:root {
  --teal: #0a7a72;
  --ink: #073331;
  --text: #1c1c1e;
  --muted: #5c6b6a;
  --bg: #f7f4ef;
  --card: #ffffff;
  --line: #e6e1d8;
  --max: 44rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
}

a { color: var(--teal); }
header, main, footer { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
header { padding-top: 1.5rem; padding-bottom: 1rem; }
nav { display: flex; flex-wrap: wrap; gap: 0.75rem 1.1rem; font-size: 0.92rem; }
.brand { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 0.85rem; text-decoration: none; color: var(--ink); }
.mark {
  width: 36px; height: 36px; border-radius: 9px; background: var(--ink);
  display: grid; place-items: center;
}
h1 { font-size: 1.7rem; line-height: 1.25; margin: 0.2rem 0 0.4rem; }
.lede { color: var(--muted); margin: 0 0 1.5rem; }
.meta { color: var(--muted); font-size: 0.92rem; }
article { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 1.4rem 1.3rem 2rem; margin-bottom: 1.5rem; }
h2 { font-size: 1.15rem; margin: 1.6rem 0 0.45rem; color: var(--ink); }
p, li { margin: 0.55rem 0; }
ul { padding-left: 1.2rem; }
.note {
  background: #eef6f5; border-radius: 12px; padding: 0.9rem 1rem; color: var(--ink);
  font-size: 0.95rem;
}
footer { padding: 1.5rem 1.25rem 2.5rem; color: var(--muted); font-size: 0.88rem; }
.en { border-top: 1px solid var(--line); margin-top: 2rem; padding-top: 0.4rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 1.2rem 0 2rem; }
.btn {
  display: inline-block; background: var(--ink); color: #fff; text-decoration: none;
  padding: 0.7rem 1rem; border-radius: 12px; font-weight: 600;
}
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }