:root {
  --mint: #E0F2E9;
  --forest: #1B4332;
  --leaf: #95D5B2;
  --deep: #081C15;
  --fog: #D8EDE1;
  --muted: #3D5C4E;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Palatino Linotype", "Songti SC", "STSong", "Microsoft YaHei", serif;
  background: var(--mint);
  color: var(--deep);
  line-height: 1.78;
}

a { color: var(--forest); }

.wrap { width: min(1100px, calc(100% - 32px)); margin: 0 auto; }

.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.wordmark {
  font-weight: 700;
  color: var(--forest);
}

.nav { display: flex; gap: 14px; font-size: 14px; }
.nav a { text-decoration: none; color: var(--deep); }

.btn {
  background: var(--forest);
  color: #E0F2E9;
  text-decoration: none;
  padding: 11px 20px;
  border-radius: 18px 4px 18px 4px;
  font-weight: 700;
}

.bleed {
  background: var(--forest);
  color: #E0F2E9;
  padding: 54px 0 70px;
  position: relative;
}

.hero-offset {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: start;
}

.hero-card {
  background: var(--mint);
  color: var(--deep);
  padding: 28px 26px;
  border-radius: 8px 28px 8px 28px;
  margin-top: 28px;
  box-shadow: 14px 14px 0 rgba(8, 28, 21, 0.35);
}

h1 { font-size: clamp(26px, 3.5vw, 38px); line-height: 1.3; margin-bottom: 12px; }
.hero-card p { margin-bottom: 10px; color: var(--muted); }

.visual-slab {
  background: #081C15;
  border: 2px solid var(--leaf);
  border-radius: 20px 6px 20px 6px;
  padding: 18px;
}

section { padding: 50px 0; }
h2 { font-size: clamp(22px, 3vw, 30px); color: var(--forest); margin-bottom: 12px; }
.lead { color: var(--muted); margin-bottom: 16px; }

.masonry svg { width: 28px; height: 28px; margin-bottom: 8px; color: #1b4332; display: block; }
.masonry {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 16px;
}

.wide, .narrow {
  background: #fff;
  border-radius: 14px;
  padding: 18px;
}

.narrow { background: var(--leaf); }
.narrow h3 { margin-bottom: 8px; }

.offset-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 16px;
}

.offset-grid article {
  background: #fff;
  padding: 18px;
  border-radius: 12px;
}

.offset-grid article:first-child { margin-top: 24px; }

.step-line {
  display: flex;
  gap: 10px;
  overflow: auto;
}

.step-line article {
  min-width: 200px;
  background: #fff;
  padding: 14px;
  border-top: 6px solid var(--forest);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.two-col article {
  background: #fff;
  padding: 18px;
  border-radius: 12px;
}

.tips {
  background: var(--fog);
  border-radius: 16px;
  padding: 22px;
}

.tips ol { padding-left: 20px; }
.tips li { margin-bottom: 8px; }

.limit {
  margin-top: 14px;
  border: 1px solid var(--forest);
  padding: 12px 14px;
  background: #fff;
}

details {
  background: #fff;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 8px;
}

summary { cursor: pointer; font-weight: 700; color: var(--forest); }
details p { margin-top: 8px; color: var(--muted); }

.foot {
  background: var(--deep);
  color: #CDE7D8;
  padding: 30px 0;
  font-size: 14px;
}
.foot p { margin-bottom: 7px; }
.foot strong { color: var(--leaf); }

@media (max-width: 880px) {
  .hero-offset, .masonry, .offset-grid, .two-col { grid-template-columns: 1fr; }
  .hero-card { margin-top: 0; }
  .nav { display: none; }
}

.news-site { padding: 36px 0; }
.news-masonry { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 14px; }
.news-masonry article { background: #fff; padding: 16px; border-radius: 8px; }
.news-masonry article:nth-child(odd) { background: #d8f3e4; }
.news-masonry time { color: #1b4332; font-size: 12px; font-weight: 700; }
.news-masonry h3 { margin: 6px 0 8px; }
@media (max-width: 800px) { .news-masonry { grid-template-columns: 1fr; } }