:root {
  color-scheme: light;
  --ink: #142020;
  --muted: #5c6b68;
  --line: #d9e0dd;
  --paper: #f7f9f7;
  --panel: #ffffff;
  --teal: #0f8b8d;
  --teal-dark: #075e62;
  --coral: #e86f51;
  --gold: #d49b2a;
  --shadow: 0 22px 60px rgba(20, 32, 32, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

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, 4vw, 64px);
  border-bottom: 1px solid rgba(217, 224, 221, 0.78);
  background: rgba(247, 249, 247, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 28px);
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
}

.nav a:hover {
  color: var(--teal-dark);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  align-items: center;
  min-height: calc(100vh - 72px);
  gap: clamp(28px, 5vw, 70px);
  padding: clamp(42px, 7vw, 96px) clamp(20px, 4vw, 64px) clamp(36px, 6vw, 72px);
}

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

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--teal-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 12em;
  margin: 0;
  font-size: clamp(42px, 6vw, 82px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 3.2vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin: 18px 0 10px;
  font-size: 22px;
  letter-spacing: 0;
}

.lede {
  max-width: 620px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.7vw, 21px);
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  background: var(--teal-dark);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(7, 94, 98, 0.22);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
}

.hero-media {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 11;
  background: #dfe9e7;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section {
  padding: clamp(56px, 8vw, 104px) clamp(20px, 4vw, 64px);
}

.intro,
.contact {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(280px, 1fr);
  gap: clamp(24px, 5vw, 80px);
  align-items: start;
  background: var(--panel);
  border-block: 1px solid var(--line);
}

.intro p:last-child,
.contact p:last-child {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.72;
}

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

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

.topic-card {
  min-height: 260px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.topic-icon {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 8px;
  background: rgba(15, 139, 141, 0.12);
  color: var(--teal-dark);
  font-weight: 900;
}

.topic-card p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.68;
}

.publish {
  background: #eef4f2;
}

.steps {
  display: grid;
  gap: 12px;
  max-width: 900px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.steps li {
  counter-increment: steps;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.steps li::before {
  content: counter(steps);
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 8px;
  background: var(--coral);
  color: #ffffff;
  font-weight: 900;
}

.steps strong {
  display: block;
  margin-bottom: 7px;
  font-size: 18px;
}

.steps span {
  display: block;
  color: var(--muted);
  line-height: 1.65;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(20px, 4vw, 64px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-weight: 650;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-block: 16px;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-media {
    order: -1;
  }

  .intro,
  .contact,
  .topic-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .nav {
    gap: 10px;
    font-size: 14px;
  }

  h1 {
    font-size: 39px;
  }

  .button {
    width: 100%;
  }

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