:root {
  --bg: #040816;
  --bg-soft: #0a1430;
  --card: rgba(13, 27, 58, 0.7);
  --line: rgba(115, 154, 255, 0.22);
  --text: #eaf0ff;
  --text-soft: #b8c7ea;
  --primary: #4cc9f0;
  --secondary: #7b61ff;
  --accent: #4affb8;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 500px at 20% -10%, #162d67 0%, transparent 55%),
    radial-gradient(1000px 500px at 90% 20%, #2f1f6d 0%, transparent 50%),
    var(--bg);
  scroll-behavior: smooth;
}

body {
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, black 35%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(4, 8, 22, 0.6);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  min-height: 70px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.logo {
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-mark {
  font-family: "Orbitron", sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.1em;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  background: rgba(123, 97, 255, 0.2);
}

.logo-text {
  font-size: 0.98rem;
}

.nav {
  display: inline-flex;
  gap: 1.25rem;
}

.nav a {
  color: var(--text-soft);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
  padding: 5rem 0 3rem;
}

.eyebrow {
  font-family: "Orbitron", sans-serif;
  color: var(--primary);
  letter-spacing: 0.08em;
  margin: 0 0 0.8rem;
  font-size: 0.9rem;
}

h1,
h2,
h3 {
  margin: 0 0 0.8rem;
  line-height: 1.3;
}

h1 {
  font-size: clamp(2rem, 3.2vw, 3.3rem);
}

h2 {
  font-size: clamp(1.4rem, 2.2vw, 2rem);
}

.subtitle {
  color: var(--text-soft);
  line-height: 1.8;
  max-width: 44ch;
}

.hero-actions {
  margin-top: 1.6rem;
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #031123;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 10px 30px rgba(76, 201, 240, 0.35);
}

.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.hero-svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 1.2rem;
  border: 1px solid var(--line);
  box-shadow: 0 20px 80px rgba(32, 91, 238, 0.25);
}

.section {
  position: relative;
  z-index: 1;
  padding: 4rem 0;
}

.section-head {
  margin-bottom: 1.2rem;
}

.lead {
  color: var(--text-soft);
  line-height: 1.9;
  max-width: 72ch;
}

.cards {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

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

.cards-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: linear-gradient(180deg, rgba(27, 51, 102, 0.35), rgba(13, 27, 58, 0.65));
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.2rem;
}

.card p,
.card span {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.75;
}

.metric strong {
  display: block;
  margin-bottom: 0.5rem;
}

.section-dark {
  background: linear-gradient(180deg, rgba(14, 28, 60, 0.7), rgba(8, 14, 34, 0.9));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.scope-wrap {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.45fr 1fr;
}

.scope-card {
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.25rem;
  background: var(--card);
}

.scope-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-soft);
  line-height: 1.8;
}

.note {
  margin: 1rem 0 0;
  color: #97addf;
  font-size: 0.95rem;
}

.scope-svg {
  width: 100%;
  height: auto;
  display: block;
  margin-top: 1rem;
  border-radius: 0.8rem;
  border: 1px solid var(--line);
}

.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  padding: 2.2rem 0 1rem;
  background: rgba(4, 8, 22, 0.9);
}

.footer-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  text-align: center;
}

.contact {
  text-align: center;
}

.footer p {
  margin: 0.25rem 0;
  color: var(--text-soft);
}

.footer-bottom {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.copyright {
  margin: 1.2rem auto 0;
  width: 100%;
  max-width: var(--max);
  color: #90a4d6;
  font-size: 0.92rem;
  text-align: center;
}

.record {
  margin: 0.4rem auto 0;
  width: 100%;
  max-width: var(--max);
  font-size: 0.92rem;
  text-align: center;
}

.record a {
  display: inline-block;
  color: #90a4d6;
  text-decoration: none;
}

.record a:hover {
  color: var(--primary);
  text-decoration: underline;
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 3.5rem;
  }

  .cards-3,
  .cards-4,
  .scope-wrap {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .logo-text {
    display: none;
  }

  .nav {
    gap: 0.75rem;
    font-size: 0.92rem;
  }
}