid; grid-template-columns: 72px 1fr; gap: 20px; }
.product > div { min-width: 0; }
.icon { width: 72px; height: 72px; border-radius: 16px; background: var(--brand); display: grid; place-items: center; }
.icon svg { width: 40px; height: 40px; }
.product h3 { margin: 0 0 4px; font-size: 21px; }
.product .tag { color: var(--muted); margin: 0 0 12px; }
.product ul { margin: 0 0 16px; padding-left: 1.2em; }
.links { display: flex; gap: 8px 18px; flex-wrap: wrap; font-size: 14px; }
dl { display: grid; grid-template-columns: 9em 1fr; gap: 10px 16px; margin: 0; }
dt { color: var(--muted); }
dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }
footer { border-top: 1px solid var(--line); padding-block: 24px 40px; color: var(--muted); font-size: 13px; }
footer .wrap { display: flex; flex-direction: column; gap: 4px; }
@media (max-width: 560px) {
  .product { grid-template-columns: 1fr; }
  dl { grid-template-columns: 1fr; gap: 2px; }
  dd { margin-bottom: 10px; }
}