:root {
  --green: #37B97D;
  --ink: #242424;
  --sub: #5b5b57;
  --bg: #FAFAF5;
  --card: #FFFFFF;
  --border: #ECEAE3;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.85;
  -webkit-text-size-adjust: 100%;
}
header.site {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 760px;
  margin: 0 auto;
  padding: 20px;
}
.logo {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: var(--green);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
}
.brand { font-weight: 800; font-size: 18px; }
.wrap { max-width: 760px; margin: 0 auto; padding: 8px 20px 80px; }
h1 { font-size: 26px; margin-bottom: 4px; }
h2 {
  font-size: 18px;
  margin-top: 34px;
  border-left: 4px solid var(--green);
  padding-left: 10px;
}
.sub { color: var(--sub); font-size: 14px; margin-top: 0; }
a { color: var(--green); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 22px;
  margin: 18px 0;
}
.btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 12px;
  background: var(--green);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}
.btn.ghost { background: #fff; color: var(--ink); border: 1px solid var(--border); }
.muted { color: var(--sub); font-size: 13px; }
.lang { font-size: 13px; margin-top: 8px; }
ul { padding-left: 1.2em; }
li { margin: 4px 0; }
.note {
  background: #E7F6EE;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 14px;
}
footer {
  max-width: 760px;
  margin: 48px auto 0;
  padding: 16px 20px 40px;
  color: var(--sub);
  font-size: 13px;
  border-top: 1px solid var(--border);
}