:root {
  /* Botanical academic palette: 优雅复古 + 清新自然 */
  --bg: #f6f3ee;
  --panel: #fbf9f6;
  --panel-soft: #f1ece5;
  --text: #2f312d;
  --muted: #6f7168;

  /* 主强调色：植物绿 */
  --accent: #426b57;
  --accent-hover: #355746;
  --accent-soft: #dce8df;

  /* 次级色：雾灰绿 */
  --accent-2: #8ca395;

  /* 复古暖调 */
  --warm: #a07c64;
  --warm-soft: #efe5da;

  --border: rgba(47, 49, 45, 0.08);
  --shadow: 0 6px 20px rgba(47, 49, 45, 0.05);

  /* 替换原来的 rose / blue 系 */
  --hero-bg: #ece4da;
  --hero-tint: #f3ede5;
  --list-highlight: #e5efe8;
  --tag-bg: #eef4ef;
  --tag-border: #d4e2d7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.8;
  font-size: 16px;
  letter-spacing: 0.01em;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.wrap {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(246, 243, 238, 0.88);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  align-items: center;
}

.site-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: "Noto Serif SC", "Source Han Serif CN", "Songti SC", "SimSun", serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  text-shadow: 1px 1px 0 rgba(160, 124, 100, 0.08);
}

.site-title a {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.site-title a:hover {
  color: var(--accent);
  text-shadow: 1px 2px 6px rgba(66, 107, 87, 0.12);
}

.site-logo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 2px 10px rgba(66, 107, 87, 0.08);
}

.site-tagline {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--text);
  font-weight: 500;
  padding: 4px 2px;
  position: relative;
}

.site-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.22s ease;
}

.site-nav a:hover::after {
  width: 100%;
}

main.wrap {
  padding: 32px 0 48px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 28px 24px;
  margin-bottom: 24px;
  background: linear-gradient(180deg, var(--hero-bg) 0%, var(--hero-tint) 100%);
  border: 1px solid rgba(160, 124, 100, 0.12);
}

.hero h1 {
  font-family: "Noto Serif SC", "Source Han Serif CN", "Songti SC", "SimSun", serif;
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text);
}

.eyebrow {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--warm);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.grid {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}

.three-up {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.section-card {
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.section-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(47, 49, 45, 0.06);
  border-color: rgba(66, 107, 87, 0.14);
}

.section-card h2,
.post-item h2,
.post-item h3 {
  margin-top: 0;
  color: var(--text);
  font-family: "Noto Serif SC", "Source Han Serif CN", "Songti SC", "SimSun", serif;
  font-weight: 600;
}

.section-card h2 { font-size: 1.2rem; }
.post-item h2 { font-size: 1.15rem; }
.post-item h3 { font-size: 1.05rem; }

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-family: "Noto Serif SC", "Source Han Serif CN", "Songti SC", "SimSun", serif;
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0;
}

.post-list {
  display: grid;
  gap: 16px;
}

.post-item {
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.post-item:hover {
  transform: translateY(-1px);
  border-color: rgba(66, 107, 87, 0.14);
}

.post-item:first-child {
  background: var(--list-highlight);
  border-color: rgba(66, 107, 87, 0.14);
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.article h1 {
  margin-bottom: 12px;
  font-family: "Noto Serif SC", "Source Han Serif CN", "Songti SC", "SimSun", serif;
  font-size: 1.8rem;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.article h2,
.article h3,
.article h4,
.article h5,
.article h6 {
  font-family: "Noto Serif SC", "Source Han Serif CN", "Songti SC", "SimSun", serif;
  font-weight: 600;
  margin-top: 1.5em;
}

.article h2 { font-size: 1.4rem; }
.article h3 { font-size: 1.2rem; }

.prose :first-child {
  margin-top: 0;
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.prose blockquote {
  margin: 1.2rem 0;
  padding: 1rem 1.2rem;
  background: var(--panel-soft);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  color: var(--text);
}

.prose code {
  background: var(--panel-soft);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.prose pre {
  background: var(--panel-soft);
  padding: 16px;
  border-radius: 10px;
  overflow-x: auto;
  border: 1px solid var(--border);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tag {
  display: inline-flex;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--accent);
  font-size: 0.85rem;
  border: 1px solid var(--tag-border);
  font-weight: 500;
}

.tag:first-child {
  background: var(--warm-soft);
  border-color: rgba(160, 124, 100, 0.18);
  color: var(--warm);
}

.site-footer {
  padding: 0 0 48px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .header-inner,
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .card,
  .hero {
    padding: 20px;
  }

  .article h1 {
    font-size: 1.5rem;
  }

  .site-title {
    font-size: 1.4rem;
  }

  .site-logo {
    width: 40px;
    height: 40px;
  }

  .site-nav {
    width: 100%;
    margin-top: 12px;
  }

  .site-nav a {
    font-size: 0.9rem;
    padding: 6px 12px 6px 0;
  }
}