/* 带标签的区域 */
.shape {
    border-style: solid;
    border-width: 0 70px 40px 0;
    float: right;
    height: 0px;
    width: 0px;
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
}
.offer {
    background: #fff;
    border: 1px solid #ebebeb;
    box-shadow: 0 1px 15px 1px rgba(77, 82, 89, .075);
    margin: 15px 0;
    overflow: hidden;
}
.shape {
    border-color: rgba(255, 255, 255, 0) #4d5259 rgba(255, 255, 255, 0) rgba(255, 255, 255, 0);
}
.offer-primary {
    border-color: var(--bs-primary);
}
.offer-primary .shape {
    border-color: transparent var(--bs-primary) transparent transparent;
}
.offer-danger {
    border-color: var(--bs-danger);
}
.offer-danger .shape {
    border-color: transparent var(--bs-danger) transparent transparent;
}
.offer-success {
    border-color: var(--bs-success);
}
.offer-success .shape {
    border-color: transparent var(--bs-success) transparent transparent;
}
.offer-default {
    border-color: #eff2f7;
}
.offer-default .shape {
    border-color: transparent #eff2f7 transparent transparent;
}
.offer-info {
    border-color: var(--bs-info);
}
.offer-info .shape {
    border-color: transparent var(--bs-info) transparent transparent;
}
.offer-warning {
    border-color: var(--bs-warning);
}
.offer-warning .shape {
    border-color: transparent var(--bs-warning) transparent transparent;
}
.shape-text {
    color: #fff;
    font-size: 12px;
    font-weight: bold;
    position: relative;
    right: -47px;
    top: 0px;
    white-space: nowrap;
    -ms-transform: rotate(30deg);
    -o-transform: rotate(360deg);
    -webkit-transform: rotate(30deg);
    transform: rotate(30deg);
}
.offer-content {
    padding: 20px;
}
/* 上两个可弄成通用类 */
.ribbon {
    width: 150px;
    height: 150px;
    overflow: hidden;
    position: absolute;
    z-index: 10;
}
.ribbon-top-left {
    top: -10px;
    left: -10px;
}
.ribbon::before,
.ribbon::after {
    position: absolute;
    z-index: -1;
    content: '';
    display: block;
    border: 5px solid;
}
.ribbon span {
    position: absolute;
    display: block;
    width: 225px;
    padding: 8px 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, .075);
    color: #fff;
    text-shadow: 0 1px 1px rgba(0, 0, 0, .2);
    text-transform: capitalize;
    text-align: center;
}
.ribbon-top-left {
    top: -10px;
    left: -10px;
}
.ribbon-top-left::before,
.ribbon-top-left::after {
    border-top-color: transparent;
    border-left-color: transparent;
}
.ribbon-top-left::before {
    top: 0;
    right: 50px;
}
.ribbon-top-left::after {
    bottom: 50px;
    left: 0;
}
.ribbon-top-left span {
    right: -8px;
    top: 30px;
    transform: rotate(-45deg);
}
.ribbon-top-right {
    top: -10px;
    right: -10px;
}
.ribbon-top-right::before,
.ribbon-top-right::after {
    border-top-color: transparent;
    border-right-color: transparent;
}
.ribbon-top-right::before {
    top: 0;
    left: 36px
}
.ribbon-top-right::after {
    bottom: 36px;
    right: 0;
}
.ribbon-top-right span {
    left: -8px;
    top: 30px;
    transform: rotate(45deg);
}