/* 公共联系入口：独立设置图标，避免旧的整张客服背景图遮挡点击区域。 */
.content-con .celan,
.banner .celan {
    background: none;
    width: 76px;
    height: 132px;
    right: 24px;
    top: auto;
    bottom: 32px;
}
.celan > .celan-goback {
    top: 0;
    height: 44px;
    border-radius: 12px;
    background: #eef3f7;
    text-align: center;
    color: #445568;
}
.celan > .celan-goback::before {
    content: "↑";
    font: bold 30px/44px Arial, sans-serif;
}
.celan > .celan-kefu {
    top: auto;
    bottom: 0;
    height: 76px;
    border: 3px solid #fff;
    border-radius: 50%;
    background: #25d366 url('../img/whatsapp.jpg') center / cover no-repeat;
    box-shadow: 0 5px 18px rgba(0, 0, 0, .2);
    transition: transform .2s;
}
.celan > .celan-kefu:hover,
.celan > .celan-kefu:focus-visible {
    transform: scale(1.08);
    outline: 3px solid #128c7e;
}
/* 小屏缩小边距，保持入口易于点击，又不占用过多正文宽度。 */
@media (max-width: 640px) {
    .content-con .celan, .banner .celan { width: 64px; height: 116px; right: 12px; bottom: 16px; }
    .celan > .celan-kefu { height: 64px; }
}