body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6;
    color: #333;
}



header {
    text-align: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid #2980b9; /* 绿色主题色 */
}

#page-title {
    color: black; /* 深绿色 */
    font-weight: bold;
    font-size: 2.5em;
}

.image-container {
    margin: 0 0 25px 0; /* 移除左右margin，让图片撑满或按CSS控制 */
    text-align: center;
}

#item-image {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 10px;
}

#image-caption {
    font-size: 0.9em;
    color: #666;
    font-style: italic;
}

#item-text-content h2 {
    color: black; /* 中绿色 */
    margin-top: 20px;
    margin-bottom: 10px;
    padding-bottom: 5px;
    border-bottom: 1px solid#2980b9; /* 浅绿色下划线 */
}

#item-text-content p {
    margin-bottom: 15px;
    text-align: justify; /* 两端对齐 */
}

#item-text-content ul {
    list-style-type: disc; /* 或 'circle', 'square' */
    margin-left: 20px; /* 添加内边距 */
    padding-left: 20px; /* 确保项目符号可见 */
    margin-bottom: 15px;
}

#item-text-content li {
    margin-bottom: 8px;
}

/*footer {*/
/*    text-align: center;*/
/*    margin-top: 30px;*/
/*    padding-top: 15px;*/
/*    border-top: 1px solid #2980b9;*/
/*    font-size: 0.9em;*/
/*    color: #777;*/
/*}*/

/* 响应式设计：针对小屏幕 */
@media (max-width: 768px) {
    .container {
        margin: 15px;
        padding: 15px;
    }

    #page-title {
        font-size: 2em;
    }

    #item-text-content h2 {
        font-size: 1.4em;
    }
}

     /* 侧边栏导航美化 */
 .sidebar-nav {
     border-radius: 8px 0 8px 0;
     overflow: hidden;
     background-color: #ffffff;

     padding: 25px 20px;
     position: relative;
     /*border-top: 6px solid #3cb371 !important;*/
     border-left: 6px solid #4ca2cd !important;
     border-bottom: 6px solid #3cb371;
     border-right: 6px solid #4ca2cd;
     transition: all 0.3s ease;
     margin-top: 15px;
 }

.widget-title {
    position: relative;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e9e9e9;
}

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

.sidebar-menu li {
    position: relative;
    transition: all 0.3s ease;
    border-top: 2px solid transparent;
    margin-bottom: 5px;
}

.sidebar-menu li a {
    display: block;
    padding: 12px 10px;
    color: #333;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.sidebar-menu li:hover {
    border-top: 2px solid #2980b9;
    transform: translateX(10px);
}

.sidebar-menu li:hover a {
    background-color: rgb(33 28 28 / 5%);

    color: #2980b9;
}

.sidebar-menu li a i {
    margin-right: 10px;
    color: #2980b9;
    transition: transform 0.3s ease;
}

.sidebar-menu li:hover a i {
    transform: translateX(5px);
}

/* 活动状态样式 */
.sidebar-menu li.active {
    border-top: 2px solid #2980b9;
    transform: translateX(10px);
}

.sidebar-menu li.active a {
    background-color: rgb(33 28 28 / 5%);
    color: #2980b9;
    font-weight: 600;
}

.sidebar-menu li.active a i {
    transform: translateX(5px);
}

/* 论文搜索区样式 */
.search-section {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    margin-bottom: 30px;
    overflow: hidden;
}

.search-container {
    padding: 25px;
}

.search-title {
    font-size: 22px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #2980b9;
    position: relative;
}

.search-title:after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 2px;
    background: #2980b9;
}

.search-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input {
    width: 100%;
    color: black;
    padding: 12px 15px;
    border: 1px solid #e1e1e1;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-group input:focus {
    border-color: #2980b9;
    box-shadow: 0 0 0 2px rgba(145, 165, 56, 0.2);
    outline: none;
}

.year-group {
    grid-column: span 2;
}

.year-inputs {
    display: flex;
    align-items: center;
}

.year-inputs input {
    width: calc(50% - 20px);
}

.year-separator {
    margin: 0 15px;
    color: #666;
    font-weight: 500;
}

.search-button-wrapper {
    display: flex;
    justify-content: center;
    gap: 15px;
}

#searchButton, .reset-btn {
    height: 50px;
    padding: 12px 25px;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

#searchButton {
    background-color: #2980b9;
    color: #fff;
}

#searchButton:hover {
    background-color: #7a8c2c;
    box-shadow: 0 5px 15px rgba(145, 165, 56, 0.3);
}

.reset-btn {
    background-color: #f1f1f1;
    color: #555;
}

.reset-btn:hover {
    background-color: #e1e1e1;
}

@media (max-width: 768px) {
    .search-grid {
        grid-template-columns: 1fr;
    }

    .year-group {
        grid-column: span 1;
    }
}


     /* 面包屑导航 */
 .breadcrumb {
     padding: 15px 0;
     margin-bottom: 30px;
 }

.breadcrumb ul {
    display: flex;
    list-style: none;
}

.breadcrumb li {
    margin-right: 10px;
    font-size: 14px;
    color: #666;
}

.breadcrumb li:after {
    content: '>';
    margin-left: 10px;
    color: #999;
}

.breadcrumb li:last-child:after {
    content: '';
}

.breadcrumb a {
    color: #2980b9;
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: #2980b9;
    text-decoration: underline;
}

/* 内容区块样式 */
.content-block {
    background-color: #fff;
    padding: 30px 30px 0 30px;
    border-radius: 8px;
    /*box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);*/
    /* margin-bottom: 30px; */
    transition: all 0.3s ease;
}

.content-header {
    margin-bottom: 25px;
    position: relative;
}

.section-title {
    font-size: 28px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 15px;
}

.section-line {
    height: 3px;
    width: 80px;
    /*background: linear-gradient(90deg, #3cb371, #4ca2cd);*/
    background: #2980b9;
    margin-bottom: 20px;
}

.content-body {
    font-size: 16px;
    line-height: 1.8;
    color: #444;
}

.content-body img {
    height: 240px;
    width: 360px;
    object-fit: cover;
}

.content-body p {
    margin-bottom: 20px;
}

.research-areas li,
.team-structure li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.research-areas li:before,
.team-structure li:before {
    content: '?';
    color: #3cb371;
    font-size: 20px;
    position: absolute;
    left: 0;
    top: -2px;
}

.leader-title {
    color: #666;
    font-style: italic;
    margin-bottom: 15px;
}

.team-card {
    text-align: center;
    padding: 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
    background-color: #f9f9f9;
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.team-card img {
    margin-bottom: 15px;
    height: 240px;
    width: 360px;
    object-fit: cover;
}

.team-card h4 {
    margin-bottom: 5px;
    color: #2c3e50;
}

.team-card p {
    color: #666;
    font-style: italic;
    margin-bottom: 0;
}

.content-header {
    position: relative;
    display: inline-block;
}

.section-title {
    margin-bottom: 5px;
    display: inline-block;
}

.section-line {
    height: 3px;
    background-color: #3498db;
    width: 100%;
    margin-bottom: 15px;
}