:root {
  --bg: #ffffff;
  --panel: #f8f9fa;
  --text: #1a202c;
  --muted: #718096;
  --link: #2563eb;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }

html, body {
  padding: 0;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; transition: color 0.2s; }
a:hover { color: #1d4ed8; text-decoration: underline; }

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 24px 64px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  margin-bottom: 64px;
  padding-bottom: 0;
  border-bottom: none;
}

.brand-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.site-logo {
  width: 28px;
  height: 28px;
  vertical-align: middle;
}
.brand-title a { color: var(--text); }
.brand-title a:hover { text-decoration: none; }

.brand-subtitle {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
}

.nav { display: flex; gap: 24px; font-size: 15px; font-weight: 500; }
.nav-link { color: var(--muted); }
.nav-link:hover { color: var(--text); text-decoration: none; }

.main { min-height: 60vh; }

/* 首页布局 */
.home-title { margin: 0 0 16px; font-size: 32px; font-weight: 800; }
.intro .content { font-size: 18px; color: var(--text); margin-bottom: 48px; }

/* Projects Grid Style */
.projects-section { margin-bottom: 64px; }
.section-title {
  margin: 0 0 24px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 600;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  transition: transform 0.2s, box-shadow 0.2s;
  color: var(--text);
}

.project-card:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  border-color: #cbd5e0;
}

.project-icon { font-size: 24px; margin-bottom: 4px; }
.project-name { margin: 0; font-size: 18px; font-weight: 700; color: var(--text); }
.project-desc { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.5; }
.project-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; }
.project-tag {
  font-size: 11px;
  background: #edf2f7;
  padding: 2px 6px;
  border-radius: 4px;
  color: #4a5568;
  font-weight: 500;
}

/* 文章详情页样式 */
.page-title {
  margin: 0 0 16px;
  font-size: 36px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.content {
  font-size: 18px;
  color: #2d3748;
}
.content p { margin: 1.5em 0; }
.content h2 { margin: 2em 0 0.75em; font-size: 1.5em; letter-spacing: -0.01em; }
.content h3 { margin: 1.75em 0 0.75em; font-size: 1.25em; }
.content ul, .content ol { margin: 1em 0 1em 24px; padding: 0; }
.content li { margin: 0.5em 0; }
.content img {
  max-width: 100% !important;
  height: auto !important;
  border-radius: 8px;
  display: block;
  margin: 1.5em auto;
}
.content figure {
  margin: 1.5em 0;
  text-align: center;
}
.content figure img {
  margin: 0 auto;
}
.content blockquote {
  border-left: 4px solid var(--link);
  margin: 1.5em 0;
  padding-left: 1em;
  font-style: italic;
  color: var(--muted);
}

/* 列表页优化 */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.post-item {
  padding: 0;
  border: none;
  background: transparent;
}

.post-link {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.post-link:hover { text-decoration: underline; color: var(--link); }

.post-meta {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.post-tags { display: inline-flex; gap: 8px; }
.post-tags a {
  background: var(--panel);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}
.post-tags a:hover { color: var(--text); background: #edf2f7; text-decoration: none; }

.sep { opacity: 0.4; }

.site-footer {
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

.footer-row { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.beian { margin-top: 12px; font-size: 12px; }

pre, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.9em;
}

code {
  background: var(--panel);
  padding: 2px 5px;
  border-radius: 4px;
  color: #c026d3; /* 紫色高亮代码 */
}

pre {
  padding: 20px;
  border-radius: 8px;
  overflow: auto;
  background: #f1f5f9; /* 浅灰背景 */
  color: var(--text);
  border: none;
}
pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* Mobile Responsive */
@media (max-width: 640px) {
  .container {
    padding: 24px 16px 48px;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 40px;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
    gap: 20px;
    overflow-x: auto;
    white-space: nowrap;
    padding-bottom: 4px; /* Hide scrollbar visual or give space */
    -webkit-overflow-scrolling: touch;
  }
  
  /* Hide scrollbar for Chrome, Safari and Opera */
  .nav::-webkit-scrollbar {
    display: none;
  }
  /* Hide scrollbar for IE, Edge and Firefox */
  .nav {
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
  }

  .home-title {
    font-size: 28px;
  }

  .intro .content {
    font-size: 16px;
    margin-bottom: 32px;
  }

  .project-grid {
    gap: 16px;
    grid-template-columns: 1fr;
  }
  
  .page-title {
    font-size: 26px;
  }
  
  .content {
    font-size: 16px;
  }
  
  .footer-row {
    flex-direction: column;
    gap: 12px;
  }
  
  .site-footer {
    margin-top: 48px;
  }
}