/* ============================================================
   SKYFILE — dark cosmic archive
   tokens → background → header → hero → spotlight → archive → modal
   ============================================================ */

:root{
  --bg:        #05070c;
  --bg-soft:   #080c14;
  --panel:     #0b1019;
  --line:      rgba(126,168,255,.14);
  --line-str:  rgba(126,168,255,.28);
  --ink:       #eaf0ff;
  --ink-2:     #9aa9c6;
  --ink-3:     #66748f;
  --signal:    #7cf5c4;
  --beam:      #7c9dff;
  --violet:    #a97bff;
  --radius:    18px;

  --display: "Chakra Petch", "Noto Sans SC", "Noto Sans JP", "Noto Kufi Arabic", system-ui, sans-serif;
  --sans:    "Sora", "Noto Sans SC", "Noto Sans JP", "Noto Kufi Arabic", system-ui, sans-serif;

  --ease: cubic-bezier(.22,.75,.28,1);
  --gutter: clamp(20px, 4vw, 40px);
  --max: 1200px;
}

*,*::before,*::after{ box-sizing: border-box; }
[hidden]{ display: none !important; }

html{
  color-scheme: dark;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body{
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--bg);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.is-locked{ overflow: hidden; }

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
button{ font: inherit; color: inherit; }

/* 氛围层：固定定位而不是 background-attachment:fixed —— 后者在移动端与滚动时重绘开销很大 */
body::before{
  content: "";
  position: fixed; inset: 0; z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1200px 700px at 50% -12%, rgba(90,140,255,.22), transparent 62%),
    radial-gradient(900px 620px at 88% 6%,  rgba(124,245,196,.10), transparent 66%),
    radial-gradient(760px 560px at 6% 44%,  rgba(169,123,255,.10), transparent 70%),
    linear-gradient(180deg, #05070c 0%, #060a12 45%, #04060a 100%);
}

/* fine grid overlay */
body::after{
  content: "";
  position: fixed; inset: 0; z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(126,168,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126,168,255,.055) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 68%);
          mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 68%);
}

#stars{
  position: fixed; inset: 0; z-index: 0;
  width: 100%; height: 100%;
  pointer-events: none; opacity: .85;
}

.grain{
  position: fixed; inset: 0; z-index: 5;
  pointer-events: none; opacity: .045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap{
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

:where(a,button,[tabindex]):focus-visible{
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ============================ header ============================ */

.head{
  position: sticky; top: 0; z-index: 70;
  background: linear-gradient(180deg, rgba(5,7,12,.88), rgba(5,7,12,.62));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
          backdrop-filter: blur(18px) saturate(140%);
}

.head-inner{
  display: flex; align-items: center; gap: 24px;
  min-height: 72px;
}

.brand{
  display: inline-flex; align-items: center; gap: 12px;
  margin-inline-end: auto;
  padding-block: 10px;
}

.brand-mark{
  width: 16px; height: 16px; flex: none;
  border: 1.5px solid var(--signal);
  transform: rotate(45deg);
  box-shadow: 0 0 18px rgba(124,245,196,.55), inset 0 0 8px rgba(124,245,196,.35);
  animation: mark 5s var(--ease) infinite;
}
.brand-mark.sm{ width: 11px; height: 11px; }
@keyframes mark{
  0%,100%{ transform: rotate(45deg) scale(1); opacity: .95; }
  50%    { transform: rotate(45deg) scale(.72); opacity: .55; }
}

.brand-text{ display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong{
  font-family: var(--display); font-weight: 700;
  font-size: 17px; letter-spacing: .22em; text-transform: uppercase;
}
.brand-text small{
  font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-3); margin-top: 3px;
}

.nav{ display: flex; gap: 6px; }
.nav a{
  position: relative;
  display: inline-flex; align-items: center; min-height: 44px;
  padding: 10px 14px;
  font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-2);
  transition: color .25s var(--ease);
}
.nav a::after{
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 6px;
  height: 1px; background: var(--signal);
  transform: scaleX(0); transform-origin: inline-start;
  transition: transform .3s var(--ease);
}
.nav a:hover{ color: var(--ink); }
.nav a:hover::after{ transform: scaleX(1); }

/* language switcher */
.lang{ position: relative; }

.lang-btn{
  display: inline-flex; align-items: center; gap: 8px;
  height: 44px; padding-inline: 14px;
  background: rgba(255,255,255,.035);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: .14em;
  color: var(--ink);
  cursor: pointer;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.lang-btn:hover{ border-color: var(--line-str); background: rgba(255,255,255,.06); }
.lang-btn .chev{ opacity: .6; transition: transform .25s var(--ease); }
.lang-btn[aria-expanded="true"] .chev{ transform: rotate(180deg); }

.lang-list{
  position: absolute; inset-inline-end: 0; top: calc(100% + 10px);
  min-width: 210px;
  margin: 0; padding: 6px; list-style: none;
  background: rgba(9,13,21,.97);
  border: 1px solid var(--line-str);
  border-radius: 14px;
  box-shadow: 0 30px 70px -30px #000, 0 0 0 1px rgba(0,0,0,.4);
  -webkit-backdrop-filter: blur(14px);
          backdrop-filter: blur(14px);
  z-index: 80;
  transform-origin: top;
  animation: pop .18s var(--ease);
}
@keyframes pop{ from{ opacity: 0; transform: translateY(-6px) scale(.98); } }

.lang-item{
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  width: 100%; min-height: 44px; padding-inline: 12px;
  background: none; border: 0; border-radius: 9px;
  font-size: 14px; text-align: start; cursor: pointer;
  color: var(--ink-2);
  transition: background .18s, color .18s;
}
.lang-item:hover{ background: rgba(124,245,196,.08); color: var(--ink); }
.lang-item .short{
  font-family: var(--display); font-size: 11px; letter-spacing: .1em;
  color: var(--ink-3);
}
.lang-item[aria-selected="true"]{ color: var(--signal); }
.lang-item[aria-selected="true"] .short{ color: var(--signal); }

/* ============================ hero ============================ */

.hero{
  position: relative;
  display: flex; align-items: center;
  min-height: min(86svh, 820px);
  padding-block: clamp(80px, 10vw, 130px) clamp(60px, 7vw, 100px);
  overflow: hidden;
  z-index: 2;
}

.hero-inner{ position: relative; z-index: 3; }

.radar{
  position: absolute;
  top: 46%; left: 50%;
  width: min(880px, 118vw); aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: repeating-radial-gradient(circle at 50% 50%,
      rgba(124,245,196,.10) 0 1px, transparent 1px 108px);
  -webkit-mask-image: radial-gradient(circle, #000 26%, transparent 70%);
          mask-image: radial-gradient(circle, #000 26%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}
.radar::after{
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0 68%, rgba(124,245,196,.05) 82%, rgba(124,245,196,.22) 96%, transparent 100%);
  -webkit-mask-image: radial-gradient(circle, #000 14%, transparent 68%);
          mask-image: radial-gradient(circle, #000 14%, transparent 68%);
  animation: sweep 11s linear infinite;
}
@keyframes sweep{ to{ transform: rotate(360deg); } }

.hero-fade{
  position: absolute; inset-inline: 0; bottom: 0; height: 160px;
  background: linear-gradient(180deg, transparent, rgba(5,7,12,.85));
  pointer-events: none; z-index: 2;
}

.eyebrow{
  display: inline-flex; align-items: center; gap: 10px;
  margin: 0 0 22px;
  font-size: 11px; letter-spacing: .32em; text-transform: uppercase;
  color: var(--signal);
}
.eyebrow .dot{
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 12px var(--signal);
  animation: blink 2.6s ease-in-out infinite;
}
@keyframes blink{ 0%,100%{ opacity: 1; } 50%{ opacity: .25; } }

.hero-title{
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.9rem, 8.2vw, 6.9rem);
  line-height: .92;
  letter-spacing: -.02em;
  text-transform: uppercase;
}
.hero-title .line{ display: block; }
.hero-title .accent{
  color: var(--signal);
  text-shadow: 0 0 60px rgba(124,245,196,.45), 0 0 4px rgba(124,245,196,.4);
}

.lede{
  max-width: 58ch;
  margin: 26px 0 0;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.75;
  color: var(--ink-2);
}

.actions{
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-top: 34px;
}

.btn{
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding-inline: 26px;
  border: 1px solid transparent; border-radius: 999px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease),
              background .25s var(--ease), border-color .25s var(--ease), color .2s;
}
.btn:active{ transform: translateY(1px); }

.btn-primary{
  background: linear-gradient(135deg, #96ffd8 0%, #57e2f0 45%, #8ba8ff 100%);
  color: #04121a;
  box-shadow: 0 14px 44px -16px rgba(124,245,196,.85);
}
.btn-primary:hover{
  transform: translateY(-2px);
  box-shadow: 0 22px 56px -18px rgba(124,245,196,1);
}

.btn-ghost{
  background: rgba(255,255,255,.035);
  border-color: var(--line-str);
  color: var(--ink);
  -webkit-backdrop-filter: blur(8px);
          backdrop-filter: blur(8px);
}
.btn-ghost:hover{
  transform: translateY(-2px);
  background: rgba(255,255,255,.07);
  border-color: rgba(124,245,196,.5);
}

.stats{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, auto));
  justify-content: start;
  gap: clamp(24px, 5vw, 64px);
  margin: clamp(44px, 6vw, 68px) 0 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.stats dt{
  font-size: 10.5px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--ink-3);
}
.stats dd{
  margin: 8px 0 0;
  font-family: var(--display); font-weight: 600;
  font-size: 26px; line-height: 1;
  letter-spacing: .04em;
}
.dd-live{
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 15px !important; letter-spacing: .24em;
  color: var(--signal);
}
.pulse{
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--signal);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse{
  0%  { box-shadow: 0 0 0 0 rgba(124,245,196,.55); }
  70% { box-shadow: 0 0 0 12px rgba(124,245,196,0); }
  100%{ box-shadow: 0 0 0 0 rgba(124,245,196,0); }
}

/* ============================ spotlight ============================ */

.spotlight-sec{ position: relative; z-index: 2; padding-block: clamp(10px, 3vw, 24px) clamp(56px, 8vw, 96px); }

.spotlight{
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  width: 100%;
  padding: 0;
  text-align: start;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(140deg, rgba(19,27,42,.9), rgba(7,10,17,.92));
  overflow: hidden;
  cursor: pointer;
  transition: border-color .4s var(--ease), transform .4s var(--ease), box-shadow .4s var(--ease);
}
.spotlight:hover{
  border-color: rgba(124,245,196,.35);
  transform: translateY(-3px);
  box-shadow: 0 40px 90px -50px rgba(124,245,196,.75);
}

.spotlight .thumb{ border-radius: 0; }

.spot-info{
  display: flex; flex-direction: column; justify-content: center; gap: 14px;
  padding: clamp(24px, 3.4vw, 46px);
}
.spot-label{
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 10.5px; letter-spacing: .28em; text-transform: uppercase;
  color: var(--signal);
}
.spot-label::before{
  content: ""; width: 16px; height: 1px; background: var(--signal);
}
.spot-title{
  margin: 0;
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.35rem, 2.6vw, 2.1rem);
  line-height: 1.15; letter-spacing: -.01em;
  text-wrap: balance;
}
.spot-text{
  margin: 0;
  font-size: 16px; line-height: 1.7; color: var(--ink-2);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden;
}
.spot-cta{
  display: inline-flex; align-items: center; gap: 9px; margin-top: 6px;
  font-size: 12px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink);
}
.spot-cta svg{ transition: transform .3s var(--ease); }
.spotlight:hover .spot-cta svg{ transform: translateX(4px); }

/* ============================ archive ============================ */

.archive-sec{ position: relative; z-index: 2; padding-block: clamp(20px, 4vw, 40px) clamp(72px, 9vw, 120px); }

.sec-head{
  display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between;
  gap: 14px 32px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 26px;
}
.sec-head h2{
  margin: 0;
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1; letter-spacing: -.01em; text-transform: uppercase;
}
.sec-head p{
  margin: 0; max-width: 46ch;
  font-size: 15px; color: var(--ink-3);
}

.filters{
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 28px;
}
.chip{
  min-height: 44px; padding-inline: 18px;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-2);
  cursor: pointer;
  transition: all .22s var(--ease);
}
.chip:hover{ color: var(--ink); border-color: var(--line-str); }
.chip.is-on{
  background: rgba(124,245,196,.14);
  border-color: rgba(124,245,196,.55);
  color: var(--signal);
}

.grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.file{
  display: flex; flex-direction: column;
  width: 100%; padding: 0; text-align: start;
  background: linear-gradient(180deg, rgba(15,21,32,.92), rgba(7,10,17,.94));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.file:hover,
.file:focus-visible{
  transform: translateY(-4px);
  border-color: rgba(124,245,196,.42);
  box-shadow: 0 30px 70px -40px rgba(124,245,196,.8);
}

/* thumbnail */
.thumb{
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, rgba(124,245,196,.10), transparent 60%),
    linear-gradient(160deg, #0d1420, #060910);
}
.thumb img{
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(.85) contrast(1.08) brightness(.66) saturate(.9);
  transform: scale(1.02);
  transition: filter .6s var(--ease), transform .8s var(--ease);
}
.file:hover .thumb img,
.file:focus-visible .thumb img,
.spotlight:hover .thumb img,
.spotlight:focus-visible .thumb img{
  filter: grayscale(0) contrast(1.05) brightness(.95) saturate(1.05);
  transform: scale(1.07);
}

.thumb .scan{
  position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(180deg,
      rgba(5,7,12,.30) 0 1px, transparent 1px 3px);
  opacity: .55;
  transition: opacity .5s var(--ease);
}
.file:hover .thumb .scan{ opacity: .18; }

.thumb::after{
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 45%, rgba(4,6,10,.78) 100%);
}

.thumb-fallback{
  position: absolute; inset: 0;
  display: none; place-items: center;
  font-family: var(--display); font-size: 12px; letter-spacing: .38em;
  color: rgba(124,245,196,.55);
  background:
    repeating-linear-gradient(45deg, rgba(124,245,196,.05) 0 1px, transparent 1px 14px),
    linear-gradient(160deg, #0b111b, #05080e);
}
.thumb.noimg img{ opacity: 0; }
.thumb.noimg .thumb-fallback{ display: grid; }
.thumb.noimg::before{
  content: ""; position: absolute; inset-inline: 12%; top: 50%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(124,245,196,.45), transparent);
}

.play-badge{
  position: absolute; left: 50%; top: 50%;
  width: 54px; height: 54px; margin: -27px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(124,245,196,.7);
  background: rgba(6,10,16,.55);
  -webkit-backdrop-filter: blur(6px);
          backdrop-filter: blur(6px);
  color: var(--signal);
  opacity: 0;
  transform: scale(.85);
  transition: opacity .35s var(--ease), transform .35s var(--ease);
  z-index: 2;
}
.file:hover .play-badge,
.file:focus-visible .play-badge,
.spotlight:hover .play-badge,
.spotlight:focus-visible .play-badge{
  opacity: 1; transform: scale(1);
}
@media (hover: none){
  .play-badge{ opacity: .85; transform: scale(1); }
}

.thumb-tag{
  position: absolute; top: 12px; inset-inline-start: 12px;
  padding: 5px 10px;
  font-size: 9.5px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--signal);
  background: rgba(5,10,16,.72);
  border: 1px solid rgba(124,245,196,.3);
  border-radius: 4px;
  z-index: 2;
}
.thumb-tag.plain{ color: var(--ink-2); border-color: var(--line-str); }

/* card body */
.file-body{
  display: flex; flex-direction: column; gap: 9px;
  padding: 18px 20px 22px;
}
.file-kicker{
  font-size: 10px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--ink-3);
}
.file-title{
  font-family: var(--display); font-weight: 600;
  font-size: 17.5px; line-height: 1.3; letter-spacing: -.005em;
  color: var(--ink);
  text-wrap: balance;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.file-text{
  font-size: 16px; line-height: 1.62; color: var(--ink-2);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================ states ============================ */

.state{
  display: grid; justify-items: center; gap: 10px;
  padding: clamp(48px, 8vw, 90px) 20px;
  text-align: center;
  border: 1px dashed var(--line-str);
  border-radius: 20px;
  background: rgba(255,255,255,.015);
}
.state-mark{
  width: 34px; height: 34px; margin-bottom: 6px;
  border: 1px solid rgba(124,245,196,.45);
  transform: rotate(45deg);
  animation: mark 4s var(--ease) infinite;
}
.state h3{
  margin: 0; font-family: var(--display); font-size: 19px; letter-spacing: .06em;
  text-transform: uppercase;
}
.state p{ margin: 0; max-width: 44ch; font-size: 15px; color: var(--ink-3); }
.state .btn{ margin-top: 14px; }

/* skeleton */
.sk{
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; background: rgba(255,255,255,.02);
}
.sk-thumb{ aspect-ratio: 16/9; }
.sk-line{ height: 12px; margin: 14px 20px; border-radius: 6px; }
.sk-line.w60{ width: 60%; margin-bottom: 22px; }
.sk-thumb,.sk-line{
  background: linear-gradient(100deg, rgba(255,255,255,.03) 25%, rgba(124,245,196,.09) 45%, rgba(255,255,255,.03) 65%);
  background-size: 220% 100%;
  animation: shimmer 1.6s linear infinite;
}
@keyframes shimmer{ from{ background-position: 180% 0; } to{ background-position: -60% 0; } }

/* ============================ footer ============================ */

.foot{
  position: relative; z-index: 2;
  border-top: 1px solid var(--line);
  padding-block: clamp(40px, 6vw, 64px);
  background: linear-gradient(180deg, transparent, rgba(4,6,10,.7));
}
.foot-inner{
  display: flex; flex-wrap: wrap; gap: 20px 48px;
  align-items: flex-start; justify-content: space-between;
}
.foot-brand{
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--display); font-size: 15px; letter-spacing: .22em; text-transform: uppercase;
}
.foot-copy{ max-width: 56ch; }
.foot-copy p{ margin: 0 0 6px; font-size: 13.5px; color: var(--ink-2); }
.foot-copy .dim{ color: var(--ink-3); }

/* preview bar */
.preview-bar{
  position: fixed; inset-inline: 12px; bottom: 12px; z-index: 90;
  display: flex; align-items: center; gap: 14px;
  padding: 12px 14px 12px 18px;
  font-size: 12.5px; color: #ffd9a3;
  background: rgba(28,20,8,.94);
  border: 1px solid rgba(255,180,87,.4);
  border-radius: 12px;
  box-shadow: 0 20px 50px -24px #000;
}
.preview-bar span{ flex: 1; }
.preview-bar button{
  min-width: 32px; min-height: 32px;
  background: none; border: 0; border-radius: 6px;
  font-size: 20px; line-height: 1; color: #ffd9a3; cursor: pointer;
}

/* ============================ modal ============================ */

.modal{
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  padding: clamp(12px, 3vw, 32px);
}
.modal-backdrop{
  position: absolute; inset: 0;
  background: rgba(3,5,9,.86);
  -webkit-backdrop-filter: blur(10px);
          backdrop-filter: blur(10px);
  animation: fade .25s var(--ease);
}
@keyframes fade{ from{ opacity: 0; } }

.modal-panel{
  position: relative;
  width: min(1080px, 100%);
  max-height: 92svh;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: #080c14;
  border: 1px solid var(--line-str);
  border-radius: 20px;
  box-shadow: 0 60px 120px -40px #000;
  animation: pop .3s var(--ease);
}

.modal-close{
  position: absolute; top: 12px; inset-inline-end: 12px; z-index: 3;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  background: rgba(5,8,13,.72);
  border: 1px solid var(--line-str);
  border-radius: 50%;
  color: var(--ink-2);
  cursor: pointer;
  -webkit-backdrop-filter: blur(8px);
          backdrop-filter: blur(8px);
  transition: color .2s, border-color .2s, transform .2s;
}
.modal-close:hover{ color: var(--signal); border-color: rgba(124,245,196,.6); transform: rotate(90deg); }

.modal-video{
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
}
.modal-video iframe,
.modal-video video{
  position: absolute; inset: 0;
  width: 100%; height: 100%; border: 0;
}

/* 无法内嵌播放时的占位面板 */
.modal-fallback{
  position: absolute; inset: 0;
  display: grid; place-items: center; align-content: center; gap: 16px;
  padding: 28px; text-align: center;
  background:
    repeating-linear-gradient(45deg, rgba(124,245,196,.045) 0 1px, transparent 1px 18px),
    radial-gradient(circle at 50% 30%, rgba(124,245,196,.10), transparent 62%),
    linear-gradient(160deg, #0a1018, #05080e);
}
.mf-mark{
  width: 30px; height: 30px;
  border: 1px solid rgba(124,245,196,.5);
  transform: rotate(45deg);
  box-shadow: 0 0 26px rgba(124,245,196,.35);
  animation: mark 4s var(--ease) infinite;
}
.mf-text{ margin: 0; max-width: 40ch; font-size: 15px; line-height: 1.6; color: var(--ink-2); }
.modal-fallback .btn{ text-decoration: none; }

/* HLS 起播前的加载态 */
.modal-loading{
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  background: #05080e;
  font-size: 13px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3);
  pointer-events: none;
}
.spin{
  width: 26px; height: 26px; border-radius: 50%;
  border: 1.5px solid rgba(124,245,196,.22);
  border-top-color: var(--signal);
  animation: spin .9s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }

.modal-body{ padding: clamp(20px, 3vw, 34px); }.modal-kicker{
  margin: 0 0 10px;
  font-size: 10px; letter-spacing: .26em; text-transform: uppercase;
  color: var(--signal);
}
.modal-body h2{
  margin: 0 0 14px;
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  line-height: 1.2;
}
.modal-text{
  margin: 0 0 24px;
  font-size: 17px; line-height: 1.75; color: var(--ink-2);
  white-space: pre-line;
}
.modal-src{
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding-inline: 18px;
  border: 1px solid var(--line-str); border-radius: 999px;
  font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink);
  transition: border-color .25s, color .25s, background .25s;
}
.modal-src:hover{ border-color: rgba(124,245,196,.6); color: var(--signal); background: rgba(124,245,196,.06); }

/* ============================ reveal ============================ */

.file,.spotlight,.sec-head{
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity .7s var(--ease) calc(var(--i, 0) * 55ms),
    transform .7s var(--ease) calc(var(--i, 0) * 55ms),
    border-color .4s var(--ease),
    box-shadow .4s var(--ease);
}
.sec-head{ transform: translateY(12px); }
.file.in,.spotlight.in,.sec-head.in{ opacity: 1; transform: none; }

/* hover 必须排在入场规则之后，否则会被 .in 覆盖 */
.file.in:hover,.file.in:focus-visible{
  transform: translateY(-4px);
  border-color: rgba(124,245,196,.42);
  box-shadow: 0 30px 70px -40px rgba(124,245,196,.8);
}
.spotlight.in:hover,.spotlight.in:focus-visible{
  transform: translateY(-3px);
  border-color: rgba(124,245,196,.35);
  box-shadow: 0 40px 90px -50px rgba(124,245,196,.75);
}

/* ============================ responsive ============================ */

@media (max-width: 900px){
  .spotlight{ grid-template-columns: 1fr; }
  .spot-info{ padding: 22px; }
  .spot-title{ font-size: 1.4rem; }
}

@media (max-width: 720px){
  .nav{ display: none; }
  .brand-text small{ display: none; }
  .head-inner{ min-height: 64px; gap: 12px; }
  .grid{ grid-template-columns: 1fr; gap: 16px; }
  .hero{ min-height: auto; padding-block: 72px 64px; }
  .hero-title{ font-size: clamp(2.5rem, 12vw, 4rem); }
  .stats{ grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .stats dd{ font-size: 20px; }
  .stats dt{ font-size: 9.5px; letter-spacing: .14em; }
  .actions .btn{ flex: 1 1 auto; }
  .filters{
    flex-wrap: nowrap; overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }
  .filters::-webkit-scrollbar{ display: none; }
  .chip{ flex: 0 0 auto; }
  .modal{ padding: 0; }
  .modal-panel{
    width: 100%; max-height: 100svh; height: 100%;
    border-radius: 0; border: 0;
  }
  .modal-body{ padding: 18px 20px 40px; }
}

@media (max-width: 420px){
  .hero-title{ font-size: clamp(2.1rem, 13vw, 3rem); }
  .lang-btn{ padding-inline: 10px; }
}

/* RTL: Arabic ligatures break under letter-spacing */
[dir="rtl"] .hero-title,
[dir="rtl"] .sec-head h2,
[dir="rtl"] .brand-text strong,
[dir="rtl"] .spot-title,
[dir="rtl"] .file-title,
[dir="rtl"] .modal-body h2,
[dir="rtl"] .eyebrow,
[dir="rtl"] .btn,
[dir="rtl"] .file-kicker,
[dir="rtl"] .thumb-tag{
  letter-spacing: 0;
  text-transform: none;
}
[dir="rtl"] .brand-text strong,
[dir="rtl"] .sec-head h2,
[dir="rtl"] .spot-label,
[dir="rtl"] .hero-title{ text-transform: none; }
[dir="rtl"] .eyebrow .dot{ order: 0; }

/* ============================ motion ============================ */

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *,*::before,*::after{
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .file,.spotlight,.sec-head{ opacity: 1; transform: none; }
  .radar::after{ display: none; }
}