body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  width: 280px; /* 为新布局增加了宽度 */
  padding: 0;
  margin: 0;
  color: #333;
}

#app {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px 15px;
}

header {
  margin-bottom: 15px;
}

.logo {
  width: 64px;
  height: 64px;
  margin-bottom: 10px;
}

h1 {
  font-size: 22px;
  margin: 0 0 8px 0;
}

.description {
  font-size: 14px;
  color: #666;
  margin: 0;
  max-width: 240px; /* 确保描述文本可以优雅地换行 */
}

.separator {
  width: 100%;
  border: none;
  border-top: 1px solid #eee;
  margin: 0;
}

.settings-container {
  width: 100%;
  padding: 15px 0;
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  margin-bottom: 15px;
}

.setting-row:last-child {
  margin-bottom: 0;
}

footer {
  padding-top: 10px;
  margin-top: 5px;
}

footer span {
  font-size: 13px;
}

footer a {
  color: #007bff;
  text-decoration: none;
  font-size: 13px;
  padding: 0 3px;
}

footer a:hover {
  text-decoration: underline;
}

/* --- 下拉选择框样式 --- */
.source-select {
  padding: 4px 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 14px;
  background-color: white;
  cursor: pointer;
  min-width: 100px;
}

.source-select:focus {
  outline: none;
  border-color: #007bff;
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

/* --- 开关样式 --- */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input { 
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
}

input:checked + .slider {
  background-color: #007bff;
}

input:checked + .slider:before {
  transform: translateX(20px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}