/* ============================================================
   头晕康复 V4：内容拆分版专属样式
   作用域：.dizziness-v4（仅本页面体系，不碰全局）
   主题：全程使用站点 CSS 变量，夜间模式自动跟随
   ============================================================ */

.dizziness-v4 {
  --v4-gap: 20px;
  --v4-card-pad: 20px;
  --v4-radius: 12px;
}

.dizziness-v4 section {
  margin-bottom: 36px;
}

.dizziness-v4 h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--teal-dark);
  margin-bottom: 12px;
}

.dizziness-v4 h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin: 20px 0 8px;
}

.dizziness-v4 p,
.dizziness-v4 li {
  line-height: 1.8;
  color: var(--ink);
}

.dizziness-v4 ul,
.dizziness-v4 ol {
  padding-left: 1.5em;
  margin: 8px 0 16px;
}

.dizziness-v4 li {
  margin-bottom: 6px;
}

.dizziness-v4 blockquote {
  border-left: 3px solid var(--teal);
  padding: 8px 16px;
  margin: 16px 0;
  background: var(--soft);
  color: var(--muted);
  font-size: 14px;
}

.dizziness-v4 a {
  color: var(--teal-dark);
}

/* ---------- S1 主视觉 ---------- */
.dizziness-v4 .v4-hero {
  text-align: center;
  padding: 12px 0 8px;
}

.dizziness-v4 .v4-tagline {
  font-size: 14px;
  letter-spacing: 4px;
  color: var(--teal);
  margin-bottom: 12px;
}

.dizziness-v4 .v4-lead {
  font-size: 17px;
  line-height: 1.9;
  max-width: 640px;
  margin: 0 auto 12px;
}

.dizziness-v4 .v4-doctor {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- S2 症状卡 ---------- */
.dizziness-v4 .v4-section-desc {
  color: var(--muted);
  margin-bottom: 16px;
}

.dizziness-v4 .v4-symptom-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--v4-gap);
}

.dizziness-v4 .v4-symptom-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--v4-radius);
  padding: var(--v4-card-pad);
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
}

.dizziness-v4 .v4-symptom-card:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}

.dizziness-v4 .v4-symptom-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--teal-dark);
}

.dizziness-v4 .v4-symptom-card p {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 10px;
  line-height: 1.7;
}

.dizziness-v4 .v4-more {
  font-size: 14px;
  color: var(--teal);
}

.dizziness-v4 .v4-disclaimer {
  font-size: 13px;
  color: var(--muted);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

/* ---------- S3 栏目入口 ---------- */
.dizziness-v4 .v4-section-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--v4-gap);
}

.dizziness-v4 .v4-section-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--v4-radius);
  padding: var(--v4-card-pad);
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
}

.dizziness-v4 .v4-section-card:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}

.dizziness-v4 .v4-section-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--teal-dark);
}

.dizziness-v4 .v4-section-card p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}

.dizziness-v4 .v4-section-card.v4-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--soft);
}

.dizziness-v4 .v4-section-card.v4-disabled:hover {
  transform: none;
  border-color: var(--line);
}

/* ---------- S4 理念 ---------- */
.dizziness-v4 .v4-philosophy {
  background: var(--soft);
  border-radius: var(--v4-radius);
  padding: 24px;
}

.dizziness-v4 .v4-principles {
  font-weight: 600;
  color: var(--teal-dark);
  margin: 12px 0;
}

/* ---------- S5 及时就医 ---------- */
.dizziness-v4 .v4-emergency {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid #c0392b;
  border-radius: var(--v4-radius);
  padding: 20px 24px;
}

.dizziness-v4 .v4-emergency h2 {
  color: #c0392b;
}

.dizziness-v4 .v4-emergency ul {
  margin: 12px 0;
}

.dizziness-v4 .v4-emergency li {
  margin-bottom: 8px;
}

.dizziness-v4 .v4-emergency-note {
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

/* ---------- S6 FAQ ---------- */
.dizziness-v4 .v4-faq-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 20px;
}

.dizziness-v4 .v4-faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0;
  overflow: hidden;
}

.dizziness-v4 .v4-faq-item summary {
  padding: 14px 16px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  color: var(--ink);
  list-style: none;
}

.dizziness-v4 .v4-faq-item summary::-webkit-details-marker {
  display: none;
}

.dizziness-v4 .v4-faq-item summary::before {
  content: "＋";
  color: var(--teal);
  margin-right: 8px;
  font-weight: 400;
}

.dizziness-v4 .v4-faq-item[open] summary::before {
  content: "－";
}

.dizziness-v4 .v4-faq-item p {
  padding: 0 16px 14px 32px;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- S7 最新文章 ---------- */
.dizziness-v4 .v4-article-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--v4-gap);
}

.dizziness-v4 .v4-article-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--v4-radius);
  padding: var(--v4-card-pad);
}

.dizziness-v4 .v4-article-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.dizziness-v4 .v4-article-card p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

/* ---------- S8 链接 ---------- */
.dizziness-v4 .v4-links {
  font-size: 15px;
  color: var(--muted);
}

.dizziness-v4 .v4-links p {
  margin-bottom: 8px;
}

/* ---------- 子页面导航 ---------- */
.dizziness-v4 .v4-subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.dizziness-v4 .v4-subnav a {
  font-size: 14px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 20px;
  text-decoration: none;
  color: var(--muted);
  background: var(--card);
}

.dizziness-v4 .v4-subnav a:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

.dizziness-v4 .v4-subnav a.v4-current {
  background: var(--teal-dark);
  border-color: var(--teal-dark);
  color: #fff;
}

.dizziness-v4 .v4-page-desc {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.dizziness-v4 .v4-next {
  background: var(--soft);
  border-radius: var(--v4-radius);
  padding: 20px 24px;
  margin-top: 32px;
}

.dizziness-v4 .v4-next h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.dizziness-v4 .v4-index-note {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
}

.dizziness-v4 .v4-article-index {
  margin-bottom: 8px;
}

.dizziness-v4 .v4-article-index li {
  margin-bottom: 8px;
}

/* ---------- 手机端 ---------- */
@media (max-width: 768px) {
  .dizziness-v4 .v4-symptom-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .dizziness-v4 .v4-symptom-card {
    padding: 14px;
  }

  .dizziness-v4 .v4-symptom-card h3 {
    font-size: 15px;
  }

  .dizziness-v4 .v4-symptom-card p {
    font-size: 13px;
  }

  .dizziness-v4 .v4-section-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .dizziness-v4 .v4-section-card {
    padding: 14px;
  }

  .dizziness-v4 .v4-faq-list {
    grid-template-columns: 1fr;
  }

  .dizziness-v4 .v4-article-grid {
    grid-template-columns: 1fr;
  }

  .dizziness-v4 .v4-subnav {
    gap: 6px;
  }

  .dizziness-v4 .v4-subnav a {
    font-size: 13px;
    padding: 6px 12px;
  }

  .dizziness-v4 section {
    margin-bottom: 28px;
  }

  .dizziness-v4 h2 {
    font-size: 20px;
  }
}

/* ---------- 超小屏 ---------- */
@media (max-width: 390px) {
  .dizziness-v4 .v4-symptom-grid,
  .dizziness-v4 .v4-section-grid {
    gap: 10px;
  }

  .dizziness-v4 .v4-philosophy,
  .dizziness-v4 .v4-emergency {
    padding: 16px;
  }
}