/* SEO CMS - Lightweight Responsive Styles */
*, *::before, *::after { box-sizing: border-box; }
:root {
  --header-bg: #1a1a2e;
  --header-text: #ffffff;
  --body-bg: #f5f5f5;
  --body-text: #333333;
  --link-color: #4a90d9;
  --button-bg: #4a90d9;
  --button-text: #ffffff;
  --footer-bg: #1a1a2e;
  --footer-text: #e8e8e8;
  --card-bg: #ffffff;
  --card-border: #e0e0e0;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--body-text);
  background: var(--body-bg);
}

/* Header */
.site-header {
  background: var(--header-bg);
  color: var(--header-text);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 0.75rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}
.logo {
  color: inherit;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
}
.logo img { display: block; height: 40px; width: auto; }
.main-nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.main-nav a {
  color: inherit;
  text-decoration: none;
}
.main-nav a:hover { text-decoration: underline; }
.header-ad {
  padding: 0.5rem 1.5rem;
  min-height: 50px;
  text-align: center;
}

/* Search */
.search-section {
  padding: 1rem 1.5rem;
  background: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
}
.search-form {
  display: flex;
  max-width: 600px;
  margin: 0 auto;
  gap: 0.5rem;
}
.search-form input[type="search"] {
  flex: 1;
  padding: 0.6rem 1rem;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  font-size: 1rem;
}
.search-form button {
  padding: 0.6rem 1.25rem;
  background: var(--button-bg);
  color: var(--button-text);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
}

/* Banner Ad */
.banner-ad, .mid-ad, .footer-ad {
  padding: 0.75rem;
  text-align: center;
  min-height: 60px;
}
.banner-ad img, .mid-ad img, .footer-ad img {
  max-width: 100%;
  height: auto;
}
.ad-banner { display: inline-block; }

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}
.section-title, .main-content h1, .main-content h2 {
  margin: 0 0 1rem;
  font-size: 1.5rem;
}

/* Grid */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols, 2), 1fr);
  gap: 1.25rem;
}
@media (max-width: 768px) {
  .grid-cards { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
}
@media (max-width: 480px) {
  .grid-cards { grid-template-columns: 1fr; }
}

/* Post Card */
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1rem;
  transition: box-shadow 0.2s;
}
.post-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.card-icon {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  object-fit: cover;
  display: block;
  margin-bottom: 0.5rem;
}
.card-title { margin: 0 0 0.25rem; font-size: 1rem; }
.card-version { font-size: 0.8rem; color: #666; }
.card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.btn {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  font-size: 0.875rem;
  text-decoration: none;
  border-radius: 6px;
  cursor: pointer;
  border: none;
}
.btn-download, .btn-primary {
  background: var(--button-bg);
  color: var(--button-text);
}
.btn-detail, .btn-secondary {
  background: transparent;
  color: var(--link-color);
  border: 1px solid var(--link-color);
}
.btn:hover { opacity: 0.9; }

/* Post Detail */
.post-detail .post-header {
  margin-bottom: 1.5rem;
}
.post-icon {
  width: 96px;
  height: 96px;
  border-radius: 16px;
  margin-bottom: 0.5rem;
}
.post-version, .post-category {
  display: inline-block;
  margin-right: 0.5rem;
  font-size: 0.9rem;
  color: #666;
}
.post-category { color: var(--link-color); text-decoration: none; }
.post-excerpt { margin: 1rem 0; color: #555; }
.post-actions { margin: 1rem 0; display: flex; gap: 0.5rem; }
.post-content {
  margin-top: 2rem;
  line-height: 1.7;
}
.post-content img, .page-content img { max-width: 100%; height: auto; }
.page-content { line-height: 1.7; }
.related-section { margin-top: 2rem; }

/* Comments */
.comments-section { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--card-border); }
.comments-section h2 { margin-bottom: 1rem; }
.comment-form { margin-bottom: 1.5rem; }
.comment-form input, .comment-form textarea { display: block; width: 100%; max-width: 400px; padding: 0.5rem; margin-bottom: 0.5rem; border: 1px solid var(--card-border); border-radius: 4px; }
.comment-form button { padding: 0.5rem 1rem; cursor: pointer; }
.comment-list { margin-top: 1rem; }
.comment-item { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 6px; padding: 1rem; margin-bottom: 0.75rem; }
.comment-item strong { margin-right: 0.5rem; }
.comment-date { font-size: 0.85rem; color: #666; }
.comment-item p { margin: 0.5rem 0 0; }
.comment-msg { padding: 0.5rem; margin-bottom: 1rem; border-radius: 4px; }
.comment-msg.success { background: #d4edda; color: #155724; }
.comment-msg.error { background: #f8d7da; color: #721c24; }

/* Search */
.search-meta { color: #666; margin-bottom: 1rem; }

/* Last Search / Recent Search */
.last-search-section {
  padding: 1.5rem 1.5rem 0 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
  box-sizing: border-box;
}
.last-search-section h2 {
  font-size: 1rem;
  margin: 0 0 0.75rem;
  color: var(--body-text);
  font-weight: 600;
}
.last-search-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.last-search-tag {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  color: var(--link-color);
  text-decoration: none;
  font-size: 0.9rem;
}
.last-search-tag:hover {
  background: var(--link-color);
  color: #fff;
  border-color: var(--link-color);
}

/* Footer */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 1.5rem;
  margin-top: 2rem;
  text-align: center;
}
.footer-inner { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 0.5rem; }
.footer-inner a { color: inherit; text-decoration: none; }
.footer-inner a:hover { text-decoration: underline; }
.copyright { font-size: 0.875rem; opacity: 0.8; margin: 0; }

/* Admin */
.admin-body { display: flex; min-height: 100vh; }
.admin-nav {
  width: 200px;
  background: #1a1a2e;
  color: #fff;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.admin-nav a {
  color: inherit;
  text-decoration: none;
  padding: 0.5rem;
  border-radius: 4px;
}
.admin-nav a:hover, .admin-nav a.active { background: rgba(255,255,255,0.1); }
.admin-main {
  flex: 1;
  padding: 1.5rem;
  max-width: 900px;
}
.admin-form label { display: block; margin-top: 0.75rem; font-weight: 500; }
.admin-form input[type="text"],
.admin-form input[type="url"],
.admin-form input[type="number"],
.admin-form input[type="color"],
.admin-form select,
.admin-form textarea {
  width: 100%;
  max-width: 500px;
  padding: 0.5rem;
  margin-top: 0.25rem;
  border: 1px solid #ddd;
  border-radius: 4px;
}
.admin-form button { margin-top: 1rem; padding: 0.5rem 1rem; cursor: pointer; }
.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}
.admin-table th, .admin-table td { padding: 0.5rem; border: 1px solid #ddd; text-align: left; }
.admin-table th { background: #f5f5f5; }
.admin-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.admin-card {
  padding: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
}
.admin-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.admin-card h3 { margin: 0 0 0.25rem; }
.admin-card p { margin: 0; font-size: 0.9rem; color: #666; }

/* Visitor Stats */
.visitor-stats { margin-bottom: 2rem; }
.visitor-stats h2 { margin-bottom: 1rem; font-size: 1.25rem; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}
.stat-number { display: block; font-size: 2rem; font-weight: 700; color: var(--link-color); }
.stat-label { font-size: 0.85rem; color: #666; }
.stat-online .stat-number { color: #0a0; }
.stat-today .stat-number { color: #4a90d9; }
.stat-monthly .stat-number { color: #9c27b0; }
.stat-total .stat-number { color: #ff9800; }
.admin-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1a1a2e;
}
.login-form {
  background: #fff;
  padding: 2rem;
  border-radius: 8px;
  width: 100%;
  max-width: 320px;
}
.login-form h1 { margin: 0 0 1rem; }
.login-form input { width: 100%; padding: 0.5rem; margin-bottom: 0.75rem; }
.login-form button { width: 100%; padding: 0.6rem; cursor: pointer; }
.error { color: #c00; }
.success { color: #0a0; }
.theme-grid { display: grid; grid-template-columns: auto 1fr; gap: 0.5rem 1rem; align-items: center; max-width: 400px; }
.theme-grid input[type="color"] { width: 60px; height: 36px; padding: 2px; }
.btn-secondary { background: #666; color: #fff; margin-left: 0.5rem; }
.muted { color: #555; font-size: 0.9rem; }