/* research.css */

/* --- 四、CSS作用域 --- */
.research-page,
.research-page * {
    box-sizing: border-box;
}

.research-page {
    /* --- 三、页面整体风格 - 配色 --- */
    --brand-purple: #182987;
    --dark-purple: #67386D;
    --bg-light: #F6F6F6;
    --title-color: #444444;
    --text-color: #666666;
    --muted-color: #999999;
    --white: #FFFFFF;

    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-color);
    background-color: var(--white);
    line-height: 1.5;
}

/* --- 五、主体宽度 --- */
.research-page .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 30px;
}

/* --- 公用样式 --- */
.research-page .section-title {
    font-size: 34px;
    font-weight: 400;
    color: var(--title-color);
    margin: 0 0 20px;
}

.research-page .section-title.center {
    text-align: center;
}

.research-page .section-title.center::before {
    content: "";
    display: block;
    width: 30px;
    height: 2px;
    background-color: var(--brand-purple);
    margin: 0 auto 15px;
}

.research-page .more-wrap {
    margin-top: 40px;
    text-align: center;
}

.research-page .more-link {
    font-size: 15px;
    color: var(--brand-purple);
    text-decoration: none;
    display: inline-block;
    transition: transform 0.3s ease;
}

.research-page .more-link:hover {
    transform: translateX(5px);
}

.research-page .more-link-white {
    color: var(--white);
}

/* --- 图片区域通用 --- */
.research-page .image-wrap {
    width: 100%;
    overflow: hidden;
    background: #eeeeee;
}

.research-page .image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* --- 十六、图片加载过渡 --- */
.research-page .lazy-image {
    opacity: 0;
    transform: scale(1.015);
    transition: opacity 0.5s ease, transform 0.6s ease;
}

.research-page .lazy-image.is-loaded {
    opacity: 1;
    transform: scale(1);
}

/* --- 三十三、页面滚动进入动画 --- */
.research-page .reveal {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.research-page .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 六、第一模块：科研数据统计 --- */
.research-page .research-stats {
    background: var(--white);
    padding: 55px 0;
}

.research-page .stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.research-page .stat-item {
    text-align: center;
}

.research-page .stat-number {
    font-size: 58px;
    font-weight: 300;
    color: var(--brand-purple);
    line-height: 1;
    margin-bottom: 15px;
}

.research-page .stat-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 10px;
}

.research-page .stat-desc {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-color);
    margin: 0;
}

/* --- 八、第二模块：科研概览 --- */
.research-page .research-overview {
    background: var(--white);
    padding: 90px 0;
}

.research-page .research-overview .section-title {
    font-size: 38px;
}

.research-page .overview-text {
    max-width: 900px;
    margin: 45px auto 0;
    font-size: 17px;
    line-height: 2;
    color: var(--text-color);
    text-align: center;
}

/* --- 十、第三模块：研究领域 --- */
.research-page .research-fields {
    background: var(--white);
    padding: 60px 0;
}

.research-page .fields-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px 25px;
    margin-top: 45px;
}

.research-page .field-card {
    background: #F5F5F5;
    text-align: center;
}

.research-page .field-card .image-wrap {
    aspect-ratio: 16 / 9;
}

.research-page .field-title {
    font-size: 17px;
    font-weight: 600;
    color: #222222;
    margin: 25px 0 15px;
    transition: color 0.3s ease;
}

.research-page .field-desc {
    font-size: 14px;
    line-height: 1.8;
    color: #555555;
    padding: 0 20px 25px;
    margin: 0;
}

/* 二十、研究领域 Hover */
.research-page .field-card:hover .image-wrap img {
    transform: scale(1.03);
}

.research-page .field-card:hover .field-title {
    color: var(--brand-purple);
}

/* --- 二十一、第四模块：科研动态 --- */
.research-page .research-news {
    background: #182987;
    padding: 60px 0 70px;
}

.research-page .news-title {
    color: var(--white);
}

.research-page .research-news .section-title.center::before {
    background-color: var(--white);
}

.research-page .news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
    margin-top: 45px;
}

.research-page .news-card {
    background: var(--white);
}

.research-page .news-card .image-wrap {
    aspect-ratio: 16 / 9;
}

.research-page .news-heading {
    font-size: 16px;
    line-height: 1.7;
    color: #333333;
    margin: 20px 20px 10px;
}

.research-page .news-date {
    font-size: 14px;
    color: var(--muted-color);
    text-align: center;
    margin: 0 20px 20px;
}

/* --- 二十七、第五模块：研究所和实验室 --- */
.research-page .research-labs {
    background: var(--white);
    padding: 80px 0 100px;
}

.research-page .labs-grid {
    display: grid;
    grid-template-columns: 55% 45%;
    gap: 40px;
    align-items: center;
    min-height: 430px;
}

.research-page .labs-media .image-wrap {
    height: 100%;
    min-height: 430px;
}

.research-page .labs-title {
    font-size: 32px;
    font-weight: 400;
    color: var(--title-color);
    margin: 0 0 25px;
}

.research-page .labs-desc {
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-color);
    margin: 0 0 25px;
}

.research-page .labs-list {
    margin: 0;
    padding: 0;
}

.research-page .labs-list div {
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-color);
    margin-bottom: 5px;
}

/* --- 三十九、响应式 --- */

/* 768～1199px */
@media screen and (max-width: 1199px) and (min-width: 768px) {
    .research-page .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
    
    .research-page .fields-grid,
    .research-page .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .research-page .labs-grid {
        grid-template-columns: 50% 50%;
        gap: 30px;
    }
}

/* 小于768px */
@media screen and (max-width: 767px) {
    .research-page .stats-grid,
    .research-page .fields-grid,
    .research-page .news-grid,
    .research-page .labs-grid {
        grid-template-columns: 1fr;
    }
    
    .research-page .labs-media .image-wrap {
        min-height: auto;
        aspect-ratio: 16 / 9;
    }
    
    .research-page .stats-grid {
        gap: 40px;
    }
}

/* --- 三十五、prefers-reduced-motion --- */
@media (prefers-reduced-motion: reduce) {
    .research-page .reveal,
    .research-page .lazy-image {
        transition: none !important;
        transform: none !important;
    }
}