/* ===== 科研实力页 Banner（单张，与首页同宽高） ===== */
.science-banner {
    position: relative;
    width: 100%;
    height: 600px;
    overflow: hidden;
    background: var(--color-gradient-light);
}
.science-banner .banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.science-banner .banner-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== 研发中心（上文 + 下方一整张大图） ===== */
.science-rd {
    padding: 60px 15% 0;
    background: #fff;
}
.rd-text {
    margin-bottom: 30px;
}
.rd-title,
.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1a3a7a;
    margin: 0 0 30px 0;
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
}
.rd-title__line,
.section-title__line {
    flex: 1;
    height: 2px;
    background: #1a3a7a;
}
.rd-image {
    width: 100%;
}
.rd-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* ===== 三大中心（检测 / 原料 / 创新） ===== */
.science-centers {
    padding: 60px 10% 80px;
    background: #fff;
}
.centers-list {
    display: flex;
    gap: 40px;
}
.center-item {
    flex: 1;
    min-width: 0;
}
.center-img {
    margin-bottom: 20px;
    border-radius: 4px;
    overflow: hidden;
}
.center-img img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform .3s ease;
}
.center-item:hover .center-img img {
    transform: scale(1.03);
}
.center-name {
    font-size: 17px;
    font-weight: 700;
    color: #1a3a7a;
    text-align: center;
    margin: 0 0 16px 0;
}
.center-points {
    list-style: none;
    padding: 0;
    margin: 0;
}
.center-points li {
    position: relative;
    padding-left: 14px;
    font-size: 13px;
    color: #666;
    line-height: 1.9;
    margin-bottom: 4px;
}
.center-points li::before {
    content: "·";
    position: absolute;
    left: 0;
    color: #1a3a7a;
    font-weight: bold;
    font-size: 16px;
}

/* ===== 专业研发团队 / 核心技术 / 臻选原料 / 专利认证 ===== */
.science-section {
    padding: 60px 15% 0;
    background: #fff;
}
.science-section:last-of-type {
    padding-bottom: 80px;
}
.section-image {
    width: 100%;
}
.section-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}
.section-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.section-grid .grid-item {
    width: 100%;
}
.section-grid .grid-item img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}

/* ===== 移动端响应式（< 992px） ===== */
@media (max-width: 991px) {
    .science-banner {
        height: 480px;
    }
    .science-rd {
        padding: 40px 5% 0;
    }
    .rd-text {
        margin-bottom: 20px;
    }
    .rd-title,
    .section-title {
        font-size: 28px;
    }
    .science-centers {
        padding: 40px 5% 60px;
    }
    .centers-list {
        flex-direction: column;
        gap: 40px;
    }
    .science-section {
        padding: 40px 5% 0;
    }
    .science-section:last-of-type {
        padding-bottom: 60px;
    }
}

@media (max-width: 576px) {
    .rd-title,
    .section-title {
        font-size: 24px;
    }
    .center-name {
        font-size: 15px;
    }
    .center-points li {
        font-size: 13px;
    }
}