:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #6e7781;
  --accent: #0969da;
  --border: #d0d7de;
  --code-bg: #f6f8fa;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
}

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

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--code-bg);
}

.header-inner,
.footer-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.site-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--fg);
}

.site-nav a {
  margin-left: 16px;
  color: var(--muted);
}

main {
  padding: 32px 0 56px;
}

.post-list {
  list-style: none;
  padding: 0;
}

.post-list li {
  margin-bottom: 14px;
}

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

h1, h2, h3 { line-height: 1.3; }

h1 { font-size: 1.9rem; }
h2 {
  margin-top: 2em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3em;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  overflow-x: auto;
  font-size: 0.9rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg);
  padding: 0.15em 0.35em;
  border-radius: 4px;
  font-size: 0.9em;
}

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

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
}

th, td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
}

th { background: var(--code-bg); }

blockquote {
  margin: 1em 0;
  padding: 0.2em 1em;
  border-left: 4px solid var(--border);
  color: var(--muted);
}

.product-shot {
  margin: 1.8rem 0;
}

.product-shot img {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  margin: 0 auto;
  border-radius: 14px;
}

.product-shot--portrait img {
  max-width: 360px;
}

.product-shot figcaption {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
  text-align: center;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 520px) {
  .header-inner,
  .footer-inner {
    flex-direction: column;
  }
  .site-nav a {
    margin-left: 0;
    margin-right: 16px;
  }
}