/* Trang bài viết: nội dung đọc dễ (cỡ chữ, khoảng dòng), mục lục, hỏi đáp, sản phẩm trong bài, cột phải. */
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 32px; align-items: start; }
.article-main { min-width: 0; padding: 26px 32px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.article-head h1 { margin: 10px 0 8px; font-size: clamp(24px, 3.2vw, 34px); line-height: 1.25; letter-spacing: -.01em; }
.article-meta { margin: 0 0 12px; color: var(--muted); font-size: 13px; }
.article-summary { margin: 0 0 18px; padding: 14px 16px; border-left: 4px solid var(--orange); border-radius: 0 8px 8px 0; background: #fff7f1; color: #3d4852; font-size: 16.5px; line-height: 1.6; }
.article-cover { margin: 0 0 20px; }
.article-cover img { display: block; width: 100%; max-height: 460px; object-fit: contain; border-radius: 10px; background: #f8f9fa; }
.article-toc { margin: 0 0 22px; border: 1px solid #f0e2d8; border-radius: 10px; background: #fffaf6; }
.article-toc summary { padding: 12px 16px; font-weight: 800; cursor: pointer; }
.article-toc ol { margin: 0; padding: 0 16px 14px 36px; }
.article-toc li { margin: 4px 0; }
.article-toc .toc-l3 { margin-left: 18px; list-style: circle; font-size: 14px; }
.article-toc a { color: #33404a; }
.article-toc a:hover { color: var(--orange); }

.article-body { color: #26313a; font-size: 16.5px; line-height: 1.8; overflow-wrap: anywhere; }
.article-body h2 { margin: 32px 0 12px; padding-bottom: 6px; border-bottom: 2px solid #ffe1cc; font-size: 23px; line-height: 1.3; scroll-margin-top: 16px; }
.article-body h3 { margin: 24px 0 8px; font-size: 19px; line-height: 1.35; scroll-margin-top: 16px; }
.article-body p { margin: 0 0 14px; }
.article-body ul, .article-body ol { margin: 0 0 16px; padding-left: 24px; }
.article-body li { margin: 4px 0; }
.article-body a { color: #d9480f; font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.article-body img { display: block; max-width: 100%; height: auto; margin: 8px auto; border-radius: 8px; }
.article-body figure { margin: 18px 0; text-align: center; }
.article-body figcaption { color: var(--muted); font-size: 13.5px; font-style: italic; }
.article-body table { width: 100%; margin: 0 0 18px; border-collapse: collapse; font-size: 15px; }
.article-body th, .article-body td { padding: 9px 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.article-body th { background: #fff4ec; }
.article-body blockquote { margin: 16px 0; padding: 12px 16px; border-left: 4px solid #2e7d32; border-radius: 0 8px 8px 0; background: #eef8f0; }
.article-body .note-warning { padding: 12px 16px; border-left: 4px solid #c62828; border-radius: 0 8px 8px 0; background: #fdecec; }

.article-products, .article-faq { margin-top: 30px; }
.article-products h2, .article-faq h2 { margin: 0 0 14px; font-size: 21px; }
.article-more { margin: 10px 0 0; text-align: right; }
.article-more a { color: var(--orange); font-weight: 700; }
.article-faq details { margin-bottom: 8px; border: 1px solid var(--line); border-radius: 8px; background: #fafbfb; }
.article-faq summary { padding: 12px 16px; font-weight: 700; cursor: pointer; }
.article-faq details[open] summary { color: var(--orange); }
.article-faq details p { margin: 0; padding: 0 16px 14px; line-height: 1.7; }
.article-cta { display: flex; align-items: center; gap: 14px; margin-top: 28px; padding: 16px 18px; border: 2px solid #ffc7a6; border-radius: 12px; background: linear-gradient(120deg, #fff4ec, #fff); }
.article-cta div { flex: 1; }
.article-cta p { margin: 2px 0 0; color: var(--muted); font-size: 14px; }
.article-cta a:not(.button) { color: #e03d0a; font-weight: 800; }

.article-side { position: sticky; top: 12px; display: flex; flex-direction: column; gap: 16px; }
.article-side-box { padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.article-side-box h2 { margin: 0 0 10px; font-size: 16px; text-transform: uppercase; }
.article-side-products, .article-side-posts { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.article-side-products a { display: grid; grid-template-columns: 56px 1fr; gap: 10px; align-items: center; color: var(--dark); }
.article-side-products img { width: 56px; height: 56px; object-fit: contain; border: 1px solid var(--line); border-radius: 6px; }
.article-side-products strong { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; font-size: 13px; line-height: 1.35; }
.article-side-products em { display: block; color: #e03d0a; font-size: 13px; font-style: normal; font-weight: 700; }
.article-side-posts a { display: block; color: #33404a; font-size: 14px; line-height: 1.4; }
.article-side-posts a:hover, .article-side-products a:hover strong { color: var(--orange); }

/* Trang danh sách bài viết */
.topic-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; padding: 0; list-style: none; }
.topic-chips a { display: inline-block; padding: 6px 14px; border: 1px solid #d9dde0; border-radius: 18px; background: #fff; color: #33404a; font-size: 13.5px; font-weight: 650; }
.topic-chips a.is-active, .topic-chips a:hover { border-color: var(--orange); background: var(--orange); color: #fff; }

@media (max-width: 1000px) { .article-layout { grid-template-columns: 1fr; } .article-side { position: static; } }
@media (max-width: 640px) { .article-main { padding: 18px 16px; } .article-body { font-size: 16px; } .article-cta { flex-wrap: wrap; } }