:root {
  color-scheme: dark;
  --ink: #f3f0e7;
  --muted: #aaa99f;
  --panel: #12191e;
  --line: rgba(255, 255, 255, 0.12);
  --purchase: #e5a44f;
  --supplier: #54b9ad;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  color: var(--ink);
  background:
    radial-gradient(circle at 14% 18%, rgba(229, 164, 79, 0.11), transparent 26rem),
    radial-gradient(circle at 88% 72%, rgba(84, 185, 173, 0.1), transparent 30rem),
    linear-gradient(135deg, #0d1216 0%, #10171b 48%, #0a0f12 100%);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  pointer-events: none;
  opacity: 0.38;
  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: 38px 38px;
  mask-image: linear-gradient(to bottom, black, transparent 84%);
}

a {
  color: inherit;
}

.site-shell {
  width: min(1440px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 4.5rem);
  display: flex;
  flex-direction: column;
}

.brand-bar {
  min-height: 84px;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  border-bottom: 1px solid var(--line);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  gap: 3px;
  padding: 6px;
  border: 1px solid rgba(229, 164, 79, 0.7);
  transform: rotate(45deg);
}

.brand-mark span {
  display: block;
  background: var(--purchase);
}

.brand-mark span:nth-child(1) { height: 45%; }
.brand-mark span:nth-child(2) { height: 100%; }
.brand-mark span:nth-child(3) { height: 68%; }

.brand-name {
  margin-left: 0.45rem;
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.brand-tag {
  margin-left: auto;
  color: var(--muted);
  font: 600 0.68rem/1.2 "Avenir Next", "Helvetica Neue", sans-serif;
  letter-spacing: 0.24em;
}

.gateway {
  width: 100%;
  margin: auto 0;
  padding: clamp(3.25rem, 8vh, 7rem) 0 clamp(2.25rem, 6vh, 5rem);
}

.gateway-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(16rem, 0.8fr);
  align-items: end;
  column-gap: 4rem;
  margin-bottom: clamp(2.4rem, 5vh, 4.5rem);
}

.eyebrow {
  grid-column: 1 / -1;
  margin: 0 0 1rem;
  color: var(--purchase);
  font: 600 0.72rem/1.4 "Avenir Next", "Helvetica Neue", sans-serif;
  letter-spacing: 0.22em;
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 5.5vw, 5.4rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: 0.03em;
}

.intro-copy {
  max-width: 32rem;
  margin: 0 0 0.25rem;
  color: #c4c3ba;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  line-height: 1.9;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: rgba(6, 10, 12, 0.38);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
}

.portal-card {
  position: relative;
  min-height: 330px;
  padding: clamp(2rem, 4vw, 3.8rem);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  isolation: isolate;
  transition: background-color 220ms ease, transform 220ms ease;
}

.portal-card + .portal-card {
  border-left: 1px solid var(--line);
}

.portal-card::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  opacity: 0;
  transform: scale(1.08);
  transition: opacity 260ms ease, transform 360ms ease;
}

.portal-card-purchase::before {
  background: linear-gradient(145deg, rgba(229, 164, 79, 0.19), transparent 58%);
}

.portal-card-supplier::before {
  background: linear-gradient(145deg, rgba(84, 185, 173, 0.17), transparent 58%);
}

.portal-card:hover,
.portal-card:focus-visible {
  background-color: rgba(255, 255, 255, 0.025);
}

.portal-card:hover::before,
.portal-card:focus-visible::before {
  opacity: 1;
  transform: scale(1);
}

.portal-card:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: -6px;
}

.portal-index {
  position: absolute;
  top: 1.1rem;
  right: 1.5rem;
  color: rgba(255, 255, 255, 0.07);
  font: 300 clamp(4.5rem, 9vw, 8.5rem)/1 "Avenir Next", "Helvetica Neue", sans-serif;
}

.portal-kicker {
  color: var(--muted);
  font: 600 0.66rem/1.4 "Avenir Next", "Helvetica Neue", sans-serif;
  letter-spacing: 0.2em;
}

.portal-title {
  margin-top: 2.4rem;
  font-size: clamp(2.2rem, 4vw, 3.8rem);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.portal-description {
  max-width: 30rem;
  margin-top: 1.25rem;
  color: #b8b8b0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.92rem;
  line-height: 1.8;
}

.portal-action {
  margin-top: auto;
  padding-top: 2.8rem;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.92rem;
  font-weight: 650;
}

.portal-action span {
  display: inline-block;
  margin-left: 0.45rem;
  transition: transform 200ms ease;
}

.portal-card:hover .portal-action span,
.portal-card:focus-visible .portal-action span {
  transform: translateX(0.4rem);
}

.portal-card-purchase .portal-action { color: var(--purchase); }
.portal-card-supplier .portal-action { color: var(--supplier); }

.portal-track {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  transform: scaleX(0.2);
  transform-origin: left;
  transition: transform 320ms ease;
}

.portal-card-purchase .portal-track { background: var(--purchase); }
.portal-card-supplier .portal-track { background: var(--supplier); }

.portal-card:hover .portal-track,
.portal-card:focus-visible .portal-track {
  transform: scaleX(1);
}

.access-note {
  margin: 1.35rem 0 0;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: #85877f;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.76rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #62b985;
  box-shadow: 0 0 0 4px rgba(98, 185, 133, 0.12);
}

.site-footer {
  min-height: 72px;
  padding: 1rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  border-top: 1px solid var(--line);
  color: #777a75;
  text-align: center;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.75rem;
}

.site-footer a {
  text-underline-offset: 0.22em;
  transition: color 180ms ease;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--ink);
}

.footer-divider {
  width: 1px;
  height: 0.8rem;
  background: var(--line);
}

@media (max-width: 760px) {
  .site-shell {
    padding-inline: 1rem;
  }

  .brand-bar {
    min-height: 72px;
  }

  .brand-name {
    max-width: 14rem;
    font-size: 0.8rem;
    line-height: 1.5;
  }

  .brand-tag {
    display: none;
  }

  .gateway {
    padding: 3rem 0 2.2rem;
  }

  .gateway-intro {
    display: block;
    margin-bottom: 2rem;
  }

  .intro-copy {
    margin-top: 1.35rem;
  }

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

  .portal-card {
    min-height: 270px;
  }

  .portal-card + .portal-card {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .portal-title {
    margin-top: 1.7rem;
  }

  .site-footer {
    min-height: 86px;
    flex-direction: column;
    gap: 0.45rem;
  }

  .footer-divider {
    display: none;
  }
}

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