/* ============================================
   Lilso Blog — 站点样式
   风格：暖色纸张 / 编辑排版 / 克制的陶土红点缀
   ============================================ */

:root {
  --paper: #faf8f4;
  --surface: #fffefa;
  --ink: #1f1d1a;
  --ink-soft: #45403a;
  --muted: #8b8478;
  --line: #e8e2d7;
  --line-soft: #f0ebe2;
  --accent: #a8452b;
  --accent-soft: #f4e6e0;
  --code-bg: #f3efe7;
  --max: 768px;
  --sans: "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --serif: Georgia, "Times New Roman", "Songti SC", "STSong", "SimSun",
    "Noto Serif SC", serif;
  --mono: "SF Mono", Consolas, "Cascadia Mono", "Roboto Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161514;
    --surface: #1c1b18;
    --ink: #ece7dd;
    --ink-soft: #c8c2b6;
    --muted: #8f887c;
    --line: #2e2b26;
    --line-soft: #242220;
    --accent: #e08264;
    --accent-soft: #33231d;
    --code-bg: #211f1c;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { font: inherit; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  z-index: 100;
}
.skip:focus { left: 12px; top: 12px; }

/* 阅读进度条 */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  z-index: 60;
  transition: width 0.1s linear;
}

/* ---------- 顶栏 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  height: 62px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.brand-mark {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  border-radius: 3px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
}

.nav {
  margin-left: auto;
  display: flex;
  gap: 4px;
  font-size: 14.5px;
}

.nav a {
  padding: 6px 10px;
  border-radius: 4px;
  color: var(--muted);
  transition: color 0.16s, background 0.16s;
}
.nav a:hover { color: var(--ink); background: var(--line-soft); }
.nav a.is-active { color: var(--ink); font-weight: 600; }

.nav-search {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 4px;
  color: var(--muted);
  transition: color 0.16s, background 0.16s;
}
.nav-search:hover { color: var(--ink); background: var(--line-soft); }

/* ---------- 主体 ---------- */
.main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 80px;
  min-height: 60vh;
}

/* ---------- 首页 Hero ---------- */
.hero {
  padding: 72px 0 44px;
  animation: rise 0.5s ease both;
}

.hero-title {
  font-family: var(--serif);
  font-size: 52px;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 16px;
  font-weight: 600;
}

.hero-sub {
  margin: 0;
  font-size: 17px;
  color: var(--muted);
  max-width: 34em;
  line-height: 1.75;
}

.hero-rule {
  margin-top: 40px;
  height: 1px;
  background: linear-gradient(to right, var(--ink) 0, var(--ink) 48px, var(--line) 48px, var(--line) 100%);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 文章列表 ---------- */
.list { display: flex; flex-direction: column; }

.entry {
  padding: 34px 0 30px;
  border-bottom: 1px solid var(--line-soft);
  animation: rise 0.5s ease both;
}

.entry-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.entry-head .sep { opacity: 0.5; }

.pin {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 7px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 2px;
}

.entry-title {
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.4;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -0.005em;
}

.entry-title a {
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0 1.5px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.28s ease, color 0.18s;
}
.entry-title a:hover { color: var(--accent); background-size: 100% 1.5px; }

.entry-summary {
  margin: 0 0 14px;
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.78;
  max-width: 46em;
}

.entry-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  font-size: 12.5px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 3px;
  transition: all 0.16s;
  background: transparent;
}
.tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}
.tag-count {
  font-size: 10.5px;
  opacity: 0.65;
  font-variant-numeric: tabular-nums;
}

.tagcloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 32px 0 8px;
  border-top: 1px solid var(--line);
  margin-top: 24px;
}
.tagcloud.is-large { padding: 8px 0; border: 0; margin-top: 0; gap: 10px; }
.tagcloud.is-large .tag { font-size: 14px; padding: 6px 14px; }

/* ---------- 分页 ---------- */
.pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 36px 0 0;
  font-size: 14px;
}

.pager-link {
  padding: 8px 0;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 0.16s, border-color 0.16s;
}
.pager-link:hover { color: var(--accent); border-color: var(--accent); }
.pager-link.is-disabled { color: var(--line); pointer-events: none; }

.pager-info {
  color: var(--muted);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
}

/* ---------- 文章详情 ---------- */
.post { padding-top: 56px; animation: rise 0.45s ease both; }

.post-head { margin-bottom: 36px; }

.post-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  margin-bottom: 18px;
}
.post-meta .sep { opacity: 0.5; }

.post-title {
  font-family: var(--serif);
  font-size: 42px;
  line-height: 1.28;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
}

.post-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.post-cover {
  width: 100%;
  border-radius: 4px;
  margin-bottom: 40px;
  border: 1px solid var(--line);
}

/* 正文排版 */
.prose {
  font-size: 17px;
  line-height: 1.95;
  color: var(--ink-soft);
  word-break: break-word;
}

.prose > * + * { margin-top: 1.25em; }

.prose h2 {
  font-family: var(--serif);
  font-size: 25px;
  line-height: 1.45;
  color: var(--ink);
  margin: 2.2em 0 0.7em;
  font-weight: 600;
  letter-spacing: -0.005em;
  scroll-margin-top: 80px;
}

.prose h3 {
  font-size: 19.5px;
  line-height: 1.5;
  color: var(--ink);
  margin: 1.9em 0 0.6em;
  font-weight: 600;
}

.prose h4 { font-size: 17px; color: var(--ink); margin: 1.6em 0 0.5em; }

.prose p { margin: 0; }

.prose a {
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 0.5px;
  transition: color 0.16s, background 0.16s;
}
.prose a:hover { color: var(--accent); background: var(--accent-soft); }

.prose strong { color: var(--ink); font-weight: 600; }
.prose em { font-style: italic; }

.prose ul, .prose ol { margin: 1.2em 0; padding-left: 1.4em; }
.prose li { margin: 0.4em 0; }
.prose li::marker { color: var(--muted); }

.prose blockquote {
  margin: 1.8em 0;
  padding: 2px 0 2px 22px;
  border-left: 2px solid var(--accent);
  color: var(--muted);
  font-size: 16.5px;
}
.prose blockquote p + p { margin-top: 0.9em; }

.prose hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 2.8em 0;
}

.prose img {
  border-radius: 4px;
  margin: 1.8em 0;
  border: 1px solid var(--line);
}

.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--code-bg);
  padding: 2px 5px;
  border-radius: 3px;
  color: var(--accent);
  border: 1px solid var(--line-soft);
}

.prose pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.7;
  margin: 1.7em 0;
}

.prose pre code {
  background: none;
  border: 0;
  padding: 0;
  color: var(--ink);
  font-size: inherit;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 1.7em 0;
  display: block;
  overflow-x: auto;
}
.prose th, .prose td {
  border: 1px solid var(--line);
  padding: 9px 13px;
  text-align: left;
}
.prose th { background: var(--code-bg); font-weight: 600; color: var(--ink); }

.post-foot {
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 36px 0 28px;
}

.post-nav-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 5px;
  transition: border-color 0.18s, background 0.18s;
  min-height: 76px;
}
.post-nav-item:hover { border-color: var(--line-strong, #d5cec1); background: var(--surface); }
.post-nav-item.is-next { text-align: right; align-items: flex-end; }

.post-nav-label {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.post-nav-title {
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.45;
  color: var(--ink);
}

.back-link {
  font-size: 14px;
  color: var(--muted);
  transition: color 0.16s;
}
.back-link:hover { color: var(--accent); }

.back-line { margin-top: 36px; }

/* ---------- 通用页头 ---------- */
.page-head { padding: 64px 0 32px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }

.page-kicker {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-title {
  font-family: var(--serif);
  font-size: 38px;
  line-height: 1.25;
  font-weight: 600;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.page-sub { margin: 0; color: var(--muted); font-size: 14.5px; }

.list-head { padding: 56px 0 24px; }
.list-title { font-family: var(--serif); font-size: 30px; margin: 0; font-weight: 600; }

/* ---------- 归档 ---------- */
.archive { padding-top: 20px; }

.archive-year { padding: 26px 0; border-bottom: 1px solid var(--line-soft); }

.archive-year-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 14px;
  color: var(--ink);
}

.archive-count {
  font-family: var(--sans);
  font-size: 11.5px;
  color: var(--muted);
  background: var(--line-soft);
  padding: 1px 7px;
  border-radius: 10px;
  font-variant-numeric: tabular-nums;
}

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

.archive-list li { border-bottom: 1px dotted var(--line); }
.archive-list li:last-child { border-bottom: 0; }

.archive-list a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 10px 2px;
  transition: background 0.14s;
}
.archive-list a:hover { background: var(--surface); }

.archive-date {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  width: 46px;
}

.archive-title { font-size: 15.5px; color: var(--ink-soft); transition: color 0.16s; }
.archive-list a:hover .archive-title { color: var(--accent); }

/* ---------- 关于 ---------- */
.about { padding-top: 60px; }

.about-head {
  display: flex;
  gap: 26px;
  align-items: flex-start;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 36px;
}

.about-avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--line);
}

.about-avatar.is-placeholder {
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 34px;
}

.about-name {
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 600;
  margin: 4px 0 8px;
}

.about-bio { margin: 0 0 14px; color: var(--muted); font-size: 15.5px; }

.about-links { display: flex; flex-wrap: wrap; gap: 8px; }
.about-links a {
  font-size: 13px;
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--ink-soft);
  transition: all 0.16s;
}
.about-links a:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* ---------- 搜索 ---------- */
.search-form {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  max-width: 460px;
}

.search-form input {
  flex: 1;
  padding: 10px 14px;
  font-size: 15px;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  outline: none;
  transition: border-color 0.16s;
}
.search-form input:focus { border-color: var(--accent); }

.search-form button {
  padding: 10px 20px;
  font-size: 14px;
  color: var(--paper);
  background: var(--ink);
  border: 0;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.16s;
}
.search-form button:hover { background: var(--accent); }

/* ---------- 空状态 / 404 ---------- */
.empty { padding: 60px 0; text-align: center; color: var(--muted); font-size: 15px; }
.empty p { margin: 6px 0; }
.empty-hint { font-size: 13.5px; color: var(--line-strong, #cfc7b8); }
.empty a { color: var(--accent); border-bottom: 1px solid currentColor; }

.notfound { padding: 110px 0; text-align: center; }
.notfound-code {
  font-family: var(--serif);
  font-size: 76px;
  line-height: 1;
  margin: 0 0 18px;
  color: var(--line-strong, #ddd6c8);
  letter-spacing: 0.02em;
}
.notfound-text { margin: 0 0 26px; color: var(--muted); font-size: 15.5px; }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 34px 24px 28px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
}

.footer-name {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-size: 15px;
  color: var(--ink);
}

.footer-note { margin: 0; font-size: 12.5px; color: var(--muted); }

.footer-right { display: flex; gap: 16px; font-size: 12.5px; color: var(--muted); }
.footer-right a { transition: color 0.16s; }
.footer-right a:hover { color: var(--accent); }

.footer-icp {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 26px;
  font-size: 12px;
  color: var(--muted);
}
.footer-icp a:hover { color: var(--accent); }
.footer-icp img { display: inline-block; width: auto; height: 16px; margin-right: 4px; vertical-align: -3px; }
.footer-icp .soul-foot-sep { display: none; }
.footer-icp .beian-police { display: block; margin-top: 2px; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .header-inner { height: 56px; padding: 0 18px; gap: 10px; }
  .brand-text { display: none; }
  .nav { gap: 0; }
  .nav a { padding: 6px 8px; font-size: 14px; }
  .main { padding: 0 18px 60px; }
  .hero { padding: 48px 0 32px; }
  .hero-title { font-size: 36px; }
  .hero-sub { font-size: 15.5px; }
  .entry { padding: 26px 0 24px; }
  .entry-title { font-size: 21px; }
  .entry-summary { font-size: 14.5px; }
  .post { padding-top: 36px; }
  .post-title { font-size: 29px; }
  .prose { font-size: 16px; line-height: 1.9; }
  .prose h2 { font-size: 21px; }
  .prose h3 { font-size: 18px; }
  .prose pre { padding: 14px 15px; font-size: 12.5px; margin-left: -18px; margin-right: -18px; border-radius: 0; border-left: 0; border-right: 0; }
  .page-head { padding: 42px 0 24px; }
  .page-title { font-size: 29px; }
  .about { padding-top: 40px; }
  .about-head { flex-direction: column; gap: 16px; }
  .about-avatar { width: 66px; height: 66px; }
  .about-name { font-size: 24px; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-item.is-next { text-align: left; align-items: flex-start; }
  .footer-inner { flex-direction: column; gap: 14px; padding: 28px 18px 22px; }
  .notfound { padding: 70px 0; }
  .notfound-code { font-size: 58px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- 图片加载失败占位 ---------- */
.img-broken {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 1.8em 0;
  padding: 16px 18px;
  border: 1px dashed var(--line);
  border-radius: 6px;
  background: var(--code-bg);
  color: var(--muted);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.5;
}
.img-broken-icon { font-size: 20px; opacity: .55; flex: none; }
.img-broken-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.img-broken-text strong {
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 13px;
  word-break: break-word;
}
.img-broken-hint { font-size: 12px; color: var(--muted); }

/* 数学公式（KaTeX 服务端渲染） */
.math-block {
  margin: 1.1em 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  padding: 2px 0;
}
.math-block .katex-display { margin: 0; }

/* 表格单元格里的公式不折行 */
.table-wrap .katex { white-space: nowrap; }