:root {
  --bg: #f4efe4;
  --paper: #fffaf1;
  --ink: #2b2720;
  --muted: #6d6558;
  --line: #e4d9c6;
  --accent: #3f6b52;
  --accent-soft: #e7efe8;
  --code-bg: #f0eadc;
  --code-ink: #3a3228;
  --shadow: 0 10px 30px rgba(70, 55, 30, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(63, 107, 82, 0.08), transparent 28%),
    linear-gradient(180deg, #f7f2e7 0%, var(--bg) 180px);
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  line-height: 1.85;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  padding: 22px 0 16px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: inherit;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

.brand .portrait {
  display: block;
  box-sizing: border-box;
  width: 96px;
  height: 72px;
  max-width: 96px;
  max-height: 72px;
  object-fit: contain;
  object-position: center;
  flex: 0 0 96px;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.mark {
  width: 42px;
  height: 42px;
  border: 1.5px solid var(--accent);
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-family: "IBM Plex Mono", "Menlo", monospace;
  font-size: 15px;
  letter-spacing: 0.04em;
}

.brand h1 {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.18em;
}

.nav {
  display: flex;
  gap: 22px;
  margin-top: 16px;
  font-size: 15px;
}

.nav a {
  color: var(--muted);
}

.nav a.active,
.nav a:hover {
  color: var(--ink);
  text-decoration: none;
}

.hero {
  padding: 56px 0 18px;
}

.hero .kicker {
  color: var(--accent);
  letter-spacing: 0.28em;
  font-size: 12px;
}

.hero h2 {
  margin: 10px 0 12px;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero p {
  max-width: 640px;
  color: var(--muted);
  margin: 0;
}

.list {
  padding: 12px 0 64px;
  display: grid;
  gap: 18px;
}

.card {
  display: block;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px 24px;
  box-shadow: var(--shadow);
  color: inherit;
  text-decoration: none;
}

.card:hover {
  text-decoration: none;
  border-color: #cfc3ab;
}

.meta {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.card h3 {
  margin: 8px 0 8px;
  font-size: 22px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.article {
  padding: 42px 0 72px;
}

.article header h2 {
  margin: 8px 0 8px;
  font-size: 32px;
  letter-spacing: 0.06em;
}

.prose {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 32px 36px;
  box-shadow: var(--shadow);
}

.prose p {
  margin: 0 0 1.1em;
}

.prose h3 {
  margin: 1.6em 0 0.6em;
  font-size: 20px;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
  color: var(--ink);
}

.prose li + li {
  margin-top: 0.35em;
}

pre {
  overflow: auto;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  color: var(--code-ink);
  font-family: "IBM Plex Mono", "Menlo", "Consolas", monospace;
  font-size: 13.5px;
  line-height: 1.65;
}

code {
  font-family: "IBM Plex Mono", "Menlo", "Consolas", monospace;
  font-size: 0.92em;
  background: var(--accent-soft);
  padding: 0.08em 0.35em;
  border-radius: 4px;
}

pre code {
  background: none;
  padding: 0;
}

.note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 10px 10px 0;
  color: #355544;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 36px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.site-footer p {
  margin: 0 0 6px;
}

.site-footer a {
  color: var(--ink);
  letter-spacing: 0.04em;
}

@media (max-width: 640px) {
  .brand .portrait {
    width: 72px;
    height: 54px;
    max-width: 72px;
    max-height: 54px;
    flex-basis: 72px;
  }

  .hero h2,
  .article header h2 {
    font-size: 26px;
  }

  .prose {
    padding: 22px 18px;
  }
}