:root {
  --bg: #f6f8ff;
  --bg-soft: #ffffff;
  --text: #10192a;
  --text-soft: #58657a;
  --line: rgba(16, 25, 42, 0.1);
  --panel: rgba(255, 255, 255, 0.72);
  --accent: #6f6cff;
  --accent-2: #2fe0c8;
  --shadow: 0 28px 80px rgba(78, 92, 138, 0.14);
  --content: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family: Inter, "IBM Plex Sans", "Noto Sans SC", "PingFang SC", sans-serif;
  background:
    radial-gradient(circle at 14% 12%, rgba(111, 108, 255, 0.12), transparent 22%),
    radial-gradient(circle at 82% 18%, rgba(47, 224, 200, 0.14), transparent 22%),
    radial-gradient(circle at 62% 74%, rgba(156, 255, 108, 0.09), transparent 18%),
    linear-gradient(180deg, #fbfcff 0%, #f4f7ff 44%, #f9fbff 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(16, 25, 42, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 25, 42, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.34), transparent 86%);
}

.bright-shell {
  position: relative;
}

.bright-topbar,
.bright-hero,
.bright-section,
.bright-cta {
  width: min(calc(100% - 48px), var(--content));
  margin-inline: auto;
}

.bright-topbar {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 18px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 40px rgba(84, 96, 142, 0.08);
}

.bright-brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: inherit;
  text-decoration: none;
}

.bright-brand-mark {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow:
    0 0 0 8px rgba(111, 108, 255, 0.08),
    0 0 22px rgba(47, 224, 200, 0.18);
}

.bright-brand-copy {
  display: grid;
  gap: 3px;
}

.bright-brand-copy strong {
  font-size: 0.95rem;
}

.bright-brand-copy span {
  font-size: 0.78rem;
  color: var(--text-soft);
}

.bright-nav {
  display: inline-flex;
  gap: 22px;
}

.bright-nav a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 0.94rem;
}

.bright-nav a:hover,
.bright-nav a:focus-visible {
  color: var(--text);
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.8);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--text);
  transition: transform 180ms ease, opacity 180ms ease;
}

.bright-hero,
.bright-section,
.bright-cta {
  padding: 104px 0;
}

.bright-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 30px;
  align-items: center;
}

.hero-badges,
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid rgba(111, 108, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: #4a49bf;
  font-size: 0.84rem;
}

.pill-soft {
  color: #116b63;
  border-color: rgba(47, 224, 200, 0.18);
}

.kicker,
.mini-kicker,
.service-index,
.timeline-card span {
  margin: 18px 0 0;
  color: #4f5fd8;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-copy h1,
.section-header h2,
.cta-card h2 {
  margin: 14px 0 0;
  line-height: 0.98;
  letter-spacing: -0.05em;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.hero-copy h1 {
  max-width: 10ch;
  font-size: clamp(3rem, 6vw, 5.8rem);
}

.lead,
.section-header p,
.service-card p,
.timeline-card p,
.cta-card p,
.visual-panel p {
  color: var(--text-soft);
  line-height: 1.82;
  font-size: 1.02rem;
}

.lead {
  max-width: 60ch;
}

.hero-actions {
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  color: white;
  background: linear-gradient(135deg, var(--accent), #8c73ff 55%, var(--accent-2));
  box-shadow: 0 18px 34px rgba(111, 108, 255, 0.22);
}

.button-secondary {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.signal-strip div,
.visual-panel,
.service-card,
.system-panel,
.timeline-card,
.cta-card {
  border: 1px solid rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.66);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.signal-strip div {
  padding: 18px;
  border-radius: 20px;
}

.signal-strip span {
  display: block;
  color: var(--text-soft);
  font-size: 0.84rem;
}

.signal-strip strong {
  display: block;
  margin-top: 10px;
  font-size: 0.98rem;
}

.hero-visual {
  position: relative;
  min-height: 640px;
  border-radius: 36px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.72);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(243, 247, 255, 0.82));
  box-shadow: 0 30px 90px rgba(84, 96, 142, 0.14);
}

.gradient-halo {
  position: absolute;
  border-radius: 50%;
  filter: blur(18px);
}

.halo-a {
  top: 44px;
  right: 50px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(111, 108, 255, 0.22), transparent 70%);
}

.halo-b {
  bottom: 34px;
  left: 38px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(47, 224, 200, 0.18), transparent 70%);
}

.visual-panel {
  position: absolute;
  border-radius: 28px;
}

.visual-main {
  top: 38px;
  right: 34px;
  left: 34px;
  padding: 24px;
}

.visual-side {
  right: 34px;
  bottom: 34px;
  width: min(42%, 270px);
  padding: 22px;
}

.visual-head strong {
  display: block;
  margin-top: 8px;
  font-size: 1.32rem;
  letter-spacing: -0.03em;
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.visual-grid span {
  min-height: 116px;
  border: 1px solid rgba(111, 108, 255, 0.12);
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(246, 250, 255, 0.76));
  box-shadow:
    inset 0 0 22px rgba(111, 108, 255, 0.06),
    inset 0 0 30px rgba(47, 224, 200, 0.05);
}

.visual-side ul {
  padding: 0;
  margin: 14px 0 0;
  list-style: none;
}

.visual-side li {
  padding: 12px 0;
  border-top: 1px solid rgba(16, 25, 42, 0.08);
  color: var(--text-soft);
}

.floating-metric {
  position: absolute;
  min-width: 220px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 22px 48px rgba(84, 96, 142, 0.12);
}

.metric-a {
  left: 34px;
  bottom: 124px;
}

.metric-b {
  left: 34px;
  bottom: 34px;
}

.floating-metric span {
  display: block;
  color: var(--text-soft);
  font-size: 0.82rem;
}

.floating-metric strong {
  display: block;
  margin-top: 8px;
  font-size: 1rem;
}

.section-header {
  display: grid;
  gap: 12px;
  margin-bottom: 32px;
}

.section-header h2,
.cta-card h2 {
  max-width: 14ch;
  font-size: clamp(2rem, 4.2vw, 4rem);
}

.service-grid,
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-card,
.timeline-card {
  position: relative;
  min-height: 230px;
  padding: 24px;
  border-radius: 24px;
  overflow: hidden;
}

.service-card::before,
.timeline-card::before,
.system-panel::before,
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, rgba(111, 108, 255, 0.5), rgba(47, 224, 200, 0.2));
}

.service-card h3,
.timeline-card h3 {
  margin: 16px 0 10px;
  font-size: 1.26rem;
  letter-spacing: -0.02em;
}

.service-card-accent {
  background:
    radial-gradient(circle at 84% 18%, rgba(111, 108, 255, 0.12), transparent 18%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(245, 249, 255, 0.8));
}

.system-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.system-panel {
  position: relative;
  padding: 24px;
  border-radius: 30px;
  background:
    radial-gradient(circle at 84% 16%, rgba(47, 224, 200, 0.12), transparent 18%),
    radial-gradient(circle at 18% 78%, rgba(111, 108, 255, 0.1), transparent 18%),
    rgba(255, 255, 255, 0.72);
}

.system-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.system-row article {
  padding: 18px;
  border: 1px solid rgba(16, 25, 42, 0.08);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.76);
}

.system-row strong {
  display: block;
  margin-top: 10px;
  font-size: 1.04rem;
}

.system-flow {
  display: grid;
  gap: 12px;
  margin: 26px 0;
}

.flow-node {
  padding: 18px 20px;
  border: 1px solid rgba(16, 25, 42, 0.08);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.76);
  color: var(--text-soft);
}

.flow-node.active {
  color: var(--text);
  border-color: rgba(111, 108, 255, 0.18);
  box-shadow:
    inset 0 0 20px rgba(111, 108, 255, 0.05),
    0 0 30px rgba(47, 224, 200, 0.06);
}

.flow-line {
  width: 2px;
  height: 32px;
  margin-left: 22px;
  background: linear-gradient(180deg, rgba(111, 108, 255, 0.45), rgba(47, 224, 200, 0.18));
}

.system-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(16, 25, 42, 0.08);
  color: var(--text-soft);
  font-size: 0.9rem;
}

.bright-cta {
  padding-bottom: 120px;
}

.cta-card {
  position: relative;
  padding: 52px;
  border-radius: 34px;
  background:
    radial-gradient(circle at 82% 18%, rgba(111, 108, 255, 0.12), transparent 18%),
    radial-gradient(circle at 18% 78%, rgba(47, 224, 200, 0.12), transparent 18%),
    rgba(255, 255, 255, 0.74);
}

.cta-card p {
  max-width: 60ch;
}

.reveal,
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .menu-toggle span,
  .button {
    transition: none;
  }
}

@media (max-width: 1100px) {
  .bright-hero,
  .system-layout {
    grid-template-columns: 1fr;
  }

  .service-grid,
  .timeline-grid,
  .signal-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-visual {
    min-height: 620px;
  }
}

@media (max-width: 760px) {
  .bright-topbar,
  .bright-hero,
  .bright-section,
  .bright-cta {
    width: min(calc(100% - 28px), var(--content));
  }

  .bright-topbar {
    top: 12px;
    padding: 14px 16px;
    border-radius: 26px;
  }

  .menu-toggle {
    display: inline-block;
  }

  .menu-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-7px) rotate(-45deg);
  }

  .bright-nav {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    left: 0;
    display: grid;
    gap: 10px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.94);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition:
      opacity 180ms ease,
      transform 180ms ease,
      visibility 180ms ease;
  }

  .bright-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .bright-hero,
  .bright-section,
  .bright-cta {
    padding: 72px 0;
  }

  .hero-copy h1,
  .section-header h2,
  .cta-card h2 {
    max-width: none;
    font-size: clamp(2.2rem, 10.6vw, 3.8rem);
    letter-spacing: -0.03em;
  }

  .signal-strip,
  .service-grid,
  .timeline-grid,
  .system-row {
    grid-template-columns: 1fr;
  }

  .service-card,
  .timeline-card,
  .system-panel,
  .cta-card {
    padding: 22px;
  }

  .hero-actions .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 700px;
  }

  .visual-main {
    top: 22px;
    left: 22px;
    right: 22px;
  }

  .visual-side {
    left: 22px;
    right: 22px;
    bottom: 146px;
    width: auto;
  }

  .metric-a {
    left: 22px;
    right: 22px;
    bottom: 78px;
  }

  .metric-b {
    left: 22px;
    right: 22px;
    bottom: 22px;
  }
}