:root {
  color-scheme: light;
  --bg: #f5fbfc;
  --bg-soft: #eaf6f7;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #172023;
  --muted: #5d6a70;
  --border: rgba(23, 32, 35, 0.12);
  --accent: #197d8a;
  --accent-strong: #116b76;
  --accent-soft: #dff3ee;
  --success: #18854f;
  --warning: #8a5a00;
  --shadow: 0 24px 70px rgba(21, 72, 77, 0.14);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(61, 204, 154, 0.24), transparent 32rem),
    radial-gradient(circle at 85% 12%, rgba(25, 125, 138, 0.16), transparent 28rem),
    linear-gradient(135deg, var(--bg), #ffffff 58%, var(--bg-soft));
  color: var(--text);
  font-family: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.55;
  letter-spacing: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 650;
  font-size: 1.05rem;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.98rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: center;
  gap: 72px;
  min-height: 620px;
  padding: 46px 0 74px;
}

.hero-copy {
  max-width: 720px;
}

.hero h1,
.doc-hero h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(3.2rem, 8vw, 6.5rem);
  line-height: 0.98;
  font-weight: 760;
  letter-spacing: 0;
}

.hero p,
.doc-hero p {
  margin: 28px 0 0;
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(1.16rem, 2vw, 1.6rem);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
  color: var(--text);
  font-weight: 650;
  box-shadow: 0 6px 20px rgba(23, 32, 35, 0.08);
}

.button:hover {
  text-decoration: none;
}

.button.primary {
  border-color: transparent;
  background: var(--accent);
  color: #fff;
}

.button.primary:hover {
  background: var(--accent-strong);
  color: #fff;
}

.hero-icon {
  display: grid;
  place-items: center;
  min-height: 360px;
}

.hero-icon img {
  width: min(100%, 300px);
  height: auto;
  filter: drop-shadow(0 28px 45px rgba(23, 80, 54, 0.22));
}

.section {
  padding: 74px 0;
  border-top: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 3.2vw, 3rem);
  line-height: 1.08;
}

.section-lead {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.card {
  min-height: 190px;
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: 0 14px 42px rgba(21, 72, 77, 0.08);
  backdrop-filter: blur(18px);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.22rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.workflow {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.62);
}

.step-number {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 760;
}

.step h3 {
  margin: 0 0 4px;
  font-size: 1.18rem;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.notice {
  padding: 22px 24px;
  border: 1px solid rgba(138, 90, 0, 0.24);
  border-radius: var(--radius-md);
  background: #fff5cf;
  color: #3b2b0a;
}

.notice strong {
  color: var(--warning);
}

.doc-hero {
  padding: 54px 0 44px;
}

.doc-hero h1 {
  font-size: clamp(2.6rem, 6vw, 5rem);
}

.doc-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 56px;
  padding: 34px 0 82px;
  border-top: 1px solid var(--border);
}

.toc {
  position: sticky;
  top: 24px;
  align-self: start;
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.7);
}

.toc a {
  color: var(--muted);
  font-size: 0.96rem;
}

.doc-content {
  max-width: 820px;
}

.doc-content h2 {
  margin: 0 0 18px;
  padding-top: 12px;
  font-size: 2rem;
  line-height: 1.16;
}

.doc-content h3 {
  margin: 32px 0 8px;
  font-size: 1.24rem;
}

.doc-content p,
.doc-content li {
  color: var(--muted);
  font-size: 1.05rem;
}

.doc-content p {
  margin: 0 0 16px;
}

.doc-content ul {
  margin: 0 0 22px;
  padding-left: 24px;
}

.support-panel {
  display: grid;
  gap: 18px;
  margin-top: 32px;
}

.support-row {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.support-row h2 {
  margin: 0 0 8px;
  font-size: 1.35rem;
}

.support-row p {
  margin: 0;
  color: var(--muted);
}

.email-link {
  display: inline-flex;
  margin-top: 12px;
  font-size: 1.2rem;
  font-weight: 650;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0 42px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 860px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    flex-wrap: wrap;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 26px;
    min-height: auto;
    padding-top: 32px;
  }

  .hero-icon {
    min-height: auto;
    justify-content: start;
  }

  .hero-icon img {
    width: 190px;
  }

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

  .doc-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .toc {
    position: static;
  }
}

@media (max-width: 560px) {
  .page {
    width: min(100% - 28px, var(--max));
  }

  .hero h1,
  .doc-hero h1 {
    font-size: 3rem;
  }

  .button {
    width: 100%;
  }

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