/* aging.css */
/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.content-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    background: linear-gradient(to right, #408cc8, #40C782);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.2rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #408cc8;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #444;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: #408cc8;
}

.lang-switcher {
    display: flex;
    list-style: none;
    gap: 1rem;
}

.lang-switcher a {
    text-decoration: none;
    color: #666;
    font-weight: 500;
}

.lang-switcher a.active {
    color: #408cc8;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    padding: 160px 2rem 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 4rem;
}

.hero-image {
    flex: 0 0 45%;
}

.hero-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    background: linear-gradient(to right, #408cc8, #40C782);
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 2.8rem;
    margin-bottom: 2rem;
    color: #333;
    background: linear-gradient(to right, #408cc8, #40C782);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.achievements {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

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

.achievement-item i {
    font-size: 2rem;
    color: #408cc8;
    flex: 0 0 50px;
}

.achievement-item p {
    font-size: 1.1rem;
    font-weight: 500;
    color: #444;
    margin: 0;
}

/* Huang's Science Section */
.exploration-section {
    padding: 5rem 0;
    background: white;
}

.exploration-content {
    display: flex;
    gap: 4rem;
    margin-top: 3rem;
    align-items: center;
}

.exploration-video {
    flex: 1;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.exploration-video iframe {
    width: 100%;
    height: 315px;
    display: block;
}

.exploration-quote {
    flex: 1;
    text-align: center;
    padding: 2rem;
}

.exploration-quote blockquote {
    font-size: 1.4rem;
    line-height: 1.6;
    color: #444;
    font-style: italic;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 12px;
    position: relative;
}

.exploration-quote blockquote:before,
.exploration-quote blockquote:after {
    content: '"';
    font-size: 3rem;
    color: #408cc8;
    opacity: 0.3;
    position: absolute;
}

.exploration-quote blockquote:before {
    top: 0;
    left: 1rem;
}

.exploration-quote blockquote:after {
    bottom: -1.5rem;
    right: 1rem;
}

.quote-author {
    font-weight: 600;
    color: #408cc8;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* Research Highlights */
.research-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.research-highlight {
    display: flex;
    gap: 4rem;
    margin-bottom: 6rem;
    align-items: center;
}

.research-highlight.reverse {
    flex-direction: row-reverse;
    margin-top: 4rem;
}

.research-content {
    flex: 1;
}

.research-content h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #408cc8;
    font-weight: 700;
}

.research-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: #444;
}

.research-button {
    display: inline-block;
    background: linear-gradient(to right, #408cc8, #40C782);
    color: white;
    padding: 12px 28px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(64, 140, 200, 0.3);
}

.research-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(64, 140, 200, 0.4);
}

.research-image {
    flex: 0 0 45%;
}

.research-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    background: linear-gradient(to right, #408cc8, #40C782);
}

/* Publications */
.publications-section {
    padding: 5rem 0;
    background: white;
}

.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.publication-card {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    text-align: center;
}

.publication-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

.pub-icon {
    font-size: 3rem;
    color: #408cc8;
    margin-bottom: 1.5rem;
}

.publication-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 700;
}

.pub-journal {
    color: #666;
    font-style: italic;
    margin-bottom: 1.5rem;
}

.pub-link {
    color: #408cc8;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.pub-link:hover {
    color: #40C782;
}

.publications-button-container {
    grid-column: 1 / -1; /* 让按钮容器跨越所有列 */
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    width: 100%;
}

/* 在大屏幕上保持按钮原始宽度 */
@media (min-width: 901px) {
    .publications-button-container .research-button {
        width: auto;
        min-width: 300px;
    }
}

/* 小屏幕样式保持不变（继承原有的响应式设计） */

/* Research Impact */
.impact-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.impact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.impact-item {
    text-align: center;
    padding: 2.5rem 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.impact-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

.impact-icon {
    font-size: 3rem;
    color: #408cc8;
    margin-bottom: 1.5rem;
}

.impact-item h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 700;
}

.impact-item p {
    color: #555;
    line-height: 1.7;
}

/* Testimonials Section */
.testimonials-section {
    padding: 5rem 0;
    background: white;
}

.testimonials-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    position: relative;
}

.testimonial-card:before {
    content: '"';
    font-size: 5rem;
    color: #408cc8;
    opacity: 0.2;
    position: absolute;
    top: 10px;
    left: 20px;
    line-height: 1;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 1.5rem;
    color: #444;
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #408cc8;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.author-details {
    flex: 1;
    text-align: left;
}

.author-name {
    font-weight: 600;
    color: #408cc8;
}

.author-title {
    font-size: 0.9rem;
    color: #666;
}

/* FAQ Section */
.faq-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: #408cc8;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: #555;
    line-height: 1.6;
    display: none;
}

.faq-toggle {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(180deg);
}

.faq-item.active .faq-answer {
    display: block;
}

/* Collaboration Section */
.collaboration-section {
    padding: 5rem 0;
    background: white;
    text-align: center;
}

.collaboration-content {
    max-width: 800px;
    margin: 0 auto;
}

.collaboration-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #444;
}

.collaboration-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.collaboration-option {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.collaboration-option:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

.option-icon {
    font-size: 3rem;
    color: #408cc8;
    margin-bottom: 1.5rem;
}

.option-title {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #333;
}

.option-description {
    color: #555;
    margin-bottom: 1.5rem;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 0 2rem;
}

.footer-section h4 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: #ecf0f1;
}

.footer-section p,
.footer-section a {
    color: #ecf0f1;
    margin-bottom: 0.8rem;
    display: block;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #40C782;
}

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

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: #40C782;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 3rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #bdc3c7;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: #40C782;
    text-decoration: none;
}


/* Animations */
.animate {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.2s;
}

.delay-2 {
    transition-delay: 0.4s;
}

/* Responsive Design */
@media (max-width: 1100px) {
    .hero-container {
        flex-direction: column;
        text-align: center;
    }
    
    .research-highlight,
    .research-highlight.reverse {
        flex-direction: column;
    }
    
    .exploration-content {
        flex-direction: column;
    }
    
    .hero-image,
    .research-image {
        flex: 1;
        margin-bottom: 2rem;
    }
    
    .achievement-item {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 900px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hamburger {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .publications-grid {
        grid-template-columns: 1fr;
    }
    
    .impact-content {
        grid-template-columns: 1fr;
    }
    
    .testimonials-container {
        grid-template-columns: 1fr;
    }
    
    .collaboration-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-section {
        padding: 120px 1rem 60px;
    }
    
    .research-button {
        width: 100%;
        text-align: center;
    }
}

/* 导航栏样式 - 与media.html保持一致 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(135deg, #408cc8, #40C782);
    padding: 1.2rem 2rem;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.logo:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: rgba(255,255,255,0.9);
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 30px;
    position: relative;
}

.nav-links a:hover {
    color: white;
    background: rgba(255,255,255,0.15);
}

.nav-links a.active {
    background: rgba(255,255,255,0.2);
    color: white;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: white;
    transition: all 0.3s ease;
}

.lang-switcher {
    display: flex;
    gap: 1rem;
    margin-left: 2rem;
    list-style: none;
}

.lang-switcher a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 6px 12px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.lang-switcher a.active {
    background: rgba(255,255,255,0.2);
    color: white;
}

.lang-switcher a:not(.active):hover {
    background: rgba(255,255,255,0.1);
}

/* 页脚样式 - 与media.html保持一致 */
footer {
    background: linear-gradient(135deg, #2a7cc7 0%, #2ec57d 100%);
    color: white;
    padding: 5rem 2rem 2.5rem;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('static/image/logo.png') center/cover;
    opacity: 0.03;
    z-index: 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3.5rem;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.footer-section h4 {
    font-size: 1.5rem;
    margin-bottom: 1.8rem;
    position: relative;
    padding-bottom: 12px;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 4px;
    background: white;
    border-radius: 2px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.footer-section p:hover {
    transform: translateX(5px);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: all 0.3s ease;
    display: block;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-section a:hover {
    color: white;
    transform: translateX(5px);
}

.social-icons {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.8rem;
    flex-wrap: wrap;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-6px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.social-icon i {
    font-size: 1.5rem;
    color: white;
}

.footer-bottom {
    text-align: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline;
    margin-bottom: 0;
    font-size: 0.95rem;
    font-weight: normal;
}

.footer-bottom a:hover {
    color: white;
    text-decoration: none;
    transform: translateX(5px);
}

/* 响应式设计 */
@media (max-width: 900px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: linear-gradient(135deg, #408cc8, #40C782);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.2rem;
        box-shadow: 0 5px 15px rgba(0,0,0,0.15);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hamburger {
        display: block;
    }
    
    .lang-switcher {
        margin-left: 0;
        justify-content: center;
        margin-top: 1rem;
    }
}

@media (max-width: 600px) {
    .navbar {
        padding: 1rem;
    }
    
    .nav-container {
        padding: 0.8rem;
    }
}

.footer-section h4 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: #ecf0f1;
}

.journal-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: linear-gradient(to right, #408cc8, #40C782);
    color: white;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 1;
}

.publication-card {
    position: relative;
    overflow: visible;
}

.faq-button-container {
    text-align: center;
    margin-top: 1.5rem;
}

/* 回到顶部按钮样式 - 与media.html保持一致 */
#backToTop {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(to right, #408cc8, #40C782);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
    z-index: 999;
}

#backToTop:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

#backToTop:active {
    transform: scale(0.95);
}

.image-copyright {
    text-align: center;
    font-size: 0.9rem;
    color: #666;
    margin-top: 0.8rem;
    font-style: italic;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.research-image:hover .image-copyright {
    opacity: 1;
    color: #408cc8;
}

/* 新增的动画效果 */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-section {
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        rgba(248, 250, 252, 0.2) 50%, 
        rgba(226, 232, 240, 0.1) 100%);
    z-index: 0;
}

.hero-container {
    position: relative;
    z-index: 2;
}

.hero-image {
    animation: float 6s ease-in-out infinite;
    position: relative;
}

.hero-image::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 20px;
    background: radial-gradient(ellipse at center, 
        rgba(0, 0, 0, 0.4) 0%, 
        rgba(0, 0, 0, 0) 70%);
    filter: blur(5px);
    z-index: -1;
    opacity: 0.5;
    animation: pulse 4s ease-in-out infinite;
}

.hero-content h1 {
    position: relative;
    display: inline-block;
}

.hero-content h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, 
        transparent, 
        #408cc8, 
        #40C782, 
        transparent);
    background-size: 200% 100%;
    animation: shimmer 3s infinite linear;
}

.achievement-item {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.achievement-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.4), 
        transparent);
    transition: left 0.7s ease;
}

.achievement-item:hover::before {
    left: 100%;
}

.achievement-item:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.achievement-item i {
    transition: all 0.4s ease;
}

.achievement-item:hover i {
    transform: scale(1.2);
    color: #40C782;
}

/* 增强现有动画 */
.animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.3s; }
.delay-2 { transition-delay: 0.6s; }
.delay-3 { transition-delay: 0.9s; }

/* 修改英雄区域标题样式 - 去掉下划线动画 */
.hero-content h1::after {
    display: none; /* 移除下划线动画 */
}

/* 修改英雄区域图片样式 - 去掉浮动动画和阴影动画 */
.hero-image {
    animation: none; /* 移除浮动动画 */
    position: relative;
}

.hero-image::after {
    display: none; /* 移除阴影效果 */
}

/* 修改footer的padding，使其与media.html一致 */
footer {
    padding: 5rem 2rem 2.5rem;
}

/* 确保footer-content的宽度和间距与media.html一致 */
.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
}

/* 调整footer-bottom的间距 */
.footer-bottom {
    max-width: 1400px;
    margin: 4rem auto 0;
    padding-top: 2rem;
}

.preprint-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: linear-gradient(to right, #FF8C00, #FFA500);
    color: white;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 1;
}

/* 网页文章特殊样式 */
.publication-card.web-article {
    border-top: 4px solid #40C782;
    position: relative;
    overflow: hidden;
}

.publication-card.web-article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #408cc8, #40C782);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.publication-card.web-article:hover::before {
    opacity: 1;
}

.publication-card.web-article .pub-icon {
    color: #40C782;
}

.publication-card.web-article .pub-journal {
    color: #40C782;
    font-weight: 600;
}

.publication-card.web-article .pub-link {
    color: #40C782;
    font-weight: 600;
}

.publication-card.web-article .pub-link:hover {
    color: #408cc8;
}