/* ==========================================================================
   山野拾光 · 个人作品集（图片 + 视频双板块）
   雾白纸感 + 森林绿强调 · 纯静态 · 零依赖 · file:// 可直接打开

   1. 设计 token     2. Reset & 基础    3. Header & Hero
   4. 统计条          5. 章节头部        6. 图片瀑布流
   7. 视频板块        8. 关于 & 联系     9. 页脚
   10. 灯箱           11. 动效           12. 响应式
   ========================================================================== */

/* ==================== 1. 设计 token ==================== */
:root {
  --bg:            #F7F6F3;
  --bg-subtle:     #EFEEE9;
  --header-bg:     rgba(247, 246, 243, .85);
  --ink:           #1D1F1C;
  --ink-2:         #585B54;
  --ink-3:         #92948C;
  --line:          #E4E3DC;
  --line-strong:   #CFCDC4;
  --card-bg:       #FFFFFF;

  --accent:        #3A6B51;
  --accent-deep:   #2C523E;
  --accent-soft:   rgba(58, 107, 81, .09);
  --on-accent:     #FFFFFF;

  /* 视频封面遮罩下的常亮色 */
  --overlay-ink:   #FFFFFF;

  --space-2: 8px;  --space-3: 12px; --space-4: 16px; --space-5: 24px;
  --space-6: 32px; --space-7: 48px; --space-8: 64px; --space-9: 96px;
  --space-10: 128px;

  --maxw: 1240px;
  --pad-x: clamp(20px, 5vw, 64px);
  --radius: 4px;
  --header-h: 64px;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --ease: cubic-bezier(.2, .6, .2, 1);
  --dur-fast: 200ms;
  --dur-mid:  340ms;
  --dur-slow: 560ms;

  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg:            #101311;
  --bg-subtle:     #171C18;
  --header-bg:     rgba(16, 19, 17, .85);
  --ink:           #EFF0EC;
  --ink-2:         #A6AAA2;
  --ink-3:         #6F736B;
  --line:          #242923;
  --line-strong:   #363C35;
  --card-bg:       #1A1F1B;

  --accent:        #8CC4A4;
  --accent-deep:   #A7D6BC;
  --accent-soft:   rgba(140, 196, 164, .12);
  --on-accent:     #101311;

  color-scheme: dark;
}

/* ==================== 2. Reset & 基础 ==================== */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--space-5));
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease);
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.3; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: var(--on-accent);
  padding: 8px 16px; z-index: 200;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ==================== 3. Header ==================== */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.site-header__inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-5);
}

.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; letter-spacing: .06em;
}
.brand__mark { color: var(--accent); flex: none; }
.brand__name { font-size: 1.02rem; }

.nav { display: flex; gap: clamp(14px, 2.5vw, 32px); }
.nav__link {
  position: relative;
  font-size: .92rem; color: var(--ink-2);
  padding-block: 6px; letter-spacing: .08em;
  transition: color var(--dur-fast) var(--ease);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1.5px; background: var(--accent);
  transition: right var(--dur-mid) var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after { right: 0; }

.theme-toggle {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 50%;
  color: var(--ink-2);
  transition: color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}
.theme-toggle:hover { color: var(--ink); background: var(--accent-soft); }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

/* ==================== Hero ==================== */
.hero {
  position: relative;
  min-height: max(86vh, 560px);
  display: flex; align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
}
.hero__media { position: absolute; inset: 0; z-index: -2; }
.hero__media img {
  width: 100%; height: 100%; object-fit: cover;
  transform: scale(1.06);
  will-change: transform;
}
.hero__scrim {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(to top, rgba(10, 14, 11, .78) 0%, rgba(10, 14, 11, .28) 45%, rgba(10, 14, 11, .18) 100%);
}
.hero__content {
  width: 100%;
  padding-block: clamp(56px, 10vh, 110px);
  color: var(--overlay-ink);
}
.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: .8rem; letter-spacing: .34em;
  color: rgba(255, 255, 255, .78);
  margin-bottom: var(--space-4);
}
.hero__title {
  font-size: clamp(2.7rem, 7.5vw, 5.2rem);
  font-weight: 700; letter-spacing: .12em;
  line-height: 1.12;
  text-shadow: 0 2px 24px rgba(0, 0, 0, .35);
}
.hero__sub {
  margin-top: var(--space-4);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: rgba(255, 255, 255, .88);
  text-shadow: 0 1px 12px rgba(0, 0, 0, .3);
}
.hero__meta {
  display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5);
  margin-top: var(--space-6);
  font-family: var(--font-mono);
  font-size: .8rem; letter-spacing: .12em;
  color: rgba(255, 255, 255, .72);
}
.hero__scroll {
  position: absolute; right: clamp(20px, 5vw, 64px); bottom: 28px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255, 255, 255, .75);
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .3em;
}
.hero__scroll-line {
  width: 1px; height: 44px;
  background: linear-gradient(to bottom, rgba(255,255,255,.8), rgba(255,255,255,0));
  animation: drip 2.2s var(--ease) infinite;
}
@keyframes drip {
  0%   { transform: scaleY(0); transform-origin: top; }
  45%  { transform: scaleY(1); transform-origin: top; }
  55%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ==================== 4. 统计条 ==================== */
.stats { border-bottom: 1px solid var(--line); background: var(--bg); }
.stats__grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  padding-block: var(--space-7);
}
.stat { text-align: center; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat__value {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem); font-weight: 700;
  letter-spacing: .04em; color: var(--ink);
}
.stat__unit { font-size: .95rem; font-weight: 400; color: var(--ink-3); margin-left: 4px; }
.stat__label {
  margin-top: 2px;
  font-size: .82rem; letter-spacing: .22em; color: var(--ink-3);
}

/* ==================== 5. 章节头部 ==================== */
.section { padding-block: clamp(72px, 12vh, 128px); }
.section--alt { background: var(--bg-subtle); }

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5) var(--space-6);
  align-items: end;
  margin-bottom: clamp(36px, 6vh, 56px);
}
.section-head__no {
  font-family: var(--font-mono);
  font-size: .85rem; letter-spacing: .2em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 4px 14px;
  white-space: nowrap;
}
.section-head__title {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  letter-spacing: .14em; font-weight: 700;
}
.section-head__title small {
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem; font-weight: 400;
  letter-spacing: .32em; color: var(--ink-3);
  margin-top: 6px;
}
.section-head__desc {
  grid-column: 1 / -1;
  max-width: 640px;
  color: var(--ink-2); font-size: .98rem;
}

/* ==================== 6. 图片板块：胶片走马灯 + 观片台 + 拼贴墙 ==================== */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-block: var(--space-6) var(--space-5);
}
.filter-btn {
  display: inline-flex; align-items: baseline; gap: 7px;
  padding: 7px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: .88rem; letter-spacing: .1em;
  color: var(--ink-2);
  transition: all var(--dur-fast) var(--ease);
}
.filter-btn__count {
  font-family: var(--font-mono);
  font-size: .64rem; letter-spacing: .04em;
  color: var(--ink-3);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn[aria-pressed="true"] {
  background: var(--accent); border-color: var(--accent);
  color: var(--on-accent);
}
.filter-btn[aria-pressed="true"] .filter-btn__count { color: var(--on-accent); opacity: .75; }

/* ---------- 胶片走马灯 ---------- */
/* 深色胶片条不随主题变：胶片本来就是黑的，放进浅色页面反而成为一条"动感分隔带" */
.filmstrip {
  position: relative;
  background: #12140F;
  padding: 30px 0;
  border-block: 1px solid #000;
  overflow: hidden;
  box-shadow: inset 0 0 70px rgba(0, 0, 0, .4);
}
/* 上下两排「齿孔」 */
.filmstrip::before,
.filmstrip::after {
  content: "";
  position: absolute; left: 0; right: 0;
  height: 11px;
  background-image: repeating-linear-gradient(90deg, #2B2F24 0 15px, transparent 15px 31px);
}
.filmstrip::before { top: 9px; }
.filmstrip::after { bottom: 9px; }

.filmstrip__track {
  display: flex;
  width: max-content;
  animation: filmMarquee 70s linear infinite;
}
.filmstrip:hover .filmstrip__track { animation-play-state: paused; }
.filmstrip__reel {
  display: flex; align-items: center;
  gap: var(--space-5);
  padding-inline: var(--space-5);
}
@keyframes filmMarquee { to { transform: translateX(-50%); } }

.frame { flex: none; width: 200px; }
.frame img {
  width: 100%; aspect-ratio: 16 / 10; object-fit: cover;
  border-radius: 1px;
  filter: saturate(.88);
  transition: filter var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.frame:hover img { filter: saturate(1.12); transform: translateY(-2px); }
.frame figcaption {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: .62rem; letter-spacing: .2em;
  text-align: center;
  color: rgba(240, 240, 230, .4);
}

/* ---------- 观片台 ---------- */
.viewer { margin-top: var(--space-4); }

.viewer__stage {
  position: relative;
  height: clamp(340px, 62vh, 680px);
  border-radius: 6px;
  overflow: hidden;
  background: #0D100E;
  box-shadow: 0 18px 54px rgba(15, 20, 16, .2);
  outline: none;
}

/* 双图层交替：旧图离场的同时新图入场，才能做出叠化、推移、缩放、擦除 */
.viewer__layer {
  position: absolute; inset: 0;
  opacity: 0; z-index: 1;
  transition: opacity 1.05s var(--ease),
              transform 1.05s var(--ease),
              filter 1.05s var(--ease),
              clip-path 1.05s var(--ease);
  will-change: opacity, transform;
}
.viewer__layer.is-live { opacity: 1; z-index: 2; }
.viewer__layer.is-entering { opacity: 0; z-index: 3; }
.viewer__layer.is-leaving { opacity: 0; z-index: 1; }
.viewer__layer.no-anim { transition: none !important; }

/* ---- 切换效果：写在图层上，连点翻页时两次切换不会串味 ---- */
/* 叠化：只走透明度（基础态即叠化，无需额外规则） */
/* 推移：新旧图一进一出 */
.viewer__layer.v-slide.is-entering { transform: translateX(6.5%); }
.viewer__layer.v-slide.d-prev.is-entering { transform: translateX(-6.5%); }
.viewer__layer.v-slide.is-leaving { transform: translateX(-5.5%); }
.viewer__layer.v-slide.d-prev.is-leaving { transform: translateX(5.5%); }
/* 缩放：新图从稍大处落定，旧图微缩后退 */
.viewer__layer.v-zoom.is-entering { transform: scale(1.075); }
.viewer__layer.v-zoom.is-leaving { transform: scale(.955); }
/* 柔焦：新图由虚转实 */
.viewer__layer.v-blur.is-entering { filter: blur(14px); transform: scale(1.035); }
.viewer__layer.v-blur.is-leaving { filter: blur(10px); }
/* 擦除：新图从一侧推开旧图 */
.viewer__layer.v-wipe.is-entering {
  opacity: 1;
  clip-path: inset(0 100% 0 0);
  transition-property: clip-path;
}
.viewer__layer.v-wipe.d-prev.is-entering { clip-path: inset(0 0 0 100%); }
.viewer__layer.v-wipe.is-leaving { opacity: 1; }

.viewer__img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
  transform-origin: center;
  backface-visibility: hidden;
  user-select: none;
  -webkit-user-drag: none;
}

/* ---- 单张照片的动态展示（Ken Burns）----
   17 秒慢速走完；自动播放看开头一小段，手动停留则一直缓缓移动 */
.viewer__img.kb-1 { animation: kbPush 17s ease-out forwards; }
.viewer__img.kb-2 { animation: kbPull 17s ease-out forwards; }
.viewer__img.kb-3 { animation: kbPanR 19s ease-out forwards; }
.viewer__img.kb-4 { animation: kbPanL 19s ease-out forwards; }
.viewer__img.kb-5 { animation: kbDrift 21s ease-out forwards; }
.viewer__img.kb-6 { animation: kbSettle 17s ease-out forwards; }
@keyframes kbPush   { from { transform: scale(1.005); } to { transform: scale(1.075); } }
@keyframes kbPull   { from { transform: scale(1.085); } to { transform: scale(1.005); } }
@keyframes kbPanR   { from { transform: scale(1.07) translateX(-1.8%); } to { transform: scale(1.07) translateX(1.8%); } }
@keyframes kbPanL   { from { transform: scale(1.07) translateX(1.8%); } to { transform: scale(1.07) translateX(-1.8%); } }
@keyframes kbDrift  { from { transform: scale(1.04) translate(-1.5%, 1.2%); } to { transform: scale(1.1) translate(1.5%, -1.2%); } }
@keyframes kbSettle { from { transform: scale(1.1) translateY(-1.8%); } to { transform: scale(1.02) translateY(0); } }

/* 底部渐隐，保证浅色照片上的文字也读得清 */
.viewer__scrim {
  position: absolute; inset: auto 0 0 0; z-index: 4;
  height: 42%;
  background: linear-gradient(to top, rgba(8, 10, 8, .72), rgba(8, 10, 8, 0));
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease);
  pointer-events: none;
}
.viewer__stage:hover .viewer__scrim,
.viewer__stage:focus-within .viewer__scrim,
.viewer__stage.is-playing .viewer__scrim { opacity: 1; }

.viewer__info {
  position: absolute; z-index: 5;
  left: clamp(16px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 28px);
  display: flex; flex-direction: column; gap: 3px;
  max-width: min(62%, 560px);
  color: #F4F4EE;
  pointer-events: none;
  text-shadow: 0 1px 12px rgba(0, 0, 0, .6);
}
.viewer__count {
  font-family: var(--font-mono);
  font-size: .7rem; letter-spacing: .12em;
  color: rgba(244, 244, 238, .72);
}
.viewer__title { font-size: 1.1rem; font-weight: 600; letter-spacing: .04em; }
.viewer__place { font-size: .82rem; color: rgba(244, 244, 238, .82); }
.viewer__exif {
  font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .06em;
  color: rgba(244, 244, 238, .66);
}

/* 右上角署名水印 */
.viewer__mark {
  position: absolute; z-index: 5;
  top: var(--space-4); right: var(--space-4);
  font-size: .72rem; font-weight: 500; line-height: 1;
  letter-spacing: .14em; white-space: nowrap;
  color: rgba(255, 255, 255, .8);
  text-shadow: 0 1px 2px rgba(0, 0, 0, .6), 0 1px 10px rgba(0, 0, 0, .5);
  pointer-events: none; user-select: none;
}
.viewer__mark::before {
  content: '';
  position: absolute; z-index: -1;
  inset: -12px -16px -14px -20px;
  background: radial-gradient(115% 150% at 100% 0%,
              rgba(10, 10, 9, .5), rgba(10, 10, 9, .22) 52%, rgba(10, 10, 9, 0) 76%);
}

/* 加载指示：细线流动 */
.viewer__load {
  position: absolute; z-index: 4;
  top: 50%; left: 50%;
  width: 46px; height: 2px;
  margin: -1px 0 0 -23px;
  background: rgba(245, 243, 238, .18);
  overflow: hidden;
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease);
  pointer-events: none;
}
.viewer__load.is-on { opacity: 1; }
.viewer__load i {
  position: absolute; inset: 0 auto 0 0;
  width: 40%;
  background: rgba(245, 243, 238, .8);
  animation: vwLoad 1.1s var(--ease) infinite;
}
@keyframes vwLoad {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(250%); }
}

/* 自动播放进度细线 */
.viewer__progress {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 6;
  height: 2px;
  background: rgba(255, 255, 255, .1);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease);
  pointer-events: none;
}
.viewer__stage.is-playing .viewer__progress { opacity: 1; }
.viewer__progress i {
  display: block; height: 100%; width: 0;
  background: var(--accent);
}

/* 左右翻页箭头 */
.viewer__arrow {
  position: absolute; z-index: 5;
  top: 50%; margin-top: -22px;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 50%;
  color: #F4F4EE;
  background: rgba(12, 12, 10, .42);
  border: 1px solid rgba(245, 243, 238, .16);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease),
              background-color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
}
.viewer__arrow--prev { left: var(--space-4); }
.viewer__arrow--next { right: var(--space-4); }
.viewer__stage:hover .viewer__arrow,
.viewer__stage:focus-within .viewer__arrow,
.viewer__stage.is-fs .viewer__arrow { opacity: 1; }
.viewer__arrow:hover { background: rgba(12, 12, 10, .72); }
.viewer__arrow:active { transform: scale(.94); }

/* 控制条：自动播放 + 全屏 */
.viewer__bar {
  position: absolute; z-index: 6;
  right: var(--space-4); bottom: var(--space-4);
  display: flex; gap: var(--space-2);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease);
}
.viewer__stage:hover .viewer__bar,
.viewer__stage:focus-within .viewer__bar,
.viewer__stage.is-fs .viewer__bar,
.viewer__stage.is-playing .viewer__bar { opacity: 1; }

.viewer__btn {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 50%;
  color: #F4F4EE;
  background: rgba(12, 12, 10, .42);
  border: 1px solid rgba(245, 243, 238, .16);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: background-color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
}
.viewer__btn:hover { background: rgba(12, 12, 10, .72); }
.viewer__btn[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}
.viewer__icon { display: block; }
.viewer__icon--pause,
.viewer__icon--exit { display: none; }
.viewer__btn[aria-pressed="true"] .viewer__icon--play { display: none; }
.viewer__btn[aria-pressed="true"] .viewer__icon--pause { display: block; }
.viewer__stage.is-fs .viewer__icon--enter { display: none; }
.viewer__stage.is-fs .viewer__icon--exit { display: block; }

/* 全屏：优先浏览器全屏 API，不支持时用固定定位兜底 */
.viewer__stage:fullscreen { height: 100vh; border-radius: 0; }
.viewer__stage:fullscreen .viewer__info { left: var(--space-7); bottom: var(--space-7); }
.viewer__stage.is-fs {
  position: fixed; inset: 0; z-index: 150;
  height: 100vh; height: 100dvh;
  border-radius: 0;
}
.viewer__stage.is-fs .viewer__info { left: var(--space-7); bottom: var(--space-7); }

.viewer__hint {
  margin: var(--space-3) 0 0;
  font-family: var(--font-mono);
  font-size: .7rem; letter-spacing: .08em;
  color: var(--ink-3);
}

/* ---------- 缩略图条 ---------- */
.thumbs {
  display: flex;
  gap: 6px;
  margin-top: var(--space-4);
  padding: 2px 2px var(--space-3);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
  scroll-behavior: smooth;
}
.thumbs::-webkit-scrollbar { height: 6px; }
.thumbs::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 999px;
}
.thumb {
  flex: 0 0 auto;
  position: relative;
  width: 104px; height: 70px;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: var(--bg-subtle);
  opacity: .55;
  transition: opacity var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
}
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb:hover { opacity: 1; }
.thumb.is-current { opacity: 1; border-color: var(--accent); }

/* ---------- 拼贴墙（编辑感错落网格） ---------- */
.mosaic-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: var(--space-4); flex-wrap: wrap;
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--line);
}
.mosaic-head__t {
  font-size: 1.06rem; font-weight: 600; letter-spacing: .12em;
}
.mosaic-head__l {
  font-family: var(--font-mono);
  font-size: .66rem; letter-spacing: .22em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.mosaic {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: clamp(96px, 11vw, 150px);
  gap: clamp(10px, 1.4vw, 16px);
  grid-auto-flow: dense;
  margin-top: var(--space-5);
}
.mosaic__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-subtle);
}
.mosaic__item--b { grid-column: span 2; grid-row: span 2; }
.mosaic__item--w { grid-column: span 2; }
.mosaic__item img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(.96);
  transition: transform var(--dur-slow) var(--ease), filter var(--dur-slow) var(--ease);
}
.mosaic__item:hover img,
.mosaic__item:focus-visible img { transform: scale(1.06); filter: saturate(1.1); }
.mosaic__veil {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 14px;
  background: linear-gradient(to top, rgba(10, 14, 11, .58), rgba(10, 14, 11, 0) 60%);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease);
}
.mosaic__item:hover .mosaic__veil,
.mosaic__item:focus-visible .mosaic__veil { opacity: 1; }
.mosaic__t { color: #fff; font-weight: 600; font-size: .94rem; letter-spacing: .06em; }
.mosaic__p {
  color: rgba(255, 255, 255, .75);
  font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .1em;
  margin-top: 2px;
}

/* ==================== 7. 视频板块 ==================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(18px, 3vw, 30px);
}
.video-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--line);
  text-align: left;
  transition: box-shadow var(--dur-mid) var(--ease),
              transform var(--dur-mid) var(--ease);
}
.video-card:hover {
  box-shadow: 0 16px 42px rgba(20, 24, 20, .16);
  transform: translateY(-3px);
}
.video-card__frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.video-card__frame img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}
.video-card:hover .video-card__frame img { transform: scale(1.05); }
.video-card__scrim {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10, 14, 11, .35), rgba(10, 14, 11, 0) 50%);
}
.video-card__duration {
  position: absolute; right: 10px; bottom: 10px;
  font-family: var(--font-mono);
  font-size: .72rem; letter-spacing: .06em;
  color: #fff;
  background: rgba(10, 14, 11, .6);
  padding: 3px 8px; border-radius: 3px;
}
.video-card__play {
  position: absolute; left: 50%; top: 50%;
  translate: -50% -50%;
  width: 58px; height: 58px;
  display: grid; place-items: center;
  color: #fff;
  background: rgba(16, 19, 17, .45);
  border: 1px solid rgba(255, 255, 255, .65);
  border-radius: 50%;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  transition: background var(--dur-fast) var(--ease), scale var(--dur-fast) var(--ease);
}
.video-card:hover .video-card__play {
  background: var(--accent);
  scale: 1.07;
}
.video-card__body { padding: 14px 16px 16px; }
.video-card__title { font-weight: 600; font-size: 1rem; letter-spacing: .04em; }
.video-card__place {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: .74rem; letter-spacing: .1em;
  color: var(--ink-3);
}

/* ---- 通栏精选卡（featured：整行宽幅，标题压封面） ---- */
.video-card--feature { grid-column: 1 / -1; }
.video-card--feature .video-card__frame { aspect-ratio: 21 / 9; }
.video-card--feature .video-card__scrim {
  background: linear-gradient(to top,
              rgba(10, 14, 11, .62) 0%,
              rgba(10, 14, 11, .18) 42%,
              rgba(10, 14, 11, 0) 68%);
}
.video-card--feature .video-card__play { width: 68px; height: 68px; }
.video-card__overlay {
  position: absolute; left: 0; right: 0; bottom: 0;
  z-index: 2;
  padding: clamp(14px, 2.4vw, 24px) clamp(16px, 2.6vw, 28px);
  display: flex; flex-direction: column; align-items: flex-start;
  text-align: left;
  pointer-events: none;
}
.video-card__overlay .video-card__title {
  color: #fff;
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  letter-spacing: .06em;
  text-shadow: 0 2px 14px rgba(10, 14, 11, .45);
}
.video-card__overlay .video-card__place {
  margin-top: 6px;
  color: rgba(255, 255, 255, .82);
  font-size: .78rem;
  text-shadow: 0 1px 8px rgba(10, 14, 11, .45);
}
.video-card__badge {
  font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .22em;
  color: #fff;
  background: var(--accent);
  padding: 3px 10px; border-radius: 3px;
  margin-bottom: 10px;
}
@media (max-width: 1024px) {
  .video-card--feature .video-card__frame { aspect-ratio: 16 / 7; }
}
@media (max-width: 640px) {
  .video-card--feature .video-card__frame { aspect-ratio: 16 / 9; }
}

/* ---- 占位卡（content.js 里 src 为空即渲染）：虚线空位，等下一次上新 ---- */
.video-card--placeholder { cursor: default; }
.video-card--placeholder:hover {
  box-shadow: none;
  transform: none;
}
.video-card--placeholder__frame {
  display: grid;
  place-items: center;
  background:
    repeating-linear-gradient(45deg,
      transparent 0 12px,
      var(--accent-soft) 12px 24px),
    var(--bg-subtle);
  border: 1.5px dashed var(--line-strong);
  border-radius: var(--radius) var(--radius) 0 0;
}
.video-card--placeholder .video-card__play {
  color: var(--ink-3);
  background: transparent;
  border-color: var(--line-strong);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
.video-card--placeholder__mark {
  position: absolute; top: 12px; left: 14px;
  font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .28em;
  color: var(--ink-3);
  text-transform: uppercase;
}

/* ==================== 8. 关于 & 联系 ==================== */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(32px, 6vw, 72px);
  align-items: start;
}
.about-text p + p { margin-top: var(--space-4); }
.about-text { color: var(--ink-2); font-size: 1.02rem; }
.about-text strong { color: var(--ink); }

.fact-table { border-top: 1px solid var(--line-strong); }
.fact-table__row {
  display: grid; grid-template-columns: 120px 1fr;
  gap: var(--space-4);
  padding-block: 14px;
  border-bottom: 1px solid var(--line);
  font-size: .94rem;
}
.fact-table__k { color: var(--ink-3); letter-spacing: .12em; }
.fact-table__v { color: var(--ink); }

.contact-wrap { text-align: center; }
.contact-title {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  letter-spacing: .18em; font-weight: 700;
}
.contact-sub { margin-top: var(--space-4); color: var(--ink-2); }
.contact-links {
  display: flex; justify-content: center; flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-7);
}
.contact-link {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 28px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: .95rem; letter-spacing: .1em;
  transition: all var(--dur-fast) var(--ease);
}
.contact-link:hover {
  background: var(--accent); border-color: var(--accent);
  color: var(--on-accent);
}

/* ==================== 9. 页脚 ==================== */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--space-6);
}
.site-footer__inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: var(--space-4); flex-wrap: wrap;
  color: var(--ink-3); font-size: .84rem; letter-spacing: .05em;
}
.site-footer__top {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--ink-2);
  transition: color var(--dur-fast) var(--ease);
}
.site-footer__top:hover { color: var(--accent); }

/* ==================== 10. 灯箱 ==================== */
.lightbox {
  position: fixed; inset: 0; z-index: 300;
  display: none;
  background: rgba(8, 10, 8, .94);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.lightbox.is-open { display: block; }

.lightbox__stage {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  padding: clamp(12px, 4vh, 48px);
  padding-bottom: 96px;
}
.lightbox__img {
  max-width: 100%; max-height: 100%;
  width: auto; height: auto;
  object-fit: contain;
  border-radius: 2px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .5);
}
.lightbox__video {
  width: min(100%, 1280px);
  max-height: 100%;
  background: #000;
  border-radius: 2px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .5);
}

.lightbox__bar {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; align-items: baseline; justify-content: center;
  gap: var(--space-4); flex-wrap: wrap;
  padding: 18px clamp(16px, 4vw, 48px) 26px;
  color: rgba(255, 255, 255, .92);
  background: linear-gradient(to top, rgba(8, 10, 8, .75), rgba(8, 10, 8, 0));
}
.lightbox__title { font-weight: 600; letter-spacing: .08em; }
.lightbox__meta {
  font-family: var(--font-mono);
  font-size: .76rem; letter-spacing: .1em;
  color: rgba(255, 255, 255, .62);
}
.lightbox__count {
  position: absolute; top: 20px; left: 50%; translate: -50% 0;
  font-family: var(--font-mono);
  font-size: .76rem; letter-spacing: .2em;
  color: rgba(255, 255, 255, .6);
}

.lightbox__close,
.lightbox__nav {
  position: absolute; z-index: 2;
  display: grid; place-items: center;
  width: 46px; height: 46px;
  border-radius: 50%;
  color: rgba(255, 255, 255, .85);
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .22);
  transition: all var(--dur-fast) var(--ease);
}
.lightbox__close:hover,
.lightbox__nav:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.lightbox__close { top: 18px; right: 18px; }
.lightbox__nav--prev { left: 18px; top: 50%; translate: 0 -50%; }
.lightbox__nav--next { right: 18px; top: 50%; translate: 0 -50%; }
.lightbox__nav.is-hidden { display: none; }

/* ==================== 11. 动效 ==================== */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--dur-slow) var(--ease),
              transform var(--dur-slow) var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll-line { animation: none; }
  .hero__media img { transform: none; }
  * { transition-duration: 1ms !important; animation-duration: 1ms !important; }
}

/* ==================== 12. 响应式 ==================== */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .mosaic { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 760px) {
  .viewer__stage { height: clamp(260px, 56vh, 460px); }
  .viewer__info { left: var(--space-4); bottom: var(--space-4); max-width: 78%; }
  .viewer__title { font-size: .94rem; }
  .viewer__arrow { width: 38px; height: 38px; margin-top: -19px; opacity: 1; }
  .viewer__arrow--prev { left: var(--space-2); }
  .viewer__arrow--next { right: var(--space-2); }
  .viewer__bar { right: var(--space-3); bottom: var(--space-3); opacity: 1; }
  .viewer__btn { width: 36px; height: 36px; }
  .viewer__mark { top: var(--space-3); right: var(--space-3); font-size: .66rem; letter-spacing: .1em; }
  .thumb { width: 82px; height: 56px; }
  .viewer__hint { display: none; }
  .frame { width: 150px; }
}

@media (max-width: 640px) {
  .nav { display: none; }
  .stats__grid { padding-block: var(--space-6); }
  .video-grid { grid-template-columns: 1fr; }
  .section-head { grid-template-columns: 1fr; align-items: start; }
  .fact-table__row { grid-template-columns: 96px 1fr; }
  .lightbox__stage { padding-bottom: 120px; }
  .lightbox__nav--prev { left: 10px; }
  .lightbox__nav--next { right: 10px; }
  .mosaic { grid-template-columns: repeat(2, 1fr); grid-auto-rows: clamp(90px, 22vw, 130px); }
  .mosaic__item--b { grid-column: span 2; }
  .mosaic__veil { padding: 10px; }
  .mosaic__t { font-size: .82rem; }
}

@media (prefers-reduced-motion: reduce) {
  .filmstrip__track { animation: none; }
  .viewer__img { animation: none !important; }
}