:root {
  --bobo-pic-columns-title-size: 36px;
  --bobo-pic-columns-text-size: 18px;
  --bobo-pic-columns-text-leading: 1.55;
  --bobo-pic-columns-text-mb: 28px;
  --bobo-pic-columns-pd: 80px 0;
  --bobo-pic-columns-ul-m: 40px -12px 0;
  --bobo-pic-columns-li-p: 12px;
  --gap: 20px;
}

.bobo-pic-columns {
  position: relative;
  background: #fff;
  padding: 50px 0;
}

.bobo-pic-columns h3 {
  font-size: var(--bobo-pic-columns-title-size);
  font-weight: 700;
  line-height: 1;
  text-align: center;
}

.gallery-content {
    display: flex;
    flex-direction: column;
    gap: var(--gap);
}

.gallery-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center; /* 关键：使不满一行的项居中 */
    margin: calc(var(--gap) / -2); /* 抵消子元素的 padding */
}

.gallery-item {
    padding: calc(var(--gap) / 2);
    /* 核心逻辑：强制宽度为 25%，无论一排有几个，大小都一样 */
    flex: 0 0 25%; 
    max-width: 25%;
}

/* Responsive adjustment */
@media (max-width: 1024px) {
    .gallery-item {
        flex: 0 0 33.333%;
        max-width: 33.333%;
    }
}

@media (max-width: 640px) {
    .gallery-item {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

@-webkit-keyframes arrow-nudge-right {
  0% {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }

  40% {
    -webkit-transform: translateX(10px);
    transform: translateX(10px);
  }

  100% {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }
}

@keyframes arrow-nudge-right {
  0% {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }

  40% {
    -webkit-transform: translateX(10px);
    transform: translateX(10px);
  }

  100% {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }
}

.bobo-pic-columns ul li:last-child:hover .t p::after {
  -webkit-animation: arrow-nudge-right 0.5s cubic-bezier(0.22, 1.03, 0.69, 0.97)
    0.3s;
  animation: arrow-nudge-right 0.5s cubic-bezier(0.22, 1.03, 0.69, 0.97) 0.3s;
}

@media screen and (max-width: 1500px) {
  :root {
    --bobo-pic-columns-title-size: 32px;
    --bobo-pic-columns-text-size: 16px;
    --bobo-pic-columns-text-mb: 24px;
  }
}

@media screen and (max-width: 1280px) {
  :root {
    --bobo-pic-columns-title-size: 28px;
  }
}

@media screen and (max-width: 992px) {
  :root {
    --bobo-pic-columns-title-size: 24px;
  }
}

@media screen and (max-width: 991px) {
  :root {
    --bobo-pic-columns-title-size: 28px;
    --bobo-pic-columns-text-leading: 1.4;
    --bobo-pic-columns-text-mb: 0;
    --bobo-pic-columns-pd: 30px 0;
    --bobo-pic-columns-ul-m: 25px -10px 0;
    --bobo-pic-columns-li-p: 10px;
  }

  .bobo-pic-columns {
    padding: 30px 0;
  }

  .bobo-pic-columns ul li:last-child .t > div{
   margin: 0 auto 20px 0;
  }
  .bobo-pic-columns ul li .box {
    padding: 10px 10px 0;
    box-shadow: 0 2px 10px 0 #e9e9e9;
  }

  .bobo-pic-columns ul li .txt {
    padding: 15px 10px;
  }

  .bobo-pic-columns ul li:last-child .box {
    padding: 10px;
  }

  .bobo-pic-columns ul li:last-child .t {
    padding: 20px;
  }

  .bobo-pic-columns ul li:last-child .t p {
    line-height: 1.6;
  }
}

@media screen and (max-width: 576px) {
  :root {
    --bobo-pic-columns-title-size: 24px;
    --bobo-pic-columns-text-size: 18px;
    --bobo-pic-columns-text-mb: 0;
    --bobo-pic-columns-ul-m: 25px -10px 0;
    --bobo-pic-columns-li-p: 10px;
  }
  .bobo-pic-columns ul li:last-child .t p {
    line-height: var(--bobo-pic-columns-text-leading);
  }
}