/* ========================================
   文件说明：轮播图样式
   文件路径：css/components/banner.css
   ======================================== */

.banner {
  position: relative;
  width: 100%;
  height: 480px;
  overflow: hidden;
  margin-top: var(--header-height);
}

.banner__slides {
  display: flex;
  height: 100%;
  transition: transform 0.6s ease;
}

.banner__slide {
  min-width: 100%;
  height: 100%;
  position: relative;
}

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

.banner__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.05) 30%, rgba(0,0,0,0.05) 60%, rgba(0,0,0,0.45) 100%),
    radial-gradient(ellipse at center, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.35) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: var(--color-text-white);
  padding: var(--spacing-xl);
}

.banner__title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: #fff;
  text-shadow:
    0 1px 3px rgba(0,0,0,0.6),
    0 2px 8px rgba(0,0,0,0.4),
    0 0 20px rgba(0,0,0,0.2);
  letter-spacing: 4px;
}

.banner__subtitle {
  font-size: var(--font-size-lg);
  color: #fff;
  text-shadow:
    0 1px 3px rgba(0,0,0,0.6),
    0 2px 6px rgba(0,0,0,0.3);
  letter-spacing: 2px;
  opacity: 0.95;
}

/* 指示器 */
.banner__dots {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-sm);
}

.banner__dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.banner__dot.active {
  background: var(--color-text-white);
  width: 28px;
}

/* 箭头 */
.banner__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-white);
  font-size: var(--font-size-xl);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.banner__arrow:hover {
  background: rgba(255, 255, 255, 0.5);
}

.banner__arrow--prev { left: var(--spacing-lg); }
.banner__arrow--next { right: var(--spacing-lg); }

@media (max-width: 768px) {
  .banner { height: 280px; }
  .banner__title {
    font-size: var(--font-size-2xl);
    letter-spacing: 2px;
  }
  .banner__subtitle {
    font-size: var(--font-size-base);
    letter-spacing: 1px;
  }
}