.shine-main {
    min-height: 60vh;
    padding: 60px 0;
    background-color: #fff;
}

.major-grid {
    margin: 0 clamp(20px, 3vw, 40px);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(20px, 3vw, 36px);
    align-items: stretch;
    margin-top: clamp(20px, 3vh, 40px)
}

/* 卡片 */
.major-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(10, 20, 30, 0.06);
    transition: transform 0.45s ease, box-shadow 0.45s ease;
    background: #fff;
    display: flex;
    flex-direction: column;
    min-height: 320px; /* 确保基础高度 */
}

/* 图片容器比例控制 */
.major-item::before {
    content: "";
    padding-top: 60%; /* 图片区域占比60% */
    display: block;
}

/* 背景图片层 */
.major-item img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 60%; /* 固定图片高度比例 */
    object-fit: cover;
    transform-origin: center;
    transition: transform 0.6s ease;
    filter: saturate(1.05) contrast(0.98);
}

/* 卡片内部文字容器 */
.major-item .card-content {
    position: relative;
    z-index: 2;
    padding: clamp(22px, 3.5vw, 34px);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    flex: 1;
    min-height: 40%; /* 文字区域至少占40% */
    background: linear-gradient(to top, rgba(255,255,255,1), rgba(255,255,255,1));
}

/* 标题样式 */
.major-item h4 {
    margin: 0;
    font-size: clamp(18px, 1.6vw, 22px);
    color: rgba(10, 10, 10, 0.95);
    font-weight: 700;
    letter-spacing: 0.2px;
}

/* 段落样式 */
.major-item p {
    margin: clamp(8px, 1vw, 12px) 0 0;
    font-size: clamp(12px, 1vw, 14px);
    color: rgba(30, 30, 30, 0.85); /* 稍微加深文字颜色提高可读性 */
}

/* 悬停效果 */
.major-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 18px 40px rgba(10, 20, 30, 0.12);
}

.major-item:hover img {
    transform: scale(1.06);
}

/* 响应式调整 */
@media screen and (max-width: 1100px) {
    .major-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media screen and (max-width: 820px) {
    .major-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 480px) {
    .major-grid {
        grid-template-columns: 1fr;
    }
    .major-item {
        border-radius: 12px;
    }
}