/* ==========================================================================
   浏览模式 · 公开影像馆
   ---------------------------------------------------------------------------
   为低端手机做的取舍：
     · 网格统一 4:3 + object-fit:cover，不用瀑布流（瀑布流要 JS 算高度，滚动会掉帧）
     · content-visibility:auto + contain-intrinsic-size：屏幕外的卡片不参与渲染
     · 图片一律 srcset + loading=lazy + decoding=async，非高清屏只下 240/400
     · 只有一个小脚本（browse.js），没有前端框架
     · html[data-lite=1] 时关掉毛玻璃、光晕与动画
   ========================================================================== */

/* ---------------------------------------------------------- 公开导航 */
.nav--public { position: sticky; top: 0; z-index: 50; }
html { --nav-h: 62px; }
@media (max-width: 640px) { html { --nav-h: 54px; } }
.nav__mode {
  font-size: 11px;
  letter-spacing: .08em;
  padding: .3em .7em;
  border-radius: 999px;
  color: #06231f;
  background: linear-gradient(120deg, #ffcf7a, #7dffd8);
  font-weight: 800;
}

/* ---------------------------------------------------------- 封面 */
.bhero {
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(40px, 8vh, 84px) clamp(18px, 4vw, 44px) clamp(18px, 3vw, 28px);
  overflow: hidden;
}
.bhero__glow {
  position: absolute;
  top: -30%;
  left: 50%;
  width: 70vw;
  height: 70vw;
  max-width: 760px;
  max-height: 760px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--c-primary) 26%, transparent), transparent 62%);
  filter: blur(70px);
  pointer-events: none;
}
.bhero__inner { position: relative; }
.bhero__kicker {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  font-size: 12px;
  letter-spacing: .14em;
  color: color-mix(in srgb, var(--c-accent) 70%, white);
  padding: .42em 1em;
  border-radius: 999px;
  background: color-mix(in srgb, var(--c-accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--c-accent) 30%, transparent);
}
.bhero__title {
  margin: 18px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.16;
  color: #fff;
  text-wrap: balance;
}
.bhero__desc {
  max-width: 54ch;
  font-size: clamp(.9rem, 1.3vw, 1.02rem);
  color: var(--t-2);
  line-height: 1.85;
}
.bhero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(18px, 3vw, 26px) 0 clamp(16px, 3vw, 22px);
}
.bhero__stats li {
  min-width: 92px;
  padding: 10px 16px;
  border-radius: 16px;
  background: var(--glass-1);
  border: 1px solid var(--stroke-1);
}
.bhero__stats b {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}
.bhero__stats span { font-size: .72rem; color: var(--t-3); letter-spacing: .04em; }
.bhero__date b { font-size: 1rem; }

/* 搜索 */
.bsearch {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 660px;
}
.bsearch__icon { position: absolute; left: 18px; font-size: 15px; opacity: .5; pointer-events: none; }
.bsearch__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 15px 18px 15px 46px;
  font-size: 15px;
  font-family: inherit;
  color: #fff;
  background: rgba(255, 255, 255, .1);
  border: 1.5px solid var(--stroke-1);
  border-radius: 999px;
  outline: none;
  transition: border-color .3s ease, background .3s ease;
}
.bsearch__input::placeholder { color: var(--t-4); }
.bsearch__input:focus {
  border-color: color-mix(in srgb, var(--c-primary) 60%, transparent);
  background: rgba(255, 255, 255, .16);
}

/* ---------------------------------------------------------- 筛选条（吸顶） */
.btools {
  position: sticky;
  top: var(--nav-h, 62px);
  z-index: 40;
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px clamp(18px, 4vw, 44px);
  background: linear-gradient(180deg, rgba(4, 18, 22, .92), rgba(4, 18, 22, .72));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(255, 255, 255, .07);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.btools__row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.btabs { display: flex; gap: 4px; flex-wrap: wrap; }
.btab {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .5em 1em;
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--t-2);
  transition: background .25s ease, color .25s ease;
}
.btab em {
  font-style: normal;
  font-size: 10.5px;
  padding: 1px 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .12);
  color: var(--t-3);
}
.btab:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.btab.is-active {
  color: #06231f;
  background: linear-gradient(120deg, #7dffd8, #bfe9ff);
  font-weight: 800;
}
.btab.is-active em { background: rgba(6, 35, 31, .18); color: #06231f; }

.bsort select {
  font-family: inherit;
  font-size: 13px;
  color: var(--t-2);
  background: rgba(255, 255, 255, .08);
  border: 1px solid var(--stroke-1);
  border-radius: 999px;
  padding: .45em 1.6em .45em .95em;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 15px) 55%, calc(100% - 10px) 55%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  cursor: pointer;
}

.bchips {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin-top: 10px;
  align-items: center;
}
.bchips__label { font-size: 11.5px; color: var(--t-4); letter-spacing: .08em; }
.bchips .chip { font-size: 12px; padding: .35em .8em; }
.bchips .chip em {
  font-style: normal;
  margin-left: .4em;
  font-size: 10px;
  opacity: .6;
}
.bchips .chip.is-active {
  color: #06231f;
  background: color-mix(in srgb, var(--c-accent) 78%, white);
  border-color: transparent;
  font-weight: 700;
}

/* ---------------------------------------------------------- 网格 */
.bgridwrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(18px, 3vw, 28px) clamp(18px, 4vw, 44px) clamp(40px, 7vw, 80px);
}
.bgridwrap__head { margin-bottom: 14px; }
.bresult { font-size: 13px; color: var(--t-3); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.bresult b { color: var(--c-accent); }
.bresult__tag {
  font-size: 11.5px;
  padding: .22em .7em;
  border-radius: 999px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid var(--stroke-1);
}
.bresult__clear { font-size: 12px; color: color-mix(in srgb, var(--c-primary) 74%, white); border-bottom: 1px dashed currentColor; }

.bgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 208px), 1fr));
  gap: clamp(10px, 1.4vw, 16px);
}

.bcard {
  position: relative;
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .1);
  cursor: zoom-in;
  transition: transform .4s var(--ease), border-color .3s ease, box-shadow .4s var(--ease);
  /* 屏幕外的卡片不参与渲染，长列表滚动更稳 */
  content-visibility: auto;
  contain-intrinsic-size: 0 240px;
}
.bcard:hover { transform: translateY(-4px); border-color: rgba(255, 255, 255, .26); box-shadow: 0 24px 50px -28px rgba(0, 0, 0, .9); }
.bcard:focus-visible { outline: 2.5px solid var(--c-primary); outline-offset: 3px; }

.bcard__frame {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: rgba(255, 255, 255, .04);
}
.bcard__img,
.bcard__lqip {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.bcard__lqip {
  filter: blur(14px) saturate(1.2);
  transform: scale(1.08);
  transition: opacity .45s ease;
  z-index: 0;
}
.bcard__img { z-index: 1; opacity: 0; transition: opacity .45s ease, transform .8s var(--ease); }
.bcard.is-loaded .bcard__img { opacity: 1; }
.bcard.is-loaded .bcard__lqip { opacity: 0; }
.bcard:hover .bcard__img { transform: scale(1.05); }

.bcard__play {
  position: absolute;
  z-index: 2;
  left: 50%;
  top: 50%;
  width: 44px;
  height: 44px;
  margin: -22px 0 0 -22px;
  border-radius: 50%;
  background: rgba(4, 18, 22, .55);
  border: 1px solid rgba(255, 255, 255, .5);
  backdrop-filter: blur(6px);
}
.bcard__play::after {
  content: "";
  position: absolute;
  left: 17px;
  top: 13px;
  border-left: 12px solid #fff;
  border-top: 9px solid transparent;
  border-bottom: 9px solid transparent;
}
.bcard__dur,
.bcard__live {
  position: absolute;
  z-index: 2;
  right: 8px;
  bottom: 8px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .04em;
  padding: .2em .55em;
  border-radius: 6px;
  background: rgba(4, 18, 22, .72);
  color: #fff;
}
.bcard__live { right: auto; left: 8px; top: 8px; bottom: auto; background: linear-gradient(120deg, #ffcf7a, #7dffd8); color: #06231f; }

.bcard__meta {
  padding: 9px 12px 11px;
  background: linear-gradient(180deg, rgba(4, 18, 22, .4), rgba(4, 18, 22, .8));
  border-top: 1px solid rgba(255, 255, 255, .06);
}
.bcard__meta b {
  display: block;
  font-size: .86rem;
  font-weight: 700;
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bcard__meta span {
  display: block;
  margin-top: 2px;
  font-size: .7rem;
  color: var(--t-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------------------------------------------------------- 加载更多 / 空状态 */
.bmore { display: grid; justify-items: center; gap: 10px; margin-top: clamp(22px, 4vw, 36px); }
.bmore__hint, .bmore__end { font-size: 12px; color: var(--t-4); letter-spacing: .04em; }

.bempty {
  display: grid;
  justify-items: center;
  gap: 10px;
  padding: clamp(40px, 8vw, 80px) 20px;
  text-align: center;
  border-radius: 22px;
  border: 1px dashed rgba(255, 255, 255, .14);
  background: rgba(255, 255, 255, .03);
}
.bempty__icon { font-size: 40px; opacity: .7; }
.bempty h3 { font-size: 1.05rem; color: #fff; }
.bempty p { font-size: .88rem; color: var(--t-3); }

/* ---------------------------------------------------------- 页脚 */
.bfoot {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(18px, 4vw, 44px) clamp(40px, 7vw, 70px);
  text-align: center;
  display: grid;
  gap: 10px;
  justify-items: center;
}
.bfoot__hint { font-size: .86rem; color: var(--t-3); }
.bfoot__links { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; align-items: center; }
.bfoot__admin {
  font-size: 11.5px;
  color: var(--t-4);
  border-bottom: 1px dashed rgba(255, 255, 255, .22);
  padding-bottom: 1px;
  transition: color .25s ease, border-color .25s ease;
}
.bfoot__admin:hover { color: var(--t-2); border-color: var(--t-2); }
.bfoot small { font-size: .7rem; color: var(--t-4); letter-spacing: .06em; }

/* ---------------------------------------------------------- 查看器 */
.bviewer { position: fixed; inset: 0; z-index: 120; display: grid; place-items: center; }
.bviewer[hidden] { display: none; }
.bviewer__mask { position: absolute; inset: 0; background: rgba(2, 8, 11, .94); }
.bviewer__box {
  position: relative;
  margin: 0;
  max-width: min(1100px, 94vw);
  max-height: 94vh;
  display: grid;
  justify-items: center;
  gap: 10px;
}
.bviewer__media { display: grid; place-items: center; }
.bviewer__media img,
.bviewer__media video {
  max-width: 100%;
  max-height: 80vh;
  border-radius: 14px;
  background: #000;
}
.bviewer figcaption { font-size: 12.5px; color: rgba(255, 255, 255, .78); text-align: center; }
.bviewer__close,
.bviewer__nav {
  position: absolute;
  z-index: 2;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .26);
  background: rgba(255, 255, 255, .14);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  backdrop-filter: blur(8px);
}
.bviewer__close { top: -50px; right: 0; }
.bviewer__nav { top: 50%; margin-top: -21px; font-size: 24px; }
.bviewer__nav--prev { left: -52px; }
.bviewer__nav--next { right: -52px; }
.bviewer__close:hover,
.bviewer__nav:hover { background: rgba(255, 255, 255, .26); }

/* ---------------------------------------------------------- 手机端 */
@media (max-width: 640px) {
  .btools { top: 52px; padding: 10px 16px; }
  .btabs { gap: 2px; }
  .btab { padding: .45em .8em; font-size: 13px; }
  .btab em { display: none; }
  .bgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .bcard { border-radius: 13px; }
  .bcard__meta { padding: 7px 9px 9px; }
  .bcard__meta b { font-size: .78rem; }
  .bcard__meta span { font-size: .64rem; }
  .bcard__play { width: 36px; height: 36px; margin: -18px 0 0 -18px; }
  .bcard__play::after { left: 13px; top: 11px; border-left-width: 10px; border-top-width: 7px; border-bottom-width: 7px; }
  .bviewer__nav--prev { left: -4px; }
  .bviewer__nav--next { right: -4px; }
  .bviewer__nav { width: 36px; height: 36px; font-size: 20px; }
  .bviewer__close { top: -44px; }
  /* 手机上把统计压成一行，减少首屏高度（低端机更少滚动） */
  .bhero__stats { gap: 8px; }
  .bhero__stats li { min-width: 0; flex: 1 1 calc(25% - 8px); padding: 8px 10px; border-radius: 12px; }
  .bhero__stats b { font-size: 1.05rem; }
  .bhero__stats span { font-size: .63rem; letter-spacing: 0; }
  .bhero__date b { font-size: .8rem; }
  .bhero { padding-top: 26px; }
  .bhero__title { margin: 12px 0 8px; }
  .bsearch { gap: 8px; }
  .bsearch__input { padding: 13px 16px 13px 42px; font-size: 14px; }
  .bsearch .btn { padding: .7em 1.1em; font-size: 14px; }
}

/* ---------------------------------------------------------- 低端机 / 省流量 / 省电 */
html[data-lite="1"] .btools,
html[data-lite="1"] .bcard__play,
html[data-lite="1"] .bviewer__close,
html[data-lite="1"] .bviewer__nav {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}
html[data-lite="1"] .btools { background: rgba(4, 18, 22, .96); }
html[data-lite="1"] .bhero__glow { display: none; }
html[data-lite="1"] .bcard { transition: none; }
html[data-lite="1"] .bcard:hover { transform: none; }
html[data-lite="1"] .bcard__lqip { filter: none; }
html[data-lite="1"] .bcard__img { transition: opacity .2s linear; }
html[data-lite="1"] .bcard:hover .bcard__img { transform: none; }

@media (prefers-reduced-motion: reduce) {
  .bcard, .bcard__img, .bcard__lqip, .bhero__glow { transition: none !important; animation: none !important; }
  .bcard:hover { transform: none; }
}