/* ── Showcase 区域 ── */
.showcase {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: grid;
  grid-template-columns: var(--showcase-left-width) 1fr var(--showcase-right-width);
  background: var(--color-bg);
  overflow: hidden;
}

/* 顶部渐变遮罩：柔化与第一屏的衔接，仅覆盖中央视频区 */
.showcase::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--showcase-left-width);
  right: var(--showcase-right-width);
  height: 100px;
  background: linear-gradient(to bottom, #F5EDE6 0%, transparent 100%);
  z-index: 10;
  pointer-events: none;
  opacity: 1;
  transition: opacity 600ms ease;
}

/* 底部渐变遮罩：柔化与第三屏的衔接，仅覆盖中央视频区 */
.showcase::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--showcase-left-width);
  right: var(--showcase-right-width);
  height: 100px;
  background: linear-gradient(to top, #F5EDE6 0%, transparent 100%);
  z-index: 10;
  pointer-events: none;
  opacity: 1;
  transition: opacity 600ms ease;
}

.showcase--settled::before,
.showcase--settled::after {
  opacity: 0;
}

/* ── 左栏：Tab 导航 ── */
.showcase__nav {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: var(--space-lg) var(--space-sm) var(--space-lg) var(--space-md);
  background: rgba(245, 237, 230, 0.12);
  border-right: 1px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(28px) saturate(2.2);
  -webkit-backdrop-filter: blur(28px) saturate(2.2);
  box-shadow: inset -1px 0 0 rgba(255,255,255,0.4);
}

.showcase__tab {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: 8px;
  background: transparent;
  color: var(--color-text-secondary);
  font-family: var(--font-zh);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-align: left;
  border-left: 3px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  cursor: pointer;
}

.showcase__tab:hover {
  background: var(--color-accent-hover-bg);
  color: var(--color-text-primary);
}

.showcase__tab.active {
  border-left-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-active-bg);
}

.showcase__tab-icon {
  font-size: 8px;
  opacity: 0.5;
  flex-shrink: 0;
}

.showcase__tab.active .showcase__tab-icon {
  opacity: 1;
}

/* ── 背景层 ── */
.showcase__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.showcase__bg-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: opacity 0.4s ease-in-out;
}

/* ── 中央：透明占位，背景层透出 ── */
.showcase__stage {
  position: relative;
  z-index: 1;
  background: transparent;
}


/* ── 右栏：详情 ── */
.showcase__detail {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  padding: var(--space-lg) var(--space-md);
  background: rgba(255, 250, 247, 0.12);
  border-left: 1px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(28px) saturate(2.2);
  -webkit-backdrop-filter: blur(28px) saturate(2.2);
  box-shadow: inset 1px 0 0 rgba(255,255,255,0.4);
}

.showcase__detail-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.showcase__detail-title {
  font-family: var(--font-zh);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.showcase__detail-desc {
  font-family: var(--font-zh);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

/* 属性标签 */
.showcase__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.showcase__tag {
  padding: 6px 14px;
  border-radius: 50px;
  border: 1px solid var(--color-accent-light);
  background: rgba(200, 80, 106, 0.04);
  font-family: var(--font-zh);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  min-width: 88px;
  text-align: center;
}

/* 背景层切换淡入淡出 */
.showcase__bg-media.fading {
  opacity: 0;
}

/* 右栏内容淡入 */
.showcase__detail-inner {
  opacity: 1;
  transition: opacity 0.35s ease-in-out;
}

.showcase__detail-inner.fading {
  opacity: 0;
}

/* ── 热区（Hotspot）── */
.hotspot {
  position: absolute;
  transform: translate(-50%, -50%);
  z-index: 20;
}

.hotspot__dot {
  position: relative;
  width: 12px;
  height: 12px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(200, 80, 106, 0.6);
  cursor: pointer;
}

.hotspot__pulse {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: rgba(200, 80, 106, 0.35);
  animation: hotspot-pulse 2s ease-out infinite;
}

@keyframes hotspot-pulse {
  0%   { transform: scale(1);   opacity: 0.8; }
  70%  { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.2); opacity: 0; }
}

.hotspot__popover {
  position: absolute;
  top: 50%;
  background: rgba(15, 8, 6, 0.55);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border: 1px solid rgba(200, 80, 106, 0.5);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25), 0 0 12px rgba(200, 80, 106, 0.3);
  color: #fff;
  white-space: normal;
  width: 200px;
  padding: 10px 12px;
  border-radius: 8px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

/* 向上弹出 */
.hotspot__popover--up {
  top: auto;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
}

.hotspot__popover--up::before {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: rgba(15, 8, 6, 0.55);
}

.hotspot:hover .hotspot__popover--up {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 向下弹出 */
.hotspot__popover--down {
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
}

.hotspot__popover--down::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-bottom-color: rgba(15, 8, 6, 0.55);
}

.hotspot:hover .hotspot__popover--down {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 左边的点向左弹出 */
.hotspot__popover--left {
  right: calc(100% + 14px);
  transform: translateX(6px) translateY(-50%);
}

.hotspot__popover--left::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 100%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-left-color: rgba(15, 8, 6, 0.55);
}

/* 右边的点向右弹出 */
.hotspot__popover--right {
  left: calc(100% + 14px);
  transform: translateX(-6px) translateY(-50%);
}

.hotspot__popover--right::before {
  content: '';
  position: absolute;
  top: 50%;
  right: 100%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-right-color: rgba(15, 8, 6, 0.55);
}

.hotspot:hover .hotspot__popover--right {
  opacity: 1;
  transform: translateX(0) translateY(-50%);
}

.hotspot:hover .hotspot__popover--left {
  opacity: 1;
  transform: translateX(0) translateY(-50%);
}

.hotspot__title {
  font-size: 12px;
  font-weight: 600;
  color: #FFCDD8;
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.hotspot__line {
  font-size: 12px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
}

/* 亮色磨砂玻璃变体（用于深色视频背景） */
.hotspot--light .hotspot__popover {
  background: rgba(255, 250, 247, 0.72);
  border-color: rgba(200, 80, 106, 0.35);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12), 0 0 12px rgba(200, 80, 106, 0.15);
}

.hotspot--light .hotspot__popover--up::before {
  border-top-color: rgba(255, 250, 247, 0.72);
}

.hotspot--light .hotspot__title {
  color: #C8506A;
}

.hotspot--light .hotspot__line {
  color: rgba(42, 26, 20, 0.8);
}