:root {
  --bg: #050812;
  --bg-2: #08111f;
  --panel: rgba(10, 18, 32, 0.78);
  --panel-2: rgba(14, 25, 44, 0.92);
  --text: #eff6ff;
  --muted: #94a8c3;
  --line: rgba(126, 165, 217, 0.18);
  --cyan: #38d5ff;
  --blue: #3f7cff;
  --violet: #7357ff;
  --green: #6cf5bd;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.48);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background:
    radial-gradient(circle at 12% 4%, rgba(56, 213, 255, 0.22), transparent 26%),
    radial-gradient(circle at 88% 0%, rgba(115, 87, 255, 0.26), transparent 30%),
    linear-gradient(180deg, #050812 0%, #08111f 42%, #050812 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.032) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.76), transparent 74%);
}

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

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

.nav-shell {
  position: sticky;
  top: 18px;
  z-index: 20;
  display: flex;
  width: min(1180px, calc(100% - 48px));
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 18px auto 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(5, 10, 19, 0.78);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.brand-mark {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(56, 213, 255, 0.46);
  border-radius: 13px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  color: #04101d;
  font-weight: 900;
  box-shadow: 0 0 30px rgba(56, 213, 255, 0.22);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
  letter-spacing: 0.04em;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.topnav a {
  padding: 9px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.topnav a:hover {
  background: rgba(56, 213, 255, 0.1);
  color: var(--text);
}

.hero-section {
  position: relative;
  overflow: hidden;
  padding: 72px 0 54px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(115deg, rgba(56, 213, 255, 0.1), transparent 42%),
    radial-gradient(circle at 70% 46%, rgba(63, 124, 255, 0.18), transparent 34%);
}

.hero-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 28px;
  align-items: stretch;
}

.hero-copy,
.command-panel,
.product-main,
.product-side article,
.focus-grid div,
.faq-grid details {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-copy {
  padding: 62px;
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(56, 213, 255, 0.08), rgba(115, 87, 255, 0.09)),
    var(--panel);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 13ch;
  margin-bottom: 24px;
  font-size: clamp(46px, 6.8vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

.lead,
.section-title p,
.product-main p,
.product-side p,
.focus-grid span,
.faq-grid p,
.footer p {
  color: var(--muted);
  line-height: 1.8;
}

.lead {
  max-width: 68ch;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 12px;
  font-weight: 900;
}

.button.primary {
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #03111f;
  box-shadow: 0 18px 42px rgba(56, 213, 255, 0.18);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
}

.button.disabled,
.button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.66;
  pointer-events: none;
}

.command-panel {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(14, 25, 44, 0.92), rgba(5, 10, 19, 0.96)),
    var(--panel-2);
}

.command-panel::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image:
    linear-gradient(rgba(56, 213, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 213, 255, 0.12) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at 50% 0%, #000, transparent 72%);
}

.panel-topline,
.command-panel h2,
.signal-board {
  position: relative;
}

.panel-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 46px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.panel-topline strong {
  color: var(--green);
}

.command-panel h2 {
  max-width: 13ch;
  margin-bottom: 36px;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.signal-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.signal-board div {
  min-height: 104px;
  padding: 16px;
  border: 1px solid rgba(126, 165, 217, 0.16);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.045);
}

.signal-board span {
  display: block;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
}

.signal-board strong {
  display: block;
  margin-top: 18px;
  font-size: 19px;
}

.section {
  padding: 76px 0 0;
}

.section-title {
  max-width: 760px;
  margin-bottom: 28px;
}

.centered {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-title h2,
.band-layout h2,
.footer h2 {
  margin-bottom: 14px;
  font-size: clamp(34px, 4.6vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.product-matrix {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  gap: 18px;
}

.product-main,
.product-side article {
  border-radius: 26px;
}

.product-main {
  min-height: 520px;
  padding: 36px;
  background:
    linear-gradient(135deg, rgba(56, 213, 255, 0.16), rgba(115, 87, 255, 0.16)),
    var(--panel-2);
}

.product-main-ppt {
  background:
    linear-gradient(135deg, rgba(56, 213, 255, 0.18), rgba(108, 245, 189, 0.1)),
    linear-gradient(180deg, rgba(14, 25, 44, 0.96), rgba(5, 10, 19, 0.94));
}

.badge {
  display: inline-flex;
  width: fit-content;
  margin-bottom: 24px;
  padding: 8px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
}

.badge.live {
  background: rgba(108, 245, 189, 0.14);
  color: var(--green);
}

.badge.plan {
  background: rgba(63, 124, 255, 0.16);
  color: #9dbbff;
}

.badge.service {
  background: rgba(56, 213, 255, 0.14);
  color: var(--cyan);
}

.product-main h3 {
  margin-bottom: 18px;
  font-size: clamp(42px, 5vw, 70px);
  line-height: 1;
}

.product-main p {
  max-width: 62ch;
  font-size: 18px;
}

.product-main ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
}

.product-main li {
  padding: 15px 16px;
  border: 1px solid rgba(126, 165, 217, 0.16);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.045);
  font-weight: 900;
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.product-side {
  display: grid;
  gap: 18px;
}

.product-side article {
  min-height: 160px;
  padding: 24px;
}

.product-side h3 {
  margin-bottom: 8px;
  font-size: 24px;
}

.band-section {
  margin-top: 86px;
  padding: 54px 0;
  border-block: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(56, 213, 255, 0.08), rgba(115, 87, 255, 0.08));
}

.band-layout {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 34px;
  align-items: center;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.focus-grid div {
  min-height: 150px;
  padding: 22px;
  border-radius: 20px;
}

.focus-grid strong,
.focus-grid span {
  display: block;
}

.focus-grid strong {
  margin-bottom: 12px;
  font-size: 22px;
}

.faq-grid {
  display: grid;
  max-width: 920px;
  gap: 12px;
  margin: 0 auto;
}

.faq-grid details {
  overflow: hidden;
  border-radius: 18px;
}

.faq-grid summary {
  cursor: pointer;
  padding: 20px 22px;
  font-size: 18px;
  font-weight: 900;
}

.faq-grid p {
  margin: 0;
  padding: 0 22px 22px;
}

.footer {
  margin-top: 84px;
  padding: 44px 0;
  border-top: 1px solid var(--line);
  background: rgba(5, 8, 18, 0.68);
}

.footer-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 34px;
}

.footer-links {
  display: grid;
  gap: 10px;
  align-content: center;
  color: var(--muted);
  font-weight: 700;
}

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

@media (max-width: 980px) {
  .nav-shell,
  .hero-layout,
  .product-matrix,
  .band-layout,
  .footer-layout {
    grid-template-columns: 1fr;
  }

  .nav-shell {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .topnav {
    justify-content: flex-start;
  }

  .hero-copy,
  .command-panel,
  .product-main {
    padding: 30px;
  }

  .focus-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container,
  .nav-shell {
    width: min(100% - 24px, 1180px);
  }

  .hero-section {
    padding-top: 34px;
  }

  .hero-copy,
  .command-panel,
  .product-main,
  .product-side article {
    border-radius: 22px;
  }

  .signal-board,
  .product-main ul {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 12ch;
  }
}

.download-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 28px;
}

.product-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 38px;
}

.ppt-hero {
  background:
    radial-gradient(circle at 72% 16%, rgba(108, 245, 189, 0.16), transparent 28%),
    linear-gradient(115deg, rgba(56, 213, 255, 0.08), transparent 48%);
}

.product-hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 28px;
  align-items: stretch;
}

.product-hero-copy,
.product-console,
.feature-panel,
.pricing-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.product-hero-copy {
  padding: 54px;
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(56, 213, 255, 0.12), rgba(108, 245, 189, 0.08)),
    var(--panel);
}

.product-hero-copy h1 {
  max-width: 9ch;
}

.product-console {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(14, 25, 44, 0.92), rgba(5, 10, 19, 0.96)),
    var(--panel-2);
}

.product-console::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(56, 213, 255, 0.16), transparent 42%),
    radial-gradient(circle at 78% 22%, rgba(108, 245, 189, 0.16), transparent 34%);
}

.metric-stack {
  position: relative;
  display: grid;
  gap: 14px;
}

.metric-stack div {
  padding: 20px;
  border: 1px solid rgba(126, 165, 217, 0.16);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.045);
}

.metric-stack span,
.metric-stack strong,
.metric-stack small {
  display: block;
}

.metric-stack span {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.metric-stack strong {
  margin-top: 12px;
  font-size: 28px;
}

.metric-stack small {
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.6;
}

.feature-panel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-panel,
.pricing-card {
  padding: 28px;
  border-radius: 24px;
}

.feature-panel h3,
.pricing-card h3 {
  margin-bottom: 12px;
  font-size: 28px;
}

.feature-panel p,
.pricing-card p {
  color: var(--muted);
  line-height: 1.75;
}

.feature-panel ul,
.pricing-card ul {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.9;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 920px;
  margin: 0 auto;
}

.pricing-card.highlight {
  background:
    linear-gradient(135deg, rgba(56, 213, 255, 0.14), rgba(108, 245, 189, 0.1)),
    var(--panel-2);
}

.download-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.72fr);
  gap: 28px;
  align-items: stretch;
}

.release-card,
.download-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.release-card {
  display: grid;
  align-content: center;
  gap: 16px;
  padding: 32px;
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(56, 213, 255, 0.14), rgba(115, 87, 255, 0.14)), var(--panel-2);
}

.release-card h2,
.download-panel h2 {
  margin-bottom: 8px;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.12;
}

.release-card small {
  color: var(--muted);
  line-height: 1.6;
}

.download-button {
  width: fit-content;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.download-panel {
  padding: 30px;
  border-radius: 24px;
}

.release-steps,
.release-list {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.9;
}

@media (max-width: 920px) {
  .download-layout,
  .download-grid,
  .product-hero-layout,
  .feature-panel-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}