.book-summary {
    background: url(./fig/mikasa-bg.jpg); /* 背景画像の指定 */
    background-color:rgba(255,255,255,0.6);
    background-blend-mode:lighten;
    background-size: cover;
  }
  
.responsive-video {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1em 0;
  } 

.responsive-img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1em auto;
  }  

  /* css for swiper */
#slide{ margin:0 auto; }
.swiper-container{ width:100%; max-width:650px; }
.swiper-slide-next,.swiper-slide-prev{ opacity: 0.5; }
/*
.swiper-button-prev:before,.swiper-button-next:before {
  	font-size:32px;
		color:#fff;
		font-weight:900;
}
.swiper-button-prev:before { content: "<<"; }
.swiper-button-next:before { content: ">>"; }
*/