/* products.css */

.arch-section { background: var(--off-white); border-bottom: 1px solid var(--border); }

.arch-pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.arch-pillar {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.pillar-icon { font-size: 1.3rem; color: var(--accent); margin-bottom: 0.75rem; display: block; }
.arch-pillar h3 { margin-bottom: 0.6rem; font-size: 1rem; }
.arch-pillar p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.65; }

.tms-section { background: var(--white); }
.tfus-section { background: var(--off-white); border-top: 1px solid var(--border); }

.product-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 4rem;
  align-items: start;
}

.product-intro {
  font-size: 1rem;
  color: var(--text-body);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  list-style: none;
}

.feature-list li {
  padding: 1.25rem 1.5rem;
  background: var(--off-white);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.tfus-section .feature-list li { background: var(--white); }

.feature-title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text-dark);
  margin-bottom: 0.4rem;
}

.feature-desc {
  font-size: 0.855rem;
  color: var(--text-body);
  line-height: 1.7;
}

.product-cta {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cta-note {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.7;
}

.product-visual { position: sticky; top: calc(var(--nav-h) + 2rem); }

.visual-placeholder {
  border-radius: var(--radius-lg);
  /*border: 2px dashed var(--border);*/
  aspect-ratio: 4/3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;  
}
/*.tms-visual { background: var(--light-gray); }*/
/*.tfus-visual { background: var(--accent-light); opacity: 0.65; }*/
.placeholder-label { font-family: var(--font-display); font-size: 1.1rem; color: var(--text-muted); }
.placeholder-note { font-size: 0.78rem; color: var(--text-muted); font-style: italic; }

@media (max-width: 1024px) {
  .arch-pillars { grid-template-columns: repeat(2, 1fr); }
  .product-layout { grid-template-columns: 1fr; }
  .product-visual { position: static; }
}


/* 轮播容器 - 优雅玻璃质感 */
.carousel-container {
  width: 100%;
  height: 100%;
  padding: 1.2rem;
  transition: all 0.2s;
}

.carousel {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1; 
  overflow: hidden;
}

/* 幻灯片容器 */
.slides {
  position: relative;
  width: 100%;
  height: 100%;
}

/* 单张幻灯片: 背景图 cover 居中，带淡入淡出过渡，无箭头也优雅 */
.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 0.7s cubic-bezier(0.2, 0.9, 0.4, 1.1);
  transform: scale(1.01);
  will-change: opacity;
}

/* 激活的幻灯片完全不透明，视觉干净 */
.slide.active {
  opacity: 1;
  transform: scale(1);
  z-index: 10;
}

/* 三张不同风格的高清图像 (延续之前神经网络、自然、都市概念，但使用更加赏心悦目的unsplash稳定图片) 
  并且每张都符合cover缩放规范，响应式满分 */
.slide-1 {
  background-image: url('./img/FUS-1.png');
  background-size: cover;     /* 图片填满且不变形 */
  background-position: center;
  width: 100%;
}
.slide-2 {
  background-image: url('./img/FUS-2.png');
  background-size: cover;     /* 图片填满且不变形 */
  background-position: center;
  width: 100%;
}
.slide-3 {
  background-image: url('./img/FUS-3.png');
  background-size: cover;     /* 图片填满且不变形 */
  background-position: center;
  width: 100%;
}

/* 优雅底部微渐变遮罩，让指示点更突出（无文字时增加层次） */
.slide::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 25%;
  /*background: linear-gradient(to top, rgba(0, 0, 0, 0.25), transparent);*/
  pointer-events: none;
  
}

/* 指示点组件 (dots) — 纯手动切换的唯一控件，简介大方 */
.dots {
  position: absolute;
  bottom: 22px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 14px;
  z-index: 25;
}

.dot {
  width: 10px;
  height: 10px;
  background: #6572d3;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.25s ease;
  backdrop-filter: blur(3px);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* 激活状态: 拉长圆角矩形，更直观显示当前图片位置 */
.dot.active {
  width: 32px;
  background: #6572d3;
  border-radius: 20px;
  box-shadow: 0 0 10px rgba(255, 255, 240, 0.9);
}

/* 移动端适配：点区域间距舒适 */
@media (max-width: 640px) {
  .carousel-container {
    padding: 0.8rem;
  }
  .dot {
    width: 8px;
    height: 8px;
  }
  .dot.active {
    width: 26px;
  }
  .dots {
    gap: 10px;
    bottom: 16px;
  }
  
}