/* 文档页通用样式 - 臻手工作台文档中心 */

body {
  font-family: "Microsoft YaHei", "SimSun", Arial, sans-serif;
  line-height: 1.8;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  color: #333;
}

h1 {
  text-align: center;
  font-size: 24px;
  margin-bottom: 20px;
  color: #000;
}

h2 {
  font-size: 20px;
  margin-top: 30px;
  margin-bottom: 15px;
  color: #000;
  border-bottom: 2px solid #eee;
  padding-bottom: 5px;
}

h3 {
  font-size: 18px;
  margin-top: 20px;
  margin-bottom: 10px;
  color: #333;
}

h4 {
  font-size: 16px;
  margin-top: 15px;
  margin-bottom: 8px;
  color: #333;
}

p {
  margin-bottom: 12px;
  text-indent: 2em;
}

.date-info {
  text-align: center;
  margin-bottom: 30px;
  color: #666;
}

.date-info p {
  text-indent: 0;
  margin-bottom: 5px;
}

ol, ul {
  margin-left: 2em;
  margin-bottom: 15px;
}

li {
  margin-bottom: 8px;
}

strong {
  font-weight: bold;
  color: #000;
}

.section {
  margin-bottom: 25px;
}

.subsection {
  margin-bottom: 20px;
}

.subject-info {
  background-color: #f9f9f9;
  border: 1px solid #e0e0e0;
  border-radius: 5px;
  padding: 20px;
  margin-bottom: 30px;
}

.subject-info h2 {
  font-size: 18px;
  margin-top: 0;
  margin-bottom: 15px;
  color: #000;
  border-bottom: none;
  padding-bottom: 0;
}

.subject-info p {
  text-indent: 0;
  margin-bottom: 8px;
  line-height: 1.6;
}

.intro {
  margin-bottom: 20px;
  font-weight: bold;
}

.intro p {
  text-indent: 0;
}

.note {
  font-size: 14px;
  color: #666;
  font-style: italic;
  margin-top: 8px;
}

/* 返回按钮 - Liquid Glass 风格 */
.back-btn {
  position: fixed;
  top: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  color: #000;
  font-size: 20px;
  font-weight: bold;
  text-decoration: none;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  z-index: 1000;
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.back-btn-icon {
  width: 20px;
  height: 20px;
  display: block;
}