@media (min-width: 120px) {
  h2 {
    margin: 4rem;
    text-align: center;
    font-size: 5rem;
  }
  p {
    margin: 2rem;
    font-size: 4rem;
    line-height: 6rem;
  }
  .option_box {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    margin: 4rem auto;
    width: 98rem;
    border: 0.1rem solid #666;
    box-shadow: 5px 5px 8px -5px #191919;
  }
  .option_box .btn_box {
    position: relative;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    width: 88%;
    margin: 0 auto;
  }
  .option_box .btn_box a {
    margin: 1rem;
    width: 40rem;
    height: 16rem;
    border: 1px solid #666;
    border-radius: 1rem;
    background-color: green;
    box-shadow: 5px 5px 8px -5px #191919;
    line-height: 16rem;
    text-align: center;
    font-size: 6rem;
    color: #fff;
  }
  .option_box .btn_box a:nth-child(odd) {
    background-color: orangered;
  }
  .prize_list {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    margin: 4rem auto;
    width: 98rem;
    border: 0.1rem solid #666;
    box-shadow: 5px 5px 8px -5px #191919;
  }
  .prize_list .prize_set {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    border-top: 0.1rem solid #666;
    border-bottom: 0.1rem solid #666;
  }
  .prize_list .prize_set .img_box {
    position: relative;
    display: flex;
    width: 45rem;
    height: 40rem;
    align-items: center;
  }
  .prize_list .prize_set .img_box .box_center {
    width: 45rem;
    height: 30rem;
    overflow: hidden;
    border-radius: 2rem;
    border: none;
    box-shadow: 5px 5px 8px -5px rgba(245, 181, 6, 0.932);
  }
  .prize_list .prize_set .img_box .box_center .this_prize {
    position: absolute;
    top: 20rem;
    right: 3rem;
    width: 39rem;
    height: 12rem;
    font-size: 8rem;
    font-weight: 800;
    line-height: 10rem;
    text-align: center;
    padding: 1rem;
    border: 1px solid #999;
    border-radius: 1rem;
    color: #fff;
    background-color: #A033CC;
    white-space: nowrap;
    z-index: 9;
  }
  .prize_list .prize_set .img_box .box_center:hover {
    border: 2px solid rgba(245, 181, 6, 0.932);
  }
  .prize_list .prize_set .img_box .box_center img {
    width: 100%;
    height: 100%;
  }
  .prize_list .content_box {
    position: relative;
    display: flex;
    align-items: center;
    width: 63rem;
    height: 40rem;
    overflow: hidden;
  }
  .prize_list .content_box .content_center {
    margin-left: 4rem;
  }
  .prize_list .content_box .content_center .prize_detail_btn {
    position: absolute;
    display: block;
    top: 2rem;
    right: 2rem;
    width: 21rem;
    height: 7rem;
    border: 1px solid #666;
    border-radius: 1rem;
    background-color: green;
    box-shadow: 5px 5px 8px -5px #191919;
    line-height: 8rem;
    text-align: center;
    font-size: 4rem;
    color: #fff;
  }
  .prize_list .content_box .content_center .sponsor_box {
    position: absolute;
    display: block;
    bottom: 2rem;
    right: 2rem;
    width: 21rem;
    height: 7rem;
    border: 1px solid #666;
    border-radius: 1rem;
    box-shadow: 5px 5px 8px -5px #191919;
  }
  .prize_list .content_box .content_center .sponsor_box img {
    width: 100%;
    height: 100%;
    background-color: #9ea09c;
  }
  .lucky_bar {
    position: relative;
    margin: auto;
    width: 96rem;
    height: 54rem;
    cursor: pointer;
  }
  .lucky_bar #bingo_confirmed {
    position: absolute;
    position: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    top: 0;
    left: 0;
    width: 96rem;
    height: 54rem;
    border: 0.2rem solid rgba(245, 181, 6, 0.932);
    background: rgba(32, 32, 31, 0.932);
    background: -webkit-gradient(linear, left top, left bottom, from(rgba(32, 32, 31, 0.9)), to(rgba(71, 71, 69, 0.9)));
    border-radius: 0.5rem;
    text-align: center;
    z-index: 98;
  }
  .lucky_bar #bingo_confirmed #content {
    margin: 6rem auto;
    width: 72rem;
    height: 40rem;
    border: 1px solid #666;
    border-radius: 1rem;
    font-size: 4rem;
  }
  .lucky_bar #bingo_confirmed #content #ask,
  .lucky_bar #bingo_confirmed #content #yes,
  .lucky_bar #bingo_confirmed #content #no {
    margin: 2rem auto;
    color: #fff;
  }
  .lucky_bar #bingo_confirmed #content #yes,
  .lucky_bar #bingo_confirmed #content #no {
    width: 40rem;
    height: 10rem;
    border: 1px solid #666;
    border-radius: 1rem;
    background-color: green;
  }
  .lucky_bar #bingo_confirmed #content #no {
    background-color: red;
  }
  #gray_canvas {
    position: absolute;
    margin: auto;
    width: 96rem;
    height: 54rem;
    background-size: 96rem 54rem;
  }
  #prize_canvas {
    position: absolute;
    margin: auto;
    width: 96rem;
    height: 54rem;
    overflow: hidden;
  }
  #prize_canvas img {
    width: 100%;
    height: 100%;
  }
  #prize_cover {
    position: absolute;
    margin: auto;
    width: 96rem;
    height: 54rem;
    overflow: hidden;
  }
  #prize_cover img {
    width: 100%;
    height: 100%;
  }
  .bottom_bar {
    margin: auto;
    width: 96rem;
  }
}
/* 1. 設定父元素 #lucky_bar 為相對定位 */
.lucky_bar {
  position: relative;
  /* 定位基準點 */
}
/* 2. 修正 #custom-alert 為絕對定位 (absolute) */
#custom-alert {
  visibility: hidden;
  min-width: 250px;
  background-color: #333;
  color: #fff;
  text-align: center;
  border-radius: 8px;
  padding: 16px;
  /* ⭐ 修正：從 fixed 改為 absolute，使其相對於父元素 lucky_bar 定位 ⭐ */
  position: absolute;
  /* z-index 保持，確保它在 canvas 上方 */
  z-index: 9999;
  left: 50%;
  top: 10%;
  /* 距離 lucky_bar 頂部 30% */
  transform: translateX(-50%);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  font-size: 24px;
  line-height: 48px;
  /* 修正了之前缺失的分號 */
  opacity: 0;
  transition: opacity 0.5s, visibility 0.5s;
}
/* 顯示動畫 (不變) */
#custom-alert.show {
  visibility: visible;
  opacity: 1;
}
@media (min-width: 750.1px) {
  h2 {
    margin: 2rem;
    text-align: center;
    font-size: 2.5rem;
  }
  p {
    margin: 0.5rem;
    font-size: 1.5rem;
    line-height: 2.5rem;
  }
  .option_box {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    margin: 2rem auto;
    width: 71rem;
    border: 0.1rem solid #666;
    box-shadow: 5px 5px 8px -5px #191919;
  }
  .option_box .btn_box {
    position: relative;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    width: 88%;
    margin: 0 auto;
  }
  .option_box .btn_box a {
    margin: 1rem;
    width: 30rem;
    height: 8rem;
    border: 1px solid #666;
    border-radius: 0.5rem;
    background-color: green;
    box-shadow: 5px 5px 8px -5px #191919;
    line-height: 8rem;
    text-align: center;
    font-size: 3rem;
    color: #fff;
  }
  .option_box .btn_box a:nth-child(odd) {
    background-color: orangered;
  }
  .prize_list {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    margin: 2rem auto;
    width: 71rem;
    border: 0.1rem solid #666;
    box-shadow: 5px 5px 8px -5px #191919;
  }
  .prize_list .prize_set {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    border-top: 0.1rem solid #666;
    border-bottom: 0.1rem solid #666;
  }
  .prize_list .prize_set .img_box {
    position: relative;
    display: flex;
    width: 30rem;
    height: 20rem;
    align-items: center;
  }
  .prize_list .prize_set .img_box .box_center {
    width: 28rem;
    height: 15.75rem;
    overflow: hidden;
    border-radius: 1rem;
    border: none;
    box-shadow: 5px 5px 8px -5px rgba(245, 181, 6, 0.932);
  }
  .prize_list .prize_set .img_box .box_center .this_prize {
    position: absolute;
    top: 9.5rem;
    right: 6rem;
    width: 20rem;
    height: 6rem;
    font-size: 4rem;
    font-weight: 800;
    line-height: 6rem;
    text-align: center;
    padding: 0.5rem;
    border: 1px solid #999;
    border-radius: 0.5rem;
    color: #fff;
    background-color: #A033CC;
    white-space: nowrap;
    z-index: 9;
  }
  .prize_list .prize_set .img_box .box_center:hover {
    border: 2px solid rgba(245, 181, 6, 0.932);
  }
  .prize_list .prize_set .img_box .box_center img {
    width: 100%;
    height: 100%;
  }
  .prize_list .prize_set .content_box {
    position: relative;
    display: flex;
    align-items: center;
    width: 41rem;
    height: 20rem;
    overflow: hidden;
  }
  .prize_list .prize_set .content_box .content_center {
    margin-left: 2rem;
  }
  .prize_list .prize_set .content_box .content_center .prize_detail_btn {
    position: absolute;
    display: block;
    top: 1rem;
    right: 1rem;
    width: 12rem;
    height: 4rem;
    border: 1px solid #666;
    border-radius: 0.5rem;
    background-color: green;
    box-shadow: 5px 5px 8px -5px #191919;
    line-height: 4rem;
    text-align: center;
    font-size: 1.5rem;
    color: #fff;
  }
  .prize_list .prize_set .content_box .content_center .sponsor_box {
    position: absolute;
    display: block;
    bottom: 1rem;
    right: 1rem;
    width: 12rem;
    height: 4rem;
    border: 1px solid #666;
    border-radius: 0.5rem;
    box-shadow: 5px 5px 8px -5px #191919;
  }
  .prize_list .prize_set .content_box .content_center .sponsor_box img {
    width: 100%;
    height: 100%;
    background-color: #9ea09c;
  }
  .lucky_bar {
    position: relative;
    margin: auto;
    width: 64rem;
    height: 36rem;
  }
  .lucky_bar #bingo_confirmed {
    position: absolute;
    position: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    top: 0;
    left: 0;
    width: 64rem;
    height: 36rem;
    border: 0.1rem solid rgba(245, 181, 6, 0.932);
    background: rgba(32, 32, 31, 0.932);
    background: -webkit-gradient(linear, left top, left bottom, from(rgba(32, 32, 31, 0.9)), to(rgba(71, 71, 69, 0.9)));
    border-radius: 0.25rem;
    text-align: center;
    z-index: 98;
  }
  .lucky_bar #bingo_confirmed #content {
    margin: 9rem auto;
    width: 32rem;
    height: 18rem;
    border: 1px solid #666;
    border-radius: 0.5rem;
    font-size: 1.5rem;
  }
  .lucky_bar #bingo_confirmed #content #ask,
  .lucky_bar #bingo_confirmed #content #yes {
    margin: 1rem auto;
    color: #fff;
  }
  .lucky_bar #bingo_confirmed #content #yes,
  .lucky_bar #bingo_confirmed #content #no {
    width: 20rem;
    height: 4.5rem;
    border: 1px solid #666;
    border-radius: 0.5rem;
    background-color: green;
  }
  .lucky_bar #bingo_confirmed #content #no {
    background-color: red;
  }
  #gray_canvas {
    position: absolute;
    margin: auto;
    width: 64rem;
    height: 36rem;
    background-size: 64rem 36rem;
  }
  #prize_canvas {
    position: absolute;
    margin: auto;
    width: 64rem;
    height: 36rem;
    overflow: hidden;
  }
  #prize_canvas img {
    width: 100%;
    height: 100%;
  }
  #prize_cover {
    position: absolute;
    margin: auto;
    width: 64rem;
    height: 36rem;
    overflow: hidden;
  }
  #prize_cover img {
    width: 100%;
    height: 100%;
  }
  .bottom_bar {
    margin: auto;
    width: 64rem;
  }
}