/* articles.css — 科普文章排版（2026-09-29）
   只在文章页加载，避免改动 style.css。
   颜色全部沿用 style.css 的 :root 变量，保证主题一致。 */

/* ---------- 文章详情页 ---------- */
.article-page { max-width: 1100px; margin: 0 auto; padding: 24px 20px 60px; }

.article-breadcrumb { font-size: 13px; color: var(--text-light); margin-bottom: 20px; }
.article-breadcrumb a { color: var(--text-light); }
.article-breadcrumb a:hover { color: var(--primary-color); }

.article-header { margin-bottom: 24px; }
.article-header h1 { font-size: 30px; line-height: 1.35; color: var(--text-color); margin-bottom: 12px; }
.article-meta { font-size: 13px; color: var(--text-light); display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.article-meta .chip { background: #e8effc; color: var(--primary-color); padding: 2px 10px; border-radius: 20px; font-size: 12px; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 32px; align-items: start; }
@media (max-width: 991px) { .article-layout { grid-template-columns: 1fr; } }

.article-body { background: var(--white); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 32px 36px; }
.article-body h2 { font-size: 22px; margin: 34px 0 14px; padding-left: 12px; border-left: 4px solid var(--primary-color); }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { font-size: 17px; margin: 26px 0 10px; }
.article-body p { font-size: 15.5px; line-height: 1.9; color: var(--text-color); margin: 12px 0; }
.article-body ul, .article-body ol { padding-left: 22px; margin: 12px 0; }
.article-body li { font-size: 15.5px; line-height: 1.9; margin: 6px 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
.article-body th, .article-body td { border: 1px solid var(--border-color); padding: 8px 12px; text-align: left; }
.article-body th { background: #f1f5f9; }
.article-body tr:nth-child(even) td { background: #f8fafc; }
.article-body blockquote { border-left: 4px solid var(--secondary-color); background: #f0f6ff; padding: 12px 16px; margin: 16px 0; border-radius: 0 8px 8px 0; font-size: 14.5px; color: #334155; }
.article-body code { background: #f1f5f9; padding: 2px 6px; border-radius: 4px; font-size: 13.5px; font-family: Consolas, Menlo, monospace; }
.article-body strong { color: var(--primary-color); }
.article-body a { color: var(--primary-color); text-decoration: underline; }

/* 文内工具推荐卡 */
.article-cta-card { display: flex; align-items: center; gap: 14px; border: 1.5px dashed var(--secondary-color); background: #f0f6ff; border-radius: var(--radius); padding: 16px 18px; margin: 22px 0 6px; }
.article-cta-card .bi { font-size: 26px; color: var(--primary-color); flex-shrink: 0; }
.article-cta-card .cta-main { flex: 1; min-width: 0; }
.article-cta-card .cta-main strong { display: block; font-size: 15px; color: var(--text-color); }
.article-cta-card .cta-main span { font-size: 13px; color: var(--text-light); }
.article-cta-card .btn-sm { background: var(--primary-color); color: #fff; padding: 8px 16px; border-radius: 8px; font-size: 13.5px; white-space: nowrap; flex-shrink: 0; }
.article-cta-card .btn-sm:hover { background: #1447b8; color: #fff; }
@media (max-width: 576px) { .article-cta-card { flex-wrap: wrap; } .article-body { padding: 24px 20px; } }

/* FAQ */
.article-faq { background: var(--white); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 28px 36px; margin-top: 24px; }
.article-faq > h2 { font-size: 22px; margin: 0 0 8px; padding-left: 12px; border-left: 4px solid var(--primary-color); }
.faq-item { padding: 14px 0; border-bottom: 1px dashed var(--border-color); }
.faq-item:last-child { border-bottom: none; }
.faq-item h3 { font-size: 15.5px; color: var(--text-color); margin-bottom: 8px; }
.faq-item p { font-size: 14.5px; line-height: 1.85; color: #475569; }
@media (max-width: 576px) { .article-faq { padding: 24px 20px; } }

/* 侧栏 */
.article-aside { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 20px; }
.aside-card { background: var(--white); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 20px; }
.aside-card h3 { font-size: 15px; margin-bottom: 12px; }
.aside-card ul { list-style: none; }
.aside-card li { margin: 10px 0; font-size: 14px; line-height: 1.6; }
.aside-card li a { color: var(--text-color); }
.aside-card li a:hover { color: var(--primary-color); }
.aside-tool { display: flex; gap: 10px; align-items: flex-start; padding: 10px; border: 1px solid var(--border-color); border-radius: 8px; margin-bottom: 10px; }
.aside-tool:last-child { margin-bottom: 0; }
.aside-tool .bi { color: var(--primary-color); font-size: 18px; margin-top: 2px; }
.aside-tool strong { font-size: 14px; display: block; }
.aside-tool span { font-size: 12px; color: var(--text-light); line-height: 1.5; display: block; }
.aside-tool:hover { border-color: var(--primary-color); }

/* ---------- 文章库首页 ---------- */
.articles-head { max-width: 1100px; margin: 0 auto; padding: 40px 20px 8px; }
.articles-head h1 { font-size: 28px; }
.articles-head p { color: var(--text-light); margin-top: 8px; font-size: 14.5px; }
.articles-wrap { max-width: 1100px; margin: 0 auto; padding: 12px 20px 60px; }
.articles-group h2 { font-size: 20px; margin: 30px 0 16px; padding-left: 12px; border-left: 4px solid var(--primary-color); }
.article-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }
.article-card { background: var(--white); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; gap: 10px; transition: var(--transition); }
.article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.article-card h3 { font-size: 16.5px; line-height: 1.5; }
.article-card h3 a { color: var(--text-color); }
.article-card h3 a:hover { color: var(--primary-color); }
.article-card p { font-size: 13.5px; color: var(--text-light); line-height: 1.7; flex: 1; }
.article-card .card-meta { font-size: 12px; color: #94a3b8; display: flex; gap: 10px; }