:root {
  color-scheme: light;
  --bg: #f6f8f4;
  --text: #1f2d25;
  --muted: #5f6f63;
  --line: #d9e2d6;
  --card: #ffffff;
  --accent: #2f6f4e;
  --accent-2: #5c7f36;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
.site-header {
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}
.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
.brand { font-weight: 700; font-size: 18px; }
.links { display: flex; gap: 18px; color: var(--muted); font-size: 14px; }
.links a:hover { color: var(--accent); }
.hero {
  min-height: 430px;
  display: flex;
  align-items: center;
  background:
    linear-gradient(120deg, rgba(47,111,78,.88), rgba(92,127,54,.76)),
    url("data:image/svg+xml,%3Csvg xmlns=http://www.w3.org/2000/svg width=1200 height=700 viewBox=0 0 1200 700%3E%3Crect width=1200 height=700 fill=%23e5efe1/%3E%3Cg fill=none stroke=%23ffffff stroke-opacity=.42 stroke-width=3%3E%3Cpath d=M100 560C220 430 330 420 460 300S760 150 1080 110/%3E%3Cpath d=M80 620C220 500 360 500 520 390S800 250 1140 230/%3E%3C/g%3E%3Cg fill=%23ffffff fill-opacity=.28%3E%3Cpath d=M270 250c70-120 170-120 240 0-70 38-170 38-240 0Z/%3E%3Cpath d=M690 390c60-100 150-100 210 0-60 34-150 34-210 0Z/%3E%3Ccircle cx=960 cy=170 r=42/%3E%3C/g%3E%3C/svg%3E") center/cover;
  color: #fff;
}
.hero-inner { max-width: 1080px; width: 100%; margin: 0 auto; padding: 64px 24px; }
.eyebrow { margin: 0 0 12px; letter-spacing: 0; font-size: 14px; opacity: .9; }
h1 { max-width: 780px; margin: 0; font-size: clamp(34px, 6vw, 62px); line-height: 1.12; font-weight: 760; }
.lead { max-width: 680px; margin: 22px 0 0; font-size: 18px; opacity: .94; }
.section { max-width: 1080px; margin: 0 auto; padding: 72px 24px; }
.section-head { margin-bottom: 24px; }
h2 { margin: 0 0 10px; font-size: 30px; line-height: 1.25; }
h3 { margin: 10px 0 8px; font-size: 20px; }
p { margin: 0; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.card, .panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}
.tag { color: var(--accent); font-size: 13px; font-weight: 700; }
.split { display: grid; grid-template-columns: 1.3fr .7fr; gap: 32px; align-items: start; }
ul { margin: 12px 0 0; padding-left: 20px; color: var(--muted); }
.contact { border-top: 1px solid var(--line); }
.footer { border-top: 1px solid var(--line); padding: 28px 24px; text-align: center; background: #fff; }
.footer p { font-size: 14px; }
@media (max-width: 760px) {
  .nav { align-items: flex-start; flex-direction: column; }
  .links { flex-wrap: wrap; }
  .hero { min-height: 390px; }
  .grid, .split { grid-template-columns: 1fr; }
  .section { padding: 52px 20px; }
}
.timeline {
  display: grid;
  gap: 16px;
}
.note {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent-2);
  border-radius: 8px;
  padding: 20px 22px;
}
.note time {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}
.note h3 {
  margin-top: 8px;
}
.mt { margin-top: 14px; }
.contact-box {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.contact-box > div {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}
@media (max-width: 760px) {
  .contact-box { grid-template-columns: 1fr; }
}
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.knowledge {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}
.source-note {
  margin-top: 18px;
  font-size: 13px;
}
@media (max-width: 760px) {
  .knowledge-grid { grid-template-columns: 1fr; }
}