:root {
    --primary-color: #1a3a6c;    /* 深蓝色 - 学术专业感 */
    --secondary-color: #2c5f2d;  /* 深绿色 - 心理学/教育关联 */
    --accent-color: #8e44ad;     /* 紫色 - 数据科学/AI元素 */
    --light-bg: #f8f9fa;
    --card-shadow: 0 4px 12px rgba(0,0,0,0.08);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    background-image: linear-gradient(rgba(250, 250, 250, 0.9), rgba(250, 250, 250, 0.9)), 
                      url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%23f8f9fa"/><path d="M0 50 L100 50 M50 0 L50 100" stroke="%23e9ecef" stroke-width="0.5"/></svg>');
    background-size: 40px 40px;
}

header {
    text-align: center;
    padding: 50px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    transform: rotate(30deg);
}

.lang-toggle {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    backdrop-filter: blur(5px);
    transition: var(--transition);
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 6px;
}

.lang-toggle:hover {
    background: rgba(255,255,255,0.3);
}

.lang-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #2ecc71;
    margin-left: 8px;
}

.profile-img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: contain; /* 更改为contain以避免拉伸 */
    border: 5px solid rgba(255,255,255,0.3);
    margin: 0 auto 25px;
    display: block;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    position: relative;
    z-index: 2;
    /* 添加最小尺寸限制以防止过度压缩 */
    min-width: 120px;
    min-height: 120px;
}

h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    position: relative;
    z-index: 2;
}

.tagline {
    font-size: 1.4rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto 20px;
    font-weight: 300;
    position: relative;
    z-index: 2;
}

.academic-title {
    background: rgba(255,255,255,0.2);
    display: inline-block;
    padding: 5px 20px;
    border-radius: 30px;
    margin-top: 10px;
    backdrop-filter: blur(5px);
    position: relative;
    z-index: 2;
}

.container {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 900px) {
    .container {
        grid-template-columns: 1fr;
    }
}

main {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

section:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--primary-color);
}

.research-section::before {
    background: var(--secondary-color);
}

.software-section::before {
    background: var(--accent-color);
}

.publications-section::before {
    background: #e67e22;
}

.projects-section::before {
    background: #3498db;
}

h2 {
    color: var(--primary-color);
    padding-bottom: 12px;
    margin-bottom: 25px;
    font-size: 1.9rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

h2 i {
    color: var(--secondary-color);
}

.research-section h2 i {
    color: var(--secondary-color);
}

.software-section h2 i {
    color: var(--accent-color);
}

.publications-section h2 i {
    color: #e67e22;
}

.projects-section h2 i {
    color: #3498db;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.research-area {
    padding: 20px;
    border-radius: 10px;
    background: var(--light-bg);
    border-left: 3px solid var(--secondary-color);
    transition: var(--transition);
}

.research-area:hover {
    transform: translateX(5px);
    background: #eef7ff;
}

.research-area h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.software-card {
    border: 1px solid #e0e6ef;
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.software-card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 5px 15px rgba(142, 68, 173, 0.2);
}

.software-img {
    height: 160px;
    background: linear-gradient(45deg, #3498db, #8e44ad);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3.5rem;
    font-weight: bold;
    /* 为图像容器添加更好的比例控制 */
    display: flex;
    align-items: center;
    justify-content: center;
}

.software-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.software-content h3 {
    color: var(--accent-color);
    margin-bottom: 10px;
}

.software-links {
    margin-top: auto;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.paper-item {
    padding: 18px;
    border-bottom: 1px dashed #ddd;
    line-height: 1.8;
    display: none;
}

.paper-item.visible {
    display: block;
}

.paper-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 5px;
    font-style: normal;
}

.paper-authors {
    font-style: normal;
    margin-bottom: 8px;
    line-height: 1.5;
    color: #444;
}

.paper-journal {
    font-style: italic;
    font-weight: 500;
    color: var(--secondary-color);
    margin: 5px 0;
}

.paper-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 8px;
    font-size: 0.9rem;
    color: #666;
}

.paper-link {
    color: var(--primary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
    margin-right: 15px;
    font-size: 0.95rem;
}

.paper-link:hover {
    color: var(--accent-color);
}

.doi-link {
    color: #1a0dab;
    font-family: monospace;
    word-break: break-all;
}

aside {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.profile-card {
    text-align: center;
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--card-shadow);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.contact-icon {
    width: 30px;
    height: 30px;
    background: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--primary-color);
}

.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.skill-tag {
    background: var(--light-bg);
    color: var(--primary-color);
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 10px 22px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    margin-top: 10px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
    text-align: center;
}

.btn:hover {
    background: #0d2a59;
    transform: translateY(-2px);
}

.btn-accent {
    background: var(--accent-color);
}

.btn-accent:hover {
    background: #7d3c98;
}

.btn-block {
    display: block;
    width: 100%;
}

footer {
    text-align: center;
    padding: 25px;
    color: #666;
    font-size: 0.95rem;
    margin-top: 20px;
    border-top: 1px solid #eee;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--card-shadow);
    text-align: center;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 10px 0;
}

.research-highlight {
    background: linear-gradient(135deg, rgba(44, 95, 45, 0.08), rgba(44, 95, 45, 0.03));
    border-radius: 10px;
    padding: 30px;
    margin: 25px 0;
    border-left: 3px solid var(--secondary-color);
}

.highlight-title {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.apa-chinese {
    display: block;
}

.apa-english {
    display: none;
    font-family: 'Times New Roman', Times, serif;
}

.project-card {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 3px solid #3498db;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.08);
}

.project-title {
    font-weight: 600;
    color: #2980b9;
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.project-meta {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.project-description {
    margin-top: 12px;
    line-height: 1.7;
}

.contrib-details {
    font-style: italic;
    color: #555;
    margin: 8px 0;
    padding-left: 10px;
    border-left: 2px solid #ddd;
}

.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 15px;
}

.software-item {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    border: 1px solid #e9ecef;
    transition: var(--transition);
    display: none; /* 默认隐藏 */
}

.software-item.visible {
    display: block; /* 可见时显示 */
}

.software-name {
    font-weight: 600;
    color: var(--accent-color);
    font-size: 1.2rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.software-meta {
    color: #666;
    font-size: 0.95rem;
    margin: 5px 0;
}

.software-description {
    margin-top: 12px;
    line-height: 1.6;
}

.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.badge {
    background: rgba(142, 68, 173, 0.1);
    color: var(--accent-color);
    padding: 3px 10px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
}

@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    h1 {
        font-size: 2.2rem;
    }
    .tagline {
        font-size: 1.1rem;
    }
    section {
        padding: 20px;
    }
    .container {
        gap: 20px;
    }
    .lang-toggle {
        position: relative;
        top: auto;
        right: auto;
        margin-bottom: 15px;
        align-self: flex-end;
    }
    .button-container {
        flex-direction: column;
        align-items: stretch;
    }
    .btn {
        width: 100%;
        margin: 5px 0;
    }
    .profile-img {
        width: 150px;
        height: 150px;
    }
}

.view-all-btn {
    display: block;
    text-align: center;
    margin-top: 15px;
}

.hidden {
    display: none;
}

.button-container {
    display: flex;
    justify-content: center;
    margin-top: 15px;
    gap: 10px;
}

/* 搜索容器样式 - 将搜索框和年份选择放在同一行 */
.search-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#publicationSearch, #softwareSearch {
    flex: 3;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 0.95rem;
}

#yearFilter {
    flex: 1;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 0.95rem;
    background-color: white;
}

@media (max-width: 768px) {
    .search-container {
        flex-direction: column;
    }
    
    #publicationSearch, #softwareSearch, #yearFilter {
        width: 100%;
        flex: none;
    }
}

/* 浮动联系按钮 */
.contact-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 1000;
    transition: var(--transition);
}

.contact-float:hover {
    transform: scale(1.1);
    background: var(--accent-color);
}

/* 联系弹窗 */
.contact-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.contact-modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    padding: 25px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
}

.close-modal:hover {
    color: var(--primary-color);
}

#statsChart {
    width: 100% !important;
    height: 300px !important;
    max-width: 300px;
    margin: 15px auto 0 auto;
    display: block;
}

.stat-card canvas {
    width: 100% !important;
    height: 250px !important;
    max-width: 300px;
    margin: 0 auto;
    display: block;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--card-shadow);
    text-align: center;
    min-height: 400px;
}

.image-container {
    position: relative;
    overflow: hidden;
    border-radius: 50%;
    width: 180px;
    height: 180px;
    margin: 0 auto 25px;
    display: block;
    border: 5px solid rgba(255,255,255,0.3);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    position: relative;
    z-index: 2;
    min-width: 120px;
    min-height: 120px;
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}