/* AI博客系统 - 响应式样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

/* 头部 */
.site-header {
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    padding: 16px 0;
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
.logo { font-size: 24px; font-weight: 700; color: #111; }
.main-nav { display: flex; gap: 16px; flex-wrap: wrap; }
.main-nav a { color: #4b5563; font-size: 14px; }
.main-nav a:hover { color: #2563eb; }

/* 主内容 */
main { padding: 24px 0 40px; min-height: 60vh; }
.hero { text-align: center; padding: 40px 0; background: #fff; margin-bottom: 24px; border-radius: 8px; }
.hero h1 { font-size: 32px; margin-bottom: 8px; }
.hero p { color: #6b7280; }

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 24px;
}
@media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; }
}

/* 文章卡片 */
.article-card {
    background: #fff;
    padding: 24px;
    margin-bottom: 16px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.article-card h2 { font-size: 20px; margin-bottom: 8px; }
.article-card h2 a { color: #111; }
.article-card h2 a:hover { color: #2563eb; }
.meta { font-size: 13px; color: #6b7280; margin-bottom: 12px; display: flex; gap: 12px; flex-wrap: wrap; }
.meta a { color: #2563eb; }
.summary { color: #4b5563; font-size: 14px; line-height: 1.7; }

/* 文章详情 */
.article-detail {
    background: #fff;
    padding: 32px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.article-detail h1 { font-size: 28px; margin-bottom: 12px; }
.article-summary { color: #6b7280; font-size: 16px; margin: 16px 0; padding-left: 12px; border-left: 3px solid #2563eb; }
.article-content { margin: 24px 0; line-height: 1.9; }
.article-content h1, .article-content h2, .article-content h3 { margin: 24px 0 12px; }
.article-content p { margin-bottom: 16px; }
.article-content ul { margin: 12px 0 12px 24px; }
.article-content pre {
    background: #1f2937;
    color: #f9fafb;
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 16px 0;
}
.breadcrumb { font-size: 13px; color: #6b7280; margin-bottom: 16px; }
.article-tags { margin-top: 24px; font-size: 14px; color: #6b7280; }
.article-tags a { background: #e5e7eb; padding: 4px 10px; border-radius: 4px; margin-right: 8px; color: #374151; }
.prev-next {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #e5e7eb;
    font-size: 14px;
}
.related-articles { margin-top: 24px; background: #fff; padding: 24px; border-radius: 8px; }
.related-articles ul { list-style: none; }
.related-articles li { padding: 8px 0; border-bottom: 1px solid #f3f4f6; }

/* 归档 */
.archive-month { margin-bottom: 24px; }
.archive-month h2 { font-size: 18px; margin-bottom: 8px; color: #2563eb; }
.archive-month ul { list-style: none; }
.archive-month li { padding: 6px 0; display: flex; justify-content: space-between; }
.archive-month .date { color: #9ca3af; font-size: 13px; }

/* 搜索 */
.search-box { margin-bottom: 24px; }
.search-box form { display: flex; gap: 8px; }
.search-box input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 14px;
}
.search-box button {
    padding: 10px 20px;
    background: #2563eb;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

/* 分页 */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 24px; }
.pagination a {
    padding: 6px 12px;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    color: #374151;
    background: #fff;
}
.pagination a.active { background: #2563eb; color: #fff; border-color: #2563eb; }

/* 404 */
.error-page { text-align: center; padding: 80px 20px; }
.error-page h1 { font-size: 64px; color: #d1d5db; }
.error-page a { color: #2563eb; }

/* 底部 */
.site-footer {
    background: #fff;
    border-top: 1px solid #e5e7eb;
    padding: 24px 0;
    margin-top: 40px;
}
.footer-inner { text-align: center; font-size: 13px; color: #6b7280; }
.footer-inner p { margin: 4px 0; }

/* 后台 */
.admin-wrapper { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 220px;
    background: #1f2937;
    color: #f9fafb;
    padding: 20px 0;
    flex-shrink: 0;
}
.admin-sidebar .logo { padding: 0 20px 20px; border-bottom: 1px solid #374151; color: #fff; }
.admin-sidebar nav a {
    display: block;
    padding: 12px 20px;
    color: #d1d5db;
    font-size: 14px;
}
.admin-sidebar nav a:hover, .admin-sidebar nav a.active { background: #374151; color: #fff; }
.admin-main { flex: 1; padding: 24px; background: #f3f4f6; }
.admin-card {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    margin-bottom: 20px;
}
.admin-card h2 { font-size: 18px; margin-bottom: 16px; }
table.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th, .admin-table td { padding: 10px; text-align: left; border-bottom: 1px solid #e5e7eb; }
.admin-table th { background: #f9fafb; font-weight: 600; }
.admin-table tr:hover td { background: #f9fafb; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 500; }
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 14px;
}
.form-group textarea { min-height: 200px; font-family: inherit; }
.btn {
    display: inline-block;
    padding: 8px 16px;
    background: #2563eb;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}
.btn:hover { background: #1d4ed8; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-danger { background: #dc2626; }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: #059669; }
.btn-success:hover { background: #047857; }
.btn-secondary { background: #6b7280; }
.btn-secondary:hover { background: #4b5563; }
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #d1fae5; color: #065f46; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-info { background: #dbeafe; color: #1e40af; }
.login-box { max-width: 380px; margin: 80px auto; }
.login-box .admin-card { padding: 32px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: #fff; padding: 20px; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.stat-card .number { font-size: 32px; font-weight: 700; color: #2563eb; }
.stat-card .label { font-size: 14px; color: #6b7280; }

@media (max-width: 768px) {
    .admin-wrapper { flex-direction: column; }
    .admin-sidebar { width: 100%; padding: 10px 0; }
    .admin-sidebar nav { display: flex; overflow-x: auto; padding: 0 10px; }
    .admin-sidebar nav a { white-space: nowrap; padding: 10px 14px; }
    .admin-main { padding: 12px; }
    .article-detail { padding: 20px; }
}