/* ─── CSS 变量 (Anthropic 风格) ──────────────────────────── */
:root {
  --bg: #f4f0e6;
  --bg-card: #e5e0d3;
  --bg-header: #f4f0e6;
  --accent: #191919;
  --accent-hover: #000000;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #737373;
  --border: #d4cfc1;
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ─── 基础重置 ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ─── Header ─────────────────────────────────────────────── */
.site-header {
  background: var(--bg-header);
  /* padding-top: 10px; */
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 32px 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.site-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}
.update-time {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ─── 主体 ───────────────────────────────────────────────── */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 32px 80px;
}

/* ─── Loading / Error ────────────────────────────────────── */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 80px 0;
  color: var(--text-secondary);
}
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-box {
  background: #fdf8f8;
  border: 1px solid #fecaca;
  color: #b91c1c;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 32px 0;
}

/* ─── Section ────────────────────────────────────────────── */
.section { margin-bottom: 64px; }
.section-header {
  margin-bottom: 24px;
}
.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* ─── Top Grid（重点文章卡片）────────────────────────────── */
.top-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.top-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease;
}
.top-card:hover {
  transform: translateY(-2px);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.card-title a {
  color: inherit;
  text-decoration: none;
}
.card-title a:hover { text-decoration: underline; }

.card-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 20px;
}

/* 卡片底部单行信息 */
.card-footer-inline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.inline-item {
  color: var(--text-secondary);
  font-weight: 500;
}
.inline-dot {
  color: var(--border);
}
.inline-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.inline-link:hover {
  text-decoration: underline;
  color: var(--accent);
}

.btn-like-inline {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.btn-like-inline:hover {
  color: var(--accent);
}
.btn-like-inline.liked {
  color: var(--accent);
  font-weight: 600;
}

/* ─── List 条目 ──────────────────────────────────────────── */
.list-container {
  border-top: 1px solid var(--border);
}
.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.list-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
}
.list-title:hover {
  text-decoration: underline;
}

.list-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.list-source {
  white-space: nowrap;
}

.list-like {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.list-like:hover { color: var(--accent); }
.list-like.liked { color: var(--accent); font-weight: 600; }

.site-footer {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 24px;
  border-top: 1px solid var(--border);
}

/* ─── 响应式 ──────────────────────────────────────────────── */
@media (max-width: 640px) {
  .header-inner { padding: 16px 20px; }
  .main-container { padding: 24px 20px 60px; }
  .top-card { padding: 24px; }
  .list-item { flex-direction: column; align-items: flex-start; gap: 8px;}
  .list-meta { width: 100%; justify-content: space-between; gap: 10px;}
}