:root {
  --bg: #fbfbf8;
  --panel: #ffffff;
  --text: #24272b;
  --muted: #676d76;
  --line: #e5e3dc;
  --accent: #2f5d8a;
  --accent-soft: #eaf1f7;
  --maxw: 44rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --panel: #1d2024;
    --text: #dfe3e8;
    --muted: #9aa3ad;
    --line: #2c3137;
    --accent: #7fb0d8;
    --accent-soft: #222c35;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.8;
  word-break: break-word;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

a:hover {
  border-bottom-color: currentColor;
}

code,
kbd,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88em;
}

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

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- site header ---------- */

.site-head {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.site-head .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--text);
  border-bottom: none;
}

.brand:hover {
  border-bottom: none;
}

.brand .dot {
  color: var(--accent);
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  border-bottom: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--accent);
}

/* ---------- hero ---------- */

.hero {
  padding: 2.75rem 0 1.5rem;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 1.7rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.hero .lede {
  margin: 0;
  color: var(--muted);
}

.hero .meta {
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--muted);
}

/* ---------- sections ---------- */

section {
  padding: 1.5rem 0;
}

.section-title {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin: 0 0 1rem;
  font-size: 1.12rem;
  font-weight: 700;
}

.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.section-title .more {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--muted);
  order: 3;
}

/* ---------- page title block ---------- */

.page-head {
  padding: 2.5rem 0 0.5rem;
}

.page-head h1 {
  margin: 0 0 0.5rem;
  font-size: 1.55rem;
  line-height: 1.4;
}

.page-head .lede {
  margin: 0;
  color: var(--muted);
}

/* ---------- card / post list ---------- */

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

.post-list > li {
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}

.post-list > li:last-child {
  border-bottom: none;
}

.post-list h3 {
  margin: 0 0 0.3rem;
  font-size: 1.06rem;
  line-height: 1.5;
}

.post-list h3 a {
  color: var(--text);
  border-bottom: none;
}

.post-list h3 a:hover {
  color: var(--accent);
  border-bottom: none;
}

.post-list .excerpt {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.post-list .meta,
.post-meta {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.83rem;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.grid li {
  padding: 1rem 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.grid li h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.grid li p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.grid li a {
  color: var(--text);
  border-bottom: none;
}

/* ---------- tags ---------- */

.tag {
  display: inline-block;
  margin: 0 0.35rem 0.35rem 0;
  padding: 0.1rem 0.55rem;
  font-size: 0.8rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  border-bottom: none;
}

/* ---------- article ---------- */

.article {
  padding: 2.25rem 0 1rem;
}

.article > h1 {
  margin: 0 0 0.4rem;
  font-size: 1.75rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.crumbs {
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.prose h2 {
  margin: 2.1rem 0 0.6rem;
  font-size: 1.22rem;
  line-height: 1.5;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--line);
}

.prose h3 {
  margin: 1.6rem 0 0.4rem;
  font-size: 1.05rem;
}

.prose p {
  margin: 0 0 1rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

.prose li {
  margin: 0.3rem 0;
}

.prose strong {
  font-weight: 700;
}

.prose code {
  padding: 0.1rem 0.35rem;
  background: var(--accent-soft);
  border-radius: 4px;
}

.prose pre {
  margin: 0 0 1.15rem;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  line-height: 1.65;
}

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

.prose blockquote {
  margin: 0 0 1.1rem;
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

.prose table {
  width: 100%;
  margin: 0 0 1.15rem;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.prose th,
.prose td {
  padding: 0.5rem 0.6rem;
  text-align: left;
  border: 1px solid var(--line);
}

.prose th {
  background: var(--panel);
  font-weight: 600;
}

.prose hr {
  margin: 2rem 0;
  border: none;
  border-top: 1px solid var(--line);
}

.note {
  margin: 0 0 1.15rem;
  padding: 0.85rem 1rem;
  background: var(--accent-soft);
  border-radius: 8px;
  font-size: 0.95rem;
}

.note strong {
  color: var(--accent);
}

/* ---------- article footer nav ---------- */

.pager {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  margin: 2.25rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
}

.pager .next {
  margin-left: auto;
}

/* ---------- archive table ---------- */

.archive-year {
  margin: 1.75rem 0 0.4rem;
  font-size: 1rem;
  color: var(--accent);
}

.archive-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.archive-list li {
  display: flex;
  gap: 1rem;
  padding: 0.4rem 0;
  font-size: 0.95rem;
}

.archive-list time {
  flex: none;
  width: 5.5rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.88rem;
}

/* ---------- site footer ---------- */

.site-foot {
  margin-top: 2.5rem;
  padding: 1.75rem 0 2.25rem;
  border-top: 1px solid var(--line);
  background: var(--panel);
  font-size: 0.85rem;
  color: var(--muted);
}

.site-foot p {
  margin: 0 0 0.45rem;
}

.site-foot p:last-child {
  margin-bottom: 0;
}

.site-foot a {
  color: var(--muted);
}

.site-foot a:hover {
  color: var(--accent);
}


/* 备案信息（2026-10-29 加）：默认隐藏，填了备案号之后才显示 */
.site-foot .beian,
.site-foot .beian-police {
  font-size: 0.8rem;
  line-height: 1.7;
}
.site-foot .beian a,
.site-foot .beian-police a {
  text-decoration: none;
  border-bottom: 1px dotted currentColor;
}
.site-foot .beian a:hover,
.site-foot .beian-police a:hover {
  color: var(--accent);
  border-bottom-style: solid;
}

/* ---------- misc ---------- */

.pill {
  display: inline-block;
  padding: 0.1rem 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.empty {
  padding: 2rem 0;
  color: var(--muted);
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: 0.4rem 0.8rem;
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: 6px;
}

::selection {
  background: var(--accent);
  color: #fff;
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .site-head .wrap {
    padding-top: 0.9rem;
    padding-bottom: 0.9rem;
  }

  .site-nav {
    margin-left: 0;
  }

  .hero h1 {
    font-size: 1.45rem;
  }

  .article > h1 {
    font-size: 1.45rem;
  }

  .archive-list li {
    flex-direction: column;
    gap: 0.1rem;
  }

  .archive-list time {
    width: auto;
  }
}