.report_inner {
    display: none;
}

.report_title {
    width: 100%;
    text-align: left;
    background: #f5f5f5;
    border: none;
    padding: 10px;
    cursor: pointer;
    position: relative;
}

/* 矢印 */
.report_title::after {
    content: "";
    position: absolute;
    right: 15px;
    top: 50%;
    width: 8px;
    height: 8px;
    border-right: 2px solid #333;
    border-bottom: 2px solid #333;
    transform: translateY(-50%) rotate(45deg);
    transition: transform 0.3s;
}

.report_img {
    max-width: 100%;
}