:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666666;
  --primary: #0F6CBD;
  --primary-hover: #0b5494;
  --border: #e5e5e5;
  --code-bg: #f8f9fa;
  --nav-bg: #ffffff;
}

[data-theme="dark"] {
  --bg: #0f0f0f;
  --fg: #e5e5e5;
  --muted: #999999;
  --primary: #0F6CBD; 
  --primary-hover: #4da3ef;
  --border: #333333;
  --code-bg: #1e1e1e;
  --nav-bg: #0f0f0f;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.8 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  transition: background .3s, color .3s;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-hover); }
h1, h2, h3, h4 { line-height: 1.4; font-weight: 700; color: var(--fg); }

/* --- 100% 宽度导航栏 --- */
.site-header {
  width: 100%;
  border-bottom: 1px solid var(--border);
  background: var(--nav-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
  height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.site-brand {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--fg);
  letter-spacing: -0.5px;
}
.site-brand:hover { color: var(--primary); text-decoration: none; }
.site-nav { display: flex; align-items: center; gap: 24px; }
.site-nav a { color: var(--fg); font-weight: 600; font-size: 0.95rem; }
.site-nav a:hover { color: var(--primary); text-decoration: none; }
.site-nav a i { margin-right: 6px; color: var(--muted); }
.site-nav a:hover i { color: var(--primary); }
#theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
  border-radius: 0;
  box-shadow: none;
}
#theme-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* --- 主布局 --- */
.site-main { flex: 1; padding: 60px 32px; }
.main-container { max-width: 900px; margin: 0 auto; }

/* --- 按钮组 --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  border: 1px solid var(--primary);
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 0;
  box-shadow: none;
}
.btn:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #fff; text-decoration: none; }
.btn-outline { background: transparent; color: var(--fg); border-color: var(--border); }
.btn-outline:hover { background: transparent; color: var(--primary); border-color: var(--primary); text-decoration: none; }

/* --- 首页介绍 (Home) --- */
.about-hero { margin-bottom: 80px; text-align: center; padding: 40px 0; }
.about-hero h1 { font-size: 3.5rem; letter-spacing: -1px; margin-bottom: 24px; }
.about-hero .highlight { color: var(--primary); }
.about-hero .lead { font-size: 1.25rem; color: var(--muted); max-width: 700px; margin: 0 auto 40px auto; }
.about-actions { display: flex; justify-content: center; gap: 16px; }

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
}
.stat-box { text-align: center; border-right: 1px solid var(--border); }
.stat-box:last-child { border-right: none; }
.stat-num { font-size: 2.5rem; font-weight: 800; color: var(--primary); font-family: ui-monospace, Menlo, monospace; }
.stat-label { color: var(--muted); font-weight: 600; margin-top: 8px; }

/* --- 文章列表页 (Posts) --- */
.page-header { margin-bottom: 48px; border-bottom: 2px solid var(--fg); padding-bottom: 16px; }
.page-header h1 { font-size: 2.2rem; margin: 0; }
.page-header p { color: var(--muted); margin: 8px 0 0 0; }

.article-list { display: flex; flex-direction: column; gap: 0; }
.list-item {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}
.list-item:hover { background: var(--code-bg); }
.list-meta { display: flex; gap: 24px; color: var(--muted); font-size: 0.9rem; margin-bottom: 12px; font-family: ui-monospace, Menlo, monospace; }
.list-meta i { color: var(--primary); margin-right: 4px; }
.list-title { font-size: 1.6rem; margin: 0 0 16px 0; }
.list-title a { color: var(--fg); }
.list-title a:hover { color: var(--primary); text-decoration: none; }
.list-summary { color: var(--muted); margin: 0 0 16px 0; font-size: 1rem; }
.read-more { font-weight: 600; font-size: 0.95rem; display: inline-flex; align-items: center; gap: 6px; }

/* --- 文章详情页 (Post) --- */
.post-detail { max-width: 760px; margin: 0 auto; }
.post-detail-header { text-align: center; margin-bottom: 48px; }
.post-detail-title { font-size: 2.8rem; letter-spacing: -1px; margin-bottom: 24px; }
.post-detail-meta { color: var(--muted); display: flex; justify-content: center; gap: 24px; font-family: ui-monospace, Menlo, monospace; font-size: 0.9rem; margin-bottom: 24px; }
.post-detail-meta i { color: var(--primary); margin-right: 4px; }
.post-detail-tags { display: flex; justify-content: center; gap: 12px; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  background: var(--code-bg);
  color: var(--primary);
  padding: 4px 12px;
  font-weight: 600;
  border: 1px solid var(--border);
}
.tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); text-decoration: none; }

.post-detail-content { font-size: 1.1rem; line-height: 1.9; }
.post-detail-content h2 { margin-top: 48px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.post-detail-content h3 { margin-top: 32px; }
.post-detail-content p { margin-bottom: 24px; }
.post-detail-content a { border-bottom: 1px solid var(--primary); }
.post-detail-content a:hover { text-decoration: none; background: var(--primary); color: #fff; }
.post-detail-content blockquote {
  margin: 32px 0;
  padding: 16px 24px;
  border-left: 4px solid var(--primary);
  background: var(--code-bg);
  color: var(--muted);
}
.post-detail-content pre {
  background: var(--code-bg);
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--border);
  margin: 32px 0;
}
.post-detail-content code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.9em; }
.post-detail-content p code { background: var(--code-bg); padding: 2px 6px; border: 1px solid var(--border); color: var(--primary); }
.post-detail-content img { max-width: 100%; border: 1px solid var(--border); }

.post-detail-footer { margin-top: 64px; padding-top: 32px; border-top: 1px solid var(--border); display: flex; justify-content: center; }

/* --- 归档页 --- */
.archive-year { margin-bottom: 40px; }
.archive-year h2 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 8px; font-family: ui-monospace, Menlo, monospace; }
.archive-list { list-style: none; padding: 0; margin: 0; }
.archive-list li { display: flex; gap: 24px; padding: 12px 0; border-bottom: 1px dashed var(--border); }
.archive-list li:hover { border-bottom-color: var(--primary); }
.archive-date { font-family: ui-monospace, Menlo, monospace; color: var(--muted); width: 100px; flex-shrink: 0; }

/* --- 100% 宽度页脚 --- */
.site-footer {
  width: 100%;
  border-top: 1px solid var(--border);
  background: var(--nav-bg);
  padding: 40px 32px;
  margin-top: auto;
}
.footer-container { max-width: 1400px; margin: 0 auto; text-align: center; color: var(--muted); font-size: 0.9rem; font-family: ui-monospace, Menlo, monospace; }

/* --- 响应式 --- */
@media (max-width: 768px) {
  .header-container { padding: 0 20px; flex-direction: column; height: auto; padding-top: 16px; padding-bottom: 16px; gap: 16px; }
  .site-nav { gap: 16px; width: 100%; justify-content: center; }
  .about-hero h1 { font-size: 2.5rem; }
  .about-actions { flex-direction: column; }
  .about-stats { grid-template-columns: 1fr; gap: 0; padding: 0; }
  .stat-box { padding: 24px 0; border-right: none; border-bottom: 1px solid var(--border); }
  .stat-box:last-child { border-bottom: none; }
  .post-detail-title { font-size: 2rem; }
  .site-main { padding: 40px 20px; }
}