:root {
  color-scheme: dark;
  --bg: #0e0f14;
  --panel: #181922;
  --panel-soft: #20212b;
  --ink: #f7f4f2;
  --muted: #b9b5c1;
  --subtle: #817d8d;
  --line: rgba(255, 255, 255, 0.1);
  --accent: #ff3f67;
  --accent-soft: rgba(255, 63, 103, 0.15);
  --green: #84e3bf;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 0%, rgba(255, 63, 103, 0.16), transparent 28rem),
    radial-gradient(circle at 92% 15%, rgba(132, 227, 191, 0.1), transparent 24rem),
    var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(14, 15, 20, 0.82);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

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

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(420px, 1.14fr);
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
  min-height: calc(100vh - 72px);
  padding: clamp(56px, 8vw, 108px) clamp(20px, 5vw, 72px);
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  letter-spacing: 0;
}

.hero-text,
.section-heading p,
.contact-section p {
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 32px 0 18px;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 800;
}

.primary-link {
  background: linear-gradient(135deg, #ff5877, #ff2f61);
  box-shadow: 0 18px 44px rgba(255, 47, 97, 0.26);
}

.secondary-link {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}

.notice {
  max-width: 620px;
  color: var(--subtle);
  font-size: 14px;
}

.hero-panel,
.screen-grid figure,
.info-card,
.contact-card,
.feature-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.24);
}

.hero-panel {
  overflow: hidden;
  padding: 10px;
}

.hero-panel img {
  width: 100%;
  border-radius: 6px;
}

.section,
.split-section,
.contact-section {
  padding: clamp(54px, 8vw, 96px) clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid article {
  min-height: 220px;
  padding: 26px;
}

.feature-grid span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 32px;
  margin-bottom: 24px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: #ff7791;
  font-weight: 900;
}

.feature-grid p,
.steps span,
.info-card p,
figcaption {
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
  gap: clamp(28px, 5vw, 64px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}

.steps {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.steps strong {
  color: var(--ink);
}

.info-card {
  align-self: start;
  padding: 30px;
}

.info-card::before {
  content: "";
  display: block;
  width: 48px;
  height: 4px;
  margin-bottom: 24px;
  border-radius: 999px;
  background: var(--accent);
}

.screen-section {
  background: rgba(8, 9, 13, 0.42);
}

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

.screen-grid figure {
  overflow: hidden;
  margin: 0;
}

.screen-grid img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

figcaption {
  padding: 16px 18px 18px;
  font-size: 14px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  align-items: center;
  gap: 30px;
}

.contact-card {
  display: grid;
  gap: 8px;
  padding: 28px;
}

.contact-card strong {
  font-size: 28px;
}

.contact-card span {
  color: var(--muted);
}

.contact-card a {
  margin-top: 12px;
  color: var(--green);
  font-weight: 800;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 24px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--subtle);
  font-size: 13px;
}

.site-footer a {
  color: var(--muted);
}

@media (max-width: 980px) {
  .hero,
  .split-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .site-header nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }

  .hero {
    padding-top: 42px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .primary-link,
  .secondary-link {
    width: 100%;
  }

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

  .steps li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}