* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #f7f8fb;
  color: #171717;
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.app {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 64px;
}

.hero {
  padding: 32px 0 28px;
}

.eyebrow {
  color: #2563eb;
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 12px;
}

h1 {
  font-size: 42px;
  line-height: 1.1;
  margin: 0 0 16px;
}

.summary {
  color: #5f6368;
  font-size: 17px;
  line-height: 1.7;
  margin: 0;
  max-width: 640px;
}

.panel {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  margin-top: 20px;
  padding: 24px 28px;
}

.panel strong {
  display: block;
  margin-bottom: 10px;
  line-height: 1.4;
}

.panel p {
  color: #5f6368;
  line-height: 1.7;
  margin: 0;
}

@media (max-width: 640px) {
  .app {
    width: min(100% - 24px, 920px);
    padding: 32px 0 40px;
  }

  .hero {
    padding: 20px 0 22px;
  }

  h1 {
    font-size: 34px;
  }

  .panel {
    margin-top: 16px;
    padding: 20px;
  }
}