.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 80;
  height: var(--header);
  border-bottom: 1px solid transparent;
  background: rgba(5, 7, 11, 0.58);
  backdrop-filter: blur(18px);
  transition: border-color 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line-soft);
  background: rgba(5, 7, 11, 0.9);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.brand-mark {
  display: grid;
  width: 35px;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(51, 232, 255, 0.52);
  border-radius: 50%;
  color: var(--cyan);
  box-shadow: inset 0 0 18px rgba(51, 232, 255, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav a {
  color: #cbd3df;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: color 160ms ease;
}

.nav a:hover {
  color: var(--cyan);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 860px;
  padding-top: var(--header);
  overflow: hidden;
  background:
    radial-gradient(circle at 72% 42%, rgba(51, 232, 255, 0.08), transparent 28%),
    radial-gradient(circle at 52% 16%, rgba(170, 125, 255, 0.08), transparent 24%),
    #05070b;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  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, rgba(0, 0, 0, 0.7), transparent 80%);
}

.hero-grid {
  position: relative;
  z-index: 2;
  min-height: calc(860px - var(--header));
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 4;
  max-width: 760px;
  padding: 84px 0 92px;
}

.hero-copy .lead {
  max-width: 650px;
  margin-top: 30px;
  color: #b8c1cf;
}

.hero-visual {
  position: absolute;
  inset: 0 0 0 39%;
  z-index: 1;
  pointer-events: none;
}

.hero-photo {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 72% 48%;
  transform: scale(1.04) translateX(-7%);
  filter: saturate(0.92) contrast(1.04) brightness(0.88);
}

.hero-photo::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(90deg, #05070b 0%, rgba(5, 7, 11, 0.95) 13%, rgba(5, 7, 11, 0.36) 42%, transparent 68%),
    linear-gradient(180deg, rgba(5, 7, 11, 0.06), rgba(5, 7, 11, 0.4) 84%, #05070b 100%);
}

.hero-photo::after {
  content: "";
  position: absolute;
  inset: auto 8% 10% auto;
  width: 290px;
  height: 290px;
  border: 1px solid rgba(51, 232, 255, 0.13);
  border-radius: 50%;
  box-shadow:
    0 0 80px rgba(51, 232, 255, 0.08),
    inset 0 0 80px rgba(170, 125, 255, 0.05);
}

.section {
  position: relative;
  padding: clamp(88px, 10vw, 150px) 0;
  border-top: 1px solid var(--line-soft);
}

.section:nth-of-type(odd) {
  background: rgba(255, 255, 255, 0.008);
}

.section-dark {
  background:
    radial-gradient(circle at 20% 0%, rgba(170, 125, 255, 0.07), transparent 30%),
    var(--bg-2);
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
  gap: clamp(46px, 8vw, 118px);
  align-items: start;
}

.signature-section {
  position: relative;
  padding: 28px 0;
  background: #070b11;
  border-top: 1px solid rgba(51, 232, 255, 0.12);
  border-bottom: 1px solid rgba(170, 125, 255, 0.12);
  overflow: hidden;
  align-items: center;
}

.signature-section::after {
  content: "";
  position: absolute;
  width: 38vw;
  height: 160px;
  right: -10vw;
  top: 50%;
  transform: translateY(-50%);
  background: radial-gradient(circle, rgba(51, 232, 255, 0.1), transparent 70%);
}

.signature-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr repeat(3, minmax(0, 0.9fr));
  gap: 24px;
  align-items: center;
}

.intent-layout {
  display: grid;
  grid-template-columns: 0.74fr 1.26fr;
  gap: 26px;
  margin-top: 56px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 56px;
}

.taichi-grid {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: clamp(48px, 8vw, 100px);
  align-items: center;
}

.taichi-image {
  position: relative;
  min-height: 620px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.taichi-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(5, 7, 11, 0.46));
}

.taichi-image img {
  width: 100%;
  height: 100%;
  min-height: 620px;
  object-fit: cover;
}

.system-map-section {
  background:
    radial-gradient(circle at 50% 48%, rgba(51, 232, 255, 0.09), transparent 26%),
    radial-gradient(circle at 34% 34%, rgba(170, 125, 255, 0.08), transparent 24%),
    radial-gradient(circle at 66% 68%, rgba(69, 240, 176, 0.07), transparent 24%),
    #05080d;
}

.system-map-heading {
  margin-bottom: 46px;
}

.system-map {
  position: relative;
  width: min(100%, 980px);
  aspect-ratio: 1;
  margin-inline: auto;
  border: 1px solid var(--line);
  border-radius: 42px;
  overflow: hidden;
  container-type: inline-size;
  background:
    radial-gradient(circle at 50% 50%, rgba(51, 232, 255, 0.075), transparent 25%),
    radial-gradient(circle at 38% 44%, rgba(170, 125, 255, 0.055), transparent 24%),
    radial-gradient(circle at 61% 58%, rgba(255, 209, 102, 0.045), transparent 23%),
    rgba(255, 255, 255, 0.012);
  box-shadow: inset 0 0 110px rgba(51, 232, 255, 0.025);
}

.system-map::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 72%;
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(51, 232, 255, 0.22);
  border-radius: 50%;
  box-shadow:
    0 0 80px rgba(51, 232, 255, 0.08),
    inset 0 0 70px rgba(170, 125, 255, 0.025);
}

.impact-grid,
.ecosystem-grid,
.authority-stats,
.logo-grid,
.testimonial-grid,
.faq-grid {
  display: grid;
}

.impact-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 52px;
}

.ecosystem-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 54px;
}

.authority-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(48px, 8vw, 110px);
  align-items: center;
}

.authority-photo {
  position: relative;
  min-height: 590px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.authority-photo img {
  width: 100%;
  height: 100%;
  min-height: 590px;
  object-fit: cover;
}

.authority-stats {
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 34px;
}

.logo-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin-top: 44px;
}

.testimonial-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 48px;
}

.faq-grid {
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(50px, 8vw, 110px);
  align-items: start;
}

.site-footer {
  padding: 54px 0 28px;
  border-top: 1px solid var(--line);
  background: #030509;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
}