/* ============================================================
   banner.css - Banner轮播组件
   首页大图轮播
   ============================================================ */

.banner {
  position: relative;
  height: var(--banner-height);
  overflow: hidden;
  background-color: #000;
}

.banner__slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.banner__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}

.banner__slide.is-active {
  opacity: 1;
  pointer-events: auto;
}

.banner__slide-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner__slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(200, 16, 46, 0.7) 0%, rgba(0, 0, 0, 0.3) 60%, rgba(30, 58, 95, 0.3) 100%);
}

/* 藏青主题：Banner叠加色 */
html.theme-navy .banner__slide-overlay {
  background: linear-gradient(135deg, rgba(10, 37, 64, 0.7) 0%, rgba(0, 0, 0, 0.3) 60%, rgba(201, 169, 97, 0.25) 100%);
}

.banner__slide-content {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: #fff;
  width: 100%;
  max-width: 900px;
  padding: 0 40px;
}

.banner__slide-tag {
  display: inline-block;
  font-size: var(--font-size-sm);
  padding: 4px 16px;
  background-color: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 2px;
  backdrop-filter: blur(8px);
}

.banner__slide-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  letter-spacing: 2px;
}

.banner__slide-desc {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  opacity: 0.9;
  margin-bottom: 32px;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.3);
}

.banner__slide-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 36px;
  background-color: #fff;
  color: var(--color-primary);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.banner__slide-btn:hover {
  background-color: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(200, 16, 46, 0.4);
}

/* 藏青主题：Banner按钮为金底深字 */
html.theme-navy .banner__slide-btn {
  background-color: var(--color-secondary);
  color: var(--color-primary-dark);
}

html.theme-navy .banner__slide-btn:hover {
  background-color: var(--color-secondary-dark);
  color: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(201, 169, 97, 0.5);
}

/* 左右箭头 */
.banner__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background-color: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
  transition: all var(--transition-base);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.banner__arrow:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.banner__arrow--prev {
  left: 40px;
}

.banner__arrow--next {
  right: 40px;
}

/* 指示器 */
.banner__indicators {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.banner__indicator {
  width: 30px;
  height: 4px;
  background-color: rgba(255, 255, 255, 0.4);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.banner__indicator.is-active {
  background-color: #fff;
  width: 50px;
}

/* 藏青主题：Banner指示器激活色为金色 */
html.theme-navy .banner__indicator.is-active {
  background-color: var(--color-secondary);
}

/* 动画 */
.banner__slide.is-active .banner__slide-content {
  animation: bannerFadeUp 1s ease 0.3s both;
}

@keyframes bannerFadeUp {
  from {
    opacity: 0;
    transform: translate(-50%, calc(-50% + 30px));
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}