:root {
  --bg: #f2f0eb;
  --paper: #fbfaf7;
  --ink: #1f1e1b;
  --muted: #666158;
  --line: #d8d2c5;
  --line-strong: #b9b2a4;
  --accent: #4f4c45;
  --accent-soft: #ebe7de;
  --quote: #f0ece4;
  --shadow: 0 18px 42px rgba(32, 30, 25, 0.08);
  --radius: 16px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "IBM Plex Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  line-height: 1.78;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.35), transparent 35%),
    repeating-linear-gradient(
      90deg,
      rgba(120, 110, 90, 0.045) 0,
      rgba(120, 110, 90, 0.045) 1px,
      transparent 1px,
      transparent 26px
    ),
    var(--bg);
}

.container {
  width: min(1040px, 92vw);
  margin: 0 auto;
  padding: 30px 0 64px;
}

.page-header {
  position: relative;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding: 20px 0 18px;
  margin-bottom: 26px;
}

.page-header h1 {
  margin: 0;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.02;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-header .subtitle {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 56ch;
  font-size: 15px;
}

.top-nav,
.back-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin-top: 16px;
}

.back-nav {
  margin: 2px 0 20px;
}

.top-nav a,
.back-nav a,
.page-btn,
.page-num,
.chip {
  text-decoration: none;
  color: var(--accent);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  border-radius: 999px;
  padding: 7px 13px;
  font-size: 13px;
  font-weight: 600;
  transition: background-color 160ms var(--ease), border-color 160ms var(--ease), transform 160ms var(--ease);
}

.top-nav a:hover,
.back-nav a:hover,
.page-btn:hover,
.page-num:hover,
.chip:hover,
.top-nav a:focus-visible,
.back-nav a:focus-visible,
.page-btn:focus-visible,
.page-num:focus-visible,
.chip:focus-visible {
  background: #fff;
  border-color: var(--line-strong);
  transform: translateY(-1px);
  outline: none;
}

body.page-home .top-nav a:nth-child(1),
body.page-home .back-nav a:nth-child(1),
body.page-tags .top-nav a:nth-child(2),
body.page-tags .back-nav a:nth-child(2),
body.page-archives .top-nav a:nth-child(3),
body.page-archives .back-nav a:nth-child(3),
body.page-search .top-nav a:nth-child(4),
body.page-search .back-nav a:nth-child(4) {
  background: var(--accent-soft);
  border-color: var(--line-strong);
}

.post-list,
.archive-list {
  display: grid;
  gap: 14px;
}

.post-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.post-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(170deg, #fff, var(--paper));
  box-shadow: var(--shadow);
  padding: 18px 18px 16px;
  transition: transform 190ms var(--ease), box-shadow 190ms var(--ease), border-color 190ms var(--ease);
}

.post-card::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 0;
  width: 88px;
  height: 1px;
  background: var(--line-strong);
}

.post-card-link:hover .post-card,
.post-card-link:focus-visible .post-card {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 22px 38px rgba(28, 25, 20, 0.13);
}

.post-card h2 {
  margin: 0;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.meta {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 11px 0 0;
}

.tags span,
.tag-link {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--accent-soft);
  color: #4f493f;
  padding: 0 9px;
  font-size: 11px;
  text-decoration: none;
}

.tag-link:hover {
  background: #e3ddd1;
}

.post-detail {
  border-top: 1px solid var(--line-strong);
  padding-top: 18px;
}

.post-detail h1 {
  margin: 0;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.15;
}

.content {
  margin-top: 20px;
  max-width: 72ch;
  font-size: clamp(16px, 1.95vw, 19px);
}

.content h1,
.content h2,
.content h3,
.content h4,
.content h5,
.content h6 {
  margin-top: 30px;
  margin-bottom: 12px;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  line-height: 1.22;
}

.content p {
  margin: 12px 0;
}

.content img,
.content video,
.content svg {
  max-width: 100%;
  height: auto;
}

.content p > img:only-child,
.content p > .md-image:only-child img,
.content figure > img:first-child:last-child {
  display: block;
  margin: 16px auto;
}

.content figure {
  margin: 18px 0;
}

.content ul,
.content ol {
  margin: 10px 0 12px 24px;
}

.content li > p {
  margin: 8px 0;
}

.content li > :first-child {
  margin-top: 0;
}

.content li > :last-child {
  margin-bottom: 0;
}

.content li > ul,
.content li > ol {
  margin-top: 8px;
  margin-bottom: 8px;
}

.content blockquote {
  margin: 16px 0;
  border-left: 3px solid var(--line-strong);
  background: var(--quote);
  border-radius: 0 12px 12px 0;
  padding: 10px 14px;
  color: #4e4a43;
}

.content :not(pre) > code {
  background: #ece7df;
  color: #3e3a33;
  border-radius: 6px;
  padding: 1px 5px;
  font-family: Consolas, Monaco, monospace;
  font-size: 90%;
}

.content pre {
  background: #1f1f1c;
  color: #efede6;
  border-radius: 12px;
  padding: 14px;
  overflow-x: auto;
}

.content pre code {
  display: block;
  white-space: pre;
  background: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

.content a,
.archive-group li a {
  color: #2d2a24;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.references {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.references h2 {
  margin: 0 0 10px;
}

.references ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.references li {
  margin: 8px 0;
}

.reference-label {
  color: var(--muted);
  margin-right: 8px;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 2px 0 16px;
}

.chip.active,
.page-num.current {
  background: #2f2d28;
  color: #f6f4ef;
  border-color: #2f2d28;
}

.archive-group {
  border-bottom: 1px solid var(--line);
  padding: 12px 0 14px;
}

.archive-group h2 {
  margin: 0 0 8px;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-size: 20px;
}

.archive-group ul {
  margin: 0;
  padding-left: 18px;
}

.archive-group li {
  margin: 6px 0;
}

.search-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(170deg, #fff, var(--paper));
  box-shadow: var(--shadow);
  padding: 18px;
}

.search-input {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #fff;
  padding: 11px 12px;
  font-size: 15px;
  margin-bottom: 10px;
  outline: none;
}

.search-input:focus {
  border-color: #8f8777;
  box-shadow: 0 0 0 3px rgba(76, 71, 60, 0.14);
}

.snippet {
  margin-top: 9px;
}

mark {
  background: #dcd6c8;
  color: inherit;
  border-radius: 4px;
  padding: 0 2px;
}

.pagination {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.page-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 7px;
}

.page-btn.disabled {
  color: #928c80;
  border-color: #d9d4ca;
  background: #f2eee6;
}

.comments {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.empty {
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
  background: #f8f5ef;
  color: var(--muted);
  padding: 14px;
}

@media (max-width: 760px) {
  .container {
    width: min(700px, 94vw);
    padding-top: 22px;
  }

  .page-header {
    padding-top: 16px;
  }

  .page-header h1 {
    font-size: clamp(30px, 12vw, 46px);
  }

  .post-card h2 {
    font-size: clamp(20px, 8vw, 26px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}