.official-links-section {
  padding: 28px 0 29px;
  background:
    radial-gradient(circle at 94% 20%, rgba(185, 133, 232, 0.07), transparent 27%),
    linear-gradient(180deg, #fff 0%, #fcf9fe 100%);
}

.official-links-shell {
  width: 100%;
  max-width: none;
  margin: 0 auto;
}

.official-links-intro {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 18px;
}

.official-links-intro h2 {
  margin: 0;
  color: #564b62;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.official-links-intro h2 span {
  margin-right: 7px;
  color: #b985e8;
  filter: drop-shadow(0 0 4px rgba(185, 133, 232, 0.3));
}

.official-links-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(30px, 5vw, 64px);
  border-top: 1px solid rgba(126, 99, 145, 0.13);
}

.official-link-card {
  --official-accent: #8e69a7;
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) auto;
  gap: 17px;
  align-items: center;
  min-width: 0;
  min-height: 126px;
  padding: 18px 4px;
  border-bottom: 1px solid rgba(126, 99, 145, 0.13);
  color: #453b4c;
  text-decoration: none;
  transition: color 180ms ease, padding 180ms ease, background 180ms ease;
}

.official-link-card--bilibili { --official-accent: #3ea8c8; }
.official-link-card--youtube { --official-accent: #e14c5a; }
.official-link-card--club { --official-accent: #a866bc; }
.official-link-card--x { --official-accent: #78658c; }

.official-link-card:hover,
.official-link-card:focus-visible {
  padding-left: 10px;
  color: var(--official-accent);
  background: linear-gradient(90deg, color-mix(in srgb, var(--official-accent) 7%, transparent), transparent 72%);
}

.official-link-card:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--official-accent) 38%, transparent);
  outline-offset: 3px;
  border-radius: 12px;
}

.official-link-icon {
  display: block;
  width: 84px;
  height: 84px;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.94);
  border-radius: 50%;
  background: #eee8f2 var(--image-placeholder) center / cover no-repeat;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--official-accent) 10%, transparent);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.official-link-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 220ms ease, transform 220ms ease;
}

.official-link-icon img.is-loaded {
  opacity: 1;
}

.official-link-card:hover .official-link-icon,
.official-link-card:focus-visible .official-link-icon {
  transform: scale(1.05);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--official-accent) 17%, transparent);
}

.official-link-copy {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.official-link-copy strong {
  overflow: hidden;
  font-family: 'Quicksand', 'Noto Sans SC', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.official-link-copy small {
  overflow: hidden;
  color: #918696;
  font-size: 0.72rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.official-link-arrow {
  margin-right: 6px;
  color: var(--official-accent);
  font-size: 1rem;
  opacity: 0.7;
  transition: transform 180ms ease, opacity 180ms ease;
}

.official-link-card:hover .official-link-arrow,
.official-link-card:focus-visible .official-link-arrow {
  transform: translate(3px, -3px);
  opacity: 1;
}

@media (max-width: 700px) {
  .official-links-section {
    padding: 12px 0 30px;
  }

  .official-links-intro {
    display: block;
    margin-bottom: 16px;
  }

  .official-links-grid {
    grid-template-columns: 1fr;
  }

  .official-link-card {
    grid-template-columns: 68px minmax(0, 1fr) auto;
    min-height: 102px;
    padding: 14px 2px;
  }

  .official-link-icon {
    width: 68px;
    height: 68px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .official-link-card,
  .official-link-icon,
  .official-link-icon img,
  .official-link-arrow {
    transition: none;
  }
}

/* === 更多官方渠道 (移动端折叠) === */
.official-links-more {
  display: none;
  margin-top: 4px;
  padding-top: 0;
}

.official-links-more-summary {
  display: block;
  text-align: right;
  cursor: pointer;
  list-style: none;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: rgba(74, 56, 90, 0.5);
  padding: 4px 2px;
  user-select: none;
  text-transform: uppercase;
}

.official-links-more-summary::-webkit-details-marker {
  display: none;
}

.official-links-more-summary::before {
  content: "+ ";
  display: inline-block;
  margin-right: 4px;
  font-weight: 400;
  letter-spacing: 0;
  transition: transform 180ms ease;
}

.official-links-more[open] .official-links-more-summary::before {
  content: "− ";
}

@media (max-width: 700px) {
  /* 桌面端隐藏折叠; 移动端隐藏 #4 #5 卡片, open 后展开 */
  .official-links-more {
    display: block;
  }

  .official-links-grid .official-link-card:nth-child(n+4) {
    display: none;
  }

  .official-links-shell:has(.official-links-more[open]) .official-link-card:nth-child(n+4) {
    display: flex;
  }

  .official-links-shell:has(.official-links-more[open]) .official-links-more {
    margin-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .official-links-more-summary::before {
    transition: none;
  }
}

/* Desktop variant used inside the paired home information deck. */
@media (min-width: 901px) {
  .home-info-deck .official-links-section {
    padding-left: 24px;
    padding-right: 48px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .home-info-deck .official-links-section::before {
    content: none;
  }

  .home-info-deck .official-links-intro {
    margin-bottom: 12px;
  }

  .home-info-deck .official-links-intro h2 {
    color: #745281;
    font-size: 1.03rem;
  }

  .home-info-deck .official-links-grid {
    border-top-color: rgba(168, 105, 204, 0.2);
  }

  .home-info-deck .official-links-grid {
    grid-template-columns: 1fr;
    column-gap: 0;
  }

  .home-info-deck .official-link-card {
    grid-template-columns: 64px minmax(0, 1fr) auto;
    gap: 14px;
    min-height: 80px;
    padding: 7px 2px;
    border-bottom-color: rgba(147, 91, 190, 0.13);
  }

  .home-info-deck .official-link-card:last-child {
    border-bottom: 0;
  }

  .home-info-deck .official-link-icon {
    width: 64px;
    height: 64px;
  }

  .home-info-deck .official-link-copy strong {
    font-size: 0.94rem;
  }
}