/* Global style reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Root element variables - Green theme */
:root {
    --primary-color: #059669;
    --secondary-color: #047857;
    --accent-color: #10b981;
    --light-green: #d1fae5;
    --extra-light-green: #f0fdf4;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --background-light: #fafaf9;
    --background-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 2px 4px -1px rgba(5, 150, 105, 0.08);
    --shadow-lg: 0 6px 12px -2px rgba(5, 150, 105, 0.12);
    --shadow-hover: 0 4px 12px -3px rgba(5, 150, 105, 0.15);
    --border-radius: 0.5rem;
    --transition: all 0.2s ease;
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-light: linear-gradient(135deg, var(--extra-light-green), var(--light-green));
}

/* Base styles */
body {
    font-family: 'Roboto', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation bar styles */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 3.5rem;
}

.nav-logo h2 {
    color: var(--primary-color);
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* Home section styles */
.hero {
    margin-top: 3.5rem;
    padding: 2rem 0;
    background: var(--background-white);
    position: relative;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
    z-index: 1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

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

.profile-img {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.profile-img:hover {
    transform: scale(1.02);
}

/* Hero contact styles */
.hero-contact {
    margin-top: 1.5rem;
    text-align: left;
}

.contact-info {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.contact-separator {
    color: var(--text-muted);
    font-weight: 300;
}

.contact-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition);
}

.contact-link:hover {
    color: var(--primary-color);
}

.contact-link i {
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* Simple link styles */
.simple-link {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid var(--primary-color);
    transition: var(--transition);
}

.simple-link:hover {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

/* General section styles */
section {
    padding: 2rem 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: left;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* Unified item styles */
.item {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1rem;
    padding: 1.25rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--border-color);
}

.item-period {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 90px;
    flex-shrink: 0;
    padding: 0.375rem 0.75rem;
    background: var(--background-light);
    border-radius: var(--border-radius);
    text-align: center;
    height: fit-content;
    border: 1px solid var(--border-color);
}

.item-content {
    flex: 1;
}

.item-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
}

.item-content h4 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.item-content p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.375rem;
}

/* 关于我部分样式 */
.about {
    background-color: var(--background-light);
}

.about-content {
    max-width: none;
}

.about-text p {
    margin-bottom: 1rem;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 1rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.about-text p:hover {
    box-shadow: var(--shadow-hover);
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-text a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.about-text a:hover {
    border-bottom-color: var(--primary-color);
}

.education {
    margin-top: 2rem;
}

.education h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.education-item {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.edu-degree {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.edu-institution {
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.edu-year {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.stat-item {
    text-align: left;
    padding: 1.5rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.stat-item:hover {
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* 研究领域部分样式 */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.research-item {
    text-align: left;
    padding: 2rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.research-item:hover {
    box-shadow: var(--shadow-lg);
}

.research-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: left;
}

.research-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.research-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 发表论文部分样式 */
.publications {
    background-color: var(--background-light);
}

.publications-list {
    max-width: none;
}

.publication-item {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1rem;
    padding: 1.25rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.publication-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--border-color);
}

.pub-year {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 90px;
    flex-shrink: 0;
    padding: 0.375rem 0.75rem;
    background: var(--background-light);
    border-radius: var(--border-radius);
    text-align: center;
    height: fit-content;
    border: 1px solid var(--border-color);
}

.pub-content {
    flex: 1;
}

.pub-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
    transition: var(--transition);
}

.pub-authors {
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

.pub-venue {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.75rem;
    font-style: italic;
}

.pub-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.pub-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--primary-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    background: transparent;
    cursor: pointer;
    font-family: inherit;
}

.pub-link:hover {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow);
}

/* Ensure button elements in pub-links have correct cursor */
button.pub-link {
    cursor: pointer !important;
}

button.cite-btn {
    cursor: pointer !important;
}

/* Citation block styles */
.citation-block {
    display: none;
    margin-top: 1rem;
    padding: 1rem;
    background: var(--extra-light-green);
    border: 1px solid var(--light-green);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.citation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    transition: var(--transition);
    font-size: 0.875rem;
}

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

.citation-code {
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 1rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', monospace;
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--text-primary);
    overflow-x: auto;
    margin: 0;
    white-space: pre-wrap;
    word-break: break-all;
}

.view-all {
    text-align: left;
    margin-top: 3rem;
}

/* 教学部分样式 */
.teaching-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.course-item {
    padding: 2rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: left;
}

.course-item:hover {
    box-shadow: var(--shadow-lg);
}

.course-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.course-level {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 1rem;
}

.course-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 联系方式部分样式 */
.contact {
    background-color: var(--background-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: none;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: flex-start;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 0.25rem;
    min-width: 24px;
}

.contact-item h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.social-links h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.social-icons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: var(--border-radius);
}

.social-link:hover {
    color: var(--primary-color);
    background-color: var(--background-light);
}

.social-link i {
    font-size: 1.2rem;
    width: 20px;
    text-align: center;
}

/* 页脚样式 */
.footer {
    background-color: var(--text-primary);
    color: white;
    text-align: left;
    padding: 2rem 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.visitor-stats {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    min-width: 120px;
}

.stat-item i {
    font-size: 1.25rem;
    color: var(--accent-color);
}

.stat-item span:nth-child(2) {
    font-weight: 600;
    font-size: 1.25rem;
    color: white;
}

.stat-item span:nth-child(3) {
    font-size: 0.875rem;
    color: #d1d5db;
}

@media (max-width: 768px) {
    .visitor-stats {
        gap: 1rem;
    }
    
    .stat-item {
        min-width: 100px;
        padding: 0.5rem 0.75rem;
    }
    
    .stat-item span:nth-child(2) {
        font-size: 1.1rem;
    }
}

/* Experience Section Styles */
.experience {
    background-color: var(--background-white);
}

.experience-list {
    max-width: none;
}

.experience-item {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1rem;
    padding: 1.25rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    background: var(--background-white);
}

.experience-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--border-color);
    background: var(--background-white);
}

.exp-period {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 90px;
    flex-shrink: 0;
    padding: 0.375rem 0.75rem;
    background: var(--background-light);
    border-radius: var(--border-radius);
    text-align: center;
    height: fit-content;
    border: 1px solid var(--border-color);
}

.experience-item:hover .exp-period {
    background: var(--background-light);
}

.exp-content {
    flex: 1;
}

.exp-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
}

.exp-content h4 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.exp-content p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.375rem;
}

/* Education Section Styles */
.education-section {
    background-color: var(--background-light);
}

.education-list {
    max-width: none;
}

.education-section .education-item {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1rem;
    padding: 1.25rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.education-section .education-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--border-color);
}

.edu-period {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 90px;
    flex-shrink: 0;
    padding: 0.375rem 0.75rem;
    background: var(--background-light);
    border-radius: var(--border-radius);
    text-align: center;
    height: fit-content;
    border: 1px solid var(--border-color);
}

.edu-content {
    flex: 1;
}

.edu-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
}

.edu-content h4 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.edu-content p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.375rem;
}

/* Services Section Styles */
.services {
    background-color: var(--background-white);
}

.services-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.service-category {
    padding: 1.25rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.service-category:hover {
    box-shadow: var(--shadow-hover);
    background: var(--background-white);
    border-color: var(--border-color);
}

.service-category h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    padding-bottom: 0.375rem;
}

.service-category ul {
    list-style: none;
    padding: 0;
}

.service-category li {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.5rem;
    padding: 0.375rem 0.5rem;
    background: var(--background-light);
    border-radius: 0.25rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.service-category li:hover {
    background: var(--background-light);
}

/* Awards Section Styles */
.awards {
    background-color: var(--background-light);
}

.awards-list {
    max-width: none;
}

.award-item {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1rem;
    padding: 1.25rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
}

.award-item::after {
    content: '🏆';
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    opacity: 0.3;
    transition: var(--transition);
}

.award-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--border-color);
}

.award-item:hover::after {
    opacity: 1;
}

.award-year {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 90px;
    flex-shrink: 0;
    padding: 0.375rem 0.75rem;
    background: var(--background-light);
    border-radius: var(--border-radius);
    text-align: center;
    height: fit-content;
    border: 1px solid var(--border-color);
}

.award-content {
    flex: 1;
}

.award-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
}

.award-content p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.375rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 4rem;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 1.5rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero {
        padding: 1.5rem 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: left;
        gap: 1.25rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .about-content {
        max-width: none;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .research-grid {
        grid-template-columns: 1fr;
    }

    .teaching-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn {
        width: 200px;
        justify-content: center;
    }

    .publication-item,
    .experience-item,
    .education-section .education-item,
    .award-item {
        flex-direction: column;
        gap: 0.75rem;
        padding: 1rem;
    }

    .pub-year,
    .exp-period,
    .edu-period,
    .award-year {
        min-width: auto;
        text-align: left;
        width: fit-content;
    }

    .container {
        padding: 0 1rem;
    }

    section {
        padding: 1.5rem 0;
    }

    .section-title {
        font-size: 1.75rem;
        margin-bottom: 1.25rem;
    }

    .services-content {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .contact-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .contact-separator {
        display: none;
    }

    .contact-link {
        font-size: 0.85rem;
        justify-content: flex-start;
        width: 100%;
    }

    .citation-block {
        margin-top: 0.75rem;
        padding: 0.75rem;
    }

    .citation-code {
        font-size: 0.75rem;
        padding: 0.75rem;
    }

    .citation-header {
        font-size: 0.85rem;
        margin-bottom: 0.5rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 1.5rem 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .profile-img {
        width: 200px;
        height: 200px;
    }

    section {
        padding: 1.25rem 0;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .item {
        padding: 0.75rem;
        margin-bottom: 0.75rem;
    }

    .item-period {
        min-width: 70px;
        padding: 0.25rem 0.5rem;
        font-size: 0.8rem;
    }

    .contact-info {
        gap: 0.25rem;
        font-size: 0.8rem;
    }

    .contact-link {
        font-size: 0.75rem;
        justify-content: flex-start;
        width: 100%;
    }

    .citation-code {
        font-size: 0.7rem;
        padding: 0.5rem;
    }

    .copy-btn {
        font-size: 0.8rem;
        padding: 0.2rem 0.4rem;
    }
}

/* 滚动行为 */
html {
    scroll-behavior: smooth;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}