.page-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.page-nav__inner {
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.page-nav__back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--on-accent);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  box-shadow: 0 6px 16px rgba(0, 113, 227, 0.22);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    transform 0.15s var(--ease), box-shadow 0.2s var(--ease);
}
.page-nav__back svg { width: 16px; height: 16px; }
.page-nav__back:hover {
  background: var(--accent-strong);
  color: var(--on-accent);
  box-shadow: 0 8px 20px rgba(0, 102, 204, 0.28);
  text-decoration: none;
}
.page-nav__back:active { transform: scale(0.96); }

.page-main {
  padding: 56px clamp(24px, 5vw, 88px) 128px;
}
body[data-collection="gallery"] .page-main,
body[data-collection="articles"] .page-main,
body[data-collection="projects"] .page-main {
  padding: 28px clamp(24px, 5vw, 88px) 128px;
}
body[data-collection="gallery"] .page-nav__inner,
body[data-collection="articles"] .page-nav__inner,
body[data-collection="projects"] .page-nav__inner {
  padding: 0 clamp(24px, 5vw, 88px);
}

.page-hero { margin-bottom: 48px; }
body[data-collection="gallery"] .page-hero,
body[data-collection="articles"] .page-hero,
body[data-collection="projects"] .page-hero { margin-bottom: 36px; }
.page-hero__title {
  margin-top: 8px;
  font-size: clamp(34px, 6vw, 52px);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.1;
}
body[data-collection="gallery"] .page-hero__title,
body[data-collection="articles"] .page-hero__title,
body[data-collection="projects"] .page-hero__title {
  margin-top: 0;
  font-size: clamp(30px, 5vw, 46px);
}
.page-hero__desc { margin-top: 16px; font-size: 19px; color: var(--text-2); }
body[data-collection="gallery"] .page-hero__desc,
body[data-collection="articles"] .page-hero__desc,
body[data-collection="projects"] .page-hero__desc {
  margin-top: 8px;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--text-3);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
body[data-collection="gallery"] .page-main,
body[data-collection="articles"] .page-main,
body[data-collection="projects"] .page-main { max-width: none; margin: 0; }
body[data-collection="projects"] .project { height: auto; min-height: 0; aspect-ratio: 4 / 3; padding: 28px 30px; display: flex; flex-direction: column; justify-content: flex-start; }
body[data-collection="projects"] .project h3 { font-size: 20px; }
body[data-collection="projects"] .project p { font-size: 15px; }
/* 项目页 / 文章页：一行 6 个卡片（窗口变窄时自动减少列数），内边距与字号同步 */
body[data-collection="projects"] .gallery-grid,
body[data-collection="articles"] .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 18px; }
body[data-collection="projects"] .project { padding: 16px 18px; }
body[data-collection="projects"] .project h3 { font-size: 15px; }
body[data-collection="projects"] .project p { font-size: 12.5px; line-height: 1.6; }
body[data-collection="articles"] .article-card__body { padding: 12px 14px 14px; gap: 3px; }
body[data-collection="articles"] .article-card__title { font-size: 15px; }
body[data-collection="articles"] .article-card__date { font-size: 10px; }
body[data-collection="articles"] .article-card__tag { padding: 1px 6px; font-size: 9px; }
body[data-collection="articles"] .article-card__excerpt { font-size: 12.5px; line-height: 1.55; -webkit-line-clamp: 2; }
.media-section { margin-top: 42px; }
.media-section:first-of-type { margin-top: 0; }
.media-section--video { margin-top: 0 !important; padding-top: 0 !important; border: 0 !important; border-top: 0 !important; }
.media-section[hidden] { display: none !important; }
.media-tabs { display: flex; gap: 8px; margin: 0 0 22px; }
.media-tab { border: 1px solid var(--border); border-radius: var(--radius-pill); padding: 8px 18px; background: var(--bg); color: var(--text-2); cursor: pointer; font: inherit; font-size: 14px; }
.media-tab:hover, .media-tab.is-active { border-color: var(--accent); background: var(--accent); color: #fff; }
.gallery-grid--videos { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.gallery-item--video .gallery-item__media { aspect-ratio: 4 / 3; }
.gallery-item__media video { width: 100%; height: 100%; display: block; object-fit: contain; background: #101114; }
.gallery-item__caption { padding: 12px 4px 0; color: var(--text-2); font-size: 14px; line-height: 1.6; }
.gallery-item { margin: 0; }
.gallery-item__media {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-alt);
  box-shadow: 0 1px 0 var(--border), 0 10px 34px rgba(0, 0, 0, 0.06);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.gallery-item:hover .gallery-item__media {
  transform: translateY(-10px);
  box-shadow: 0 30px 64px rgba(0, 0, 0, 0.17), 0 1px 0 var(--border);
}
.gallery-item__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  cursor: zoom-in;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.6s var(--ease-out);
}
.gallery-item:hover .gallery-item__media img { transform: scale(1.05); }
.gallery-item.is-loaded .gallery-item__media img { opacity: 1; }
.gallery-item__ph {
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-3);
}

.gallery-item__overlay {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 44px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.66), rgba(0, 0, 0, 0));
  color: #fff;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  pointer-events: none;
}
.gallery-item:hover .gallery-item__overlay {
  opacity: 1;
  transform: translateY(0);
}
.gallery-item__overlay-title { font-size: 16px; font-weight: 600; }
.gallery-item__overlay-desc { font-size: 13px; opacity: 0.92; }

.article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 1px 0 var(--border), 0 10px 34px rgba(0, 0, 0, 0.06);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.article-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 64px rgba(0, 0, 0, 0.17), 0 1px 0 var(--border);
}
.article-card:active { transform: translateY(-1px) scale(0.995); }
.article-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--bg-alt);
  overflow: hidden;
}
.article-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease-out);
}
.article-card:hover .article-card__media img { transform: scale(1.05); }
.article-card__ph {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
}
.article-card__ph svg { width: 32px; height: 32px; }
.article-card__body {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 22px 24px 24px;
  align-items: flex-start;
}
.article-card__title {
  font-size: 21px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

a.article-card,
a.article-card:hover { color: inherit; text-decoration: none; }
.article-card__date {
  display: inline-block;
  margin-top: 2px;
  font-size: 12px;
  color: var(--text-3);
}
.article-card__tags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 3px; }
.article-card__tag { padding: 2px 7px; font-size: 10px; border-radius: var(--radius-pill); background: var(--bg-alt); color: var(--text-2); }
.article-card__media { aspect-ratio: 4 / 3; }
.article-card__excerpt { margin: 0; color: var(--text-2); font-size: 14px; line-height: 1.65; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.page-hero--inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.page-hero--inline .article-search { flex: 0 0 auto; }
.article-search {
  position: relative;
  width: min(340px, 100%);
}
.article-search svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-3);
  pointer-events: none;
}
.article-search input {
  width: 100%;
  padding: 11px 16px 11px 42px;
  font-size: 15px;
  color: var(--text);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  outline: none;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease),
    background-color 0.2s var(--ease);
}
.article-search input:hover { border-color: var(--text-3); }
.article-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.article-search input::placeholder { color: var(--text-3); }

@media (max-width: 900px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .gallery-grid--videos { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .page-main { padding: 40px 20px 80px; }
  body[data-collection="gallery"] .page-main,
  body[data-collection="articles"] .page-main,
  body[data-collection="projects"] .page-main { padding: 28px 20px 80px; }
  .gallery-grid { grid-template-columns: 1fr; gap: 20px; }
  .page-hero--inline { flex-direction: column; align-items: stretch; gap: 16px; }
  .page-hero--inline .article-search { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .gallery-item__media,
  .gallery-item:hover .gallery-item__media,
  .article-card,
  .article-card:hover,
  .project,
  .project:hover { transition: none; transform: none; }
  .gallery-item__media img { transition: none; opacity: 1; }
}