:root {
  color-scheme: dark;
  --bg-primary: #050816;
  --bg-secondary: #091120;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.1);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent: #67e8f9;
  --accent-soft: rgba(103, 232, 249, 0.12);
  --shadow: 0 20px 70px rgba(0, 0, 0, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text-primary);
  font-family: 'Noto Sans SC', 'Segoe UI', sans-serif;
  background:
    radial-gradient(circle at top, rgba(8, 145, 178, 0.16), transparent 26%),
    linear-gradient(180deg, #07101f 0%, #050816 48%, #06101f 100%);
  line-height: 1.6;
}

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

button {
  font: inherit;
}

img {
  max-width: 100%;
  display: block;
}

::selection {
  color: #ffffff;
  background: rgba(103, 232, 249, 0.28);
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.bg-orb,
.bg-grid {
  pointer-events: none;
  position: fixed;
  inset: 0;
}

.bg-orb-left {
  background: radial-gradient(circle at 14% 10%, rgba(34, 211, 238, 0.18), transparent 26%);
}

.bg-orb-right {
  background:
    radial-gradient(circle at 82% 14%, rgba(56, 189, 248, 0.14), transparent 24%),
    radial-gradient(circle at 88% 82%, rgba(16, 185, 129, 0.1), transparent 26%);
}

.bg-grid {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at center, #000000, transparent 85%);
  opacity: 0.45;
}

.container {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid transparent;
  background: rgba(5, 8, 22, 0.45);
  backdrop-filter: blur(20px);
  transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  border-color: var(--border);
  background: rgba(5, 8, 22, 0.78);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 80px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark,
.icon-chip,
.feature-icon,
.spark-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(103, 232, 249, 0.22);
  background: rgba(103, 232, 249, 0.1);
  color: #cffafe;
  box-shadow: inset 0 0 20px rgba(103, 232, 249, 0.07);
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 18px;
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.brand-copy {
  display: grid;
  gap: 4px;
}

.brand-copy strong,
.section-title,
.hero-copy h1,
.product-card h3,
.feature-card h3,
.value-card h3,
.scenario-card h3,
.hero-panel h2,
.footer-copy h2 {
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
}

.brand-copy strong {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

.brand-copy span {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: #dbeafe;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero-section {
  position: relative;
  padding: 56px 0 56px;
}

.hero-grid,
.split-layout,
.footer-panel {
  display: grid;
  gap: 32px;
}

.hero-grid {
  align-items: center;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  min-height: calc(100vh - 140px);
}

.hero-copy h1 {
  margin: 20px 0 24px;
  font-size: clamp(3.2rem, 8vw, 7rem);
  line-height: 0.95;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-description,
.section-desc,
.body-text,
.panel-text p {
  color: var(--text-secondary);
}

.hero-description {
  max-width: 760px;
  font-size: 1.08rem;
  line-height: 1.95;
}

.eyebrow,
.card-code,
.meta-label,
.panel-label {
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: rgba(186, 230, 253, 0.9);
  font-size: 0.7rem;
}

.eyebrow-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(103, 232, 249, 0.8);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  border-color: rgba(103, 232, 249, 0.36);
  background: rgba(103, 232, 249, 0.1);
  color: #d9f9ff;
}

.btn-primary:hover {
  background: rgba(103, 232, 249, 0.18);
}

.btn-secondary {
  color: #e2e8f0;
  background: rgba(255, 255, 255, 0.02);
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.06);
}

.stats-grid,
.cards-grid,
.panel-grid,
.tag-columns,
.info-grid,
.footer-grid {
  display: grid;
  gap: 16px;
}

.stats-grid {
  margin-top: 32px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.surface-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.surface-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), transparent 38%);
  pointer-events: none;
}

.stat-card {
  padding: 22px 20px;
}

.stat-card strong {
  display: block;
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
  font-size: 2rem;
}

.stat-card span {
  display: block;
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.hero-panel {
  overflow: hidden;
  padding: 0;
}

.panel-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top, rgba(34, 211, 238, 0.2), transparent 36%),
    linear-gradient(160deg, rgba(255, 255, 255, 0.08), transparent 40%);
}

.panel-head,
.panel-text,
.panel-grid {
  position: relative;
  z-index: 1;
}

.panel-head,
.panel-text,
.panel-grid {
  padding-left: 32px;
  padding-right: 32px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 32px;
}

.panel-label,
.card-code,
.meta-label {
  color: rgba(186, 230, 253, 0.78);
  font-size: 0.72rem;
}

.hero-panel h2,
.footer-copy h2 {
  margin: 14px 0 0;
  font-size: 1.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.spark-badge,
.icon-chip,
.feature-icon {
  border-radius: 24px;
}

.spark-badge {
  width: 64px;
  height: 64px;
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
}

.panel-divider {
  position: relative;
  z-index: 1;
  margin: 24px 0;
  height: 1px;
  background: var(--border);
}

.panel-text {
  display: grid;
  gap: 12px;
}

.panel-grid {
  padding-bottom: 32px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mini-card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(0, 0, 0, 0.16);
}

.mini-card p {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.mini-card strong {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.8;
}

.scroll-indicator {
  display: inline-flex;
  margin: 12px auto 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.content-section {
  padding: 64px 0;
}

.split-layout {
  grid-template-columns: minmax(280px, 0.86fr) minmax(0, 1.14fr);
  align-items: start;
}

.section-intro {
  max-width: 720px;
}

.section-intro-wide {
  margin-bottom: 40px;
}

.section-title {
  margin: 18px 0 18px;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-desc {
  margin: 0;
  font-size: 1rem;
  line-height: 1.9;
}

.info-grid {
  padding: 28px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.info-grid strong {
  display: block;
  margin-top: 12px;
  font-size: 1.55rem;
  font-weight: 500;
  line-height: 1.6;
}

.body-text {
  margin: 0;
  line-height: 1.9;
}

.span-2 {
  grid-column: span 2;
}

.cards-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cards-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards-grid-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.product-card,
.feature-card,
.value-card,
.scenario-card {
  padding: 28px;
}

.card-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.product-card h3,
.feature-card h3,
.value-card h3,
.scenario-card h3 {
  margin: 12px 0 0;
  font-size: 1.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.icon-chip,
.feature-icon {
  width: 56px;
  height: 56px;
  font-size: 1rem;
  flex-shrink: 0;
}

.tag-columns {
  margin-top: 22px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.tag-list span {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: #e2e8f0;
  font-size: 0.78rem;
}

.tag-list.accent span {
  border-color: rgba(103, 232, 249, 0.22);
  background: var(--accent-soft);
  color: #d7faff;
}

.feature-card,
.value-card,
.scenario-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-card h3,
.value-card h3,
.scenario-card h3 {
  margin: 0;
}

.scenario-card {
  min-height: 260px;
}

.site-footer {
  padding: 24px 0 72px;
}

.footer-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 32px;
  padding: 34px;
}

.footer-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.footer-record {
  grid-column: 1 / -1;
  padding-top: 4px;
  text-align: center;
}

.footer-record a {
  color: var(--text-muted);
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

.footer-record a:hover {
  color: var(--accent);
}

@media (max-width: 1150px) {
  .cards-grid-5 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 24px;
    right: 24px;
    top: calc(100% + 12px);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: rgba(5, 8, 22, 0.94);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 14px 12px;
    border-radius: 14px;
  }

  .site-nav a:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .hero-grid,
  .split-layout,
  .footer-panel,
  .cards-grid-2,
  .cards-grid-3,
  .cards-grid-5,
  .tag-columns {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    min-height: auto;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 32px, 1180px);
  }

  .header-inner {
    min-height: 74px;
  }

  .hero-section {
    padding-top: 40px;
  }

  .hero-copy h1 {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }

  .hero-description {
    font-size: 1rem;
  }

  .stats-grid,
  .info-grid,
  .panel-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: auto;
  }

  .panel-head,
  .panel-text,
  .panel-grid {
    padding-left: 24px;
    padding-right: 24px;
  }

  .spark-badge {
    width: 54px;
    height: 54px;
  }

  .product-card,
  .feature-card,
  .value-card,
  .scenario-card,
  .footer-panel {
    padding: 24px;
  }

  .section-title {
    font-size: 1.85rem;
  }
}