:root {
  color-scheme: dark;
  --ink: #f6f8fb;
  --muted: #aeb9ca;
  --canvas: #08111f;
  --canvas-deep: #050b14;
  --panel: rgba(18, 32, 50, 0.72);
  --line: rgba(202, 219, 240, 0.14);
  --accent: #48d7c7;
  --accent-strong: #73f0d8;
  --blue: #75a7ff;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  font-family:
    Inter, "SF Pro Display", "Segoe UI", "PingFang SC", "Microsoft YaHei",
    system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(41, 147, 160, 0.16), transparent 32rem),
    radial-gradient(circle at 88% 18%, rgba(60, 96, 183, 0.18), transparent 30rem),
    var(--canvas);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.65rem 0.9rem;
  color: #071019;
  background: var(--accent-strong);
  border-radius: 0.45rem;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(1140px, calc(100% - 3rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(8, 17, 31, 0.8);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1.02rem;
  font-weight: 750;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  place-items: center;
  color: #061019;
  background: linear-gradient(145deg, var(--accent-strong), var(--blue));
  border-radius: 0.65rem;
  font-size: 0.77rem;
  font-weight: 850;
  box-shadow: 0 8px 24px rgba(72, 215, 199, 0.18);
}

nav {
  display: flex;
  gap: 1.5rem;
}

nav a {
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 160ms ease;
}

nav a:hover,
nav a:focus-visible {
  color: var(--ink);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 7.8rem 0 7rem;
  border-bottom: 1px solid var(--line);
}

.hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(72, 215, 199, 0.5), transparent);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  align-items: center;
  gap: 5rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
  text-wrap: pretty;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(2.7rem, 5.7vw, 5rem);
  line-height: 1.12;
  letter-spacing: -0.048em;
}

.hero-lead {
  max-width: 660px;
  margin: 1.8rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 2.4rem;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.15rem;
  border-radius: 0.7rem;
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  color: #061019;
  background: var(--accent-strong);
  box-shadow: 0 12px 36px rgba(72, 215, 199, 0.17);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #a0f8e7;
}

.version-badge {
  padding: 0.5rem 0.8rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.82rem;
}

.hero-visual {
  position: relative;
  min-height: 430px;
}

.visual-orbit {
  position: absolute;
  border: 1px solid rgba(117, 167, 255, 0.2);
  border-radius: 50%;
}

.orbit-one {
  inset: 4% 2% 10% 13%;
}

.orbit-two {
  inset: 19% 16% 25% 0;
  border-color: rgba(72, 215, 199, 0.18);
}

.metric-card {
  position: absolute;
  padding: 1.25rem 1.35rem;
  background: linear-gradient(155deg, rgba(30, 51, 76, 0.92), rgba(10, 22, 37, 0.92));
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.metric-card p {
  margin: 0 0 0.25rem;
  color: var(--muted);
  font-size: 0.77rem;
}

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

.metric-card strong {
  font-size: 1.32rem;
  line-height: 1.35;
}

.metric-card span {
  margin-top: 0.7rem;
  color: #8fa4bf;
  font-size: 0.76rem;
}

.metric-primary {
  top: 16%;
  right: 4%;
  width: min(300px, 76%);
  min-height: 168px;
  padding-top: 1.7rem;
  border-color: rgba(72, 215, 199, 0.3);
}

.metric-primary::before {
  display: block;
  width: 3.2rem;
  height: 0.25rem;
  margin-bottom: 1.6rem;
  content: "";
  background: linear-gradient(90deg, var(--accent), var(--blue));
  border-radius: 99px;
}

.metric-secondary {
  bottom: 12%;
  left: 0;
  display: flex;
  width: 210px;
  align-items: center;
  gap: 0.75rem;
}

.metric-secondary .status-dot {
  width: 0.72rem;
  height: 0.72rem;
  flex: none;
  margin: 0;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(72, 215, 199, 0.12);
}

.metric-tertiary {
  right: 0;
  bottom: 0;
  width: 190px;
}

.section {
  padding: 7rem 0;
}

.section-heading {
  max-width: 740px;
  margin-bottom: 3.2rem;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.35rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.section-heading > p:last-child,
.workflow-copy > p:last-child {
  margin: 1.3rem 0 0;
  color: var(--muted);
}

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

.feature-card {
  min-height: 260px;
  padding: 2rem;
  background: linear-gradient(145deg, rgba(22, 38, 59, 0.74), rgba(9, 20, 34, 0.82));
  border: 1px solid var(--line);
  border-radius: 1rem;
}

.feature-index {
  color: var(--accent);
  font-family: "Segoe UI Mono", Consolas, monospace;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

.feature-card h3 {
  margin: 3.4rem 0 0.75rem;
  font-size: 1.36rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.workflow {
  background: rgba(4, 10, 18, 0.42);
  border-block: 1px solid var(--line);
}

.workflow-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(420px, 1.15fr);
  align-items: center;
  gap: 6rem;
}

.workflow-steps {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.workflow-steps li {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}

.workflow-steps li > span {
  display: grid;
  width: 2.4rem;
  height: 2.4rem;
  place-items: center;
  color: var(--accent-strong);
  background: rgba(72, 215, 199, 0.08);
  border: 1px solid rgba(72, 215, 199, 0.16);
  border-radius: 50%;
  font-size: 0.78rem;
}

.workflow-steps strong,
.workflow-steps small {
  display: block;
}

.workflow-steps strong {
  line-height: 1.4;
}

.workflow-steps small {
  color: var(--muted);
  font-size: 0.82rem;
}

.site-footer {
  padding: 2.1rem 0;
  background: var(--canvas-deep);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.footer-inner p {
  margin: 0;
}

.footer-inner p span {
  margin-left: 0.85rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.footer-inner a {
  color: var(--muted);
  font-size: 0.82rem;
  text-decoration: none;
}

.footer-inner a:hover,
.footer-inner a:focus-visible {
  color: var(--ink);
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 4px;
}

@media (max-width: 900px) {
  .hero {
    padding-top: 5.4rem;
  }

  .hero-grid,
  .workflow-grid {
    grid-template-columns: 1fr;
    gap: 3.6rem;
  }

  .hero-visual {
    width: min(520px, 100%);
    margin-inline: auto;
  }

  .workflow-grid {
    max-width: 740px;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 2rem, 1140px);
  }

  .header-inner {
    min-height: 64px;
  }

  nav {
    display: none;
  }

  .hero {
    padding: 4.6rem 0 4.4rem;
  }

  h1 {
    font-size: clamp(2.25rem, 11.2vw, 3.4rem);
    letter-spacing: -0.055em;
  }

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

  .hero-visual {
    min-height: 390px;
  }

  .metric-primary {
    right: 0;
  }

  .metric-secondary {
    left: 0;
  }

  .metric-tertiary {
    right: 0;
  }

  .section {
    padding: 4.8rem 0;
  }

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

  .feature-card {
    min-height: 230px;
  }

  .workflow-grid {
    gap: 2.4rem;
  }

  .footer-inner p span {
    display: block;
    margin: 0.15rem 0 0;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}