:root {
  --bg: #07111d;
  --bg-soft: rgba(9, 19, 34, 0.84);
  --panel: rgba(11, 20, 36, 0.88);
  --line: rgba(136, 210, 255, 0.14);
  --line-strong: rgba(136, 210, 255, 0.22);
  --text: #f3f7ff;
  --muted: #9fb2cb;
  --accent: #79f3ff;
  --accent-2: #6a8dff;
  --radius-xl: 34px;
  --radius-lg: 26px;
  --radius-md: 20px;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
  --shell: min(1220px, calc(100% - 32px));
  --header-height: 88px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 8%, rgba(106, 141, 255, 0.15), transparent 26%),
    radial-gradient(circle at 92% 10%, rgba(121, 243, 255, 0.1), transparent 22%),
    linear-gradient(180deg, #06101a 0%, #08111f 52%, #091522 100%);
  font-family: "Noto Sans SC", "Manrope", "Segoe UI", sans-serif;
}

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

button {
  font: inherit;
}

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

.bg-orb {
  filter: blur(64px);
}

.orb-left {
  background: radial-gradient(circle at 12% 12%, rgba(106, 141, 255, 0.12), transparent 22%);
}

.orb-right {
  background: radial-gradient(circle at 88% 8%, rgba(121, 243, 255, 0.1), transparent 18%);
}

.bg-grid {
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(120, 162, 218, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 162, 218, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at center, black 50%, transparent 90%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 0 0 12px;
}

.header-shell {
  width: var(--shell);
  min-height: var(--header-height);
  margin: 0 auto;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 1px solid rgba(136, 210, 255, 0.1);
  border-top: 0;
  border-radius: 0 0 26px 26px;
  background: rgba(7, 14, 26, 0.76);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background:
    linear-gradient(135deg, rgba(121, 243, 255, 0.98), transparent 58%),
    linear-gradient(315deg, rgba(106, 141, 255, 0.9), transparent 66%),
    #effdff;
  box-shadow:
    0 0 18px rgba(121, 243, 255, 0.42),
    0 0 34px rgba(106, 141, 255, 0.22);
}

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

.brand-meta strong {
  font-size: 1rem;
  font-weight: 700;
}

.brand-meta em {
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  font-style: normal;
  text-transform: uppercase;
}

.site-nav,
.header-actions {
  display: flex;
  align-items: center;
}

.site-nav {
  gap: 8px;
  padding: 6px;
  border: 1px solid rgba(136, 210, 255, 0.1);
  border-radius: 999px;
  background: rgba(10, 18, 32, 0.66);
}

.site-nav a {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.94rem;
  transition: background 160ms ease, color 160ms ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
  background: rgba(121, 243, 255, 0.08);
}

.menu-toggle,
.lang-toggle {
  border: 1px solid rgba(136, 210, 255, 0.16);
  background: rgba(10, 18, 32, 0.7);
  color: var(--text);
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.lang-toggle {
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  cursor: pointer;
}

.page-shell,
.site-footer {
  position: relative;
  z-index: 1;
  width: var(--shell);
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 42px;
  align-items: center;
  min-height: calc(100vh - var(--header-height) - 40px);
  padding: 30px 0 48px;
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--accent);
  font-size: 0.8rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0;
  font-family: "Manrope", "Noto Sans SC", sans-serif;
  font-size: clamp(2.35rem, 3.4vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.05em;
}

.section-head h2,
.contact-card h2 {
  margin: 0;
  font-family: "Manrope", "Noto Sans SC", sans-serif;
  font-size: clamp(1.8rem, 2.4vw, 2.8rem);
  line-height: 1.14;
  letter-spacing: -0.04em;
}

.hero-text,
.section-copy,
.app-card p,
.system-card p,
.contact-text,
.stage-primary p,
.stage-mini-card p,
.footer-copy,
.footer-column p {
  color: var(--muted);
  line-height: 1.85;
}

.hero-text {
  max-width: 620px;
  margin: 24px 0 0;
  font-size: 0.98rem;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-pill,
.contact-label,
.stage-tag,
.app-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(121, 243, 255, 0.06);
  color: var(--accent);
  font-size: 0.84rem;
}

.hero-stage {
  position: relative;
}

.stage-shell,
.stage-primary,
.stage-mini-card,
.app-card,
.system-card,
.contact-card,
.footer-shell {
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 34%),
    var(--panel);
  box-shadow: var(--shadow);
}

.stage-shell {
  position: relative;
  padding: 22px;
  border-radius: var(--radius-xl);
}

.stage-shell::after {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: 26px;
  border: 1px solid rgba(136, 210, 255, 0.08);
  pointer-events: none;
}

.stage-topline {
  position: relative;
  z-index: 1;
}

.stage-label {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(121, 243, 255, 0.06);
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.stage-primary {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  padding: 28px;
  border-radius: 28px;
}

.stage-primary h2 {
  max-width: 420px;
  margin: 18px 0 14px;
  font-family: "Manrope", "Noto Sans SC", sans-serif;
  font-size: clamp(1.5rem, 1.7vw, 2.1rem);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.stage-primary p {
  max-width: 420px;
  margin: 0;
}

.stage-mini-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.stage-mini-card {
  padding: 20px 18px;
  border-radius: 22px;
}

.stage-mini-card span,
.system-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(121, 243, 255, 0.08);
  color: var(--accent);
  font-weight: 700;
}

.stage-mini-card strong {
  display: block;
  margin: 18px 0 10px;
  font-size: 1.1rem;
}

.section,
.contact-section {
  padding: 46px 0;
}

.section-head {
  display: grid;
  gap: 16px;
  margin-bottom: 28px;
}

.split-head {
  grid-template-columns: 1fr 0.88fr;
  align-items: end;
}

.section-copy {
  margin: 0;
}

.app-grid,
.system-grid {
  display: grid;
  gap: 18px;
}

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

.app-card,
.system-card {
  padding: 26px;
  border-radius: 26px;
}

.app-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin-bottom: 22px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.app-icon svg {
  width: 36px;
  height: 36px;
}

.app-icon-pdf {
  color: #8cc9ff;
}

.app-icon-clean {
  color: #8ef0cd;
}

.app-icon-weather {
  color: #ffd98d;
}

.app-card h3,
.system-card h3 {
  margin: 18px 0 12px;
  font-size: 1.16rem;
}

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

.contact-card {
  padding: 30px;
  border-radius: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.contact-text {
  max-width: 720px;
  margin: 18px 0 0;
}

.contact-meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-meta a {
  color: var(--text);
  font-size: 1.06rem;
}

.site-footer {
  padding: 8px 0 42px;
}

.footer-shell {
  display: grid;
  grid-template-columns: 1.15fr 0.8fr 0.9fr 0.95fr;
  gap: 24px;
  padding: 28px;
  border-radius: 30px;
}

.footer-brand {
  margin-bottom: 16px;
}

.footer-copy {
  max-width: 360px;
  margin: 0;
}

.footer-column {
  display: grid;
  gap: 10px;
  align-content: start;
}

.footer-title {
  margin-bottom: 6px;
  font-weight: 700;
}

.footer-column a,
.footer-column p {
  margin: 0;
  color: var(--muted);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 4px 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 680ms ease, transform 680ms ease;
}

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

@media (max-width: 1100px) {
  .hero,
  .split-head,
  .contact-card,
  .footer-shell {
    grid-template-columns: 1fr;
  }

  .app-grid,
  .system-grid,
  .stage-mini-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    display: grid;
  }
}

@media (max-width: 860px) {
  .header-shell {
    flex-wrap: wrap;
    padding: 16px;
    gap: 14px;
  }

  .menu-toggle {
    display: inline-flex;
    order: 2;
  }

  .site-nav {
    order: 4;
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border-radius: 22px;
  }

  body.menu-open .site-nav {
    display: flex;
  }

  .hero {
    min-height: auto;
    gap: 28px;
    padding-top: 18px;
  }

  .hero-copy h1 {
    font-size: clamp(2.1rem, 8vw, 3rem);
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  :root {
    --shell: min(100%, calc(100% - 20px));
  }

  .stage-shell,
  .stage-primary,
  .stage-mini-card,
  .app-card,
  .system-card,
  .contact-card,
  .footer-shell {
    padding: 18px;
  }

  .hero-copy h1,
  .section-head h2,
  .contact-card h2 {
    line-height: 1.16;
  }

  .contact-meta a {
    font-size: 1rem;
  }
}