*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  color: #333;
  background-color: #f7f8fa;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px;
  background-color: #fff;
  box-sizing: border-box;
}

h1 {
  margin: 0 0 16px;
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  color: #111;
}

.date {
  margin-bottom: 28px;
  text-align: center;
  font-size: 14px;
  color: #666;
}

h2 {
  margin-top: 32px;
  margin-bottom: 12px;
  font-size: 20px;
  font-weight: 700;
  color: #222;
  border-left: 4px solid #1677ff;
  padding-left: 10px;
}

p {
  margin: 10px 0;
  font-size: 16px;
}

ol, ul {
  margin: 8px 0 16px 0;
  padding-left: 24px;
}

li {
  margin: 8px 0;
  font-size: 16px;
}

.intro {
  padding: 16px;
  background-color: #f5f7fb;
  border-radius: 8px;
  margin-bottom: 24px;
}

.contact-info {
  margin-top: 12px;
  padding: 16px;
  background-color: #f5f7fb;
  border-radius: 8px;
}

.contact-info p {
  margin: 6px 0;
}

.strong {
  font-weight: 600;
  color: #111;
}

@media (max-width: 600px) {
  .container {
    padding: 24px 16px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 18px;
  }

  p,
  li {
    font-size: 15px;
  }
}