:root {
  --bg: #070b14;
  --text: #e2e8f0;
  --subtext: #94a3b8;
  --cyan: #22d3ee;
  --cyan-strong: #0891b2;
  --border: rgb(34 211 238 / 14%);
  --surface: rgb(12 18 34 / 72%);
  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'Orbitron', 'Noto Sans SC', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-sans);
  background: var(--bg);
  line-height: 1.6;
}

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

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 70% 55% at 0% 0%, rgb(34 211 238 / 14%), transparent 55%),
    radial-gradient(ellipse 55% 45% at 100% 100%, rgb(8 145 178 / 12%), transparent 50%),
    linear-gradient(165deg, #070b14 0%, #0c1222 42%, #101827 100%);
}

.page-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgb(34 211 238 / 4%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(34 211 238 / 4%) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgb(0 0 0 / 55%), transparent 80%);
  pointer-events: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  backdrop-filter: blur(16px);
  background: rgb(7 11 20 / 72%);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand img {
  border-radius: 8px;
}

.topbar__nav {
  display: flex;
  gap: 1.25rem;
  color: var(--subtext);
  font-size: 0.92rem;
}

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

.topbar__cta {
  padding: 0.45rem 0.9rem;
  border-radius: 0.7rem;
  border: 1px solid rgb(34 211 238 / 35%);
  background: linear-gradient(135deg, #22d3ee 0%, #0891b2 100%);
  color: #042f2e;
  font-weight: 600;
  font-size: 0.85rem;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: end;
  overflow: hidden;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  animation: heroDrift 18s ease-in-out infinite alternate;
}

.hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgb(7 11 20 / 28%) 0%, rgb(7 11 20 / 55%) 42%, rgb(7 11 20 / 92%) 100%),
    linear-gradient(90deg, rgb(7 11 20 / 55%) 0%, transparent 48%);
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: clamp(5rem, 12vh, 8rem) clamp(1.25rem, 5vw, 3rem) clamp(3rem, 8vh, 5rem);
  max-width: 760px;
  animation: riseIn 0.9s ease both;
}

.hero__brand {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.4rem);
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1;
  background: linear-gradient(135deg, #ecfeff 0%, #67e8f9 45%, #22d3ee 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__title {
  margin: 0;
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hero__desc {
  margin: 1rem 0 0;
  max-width: 34rem;
  color: var(--subtext);
  font-size: 1rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.65rem 1.15rem;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

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

.btn--primary {
  color: #042f2e;
  background: linear-gradient(135deg, #67e8f9 0%, #22d3ee 45%, #0891b2 100%);
  box-shadow: 0 8px 28px rgb(34 211 238 / 25%);
}

.btn--ghost {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgb(255 255 255 / 4%);
}

.section {
  padding: clamp(3.5rem, 8vh, 5.5rem) clamp(1.25rem, 5vw, 3rem);
  max-width: 1120px;
  margin: 0 auto;
}

.section--soft {
  max-width: none;
  background: linear-gradient(180deg, rgb(34 211 238 / 4%), transparent);
  border-block: 1px solid var(--border);
}

.section--soft > * {
  max-width: 1120px;
  margin-inline: auto;
}

.section__head {
  margin-bottom: 2rem;
}

.section__head h2,
.about h2,
.section--cta h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: 0.03em;
}

.section__head p,
.section--cta p {
  margin: 0.65rem 0 0;
  color: var(--subtext);
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.capability {
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--surface);
  backdrop-filter: blur(12px);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.capability:hover {
  border-color: rgb(34 211 238 / 35%);
  transform: translateY(-2px);
}

.capability h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.capability p {
  margin: 0;
  color: var(--subtext);
  font-size: 0.95rem;
}

.scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.scene-list li {
  display: grid;
  gap: 0.35rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}

.scene-list strong {
  font-size: 1.05rem;
}

.scene-list span {
  color: var(--subtext);
}

.about {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 2rem;
  align-items: start;
}

.about p {
  margin: 1rem 0 0;
  color: var(--subtext);
}

.about__meta {
  margin: 0;
  padding: 1.2rem 1.3rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--surface);
}

.about__meta > div + div {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
}

.about__meta dt {
  color: var(--subtext);
  font-size: 0.82rem;
}

.about__meta dd {
  margin: 0.25rem 0 0;
  font-weight: 600;
}

.section--cta {
  text-align: center;
}

.section--cta .btn {
  margin-top: 1.4rem;
}

.footer {
  padding: 2rem clamp(1.25rem, 5vw, 3rem) 2.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--subtext);
  font-size: 0.88rem;
}

.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  color: var(--text);
  font-family: var(--font-display);
  letter-spacing: 0.08em;
}

.footer__brand img {
  border-radius: 6px;
}

.footer p {
  margin: 0.35rem 0 0;
}

.footer__icp a {
  color: var(--subtext);
}

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

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroDrift {
  from {
    transform: scale(1.02) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.06) translate3d(-1.2%, -0.8%, 0);
  }
}

@media (max-width: 860px) {
  .topbar__nav {
    display: none;
  }

  .capability-list,
  .about {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 92vh;
  }
}