/* Global Styles */
:root {
    --primary-color: #333;
    --secondary-color: #555;
    --accent-color: #cc0000;
    --text-color: #333;
    --light-text: #f4f4f4;
    --background-color: #fff;
    --section-bg: #f9f9f9;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Baskerville', serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: #cc0000;
    transition: color 0.3s ease;
}

a:hover {
    color: #800000;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--accent-color);
    color: var(--light-text);
    border: none;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn:hover {
    background-color: var(--primary-color);
    color: var(--light-text);
}

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

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

/* Header Styles - Simplified */
header {
    padding: 60px 0 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 5px;
    letter-spacing: 0.5px;
}

header p {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--secondary-color);
}

/* Navigation Styles - Simplified */
nav {
    padding: 15px 0;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: var(--text-color);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

nav ul li a:hover {
    color: var(--accent-color);
}

nav ul li a:hover::after {
    width: 100%;
}

/* Profile Section */
.profile-section {
    display: flex;
    align-items: flex-start;
    gap: 50px;
    margin-bottom: 60px;
}

.profile-image {
    flex: 0 0 300px;
    text-align: center;
}

.profile-img {
    width: 250px;
    height: 250px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 15px;
}

.profile-name {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.profile-title {
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.profile-institution {
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.cv-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 3px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.cv-button:hover {
    background-color: var(--primary-color);
}

.cv-button i {
    font-size: 1.2rem;
}

.profile-content {
    flex: 1;
}

.biography-title {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.biography-text {
    margin-bottom: 25px;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Two Column Layout */
.two-column {
    display: flex;
    gap: 30px;
    margin-bottom: 60px;
}

.column {
    flex: 1;
}

.section-title {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--primary-color);
}

/* Interests Section */
.interests-list {
    list-style: none;
}

.interests-list li {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
}

.interests-list li::before {
    content: '•';
    color: var(--accent-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-right: 5px;
}

/* Education Section */
.education-item {
    margin-bottom: 25px;
}

.education-icon {
    color: var(--accent-color);
    margin-right: 10px;
}

.education-degree {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.education-institution {
    color: var(--secondary-color);
    font-size: 0.95rem;
    margin-bottom: 5px;
}

/* Research Section */
.research-section {
    margin-bottom: 40px;
}

.research-section h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.4rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.research-item {
    margin-bottom: 25px;
    padding-left: 15px;
    border-left: 2px solid var(--accent-color);
}

.research-item h4 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.research-item p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 8px;
}

.research-interests {
    list-style-type: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.research-interests li {
    background-color: #f0f0f0;
    color: var(--text-color);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    display: inline-block;
    transition: all 0.3s ease;
}

.research-interests li:hover {
    background-color: var(--accent-color);
    color: white;
}

/* News Section */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 0 auto;
    max-width: 1200px;
}

.news-item {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.news-item-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.news-item-content {
    padding: 25px;
}

.news-item h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
    font-weight: 600;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
    display: inline-block;
}

.news-item p {
    margin-bottom: 20px;
    color: var(--text-color);
    font-size: 1.05rem;
    line-height: 1.6;
}

.news-item .btn {
    background-color: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    padding: 8px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 5px;
}

.news-item .btn:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateY(-2px);
}

/* Contact Section */
.contact-content {
    margin: 0 auto;
    max-width: 600px;
}

.contact-info {
    background-color: var(--section-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    width: 100%;
}

.contact-info p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
}

.contact-info p i {
    margin-right: 15px;
    color: var(--accent-color);
    font-size: 1.4rem;
    width: 25px;
    text-align: center;
}

.contact-label {
    font-weight: 600;
    margin-right: 8px;
    min-width: 80px;
    display: inline-block;
}

/* Footer Styles */
footer {
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 60px;
}

.social-links {
    margin: 20px 0;
}

.social-links a {
    display: inline-block;
    margin: 0 10px;
    color: var(--secondary-color);
    font-size: 1.4rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-color);
}

.photo-credit {
    font-size: 0.8rem;
    font-style: italic;
    margin-top: 10px;
    opacity: 0.7;
}

.photo-credit-inline {
    font-size: 0.8rem;
    font-style: italic;
    text-align: center;
    margin-top: 5px;
    opacity: 0.7;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .profile-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .profile-content {
        text-align: left;
    }
    
    .two-column {
        flex-direction: column;
    }
    
    .contact-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    header {
        padding: 40px 0 20px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .biography-title {
        font-size: 1.8rem;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .profile-img {
        width: 200px;
        height: 200px;
    }
    
    .profile-name {
        font-size: 1.6rem;
    }
}

/* Active Navigation Link */
nav ul li a.active {
    color: var(--accent-color);
}

nav ul li a.active::after {
    width: 100%;
}

/* Section Dividers */
.section-divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--accent-color), transparent);
    margin: 40px 0;
    opacity: 0.3;
} 
/* Updates feed in biography */
.updates-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-top: 30px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.updates-title {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin: 0;
}

.updates-stamp {
    font-size: 0.85rem;
    color: var(--secondary-color);
    white-space: nowrap;
}

.updates-box {
    position: relative;
    max-height: 170px;
    overflow-y: scroll;
    padding: 12px 14px 4px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--section-bg);
    scrollbar-width: thin;
    scrollbar-color: #b0b0b0 #ececec;
    transition: max-height 0.35s ease;
}

.updates-box.expanded {
    max-height: 1000px;
    overflow-y: auto;
}

/* Always-visible scrollbar (overrides macOS overlay scrollbars in WebKit/Blink) */
.updates-box::-webkit-scrollbar {
    width: 8px;
}

.updates-box::-webkit-scrollbar-track {
    background: #ececec;
    border-radius: 4px;
}

.updates-box::-webkit-scrollbar-thumb {
    background: #b0b0b0;
    border-radius: 4px;
}

.updates-box::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

.updates-list {
    list-style-type: none;
    padding-left: 0;
    margin: 0;
}

.updates-list li {
    padding-left: 15px;
    border-left: 2px solid var(--accent-color);
    margin-bottom: 12px;
    font-size: 1rem;
    line-height: 1.6;
}

.updates-list li:last-child {
    margin-bottom: 4px;
}

.update-date {
    display: inline-block;
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.75rem;
    color: var(--secondary-color);
    background-color: var(--section-bg);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 1px 6px;
    margin-right: 8px;
    vertical-align: 1px;
}

.updates-toggle {
    -webkit-appearance: none;
    appearance: none;
    display: inline-block;
    margin-top: 10px;
    background: transparent;
    border: 0;
    outline: 0;
    box-shadow: none;
    border-radius: 0;
    padding: 0;
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--accent-color);
    cursor: pointer;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.updates-toggle:hover,
.updates-toggle:focus-visible {
    color: #800000;
    border-bottom-color: #800000;
}

.updates-toggle i {
    font-size: 0.75rem;
    margin-left: 4px;
}

/* Figure 1 / Table 1 summary block */
.summary-section {
    padding: 10px 0 0;
}

.summary-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 50px;
    align-items: start;
}

.summary-figure {
    margin: 0;
    min-width: 0;
}

.summary-figure figcaption,
.table-caption {
    font-size: 1.05rem;
    margin-bottom: 14px;
    color: var(--text-color);
}

.sc {
    font-variant: small-caps;
    letter-spacing: 0.06em;
    font-weight: 700;
}

.fig-svg {
    width: 100%;
    height: auto;
    display: block;
}

.fig-notes {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--secondary-color);
    margin-top: 12px;
}

.summary-table table {
    width: 100%;
    border-collapse: collapse;
    border-top: 1.5px solid var(--primary-color);
    border-bottom: 1.5px solid var(--primary-color);
}

.summary-table th {
    text-align: left;
    padding: 8px 10px 8px 0;
    border-bottom: 1px solid var(--primary-color);
    font-weight: 700;
}

.summary-table td {
    padding: 9px 10px 9px 0;
    vertical-align: top;
    font-size: 1rem;
}

.summary-table code {
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.85rem;
    color: var(--secondary-color);
}

.summary-table sup, .summary-table sub {
    font-size: 0.7em;
}

@media (max-width: 900px) {
    .summary-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* CV link on the About Me page */
.cv-line {
    margin: -8px 0 28px;
}

/* Code blocks */
.code-block {
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    background-color: var(--section-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    border-radius: 4px;
    padding: 12px 16px;
    margin: 10px 0 4px;
    overflow-x: auto;
    white-space: pre;
}

.research-item p code {
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.9em;
    background-color: var(--section-bg);
    padding: 1px 5px;
    border-radius: 3px;
}

/* Secondary affiliation line */
.profile-affiliation,
.header-affiliation {
    font-size: 0.95rem;
    opacity: 0.85;
}

.profile-institution + .profile-affiliation {
    margin-top: -14px;
}

/* Research keyword tags */
.keywords {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 0 0 14px;
}

.keywords li {
    font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    border-radius: 3px;
    padding: 2px 9px;
}

/* On my name */
.name-note {
    max-width: 760px;
}

.name-note p {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 14px;
}

.name-note blockquote {
    margin: 14px 0 14px 0;
    padding: 10px 18px;
    border-left: 3px solid var(--accent-color);
    background-color: var(--section-bg);
    font-size: 1.05rem;
    line-height: 1.8;
}

.name-note blockquote[lang="zh"] {
    font-family: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", serif;
    font-size: 1.15rem;
}

.name-note cite {
    display: block;
    font-style: normal;
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-top: 6px;
}

[lang="zh"] {
    font-family: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", serif;
}