:root {
  color-scheme: light;
  --page-bg: #f3f6fb;
  --page-bg-deep: #dbe7fb;
  --surface: rgba(255, 255, 255, 0.94);
  --surface-strong: #ffffff;
  --surface-dark: #153f86;
  --text-strong: #1f2a37;
  --text-body: #4f6479;
  --text-muted: #8191a6;
  --line-soft: rgba(15, 39, 70, 0.08);
  --line-strong: rgba(15, 39, 70, 0.14);
  --accent: #1f6feb;
  --accent-deep: #1958b8;
  --accent-soft: rgba(31, 111, 235, 0.08);
  --sea: #14b8a6;
  --shadow-float: 0 18px 50px rgba(19, 47, 89, 0.12);
  --shadow-card: 0 18px 50px rgba(19, 47, 89, 0.08);
  --shadow-soft: 0 10px 30px rgba(19, 47, 89, 0.06);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --font-display: "Space Grotesk", "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-body: "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

section[id],
main[id] {
  scroll-margin-top: 108px;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text-strong);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top right, rgba(31, 111, 235, 0.14), transparent 28%),
    radial-gradient(circle at bottom left, rgba(20, 184, 166, 0.1), transparent 24%),
    linear-gradient(180deg, var(--page-bg) 0%, #f7f9fd 54%, #fbfcff 100%);
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.65), transparent);
  content: "";
}

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

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

.page-shell {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 24px 40px;
}

.site-header {
  position: sticky;
  top: 16px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
  padding: 14px 18px;
  border: 1px solid rgba(15, 39, 70, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-soft);
  transition:
    transform 220ms ease,
    box-shadow 220ms ease,
    background 220ms ease;
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-card);
  background: rgba(255, 255, 255, 0.92);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  color: #f8fbff;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  background:
    linear-gradient(135deg, var(--accent) 0%, #5b9dff 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.32);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-copy strong {
  font-size: 0.98rem;
  line-height: 1.2;
}

.brand-copy span {
  overflow: hidden;
  color: var(--text-muted);
  font-size: 0.74rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.site-nav a {
  padding: 10px 14px;
  color: var(--text-body);
  font-size: 0.94rem;
  border-radius: 999px;
  transition:
    color 180ms ease,
    background-color 180ms ease,
    transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text-strong);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

.site-nav .nav-cta {
  color: #fff9f3;
  background: var(--surface-dark);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
}

.lang-switch a {
  min-width: 54px;
  padding: 8px 12px;
  color: var(--text-body);
  font-size: 0.88rem;
  font-weight: 700;
  text-align: center;
  border-radius: 999px;
  transition:
    color 180ms ease,
    background-color 180ms ease;
}

.lang-switch a.is-active {
  color: #fff8f2;
  background: var(--surface-dark);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
  gap: 34px;
}

.hero {
  position: relative;
  padding: 34px 0 12px;
}

.hero::after {
  position: absolute;
  inset: auto 0 -6px 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(31, 111, 235, 0.18), transparent);
  content: "";
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-deep);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.split-card h2 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.04em;
}

.hero h1 {
  max-width: 10ch;
  font-size: clamp(2.7rem, 4.8vw, 4.3rem);
  line-height: 1;
}

.hero-text,
.section-heading p,
.feature-card p,
.capability-card p,
.showcase-card span,
.split-card li,
.site-footer p {
  color: var(--text-body);
  font-size: 1.02rem;
  line-height: 1.7;
}

.hero-text {
  max-width: 60ch;
  margin: 20px 0 0;
}

.hero-actions,
.start-actions,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  font-weight: 700;
  border: 1px solid transparent;
  border-radius: 999px;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  color: #f8fbff;
  background: linear-gradient(135deg, var(--accent) 0%, #1958b8 100%);
  box-shadow: 0 16px 32px rgba(31, 111, 235, 0.24);
}

.button-secondary {
  border-color: var(--line-soft);
  background: rgba(255, 255, 255, 0.92);
}

.button-ghost {
  color: var(--text-body);
  background: transparent;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.hero-tags li {
  padding: 8px 12px;
  color: var(--text-body);
  font-size: 0.9rem;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
}

.hero-visual {
  position: relative;
  max-width: 600px;
  margin-left: auto;
}

.feature-card,
.capability-card,
.showcase-card,
.split-card,
.terminal-card {
  border: 1px solid var(--line-soft);
  background: var(--surface);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-soft);
}

.hero-shot-card {
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-float);
}

.hero-shot-bar {
  display: flex;
  gap: 8px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(31, 111, 235, 0.08), rgba(255, 255, 255, 0.88));
}

.hero-shot-bar span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(15, 39, 70, 0.16);
}

.hero-shot-bar span:nth-child(1) {
  background: var(--accent);
}

.hero-shot-bar span:nth-child(2) {
  background: var(--sea);
}

.hero-shot-bar span:nth-child(3) {
  background: #c17710;
}

.hero-shot-card img,
.showcase-card img {
  height: auto;
}

.hero-shot-caption,
.showcase-card figcaption {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px 18px;
}

.hero-shot-caption strong {
  font-size: 1rem;
}

.hero-shot-caption span {
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.6;
}

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

.tinted-section {
  margin-top: 76px;
  padding: 74px 28px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 38px;
  background:
    radial-gradient(circle at top right, rgba(31, 111, 235, 0.12), transparent 35%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(247, 250, 255, 0.8));
  box-shadow: var(--shadow-card);
}

.section-heading {
  max-width: 780px;
}

.section-heading h2,
.split-card h2 {
  font-size: clamp(2.1rem, 4vw, 3.4rem);
  line-height: 1.02;
}

.section-heading p {
  margin: 16px 0 0;
}

.feature-grid,
.capability-grid,
.showcase-grid {
  gap: 18px;
  margin-top: 32px;
}

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

.feature-card,
.capability-card,
.showcase-card,
.split-card {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.feature-card h3,
.capability-card h3,
.showcase-card strong,
.split-card h2,
.terminal-card code {
  color: var(--text-strong);
}

.feature-card h3,
.capability-card h3 {
  margin: 0 0 10px;
  font-size: 1.24rem;
  line-height: 1.3;
}

.feature-card p,
.capability-card p {
  margin: 0;
}

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

.capability-card {
  min-height: 214px;
}

.capability-card span {
  display: inline-flex;
  margin-bottom: 24px;
  padding: 7px 10px;
  color: var(--accent-deep);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 999px;
  background: var(--accent-soft);
}

.showcase-grid {
  display: flex;
  gap: 24px;
  margin-top: 36px;
  padding: 4px 2px 16px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scroll-padding-left: 2px;
  scrollbar-width: thin;
  scrollbar-color: rgba(31, 111, 235, 0.26) transparent;
}

.showcase-grid::-webkit-scrollbar {
  height: 10px;
}

.showcase-grid::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(31, 111, 235, 0.24);
}

.showcase-card {
  flex: 0 0 clamp(420px, 48vw, 620px);
  overflow: hidden;
  padding: 0;
  scroll-snap-align: start;
}

.showcase-media {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  padding: 18px;
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(243, 247, 253, 0.92)),
    radial-gradient(circle at top right, rgba(31, 111, 235, 0.08), transparent 36%);
}

.showcase-card img {
  width: auto;
  max-width: 100%;
  max-height: 100%;
  height: auto;
}

.showcase-card figcaption {
  min-height: 118px;
}

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

.split-card {
  min-height: 100%;
}

.split-card-muted {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(241, 246, 255, 0.96));
}

.bullet-list,
.ordered-list {
  margin: 22px 0 0;
  padding-left: 20px;
}

.bullet-list li,
.ordered-list li {
  margin-bottom: 12px;
}

.cta-section {
  padding-bottom: 24px;
}

.start-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: 22px;
  margin-top: 34px;
}

.terminal-card {
  overflow: hidden;
  padding: 0;
  border-radius: 28px;
  background: #153f86;
}

.terminal-bar {
  display: flex;
  gap: 8px;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-bar span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 248, 242, 0.24);
}

.terminal-bar span:nth-child(1) {
  background: #ff855f;
}

.terminal-bar span:nth-child(2) {
  background: #f3c75d;
}

.terminal-bar span:nth-child(3) {
  background: #63d692;
}

.terminal-card pre {
  margin: 0;
  padding: 24px;
  overflow: auto;
  font-family: "SFMono-Regular", "JetBrains Mono", monospace;
  font-size: 0.96rem;
  line-height: 1.8;
}

.terminal-card code {
  color: #ecf3fa;
}

.start-steps {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 46px 0 12px;
}

.site-footer__main {
  flex: 1 1 420px;
}

.site-footer strong {
  font-size: 1rem;
}

.site-footer p {
  max-width: 560px;
  margin: 10px 0 0;
}

.footer-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 0 1 auto;
}

.footer-bottom {
  width: 100%;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-note {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-social,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.footer-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  color: var(--text-body);
  opacity: 0.86;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  transition:
    opacity 180ms ease,
    transform 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.footer-icon-link:hover,
.footer-icon-link:focus-visible {
  color: var(--accent-deep);
  opacity: 1;
  border-color: rgba(31, 111, 235, 0.22);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 24px rgba(31, 111, 235, 0.1);
  transform: translateY(-1px);
}

.footer-icon-link svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.footer-links a {
  color: var(--text-body);
  font-weight: 700;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 560ms ease,
    transform 560ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    animation: none !important;
    transition: none !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1120px) {
  .section-grid,
  .feature-grid,
  .capability-grid,
  .split-section,
  .start-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .page-shell {
    padding: 18px 16px 36px;
  }

  .site-header {
    position: static;
    flex-direction: column;
    align-items: stretch;
    border-radius: 26px;
  }

  .site-nav {
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .lang-switch {
    align-self: flex-start;
  }

  .site-nav a {
    flex: 1 1 auto;
    text-align: center;
  }

  .hero {
    padding-top: 6px;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2.25rem, 11vw, 3.3rem);
  }

  .hero-visual {
    max-width: none;
  }

  .showcase-card {
    flex-basis: min(88vw, 520px);
  }

  .showcase-media {
    padding: 14px;
  }

  .tinted-section {
    margin-top: 56px;
    padding: 54px 18px 0;
    border-radius: 28px;
  }

  .feature-card,
  .capability-card,
  .showcase-card,
  .split-card {
    padding: 20px;
  }

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

  .footer-actions {
    align-items: flex-start;
    width: 100%;
    justify-content: flex-start;
  }

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

  .footer-social,
  .footer-links {
    justify-content: flex-start;
  }
}