/**
 * RingCarousel 组件样式
 * 
 * 使用说明：
 * 1. 在容器元素上添加此类，容器需设置明确的宽高
 * 2. 所有样式均以 .ring-carousel 为作用域，避免全局污染
 * 3. CSS 变量可通过 JS 或内联样式覆盖：
 *    --rc-card-w / --rc-card-h  卡片尺寸
 *    --rc-accent                主题色
 */

/* ========== 容器 ========== */
.ring-carousel {
  position: relative;
  overflow: hidden;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
.ring-carousel:active { cursor: grabbing; }
.ring-carousel.detail-mode { cursor: default; }
.ring-carousel.detail-mode:active { cursor: default; }

/* ========== 3D 场景 ========== */
.ring-carousel .rc-scene {
  width: 100%;
  height: 100%;
  perspective: 2000px;
  perspective-origin: 50% 45%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.ring-carousel .rc-ring {
  position: relative;
  width: 0; height: 0;
  transform-style: preserve-3d;
  will-change: transform;
}

/* ========== 卡片 ========== */
.ring-carousel .rc-card {
  position: absolute;
  width: var(--rc-card-w, 120px);
  height: var(--rc-card-h, 160px);
  left: calc(var(--rc-card-w, 120px) / -2);
  top: calc(var(--rc-card-h, 160px) / -2);
  transform-style: preserve-3d;
  will-change: transform, opacity;
  cursor: pointer;
}

.ring-carousel .rc-card-inner {
  width: 100%;
  height: 100%;
  background: #f0f0f0;
  border: none;
  overflow: hidden;
  position: relative;
  transition: transform 0.35s cubic-bezier(0.23, 1, 0.32, 1),
              box-shadow 0.5s ease;
}

.ring-carousel .rc-card:hover .rc-card-inner {
  transform: translateY(-40px);
}

.ring-carousel .rc-card-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  transition: opacity 0.5s ease;
}
.ring-carousel .rc-card-inner img.loaded { opacity: 1; }

/* 角标样式 - 格式"01 02 03"，字号10px */
.ring-carousel .cw-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  font-size: 10px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  color: rgba(255, 255, 255, 0.8);
  background: rgba(0, 0, 0, 0.4);
  padding: 2px 5px;
  border-radius: 3px;
  line-height: 1;
  pointer-events: none;
  z-index: 2;
  letter-spacing: 1px;
}
.ring-carousel .cw-badge-char {
  display: inline-block;
}

.ring-carousel .rc-card-title {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 6px 8px;
  font-size: 9px;
  font-weight: 500;
  color: #333;
  background: rgba(255,255,255,0.9);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ring-carousel .rc-card:hover .rc-card-title,
.ring-carousel .rc-card.active .rc-card-title {
  opacity: 1;
  transform: translateY(0);
}

.ring-carousel .rc-card.active .rc-card-inner {
  box-shadow: 0 0 0 2px var(--rc-accent, #4a90d9);
}

/* 详情模式下，圆环中被选中的卡片隐藏 */
.ring-carousel .rc-card.detached {
  opacity: 0 !important;
  pointer-events: none !important;
}

/* ========== 当前卡片信息面板 ========== */
.ring-carousel .rc-info-panel {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  text-align: center;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.ring-carousel .rc-active-title {
  font-size: 18px;
  font-weight: 600;
  color: #222;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s, transform 0.4s;
}
.ring-carousel .rc-active-title.visible {
  opacity: 1;
  transform: translateY(0);
}

.ring-carousel .rc-active-index {
  font-size: 11px;
  color: #999;
  margin-top: 4px;
  letter-spacing: 1px;
}

/* 详情模式下隐藏信息面板 */
.ring-carousel.detail-mode .rc-info-panel {
  opacity: 0 !important;
  pointer-events: none !important;
}

/* ========== 详情遮罩 ========== */
.ring-carousel .rc-detail-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255, 255, 255, 0);
  z-index: 400;
  pointer-events: none;
  transition: background 0.5s ease;
  cursor: default;
}
.ring-carousel .rc-detail-overlay.active {
  background: #F5F5F5;
  pointer-events: all;
}

/* ========== 飞出的详情卡片 ========== */
.ring-carousel .rc-fly-card {
  position: absolute;
  z-index: 600;
  pointer-events: none;
  will-change: transform, opacity, width, height;
  opacity: 0;
  visibility: hidden;
}
.ring-carousel .rc-fly-card.active {
  pointer-events: all;
  visibility: visible;
}
.ring-carousel .rc-fly-card-inner {
  width: 100%;
  height: 100%;
  background: #F5F5F5;
  overflow: hidden;
  border: none;
  border-radius: 0;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ring-carousel .rc-fly-card-inner img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

/* ========== 详情信息面板 ========== */
.ring-carousel .rc-detail-info {
  position: absolute;
  z-index: 610;
  pointer-events: none;
  opacity: 0;
  will-change: transform, opacity;
}
.ring-carousel .rc-detail-info.active {
  pointer-events: all;
}

.ring-carousel .rc-detail-info-inner {
  max-width: 340px;
}

.ring-carousel .rc-detail-index {
  font-size: 12px;
  color: var(--rc-accent, #4a90d9);
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.ring-carousel .rc-detail-title {
  font-size: 28px;
  font-weight: 700;
  color: #1a1a2e;
  line-height: 1.3;
  margin-bottom: 16px;
}

.ring-carousel .rc-detail-desc {
  font-size: 14px;
  color: #666;
  line-height: 1.8;
  margin-bottom: 0;
}

/* ========== 底部翻页器 ========== */
.ring-carousel .rc-bottom-pager {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 620;
  display: flex;
  align-items: center;
  gap: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
.ring-carousel .rc-bottom-pager.active {
  opacity: 1;
  pointer-events: all;
}

.ring-carousel .rc-pager-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid #ddd;
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #666;
  transition: all 0.25s ease;
}
.ring-carousel .rc-pager-btn:hover {
  border-color: var(--rc-accent, #4a90d9);
  color: var(--rc-accent, #4a90d9);
  background: rgba(74,144,217,0.05);
}

.ring-carousel .rc-pager-indicator {
  font-size: 13px;
  color: #999;
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}

.ring-carousel .rc-pager-close {
  margin-left: auto;
  font-size: 12px;
  color: #bbb;
  cursor: pointer;
  padding: 8px 16px;
  border: 1px solid #eee;
  border-radius: 20px;
  background: #fff;
  transition: all 0.25s ease;
  letter-spacing: 0.5px;
}
.ring-carousel .rc-pager-close:hover {
  border-color: #999;
  color: #666;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .ring-carousel {
    --rc-card-w: 80px;
    --rc-card-h: 110px;
  }
  .ring-carousel .rc-detail-info-inner { max-width: 220px; }
  .ring-carousel .rc-detail-title { font-size: 22px; }
  .ring-carousel .rc-detail-desc { font-size: 12px; }
}