/* 演讲嘉宾页面增强主题：提升可读性与对比度 */
.page-enhanced {
  --color-midnight: #0b1334;
  --color-ink: #1b2555;
  --color-muted: #485277;
  --color-cloud: #f3f6ff;
  --color-snow: #ffffff;
  --color-link: #0d4eff;
  --color-link-hover: #0636c7;
  --shadow-soft: 0 18px 36px rgba(15, 23, 42, 0.14);
}

.subpage-body.page-enhanced.contrast-c {
  background: var(--color-cloud);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.page-enhanced.contrast-c .skip-link:focus {
  outline: 2px solid var(--color-link);
  outline-offset: 4px;
}

.page-enhanced.contrast-c .topic-hero-section {
  background: linear-gradient(135deg, #0f1430 0%, #222d66 100%);
  color: var(--color-snow);
  padding: 0 0 32px;
  margin-top: -80px;
  padding-top: 80px;
}

.page-enhanced.contrast-c .topic-hero-content {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 20px;
  align-items: center;
}

.page-enhanced.contrast-c .topic-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 16px;
  opacity: 0.9;
}

.page-enhanced.contrast-c .topic-breadcrumb .breadcrumb-link {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}

.page-enhanced.contrast-c .topic-breadcrumb .breadcrumb-link:hover {
  color: var(--color-snow);
}

.page-enhanced.contrast-c .topic-breadcrumb .breadcrumb-separator {
  color: transparent;
}

.page-enhanced.contrast-c .topic-breadcrumb .breadcrumb-separator::after {
  content: "›";
  color: rgba(255, 255, 255, 0.65);
}

.page-enhanced.contrast-c .topic-main-title {
  font-size: clamp(2rem, 3vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 12px;
  color: var(--color-snow);
}

.page-enhanced.contrast-c .topic-subtitle {
  font-size: 0.98rem;
  line-height: 1.52;
  margin: 0 0 14px;
  max-width: 42ch;
  color: rgba(255, 255, 255, 0.9);
}

.page-enhanced.contrast-c .topic-hero-image {
  max-width: 320px;
  justify-self: end;
}

.page-enhanced.contrast-c .topic-hero-image .hero-image {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 24px 44px rgba(0, 0, 0, 0.28);
}

.page-enhanced.contrast-c .subpage-main {
  background: var(--color-cloud);
}

.page-enhanced.contrast-c .subpage-main .container {
  max-width: 880px;
  margin: 8px auto 8px;
  background: var(--color-snow);
  border-radius: 20px;
  padding: 30px 36px 48px;
  box-shadow: var(--shadow-soft);
  padding-bottom: 0;
}

.page-enhanced.contrast-c .speaker-section {
  padding: 0;
  margin-top: 24px;
}

.page-enhanced.contrast-c .speaker-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
  padding-bottom: 40px;
}

.page-enhanced.contrast-c .speaker-media {
  display: grid;
  justify-items: center;
  gap: 20px;
}

.page-enhanced.contrast-c .speaker-photo {
  width: 200px;
  height: 200px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.16);
}

.page-enhanced.contrast-c .speaker-meta {
  text-align: center;
}

.page-enhanced.contrast-c .speaker-name {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-midnight);
  line-height: 1.18;
}

.page-enhanced.contrast-c .speaker-role {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 10px;
  margin-top: 6px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-link);
  background: #e6ecff;
}

.page-enhanced.contrast-c .speaker-description {
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--color-ink);
  line-height: 1.62;
  font-size: 16px;
  letter-spacing: 0.003em;
}

.page-enhanced.contrast-c .speaker-description p {
  margin: 0;
  text-align: justify;
}

.page-enhanced.contrast-c .speaker-link,
.page-enhanced.contrast-c .speaker-a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-enhanced.contrast-c .speaker-link:hover,
.page-enhanced.contrast-c .speaker-a:hover {
  color: var(--color-link-hover);
}

.page-enhanced.contrast-c .talk-section {
  /*margin-top: 40px;*/
  padding-top: 32px;
  border-top: 1px solid #d7def4;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-enhanced.contrast-c .talk-heading {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-enhanced.contrast-c .talk-label {
  font-size: 0.85rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.page-enhanced.contrast-c .talk-topic {
  font-size: clamp(1.5rem, 2.8vw, 1.9rem);
  font-weight: 700;
  color: var(--color-midnight);
  line-height: 1.28;
}

.page-enhanced.contrast-c .talk-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  color: var(--color-ink);
  font-size: 16px;
  line-height: 1.76;
}

.page-enhanced.contrast-c .talk-content p {
  margin: 0;
}

.page-enhanced.contrast-c .back-to-top {
  right: 32px;
  bottom: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-link), #784bff);
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.22);
}

.page-enhanced.contrast-c .back-to-top:hover {
  background: #101739;
}

.page-enhanced.contrast-c .back-to-top svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 1024px) {
  .page-enhanced.contrast-c .topic-hero-content {
    grid-template-columns: minmax(0, 1fr) 280px;
  }

  .page-enhanced.contrast-c .subpage-main .container {
    margin-top: -44px;
    padding: 40px 44px 60px;
  }

  .page-enhanced.contrast-c .speaker-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 32px;
    padding-bottom: 0;
  }
}

@media (max-width: 840px) {
  .page-enhanced.contrast-c .topic-hero-content {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-enhanced.contrast-c .topic-hero-image {
    justify-self: stretch;
  }

  .page-enhanced.contrast-c .subpage-main .container {
    margin-top: -36px;
    padding: 36px 32px 56px;
  }

  .page-enhanced.contrast-c .speaker-layout {
    grid-template-columns: 1fr;
  }

  .page-enhanced.contrast-c .speaker-media {
    justify-items: start;
    grid-template-columns: auto 1fr;
  }

  .page-enhanced.contrast-c .speaker-photo {
    width: 180px;
    height: 180px;
  }

  .page-enhanced.contrast-c .speaker-meta {
    text-align: left;
    align-self: center;
  }
}

@media (max-width: 640px) {
  .page-enhanced.contrast-c .topic-hero-section {
    padding: 80px 0 40px;
    margin-top: 0;
  }

  .page-enhanced.contrast-c .topic-hero-content {
    padding: 0 18px;
  }

  .page-enhanced.contrast-c .topic-main-title {
    font-size: 2rem;
    margin-bottom: 8px;
  }

  .page-enhanced.contrast-c .topic-subtitle {
    font-size: 1rem;
    margin-bottom: 12px;
  }

  .page-enhanced.contrast-c .topic-hero-image {
    display: none;
  }

  .page-enhanced.contrast-c .subpage-main .container {
    padding: 28px 22px 52px;
  }

  .page-enhanced.contrast-c .speaker-media {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .page-enhanced.contrast-c .speaker-meta {
    text-align: center;
  }

  .page-enhanced.contrast-c .speaker-description {
    font-size: 1rem;
    line-height: 1.75;
  }

  .page-enhanced.contrast-c .talk-topic {
    font-size: 1.5rem;
  }

  .page-enhanced.contrast-c .talk-content {
    font-size: 1rem;
    line-height: 1.72;
  }

  .page-enhanced.contrast-c .back-to-top {
    right: 20px;
    bottom: 24px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  .page-enhanced.contrast-c .subpage-main .container {
    padding: 24px 18px 44px;
    border-radius: 20px;
    padding-bottom: 0;
  }

  .page-enhanced.contrast-c .speaker-photo {
    width: 160px;
    height: 160px;
  }

  .page-enhanced.contrast-c .speaker-name {
    font-size: 1.8rem;
  }

  .page-enhanced.contrast-c .speaker-role {
    font-size: 0.9rem;
  }

  .page-enhanced.contrast-c .talk-section {
    padding-top: 32px;
  }
}