:root {
  --site-loader-black: #160000;
  --site-loader-red: #f40c3f;
  --site-loader-blood: #540000;
  --site-loader-ink: #fff0eb;
  --site-loader-rule: rgba(255, 240, 235, 0.24);
  --site-loader-progress: 0;
}

html.site-loader-active,
html.site-loader-active body {
  overflow: hidden !important;
  overscroll-behavior: none;
}

/* 新 Loader 已接管启动流程，旧的 React 红色 Y1C wipe 永久退役。 */
.intro-wipe {
  display: none !important;
  animation: none !important;
}

.site-loader {
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  min-width: 320px;
  overflow: hidden;
  color: var(--site-loader-ink);
  background: var(--site-loader-black);
  clip-path: inset(0 0 0 0);
  isolation: isolate;
  pointer-events: auto;
  transition: clip-path 650ms cubic-bezier(0.76, 0, 0.24, 1);
  animation: y1cLoaderFailsafe 6.75s steps(1, end) forwards;
}

.site-loader.is-exiting {
  clip-path: inset(0 0 100% 0);
  pointer-events: none;
}

.site-loader__matrix,
.site-loader__canvas,
.site-loader__center-vignette,
.site-loader__scanline {
  position: absolute;
  inset: 0;
}

.site-loader__matrix {
  z-index: 0;
  overflow: hidden;
  background: var(--site-loader-black);
}

.site-loader__canvas {
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0.72;
}

/* React Bits LetterGlitch 的 centerVignette=true 品牌化版本。 */
.site-loader__center-vignette {
  pointer-events: none;
  background:
    radial-gradient(
      ellipse at center,
      rgba(22, 0, 0, 0.96) 0%,
      rgba(22, 0, 0, 0.9) 24%,
      rgba(22, 0, 0, 0.32) 56%,
      rgba(22, 0, 0, 0) 76%
    ),
    linear-gradient(180deg, rgba(22, 0, 0, 0.28), transparent 28% 72%, rgba(22, 0, 0, 0.32));
}

.site-loader__matrix::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 240, 235, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 240, 235, 0.018) 1px, transparent 1px);
  background-size: 40px 40px;
  mix-blend-mode: screen;
}

.site-loader__scanline {
  z-index: 1;
  height: 2px;
  top: -2px;
  bottom: auto;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--site-loader-red) 18% 82%, transparent);
  box-shadow: 0 0 22px rgba(244, 12, 63, 0.6);
  opacity: 0.72;
  animation: y1cLoaderScan 2.8s linear infinite;
}

.site-loader__frame {
  position: absolute;
  inset: clamp(14px, 2.2vw, 32px);
  z-index: 2;
  display: grid;
  grid-template-rows: auto 1fr auto;
  border: 1px solid var(--site-loader-rule);
  background: rgba(22, 0, 0, 0.08);
  box-shadow:
    inset 0 0 0 1px rgba(244, 12, 63, 0.08),
    0 0 48px rgba(22, 0, 0, 0.32);
}

.site-loader__frame::before,
.site-loader__frame::after {
  position: absolute;
  width: clamp(52px, 8vw, 124px);
  height: 3px;
  content: "";
  background: var(--site-loader-red);
  box-shadow: 0 0 18px rgba(244, 12, 63, 0.44);
}

.site-loader__frame::before {
  top: -2px;
  left: -1px;
}

.site-loader__frame::after {
  right: -1px;
  bottom: -2px;
}

.site-loader__topline,
.site-loader__bottomline {
  display: grid;
  align-items: center;
  gap: 16px;
  min-height: 54px;
  padding: 10px clamp(14px, 2vw, 28px);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: clamp(10px, 0.85vw, 12px);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-loader__topline {
  grid-template-columns: auto 1fr;
  border-bottom: 1px solid var(--site-loader-rule);
}

.site-loader__brand,
.site-loader__telemetry,
.site-loader__lockline {
  display: flex;
  align-items: center;
}

.site-loader__brand {
  gap: 12px;
  white-space: nowrap;
}

.site-loader__brand-mark {
  display: inline-grid;
  place-items: center;
  min-width: 44px;
  min-height: 28px;
  border: 1px solid var(--site-loader-red);
  color: var(--site-loader-ink);
  background: rgba(244, 12, 63, 0.12);
  letter-spacing: 0.04em;
}

.site-loader__telemetry {
  justify-content: flex-end;
  gap: clamp(16px, 3vw, 44px);
  color: rgba(255, 240, 235, 0.62);
}

.site-loader__telemetry span {
  opacity: 0;
  transform: translateY(5px);
  transition:
    opacity 240ms ease,
    transform 360ms cubic-bezier(0.16, 1, 0.3, 1);
}

.site-loader__telemetry span.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.site-loader__core {
  align-self: center;
  width: min(1180px, calc(100% - clamp(28px, 8vw, 120px)));
  margin: 0 auto;
}

.site-loader__phase {
  margin: 0 0 clamp(18px, 2vw, 30px);
  color: var(--site-loader-red);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: clamp(10px, 1vw, 14px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 300ms ease,
    transform 480ms cubic-bezier(0.16, 1, 0.3, 1);
}

.site-loader[data-phase="calibrating"] .site-loader__phase,
.site-loader[data-phase="locked"] .site-loader__phase,
.site-loader[data-phase="exit"] .site-loader__phase {
  opacity: 1;
  transform: translateY(0);
}

.site-loader__glitch-text {
  position: relative;
  width: max-content;
  max-width: 100%;
  margin: 0;
  color: var(--site-loader-ink);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: clamp(2.5rem, 7.8vw, 9rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.065em;
  text-transform: uppercase;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(14px);
  user-select: none;
  transition:
    opacity 260ms ease,
    transform 620ms cubic-bezier(0.16, 1, 0.3, 1);
}

.site-loader__glitch-text.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* React Bits GlitchText：双伪元素切片，色彩收敛为 Signal Red / Warm Ink。 */
.site-loader__glitch-text::before,
.site-loader__glitch-text::after {
  position: absolute;
  inset: 0;
  overflow: hidden;
  content: attr(data-text);
  color: var(--site-loader-ink);
  background: rgba(22, 0, 0, 0.9);
  opacity: 0;
  pointer-events: none;
}

.site-loader__glitch-text.is-glitching::before {
  left: -4px;
  opacity: 0.86;
  text-shadow: 4px 0 var(--site-loader-red);
  animation: y1cLoaderGlitchBefore 880ms infinite linear alternate-reverse;
}

.site-loader__glitch-text.is-glitching::after {
  left: 4px;
  opacity: 0.72;
  text-shadow: -4px 0 rgba(255, 240, 235, 0.72);
  animation: y1cLoaderGlitchAfter 1.18s infinite linear alternate-reverse;
}

.site-loader__glitch-text.is-locked {
  text-shadow: 0 0 32px rgba(244, 12, 63, 0.2);
}

.site-loader__lockline {
  gap: 10px;
  min-height: 22px;
  margin-top: clamp(18px, 2.4vw, 34px);
  color: rgba(255, 240, 235, 0.72);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: clamp(10px, 0.9vw, 13px);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-loader__lock-indicator {
  width: 0;
  height: 2px;
  background: var(--site-loader-red);
  box-shadow: 0 0 14px rgba(244, 12, 63, 0.5);
  transition: width 520ms cubic-bezier(0.16, 1, 0.3, 1);
}

.site-loader__ready {
  opacity: 0;
  transform: translateX(-6px);
  transition:
    opacity 220ms ease 120ms,
    transform 440ms cubic-bezier(0.16, 1, 0.3, 1) 120ms;
}

.site-loader[data-phase="locked"] .site-loader__lock-indicator,
.site-loader[data-phase="exit"] .site-loader__lock-indicator {
  width: clamp(36px, 5vw, 72px);
}

.site-loader[data-phase="locked"] .site-loader__ready,
.site-loader[data-phase="exit"] .site-loader__ready {
  opacity: 1;
  transform: translateX(0);
}

.site-loader__bottomline {
  grid-template-columns: auto minmax(80px, 1fr) auto auto;
  border-top: 1px solid var(--site-loader-rule);
  color: rgba(255, 240, 235, 0.64);
}

.site-loader__stage {
  min-width: 18ch;
  color: var(--site-loader-ink);
}

.site-loader__progress {
  position: relative;
  height: 4px;
  overflow: hidden;
  background: rgba(255, 240, 235, 0.2);
}

.site-loader__progress-bar {
  position: absolute;
  inset: 0;
  background: var(--site-loader-red);
  box-shadow: 0 0 20px rgba(244, 12, 63, 0.72);
  transform: scaleX(var(--site-loader-progress));
  transform-origin: left center;
}

.site-loader__percentage,
.site-loader__countdown {
  min-width: 5ch;
  color: var(--site-loader-ink);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.site-loader__countdown {
  min-width: 7ch;
  color: var(--site-loader-red);
}

.site-loader__sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@keyframes y1cLoaderScan {
  from { transform: translateY(0); }
  to { transform: translateY(100svh); }
}

@keyframes y1cLoaderGlitchBefore {
  0% { clip-path: inset(18% 0 64% 0); transform: translate3d(-1px, 0, 0); }
  16% { clip-path: inset(62% 0 18% 0); transform: translate3d(3px, 0, 0); }
  34% { clip-path: inset(36% 0 44% 0); transform: translate3d(-2px, 0, 0); }
  52% { clip-path: inset(78% 0 6% 0); transform: translate3d(2px, 0, 0); }
  70% { clip-path: inset(9% 0 72% 0); transform: translate3d(-3px, 0, 0); }
  86% { clip-path: inset(48% 0 31% 0); transform: translate3d(1px, 0, 0); }
  100% { clip-path: inset(24% 0 58% 0); transform: translate3d(0, 0, 0); }
}

@keyframes y1cLoaderGlitchAfter {
  0% { clip-path: inset(72% 0 8% 0); transform: translate3d(2px, 0, 0); }
  18% { clip-path: inset(28% 0 54% 0); transform: translate3d(-3px, 0, 0); }
  38% { clip-path: inset(7% 0 74% 0); transform: translate3d(1px, 0, 0); }
  56% { clip-path: inset(56% 0 25% 0); transform: translate3d(-2px, 0, 0); }
  76% { clip-path: inset(40% 0 39% 0); transform: translate3d(3px, 0, 0); }
  100% { clip-path: inset(82% 0 4% 0); transform: translate3d(-1px, 0, 0); }
}

@keyframes y1cLoaderFailsafe {
  0%, 99% {
    visibility: visible;
    pointer-events: auto;
  }
  100% {
    visibility: hidden;
    pointer-events: none;
  }
}

@media (max-width: 760px) {
  .site-loader__frame {
    inset: 12px;
  }

  .site-loader__topline {
    grid-template-columns: 1fr;
    align-content: center;
    gap: 8px;
    min-height: 82px;
  }

  .site-loader__telemetry {
    justify-content: flex-start;
    gap: 10px 20px;
    flex-wrap: wrap;
  }

  .site-loader__telemetry span {
    font-size: 9px;
  }

  .site-loader__core {
    width: calc(100% - 28px);
  }

  .site-loader__glitch-text {
    width: min-content;
    max-width: 9.5ch;
    font-size: clamp(2.35rem, 14vw, 5.4rem);
    line-height: 0.92;
    white-space: normal;
  }

  .site-loader__bottomline {
    grid-template-columns: 1fr auto auto;
    gap: 8px 12px;
    min-height: 76px;
  }

  .site-loader__stage {
    min-width: 0;
  }

  .site-loader__progress {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

@media (max-height: 560px) {
  .site-loader__topline,
  .site-loader__bottomline {
    min-height: 46px;
  }

  .site-loader__phase {
    margin-bottom: 12px;
  }

  .site-loader__lockline {
    margin-top: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-loader {
    visibility: visible !important;
    animation: none !important;
    transition: none !important;
  }

  .site-loader.is-exiting {
    clip-path: inset(0 0 0 0);
    pointer-events: auto;
  }

  .site-loader__scanline {
    display: none;
  }

  .site-loader__canvas {
    opacity: 0.34;
  }

  .site-loader__progress-bar {
    opacity: 0.28;
    transform: scaleX(1);
  }

  .site-loader__telemetry span,
  .site-loader__phase,
  .site-loader__glitch-text,
  .site-loader__lock-indicator,
  .site-loader__ready {
    transition: none;
    transform: none;
  }

  .site-loader__glitch-text::before,
  .site-loader__glitch-text::after {
    display: none;
    content: none;
    animation: none;
  }
}