/* ============================================
   Academic Homepage Stylesheet
   ============================================ */
   @font-face {
    font-family: "MaoTi";
    src: url("../fonts/maoti.woff2") format("woff2"),
         url("../fonts/maoti.ttf") format("truetype");
    font-display: swap;
}
/* CSS Variables for easy customization */
:root {
    --primary-color: #224b8d;
    --primary-hover: #1a3a6e;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #aaaaaa;
    --background-light: #f8f9fa;
    --background-white: #ffffff;
    --highlight-bg: #fff3cd;
    --max-width: 1000px;
    --nav-height: 50px;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 20px);
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.2;
    color: var(--text-color);
    background-color: var(--background-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

ul {
    list-style-position: inside;
}

/* ============================================
   Navigation Bar
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: var(--primary-color);
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-menu li a {
    display: block;
    padding: 12px 18px;
    color: #ffffff;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.nav-menu li a:hover {
    background-color: rgba(255, 255, 255, 0.15);
    text-decoration: none;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: #ffffff;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-container {
        justify-content: space-between;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        flex-direction: column;
        padding: 10px 0;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li a {
        padding: 12px 20px;
        text-align: center;
    }
}

/* ============================================
   Main Container
   ============================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 20px;
    padding-top: calc(var(--nav-height) + 30px);
}

/* ============================================
   Profile Section
   ============================================ */
.profile-section {
    margin-bottom: 30px;
}

.profile-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 30px;
    align-items: start;
}

.profile-photo img {
    width: 100%;
    max-width: 178px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.profile-info .name {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 5px;
}

.profile-info .name-cn {
    font-size: 2.0rem;
    font-weight: 400;
    color: var(--text-light);
    /* font-family: "Liu Jian Mao Cao", serif;  Google Font - elegant Chinese serif */
    font-family: "MaoTi", cursive;
}

.profile-info .title {
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 10px;
}

.profile-info .affiliation {
    margin-bottom: 10px;
    line-height: 1.8;
}

.profile-info .contact {
    margin-bottom: 15px;
    line-height: 1.8;
}

.profile-info .contact i {
    width: 20px;
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: 50%;
    font-size: 1.1rem;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.social-links a:hover {
    background-color: var(--primary-hover);
    transform: scale(1.1);
    text-decoration: none;
}

@media (max-width: 600px) {
    .profile-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-photo {
        display: flex;
        justify-content: center;
    }

    .profile-photo img {
        max-width: 180px;
    }

    .social-links {
        justify-content: center;
    }
}

/* ============================================
   Sections
   ============================================ */
.section {
    margin-bottom: 30px;  /* Adjust this value to control space between sections */
}

.section:last-child {
    border-bottom: none;
}

.section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.section h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-color);
    margin-top: 20px;
    margin-bottom: 10px;
}

.section p {
    margin-bottom: 15px;
}

.section ul {
    margin-bottom: 15px;
}

.section ul li {
    margin-bottom: 8px;
}

/* Research Interests */
.research-interests {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
    list-style: none;
}

.research-interests li {
    padding: 8px 15px;
    background-color: var(--background-light);
    border-radius: 5px;
    border-left: 3px solid var(--primary-color);
}

/* Highlight Box (e.g., for recruiting notice) */
.highlight-box {
    background-color: var(--highlight-bg);
    padding: 15px 20px;
    border-radius: 5px;
    border-left: 4px solid #ffc107;
    margin-top: 20px;
}

.highlight-box i {
    color: #856404;
    margin-right: 8px;
}

/* ============================================
   News Section
   ============================================ */
.news-list {
    list-style: none;
}

.news-list li {
    padding: 4px 0;
    border-bottom: 1px dashed #ddd;
}

.news-list li:last-child {
    border-bottom: none;
}

.news-date {
    display: inline-block;
    width: 90px;
    font-weight: 600;
    color: var(--primary-color);
}

/* ============================================
   Project Cards
   ============================================ */
.project-card {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 20px;
    padding: 5px;
    margin-bottom: 5px;
    background-color: var(--background-light);
    border-radius: 8px;
    transition: box-shadow 0.2s ease;
}

.project-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-card:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.project-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 5px;
}

.project-content h3 {
    margin-top: 0;
    color: var(--primary-color);
}

.project-links {
    display: flex;
    gap: 10px;
    margin-top: 5px;
    flex-wrap: wrap;
}

.project-links a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: background-color 0.2s ease;
}

.project-links a:hover {
    background-color: var(--primary-hover);
    text-decoration: none;
}

@media (max-width: 600px) {
    .project-card {
        grid-template-columns: 1fr;
    }

    .project-image {
        text-align: center;
    }

    .project-image img {
        max-width: 300px;
    }
}

/* ============================================
   Teaching Section
   ============================================ */
.teaching-list {
    list-style: none;
}

.teaching-list li {
    padding: 10px 15px;
    margin-bottom: 10px;
    background-color: var(--background-light);
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.course-level {
    display: inline-block;
    padding: 3px 10px;
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: 15px;
    font-size: 0.8rem;
}

.badge {
    display: inline-block;
    padding: 3px 10px;
    background-color: #28a745;
    color: #ffffff;
    border-radius: 15px;
    font-size: 0.8rem;
    margin-left: 10px;
}

/* ============================================
   Publications Section
   ============================================ */
.pub-note {
    font-size: 0.95rem;
    color: var(--text-light);
    padding: 10px 15px;
    background-color: var(--background-light);
    border-radius: 5px;
    margin-bottom: 20px;
}

.pub-year {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-color);
    margin-top: 25px;
    margin-bottom: 15px;
    padding-bottom: 5px;
    border-bottom: 2px solid #ddd;
}

.publication-list {
    list-style: none;
}

.publication-item {
    padding: 7px 0;
    border-bottom: 1px dashed #ddd;
}

.publication-item:last-child {
    border-bottom: none;
}

.pub-title {
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 2px;
}

.pub-title a {
    color: var(--text-color);
}

.pub-title a:hover {
    color: var(--primary-color);
}

.pub-authors {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 2px;
}

.pub-venue {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 5px;
}

.venue-highlight {
    display: inline-block;
    padding: 2px 8px;
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: 3px;
    font-weight: 600;
    font-size: 0.85rem;
}

.pub-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.pub-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background-color: #6c757d;
    color: #ffffff;
    border-radius: 3px;
    font-size: 0.85rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.pub-link:hover {
    background-color: #5a6268;
    text-decoration: none;
}

.toggle-btn {
    background-color: #17a2b8;
}

.toggle-btn:hover {
    background-color: #138496;
}

.abstract-box,
.bibtex-box {
    margin-top: 15px;
    padding: 15px;
    background-color: var(--background-light);
    border-radius: 5px;
    border-left: 3px solid var(--primary-color);
}

.abstract-box p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-light);
}

.bibtex-box pre {
    margin: 0;
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'Courier New', Courier, monospace;
}

/* ============================================
   Honors Section
   ============================================ */
.honors-list {
    list-style: none;
}

.honors-list li {
    padding: 4px 0;
    border-bottom: 1px dashed #ddd;
}

.honors-list li:last-child {
    border-bottom: none;
}

.honor-year {
    display: inline-block;
    width: 60px;
    font-weight: 700;
    color: var(--primary-color);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--background-light);
    padding: 30px 20px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

.footer p {
    margin: 5px 0;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* Print Styles */
@media print {
    .navbar,
    .nav-toggle {
        display: none;
    }

    .container {
        padding-top: 0;
    }

    .section {
        page-break-inside: avoid;
    }
}