/* ============================================
   知識專欄 & 文章頁樣式
   ============================================ */

/* --- 篩選區 --- */
.section-filter {
  padding: 0 0 16px;
}

/* --- 大分類按鈕列 --- */
.category-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.category-btn {
  padding: 8px 22px;
  border-radius: 24px;
  border: 1.5px solid #2d2a5e;
  background: transparent;
  color: #2d2a5e;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  letter-spacing: 0.03em;
  transition: background 0.15s, color 0.15s;
}

.category-btn.active,
.category-btn:hover {
  background: #2d2a5e;
  color: #fff;
}

/* --- 分類與標籤之間的分隔線 --- */
.category-divider {
  width: 40px;
  height: 1px;
  background: #d4c5a9;
  margin: 20px auto;
}

/* --- Hashtag 篩選按鈕（次要輔助樣式） --- */
.filter-bar .filter-btn {
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid #d4c5a9;
  background: transparent;
  font-size: 13px;
  color: #888;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s, color 0.15s;
}

.filter-bar .filter-btn.active,
.filter-bar .filter-btn:hover {
  border-color: #2d2a5e;
  color: #2d2a5e;
  background: transparent;
}

/* --- 文章列表 --- */
.section-articles {
  padding: 0 0 var(--section-gap);
}

/* --- 文章頁 --- */
.article-page {
  padding: 40px 0 0;
}

.article-page .container {
  max-width: 960px;
}

.article-header {
  text-align: center;
  margin-bottom: 40px;
}

.article-meta {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 16px;
  display: flex;
  justify-content: center;
  gap: 16px;
}

.article-header h1 {
  margin-bottom: 16px;
}

.article-tags {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.article-tags .card-tag {
  color: #C9A84C;
}

.article-disclaimer {
  border: 1px solid #c9a84c;
  background: #fdf9f0;
  color: #5a4e3a;
  font-size: 14px;
  line-height: 1.7;
  padding: 16px 24px;
  border-radius: 4px;
  margin: 24px 0 32px;
  text-align: center;
}

.article-cover {
  width: 100%;
  height: 420px;
  margin-bottom: 48px;
}

/* --- 文章本文排版 --- */
.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text-primary);
}

.article-body h2 {
  margin: 48px 0 16px;
  font-size: 26px;
}

.article-body h3 {
  margin: 2.5em 0 12px;
  font-size: 20px;
}

.article-body p {
  margin-bottom: 20px;
}

/* 空段落（後台編輯器插入的空行）保留視覺高度 */
.article-body p:empty { min-height: 1em; }
.article-body p > br:only-child { display: block; margin-bottom: 0.8em; }

.article-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 16px 24px;
  margin: 32px 0;
  background: rgba(184, 160, 80, 0.06);
}

.article-body blockquote p {
  margin-bottom: 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.article-body ul,
.article-body ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.article-body ul {
  padding-left: 1.5em;
  list-style-type: disc;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.8;
}

/* 巢狀清單：二層縮排 + 不同符號 */
.article-body ul ul {
  padding-left: 1.8em;
  list-style-type: circle;
  margin-top: 4px;
  margin-bottom: 4px;
}
.article-body ul ul li {
  margin-bottom: 4px;
}

/* ---- Quill 有序清單：用 CSS counter 處理扁平結構的多層編號 ---- */

/* ol 本身關閉瀏覽器預設編號，改用 counter 控制 */
.article-body ol {
  list-style: none;
  counter-reset: ol-lv0;
}

/* 第 0 層（無 ql-indent）：阿拉伯數字 1. 2. 3.，並重設第 1 層計數器 */
.article-body ol > li:not([class*="ql-indent"]) {
  counter-increment: ol-lv0;
  counter-reset: ol-lv1;
}
.article-body ol > li:not([class*="ql-indent"])::before {
  content: counter(ol-lv0) ". ";
  font-weight: 500;
}

/* 第 1 層（ql-indent-1）：英文字母 a. b. c.，每遇到第 0 層會被重設 */
.article-body ol > li.ql-indent-1 {
  counter-increment: ol-lv1;
  counter-reset: ol-lv2;
  padding-left: 1.5em;
}
.article-body ol > li.ql-indent-1::before {
  content: counter(ol-lv1, lower-alpha) ". ";
}

/* 第 2 層（ql-indent-2）：小寫羅馬數字 i. ii. iii. */
.article-body ol > li.ql-indent-2 {
  counter-increment: ol-lv2;
  padding-left: 3em;
}
.article-body ol > li.ql-indent-2::before {
  content: counter(ol-lv2, lower-roman) ". ";
}

/* ---- Quill 無序清單縮排（ul 不受 counter 影響） ---- */
.article-body ul > li.ql-indent-1 { padding-left: 1.5em; }
.article-body ul > li.ql-indent-2 { padding-left: 3em; }
.article-body ul > li.ql-indent-3 { padding-left: 4.5em; }
.article-body ul > li.ql-indent-4 { padding-left: 6em; }
.article-body ul > li.ql-indent-5 { padding-left: 7.5em; }

/* ---- 通用縮排（非清單元素，例如 blockquote、p 的縮排） ---- */
.article-body :not(li).ql-indent-1 { padding-left: 3em; }
.article-body :not(li).ql-indent-2 { padding-left: 6em; }
.article-body :not(li).ql-indent-3 { padding-left: 9em; }

.article-table-wrapper {
  overflow-x: auto;
  margin: 32px 0;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 600px;
}

.article-body thead th {
  background: #1a2340;
  color: #fff;
  font-weight: 500;
  padding: 14px 16px;
  text-align: center;
  border: none;
  border-right: 1px solid rgba(255,255,255,0.12);
}

.article-body thead th:last-child {
  border-right: none;
}

.article-body th,
.article-body td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
}

.article-body tbody td:first-child {
  background: rgba(38, 33, 92, 0.05);
  font-weight: 500;
  color: var(--color-primary);
  white-space: nowrap;
}

.article-body tbody td {
  background: #fff;
  border-right: 1px solid var(--color-border);
}

.article-body tbody td:last-child {
  border-right: none;
}

.article-body tbody tr:last-child td {
  border-bottom: none;
}

.article-table-wrapper td,
.article-table-wrapper th {
  white-space: nowrap;
}

.article-figure {
  margin: 32px 0;
}

.article-figure figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-top: 8px;
}

/* --- 相關文章 --- */
.related-articles {
  margin-top: 64px;
}

.related-articles .grid-3 {
  margin-top: 24px;
}

/* ============================================
   RWD — 手機
   ============================================ */
@media (max-width: 767px) {
  .article-cover {
    height: 220px;
    margin-bottom: 32px;
  }

  .article-body h2 {
    font-size: 22px;
    margin: 36px 0 12px;
  }

  .article-body h3 {
    font-size: 18px;
  }

  .article-body blockquote {
    padding: 12px 16px;
    margin: 24px 0;
  }

  .article-table-wrapper {
    margin: 24px -16px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .related-articles .grid-3 {
    grid-template-columns: 1fr;
  }
}