/* 科普站前台样式 */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, -apple-system, "Microsoft YaHei", sans-serif; background: #f6f8fb; color: #1f2937; line-height: 1.7; }
.wrap { max-width: 900px; margin: 0 auto; padding: 0 16px; }

.site-header { background: #0f766e; color: #fff; }
.header-inner { display: flex; align-items: center; gap: 16px; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; }
.brand { font-size: 20px; font-weight: 700; color: #fff; text-decoration: none; }
.search { flex: 1; display: flex; gap: 6px; min-width: 220px; }
.search input { flex: 1; padding: 7px 12px; border: none; border-radius: 6px; font-size: 14px; }
.search button { padding: 7px 14px; border: none; border-radius: 6px; background: #134e4a; color: #fff; cursor: pointer; }
.admin-link { color: #ccfbf1; text-decoration: none; font-size: 14px; }
.nav { display: flex; gap: 18px; padding-top: 4px; padding-bottom: 10px; flex-wrap: wrap; }
.nav a { color: #ccfbf1; text-decoration: none; font-size: 14px; }
.nav a:hover { color: #fff; }

main { padding-top: 24px; padding-bottom: 40px; }

.hero { background: #0d9488; color: #fff; border-radius: 12px; padding: 22px 24px; margin-bottom: 24px; }
.hero h1 { font-size: 26px; margin-bottom: 6px; }
.hero p { color: #d1fae5; }

.section { margin-bottom: 28px; }
.section h2 { font-size: 20px; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid #0d9488; }

.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.cat-card { background: #fff; border: 1px solid #e5e7eb; border-radius: 10px; padding: 16px; text-decoration: none; color: inherit; display: block; }
.cat-card:hover { border-color: #0d9488; box-shadow: 0 2px 8px rgba(13,148,136,.12); }
.cat-card h3 { font-size: 17px; color: #0f766e; margin-bottom: 4px; }
.cat-card span { font-size: 13px; color: #6b7280; }

.art-list { list-style: none; }
.art-list li { background: #fff; border: 1px solid #e5e7eb; border-radius: 10px; padding: 14px 16px; margin-bottom: 10px; }
.art-list a.title { font-size: 17px; font-weight: 600; color: #111827; text-decoration: none; }
.art-list a.title:hover { color: #0d9488; }
.art-meta { font-size: 12px; color: #6b7280; margin-top: 4px; }
.art-summary { font-size: 14px; color: #374151; margin-top: 6px; }
.tags { margin-top: 8px; }
.tag { display: inline-block; background: #ccfbf1; color: #0f766e; border-radius: 20px; padding: 2px 10px; font-size: 12px; margin-right: 6px; }

/* 文章详情 */
.article-head { background: #fff; border: 1px solid #e5e7eb; border-radius: 12px; padding: 24px; margin-bottom: 20px; }
.article-head h1 { font-size: 26px; margin-bottom: 8px; }
.article-head .meta { font-size: 13px; color: #6b7280; margin-bottom: 10px; }
.article-head .cover { max-width: 100%; border-radius: 8px; margin-top: 10px; }
.video-box { background: #fff; border: 1px solid #e5e7eb; border-radius: 12px; padding: 16px; margin-bottom: 20px; }
.video-box iframe, .video-box video { width: 100%; border-radius: 8px; }
.article-body { background: #fff; border: 1px solid #e5e7eb; border-radius: 12px; padding: 24px; }
.article-body img { max-width: 100%; border-radius: 8px; }
.article-body h1, .article-body h2, .article-body h3 { margin: 18px 0 8px; color: #111827; }
.article-body p { margin: 10px 0; }
.article-body ul, .article-body ol { margin: 10px 0 10px 24px; }
.article-body blockquote { border-left: 4px solid #0d9488; background: #f0fdfa; padding: 10px 14px; color: #374151; margin: 12px 0; border-radius: 0 6px 6px 0; }
.article-body pre { background: #0f172a; color: #e2e8f0; padding: 14px; border-radius: 8px; overflow-x: auto; }
.article-body table { border-collapse: collapse; width: 100%; margin: 12px 0; }
.article-body th, .article-body td { border: 1px solid #d1d5db; padding: 8px 12px; }

.site-footer { border-top: 1px solid #e5e7eb; padding: 20px 16px; color: #6b7280; font-size: 13px; text-align: center; }
.empty { color: #6b7280; padding: 20px; text-align: center; background: #fff; border: 1px solid #e5e7eb; border-radius: 10px; }
.ext-link { display: inline-block; background: #0d9488; color: #fff; padding: 10px 22px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.ext-link:hover { background: #0f766e; }