/* ==========================================================================
   手风琴组件 (Accordion)
   ========================================================================== */

.zuoekai-accordion {
  border-radius: var(--zuoekai-radius-md);
  overflow: hidden;
  border: 1px solid var(--zuoekai-color-border);
}

/* 每一项 (Item) */
.zuoekai-accordion__item {
  border-bottom: 1px solid var(--zuoekai-color-border);
}

.zuoekai-accordion__item:last-child {
  border-bottom: none;
}

/* 标题栏 (Header/Trigger) */
.zuoekai-accordion__header {
  margin: 0;
}

.zuoekai-accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 20px;
  background-color: var(--zuoekai-color-surface-panel);
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 14px;
  font-weight: 500;
  color: var(--zuoekai-color-text);
  transition: background-color 0.2s;
}

.zuoekai-accordion__trigger:hover {
  background-color: var(--zuoekai-color-surface-hover);
}

.zuoekai-accordion__trigger:focus {
  outline: 2px solid var(--zuoekai-color-brand-200);
  outline-offset: -2px;
}

/* 图标 (Icon) */
.zuoekai-accordion__icon {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
  color: var(--zuoekai-color-text-muted);
}

/* 展开状态下的图标旋转 */
.zuoekai-accordion__item--active .zuoekai-accordion__icon {
  transform: rotate(180deg);
}

/* 内容区域 (Content) */
.zuoekai-accordion__content {
  display: none; /* 默认隐藏 */
  padding: 16px 20px;
  background-color: var(--zuoekai-color-surface-page);
  color: var(--zuoekai-color-text-secondary);
  line-height: 1.6;
  font-size: 14px;
  border-top: 1px solid var(--zuoekai-color-border);
}

/* 展开状态 */
.zuoekai-accordion__item--active .zuoekai-accordion__content {
  display: block;
  animation: zuoekai-slide-down 0.2s ease-out;
}

@keyframes zuoekai-slide-down {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- 变体 (Variants) --- */

/* 无边框 (Flush) */
.zuoekai-accordion--flush {
  border: none;
  border-radius: 0;
}

.zuoekai-accordion--flush .zuoekai-accordion__item {
  border-bottom: 1px solid var(--zuoekai-color-border);
}

.zuoekai-accordion--flush .zuoekai-accordion__trigger {
  background-color: transparent;
  padding-left: 0;
  padding-right: 0;
}

.zuoekai-accordion--flush .zuoekai-accordion__content {
  background-color: transparent;
  padding-left: 0;
  padding-right: 0;
  border-top: none;
}