:root {
  --bg: #f5f7f8;
  --surface: #ffffff;
  --surface-2: #edf4f3;
  --text: #1f2933;
  --muted: #60707b;
  --line: #d9e1e5;
  --brand: #0f766e;
  --brand-2: #144d53;
  --accent: #e5a823;
  --shadow: 0 18px 40px rgba(12, 39, 47, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 0 40px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  color: var(--brand-2);
  font-weight: 800;
  letter-spacing: 0;
}

nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

nav a:hover {
  color: var(--brand);
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(360px, 1.1fr);
  gap: 44px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  padding: 70px 40px 56px;
}

.hero-copy h1 {
  margin: 10px 0 18px;
  color: #122a2f;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.eyebrow {
  margin: 0;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--brand);
  border-radius: 7px;
  padding: 0 18px;
  background: var(--brand);
  color: white;
  font-weight: 700;
}

.button.secondary {
  background: white;
  color: var(--brand-2);
  border-color: var(--line);
}

.hero-media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: white;
  box-shadow: var(--shadow);
}

.hero-media img {
  display: block;
  width: 100%;
  height: auto;
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 58px 40px;
}

.band {
  max-width: none;
  background: var(--surface-2);
}

.band > * {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 24px;
}

.section-heading h2,
.contact h2 {
  margin: 8px 0 0;
  color: #122a2f;
  font-size: 30px;
  line-height: 1.25;
  letter-spacing: 0;
}

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

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

article,
.contact-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: var(--surface);
}

article h3 {
  margin: 0 0 8px;
  color: var(--brand-2);
  font-size: 18px;
  letter-spacing: 0;
}

article p,
.contact p,
.contact-box p {
  margin: 0;
  color: var(--muted);
}

.steps {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 22px;
  color: #29444b;
  font-size: 17px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(300px, 1fr);
  gap: 24px;
  align-items: start;
}

.document {
  max-width: 900px;
  margin: 0 auto;
  padding: 56px 36px;
}

.document h1 {
  margin: 0 0 10px;
  color: #122a2f;
  font-size: 38px;
  letter-spacing: 0;
}

.document h2 {
  margin: 34px 0 10px;
  color: var(--brand-2);
  font-size: 22px;
  letter-spacing: 0;
}

.document p,
.document li {
  color: #40535d;
}

.document ul {
  padding-left: 22px;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 40px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: white;
}

footer p {
  margin: 0;
}

@media (max-width: 900px) {
  .site-header,
  footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 22px;
  }

  nav {
    flex-wrap: wrap;
    gap: 12px;
  }

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

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

  .hero,
  .section,
  .document {
    padding-left: 22px;
    padding-right: 22px;
  }
}