/* ---------------------------------------------------------------
   personal-site — 单文件样式表，无外部依赖
   改配色：改下面 :root 里的变量即可
   --------------------------------------------------------------- */

:root {
  --bg: #fbfaf7;
  --bg-soft: #f4f1ea;
  --text: #1e2024;
  --muted: #6a6f78;
  --line: #e4dfd5;
  --accent: #2b6a5e;
  --accent-soft: #e8f0ed;
  --radius: 14px;
  --wrap: 1040px;
  --prose: 720px;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --serif: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", STSong,
    Georgia, serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131518;
    --bg-soft: #1a1d21;
    --text: #e7e5e0;
    --muted: #9aa0a8;
    --line: #2a2e34;
    --accent: #6fb4a3;
    --accent-soft: #1e2b28;
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

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

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 22px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 9;
}

.skip:focus {
  left: 0;
}

/* ------------------------------------------------ 头部 */

.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  position: sticky;
  top: 0;
  backdrop-filter: saturate(140%) blur(8px);
  z-index: 5;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 64px;
}

.brand {
  font-family: var(--serif);
  font-size: 19px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.brand-handle {
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 15px;
  color: var(--muted);
  overflow-x: auto;
  scrollbar-width: none;
}

.nav::-webkit-scrollbar {
  display: none;
}

.nav a {
  padding: 6px 0;
  white-space: nowrap;
}

.nav a[aria-current="page"] {
  color: var(--text);
  box-shadow: inset 0 -2px 0 var(--accent);
}

/* ------------------------------------------------ 首屏 */

.hero {
  padding: 76px 0 58px;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(28px, 5.6vw, 44px);
  line-height: 1.3;
  font-weight: 600;
  margin: 0 0 14px;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 34em;
  font-size: 16.5px;
}

/* ------------------------------------------------ 区块 */

.section {
  margin: 56px 0;
}

.section h2 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.section h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* ------------------------------------------------ 栏目卡片 */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  color: inherit;
}

.card h3 {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  margin: 0;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.7;
  text-wrap: pretty;
}

.card .count {
  margin-top: auto;
  padding-top: 10px;
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------ 文章列表 */

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

.post-list li {
  border-bottom: 1px solid var(--line);
}

.post-list li:last-child {
  border-bottom: 0;
}

.post-list a {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 16px 0;
}

.post-list time {
  flex: 0 0 96px;
  font-size: 13.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.li-title {
  flex: 1;
  font-size: 16.5px;
}

.post-list a:hover .li-title {
  color: var(--accent);
}

.li-cat {
  flex: 0 0 auto;
  font-size: 12.5px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 10px;
}

/* ------------------------------------------------ 页头 / 空状态 */

.page-head {
  margin-bottom: 8px;
}

.page-head h1 {
  font-family: var(--serif);
  font-size: clamp(26px, 4.6vw, 34px);
  font-weight: 600;
  margin: 0 0 8px;
}

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

.empty {
  padding: 52px 24px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  text-align: center;
  color: var(--muted);
}

.empty p {
  margin: 0;
}

.empty-hint {
  font-size: 14px;
  margin-top: 6px !important;
  opacity: 0.8;
}

.year {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--muted);
  letter-spacing: 0.1em;
  margin: 34px 0 8px;
}

/* ------------------------------------------------ 正文 */

.prose {
  max-width: var(--prose);
}

.post-head h1 {
  font-family: var(--serif);
  font-size: clamp(25px, 4.6vw, 34px);
  line-height: 1.4;
  font-weight: 600;
  margin: 52px 0 12px;
}

.meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13.5px;
  margin-bottom: 34px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  font-variant-numeric: tabular-nums;
}

.tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 10px;
  font-size: 12.5px;
}

.prose h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  margin: 46px 0 14px;
  line-height: 1.5;
}

.prose h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 34px 0 10px;
}

.prose p {
  margin: 0 0 20px;
}

.prose ul,
.prose ol {
  margin: 0 0 20px;
  padding-left: 1.35em;
}

.prose li {
  margin: 7px 0;
}

.prose blockquote {
  margin: 0 0 20px;
  padding: 2px 0 2px 18px;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.prose blockquote p {
  margin: 0;
}

.prose code {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 0.1em 0.35em;
  border-radius: 5px;
  font-size: 0.88em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.prose pre {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0 0 22px;
  font-size: 14px;
  line-height: 1.75;
}

.prose pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  margin: 0 0 22px;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 38px 0;
}

.prose a {
  color: var(--accent);
  box-shadow: inset 0 -1px 0 currentColor;
}

.prose strong {
  font-weight: 600;
}

/* ------------------------------------------------ 上一篇/下一篇 */

.post-nav {
  max-width: var(--prose);
  margin: 56px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pn {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
}

.pn span {
  color: var(--muted);
  font-size: 13px;
  flex: 0 0 auto;
}

/* ------------------------------------------------ 页脚 */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 92px;
  padding: 26px 0 44px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin: 0 0 6px;
}

.footer-note {
  opacity: 0.75;
  font-size: 13px;
}

.beian {
  font-size: 13px;
  opacity: 0.8;
  font-variant-numeric: tabular-nums;
}

.beian a {
  box-shadow: inset 0 -1px 0 var(--line);
}

.beian a:hover {
  color: var(--accent);
  box-shadow: inset 0 -1px 0 currentColor;
}

.notfound h1 {
  font-size: clamp(52px, 12vw, 96px);
  font-family: var(--serif);
  line-height: 1;
  margin: 0 0 10px;
  color: var(--line);
}

.back {
  display: inline-block;
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 18px;
  font-size: 15px;
}

.back:hover {
  border-color: var(--accent);
}

/* ------------------------------------------------ 移动端 */

@media (max-width: 640px) {
  body {
    font-size: 16px;
    line-height: 1.8;
  }

  .site-header .wrap {
    min-height: 58px;
    gap: 12px;
  }

  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .card {
    padding: 16px 15px 14px;
  }

  .card h3 {
    font-size: 17px;
  }

  .card p {
    font-size: 13.5px;
  }

  .hero {
    padding: 52px 0 40px;
  }

  .hero h1 {
    font-size: 25px;
    line-height: 1.45;
    text-wrap: normal;
  }

  .section {
    margin: 42px 0;
  }

  .post-list a {
    flex-wrap: wrap;
    gap: 4px 12px;
    padding: 14px 0;
  }

  .post-list time {
    flex: 0 0 auto;
    order: 2;
  }

  .li-title {
    flex: 1 0 100%;
    order: 1;
    font-size: 16px;
  }

  .li-cat {
    order: 3;
  }

  .post-head h1 {
    margin-top: 38px;
  }
}

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