* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

body {
  background: #fff;
  color: #333;
  line-height: 1.7;
}

.container {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  width: 240px;
  background: #f7f7f7;
  border-right: 1px solid #ddd;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.logo {
  padding: 18px;
  border-bottom: 1px solid #ddd;
}

.logo h3 {
  color: #2563eb;
}

.nav-list {
  list-style: none;
  padding: 10px 0;
}

.nav-list button {
  width: 100%;
  padding: 12px 20px;
  border: none;
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-size: 14px;
}

.nav-list button:hover {
  background: #eee;
}

.nav-list button.active {
  background: #2563eb;
  color: #fff;
}

/* 主体 */
.main-content {
  flex: 1;
  margin-left: 240px;
  padding: 20px;
}

#content {
  padding: 20px;
  min-height: 80vh;
}

/* 手机端 */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.show {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    padding: 12px;
  }
  .menu-toggle {
    position: fixed;
    top: 12px;
    left: 12px;
    width: 44px;
    height: 44px;
    border: 1px solid #ddd;
    background: #fff;
    z-index: 99;
  }
}

.menu-toggle {
  display: none;
}

/* MD 基础样式 */
#content img {
  max-width: 100%;
}
#content pre {
  margin: 1em 0;
}
#content table {
  width: 100%;
  border-collapse: collapse;
}
#content th, #content td {
  border: 1px solid #ddd;
  padding: 6px 10px;
}