* {
    box-sizing: border-box;
    font-family: 'Source Han Sans SC';
    margin: 0;
    padding: 0;
}

body {
    background-color: white;
}

.bold {
    font-weight: 700;
}

.textCenter {
    text-align: center;
}

.w100 {
    width: 100%;
}

/* 正文部分空出导航栏的高度 */
.mainContent {
    padding-top: 60px;
    padding-bottom: 50px;
    width: 85%;
    margin: 0 auto;
}

/* 大标题 */
.bigTitle {
    color: #FF4D4F;
    font-size: 32px;
    padding: 20px 0;
    margin: 10px 0;
    text-align: center;
    font-weight: 700;
}

.secondTitle {
    font-size: 20px;
    height: 50px;
    line-height: 50px;
}

.thirdTitle {
    padding: 10px 0;
}

.contentText {
    font-size: 16px;
    line-height: 28.8px;
    font-weight: 400;
}

/* 图片布局核心样式 - 修复5张图片大小统一 */
.twoImagesDiv {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
    gap: 20px;
    margin: 20px 0;
    width: 100%;
}

.imageDiv {
    /* 所有图片容器统一规则：桌面端每行2个，等宽分配 */
    flex: 1 1 calc(50% - 20px);
    min-width: 280px;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.imageDiv img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.imageDiv .textCenter.bold {
    margin-top: 12px;
    width: 100%;
    text-align: center;
    font-weight: bold;
    min-height: 3em;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.4;
}

/* 单张评级图片样式 */
.oneImage {
    width: 50%;
}

/* 移动端适配 */
@media only screen and (max-width: 600px) {
    /* 正文部分空出导航栏的高度 */
    .mainContent {
        width: 100%;
        padding: 70px 10px 50px;
    }

    .bigTitle {
        font-size: 25px;
    }

    .oneImage {
        width: 100%;
        height: auto;
    }

    .twoImagesDiv {
        flex-direction: column;
        align-items: center;
    }

    .imageDiv {
        width: 90%;
        flex: unset;
        max-width: 100%;
    }
}