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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #1e2f43;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: white;
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(62, 96, 134, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: #3e6086;
    font-weight: 600;
}

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

.nav-link {
    text-decoration: none;
    color: #1e2f43;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #3e6086;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #1e2f43;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, rgba(90, 123, 163, 0.9) 0%, rgba(62, 96, 134, 0.9) 100%), url('background1.png');
    background-size: cover;
    background-position: center;
    color: white;
    padding-top: 120px;
    position: relative;
    overflow: hidden;
}

/* Animated Background */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    animation: backgroundShift 20s ease-in-out infinite;
    z-index: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255, 255, 255, 0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255, 255, 255, 0.4), transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(255, 255, 255, 0.2), transparent),
        radial-gradient(2px 2px at 160px 30px, rgba(255, 255, 255, 0.3), transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    transform: translate(var(--particle-x, 0px), var(--particle-y, 0px));
    transition: transform 0.15s ease-out;
    z-index: 1;
}

@keyframes backgroundShift {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    25% {
        transform: translateX(-10px) translateY(-5px);
    }
    50% {
        transform: translateX(5px) translateY(-10px);
    }
    75% {
        transform: translateX(-5px) translateY(5px);
    }
}

@keyframes particleFloat {
    0% {
        transform: translateY(0px);
    }
    100% {
        transform: translateY(-100px);
    }
}

.hero-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    position: relative;
    z-index: 2;
}

.hero-title,
.hero-subtitle,
.hero-description {
    text-align: center;
}

.hero-icons {
    display: flex;
    flex-direction: row;
    gap: 2rem;
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.8);
    justify-content: center;
    width: 100%;
}

/* Remove .hero-left and .hero-right if present */
.hero-left, .hero-right { display: none; }

.hero-image {
    display: none;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #ffffff, #e8edf3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    color: #e8edf3;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.8;
    color: #cbd5e1;
}

/* Hero Dates Section - Embedded in Hero */
.hero-dates {
    width: 100%;
    margin-top: 2.5rem;
    display: block;
}

.hero-dates-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: white;
}

.hero-dates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-date-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease, background 0.3s ease;
}

.hero-date-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.hero-date-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.hero-date-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: white;
    font-weight: 500;
}

.hero-date {
    font-size: 1rem;
    color: #e8edf3;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.hero-countdown-small {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    border-left: 3px solid rgba(255, 255, 255, 0.3);
}

.hero-countdown-text {
    font-size: 0.8rem;
    color: #e8edf3;
    font-weight: 500;
    display: block;
    text-align: center;
}

.hero-countdown-small .time-unit {
    font-weight: 600;
    color: #cbd5e1;
    font-size: 0.7rem;
}

.hero-register-text {
    margin-top: 1rem;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    font-style: italic;
}

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

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: #3e6086;
    color: white;
}

.btn-primary:hover {
    background: #2d4a66;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #3e6086;
}

.hero-graphic {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero-graphic i {
    animation: float 3s ease-in-out infinite;
}

.hero-graphic i:nth-child(2) {
    animation-delay: 1s;
}

.hero-graphic i:nth-child(3) {
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Registration Section */
.registration {
    background: linear-gradient(135deg, #2563eb 0%, #3e6086 100%);
    padding: 3rem 0;
}

.registration-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    background: rgba(255, 255, 255, 0.95);
    padding: 2.5rem 3rem;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    max-width: 900px;
    margin: 0 auto;
}

.registration-icon {
    flex-shrink: 0;
}

.registration-icon i {
    font-size: 4rem;
    color: #2563eb;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.registration-content {
    text-align: center;
}

.registration-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e2f43;
    margin-bottom: 0.5rem;
}

.registration-content p {
    font-size: 1.1rem;
    color: #64748b;
    margin-bottom: 1.5rem;
}

.registration-btn {
    display: inline-block;
    background: linear-gradient(135deg, #2563eb 0%, #3e6086 100%);
    color: white;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.registration-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(37, 99, 235, 0.4);
}

.registration-btn i {
    margin-right: 0.5rem;
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1e2f43;
}

/* About Section */
.about {
    background: #f5f7fa;
}

/* Mission Section - Full Width */
.mission-section {
    margin-bottom: 4rem;
}

.mission-section h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

.mission-section p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

/* Core Values Section - Full Width */
.core-values {
    margin-bottom: 2rem;
}

.core-values h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #1e2f43;
}

.core-values-section {
    grid-template-columns: 1fr;
    gap: 2rem;
}

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

.value-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(62, 96, 134, 0.05);
    transition: transform 0.3s ease;
}

.value-card:hover {
    transform: translateY(-5px);
}

.value-card i {
    font-size: 2rem;
    color: #3e6086;
    margin-bottom: 1rem;
}

.value-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

/* Scope Section */
.scope {
    background: white;
}

.scope-content {
    position: relative;
    overflow: hidden;
}

.scope-text {
    display: block;
    text-align: left;
}

.scope-description {
    font-size: 1rem;
    margin-bottom: 2rem;
    line-height: 1.8;
    color: #1e2f43;
    text-align: left;
}

.scope-image {
    float: right;
    margin: 0 0 2rem 2rem;
    max-width: 40%;
}

.scope-about-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(62, 96, 134, 0.15);
}

/* Submission Section */
.submission {
    background: #f5f7fa;
}

.submission-content {
    display: grid;
    gap: 3rem;
}

.submission-main {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(62, 96, 134, 0.05);
}

.submission-main h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

.submission-main ul {
    list-style: none;
}

.submission-main li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.submission-main li::before {
    content: "•";
    color: #3e6086;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.submission-requirements {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.requirement-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(62, 96, 134, 0.05);
    transition: transform 0.3s ease;
}

.requirement-card:hover {
    transform: translateY(-5px);
}

.requirement-card h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #1e2f43;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.requirement-card h4 i {
    color: #3e6086;
}

.requirement-card ul {
    list-style: none;
    margin-top: 1rem;
}

.requirement-card li {
    padding: 0.3rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.requirement-card li::before {
    content: "→";
    color: #3e6086;
    position: absolute;
    left: 0;
}

/* Review Section */
.review {
    background: white;
}

.review-content {
    display: grid;
    gap: 3rem;
}

.review-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step {
    text-align: center;
    padding: 2rem;
    background: #f5f7fa;
    border-radius: 12px;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: #3e6086;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

.awards {
    background: #f5f7fa;
    padding: 2rem;
    border-radius: 12px;
}

.awards h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

.awards ul {
    list-style: none;
}

.awards li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.awards li::before {
    content: "🏆";
    position: absolute;
    left: 0;
}

.transparency {
    background: #f5f7fa;
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
}

.transparency h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

.transparency ul {
    list-style: none;
}

.transparency li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.transparency li::before {
    content: "🔍";
    position: absolute;
    left: 0;
}

.review-template {
    background: #f5f7fa;
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
}

.review-template h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

.review-template p {
    line-height: 1.6;
    color: #1e2f43;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, rgba(90, 123, 163, 0.9) 0%, rgba(62, 96, 134, 0.9) 100%), url('background1.png');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 120px 0 60px;
    text-align: center;
}

.page-description {
    font-size: 1.2rem;
    margin-top: 1rem;
    opacity: 0.9;
}

/* FAQ Section */
.faq {
    background: white;
    padding: 4rem 0;
}

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

.faq-category {
    margin-bottom: 3rem;
}

.faq-category h3 {
    font-size: 1.5rem;
    color: #3e6086;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 0.5rem;
}

.faq-item {
    background: #f8fafc;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    border-left: 4px solid #3e6086;
}

.faq-item h4 {
    font-size: 1.1rem;
    color: #1e2f43;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.faq-item p {
    color: #64748b;
    line-height: 1.6;
}

.faq-item a {
    color: #3e6086;
    text-decoration: none;
}

.faq-item a:hover {
    text-decoration: underline;
}

/* Dates Section */
.dates {
    background: #f5f7fa;
}

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

.date-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(62, 96, 134, 0.05);
    transition: transform 0.3s ease;
}

.date-card:hover {
    transform: translateY(-5px);
}

.date-icon {
    width: 80px;
    height: 80px;
    background: #3e6086;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1rem;
}

.date-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

.date {
    font-size: 1.1rem;
    color: #3e6086;
    font-weight: 600;
}

/* Small Countdown Styles */
.countdown-small {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: #f1f5f9;
    border-radius: 6px;
    border-left: 3px solid #3e6086;
}

.countdown-text {
    font-size: 0.85rem;
    color: #64748b;
    font-weight: 500;
    display: block;
    text-align: center;
}

.countdown-small .time-unit {
    font-weight: 600;
    color: #3e6086;
}

/* Format Section */
.format {
    background: white;
}

.format-description {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

.format-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.format-item {
    text-align: center;
    padding: 2rem;
    background: #f5f7fa;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.format-item:hover {
    transform: translateY(-5px);
}

.format-item i {
    font-size: 3rem;
    color: #3e6086;
    margin-bottom: 1rem;
}

.format-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1e2f43;
}

/* Organizers Section */
.organizers {
    background: #f5f7fa;
}

.organizers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.organizer-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(62, 96, 134, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.organizer-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(62, 96, 134, 0.1);
}

.organizer-image {
    margin-bottom: 1.5rem;
}

.image-placeholder {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #5a7ba3 0%, #3e6086 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    color: white;
    font-size: 2rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.organizer-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    margin: 0 auto;
    display: block;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    border: 3px solid #3e6086;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.organizer-photo:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* Specific positioning for James Zou's photo */
.organizer-photo[alt="James Zou"] {
    object-position: center 20%;
}

.organizer-info h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: #1e2f43;
}

.organizer-info h3 a {
    color: #3e6086;
    text-decoration: none;
    transition: color 0.3s ease;
}

.organizer-info h3 a:hover {
    color: #2d4a66;
    text-decoration: underline;
}

.organizer-title {
    font-size: 1rem;
    color: #64748b;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.organizer-affiliation {
    font-size: 0.9rem;
    color: #7a9bc1;
    font-style: italic;
}

/* Advisory Board Section */
.advisory-board {
    background: #f5f7fa;
}

.advisory-board-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advisor-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(62, 96, 134, 0.05);
    transition: transform 0.3s ease;
}

.advisor-card:hover {
    transform: translateY(-5px);
}

.advisor-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #1e2f43;
}

.advisor-title {
    font-size: 1rem;
    color: #4a5d7a;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.advisor-affiliation {
    font-size: 0.9rem;
    color: #7a9bc1;
}

/* Contact Section */
.contact {
    background: #f5f7fa;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: grid;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(62, 96, 134, 0.05);
}

.contact-item i {
    font-size: 1.5rem;
    color: #3e6086;
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #1e2f43;
}

.chairs {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(62, 96, 134, 0.05);
}

.chairs h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #1e2f43;
}

.chairs-list {
    display: grid;
    gap: 1rem;
}

.chair {
    padding: 1rem;
    background: #f5f7fa;
    border-radius: 8px;
    font-weight: 500;
    color: #1e2f43;
}

/* Footer */
.footer {
    background: #1e2f43;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #e8edf3;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #3e6086;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #4a5d7a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.social-links a:hover {
    background: #3e6086;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4a5d7a;
    color: #7a9bc1;
}

.footer-section .contact-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #cbd5e1;
}

.footer-section .contact-info i {
    color: #3e6086;
    font-size: 1.1rem;
}

.footer-mailto {
    margin-left: 0.5rem;
    color: #3e6086;
    font-size: 1.1rem;
    transition: color 0.2s;
    vertical-align: middle;
}
.footer-mailto:hover {
    color: #1e2f43;
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

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

    .hero-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .hero-left, .hero-right {
        text-align: center;
        align-items: center;
        justify-content: center;
    }

    .hero-icons {
        justify-content: center;
        margin-bottom: 1.5rem;
    }

    .hero {
        padding-top: 100px;
        min-height: auto;
        padding-bottom: 3rem;
    }

    .hero-container {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: 1.8rem;
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

    .hero-icons {
        font-size: 3rem;
        gap: 1.5rem;
    }

    .hero-dates-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hero-date-card {
        padding: 1rem;
    }

    .hero-dates-title {
        font-size: 1.5rem;
    }

    .core-values-section {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .scope-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

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

    .btn {
        width: 200px;
        text-align: center;
    }

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

    .advisory-board-grid {
        grid-template-columns: 1fr;
    }

    .image-placeholder {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .organizer-photo {
        width: 80px;
        height: 80px;
    }

    .hero {
        min-height: 100vh;
        padding-top: 0;
    }

    .page-header {
        padding: 100px 0 40px;
    }

    .faq-content {
        max-width: 100%;
        padding: 0 1rem;
    }

    .faq-item {
        padding: 1rem;
    }

    .registration-banner {
        flex-direction: column;
        padding: 2rem 1.5rem;
        gap: 1.5rem;
    }

    .registration-icon i {
        font-size: 3rem;
    }

    .registration-content h2 {
        font-size: 1.4rem;
    }

    .registration-content p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-top: 90px;
    }

    .hero-container {
        padding: 0 0.75rem;
    }

    .hero-title {
        font-size: 1.5rem;
        line-height: 1.3;
        margin-bottom: 0.75rem;
    }

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

    .hero-description {
        font-size: 0.95rem;
    }

    .hero-icons {
        font-size: 2.5rem;
        gap: 1rem;
    }

    .hero-dates-title {
        font-size: 1.3rem;
    }

    .hero-date-card h3 {
        font-size: 1rem;
    }

    .hero-date {
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .container {
        padding: 0 15px;
    }

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

    .advisory-board-grid {
        grid-template-columns: 1fr;
    }

    .image-placeholder {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .registration-banner {
        padding: 1.5rem 1rem;
    }

    .registration-content h2 {
        font-size: 1.2rem;
    }

    .registration-btn {
        font-size: 1rem;
        padding: 12px 24px;
    }
}

.hero-text {
    width: 66%;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.simple-contact {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    color: #3e6086;
    background: #f5f7fa;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    margin: 2rem auto 0 auto;
    width: fit-content;
    box-shadow: 0 2px 8px rgba(37,99,235,0.05);
}

.simple-contact i {
    font-size: 1.2rem;
    color: #3e6086;
}

.simple-contact span {
    color: #1e2f43;
    font-weight: 500;
}

.schedule-section {
    background: white;
    padding: 5rem 0;
    min-height: 60vh;
}

.schedule-content {
    max-width: 1200px;
    margin: 0 auto;
}

.schedule-intro {
    margin-bottom: 3rem;
}

.webinar-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #3e6086 0%, #5a7ba3 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(62, 96, 134, 0.3);
}

.webinar-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(62, 96, 134, 0.4);
    background: linear-gradient(135deg, #2d4a66 0%, #3e6086 100%);
}

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

.schedule-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.schedule-timeline::before {
    content: '';
    position: absolute;
    left: 150px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, #3e6086 0%, #5a7ba3 100%);
}

.schedule-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
    align-items: flex-start;
}

.schedule-time {
    min-width: 120px;
    font-weight: 600;
    color: #3e6086;
    font-size: 1.1rem;
    padding-top: 0.5rem;
    text-align: right;
}

.schedule-details {
    flex: 1;
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid #3e6086;
    box-shadow: 0 2px 8px rgba(62, 96, 134, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.schedule-details::before {
    content: '';
    position: absolute;
    left: -35px;
    top: 28px;
    width: 12px;
    height: 12px;
    background: #3e6086;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 2px #3e6086;
}

.schedule-details:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(62, 96, 134, 0.15);
}

.schedule-details h3 {
    color: #1e2f43;
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.schedule-details p {
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.schedule-details p:last-child {
    margin-bottom: 0;
}

.schedule-meta {
    font-size: 0.9rem;
    color: #3e6086;
    font-weight: 500;
    font-style: italic;
}

@media (max-width: 768px) {
    .schedule-timeline::before {
        left: 20px;
    }
    
    .schedule-item {
        flex-direction: column;
        gap: 0.5rem;
        padding-left: 50px;
    }
    
    .schedule-time {
        text-align: left;
        min-width: auto;
    }
    
    .schedule-details::before {
        left: -45px;
    }
}

.papers-section {
    background: white;
    padding: 5rem 0;
}

.papers-content {
    max-width: 1200px;
    margin: 0 auto;
}

.papers-intro {
    margin-bottom: 4rem;
}

.best-papers-section,
.spotlight-papers-section,
.accepted-papers-section {
    margin-bottom: 5rem;
}

.papers-category-title {
    font-size: 2rem;
    font-weight: 700;
    color: #1e2f43;
    margin-bottom: 1rem;
    text-align: center;
}

.papers-category-title i {
    color: #3e6086;
    margin-right: 0.5rem;
}

.category-description {
    text-align: center;
    font-size: 1.1rem;
    color: #64748b;
    margin-bottom: 3rem;
}

.paper-card {
    background: white;
    border: 2px solid #e8edf3;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.paper-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(62, 96, 134, 0.15);
    border-color: #3e6086;
}

.paper-card.best-paper {
    border-left: 6px solid #FFD700;
    background: linear-gradient(to right, rgba(255, 215, 0, 0.05) 0%, white 100%);
}

.paper-card.spotlight-paper {
    border-left: 4px solid #3e6086;
}

.paper-badge {
    display: inline-block;
    background: #3e6086;
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.paper-card.best-paper .paper-badge {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: #1e2f43;
}

.paper-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e2f43;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.paper-authors {
    font-size: 0.95rem;
    color: #64748b;
    margin-bottom: 1rem;
    font-style: italic;
}

.paper-abstract {
    font-size: 1rem;
    color: #475569;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

.paper-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: #f8fafc;
    color: #3e6086;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid #e2e8f0;
}

.paper-link:hover {
    background: #3e6086;
    color: white;
    transform: translateY(-2px);
}

.paper-link i {
    font-size: 0.9rem;
}

.papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.papers-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.paper-item {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 3px solid #cbd5e1;
    transition: all 0.2s ease;
}

.paper-item:hover {
    background: white;
    border-left-color: #3e6086;
    box-shadow: 0 2px 8px rgba(62, 96, 134, 0.08);
}

.paper-item-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e2f43;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.paper-item-authors {
    font-size: 0.9rem;
    color: #64748b;
    margin-bottom: 0.75rem;
    font-style: italic;
}

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

.paper-item-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    background: white;
    color: #3e6086;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid #e2e8f0;
}

.paper-item-links a:hover {
    background: #3e6086;
    color: white;
}

.paper-item-links i {
    font-size: 0.8rem;
}

@media (max-width: 768px) {
    .papers-grid {
        grid-template-columns: 1fr;
    }
    
    .paper-card {
        padding: 1.5rem;
    }
    
    .paper-title {
        font-size: 1.3rem;
    }
    
    .papers-category-title {
        font-size: 1.5rem;
    }
}