*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #050508;
  --fg: #e8e6e3;
  --muted: rgba(232, 230, 227, 0.35);
  --hint: rgba(232, 230, 227, 0.12);
  --accent: #c9a962;
  --hex-line: rgba(201, 169, 98, 0.15);
}

html,
body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--fg);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ── Video background ── */
.video-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.video-layer video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.8s ease;
  filter: brightness(0.62) saturate(1.05) contrast(1.05);
}

.video-layer video.active {
  opacity: 1;
}

/* 第三个视频（雾）：偏上取景 + 播放时缓慢缩小以露出画面上部 */
.video-layer video.video-focus-top {
  object-position: 50% 12%;
  transform-origin: 50% 0%;
}

.video-layer video.video-focus-top.active {
  animation: video-reveal-top var(--video-dur, 18s) ease-out forwards;
}

@keyframes video-reveal-top {
  from {
    transform: scale(1.32);
  }
  to {
    transform: scale(1.06);
  }
}

.video-layer::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      ellipse 75% 65% at 50% 45%,
      transparent 0%,
      rgba(5, 5, 8, 0.28) 55%,
      rgba(5, 5, 8, 0.72) 100%
    ),
    linear-gradient(180deg, rgba(5, 5, 8, 0.12) 0%, rgba(5, 5, 8, 0.5) 100%);
  pointer-events: none;
}

/* ── Grain ── */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 1;
  opacity: 0.04;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 8s steps(10) infinite;
}

@keyframes grain {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-2%, -2%);
  }
}

/* ── Main layout ── */
.stage {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem 1.5rem 3rem;
}

/* ── Brand ── */
.brand {
  text-align: center;
  margin-bottom: 2.5rem;
}

.brand h1 {
  font-size: clamp(2.4rem, 8vw, 4.2rem);
  font-weight: 200;
  letter-spacing: 0.55em;
  text-indent: 0.55em;
  color: var(--fg);
  text-shadow: 0 0 40px rgba(201, 169, 98, 0.12);
}

.brand h1 .six {
  color: var(--accent);
  font-weight: 300;
}

.brand .tag {
  margin-top: 1rem;
  font-size: 0.65rem;
  letter-spacing: 0.45em;
  text-indent: 0.45em;
  color: var(--muted);
  text-transform: uppercase;
}

.brand .whisper {
  margin-top: 0.75rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--hint);
  min-height: 1.2em;
  transition: opacity 0.6s;
}

/* ── Hex ring ── */
.hex-ring {
  position: relative;
  width: min(92vw, 680px);
  aspect-ratio: 1.15;
  display: grid;
  place-items: center;
}

.hex-ring::before {
  content: "";
  position: absolute;
  width: 72%;
  aspect-ratio: 1;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  border: 1px solid var(--hex-line);
  background: transparent;
  pointer-events: none;
}

.hex-ring::after {
  content: "";
  position: absolute;
  width: 88%;
  aspect-ratio: 1;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  border: 1px solid rgba(201, 169, 98, 0.06);
  pointer-events: none;
}

/* ── Character nodes ── */
.member {
  position: absolute;
  width: clamp(88px, 22vw, 128px);
  cursor: default;
  transform: translate(-50%, -50%);
  transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.member:hover {
  transform: translate(-50%, -50%) scale(1.06);
  z-index: 10;
}

.member-frame {
  position: relative;
  aspect-ratio: 3 / 4;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.6);
  border: none;
}

.member-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    180deg,
    rgba(5, 5, 8, 0.05) 0%,
    rgba(5, 5, 8, 0.45) 100%
  );
  transition: opacity 0.5s;
}

.member:hover .member-frame::before {
  opacity: 0.35;
}

.member-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  filter: grayscale(0.45) brightness(0.62) contrast(1.05);
  transition: filter 0.6s ease, transform 0.8s ease;
}

.member:hover .member-frame img {
  filter: grayscale(0.05) brightness(0.88) contrast(1.05);
  transform: scale(1.08);
}

.member-index {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.82);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.8);
}

.member:hover .member-index {
  color: var(--accent);
}

.member-hint {
  display: none;
}

.member-glitch {
  position: absolute;
  inset: 0;
  z-index: 4;
  opacity: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(255, 255, 255, 0.03) 2px,
    rgba(255, 255, 255, 0.03) 4px
  );
  pointer-events: none;
}

.member:hover .member-glitch {
  animation: glitch-flash 0.4s ease;
}

@keyframes glitch-flash {
  0%,
  100% {
    opacity: 0;
  }
  30%,
  70% {
    opacity: 1;
  }
}

/* Hex positions (6 vertices of outer ring) */
.member[data-i="0"] {
  top: 8%;
  left: 50%;
}
.member[data-i="1"] {
  top: 28%;
  left: 82%;
}
.member[data-i="2"] {
  top: 72%;
  left: 82%;
}
.member[data-i="3"] {
  top: 92%;
  left: 50%;
}
.member[data-i="4"] {
  top: 72%;
  left: 18%;
}
.member[data-i="5"] {
  top: 28%;
  left: 18%;
}

/* ── Footer clues ── */
.footer-clues {
  position: fixed;
  bottom: 1.25rem;
  left: 0;
  right: 0;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  padding: 0 1.5rem;
  pointer-events: none;
}

.footer-clues span {
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  color: var(--hint);
  font-family: "Cascadia Code", ui-monospace, monospace;
}

.footer-clues .blink {
  animation: blink 4s ease-in-out infinite;
}

@keyframes blink {
  0%,
  100% {
    opacity: 0.15;
  }
  50% {
    opacity: 0.45;
  }
}

/* ── Scan line (subtle) ── */
.scan {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0, 0, 0, 0.015) 3px,
    rgba(0, 0, 0, 0.015) 4px
  );
}

@media (max-width: 520px) {
  .hex-ring {
    width: 100%;
  }

  .member {
    width: clamp(72px, 26vw, 100px);
  }

  .brand h1 {
    letter-spacing: 0.35em;
    text-indent: 0.35em;
  }
}

/* ── Audio toggle ── */
.audio-toggle {
  position: fixed;
  bottom: 1.15rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  width: 2rem;
  height: 2rem;
  border: 1px solid rgba(201, 169, 98, 0.25);
  border-radius: 50%;
  background: rgba(5, 5, 8, 0.55);
  backdrop-filter: blur(6px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.audio-toggle:hover {
  border-color: rgba(201, 169, 98, 0.5);
  box-shadow: 0 0 16px rgba(201, 169, 98, 0.15);
}

.audio-toggle.on {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(201, 169, 98, 0.25);
}

.audio-icon {
  display: block;
  width: 0.55rem;
  height: 0.55rem;
  border: 1.5px solid rgba(232, 230, 227, 0.5);
  border-radius: 50%;
  position: relative;
}

.audio-icon::before,
.audio-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 0.35rem;
  height: 1px;
  background: rgba(232, 230, 227, 0.4);
}

.audio-icon::before {
  left: -0.45rem;
  transform: translateY(-50%) rotate(-30deg);
}

.audio-icon::after {
  right: -0.45rem;
  transform: translateY(-50%) rotate(30deg);
}

.audio-toggle.on .audio-icon {
  border-color: var(--accent);
}

.audio-toggle.on .audio-icon::before,
.audio-toggle.on .audio-icon::after {
  background: var(--accent);
  animation: sound-wave 0.8s ease-in-out infinite alternate;
}

@keyframes sound-wave {
  from {
    opacity: 0.4;
    width: 0.25rem;
  }
  to {
    opacity: 1;
    width: 0.45rem;
  }
}