:root {
  color-scheme: light;
  --bg: #f4f6f3;
  --panel: #ffffff;
  --panel-soft: #eef5f2;
  --line: #d6dfdc;
  --line-strong: #a9beb7;
  --text: #15201d;
  --muted: #53615d;
  --accent: #146b5d;
  --accent-dark: #0d3d36;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: 220px;
  background: #e7efeb;
  border-bottom: 1px solid rgba(214, 223, 220, 0.8);
  pointer-events: none;
  z-index: -1;
}

.topbar {
  padding: 34px 32px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 252, 251, 0.92);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.08em;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 32px;
  line-height: 1.18;
}

main {
  padding: 24px 32px 42px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.project-card,
.system-note {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 1px 2px rgba(21, 32, 29, 0.05);
}

.project-card {
  min-height: 238px;
  display: flex;
  flex-direction: column;
  padding: 20px;
  color: var(--text);
  text-decoration: none;
}

.project-card.primary {
  border-color: #9fc8bf;
  background: var(--panel-soft);
}

.project-card:hover {
  border-color: var(--line-strong);
  background: #fbfcfb;
}

.project-card span {
  color: var(--accent);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.04em;
}

.project-card strong {
  display: block;
  margin-top: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.project-card p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.62;
}

.project-card b {
  width: fit-content;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  margin-top: auto;
  padding: 0 13px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
}

.project-card:not(.primary) b {
  border-color: var(--line-strong);
  background: #fff;
  color: var(--text);
}

.system-note {
  margin-top: 18px;
  padding: 20px;
}

.system-note h2 {
  font-size: 19px;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.note-grid div {
  min-height: 96px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfb;
}

.note-grid b {
  display: block;
  margin-bottom: 8px;
}

.note-grid p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

@media (max-width: 920px) {
  .topbar,
  main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .project-grid,
  .note-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 28px;
  }
}