.expandable-box {
    max-width: 600px;
    position: relative;
    overflow: hidden;
    background-color: #f9f9f9;
    margin-bottom: 20px;
}

/* افکت سفید پایین */
.expandable-box::after {
    content: "";
    display: none; /* پیش‌فرض مخفی */
    height: 60px;
    background: linear-gradient(to top, #bebebe, transparent);
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    pointer-events: none;
    z-index: 1;
}

.expandable-box.has-toggle::after {
  display: block;
}

/* دکمه لینک */
.expandable-box .expand-toggle {
    display: block;
    text-align: center;
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    background: #fdb814;
    padding: 7px 12px;
    font-size: 13px;
    color: #fff;
    cursor: pointer;
    text-decoration: none;
    border-radius: 5px;
}

/* حالت باز → افکت سفید حذف میشه */
.expandable-box.expanded::after {
    display: none;
}