.research {
    padding: 40px 0;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}


.research-header {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 50px;
    margin-bottom: 30px;
    overflow: hidden;
}


.research-header img {
    /* max-width: 30vw; */
    height: auto;
    object-fit: contain;
    min-width: 0;
    flex-shrink: 1;
}

.research-header h2 {
    width: 296px;
    height: 45px;
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    font-size: 32px;
    line-height: 39px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    flex: none;
    order: 0;
    flex-grow: 0;
}

.research-content {
    display: flex;
    flex-direction: column;
    /* margin-bottom: 30px; */
}

.research-warp {
    display: flex;
    flex-wrap: wrap;
}

.research-img {
    width: 262px;
    max-width: 100%;
    cursor: pointer;
    display: block;
}

.research-title {
    margin-bottom: 10px;
}

.research-line {
    display: inline-block;
    width: 90%;
    margin-left: 30px;
}

.research-item {
    width: 260px;
    margin-bottom: 30px;
    display: flex;
    margin-right: 20px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.research-item:hover {
    transform: translateY(-5px);
    opacity: 0.8;
}

.research-item>div {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
}

.research-item .title {
    background: #333333;
    padding: 10px;
    min-height: 70px;
    flex: 1;
}

.research-sub-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
    background: radial-gradient(50% 363.64% at 50% 50%, #3F5747 0%, #150C05 100%);
    padding-bottom: 60px;
}

.research-sub-header .research-title {
    font-weight: 900;
    font-size: 48px;
    line-height: 58px;
    text-align: center;
    color: #FFFFFF;
}

.research-sub-header .research-sub-title {
    font-weight: 600;
    font-size: 24px;
    line-height: 29px;
    text-align: center;
    color: #FFFFFF;
}

.research-sub-item-list {
    display: flex;
    margin-top: 20px;
}

.research-sub-item {
    width: 380px;
    background: #6D805E;
    /* opacity: 0.5; */
    box-shadow: 0px 4px 10px 10px rgba(0, 0, 0, 0.25);
    margin: 0 10px;
}

.research-sub-item-text {
    padding: 10px;
}

.research-sub-item-title {
    font-weight: 900;
    font-size: 24px;
    line-height: 29px;
    color: #FFFFFF;
}

.research-sub-item-desc {
    margin-top: 10px;
    font-weight: 400;
    font-size: 14px;
    line-height: 20px;
    color: #FFFFFF;

}

.research-sub-item-item {
    padding: 16px 8px;
    width: 380px;
    background: #6D805E;
    /* opacity: 0.5; */
    box-shadow: 0px 4px 10px 10px rgba(0, 0, 0, 0.25);
    margin: 0 10px;
}

.research-sub-item-item .research-sub-item-title {
    font-weight: 900;
    font-size: 20px;
    line-height: 30px;
    text-align: center;
    color: #FFFFFF;
}

.research-sub-item-item .research-sub-item-desc {
    font-weight: 700;
    font-size: 16px;
    line-height: 30px;
    text-align: center;
    color: #FFFFFF;
}

/* AI Design Section */
.research-ai-section {
    background: radial-gradient(50% 50% at 50% 50%, #6A4126 0%, #150C05 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
    overflow: hidden;
    /* Ensure content doesn't spill out */
}

.research-ai-header {
    margin-bottom: 40px;
}

.research-ai-title {
    font-weight: 900;
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 16px;
    text-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);
}

.research-ai-desc {
    font-size: 20px;
    font-weight: 400;
    opacity: 0.9;
}

.research-ai-visual {
    margin: 40px 0;
    width: 100%;
    /* Ensure it breaks out of any potential container constraints if needed,
       but here it is inside a full-width section so 100% is fine. */
}

.research-ai-visual img {
    width: 100%;
    height: auto;
    margin: 0 auto;
    display: block;
    object-fit: cover;
    /* Ensure it covers nicely if we had a fixed height, but with auto height it just scales. */
}

.research-ai-features {
    display: flex;
    justify-content: center;
    align-items: stretch;
    /* Stretch items to equal height for dividers */
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    gap: 40px;
    text-align: left;
    /* Reset text align for features */
}

.ai-feature-item {
    flex: 1;
    max-width: 350px;
    /* Limit width of each column */
    text-align: center;
    /* Center text within item as per design image usually, checking image again... */
    display: flex;
    flex-direction: column;
    justify-content: center;
    /* Center content vertically if needed */
}

/* Looking at the image again:
   Left block: "AI 交互..." -> Left aligned or Center? Looks Centered relative to itself.
   Actually, the lines under the image connect to these.
   Let's Center align the content of each feature block.
*/
.ai-feature-item {
    text-align: center;
}

.feature-title {
    font-weight: 700;
    font-size: 24px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.feature-desc {
    font-size: 16px;
    line-height: 1.6;
    opacity: 0.9;
}

.ai-feature-divider {
    display: block;
    width: 1px;
    height: 80px;
    /* Fixed visually pleasing height */
    align-self: center;
    background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.5), transparent);
}

/* 响应式适配 */
@media (max-width: 1024px) {
    .research-sub-header .research-title {
        font-size: 36px;
    }

    .research-sub-item,
    .research-sub-item-item {
        width: calc(50% - 20px);
    }

    .research-sub-item-list {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .research {
        padding: 20px 15px;
    }

    .research-header {
        flex-direction: column;
        margin-top: 30px;
    }

    .research-header h2 {
        width: auto;
        font-size: 24px;
        margin-top: 15px;
    }

    .research-sub-header {
        padding-bottom: 40px;
    }

    .research-sub-header .research-title {
        font-size: 28px;
        line-height: 1.2;
        padding: 0 15px;
    }

    .research-sub-header .research-sub-title {
        font-size: 18px;
        padding: 0 15px;
    }

    .research-sub-item-list {
        flex-direction: column;
        align-items: center;
        width: 100%;
        padding: 0 15px;
    }

    .research-sub-item,
    .research-sub-item-item {
        width: 100%;
        max-width: 450px;
        margin: 10px 0;
    }

    .research-ai-title {
        font-size: 32px;
    }

    .research-ai-desc {
        font-size: 16px;
        padding: 0 15px;
    }

    .research-ai-features {
        flex-direction: column;
        gap: 30px;
        align-items: center;
    }

    .ai-feature-item {
        max-width: 100%;
    }

    .ai-feature-divider {
        width: 80%;
        height: 1px;
        background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.5), transparent);
    }

    .research-warp {
        justify-content: center;
    }

    .research-item {
        margin-right: 0;
        width: 100%;
        max-width: 320px;
    }

    .research-img {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .research-sub-header .research-title {
        font-size: 24px;
    }

    .research-ai-title {
        font-size: 24px;
    }

    .feature-title {
        font-size: 20px;
    }
}