.button-4 {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 250px;
    margin:0 auto;
    padding: .9em 2em;
    border: none;
    border-bottom: solid 5px #0059a0;
    border-radius: 5px;
    background-color: #2589d0;
    color: #fff;
    font-weight: 600;
    font-size: 1em;
    transition: .5s ease;
}

.button-4:hover {
    transform: translateY(3px);
    border-bottom-width: 2px;
}

.button-999 {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 250px;
    margin:0 auto;
    padding: .9em 2em;
    border: none;
    border-bottom: solid 5px #CC0033;
    border-radius: 5px;
    background-color: #ff0000;
    color: #fff;
    font-weight: 600;
    font-size: 1em;
    transition: .5s ease;
}

.button-999:hover {
    transform: translateY(3px);
    border-bottom-width: 2px;
}


.heading-1 {
    padding: .5em .7em;
    border-left: 5px solid #ff0000;
    color: #333333;
}
.read-more-1 {
    position: relative;
}

.read-more-1 p {
    position: relative;
    max-height: 100px; /* 開く前に見せたい高さを指定 */
    margin-bottom: 0;
    overflow: hidden;
    transition: max-height 1s;
}

.read-more-1:has(:checked) p {
    max-height: 100vh;
}

.read-more-1 p::after {
    display: block;
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 60px;
    background: linear-gradient(180deg, hsla(0, 0%, 100%, 0) 0, hsla(0, 0%, 100%, .9) 50%, hsla(0, 0%, 100%, .9) 0, #fff);
    content: '';
}

.read-more-1:has(:checked) p::after {
    content: none;
}

.read-more-1 label {
    display: flex;
    align-items: center;
    gap: 0 4px;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    color: #4f96f6;
    font-size: .8em;
}

.read-more-1 label:hover {
    color: #c7511f;
    text-decoration: underline;
    cursor: pointer;
}

.read-more-1:has(:checked) label {
    display: none;
}

.read-more-1 label::after {
    display: inline-block;
    width: 10px;
    height: 5px;
    background-color: #b6bdc3;
    clip-path: polygon(0 0, 100% 0, 50% 100%);
    content: '';
}

.read-more-1 input {
    display: none;
}