:root {
  color-scheme: dark;
  --bg: #070708;
  --panel: #111114;
  --line: rgba(255, 255, 255, 0.13);
  --muted: rgba(255, 255, 255, 0.52);
  --text: #f5f5f2;
  --aigc: #b8ff3d;
  --ui: #6f5cff;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 7%, rgba(184, 255, 61, 0.07), transparent 28rem),
    radial-gradient(circle at 87% 83%, rgba(111, 92, 255, 0.09), transparent 32rem),
    var(--bg);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.28;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}

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

.page-shell {
  display: flex;
  width: min(100%, 1680px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 24px clamp(20px, 4vw, 72px) 22px;
  flex-direction: column;
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.brand-mark {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--aigc);
  box-shadow: 0 0 18px rgba(184, 255, 61, 0.8);
}

.header-note,
.site-footer,
.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.13em;
}

.main-content {
  display: grid;
  flex: 1;
  padding: clamp(56px, 9vh, 112px) 0 clamp(48px, 8vh, 96px);
  grid-template-columns: minmax(260px, 0.72fr) minmax(560px, 1.28fr);
  gap: clamp(48px, 7vw, 124px);
  align-items: end;
}

.intro {
  align-self: center;
}

.eyebrow {
  margin-bottom: 26px;
}

h1 {
  max-width: 620px;
  margin: 0;
  font-size: clamp(46px, 5vw, 84px);
  font-weight: 520;
  line-height: 1.06;
  letter-spacing: -0.055em;
}

.intro-copy {
  max-width: 410px;
  margin: 32px 0 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 15px;
  line-height: 1.8;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 1.5vw, 24px);
}

.portfolio-card {
  position: relative;
  display: flex;
  min-height: clamp(400px, 52vh, 620px);
  padding: clamp(24px, 2.2vw, 38px);
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(17, 17, 20, 0.82);
  isolation: isolate;
  transition:
    border-color 350ms ease,
    transform 350ms cubic-bezier(0.2, 0.8, 0.2, 1),
    background-color 350ms ease;
}

.portfolio-card::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  opacity: 0;
  transition: opacity 400ms ease;
}

.portfolio-card--aigc::before {
  background:
    radial-gradient(circle at 65% 28%, rgba(184, 255, 61, 0.22), transparent 34%),
    linear-gradient(145deg, rgba(184, 255, 61, 0.09), transparent 55%);
}

.portfolio-card--ui::before {
  background:
    radial-gradient(circle at 25% 30%, rgba(111, 92, 255, 0.28), transparent 38%),
    linear-gradient(145deg, rgba(111, 92, 255, 0.08), transparent 55%);
}

.portfolio-card:hover,
.portfolio-card:focus-visible {
  border-color: rgba(255, 255, 255, 0.38);
  outline: none;
  transform: translateY(-8px);
}

.portfolio-card:hover::before,
.portfolio-card:focus-visible::before {
  opacity: 1;
}

.portfolio-card:focus-visible {
  box-shadow: 0 0 0 3px var(--bg), 0 0 0 5px rgba(255, 255, 255, 0.75);
}

.card-index,
.card-arrow {
  position: absolute;
  top: clamp(24px, 2.2vw, 38px);
  z-index: 2;
}

.card-index {
  left: clamp(24px, 2.2vw, 38px);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.15em;
}

.card-arrow {
  right: clamp(24px, 2.2vw, 38px);
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 20px;
  line-height: 38px;
  text-align: center;
  transition:
    color 300ms ease,
    border-color 300ms ease,
    transform 350ms ease;
}

.portfolio-card:hover .card-arrow,
.portfolio-card:focus-visible .card-arrow {
  border-color: currentColor;
  transform: rotate(45deg);
}

.portfolio-card--aigc:hover .card-arrow,
.portfolio-card--aigc:focus-visible .card-arrow {
  color: var(--aigc);
}

.portfolio-card--ui:hover .card-arrow,
.portfolio-card--ui:focus-visible .card-arrow {
  color: #a99fff;
}

.card-content {
  position: relative;
  z-index: 2;
  display: flex;
  margin-top: auto;
  flex-direction: column;
  align-items: flex-start;
}

.card-label {
  margin-bottom: 17px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.13em;
}

.card-content strong {
  font-size: clamp(48px, 4vw, 72px);
  font-weight: 540;
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.card-title-cn {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.card-orbit {
  position: absolute;
  z-index: 0;
  border: 1px solid rgba(184, 255, 61, 0.2);
  border-radius: 50%;
  transition: border-color 350ms ease, transform 700ms ease;
}

.orbit-one {
  top: 20%;
  right: -18%;
  width: 68%;
  aspect-ratio: 1;
}

.orbit-two {
  top: 7%;
  right: -3%;
  width: 42%;
  aspect-ratio: 1;
}

.portfolio-card--aigc:hover .orbit-one,
.portfolio-card--aigc:focus-visible .orbit-one {
  border-color: rgba(184, 255, 61, 0.58);
  transform: scale(1.12) rotate(18deg);
}

.portfolio-card--aigc:hover .orbit-two,
.portfolio-card--aigc:focus-visible .orbit-two {
  border-color: rgba(184, 255, 61, 0.42);
  transform: translate(-18px, 16px) scale(0.92);
}

.ui-window {
  position: absolute;
  border: 1px solid rgba(169, 159, 255, 0.3);
  background: rgba(111, 92, 255, 0.05);
  transition:
    border-color 350ms ease,
    transform 500ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.ui-window--back {
  top: 17%;
  left: 9%;
  width: 63%;
  height: 25%;
}

.ui-window--front {
  top: 24%;
  left: 20%;
  display: flex;
  width: 70%;
  height: 28%;
  padding: 14px;
  gap: 6px;
  background: rgba(13, 12, 24, 0.9);
}

.ui-window--front i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(169, 159, 255, 0.55);
}

.portfolio-card--ui:hover .ui-window,
.portfolio-card--ui:focus-visible .ui-window {
  border-color: rgba(169, 159, 255, 0.72);
}

.portfolio-card--ui:hover .ui-window--back,
.portfolio-card--ui:focus-visible .ui-window--back {
  transform: translate(-7px, -9px);
}

.portfolio-card--ui:hover .ui-window--front,
.portfolio-card--ui:focus-visible .ui-window--front {
  transform: translate(8px, 10px);
}

.site-footer {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1040px) {
  .main-content {
    grid-template-columns: 1fr;
    gap: 54px;
    align-items: initial;
  }

  .intro {
    align-self: auto;
  }

  h1 {
    font-size: clamp(50px, 9vw, 78px);
  }

  .portfolio-card {
    min-height: 480px;
  }
}

@media (max-width: 680px) {
  .page-shell {
    padding: 20px 16px 18px;
  }

  .main-content {
    padding: 58px 0 52px;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-card {
    min-height: 380px;
  }

  h1 {
    font-size: clamp(44px, 13vw, 62px);
  }

  .intro-copy {
    margin-top: 24px;
  }

  .header-note,
  .site-footer p:first-child {
    display: none;
  }

  .site-footer {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}