:root {
    --primary-color: hsl(204, 86%, 53%);
    --primary-hover: hsl(204, 86%, 48%);
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-emphasis:hsl(208, 86%, 53%);
    --text-muted: #999999;
    --background: #ffffff;
    --background-secondary: #f8f9fa;
    --border-color: #e9ecef;
    --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --border-radius-large: 12px;
}

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

html {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Inter', 'Roboto', sans-serif;
    background: #fff;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Inter', 'Roboto', sans-serif;
    line-height: 1.6;
    background: var(--background);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Hero Section */
.hero {
    background: var(--background);
    padding: 0rem 0;
    display: flex;
    align-items: center;
    position: relative;
}

.hero-body {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.1s forwards;
}

.publication-title {
    font-family: 'Google Sans', sans-serif;
    font-size: 2.5rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.publication-authors {
    font-family: 'Google Sans', sans-serif;
    font-size: 1.2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.publication-authors a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.publication-authors a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.publication-authors a:hover {
    color: var(--primary-hover);
}

.publication-authors a:hover::after {
    width: 100%;
}

.publication-venue {
    font-size: 1.5rem;
    color: var(--text-emphasis);
    font-weight: 600;
    margin-bottom: 0.6rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease 0.3s forwards;
}

.publication-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

.button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--background);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
    transform: translateY(0);
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Content Sections */
.content-section {
    background: var(--background);
    border-radius: var(--border-radius-large);
    padding: 2rem;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    opacity: 1;
    transform: translateY(0);
    transition: all 0.6s ease;
}

/* Global paragraph styling with side margins */
p {
    margin-left: 1.5rem;
    margin-right: 1.5rem;
}

.content-section.fade-in-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.content-section.fade-in-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 为不同的内容区域设置不同的延迟时间 */
.content-section:nth-of-type(1) { /* Abstract */
    animation-delay: 1.2s;
}

.content-section:nth-of-type(2) { /* Motivation */
    animation-delay: 1.6s;
}

.content-section:nth-of-type(3) { /* Contributions */
    animation-delay: 2.0s;
}

.content-section:nth-of-type(4) { /* Method */
    animation-delay: 2.4s;
}

.content-section:nth-of-type(5) { /* BibTeX */
    animation-delay: 2.8s;
}

.content-section.visible {
    opacity: 1;
    transform: translateY(0);
}

#research-question {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 3rem 0;
}

.section-title {
    font-family: 'Google Sans', sans-serif !important;
    font-size: 2.2rem !important;
    font-weight: 600 !important;
    color: var(--text-primary) !important;
    margin-bottom: 1.0rem;
    text-align: center;
    position: relative;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

.abstract-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    text-align: justify;
    max-width: 800px;
    margin: 0 auto;
}

.abstract-content p {
    margin-bottom: 1rem;
}

/* Video Section */
.publication-video {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    overflow: hidden;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-medium);
    margin: 2rem 0;
}

.publication-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Results Section */
.results-carousel {
    margin: 2rem 0;
}

.results-carousel .item {
    margin: 0.5rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.results-carousel .item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.results-carousel .item img {
    width: 100%;
    height: auto;
    display: block;
}

/* BibTeX Section */
.bibtex-container {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 8px;
    margin: 15px 0;
    font-family: 'Roboto Mono', monospace;
    position: relative;
}

.bibtex-container pre {
    margin: 0;
    background: transparent;
    border: none;
    padding: 8px 12px;
    font-size: 13px;
    line-height: 1.4;
    color: #333;
    white-space: pre;
    overflow-x: auto;
}

.bibtex-container code {
    background: transparent;
    color: #333;
    padding: 0;
    font-family: inherit;
}

/* .bibtex-container::before {
    content: "BibTeX";
    position: absolute;
    top: 0px;
    left: 15px;
    background: #f6f6f3;
    padding: 0 8px;
    font-size: 12px;
    font-weight: 600;
    color: #666;
    font-family: system-ui;
} */

/* .bibtex-container pre {
    margin: 0;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
    white-space: pre-wrap;
    word-wrap: break-word;
} */

/* BibTeX Copy Button */
.copy-button {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: var(--shadow-light);
}

.copy-button:hover {
    background: var(--background-secondary);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.copy-button:active {
    transform: translateY(0);
}

.copy-button.copied {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}


/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.navbar-item {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.navbar-item:hover {
    color: var(--primary-color);
}

/* Top navigation bar that appears on scroll */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transform: translateY(-100%);
    transition: all 0.3s ease;
    pointer-events: none;
}

.top-nav.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.top-nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.top-nav-links {
    list-style: none;
    margin: 0;
    padding: 15px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.top-nav-links li {
    margin: 0;
}

.top-nav-links a {
    color: rgba(0, 0, 0, 0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    padding: 8px 16px;
    border-radius: 6px;
    position: relative;
    white-space: nowrap;
}

.top-nav-links a:hover {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.top-nav-links a.active {
    color: #667eea;
    background: rgba(102, 126, 234, 0.15);
}

.top-nav-links a.active::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: #667eea;
    border-radius: 2px;
}

/* Enhanced citation styling */
.citation {
    position: relative;
    color: #667eea;
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid rgba(102, 126, 234, 0.3);
    transition: all 0.2s ease;
    display: inline-block;
}

.citation:hover {
    color: #4c51bf;
    border-bottom-color: #4c51bf;
}

.citation-hover {
    position: absolute;
    background: white;
    border: 1px solid #333;
    border-radius: 5px;
    padding: 12px 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 10000;
    max-width: 350px;
    font-size: 13px;
    line-height: 1.4;
    color: #333;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    transform: translateY(-5px);
    top: -100%;
    left: 50%;
    margin-left: -175px;
    white-space: normal;
}

.citation:hover .citation-hover {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
}

.citation-hover strong {
    color: #000;
    font-weight: 600;
}

.citation-hover em {
    font-style: italic;
    color: #555;
}

.return-icon {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 16px;
    height: 16px;
    cursor: pointer;
    color: #666;
    font-size: 14px;
    line-height: 1;
    transition: color 0.2s ease;
}

.return-icon:hover {
    color: #333;
}

.return-icon::before {
    content: "↑";
}

/* Enhanced reference section styling */
.references-section {
    background: #fafafa;
    border-top: 1px solid #eee;
    margin: 60px -20px 0;
    padding: 40px 20px 20px;
    font-size: 14px;
}

.references-section h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 0px;
    color: #333;
    border-bottom: 1px solid #ddd;
    padding-bottom: 0px;
}

.reference-item {
    position: relative;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: white;
    border: 1px solid #e5e5e5;
    border-radius: 5px;
    transition: all 0.2s ease;
}

.reference-item:hover {
    border-color: #ccc;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* .reference-item.highlight {
    background: #fff3cd;
    border-color: #ffc107;
    animation: highlight-fade 2s ease-out;
} */

@keyframes highlight-fade {
    0% { background: #fff3cd; }
    100% { background: white; }
}

.reference-id {
    font-weight: 600;
    color: #667eea;
    margin-right: 8px;
    font-family: 'Roboto Mono', monospace;
}

.reference-text {
    margin: 0;
    line-height: 1.5;
}

.reference-text strong {
    font-weight: 600;
    color: #333;
}

.reference-text em {
    font-style: italic;
    color: #555;
}

.back-to-text {
    position: absolute;
    bottom: 12px;
    right: 12px;
    width: 20px;
    height: 20px;
    cursor: pointer;
    color: #667eea;
    transition: color 0.2s ease;
    font-size: 16px;
    line-height: 20px;
    text-align: center;
    font-weight: bold;
}

.back-to-text:hover {
    color: #4c51bf;
}

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes zoomIn {
    from {
        transform: scale(0.5);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* Comparison container using flexbox */
.comparison-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
}

.vs-connector {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 60px;
}

.vs-text {
    font-size: 3rem;
    color: #667eea;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Model comparison boxes */
.model-comparison-box {
    text-align: center;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
    flex: 1;
    max-width: 500px;
}

.model-comparison-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.model-comparison-box img {
    max-width: 100%;
    width: 100%;
    max-width: 550px;
    height: auto;
    border-radius: 8px;
    transition: transform 0.3s ease;
    cursor: zoom-in;
}

.model-comparison-box img:hover {
    transform: scale(1.02);
}

.model-comparison-box h4 {
    margin-top: 1rem;
    font-weight: 600;
    color: #333;
    font-size: 1.1rem;
}

.model-comparison-box p {
    margin-top: 0.1rem;
    font-weight: 400;
    color: #333333b0;
    font-size: 0.9rem;
}

/* Image modal for zoom functionality */
.image-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s ease;
}

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

.image-modal-content {
    max-width: 90%;
    max-height: 90%;
    border-radius: 8px;
    animation: zoomIn 0.3s ease;
}

.image-modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.image-modal-close:hover {
    color: #ccc;
}

/* Enhanced contribution cards */
.contributions-content {
    margin-top: 2rem;
}

.contribution-card {
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    min-height: 50px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
    margin-bottom: 1rem;
}

.contribution-card:hover {
    /* transform: translateY(-8px); */
    box-shadow: 0 3px 12px rgba(0,0,0,0.15);
}

.contribution-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
    position: relative;
    z-index: 2;
    transition: transform 0.3s ease;
}

.contribution-card:hover .contribution-number {
    transform: scale(1.1);
}

/* Individual contribution color schemes */
.contribution-1 {
    border-left: 4px solid #ff6b6b;
}

.contribution-1 .contribution-number {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff5252 100%);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

.contribution-1:hover {
    border-color: #ff6b6b;
    background: linear-gradient(135deg, #fff 0%, rgba(255, 107, 107, 0.05) 100%);
}

.contribution-2 {
    border-left: 4px solid #4ecdc4;
}

.contribution-2 .contribution-number {
    background: linear-gradient(135deg, #4ecdc4 0%, #26a69a 100%);
    box-shadow: 0 4px 12px rgba(78, 205, 196, 0.3);
}

.contribution-2:hover {
    border-color: #4ecdc4;
    background: linear-gradient(135deg, #fff 0%, rgba(78, 205, 196, 0.05) 100%);
}

.contribution-3 {
    border-left: 4px solid #45b7d1;
}

.contribution-3 .contribution-number {
    background: linear-gradient(135deg, #45b7d1 0%, #2196f3 100%);
    box-shadow: 0 4px 12px rgba(69, 183, 209, 0.3);
}

.contribution-3:hover {
    border-color: #45b7d1;
    background: linear-gradient(135deg, #fff 0%, rgba(69, 183, 209, 0.05) 100%);
}

.contribution-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0px 0em 0 1em;
}

.contribution-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    color: #333;
    line-height: 1.3;
    transition: color 0.3s ease;
}

.contribution-1:hover .contribution-content h4 {
    color: #ff6b6b;
}

.contribution-2:hover .contribution-content h4 {
    color: #4ecdc4;
}

.contribution-3:hover .contribution-content h4 {
    color: #45b7d1;
}

.contribution-content p {
    color: #666;
    line-height: 1.6;
    margin: 0;
    font-size: 1rem;
}

/* Research Question Enhanced Styling */
.research-question-highlight {
    background: linear-gradient(60deg, #c2dcfa 0%, #f1f2fe 100%);
    color: #333333;
    padding: 1.5rem 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.1);
    margin: 1rem 6rem;
    position: relative;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.research-question-highlight:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.15);
    background: linear-gradient(60deg, #c2dcfa 0%, #f1f2fe 100%);
}

.research-question-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
    color: #474646;
    text-shadow: none;
    transition: all 0.3s ease;
}

.research-question-highlight:hover .research-question-title {
    transform: scale(1.02);
    color: #222222;
}

.question-content {
    position: relative;
    background: rgba(255, 255, 255, 0.7);
    padding: 1.2rem;
    border-radius: 8px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(102, 126, 234, 0.15);
    transition: all 0.3s ease;
}

.research-question-highlight:hover .question-content {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(102, 126, 234, 0.25);
    backdrop-filter: blur(8px);
}

.research-question-text {
    font-size: 1.2rem;
    line-height: 1.5;
    font-weight: 450;
    margin: 0em 1;
    color: #474646;
    position: relative;
    transition: all 0.3s ease;
}



.research-question-text::before {
    content: '"';
    font-size: 2.5rem;
    position: absolute;
    left: -1.2rem;
    top: -0.8rem;
    opacity: 0.4;
    color: #667eea;
    font-style: italic;
    font-family: Georgia, serif;
    transition: all 0.3s ease;
}

.research-question-text::after {
    content: '"';
    font-size: 2.5rem;
    position: absolute;
    right: -1.2rem;
    bottom: -1.2rem;
    opacity: 0.4;
    color: #667eea;
    font-family: Georgia, serif;
    font-style: italic;
    transition: all 0.3s ease;
}

.research-question-highlight:hover .research-question-text::before,
.research-question-highlight:hover .research-question-text::after {
    opacity: 0.6;
    color: #5357bb;
}

/* Unified Figure Styling */
.figure-container,
.method-figure,
.analysis-figure {
    width: 100%;
    margin: 0.5rem 0;
    text-align: center;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    transition: none;
}

.figure-container:hover,
.method-figure:hover,
.analysis-figure:hover {
    transform: none;
    box-shadow: none;
}

/* Figure titles */
.figure-container h4,
.method-figure h4,
.analysis-figure h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
    text-align: center;
}

/* Unified image styling for all figures */
.figure-container img,
.method-figure img,
.analysis-figure img {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    transition: transform 0.3s ease;
    cursor: zoom-in;
    border: none;
    box-shadow: none;
    padding: 1rem;
}

.figure-container img:hover,
.method-figure img:hover,
.analysis-figure img:hover {
    transform: scale(1.02);
}

/* Figure captions */
.figure-caption,
.analysis-figure p {
    margin-top: 0.2rem;
    font-size: 0.9rem;
    color: #666;
    line-height: 1.5;
    text-align: center;
    font-style: italic;
    padding: 0 1rem;
}

/* Remove any column-based layouts for figures */
.columns .analysis-figure {
    width: 100%;
    margin-bottom: 0.2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .top-nav {
        display: none !important;
    }

    .publication-title {
        font-size: 2rem;
    }
    
    .content-section {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    #research-question {
        padding: 2rem 0;
    }
    
    .research-question-highlight {
        padding: 1.5rem;
        margin: 1rem 2rem;
    }
    
    .contribution-card {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .contribution-number {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .contribution-content {
        flex: none;
        padding: 0;
    }
    
    .contribution-content h4 {
        font-size: 1.2rem;
    }
    
    .publication-links {
        flex-direction: column;
        align-items: center;
    }

    .button {
        width: 200px;
        justify-content: center;
    }
    
    .citation-hover {
        max-width: 280px;
        font-size: 12px;
    }
    
    .references-section {
        margin: 40px -10px 0;
        padding: 30px 10px 20px;
    }
    
    .comparison-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .vs-connector {
        transform: rotate(90deg);
        min-width: auto;
        min-height: 40px;
    }
    
    .vs-text {
        font-size: 2.5rem;
    }
    
    .model-comparison-box {
        padding: 1rem;
        margin-bottom: 0;
        max-width: 100%;
    }
    
    .model-comparison-box img {
        max-width: 200px;
    }
    
    .model-comparison-box h4 {
        font-size: 1rem;
        margin-top: 0.8rem;
    }
}

@media (max-width: 480px) {
    .content-section {
        padding: 1rem;
        margin: 0.5rem;
    }
    
    #research-question {
        padding: 1.5rem 0;
    }
    
    .research-question-highlight {
        padding: 1rem;
        margin: 1rem;
    }
    
    .contribution-card {
        padding: 1rem;
    }
    
    .contribution-number {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
    
    .contribution-content h4 {
        font-size: 1.1rem;
    }
    
    .floating-nav {
        margin: 10px;
        padding: 10px 15px;
    }
    
    .references-section {
        padding: 20px 10px 15px;
    }
    
    .comparison-container {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .vs-connector {
        transform: rotate(90deg);
        min-height: 30px;
    }
    
    .vs-text {
        font-size: 2rem;
    }
    
    .model-comparison-box {
        padding: 0.8rem;
        max-width: 100%;
    }
    
    .model-comparison-box img {
        max-width: 150px;
    }
    
    .model-comparison-box h4 {
        font-size: 0.9rem;
    }
}

/* Copyright Section */
.copyright-section {
    padding-top: 2rem;
    text-align: center;
    font-size: 0.9rem;
}

.copyright-section p {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.copyright-section .attribution {
    margin-top: 1rem;
    font-size: 0.8rem;
}

.copyright-section .attribution p {
    margin-bottom: 0;
}

.copyright-section a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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