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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  min-height: 100vh;
  color: #2d3436;
  line-height: 1.7;
  padding: 2rem;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  padding: 3rem;
  backdrop-filter: blur(10px);
}

h1 {
  font-size: 2.8em;
  text-align: center;
  color: #2d3436;
  margin-bottom: 2rem;
  font-weight: 300;
  position: relative;
  padding-bottom: 1rem;
}

h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
  border-radius: 2px;
}

h2 {
  font-size: 1.5em;
  color: #2d3436;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 600;
  border-left: 4px solid #74b9ff;
  padding-left: 1rem;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

p {
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-size: 1.1em;
  color: #636e72;
  text-align: justify;
  padding: 0.5rem 0;
}

li {
  line-height: 1.8;
  margin-bottom: 0.8rem;
  margin-left: 1.5rem;
  color: #636e72;
  font-size: 1.05em;
}

ul, ol {
  margin-bottom: 1.5rem;
}

a {
  color: #0984e3;
  text-decoration: none;
  transition: all 0.3s ease;
  border-bottom: 1px solid transparent;
}

a:hover {
  color: #74b9ff;
  border-bottom: 1px solid #74b9ff;
}

/* 为段落添加交替背景色 */
p:nth-child(even) {
  background: rgba(116, 185, 255, 0.05);
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
}

/* 移动端优化 */
@media only screen and (max-width: 768px) {
  body {
    padding: 1rem;
  }

  .container {
    padding: 2rem;
  }

  h1 {
    font-size: 2.2em;
    margin-bottom: 1.5rem;
  }

  h2 {
    font-size: 1.3em;
    margin-top: 2rem;
    padding: 0.8rem;
  }

  p {
    font-size: 1em;
    text-align: left;
  }

  li {
    font-size: 1em;
    margin-left: 1rem;
  }
}

@media only screen and (max-width: 480px) {
  body {
    padding: 0.5rem;
  }

  .container {
    padding: 1.5rem;
  }

  h1 {
    font-size: 1.8em;
  }

  h2 {
    font-size: 1.2em;
    padding: 0.6rem;
  }

  p, li {
    font-size: 0.95em;
  }
}