:root {
  --bg: #07111f;
  --bg-soft: #0f1e35;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-strong: rgba(255, 255, 255, 0.12);
  --line: rgba(255, 255, 255, 0.12);
  --text: #e7edf8;
  --text-soft: #98a7c2;
  --heading: #f7faff;
  --brand: #4f8cff;
  --brand-deep: #1d4ed8;
  --accent: #7dd3fc;
  --warm: #ffb86b;
  --light-bg: #f5f8fc;
  --light-bg-alt: #edf3fb;
  --light-card: #ffffff;
  --dark-text: #102038;
  --dark-text-soft: #607089;
  --shadow: 0 22px 70px rgba(8, 19, 37, 0.2);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(79, 140, 255, 0.22), transparent 26%),
    radial-gradient(circle at top right, rgba(125, 211, 252, 0.12), transparent 18%),
    linear-gradient(180deg, #07111f 0%, #081a2f 38%, #0a1830 100%);
}

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

button {
  font: inherit;
}

.container {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(7, 17, 31, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  flex: 1 1 auto;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #fff;
  font-weight: 800;
  box-shadow: 0 14px 36px rgba(79, 140, 255, 0.35);
}

.brand-text {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-text strong {
  color: var(--heading);
  font-size: 1rem;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.brand-text small {
  color: var(--text-soft);
  font-size: 0.8rem;
  overflow-wrap: anywhere;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a {
  color: var(--text-soft);
  font-size: 0.96rem;
  transition: color 0.2s ease;
}

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

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 999px;
}

.hero-section {
  padding: 88px 0 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(125, 211, 252, 0.1);
  border: 1px solid rgba(125, 211, 252, 0.16);
  color: var(--accent);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
}

.hero-copy h1 {
  margin: 24px 0 18px;
  color: var(--heading);
  font-size: clamp(2.5rem, 4vw, 4.7rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero-text {
  max-width: 760px;
  color: var(--text-soft);
  font-size: 1.05rem;
  line-height: 1.9;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--brand), #639cff);
  color: #fff;
  box-shadow: 0 18px 40px rgba(41, 97, 255, 0.28);
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
  color: var(--heading);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: transparent;
  color: var(--text-soft);
}

.btn-ghost:hover {
  color: var(--heading);
  border-color: rgba(255, 255, 255, 0.24);
}

.btn-block {
  width: 100%;
}

.hero-points {
  display: grid;
  gap: 12px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  position: relative;
  padding-left: 28px;
  color: var(--text-soft);
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--brand));
  box-shadow: 0 0 0 6px rgba(125, 211, 252, 0.08);
}

.hero-panel-card {
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.04)),
    rgba(10, 24, 48, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 28px;
  box-shadow: 0 34px 80px rgba(6, 14, 27, 0.45);
}

.glow-card {
  position: relative;
  overflow: hidden;
}

.glow-card::after {
  content: "";
  position: absolute;
  inset: -40% auto auto 50%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(79, 140, 255, 0.34), transparent 68%);
  transform: translateX(-50%);
  pointer-events: none;
}

.panel-header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 26px;
}

.panel-tag,
.panel-status {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 0.82rem;
}

.panel-tag {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-soft);
}

.panel-status {
  background: rgba(255, 184, 107, 0.14);
  color: var(--warm);
}

.metrics-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.metrics-grid article {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.metrics-grid strong {
  display: block;
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
}

.metrics-grid span {
  color: var(--text-soft);
  font-size: 0.92rem;
}

.platform-stack {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.platform-stack div {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
}

.platform-stack span {
  display: block;
  color: var(--text-soft);
  font-size: 0.86rem;
  margin-bottom: 6px;
}

.platform-stack strong {
  color: #fff;
  font-size: 0.98rem;
  overflow-wrap: anywhere;
}

.content-section {
  padding: 84px 0;
}

.section-light {
  color: var(--dark-text);
  background: linear-gradient(180deg, rgba(245, 248, 252, 0.98), rgba(240, 245, 252, 0.98));
}

.section-light-alt {
  color: var(--dark-text);
  background: linear-gradient(180deg, rgba(237, 243, 251, 0.98), rgba(245, 248, 252, 0.98));
}

.section-dark {
  background: linear-gradient(180deg, rgba(8, 21, 39, 0.84), rgba(9, 22, 39, 0.94));
}

.section-contact {
  background: linear-gradient(180deg, rgba(13, 28, 52, 0.96), rgba(8, 18, 32, 1));
}

.section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

.section-heading h2 {
  margin: 18px 0 14px;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 0;
  color: var(--dark-text-soft);
  line-height: 1.9;
}

.section-heading-dark h2 {
  color: var(--heading);
}

.section-heading-dark p {
  color: var(--text-soft);
}

.compact-heading {
  margin-bottom: 0;
}

.feature-grid,
.download-grid {
  display: grid;
  gap: 20px;
}

.feature-card,
.scene-card,
.contact-card,
.download-card {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

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

.feature-card {
  padding: 26px;
  background: var(--light-card);
  border: 1px solid rgba(16, 32, 56, 0.06);
}

.feature-card h3 {
  margin: 0 0 12px;
  font-size: 1.08rem;
}

.feature-card p {
  margin: 0;
  color: var(--dark-text-soft);
  line-height: 1.8;
}

.downloads-layout {
  display: grid;
  gap: 30px;
}

.download-note {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: rgba(79, 140, 255, 0.08);
  border: 1px solid rgba(79, 140, 255, 0.12);
}

.download-note strong {
  color: var(--dark-text);
}

.download-note span {
  color: var(--dark-text-soft);
  line-height: 1.8;
}

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

.download-card {
  padding: 26px;
  background: #fff;
  border: 1px solid rgba(16, 32, 56, 0.06);
}

.featured-download {
  background: linear-gradient(180deg, rgba(79, 140, 255, 0.08), rgba(255, 255, 255, 1));
}

.download-tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(79, 140, 255, 0.12);
  color: var(--brand-deep);
  font-size: 0.78rem;
  font-weight: 800;
}

.muted-tag {
  background: rgba(16, 32, 56, 0.08);
  color: var(--dark-text-soft);
}

.download-card h3 {
  margin: 16px 0 12px;
  color: var(--dark-text);
}

.release-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.release-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
}

.release-badge-waiting {
  background: rgba(255, 184, 107, 0.16);
  color: #9a5a00;
}

.release-badge-planning {
  background: rgba(16, 32, 56, 0.08);
  color: var(--dark-text-soft);
}

.release-status {
  margin: 18px 0 16px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(16, 32, 56, 0.04);
}

.release-status span {
  display: block;
  color: var(--dark-text-soft);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.release-status strong {
  color: var(--dark-text);
}

.download-card p,
.download-card li {
  color: var(--dark-text-soft);
  line-height: 1.8;
}

.download-card ul {
  margin: 16px 0 0;
  padding-left: 20px;
}

.download-meta {
  margin: 18px 0 18px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(79, 140, 255, 0.08);
}

.download-meta span {
  display: block;
  color: var(--dark-text-soft);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.download-meta strong {
  color: var(--dark-text);
}

.scenes-layout {
  display: grid;
  gap: 20px;
}

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

.scene-card {
  padding: 26px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.scene-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.scene-topline h3 {
  margin: 0;
  font-size: 1.08rem;
  color: #fff;
}

.device-chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(79, 140, 255, 0.1);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
}

.scene-card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.8;
}

.contact-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: 28px;
  align-items: center;
}

.single-contact {
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.85fr);
}

.contact-copy {
  max-width: 760px;
}

.contact-shell h2 {
  margin: 18px 0 14px;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.18;
  color: #fff;
}

.contact-shell p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.9;
}

.contact-card {
  padding: 28px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-card h3 {
  margin: 0 0 16px;
  color: #fff;
}

.contact-info {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
}

.contact-info div {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
}

.contact-info span {
  display: block;
  color: var(--text-soft);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.contact-info strong {
  color: #fff;
  font-size: 0.98rem;
  overflow-wrap: anywhere;
}

.contact-info small {
  display: block;
  margin-top: 6px;
  color: rgba(231, 237, 248, 0.62);
  line-height: 1.7;
}

.contact-actions {
  display: grid;
  gap: 12px;
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(6, 14, 27, 0.7);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 28px 0;
}

.footer-inner strong {
  color: #fff;
}

.footer-inner p,
.footer-meta {
  margin: 8px 0 0;
  color: var(--text-soft);
}

.footer-meta {
  display: grid;
  justify-items: end;
  gap: 8px;
}

@media (max-width: 1080px) {
  .hero-grid,
  .contact-shell {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 960px) {
  .topbar-inner {
    min-height: 70px;
  }

  .menu-toggle {
    display: inline-flex;
    flex: 0 0 auto;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 14px;
    right: 14px;
    display: none;
    padding: 16px;
    border-radius: 18px;
    background: rgba(7, 17, 31, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.08);
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

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

@media (max-width: 780px) {
  .container {
    width: min(var(--max-width), calc(100% - 28px));
  }

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

  .hero-copy h1 {
    margin-top: 20px;
    font-size: clamp(2.1rem, 10vw, 3rem);
  }

  .metrics-grid,
  .feature-grid,
  .download-grid,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-meta {
    justify-items: start;
  }
}

@media (max-width: 560px) {
  .brand {
    gap: 10px;
  }

  .brand-text small {
    display: none;
  }

  .hero-panel-card,
  .feature-card,
  .scene-card,
  .download-card,
  .contact-card {
    padding: 22px;
  }
}