.hero-bg {
    background-image: url("../images/x.png");
    background-size: 100%;        /* 填满 */
    background-position: center;   /* 居中 */
    background-repeat: no-repeat;
    position: relative;
  }
  
  .hero-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.65); /* 白色柔和遮罩 */
    z-index: 0;
  }
  
  .hero-bg .hero-body {
    position: relative;
    z-index: 1;
  }
  

/* ================================
   Abstract
   ================================ */

.highlight {
    background: rgba(255, 221, 87, 0.25);
    padding: 0.1em 0.3em;
    border-radius: 4px;
  }
  
.highlight-strong {
background: rgba(72, 199, 142, 0.25);
padding: 0.15em 0.35em;
border-radius: 5px;
font-weight: 600;
}

.highlight-blue {
    background: rgba(72, 95, 199, 0.22);
    padding: 0.12em 0.32em;
    border-radius: 5px;
    font-weight: 500;
  }
  

.video-ours {
outline: 3px solid #48c78e; /* Bulma green */
outline-offset: -3px;
}


  /* ================================
   Scene carouse(Reference + Video)
   ================================ */
   #scene-carousel {
    overflow: hidden;
    padding: 1rem 0;
  }
  
  #scene-carousel .item {
    margin: 1rem;
    overflow: hidden;
    padding: 1.5rem;
    font-size: 0;
    background: var(--background-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
  }
  
  #scene-carousel .item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }
  
  #scene-carousel .item img,
  #scene-carousel video {
    margin: 0;
    border-radius: var(--border-radius);
    width: 100%;
    height: auto;
  }
  
  #scene-carousel .subtitle {
    font-size: 1rem !important;
    color: var(--text-secondary);
    margin-top: 1rem;
    font-weight: 500;
  }