/* ============================================================
   清风笔记 · 全局样式
   ============================================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
               Helvetica, Arial, sans-serif;
  color: #333;
  background: #f5f6fa;
  line-height: 1.8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: #2d6da8; text-decoration: none; transition: color 0.2s; }
a:hover { color: #1a4b7a; text-decoration: underline; }

img { max-width: 100%; height: auto; }

/* ---------- Header ---------- */
.site-header {
  background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
  color: #fff;
  padding: 0;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px 32px;
}

.site-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.site-title a {
  color: #fff;
}
.site-title a:hover {
  color: #e8f0fe;
  text-decoration: none;
}

.site-subtitle {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
  margin-top: 6px;
}

nav.main-nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  background: rgba(0,0,0,0.1);
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 0;
}

nav.main-nav li { margin: 0; }

nav.main-nav a {
  display: block;
  padding: 12px 20px;
  color: rgba(255,255,255,0.9);
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: #fff;
  background: rgba(255,255,255,0.1);
  border-bottom-color: #fff;
  text-decoration: none;
}

/* ---------- Main Content ---------- */
.main-content {
  flex: 1;
  max-width: 960px;
  margin: 32px auto;
  padding: 0 24px;
  width: 100%;
}

/* ---------- Card ---------- */
.card {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  padding: 32px;
  margin-bottom: 24px;
}

/* ---------- Post List (首页) ---------- */
.post-list { list-style: none; }

.post-item {
  padding: 28px 0;
  border-bottom: 1px solid #eee;
}
.post-item:first-child { padding-top: 0; }
.post-item:last-child { border-bottom: none; }

.post-meta {
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 8px;
}
.post-meta span { margin-right: 12px; }

.post-title {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.post-title a { color: #2c3e50; }
.post-title a:hover { color: #3498db; text-decoration: none; }

.post-excerpt {
  color: #555;
  font-size: 0.95rem;
  line-height: 1.7;
}

.post-tags { margin-top: 10px; }
.tag {
  display: inline-block;
  background: #eef2f7;
  color: #2d6da8;
  font-size: 0.8rem;
  padding: 2px 10px;
  border-radius: 12px;
  margin-right: 6px;
}

/* ---------- Article Page ---------- */
.article-header { margin-bottom: 24px; }
.article-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: #2c3e50;
  line-height: 1.4;
}

.article-body { font-size: 1rem; color: #444; }
.article-body p { margin-bottom: 16px; }
.article-body h2 {
  font-size: 1.4rem;
  margin: 32px 0 16px;
  color: #2c3e50;
  padding-bottom: 8px;
  border-bottom: 2px solid #eef2f7;
}
.article-body h3 {
  font-size: 1.15rem;
  margin: 24px 0 12px;
  color: #2c3e50;
}
.article-body ul,
.article-body ol {
  margin: 0 0 16px 24px;
}
.article-body li { margin-bottom: 6px; }
.article-body blockquote {
  border-left: 4px solid #3498db;
  background: #f8f9fc;
  padding: 12px 20px;
  margin: 16px 0;
  color: #555;
  font-style: italic;
}
.article-body code {
  background: #f0f2f5;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 0.9em;
}
.article-body pre {
  background: #2c3e50;
  color: #e8e8e8;
  padding: 16px 20px;
  border-radius: 6px;
  overflow-x: auto;
  margin: 16px 0;
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---------- About Page ---------- */
.about-content { font-size: 1rem; color: #444; }
.about-content p { margin-bottom: 14px; }

/* ---------- Footer ---------- */
.site-footer {
  background: #2c3e50;
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 24px;
  font-size: 0.85rem;
  margin-top: auto;
}
.site-footer a { color: rgba(255,255,255,0.8); }
.site-footer a:hover { color: #fff; }
.site-footer p { margin-bottom: 4px; }
.site-footer .icp-info { margin-top: 6px; font-size: 0.8rem; }

/* ---------- Pagination ---------- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}
.pagination a, .pagination span {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 4px;
  background: #fff;
  color: #333;
  font-size: 0.9rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.pagination a:hover {
  background: #3498db;
  color: #fff;
  text-decoration: none;
}
.pagination span.current {
  background: #3498db;
  color: #fff;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .header-inner { padding: 24px 16px 20px; }
  .site-title { font-size: 1.5rem; }
  nav.main-nav a { padding: 10px 14px; font-size: 0.85rem; }
  .main-content { margin: 20px auto; padding: 0 16px; }
  .card { padding: 20px; }
  .article-header h1 { font-size: 1.4rem; }
  .post-title { font-size: 1.15rem; }
  nav.main-nav ul { flex-wrap: wrap; }
}