/* Set 4 — split hero + horizontal timeline, forest green */
:root {
  --bg: #f7faf7;
  --ink: #122017;
  --mute: #4d5d52;
  --line: #cdd8cf;
  --green: #065f46;
  --leaf: #047857;
  --mint: #ecf8f2;
  --card: #ffffff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Iowan Old Style", "Times New Roman", "Songti SC", serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.75;
}
.bar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 18px 5vw 0;
  border-bottom: 2px solid var(--green);
  background: #fff;
}
.brand {
  font-size: 24px;
  color: var(--green);
  text-decoration: none;
  font-weight: 700;
  padding-bottom: 12px;
}
.nav { display: flex; gap: 0; }
.nav a {
  text-decoration: none;
  color: var(--mute);
  padding: 12px 18px;
  border-bottom: 3px solid transparent;
  font-size: 15px;
}
.nav a.current { color: var(--green); border-bottom-color: var(--green); font-weight: 700; }
.frame { padding: 0 5vw 64px; }
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
  padding: 36px 0 20px;
}
.split h1 { font-size: 32px; line-height: 1.3; color: var(--green); margin-bottom: 14px; }
.lead { color: var(--mute); margin-bottom: 18px; }
.act {
  display: inline-block;
  background: var(--green);
  color: #fff;
  text-decoration: none;
  padding: 12px 22px;
  font-size: 16px;
}
.act:hover { background: #044433; }
.act svg { width: 16px; height: 16px; vertical-align: -2px; margin-right: 6px; }
.note { font-size: 13px; color: var(--mute); margin-top: 10px; }
.visual {
  background: var(--mint);
  border: 1px solid var(--line);
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.visual svg { width: 86%; max-width: 320px; height: auto; }
.track {
  display: flex;
  gap: 0;
  margin: 10px 0 28px;
  border-top: 2px solid var(--green);
  overflow-x: auto;
}
.track li {
  list-style: none;
  flex: 1;
  min-width: 160px;
  padding: 16px 14px 8px;
  border-right: 1px solid var(--line);
  background: #fff;
}
.track strong { display: block; color: var(--leaf); margin-bottom: 6px; }
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 22px 26px;
  margin-bottom: 18px;
}
.panel h2 { font-size: 22px; color: var(--green); margin-bottom: 10px; }
.panel p { margin-bottom: 10px; }
.panel ul, .panel ol { margin: 6px 0 10px 22px; }
.faq-item { padding: 12px 0; border-top: 1px solid var(--line); }
.faq-item h3 { font-size: 17px; margin-bottom: 6px; }
.base {
  background: var(--green);
  color: #e7f5ee;
  padding: 26px 5vw 34px;
  font-size: 13px;
}
.base p { margin-bottom: 10px; }
.base nav { margin-bottom: 10px; }
.base nav a { color: #fff; margin-right: 12px; text-decoration: none; }
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .bar { flex-direction: column; align-items: flex-start; }
  .track { flex-direction: column; }
}