:root {
  --bg: #F7F4EE;
  --paper: #FFFFFF;
  --ink: #23302B;
  --muted: #6B746F;
  --line: #E4DED3;
  --accent: #2F5D50;
  --warm: #E0A458;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.8 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
.wrap { max-width: 820px; margin: 0 auto; padding: 0 20px; }

.top { position: sticky; top: 0; z-index: 10; background: rgba(247, 244, 238, .92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 600; font-size: 17px; }
.mark { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: var(--accent); color: #F4EFE6; font-size: 15px; }
.nav { display: flex; gap: 24px; }
.nav a { color: var(--ink); text-decoration: none; font-size: 15px; }
.nav a:hover { color: var(--accent); }

.hero { padding: 80px 0 56px; }
.eyebrow { margin: 0 0 10px; color: var(--accent); font-size: 14px; letter-spacing: .14em; }
.hero h1 { margin: 0 0 18px; font-size: 42px; line-height: 1.3; }
.lead { margin: 0 0 22px; color: var(--muted); font-size: 17px; max-width: 600px; }
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.tags li { padding: 4px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); font-size: 14px; color: var(--muted); }

.sec { padding: 48px 0 64px; }
.sec.alt { background: var(--paper); border-top: 1px solid var(--line); }
.sec h2 { margin: 0 0 22px; font-size: 24px; }

.posts { display: grid; gap: 16px; }
.post { padding: 22px 24px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); }
.meta { display: flex; align-items: center; gap: 12px; margin: 0 0 6px; font-size: 13px; color: var(--muted); }
.cat { padding: 1px 10px; border-radius: 999px; font-size: 12px; }
.c1 { background: #E3EEEA; color: var(--accent); }
.c2 { background: #EEE8F6; color: #5B4A86; }
.c3 { background: #F8EBDA; color: #8A5A1E; }
details summary { list-style: none; cursor: pointer; }
details summary::-webkit-details-marker { display: none; }
summary h3 { margin: 0 0 4px; font-size: 19px; }
summary p { margin: 0; color: var(--muted); font-size: 15px; }
summary:hover h3 { color: var(--accent); }
summary::after { content: "展开阅读 ↓"; display: inline-block; margin-top: 8px; font-size: 13px; color: var(--accent); }
details[open] summary::after { content: "收起 ↑"; }
.body { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line); }
.body p { margin: 0 0 10px; }

.about { display: flex; gap: 24px; align-items: flex-start; }
.avatar { flex: 0 0 72px; display: grid; place-items: center; width: 72px; height: 72px; border-radius: 50%; background: var(--accent); color: #F4EFE6; font-size: 28px; font-weight: 600; }
.about p { margin: 0 0 10px; }
.note { color: var(--muted); font-size: 14px; }
.mail { font-size: 15px; }

.foot { padding: 26px 0 30px; background: #1F2A26; color: #C9CFCB; text-align: center; font-size: 13px; }
.foot p { margin: 4px 0; }
.foot a { color: #C9CFCB; text-decoration: none; }
.foot a:hover { color: #fff; text-decoration: underline; }
.beian .sep { margin: 0 10px; opacity: .5; }
.police { display: inline-flex; align-items: center; gap: 4px; }
.police svg { color: var(--warm); }

@media (max-width: 640px) {
  .hero { padding: 48px 0 36px; }
  .hero h1 { font-size: 30px; }
  .lead { font-size: 15px; }
  .post { padding: 18px; }
  .about { flex-direction: column; gap: 14px; }
  .beian .sep { display: none; }
  .beian a { display: block; margin: 2px 0; }
  .police { justify-content: center; }
}