.topic-hero-strip {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 48px 20px;
  animation: fadeInUp 0.6s ease;
}

.topic-hero-strip h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  max-width: var(--max-w);
  margin: 0 auto 12px;
  line-height: 1.15;
}

.topic-hero-strip p {
  max-width: var(--max-w);
  margin: 0 auto;
  color: var(--muted);
  font-size: 16px;
}

.topic-body {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  animation: fadeInUp 0.7s ease 0.1s both;
}

.topic-rail {
  position: sticky;
  top: 100px;
  align-self: start;
}

.topic-rail-img {
  max-width: 500px;
  max-height: 320px;
  object-fit: cover;
  border: 1px solid var(--border);
  margin-bottom: 20px;
  width: 100%;
}

.topic-rail-nav {
  list-style: none;
  border-left: 2px solid var(--border);
  padding-left: 16px;
}

.topic-rail-nav li {
  margin-bottom: 10px;
}

.topic-rail-nav a {
  font-size: 13px;
  color: var(--muted);
}

.topic-rail-nav a:hover {
  color: var(--accent);
}

.topic-article h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.4rem;
  font-weight: 700;
  margin: 32px 0 14px;
  color: var(--text);
}

.topic-article h2:first-child {
  margin-top: 0;
}

.topic-article p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.topic-article ul {
  margin: 0 0 16px 20px;
  color: var(--muted);
  font-size: 15px;
}

.topic-article li {
  margin-bottom: 8px;
}

.topic-inline-img {
  max-width: 500px;
  max-height: 320px;
  object-fit: cover;
  float: right;
  margin: 0 0 20px 24px;
  border: 1px solid var(--border);
}

@media (max-width: 900px) {
  .topic-body {
    grid-template-columns: 1fr;
  }

  .topic-rail {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .topic-inline-img {
    float: none;
    margin: 20px auto;
    display: block;
  }
}

@media (max-width: 600px) {
  .topic-rail {
    grid-template-columns: 1fr;
  }

  .topic-rail-img {
    max-width: 100%;
    width: 100%;
    max-height: 200px;
    object-fit: cover;
  }

  .topic-body,
  .topic-rail {
    overflow: hidden;
    max-width: 100%;
  }
}