body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    margin: 0;
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.content {
    width: 100%;
    max-width: 1200px;
}

.description {
    width: 100%;
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    align-items: center;
}

.description .des-content {
    width: 90%;
    display: flex;
    flex-direction: column;
}

.description .des-content div {
    margin-top: 10px;
    margin-bottom: 10px;
}

.description .des-content .title {
    font-size: 20px;
    font-weight: bold;
}

.description .des-content .des {
    font-size: 16px;
    color: #545c65;
}

.main {
    width: 100%;
    background-color: #f7fafc;
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    align-items: center;
    padding-bottom: 40px;
}

.main .select {
    width: 90%;
}

.main .select .title {
    font-size: 16px;
    margin-left: 15px;
    padding-top: 15px;
    margin-bottom: 15px;
}

.main .select .class-item {
    height: auto;
    min-height: 160px;
    align-items: center;
    margin-bottom: 15px;
}

.main .select .class-item .item {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    gap: 10px;
}

.main .select .class-item .item .item-item {
    cursor: pointer;
    width: 100%;
    max-width: 340px;
    height: 120px;
    border: 1px solid #dcdfe6;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-content: space-between;
    align-items: center;
    justify-content: space-evenly;
}

.main .select .class-item .item .item-item img {
    width: 30px;
}

.main .select .class-item .item .item-item .info {
    font-size: 14px;
    color: #545c65;
}

.main .select .class-item .month-content {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    padding-left: 0;
    justify-content: center;
}

.main .select .class-item .month-content .month {
    cursor: pointer;
    width: calc(50% - 10px);
    height: 30px;
    border: #a0aec0 1px solid;
    border-radius: 5px;
    display: flex;
    justify-content: center;
    margin: 5px;
    align-items: center;
}

.main .select .theme-item {
    height: auto;
    min-height: 220px;
    align-items: center;
}

.main .select .theme-item .theme {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.main .select .theme-item .theme .theme-box {
    cursor: pointer;
    width: 100%;
    max-width: 300px;
    height: 160px;
    border-radius: 15px 15px 0 0;
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    align-items: center;
}

.main .select .theme-item .theme .theme-box .theme-img {
    width: 100%;
    height: 80%;
}

.main .select .theme-item .theme .theme-box .theme-img img {
    width: 100%;
    height: 100%;
    border-radius: 15px 15px 0 0;
}

.main .select .model-item {
    height: auto;
    min-height: 260px;
    width: 100%;
}

.main .select .model-item .model {
    width: 100%;
    display: flex;
    flex-direction: column;
}

.main .select .model-item .model .model-box {
    width: 100%;
    margin-top: 15px;
}

.main .select .model-item .model .model-box .model-title {
    margin-left: 15px;
    margin-bottom: 10px;
}

.main .select .model-item .model .model-box .model-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.main .select .model-item .model .model-box .model-content .box {
    width: 100%;
    max-width: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
}

.main .select .model-item .model .model-box .model-content .box .box-img {
    width: 100%;
    height: 120px;
    margin-bottom: 10px;
    border-radius: 5px;
}

.main .select .model-item .model .model-box .model-content .box .box-img img {
    width: 100%;
    height: 100%;
    border: #a0aec0 1px solid;
    border-radius: 5px;
}

.main .select .submit-item {
    margin-top: 10px;
    width: 100%;
    display: flex;
    justify-content: center;
}

.main .select .submit-item .submit {
    cursor: pointer;
    width: 140px;
    height: 40px;
    background-color: #4db051;
    color: white;
    display: flex;
    border-radius: 5px;
    justify-content: space-around;
    align-items: center;
}

/* 平板及以上设备适配 */
@media (min-width: 768px) {
    .content {
        width: 1200px;
    }

    .main .select .class-item {
        height: 160px;
    }

    .main .select .class-item .item {
        flex-direction: row;
        justify-content: space-around;
    }

    .main .select .class-item .item .item-item {
        width: 340px;
    }

    .main .select .class-item .month-content {
        padding-left: 25px;
    }

    .main .select .class-item .month-content .month {
        width: 160px;
        margin-left: 5px;
        margin-right: 5px;
    }

    .main .select .theme-item {
        height: 220px;
    }

    .main .select .theme-item .theme {
        flex-direction: row;
        justify-content: space-between;
    }

    .main .select .theme-item .theme .theme-box {
        width: 300px;
    }

    .main .select .model-item {
        height: 260px;
    }

    .main .select .model-item .model {
        flex-direction: row;
    }

    .main .select .model-item .model .model-box {
        width: 50%;
    }

    .main .select .model-item .model .model-box .model-content {
        flex-direction: row;
        justify-content: space-around;
    }

    .main .select .model-item .model .model-box .model-content .box {
        width: 30%;
    }

    .main .select .submit-item {
        justify-content: space-around;
    }
}

/* 小屏幕手机适配 */
@media (max-width: 480px) {
    .main .select .class-item .month-content .month {
        width: calc(100% - 10px);
    }

    .description .des-content .title {
        font-size: 18px;
    }

    .description .des-content .des {
        font-size: 14px;
    }
}