:root {
  --paper: #f6f1e6;
  --card: #fbf7ee;
  --ink: #2d2924;
  --ink-soft: #6f675b;
  --line: #ddd2bc;
  --seal: #9b3b2e;
  --night-bg: #211f1b;
  --night-card: #2b2823;
  --night-ink: #e8e1d2;
  --night-soft: #a49a88;
  --night-line: #45402f;
  --night-seal: #c96f56;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, "Noto Serif SC", "Songti SC", "SimSun", serif;
  line-height: 1.9;
  font-size: 17px;
}

.site-head {
  max-width: 740px;
  margin: 0 auto;
  padding: 54px 24px 8px;
  text-align: center;
}

.brand {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 14px;
}

.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 2px solid var(--seal);
  color: var(--seal);
  font-size: 18px;
  border-radius: 5px;
  transform: translateY(6px);
}

.seal-img {
  width: 34px;
  height: 34px;
  border-radius: 5px;
  image-rendering: pixelated;
  transform: translateY(6px);
}

h1 {
  font-size: 34px;
  letter-spacing: 10px;
  font-weight: 600;
  margin: 0;
}

.tagline {
  color: var(--ink-soft);
  font-size: 15px;
  letter-spacing: 2px;
  margin: 14px 0 26px;
}

.domain {
  color: var(--ink-soft);
  font-size: 13px;
  letter-spacing: 3px;
  margin: -18px 0 24px;
}

nav {
  display: flex;
  gap: 28px;
  justify-content: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}

nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 15px;
  letter-spacing: 2px;
}

nav a:hover,
nav a.current {
  color: var(--seal);
}

main {
  max-width: 740px;
  margin: 0 auto;
  padding: 36px 24px 60px;
}

article.post {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 28px 32px;
  margin-bottom: 34px;
  box-shadow: 0 1px 0 rgba(45, 41, 36, 0.05);
}

.post .meta {
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 1px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.post h2 {
  margin: 12px 0 6px;
  font-size: 24px;
  letter-spacing: 2px;
}

.post .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 16px;
}

.post .tags span {
  font-size: 12px;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 2px 12px;
  color: var(--ink-soft);
}

.post p {
  margin: 0 0 14px;
}

.post blockquote {
  margin: 18px 0 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--seal);
  color: var(--ink-soft);
  font-size: 15px;
}

/* ---------- 列表卡片 ---------- */

article.post-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 24px 30px;
  margin-bottom: 26px;
  box-shadow: 0 1px 0 rgba(45, 41, 36, 0.05);
}

.post-card .meta {
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 1px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
}

.post-card h2 {
  margin: 10px 0 4px;
  font-size: 22px;
  letter-spacing: 2px;
}

.post-card h2 a {
  color: var(--ink);
  text-decoration: none;
}

.post-card h2 a:hover {
  color: var(--seal);
}

.post-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 12px;
}

.post-card .tags span {
  font-size: 12px;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 2px 12px;
  color: var(--ink-soft);
}

.post-card .summary {
  color: var(--ink-soft);
  font-size: 15px;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card .read-more {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--seal);
  text-decoration: none;
  letter-spacing: 1px;
}

.post-card .read-more:hover {
  text-decoration: underline;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-top: 10px;
  font-size: 14px;
  letter-spacing: 1px;
  color: var(--ink-soft);
}

.pagination a {
  color: var(--seal);
  text-decoration: none;
}

.pagination a:hover {
  text-decoration: underline;
}

.badge {
  font-size: 12px;
  border: 1px solid var(--seal);
  color: var(--seal);
  border-radius: 20px;
  padding: 2px 10px;
}

.post.single h2 {
  margin-top: 14px;
  font-size: 28px;
}

.about-body p {
  margin: 0 0 16px;
}

.about-body .sig {
  text-align: right;
  color: var(--ink-soft);
  margin-top: 26px;
}

footer {
  max-width: 740px;
  margin: 0 auto;
  padding: 20px 24px 48px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 13px;
  letter-spacing: 1px;
  border-top: 1px solid var(--line);
}

/* ---------- 里侧：夜色 ---------- */

body.night {
  background: var(--night-bg);
  color: var(--night-ink);
}

body.night .tagline,
body.night .domain,
body.night nav a {
  color: var(--night-soft);
}

body.night nav {
  border-color: var(--night-line);
}

body.night nav a:hover,
body.night nav a.current {
  color: var(--night-seal);
}

body.night .seal {
  border-color: var(--night-seal);
  color: var(--night-seal);
}

body.night article.post {
  background: var(--night-card);
  border-color: var(--night-line);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.3);
}

body.night article.post-card {
  background: var(--night-card);
  border-color: var(--night-line);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.3);
}

body.night .post .meta,
body.night .post blockquote,
body.night .post .tags span,
body.night footer {
  color: var(--night-soft);
}

body.night .post-card .meta,
body.night .post-card .summary,
body.night .post-card .tags span {
  color: var(--night-soft);
}

body.night .post .tags span {
  border-color: var(--night-line);
}

body.night .post-card .tags span {
  border-color: var(--night-line);
}

body.night .post-card h2 a {
  color: var(--night-ink);
}

body.night .post-card h2 a:hover {
  color: var(--night-seal);
}

body.night .post-card .read-more {
  color: var(--night-seal);
}

body.night .pagination {
  color: var(--night-soft);
}

body.night .pagination a {
  color: var(--night-seal);
}

body.night .badge {
  border-color: var(--night-seal);
  color: var(--night-seal);
}

body.night .post blockquote {
  border-left-color: var(--night-seal);
}

body.night footer {
  border-top-color: var(--night-line);
}

/* ---------- 管理手册 ---------- */

.manual h2 {
  margin-top: 42px;
  letter-spacing: 3px;
  font-size: 21px;
}

.manual ul,
.manual ol {
  padding-left: 22px;
}

.manual li {
  margin-bottom: 8px;
}

code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
  background: rgba(0, 0, 0, 0.05);
  padding: 1px 5px;
  border-radius: 3px;
}

body.night code {
  background: rgba(255, 255, 255, 0.08);
}

pre.tree {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 14px 18px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.7;
  font-family: Consolas, "Courier New", monospace;
}

body.night pre.tree {
  background: var(--night-card);
  border-color: var(--night-line);
}

table.ledger {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 18px 0;
}

table.ledger th,
table.ledger td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

body.night table.ledger th,
body.night table.ledger td {
  border-color: var(--night-line);
}