:root {
  color-scheme: light;
  --bg: #f3f6f8;
  --panel: #ffffff;
  --text: #17212b;
  --muted: #657382;
  --line: #d8e0e7;
  --accent: #176b87;
  --accent-dark: #0e5066;
  --shadow: 0 18px 44px rgba(23, 34, 45, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.page {
  width: min(980px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 42px 0;
}

.hero {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: clamp(30px, 7vw, 72px);
}

.eyebrow {
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  margin: 0 0 12px;
}

h1 {
  font-size: clamp(42px, 8vw, 76px);
  line-height: 1;
  margin: 0;
}

.summary {
  color: var(--muted);
  font-size: 20px;
  line-height: 1.65;
  max-width: 720px;
  margin: 24px 0 0;
}

.actions {
  margin-top: 34px;
}

.download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  padding: 0 22px;
  text-decoration: none;
}

.download:hover {
  background: var(--accent-dark);
}

.meta {
  color: var(--muted);
  margin: 18px 0 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.steps article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 20px;
}

.steps span {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  background: #e8f3f6;
  color: var(--accent-dark);
  font-weight: 800;
}

.steps h2 {
  font-size: 18px;
  margin: 16px 0 8px;
}

.steps p {
  color: var(--muted);
  line-height: 1.55;
  margin: 0;
}

@media (max-width: 760px) {
  .page {
    width: min(100vw - 20px, 620px);
    padding: 18px 0;
  }

  .hero {
    padding: 26px;
  }

  .summary {
    font-size: 17px;
  }

  .download {
    width: 100%;
  }

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