:root {
  color-scheme: dark;
  --acid: #d8ff22;
  --ink: #050505;
  --white: #f4f4ef;
  --muted: rgba(244, 244, 239, 0.64);
  --edge: rgba(244, 244, 239, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-width: 320px;
  margin: 0;
  background: var(--ink);
}

body {
  color: var(--white);
  font-family: "Arial Narrow", "Microsoft YaHei UI", "PingFang SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.scene {
  position: relative;
  isolation: isolate;
  width: 100%;
  min-height: 680px;
  height: 100svh;
  overflow: hidden;
  background: #030303;
}

.scene::after {
  position: absolute;
  z-index: 3;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.22) 0%, transparent 19%, transparent 67%, rgba(0, 0, 0, 0.3) 100%),
    radial-gradient(circle at 50% 44%, transparent 0 28%, rgba(0, 0, 0, 0.06) 55%, rgba(0, 0, 0, 0.34) 100%);
}

.scene-art,
.architecture,
.architecture-shade,
.monolith {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.scene-art {
  z-index: 0;
  background: #030303;
  pointer-events: none;
}

.architecture {
  object-fit: cover;
  object-position: center center;
  filter: brightness(0.72) contrast(1.1) saturate(0.7);
  transform: scale(1.015);
}

.architecture-shade {
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.06) 0 42%, rgba(0, 0, 0, 0.4) 42% 44%, transparent 50% 62%, rgba(0, 0, 0, 0.28) 69% 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.58) 0 21%, transparent 48% 72%, rgba(0, 0, 0, 0.12) 100%);
}

.monolith {
  object-fit: cover;
  object-position: center center;
  mix-blend-mode: screen;
  filter: saturate(1.2) contrast(1.04) brightness(1.06);
  opacity: 0.96;
  transform: translateX(1.7%) scaleX(0.9);
  transform-origin: center center;
}

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  width: 100%;
  padding: 24px 32px 0;
}

.brand {
  display: inline-flex;
  gap: 9px;
  align-items: baseline;
  font-size: clamp(22px, 2vw, 32px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1;
}

.brand-index {
  color: var(--acid);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  gap: 0;
  align-items: center;
  justify-content: space-between;
  width: min(31vw, 470px);
  font-family: "Microsoft YaHei UI", "PingFang SC", sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.nav a {
  position: relative;
  padding: 2px 0 8px;
  color: rgba(255, 255, 255, 0.72);
  transition: color 180ms ease;
}

.nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--acid);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.nav a:hover,
.nav a:focus-visible {
  color: #fff;
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.portal {
  position: absolute;
  z-index: 6;
  display: block;
  outline: none;
}

.portal-design {
  top: 17%;
  left: 0;
  width: 44%;
  height: 64%;
}

.portal-ai {
  top: 22%;
  right: 0;
  width: 37%;
  height: 63%;
}

.portal-copy {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.portal-design .portal-copy {
  top: 40%;
  left: 17%;
  transform: rotate(3.6deg);
  transform-origin: left center;
}

.portal-ai .portal-copy {
  top: 42.5%;
  left: 17%;
}

.portal-title {
  display: block;
  font-family: "Arial Narrow", "Microsoft YaHei UI", "PingFang SC", sans-serif;
  font-weight: 800;
  letter-spacing: -0.075em;
  line-height: 0.94;
  text-wrap: nowrap;
}

.portal-design .portal-title {
  font-size: clamp(55px, 4.8vw, 76px);
}

.portal-ai .portal-title {
  font-size: clamp(39px, 3.03vw, 48px);
}

.portal-rule {
  display: block;
  height: 1px;
  margin: 14px 0 0;
  background: rgba(255, 255, 255, 0.88);
}

.portal-subtitle {
  margin-top: 17px;
  color: rgba(255, 255, 255, 0.73);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1;
}

.portal-design .portal-rule {
  width: 146px;
}

.portal-ai .portal-rule {
  width: 112px;
}

.portal-ai .portal-subtitle {
  font-size: 12px;
}

.portal-button {
  position: absolute;
  display: grid;
  width: clamp(82px, 6.25vw, 99px);
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid var(--acid);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.34);
  box-shadow: 0 0 0 1px rgba(216, 255, 34, 0.05) inset;
  transition:
    background-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.portal-design .portal-button {
  top: 50%;
  left: 68%;
}

.portal-ai .portal-button {
  top: 37.5%;
  left: 41%;
}

.portal-button img {
  width: 47%;
  height: 47%;
  filter: invert(93%) sepia(100%) saturate(4670%) hue-rotate(20deg) brightness(108%) contrast(105%);
  transition: filter 180ms ease;
}

.portal:hover .portal-button,
.portal:focus-visible .portal-button {
  background: var(--acid);
  box-shadow: 0 0 44px rgba(216, 255, 34, 0.24);
  transform: translateX(7px);
}

.portal:hover .portal-button img,
.portal:focus-visible .portal-button img {
  filter: brightness(0);
}

.scene-meta {
  position: absolute;
  z-index: 10;
  bottom: 21.5%;
  left: 7.35%;
  display: flex;
  gap: 38px;
  align-items: stretch;
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1;
}

.meta-block {
  display: grid;
  min-width: 120px;
  gap: 10px;
  padding-right: 26px;
  border-right: 1px solid rgba(255, 255, 255, 0.28);
}

.meta-block:last-child {
  min-width: 82px;
  padding-right: 0;
  border-right: 0;
}

.meta-block small {
  color: rgba(255, 255, 255, 0.58);
  font-size: 7px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.meta-block b {
  color: rgba(255, 255, 255, 0.84);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.scene-meta a {
  transition: color 180ms ease;
}

.scene-meta a:hover,
.scene-meta a:focus-visible {
  color: #fff;
}

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

@media (max-width: 900px) {
  .site-header {
    padding: 21px 20px 0;
  }

  .portal-design {
    width: 51%;
  }

  .portal-ai {
    width: 44%;
  }

  .portal-design .portal-copy {
    left: 10%;
  }

  .portal-ai .portal-copy {
    left: 10%;
  }

  .scene-meta {
    left: 20px;
  }
}

@media (max-width: 680px) {
  .scene {
    min-height: 620px;
  }

  .architecture {
    object-position: center center;
    filter: brightness(0.54) contrast(1.16);
  }

  .architecture-shade {
    background: rgba(0, 0, 0, 0.22);
  }

  .monolith {
    width: 170%;
    left: -35%;
    opacity: 0.42;
    transform: none;
  }

  .brand {
    font-size: 13px;
  }

  .brand-index,
  .nav a:last-child {
    display: none;
  }

  .nav {
    gap: 14px;
    font-size: 9px;
  }

  .portal {
    right: 0;
    left: 0;
    width: 100%;
    height: calc(50% - 40px);
  }

  .portal-design {
    top: 68px;
    border-bottom: 1px solid var(--edge);
  }

  .portal-ai {
    top: calc(50% + 30px);
  }

  .portal-design .portal-copy,
  .portal-ai .portal-copy {
    top: 18%;
    left: 22px;
  }

  .portal-design .portal-title,
  .portal-ai .portal-title {
    font-size: clamp(44px, 14vw, 72px);
    line-height: 0.9;
  }

  .portal-rule {
    width: 44px;
    margin: 12px 0 10px;
  }

  .portal-subtitle {
    font-size: 9px;
  }

  .portal-button,
  .portal-design .portal-button,
  .portal-ai .portal-button {
    top: 36%;
    right: 24px;
    left: auto;
    width: 68px;
  }

  .scene-meta {
    right: 20px;
    bottom: 17px;
    justify-content: space-between;
  }

  .scene-meta span:nth-child(2),
  .scene-meta span:nth-child(3),
  .scene-meta a {
    display: none;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .monolith {
    animation: monolith-breathe 5s ease-in-out infinite alternate;
  }
}

@keyframes monolith-breathe {
  from {
    filter: saturate(1.16) contrast(1.04) brightness(0.98);
  }
  to {
    filter: saturate(1.24) contrast(1.05) brightness(1.11);
  }
}