*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #f9f8f6;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #5a5a5a;
  --color-text-muted: #949494;
  --color-accent: #c7644a;
  --color-accent-hover: #a84d35;
  --color-accent-subtle: #fbf4f1;
  --color-border: #e7e4df;
  --color-card-border: #ece9e4;
  --color-tag-bg: #f7efeb;
  --color-tag-text: #b55a42;
  --color-code-bg: #f2efe9;
  --max-width: 700px;
  --radius: 6px;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", "Consolas", "JetBrains Mono", monospace;
}

::selection {
  background: var(--color-accent-subtle);
  color: var(--color-accent-hover);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 58px;
}

.site-logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.3px;
  transition: color 0.2s ease;
}

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

.site-nav {
  display: flex;
  gap: 26px;
}

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-nav a:hover {
  color: var(--color-text);
}

.site-nav a.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.hero {
  padding: 72px 0 48px;
  border-top: 3px solid var(--color-accent);
}

.hero-content h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 14px;
  color: var(--color-text);
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  max-width: 440px;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-bottom: 48px;
}

.post-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 26px 28px;
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
}

.post-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.06);
  transform: translateY(-1px);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.post-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.post-tag {
  font-size: 0.72rem;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.post-title {
  font-size: 1.28rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
  line-height: 1.35;
  transition: color 0.2s ease;
}

.post-card:hover .post-title {
  color: var(--color-accent);
}

.post-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-page {
  padding: 56px 0 48px;
}

.post-header {
  margin-bottom: 44px;
}

.post-header .post-title {
  font-size: 2rem;
  line-height: 1.3;
}

.post-header .post-meta {
  margin-bottom: 16px;
}

.post-body {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text);
}

.post-body p {
  margin-bottom: 1.3em;
}

.post-body h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2.2em 0 0.8em;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text);
}

.post-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 1.8em 0 0.6em;
  color: var(--color-text);
}

.post-body code {
  background: var(--color-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: #b54a35;
}

.post-body pre {
  background: #1e1e24;
  color: #d5cfc8;
  padding: 22px 26px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.4em 0;
  font-size: 0.88rem;
  line-height: 1.7;
}

.post-body pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.post-body ul,
.post-body ol {
  margin: 0.9em 0;
  padding-left: 1.6em;
}

.post-body li {
  margin-bottom: 0.5em;
}

.post-body img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 1.4em 0;
}

.post-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 6px 0 6px 18px;
  margin: 1.4em 0;
  color: var(--color-text-secondary);
  background: var(--color-accent-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.post-body a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.post-body a:hover {
  border-bottom-color: var(--color-accent);
}

.post-back {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.post-back a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

.about-page {
  padding: 56px 0 48px;
}

.about-page h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.about-page p {
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 1.3em;
  color: var(--color-text-secondary);
}

.site-footer {
  margin-top: auto;
  padding: 28px 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-footer p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.site-footer a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.empty-state {
  text-align: center;
  padding: 64px 0;
  color: var(--color-text-muted);
}

.empty-state p {
  font-size: 1rem;
}

@media (max-width: 600px) {
  .container {
    padding: 0 18px;
  }

  .hero {
    padding: 48px 0 36px;
  }

  .hero-content h1 {
    font-size: 1.6rem;
  }

  .hero-desc {
    font-size: 1rem;
    max-width: none;
  }

  .post-card {
    padding: 20px 20px;
  }

  .post-title {
    font-size: 1.12rem;
  }

  .post-excerpt {
    font-size: 0.9rem;
  }

  .post-header .post-title {
    font-size: 1.5rem;
  }

  .post-body {
    font-size: 1rem;
  }

  .post-body pre {
    padding: 16px 18px;
    font-size: 0.82rem;
  }

  .about-page h1 {
    font-size: 1.6rem;
  }

  .site-nav {
    gap: 20px;
  }
}