:root {
  color-scheme: dark;
  --bg: #050913;
  --bg-soft: #0b1222;
  --bg-elevated: rgba(10, 17, 32, 0.82);
  --surface: rgba(255, 255, 255, 0.05);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(144, 186, 255, 0.26);
  --text: #f5f7ff;
  --muted: #98a4c2;
  --muted-strong: #c3cee8;
  --accent: #8cb9ff;
  --accent-strong: #5d7cff;
  --accent-soft: rgba(140, 185, 255, 0.14);
  --warm: #ffe0aa;
  --success: #bfe2ff;
  --shadow: 0 40px 120px rgba(1, 6, 20, 0.56);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max-width: 1180px;
  --content-width: 880px;
  --font-display: "Avenir Next", "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at 20% 0%, rgba(132, 171, 255, 0.22), transparent 32%),
    radial-gradient(circle at 82% 12%, rgba(255, 224, 170, 0.12), transparent 22%),
    linear-gradient(180deg, #07101f 0%, #050913 48%, #04070f 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(255, 255, 255, 0.8), transparent 88%);
  opacity: 0.32;
}

body::after {
  content: "";
  position: fixed;
  inset: auto 0 0 0;
  height: 28vh;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(3, 6, 14, 0.94));
}

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

button,
a {
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

img {
  display: block;
  max-width: 100%;
}

.page-shell {
  position: relative;
  overflow: hidden;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(22px);
  background: rgba(4, 8, 17, 0.54);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

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

.brand-mark {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: radial-gradient(circle at 35% 35%, #ffffff, var(--warm) 26%, var(--accent) 58%, rgba(93, 124, 255, 0.18) 100%);
  box-shadow:
    0 0 0 8px rgba(140, 185, 255, 0.08),
    0 0 42px rgba(140, 185, 255, 0.52);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-copy strong {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.brand-copy span {
  font-size: 12px;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.nav-links a {
  position: relative;
  font-size: 14px;
  color: var(--muted);
  padding: 8px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.72), transparent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 180ms ease;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--text);
}

.nav-links a:hover::after,
.nav-links a.is-active::after {
  transform: scaleX(1);
}

.hero {
  position: relative;
  min-height: calc(100svh - 78px);
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(420px, 0.98fr);
  align-items: center;
  gap: clamp(36px, 6vw, 84px);
  padding: clamp(48px, 7vh, 88px) 0 88px;
}

.hero-copy,
.hero-stage,
.section,
.page-hero,
.page-layout,
.site-footer {
  animation: fadeUp 760ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-strong);
}

.kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--warm);
  box-shadow: 0 0 16px rgba(255, 224, 170, 0.64);
}

.hero-copy h1,
.page-hero h1,
.section-heading h2,
.cta-panel h2 {
  margin: 18px 0 0;
  font-family: var(--font-display);
  letter-spacing: -0.04em;
}

.hero-copy h1 {
  font-size: clamp(54px, 8vw, 108px);
  line-height: 0.92;
  max-width: 10ch;
}

.hero-copy p {
  max-width: 35rem;
  margin: 22px 0 0;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.8;
  color: var(--muted-strong);
}

.hero-copy .lead-note {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.lead-note span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
  color: var(--muted-strong);
}

.lead-note span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 15px;
  font-weight: 600;
}

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

.btn-primary {
  background: linear-gradient(135deg, #d9e7ff 0%, #8cb9ff 50%, #5d7cff 100%);
  color: #06101d;
  border-color: transparent;
  box-shadow: 0 16px 42px rgba(93, 124, 255, 0.36);
}

.btn-primary:hover {
  box-shadow: 0 22px 52px rgba(93, 124, 255, 0.42);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.hero-stage {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stage-scene {
  position: relative;
  width: min(560px, 88vw);
  aspect-ratio: 0.92;
  border-radius: 40px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(circle at 50% 24%, rgba(255, 255, 255, 0.12), transparent 26%),
    linear-gradient(180deg, rgba(12, 21, 38, 0.92), rgba(7, 12, 22, 0.74));
  overflow: hidden;
  box-shadow: var(--shadow);
}

.stage-scene::before,
.stage-scene::after {
  content: "";
  position: absolute;
  inset: 24px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stage-scene::after {
  inset: auto;
  left: 50%;
  bottom: -24px;
  width: 78%;
  height: 32px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(140, 185, 255, 0.34), transparent 72%);
  filter: blur(20px);
  border: 0;
}

.scene-glow {
  position: absolute;
  border-radius: 999px;
  filter: blur(8px);
  animation: drift 7.6s ease-in-out infinite;
}

.scene-glow--one {
  width: 320px;
  height: 320px;
  top: 42px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(255, 243, 219, 0.94), rgba(146, 191, 255, 0.28) 44%, transparent 72%);
}

.scene-glow--two {
  width: 240px;
  height: 240px;
  right: 12%;
  top: 24%;
  background: radial-gradient(circle, rgba(141, 185, 255, 0.42), transparent 70%);
  animation-delay: 1.4s;
}

.scene-glow--three {
  width: 200px;
  height: 200px;
  left: 8%;
  bottom: 16%;
  background: radial-gradient(circle, rgba(255, 224, 170, 0.18), transparent 72%);
  animation-delay: 2.4s;
}

.device-stack {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

.device {
  position: absolute;
  width: min(320px, 64vw);
  aspect-ratio: 0.53;
  border-radius: 40px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background:
    linear-gradient(180deg, rgba(8, 14, 24, 0.96), rgba(3, 7, 14, 0.94)),
    linear-gradient(120deg, rgba(255, 255, 255, 0.06), transparent 42%);
  overflow: hidden;
}

.device--rear {
  transform: translate(-88px, 34px) rotate(-12deg) scale(0.88);
  opacity: 0.36;
}

.device--front {
  transform: rotate(9deg);
  box-shadow: 0 26px 70px rgba(3, 6, 18, 0.72);
}

.device-camera {
  position: absolute;
  top: 18px;
  left: 50%;
  width: 94px;
  height: 10px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.device-screen {
  position: absolute;
  inset: 18px;
  border-radius: 28px;
  overflow: hidden;
  background: radial-gradient(circle at 50% 24%, rgba(255, 245, 224, 0.96), rgba(255, 238, 197, 0.78) 24%, rgba(151, 193, 255, 0.26) 52%, rgba(11, 16, 28, 0.92) 100%);
}

.device-screen::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1), transparent 22%, transparent 72%, rgba(2, 6, 12, 0.42));
}

.screen-copy {
  position: absolute;
  inset: auto 22px 24px;
  z-index: 2;
  display: grid;
  gap: 14px;
}

.screen-copy span {
  display: inline-flex;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(5, 9, 19, 0.48);
  backdrop-filter: blur(18px);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(245, 247, 255, 0.88);
}

.screen-copy h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.08;
}

.screen-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 247, 255, 0.82);
}

.screen-rails {
  display: grid;
  gap: 8px;
}

.screen-rails span {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
}

.screen-rails span:nth-child(1) {
  width: 86%;
}

.screen-rails span:nth-child(2) {
  width: 68%;
}

.screen-rails span:nth-child(3) {
  width: 48%;
}

.section {
  position: relative;
  padding: 92px 0;
}

.section + .section {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.section-heading {
  display: grid;
  gap: 18px;
  max-width: 760px;
  margin-bottom: 42px;
}

.section-eyebrow {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.section-heading h2,
.cta-panel h2,
.page-hero h1 {
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1;
}

.section-heading p,
.cta-panel p,
.page-hero p,
.article p,
.article li,
.article td,
.article th,
.support-note p,
.contact-grid p,
.footer-meta,
.footer-links a {
  color: var(--muted-strong);
  line-height: 1.9;
}

.line-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.line-item {
  display: grid;
  grid-template-columns: 82px minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 22px;
  padding: 28px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.line-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
}

.line-item h3 {
  margin: 0;
  font-size: 28px;
  font-family: var(--font-display);
  line-height: 1.08;
}

.line-item p {
  margin: 0;
  color: var(--muted-strong);
  line-height: 1.8;
}

.statement-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.statement {
  min-height: 220px;
  padding: 26px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.statement span {
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.statement h3,
.tile h3,
.faq summary,
.info-block h3,
.contact-grid h3 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.12;
}

.statement p,
.tile p,
.info-block p,
.contact-grid p {
  margin: 16px 0 0;
}

.tile-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.tile {
  min-height: 220px;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)),
    radial-gradient(circle at 100% 0%, rgba(140, 185, 255, 0.16), transparent 42%);
}

.tile .tile-link,
.inline-link,
.footer-links a,
.article a,
.contact-actions a {
  color: var(--success);
}

.tile .tile-link:hover,
.inline-link:hover,
.footer-links a:hover,
.article a:hover,
.contact-actions a:hover {
  color: #ffffff;
}

.cta-panel {
  padding: clamp(34px, 6vw, 54px);
  border-radius: 36px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(circle at 20% 0%, rgba(140, 185, 255, 0.16), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  box-shadow: var(--shadow);
}

.page-hero {
  padding: 68px 0 30px;
}

.page-hero p {
  max-width: 46rem;
  margin: 20px 0 0;
  font-size: 18px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(230px, 280px) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  padding: 16px 0 96px;
}

.page-aside {
  position: relative;
}

.info-block,
.aside-nav {
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.info-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.info-block p,
.info-block ul,
.aside-nav a {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--muted-strong);
}

.aside-nav {
  display: grid;
  gap: 14px;
}

.aside-nav a:hover {
  color: #ffffff;
}

.article {
  width: 100%;
  padding: clamp(28px, 4vw, 52px);
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.03)),
    radial-gradient(circle at 100% 0%, rgba(140, 185, 255, 0.08), transparent 32%);
  box-shadow: var(--shadow);
}

.article section + section {
  margin-top: 34px;
  padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.article h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.1;
}

.article h3 {
  margin: 18px 0 0;
  font-size: 18px;
}

.article ul,
.article ol {
  padding-left: 22px;
  margin: 0;
}

.article table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 18px;
}

.article th,
.article td {
  padding: 14px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  vertical-align: top;
  text-align: left;
}

.article th {
  color: var(--text);
  font-weight: 600;
}

.article .note,
.support-note {
  padding: 18px 20px;
  border-radius: 18px;
  border: 1px solid rgba(140, 185, 255, 0.24);
  background: rgba(140, 185, 255, 0.08);
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 18px;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  font-size: 20px;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq p,
.faq ul {
  margin: 12px 0 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 26px;
}

.contact-card {
  padding: 22px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 18px;
}

.site-footer {
  padding: 32px 0 52px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-meta {
  max-width: 640px;
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  font-size: 14px;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }

  50% {
    transform: translate3d(0, -18px, 0) scale(1.04);
  }
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 42px;
  }

  .hero-copy h1 {
    max-width: none;
  }

  .hero-stage {
    min-height: 520px;
  }

  .statement-grid,
  .tile-grid,
  .contact-grid,
  .line-item,
  .page-layout {
    grid-template-columns: 1fr;
  }

  .page-layout {
    padding-top: 0;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .header-inner {
    align-items: flex-start;
    min-height: auto;
    padding: 18px 0;
    flex-direction: column;
  }

  .nav-links {
    gap: 8px 14px;
  }

  .hero-copy h1 {
    font-size: clamp(42px, 16vw, 72px);
  }

  .section,
  .page-hero {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .article,
  .cta-panel,
  .tile {
    padding: 24px;
  }

  .hero-stage {
    min-height: 420px;
  }

  .stage-scene {
    border-radius: 28px;
  }

  .device {
    width: min(250px, 70vw);
    border-radius: 30px;
  }

  .device-screen {
    inset: 14px;
    border-radius: 22px;
  }

  .screen-copy {
    inset-inline: 16px;
    bottom: 18px;
  }

  .statement {
    min-height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}