body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    background: #fff;
    
}

/* 顶部导航 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 40px;
    background-color: #6c735e;
    border-bottom: 1px solid #ddd;
}

.navbar .logo {
    font-size: 23px;
}

.navbar h1 {
    color: #eeeeee;
    font-weight: bold;
}


.navbar nav a {
    margin-left: 20px;
    font-size: 20px;
    text-decoration: none;
    color: #eeeeee;
    font-weight: bold;
}


.navbar nav a:hover {
    color: #f7f6bb; /* 淡黄色 hover */
}

.menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.menu li {
    position: relative; /* 让子菜单相对定位 */
    margin-right: 20px;
}

.menu a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
}

/* 子菜单默认隐藏 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    border: 1px solid #ddd;
    list-style: none;
    padding: 10px 0;
    min-width: 120px;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.dropdown-menu li {
    padding: 8px 0px;
}

.dropdown-menu li a {
    color: #3e642c;
    font-size: 18px;
}

/* 悬停显示子菜单 */
.dropdown-menu {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    color: #333;
    background-color: #e5e3e3;
    border-radius: 4px;
}

.container {
  display: flex;
  max-width: 1500px;
  margin: 20px auto;
  gap: 40px;
  padding: 0 20px; /* 添加左右 padding，推荐用 padding 而不是 margin-left/right */
}

/* 左侧栏模块化增强 */
.sidebar {
    width: 300px;
    text-align: center;
    background-color: #f2f2f2;
    padding: 40px 15px; /* 减小 padding，让布局更紧凑 */
    border-radius: 5px; /* 让左侧整体有圆角 */
}

/* 头像 */
.avatar {
    width: 150px;
    height: auto;
    border-radius: 60%;
    object-fit: cover;
    margin-bottom: 15px;
}

/* 联系信息列表 */
.sidebar .contact {
    margin-top: 30px;
    text-align: left;
    margin-left: 50px;
}

/* 默认行距 */
.sidebar .contact li {
    margin-bottom: 50px;
    line-height: 1.6;
    font-size: 15px;
}

/* personalinfo 模块紧凑 */
.sidebar .contact li.personalinfo {
    margin-top: 4px;
    margin-bottom: 8px;
}

/* social 模块紧凑 */
.sidebar .contact li.social {
    margin-top: 10px;
    margin-bottom: 4px;
}

/* 模块之间的视觉分隔（加分割线） */
.sidebar .contact li.social:first-of-type {
    margin-top: 30px; /* 模块之间大一点 */
}

/* 去掉列表符号 */
.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* 链接美化 */
.sidebar .contact li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    transition: color 0.3s;
}

.sidebar .contact li a:hover {
    color: #6c735e; /* 深绿色 hover */
}


/* 右侧内容 */
.content {
    flex: 1;
}

.content section {
    margin-bottom: 30px;
}

.content h2 {
    margin-bottom: 10px;
    font-size: 24px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 5px;
}

#publications ul li {
    margin-bottom: 15px; /* 每条之间的距离 */
    line-height: 1.6;    /* 行距，控制文本的紧凑度 */
}



/* Research 卡片样式（仅作用于该 section） */
#research .research-list{
display:flex;
flex-direction:column;
gap:28px;
margin-top:16px;
}
#research .research-item{
display:flex;
gap:24px;
align-items:flex-start;
padding:16px 0;
border-top:1px solid var(--border, #eee);
}
#research .research-item:first-child{ border-top:none; }

#research .thumb{
display:block;
flex:0 0 300px;           /* 左侧图宽度 */
max-width:300px;
}
#research .thumb img{
width:100%;
height:160px;             /* 近似截图比例 */
object-fit:cover;
border-radius:12px;
box-shadow:0 6px 16px rgba(0,0,0,.08);
}

#research .meta{ flex:1; }
#research .title{
margin:0 0 8px 0;
font-size:22px;
line-height:1.25;
font-weight:700;
}
#research .teaser{
margin:0;
color:#666;               /* 灰色简介 */
font-size:16px;
line-height:1.6;
}

/* 响应式：窄屏改为上下布局 */
@media (max-width: 900px){
#research .research-item{
    flex-direction:column;
}
#research .thumb{
    width:100%;
    flex:unset;
}
#research .thumb img{
    height:180px;
}
}