body { font-family: "微软雅黑", Arial, sans-serif; margin: 0; background: #f7f9fa; color: #222; }

/* Banner区 */
.banner {
    width: 100%;
    height: 340px;
    overflow: hidden;
    margin-bottom: 0;
    position: relative;
}

.banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-mask {
    background: rgba(44, 108, 162, 0.7);
    color: #fff;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.logo {
    width: 70px; height: 70px; border-radius: 50%; margin-bottom: 10px; background: #fff; object-fit: cover;
}
.banner .slogan {
    font-size: 1.3em;
    margin-top: 10px;
}

nav { background: #1b3a5d; padding: 10px 0; text-align: center; }
nav a { color: #fff; margin: 0 18px; text-decoration: none; font-weight: bold; transition: color 0.2s; }
nav a:hover { text-decoration: underline; color: #ffd700; }

.container { max-width: 1200px; margin: 30px auto; background: none; border-radius: 8px; box-shadow: none; padding: 30px 20px; }

/* 卡片通用样式 */
.card, .card-list > .card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 18px #e0e6ed;
    margin-bottom: 28px;
    padding: 28px 24px;
    transition: box-shadow 0.3s, transform 0.3s;
}
.card:hover {
    box-shadow: 0 8px 32px #b3c6e0;
    transform: translateY(-4px) scale(1.02);
}
.card-list {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 20px;
}

/* 简介区分栏 */
.intro-section {
    display: flex;
    gap: 36px;
    align-items: center;
    margin-bottom: 40px;
}
.intro-img img {
    width: 260px;
    border-radius: 12px;
    box-shadow: 0 2px 8px #ccc;
}
.intro-text { flex: 1; }

/* 研究方向卡片 */
.research-card h3 { margin-top: 0; color: #2d6ca2; }

/* 团队成员卡片 */
.member-list { display: flex; flex-wrap: wrap; gap: 22px; justify-content: flex-start; }
.member-card {
    background: #f2f6fa;
    border-radius: 10px;
    padding: 18px 16px;
    min-width: 140px;
    text-align: center;
    box-shadow: 0 2px 8px #e0e6ed;
    flex: 0 0 160px;
    transition: box-shadow 0.3s, transform 0.3s;
}
.member-card:hover {
    box-shadow: 0 8px 32px #b3c6e0;
    transform: translateY(-4px) scale(1.04);
}
.avatar {
    width: 60px; height: 60px; border-radius: 50%; object-fit: cover; margin-bottom: 8px; background: #fff;
    border: 2px solid #2d6ca2;
}

/* 论文、项目卡片 */
.paper-card, .project-card {
    min-width: 220px;
    flex: 1 1 260px;
    margin-bottom: 0;
}
.paper-title, .project-title { font-weight: bold; margin-bottom: 6px; }
.paper-meta, .project-meta { color: #888; font-size: 0.98em; }

/* 联系我们卡片 */
.contact-card { max-width: 600px; margin: 0 auto 30px auto; text-align: center; }

h2 { color: #2d6ca2; border-left: 5px solid #2d6ca2; padding-left: 10px; margin-top: 0; }

.footer {
    background: #1b3a5d;
    color: #fff;
    text-align: center;
    padding: 18px 0 8px 0;
    margin-top: 40px;
    border-top-left-radius: 16px;
    border-top-right-radius: 16px;
}
.footer-links { margin-bottom: 8px; }
.footer-links a { color: #ffd700; margin: 0 8px; text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }

@media (max-width: 900px) {
    .intro-section { flex-direction: column; gap: 18px; }
    .card-list { flex-direction: column; gap: 18px; }
    .member-list { flex-direction: row; flex-wrap: wrap; gap: 12px; }
}
@media (max-width: 600px) {
    .container { padding: 8px; }
    .intro-img img { width: 100%; max-width: 320px; }
    .member-list { flex-direction: column; align-items: center; }
    .card, .card-list > .card { padding: 16px 8px; }
}

.more-btn {
    display: inline-block;
    padding: 6px 18px;
    margin-top: 10px;
    background: #2d6ca2;
    color: #fff;
    border-radius: 20px;
    text-decoration: none;
    font-size: 1em;
    transition: background 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px #e0e6ed;
}
.more-btn:hover {
    background: #1b3a5d;
    color: #ffd700;
    box-shadow: 0 4px 16px #b3c6e0;
    text-decoration: none;
}

.leader-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    margin-bottom: 0;
}
.leader-card {
    margin: 0 auto;
    background: #f2f6fa;
    border-radius: 10px;
    padding: 28px 40px;
    min-width: 260px;
    text-align: center;
    box-shadow: 0 2px 8px #e0e6ed;
    flex: none;
}
.leader-info {
    margin-top: 10px;
}