:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #1f2328;
  --muted: #667085;
  --border: rgba(16, 24, 40, 0.12);
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 6px 24px rgba(16, 24, 40, 0.06);
  --shadow-hover: 0 1px 2px rgba(16, 24, 40, 0.06), 0 10px 34px rgba(16, 24, 40, 0.12);
  --link: #2563eb;
  --link-hover: #1d4ed8;
  --radius: 14px;
  --container: 860px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --panel: #111827;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --border: rgba(255, 255, 255, 0.14);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 10px 30px rgba(0, 0, 0, 0.45);
    --shadow-hover: 0 1px 2px rgba(0, 0, 0, 0.5), 0 14px 44px rgba(0, 0, 0, 0.6);
    --link: #60a5fa;
    --link-hover: #93c5fd;
  }
}

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

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

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.65;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(37, 99, 235, 0.14), transparent 60%),
    radial-gradient(1200px 600px at 100% 0%, rgba(139, 92, 246, 0.12), transparent 55%),
    var(--bg);
  color: var(--text);
}

a {
  color: var(--link);
  text-decoration: none;
  text-underline-offset: 3px;
}
a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 18px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--panel) 82%, transparent);
  border-bottom: 1px solid var(--border);
  padding: 18px 0 14px;
}

.site-title {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.2px;
}

.site-subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.site-nav {
  margin-top: 12px;
}

.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-item a {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.nav-item a:hover {
  text-decoration: none;
  background: color-mix(in oklab, var(--panel) 78%, transparent);
  border-color: var(--border);
  color: var(--text);
  transform: translateY(-1px);
}

.nav-item a.is-active,
.nav-item a[aria-current="page"] {
  background: color-mix(in oklab, var(--link) 14%, var(--panel));
  border-color: color-mix(in oklab, var(--link) 26%, var(--border));
  color: var(--text);
}

.site-main {
  margin-top: 22px;
  margin-bottom: 44px;
}

.post-item {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 18px 18px 16px;
  margin-bottom: 14px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.post-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.post-title {
  margin: 0 0 8px;
  line-height: 1.25;
}

.post-title a {
  color: inherit;
  text-decoration: none;
}

.post-title a:hover {
  text-decoration: underline;
}

.post-meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 12px;
}

.post-excerpt {
  margin: 0 0 12px;
  color: color-mix(in oklab, var(--text) 82%, var(--muted));
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.post-more:hover {
  text-decoration: none;
}

.post {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 22px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.post-content {
  font-size: 16px;
}

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

.post-content h2,
.post-content h3,
.post-content h4 {
  scroll-margin-top: 92px;
}

.post-content h2 {
  margin: 28px 0 10px;
  font-size: 20px;
}

.post-content h3 {
  margin: 22px 0 8px;
  font-size: 17px;
}

.post-content p {
  margin: 12px 0;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.post-content blockquote {
  margin: 16px 0;
  padding: 10px 14px;
  border-left: 3px solid color-mix(in oklab, var(--link) 65%, var(--border));
  background: color-mix(in oklab, var(--panel) 84%, transparent);
  color: color-mix(in oklab, var(--text) 88%, var(--muted));
  border-radius: 10px;
}

.post-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
  padding: 0.15em 0.35em;
  border-radius: 8px;
  background: color-mix(in oklab, var(--panel) 78%, transparent);
  border: 1px solid var(--border);
}

.post-content pre {
  overflow: auto;
  padding: 14px 16px;
  border-radius: 14px;
  background: color-mix(in oklab, var(--panel) 70%, transparent);
  border: 1px solid var(--border);
}

.post-content pre code {
  padding: 0;
  border: 0;
  background: transparent;
}

.post-content hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 22px 0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.post-content th,
.post-content td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.post-content th {
  text-align: left;
  color: var(--muted);
  background: color-mix(in oklab, var(--panel) 78%, transparent);
}

.post-nav {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-size: 13px;
}

.post-prev,
.post-next {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel) 84%, transparent);
  text-decoration: none;
}

.post-next {
  text-align: right;
}

.archive .post-title,
.tag-page .post-title {
  margin-bottom: 14px;
}

.tag-page ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-page li a {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel) 84%, transparent);
  color: var(--text);
  text-decoration: none;
}

.tag-page li a:hover {
  background: color-mix(in oklab, var(--link) 14%, var(--panel));
  border-color: color-mix(in oklab, var(--link) 26%, var(--border));
}

.site-footer {
  padding: 34px 0 40px;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 640px) {
  .site-title {
    font-size: 20px;
  }

  .post {
    padding: 18px;
  }

  .post-nav {
    grid-template-columns: 1fr;
  }
}

/* ====== 首页 Hero 区 ====== */

.home-hero {
  margin-bottom: 18px;
}

.home-hero-main {
  padding: 22px 22px 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel) 86%, transparent);
  box-shadow: var(--shadow);
}

.home-title {
  margin: 0 0 8px;
  font-size: 26px;
}

.home-subtitle {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 14px;
}

.home-description {
  margin: 4px 0 14px;
  color: color-mix(in oklab, var(--text) 88%, var(--muted));
  font-size: 14px;
}

.home-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
}

/* ====== 首页文章列表 ====== */

.home-posts {
  margin-top: 18px;
}

.home-post-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
  margin-bottom: 12px;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.home-post-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  background: color-mix(in oklab, var(--panel) 90%, transparent);
}

.home-post-date {
  align-self: flex-start;
  text-align: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  min-width: 70px;
}

.home-post-day {
  display: block;
  font-size: 18px;
  font-weight: 600;
}

.home-post-ym {
  display: block;
  font-size: 11px;
  color: var(--muted);
}

.home-post-title {
  margin: 0 0 4px;
  font-size: 17px;
}

.home-post-title a {
  color: inherit;
}

.home-post-meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

.home-post-cat a {
  color: var(--muted);
}

.home-post-excerpt {
  font-size: 14px;
  color: color-mix(in oklab, var(--text) 86%, var(--muted));
  margin-bottom: 6px;
}

.home-post-more {
  display: inline-flex;
  font-size: 13px;
  color: var(--link);
}

@media (max-width: 640px) {
  .home-post-item {
    grid-template-columns: 1fr;
  }

  .home-post-date {
    align-self: auto;
    justify-self: flex-start;
  }
}