.portal-main { overflow: clip; }

.portal-hero {
  position: relative;
  display: flex;
  min-height: 88dvh;
  align-items: center;
  overflow: hidden;
  padding-top: var(--header-height);
  isolation: isolate;
}

.portal-hero-image,
.portal-hero-scrim {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.portal-hero-image {
  z-index: -2;
  object-fit: cover;
  object-position: center;
}

.portal-hero-scrim {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(7, 8, 9, 0.9) 0%, rgba(7, 8, 9, 0.64) 31%, rgba(7, 8, 9, 0.05) 60%),
    linear-gradient(180deg, rgba(7, 8, 9, 0.08) 55%, rgba(7, 8, 9, 0.78) 100%);
}

.portal-hero-copy {
  width: min(560px, 45vw);
  margin-left: clamp(36px, 7.5vw, 128px);
}

.portal-hero h1 {
  margin: 0;
  font-size: clamp(50px, 6.8vw, 108px);
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 0.98;
}

.portal-hero .english-name {
  margin: 22px 0 0;
  color: #d2d3d1;
  font: 500 clamp(17px, 1.45vw, 23px)/1 Arial, sans-serif;
  letter-spacing: 0.22em;
}

.portal-hero .lead {
  max-width: 430px;
  margin: clamp(34px, 5vh, 54px) 0 0;
  color: #c5c7c5;
  font-size: clamp(16px, 1.25vw, 20px);
  letter-spacing: 0.08em;
  line-height: 1.8;
}

.channel-section { padding: clamp(86px, 12vw, 170px) 0; }

.section-heading { max-width: 760px; }

.section-heading h2 {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 66px);
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.08;
  text-wrap: balance;
}

.section-heading p {
  max-width: 610px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 15px;
  letter-spacing: 0.05em;
  line-height: 1.8;
}

.channel-list { margin-top: clamp(64px, 8vw, 108px); }

.channel-row {
  display: grid;
  grid-template-columns: minmax(130px, 0.7fr) minmax(170px, 0.9fr) minmax(280px, 2fr) auto;
  min-height: 128px;
  align-items: center;
  gap: clamp(22px, 4vw, 72px);
  padding: 26px 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
  transition: padding-left 260ms cubic-bezier(0.16, 1, 0.3, 1), border-color 260ms ease;
}

.channel-row:last-child { border-bottom: 1px solid var(--line); }
.channel-row:hover { padding-left: 14px; border-color: rgba(240, 68, 33, 0.7); }

.channel-platform {
  color: var(--muted);
  font: 500 10px/1 Arial, sans-serif;
  letter-spacing: 0.16em;
}

.channel-row h3 {
  margin: 0;
  font-size: clamp(24px, 2.4vw, 38px);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.channel-row p {
  margin: 0;
  color: #b6b8b6;
  font-size: 14px;
  letter-spacing: 0.05em;
  line-height: 1.7;
}

.channel-action {
  color: var(--paper);
  font-size: 12px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.channel-action::after { content: " ↗"; color: var(--accent); }

.software-continuum {
  position: relative;
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(420px, 1.1fr);
  min-height: min(820px, 92dvh);
  overflow: hidden;
  padding: clamp(88px, 10vw, 156px) clamp(36px, 7.5vw, 128px);
  border-top: 1px solid var(--line);
  background: #070809;
}

.software-continuum::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 38%;
  height: 1px;
  background: var(--accent);
  content: "";
  opacity: 0.78;
}

.software-signal {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 52%;
  width: 1px;
  background: rgba(243, 243, 241, 0.11);
}

.software-signal span {
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform-origin: top;
}

.software-signal::after {
  position: absolute;
  top: 49%;
  left: 50%;
  width: 9px;
  height: 9px;
  border: 1px solid var(--accent);
  background: var(--ink);
  content: "";
  transform: translate(-50%, -50%) rotate(45deg);
}

.software-intro {
  align-self: center;
  max-width: 470px;
  padding-right: clamp(54px, 8vw, 132px);
}

.software-index {
  margin: 0 0 38px;
  color: var(--accent);
  font: 500 10px/1 Arial, sans-serif;
  letter-spacing: 0.2em;
}

.software-intro h2 {
  margin: 0;
  font-size: clamp(42px, 5.2vw, 78px);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.12;
  text-wrap: balance;
}

.software-intro > p:not(.software-index) {
  max-width: 430px;
  margin: 36px 0 48px;
  color: #b8bab8;
  font-size: 15px;
  letter-spacing: 0.05em;
  line-height: 1.9;
  text-wrap: pretty;
}

.software-flow {
  align-self: center;
  margin: 0;
  padding: 0 0 0 clamp(72px, 9vw, 144px);
  list-style: none;
}

.software-flow li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(92px, 0.7fr) minmax(130px, 1fr);
  min-height: 112px;
  align-content: center;
  gap: 9px clamp(24px, 3vw, 54px);
  border-top: 1px solid var(--line);
}

.software-flow li:last-child { border-bottom: 1px solid var(--line); }

.software-flow li::before {
  position: absolute;
  top: 50%;
  left: calc(clamp(72px, 9vw, 144px) * -1);
  width: clamp(44px, 6vw, 96px);
  height: 1px;
  background: rgba(243, 243, 241, 0.24);
  content: "";
}

.flow-code {
  grid-row: 1 / 3;
  align-self: center;
  color: #707371;
  font: 500 10px/1 Arial, sans-serif;
  letter-spacing: 0.16em;
}

.software-flow strong {
  color: var(--paper);
  font-size: clamp(19px, 1.7vw, 27px);
  font-weight: 400;
  letter-spacing: 0.08em;
}

.software-flow small {
  color: #777a78;
  font: 500 9px/1.4 Arial, sans-serif;
  letter-spacing: 0.13em;
}

@media (prefers-reduced-motion: no-preference) {
  .portal-hero-image { animation: portal-image-in 1200ms cubic-bezier(0.16, 1, 0.3, 1) both; }
  .portal-hero-copy { animation: portal-copy-in 760ms 120ms cubic-bezier(0.16, 1, 0.3, 1) both; }

  @supports (animation-timeline: view()) {
    .channel-row,
    .software-continuum {
      animation: section-rise linear both;
      animation-timeline: view();
      animation-range: entry 8% cover 26%;
    }
  }
}

@keyframes portal-image-in { from { opacity: 0.68; transform: scale(1.025); } to { opacity: 1; transform: scale(1); } }
@keyframes portal-copy-in { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes section-rise { from { opacity: 0.42; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 900px) {
  .portal-hero { min-height: 780px; align-items: flex-start; }
  .portal-hero-image { object-position: 57% center; opacity: 0.72; }
  .portal-hero-scrim {
    background:
      linear-gradient(180deg, rgba(7, 8, 9, 0.92) 0%, rgba(7, 8, 9, 0.35) 38%, rgba(7, 8, 9, 0.78) 100%),
      linear-gradient(90deg, rgba(7, 8, 9, 0.48), transparent 80%);
  }

  .portal-hero-copy {
    width: auto;
    margin: calc(var(--header-height) + 72px) 24px 0;
  }

  .portal-hero h1 { font-size: clamp(48px, 16vw, 74px); }
  .portal-hero .lead { max-width: 360px; }

  .channel-row {
    grid-template-columns: 92px 1fr auto;
    min-height: 112px;
    gap: 18px;
  }

  .channel-row p { grid-column: 2 / 4; margin-top: -18px; }

  .software-continuum {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 94px 24px 110px;
  }

  .software-continuum::before { width: 44%; }
  .software-signal { left: 24px; top: 390px; }
  .software-intro { max-width: 620px; padding: 0 0 86px 34px; }
  .software-flow { padding-left: 78px; }
  .software-flow li::before { left: -78px; width: 54px; }
}

@media (max-width: 560px) {
  .portal-hero { min-height: 700px; }
  .portal-hero-copy { margin-top: calc(var(--header-height) + 54px); }
  .portal-hero .english-name { font-size: 15px; }
  .portal-hero .lead { font-size: 15px; }

  .channel-section { padding-block: 84px; }
  .channel-list { margin-top: 54px; }
  .channel-row {
    grid-template-columns: 1fr auto;
    gap: 10px 18px;
    padding-block: 24px;
  }

  .channel-platform { grid-column: 1 / 3; }
  .channel-row p { grid-column: 1 / 3; margin-top: 0; }
  .channel-action { grid-column: 2; grid-row: 2; }

  .software-continuum { padding-inline: 20px; }
  .software-signal { left: 20px; top: 420px; }
  .software-intro { padding-left: 28px; }
  .software-intro h2 { font-size: clamp(40px, 12vw, 58px); }
  .software-flow { padding-left: 58px; }
  .software-flow li {
    grid-template-columns: 1fr;
    min-height: 118px;
    gap: 10px;
  }
  .software-flow li::before { left: -58px; width: 38px; }
  .flow-code { grid-row: auto; }
}