/* 愈·考拉 · 内容专题样式（learn/）
 * 复用 portal/assets/css/style.css 配色变量；本文仅追加文章排版与 FAQ 折叠。
 * 内容专题以教育/陪伴为视角，不下诊断、不建议用药；危机热线每页独立渲染。
 */

:root {
  --bg: #faf8f5;
  --ink: #5c4a3a;
  --ink-soft: #7a6450;
  --ink-mute: #a08c76;
  --line: rgba(122, 100, 80, 0.16);
  --accent: #e8875a;
  --hotline-bg: rgba(232, 135, 90, 0.08);
  --hotline-border: rgba(232, 135, 90, 0.32);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Yuanti SC", "YouYuan", "Kaiti SC", "KaiTi", "DFKai-SB", sans-serif;
  line-height: 1.78;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- 顶部导航 ---------- */
.learn-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--line);
  background: rgba(250, 248, 245, 0.88);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
}
.learn-top .brand {
  font-size: 18px;
  color: var(--ink-soft);
  letter-spacing: 2px;
  text-decoration: none;
}
.learn-top .nav-back {
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(232, 135, 90, 0.1);
  transition: background 0.2s ease;
}
.learn-top .nav-back:hover {
  background: rgba(232, 135, 90, 0.22);
}

/* ---------- 文章主体 ---------- */
.article {
  flex: 1;
  width: min(720px, 92vw);
  margin: 48px auto 64px;
}

.article .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-mute);
  margin-bottom: 12px;
}
.article .meta .tag {
  padding: 2px 10px;
  border-radius: 999px;
  background: rgba(232, 135, 90, 0.12);
  color: var(--accent);
}

.article h1 {
  font-size: clamp(26px, 4.2vw, 38px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.article .lead {
  font-size: 16px;
  color: var(--ink-soft);
  background: rgba(232, 135, 90, 0.06);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 24px 0 36px;
}

.article h2 {
  font-size: clamp(20px, 3vw, 26px);
  color: var(--ink);
  margin: 40px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.article h3 {
  font-size: 18px;
  color: var(--ink-soft);
  margin: 28px 0 10px;
}

.article p {
  margin: 14px 0;
  font-size: 16px;
}

.article ul, .article ol {
  margin: 14px 0 14px 28px;
}
.article li {
  margin: 8px 0;
  font-size: 16px;
}

.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(122, 100, 80, 0.08);
}
.article th, .article td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
}
.article th {
  background: rgba(232, 135, 90, 0.08);
  color: var(--ink-soft);
  font-weight: 600;
}
.article tbody tr:last-child td { border-bottom: none; }

.article blockquote {
  margin: 20px 0;
  padding: 14px 20px;
  background: rgba(232, 135, 90, 0.05);
  border-left: 4px solid var(--accent);
  color: var(--ink-soft);
  border-radius: 0 8px 8px 0;
}

.article hr {
  border: none;
  border-top: 1px dashed var(--line);
  margin: 36px 0;
}

/* ---------- FAQ ---------- */
.faq {
  margin: 16px 0 36px;
}
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}
.faq details:first-of-type {
  border-top: 1px solid var(--line);
}
.faq summary {
  cursor: pointer;
  font-size: 16px;
  color: var(--ink);
  font-weight: 500;
  list-style: none;
  position: relative;
  padding-right: 32px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--accent);
  transition: transform 0.2s ease;
}
.faq details[open] summary::after {
  content: "−";
}
.faq details p {
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 15px;
}

/* ---------- 危机热线块（每页必有） ---------- */
.hotline {
  margin: 48px 0 32px;
  padding: 20px 24px;
  background: var(--hotline-bg);
  border: 1px solid var(--hotline-border);
  border-radius: 12px;
  text-align: center;
}
.hotline h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--accent);
}
.hotline p {
  margin: 4px 0;
  font-size: 15px;
  color: var(--ink-soft);
}
.hotline .numbers {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent);
  margin: 10px 0 6px;
}

/* ---------- 免责声明 ---------- */
.disclaimer {
  font-size: 13px;
  color: var(--ink-mute);
  padding: 16px 20px;
  background: rgba(122, 100, 80, 0.04);
  border-radius: 8px;
  line-height: 1.7;
}

/* ---------- 相关文章内链 ---------- */
.related {
  margin: 40px 0 8px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.related h3 {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}
.related ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.related li {
  margin: 6px 0;
}
.related a {
  color: var(--accent);
  text-decoration: none;
  font-size: 15px;
}
.related a:hover {
  text-decoration: underline;
}

/* ---------- 页脚 ---------- */
footer.learn-foot {
  text-align: center;
  padding: 18px 24px;
  font-size: 12px;
  color: var(--ink-mute);
  border-top: 1px solid var(--line);
}

/* ---------- 移动端 ---------- */
@media (max-width: 640px) {
  .learn-top { padding: 14px 18px; }
  .article { margin: 28px auto 48px; }
  .article table { font-size: 14px; }
  .article th, .article td { padding: 10px; }
}