.item-block {
    font-size: 100px;
    --gap: 0.72em;
    --padding-gap: var(--gap, 0.72em);
    padding-top: 1.2em;
    padding-bottom: 1.2em;
    min-height: 100vh;
    color: #000;
}
.item-block .title {
    font-size: 40px;
    font-weight: 600;
    text-align: center;
}
.item-block.bg-gray {
    background: #F7F7F7;
}
.item-block .wrapper {
    max-width: 12em;
    margin: 0 auto;
    padding: 0 0.4em;
    box-sizing: content-box;
}
.block-cons {
    margin-top: 0.6em;
}
.tab-box ul {
    margin-right: -1px;
}
.tab-box li {
    float: left;
    border-right: 1px solid #fff;
    width: 33.33333%;
    font-size: 16px;
    line-height: 1.56;
    background-color: #9D9FA2;
    color: #fff;
    height: 52px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
}
.tab-box li:first-child {
    border-radius: 10px 0 0 0;
}
.tab-box li:last-child {
    border-right: none;
    border-radius: 0 10px 0 0;
}
.tab-box li.active {
    background-color: #fff;
    color: #000;
}
.tab-contents {
    padding: 0 var(--padding-gap);
    background: #fff;
    border-radius: 0 0 10px 10px;
}
.issue-list {
    padding: 0.48em 0;
    display: none;
}
.issue-list li {
    cursor: pointer;
    border-bottom: 1px solid rgba(0,0,0,0.2)
}
.issue-list li:last-child {
    border-bottom: none;
}
.issue-list .topic {
    font-size: 16px;
    margin: 1.25em 0;
    max-height: 64px;
    position: relative;
    font-weight: 500;
    padding-right: 16px;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2; /* 这里是超出几行省略 */
    overflow: hidden;
}
  
  .issue-list .answer {
    padding-bottom: 1.5em;
    display: none;
    overflow: hidden;
    font-size: 16px;
    color: #808080;
    line-height: 1.5;
  }
  .issue-list .answer a{
    color: #51F190;
  }
  .issue-list .answer a:hover {
    text-decoration: underline;
  }
  .topic i {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1em;
    transition: all .2s ease;
    color: #000;
  }
  .topic.active i {
    transform: translateY(-50%) rotate(180deg);
    transform-origin: center;
  }




@media (max-width: 1400px) {
    .item-block {
        font-size: 90px;
    }
}
@media (max-width: 1200px) {
    .item-block {
        font-size: 75px;
    }
    .tab-box li {
        height: 48px;
    }
}
@media (max-width: 1023px){
    .item-block .title {
        font-size: 32px;
    }
}
@media (max-width: 767px) {
    .item-block {
        margin-top: 10px;
        border-radius: 6px;
        background: #fff;
        padding: 32px 0;
    }
    .item-block.bg-gray {
        background: #fff;
    }
    .item-block {
        font-size: 50px;
    }
    .item-block .wrapper {
        padding-left: 0;
        padding-right: 0;
    }
    .item-block .title {
        font-size: 28px;
    }
    .block-cons {
        margin-top: 24px;
    }
    .tab-box li.active {
        box-shadow: inset 0px 1px 0px 0px #B6B6B6;
        background-color: #fff;
    }
    .tab-box ul {
        max-width: 100%;
        display: flex;
        white-space: nowrap;
    }
    .tab-box {
        overflow-x: auto;
    }
    .tab-box li {
        font-size: 14px;
        float: initial;
        height: 44px;
        line-height: 44px;
        width: auto;
        min-width: 33.3333%;
        padding: 0 16px;
        display: inline-block;
    }
    .tab-box li:first-child,
    .tab-box li:last-child {
        border-radius: 0;
    }
    .issue-list .topic {
        font-size: 14px;
        margin-top: 16px;
        margin-bottom: 16px;
        max-height: 44px;
    }
    .issue-list .answer {
        font-size: 14px;
        padding-bottom: 16px;
    }
    .issue-list {
        padding-top: 24px;
        padding-bottom: 0;
    }
  }