:root {
  --paper: #f7f3ea;
  --ink: #35302a;
  --ink-soft: #6f665a;
  --rule: #ddd4c4;
  --seal: #8c3b2e;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", "SimSun", Georgia, serif;
  font-size: 17px;
  line-height: 1.95;
  letter-spacing: .02em;
}

.wrap {
  max-width: 700px;
  margin: 0 auto;
  padding: 72px 28px 96px;
}

.masthead {
  text-align: center;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--rule);
}

.masthead h1 {
  margin: 0;
  font-size: 30px;
  font-weight: 600;
  letter-spacing: .34em;
  text-indent: .34em;
}

.masthead .sub {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: .22em;
  text-indent: .22em;
}

.intro {
  margin: 34px 0 44px;
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 2.05;
}

.year {
  font-size: 12.5px;
  color: var(--seal);
  letter-spacing: .3em;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

.entry {
  padding: 26px 0 24px;
  border-bottom: 1px solid var(--rule);
}

.entry h2 {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .04em;
}

.entry h2 a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}

.entry h2 a:hover { border-bottom-color: var(--seal); }

.date {
  margin: 0 0 10px;
  font-size: 12.5px;
  color: var(--ink-soft);
  letter-spacing: .16em;
}

.digest {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.95;
}

/* ---------- 单篇 ---------- */

.post-head {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 26px;
  margin-bottom: 34px;
}

.post-head h1 {
  margin: 0 0 10px;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: .05em;
  line-height: 1.6;
}

.post-head .date { margin: 0; }

.post p { margin: 0 0 1.35em; }

.poem {
  margin: 30px 0 32px;
  padding: 4px 0 4px 22px;
  border-left: 2px solid var(--seal);
  color: #2c2721;
  font-size: 17px;
  line-height: 2.25;
}

.poem span { display: block; }

.poem .title {
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: .12em;
  margin-bottom: 10px;
}

.post p.back { margin: 46px 0 0; }

a.back {
  display: inline-block;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  letter-spacing: .1em;
}

a.back:hover { color: var(--seal); }

footer {
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--rule);
  text-align: center;
  color: var(--ink-soft);
  font-size: 12.5px;
  letter-spacing: .1em;
}

footer p { margin: 14px 0 0; }

.seal {
  display: inline-block;
  padding: 3px 6px;
  border: 1px solid var(--seal);
  color: var(--seal);
  font-size: 11.5px;
  letter-spacing: .18em;
  line-height: 1.4;
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .wrap { padding: 48px 20px 72px; }
  .masthead h1 { font-size: 25px; letter-spacing: .24em; text-indent: .24em; }
  .post-head h1 { font-size: 20px; }
}