/* 网络研讨会 - webinar.html */

.site-main--wb .nc-breadcrumb [aria-current="page"] {
  color: var(--nc-text);
}

.wb-main {
  padding-top: clamp(8px, 0.833vw, 16px);
}

.wb-section-title {
  margin: 0 0 clamp(28px, 2.5vw, 48px);
  font-size: clamp(24px, 1.875vw, 36px);
  font-weight: 600;
  line-height: 1.3;
  color: var(--nc-text);
}

.wb-main__layout {
  /* 侧栏略窄，为右侧 3 列卡片留出空间（设计稿约 336×3 + gutter） */
  grid-template-columns: minmax(180px, 260px) minmax(0, 1fr);
  gap: clamp(28px, 3.125vw, 60px);
}

.wb-sidebar .wb-filter + .wb-filter {
  margin-top: clamp(20px, 1.667vw, 32px);
}

.wb-sidebar .wb-filter .nc-sidebar__panel {
  max-height: 520px;
}

.wb-sidebar .wb-filter .nc-sidebar__panel.is-collapsed {
  max-height: 0;
}

/* ========== Card grid ========== */

.wb-list-wrap {
  min-width: 0;
}

.wb-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 2.5vw, 48px) clamp(20px, 1.875vw, 36px);
}

.wb-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
}

.wb-card__media {
  overflow: hidden;
  background: #f0f0f0;
}

.wb-card__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 336 / 233;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.wb-card__link:hover .wb-card__media img {
  transform: scale(1.03);
}

.wb-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  padding: clamp(16px, 1.25vw, 24px) 0 clamp(20px, 1.667vw, 32px);
  border-bottom: 1px solid var(--nc-line);
  transition: border-color 0.25s ease;
}

.wb-card__link:hover .wb-card__body {
  border-bottom-color: var(--nc-primary);
}

.wb-card__title {
  margin: 0;
  font-size: clamp(15px, 0.9375vw, 18px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--nc-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}

.wb-card__link:hover .wb-card__title {
  color: var(--nc-primary);
}

.wb-card__excerpt {
  margin: clamp(10px, 0.833vw, 16px) 0 0;
  font-size: clamp(13px, 0.8333vw, 16px);
  line-height: 1.7;
  color: var(--nc-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.wb-card__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  margin-top: clamp(16px, 1.25vw, 24px);
  border-radius: 50%;
  background: #dddddd;
  transition: background 0.25s ease;
}

.wb-card__link:hover .wb-card__arrow {
  background: var(--nc-primary);
}

.wb-card__arrow img {
  width: auto;
  height: clamp(8px, 0.521vw, 10px);
  filter: brightness(0) invert(1);
}

/* ========== Responsive ========== */

@media (max-width: 991px) {
  .wb-main__layout {
    grid-template-columns: 1fr;
  }

  .wb-sidebar {
    max-width: 360px;
  }

  .wb-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .wb-grid {
    grid-template-columns: 1fr;
  }
}