* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: #15202b;
  background: #f7f8fb;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 6vw, 84px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid #e5e9f0;
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 800;
  font-size: 20px;
}

nav {
  display: flex;
  gap: 22px;
  align-items: center;
  font-size: 14px;
  color: #4d5b6c;
}

.console-link,
.primary,
.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 6px;
  font-weight: 700;
}

.console-link,
.primary {
  color: #fff;
  background: #156c61;
}

.secondary {
  color: #156c61;
  border: 1px solid #9dc8c0;
  background: #fff;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: clamp(28px, 5vw, 72px);
  min-height: 620px;
  align-items: center;
  padding: clamp(56px, 9vw, 110px) clamp(20px, 6vw, 84px) 72px;
  background:
    linear-gradient(135deg, rgba(21, 108, 97, 0.95), rgba(21, 32, 43, 0.92)),
    url("https://images.unsplash.com/photo-1551434678-e076c223a692?auto=format&fit=crop&w=1800&q=80");
  background-size: cover;
  background-position: center;
  color: #fff;
}

.eyebrow {
  margin: 0 0 16px;
  color: #aee8dd;
  font-weight: 800;
}

h1 {
  margin: 0;
  font-size: clamp(48px, 8vw, 86px);
  line-height: 1.02;
  letter-spacing: 0;
}

.lead {
  max-width: 720px;
  margin: 24px 0 0;
  font-size: 20px;
  line-height: 1.75;
  color: #edf7f5;
}

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

.hero-panel {
  display: grid;
  gap: 14px;
}

.metric-row {
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.13);
}

.metric-row span {
  display: block;
  color: #cceee8;
  font-size: 14px;
}

.metric-row strong {
  display: block;
  margin-top: 8px;
  font-size: 22px;
}

.section {
  padding: 74px clamp(20px, 6vw, 84px);
}

.section h2 {
  margin: 0 0 28px;
  font-size: 34px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

article,
.download-list a {
  padding: 24px;
  border: 1px solid #e1e7ef;
  border-radius: 8px;
  background: #fff;
}

article h3 {
  margin: 0 0 10px;
}

article p {
  margin: 0;
  color: #566475;
  line-height: 1.7;
}

.band {
  background: #eef5f3;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.steps div {
  padding: 24px 0;
  border-top: 2px solid #156c61;
}

.steps span {
  color: #156c61;
  font-weight: 900;
}

.steps p {
  margin: 12px 0 0;
  font-size: 18px;
}

.download-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 360px));
  gap: 18px;
}

.download-list strong,
.download-list span {
  display: block;
}

.download-list span {
  margin-top: 8px;
  color: #637083;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 6vw, 84px);
  color: #6b7787;
  border-top: 1px solid #e1e7ef;
  background: #fff;
}

@media (max-width: 920px) {
  .hero,
  .grid,
  .steps,
  .download-list {
    grid-template-columns: 1fr;
  }

  nav {
    gap: 12px;
    font-size: 13px;
  }

  .topbar,
  footer {
    flex-direction: column;
    align-items: flex-start;
  }
}