:root {
    --primary: #2196F3;
    --primary-dark: #1976D2;
    --primary-light: #64B5F6;
    --secondary: #FF5722;
    --background: #FFFFFF;
    --background-alt: #F5F7FA;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --gradient: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
    --gradient-radial: radial-gradient(circle, rgba(33, 150, 243, 0.3) 0%, transparent 70%);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-soft: 0 8px 32px rgba(33, 150, 243, 0.15);
    --shadow-medium: 0 12px 48px rgba(33, 150, 243, 0.2);
    --shadow-strong: 0 20px 60px rgba(33, 150, 243, 0.25);
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 28px;
}

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

html {
    scroll-behavior: smooth;
}

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

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient);
    z-index: 10001;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 10px rgba(33, 150, 243, 0.5);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(33, 150, 243, 0.1);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.navbar.scrolled {
    box-shadow: var(--shadow-soft);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width var(--transition-medium);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #f8fbff 0%, #e8f4fd 50%, #f0f7ff 100%);
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 24px;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.title-gradient {
    background: linear-gradient(135deg, #2196F3 0%, #1976D2 50%, #1565C0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 8s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-medium);
    cursor: pointer;
    border: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

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

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

.btn-secondary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-light);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 20px; }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.services {
    background: var(--background);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.service-card {
    background: white;
    padding: 40px 32px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: all var(--transition-medium);
    border: 1px solid rgba(33, 150, 243, 0.1);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: block;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: transform var(--transition-medium);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
    border-color: transparent;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    transition: transform var(--transition-medium);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: gap var(--transition-fast);
}

.service-link:hover {
    gap: 10px;
}

.service-link::after {
    content: '\2192';
}

.features {
    background: var(--background-alt);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.feature-card {
    background: white;
    padding: 40px 32px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: all var(--transition-medium);
    border: 1px solid rgba(33, 150, 243, 0.1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: transform var(--transition-medium);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
    border-color: transparent;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    transition: transform var(--transition-medium);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.sponsor {
    background: var(--background);
}

.sponsor-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.sponsor-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.sponsor-info p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.sponsor-benefits {
    list-style: none;
}

.sponsor-benefits li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.sponsor-benefits li svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
    flex-shrink: 0;
}

.sponsor-qrcodes {
    display: flex;
    gap: 32px;
    justify-content: center;
}

.qrcode-card {
    background: white;
    padding: 24px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    border: 1px solid rgba(33, 150, 243, 0.1);
    transition: all var(--transition-medium);
}

.qrcode-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.qrcode-card img {
    width: 180px;
    height: 180px;
    border-radius: var(--border-radius);
    margin-bottom: 12px;
}

.qrcode-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.contact {
    background: var(--background-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.contact-card {
    background: white;
    padding: 32px;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(33, 150, 243, 0.1);
    transition: all var(--transition-medium);
    text-decoration: none;
    display: block;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: transparent;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.15) 0%, rgba(33, 150, 243, 0.05) 100%);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
    transition: transform var(--transition-medium);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-card:hover .contact-icon {
    transform: scale(1.1);
}

.contact-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    word-break: break-all;
}

.links {
    background: var(--background);
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.link-card {
    background: white;
    padding: 32px;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(33, 150, 243, 0.1);
    transition: all var(--transition-medium);
    position: relative;
    text-decoration: none;
    display: block;
}

.link-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: transparent;
}

.link-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.15) 0%, rgba(33, 150, 243, 0.05) 100%);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
    transition: transform var(--transition-medium);
}

.link-icon svg {
    width: 24px;
    height: 24px;
}

.link-card:hover .link-icon {
    transform: scale(1.1);
}

.link-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.link-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: gap var(--transition-fast);
}

.link-arrow:hover {
    gap: 10px;
}

.link-arrow::after {
    content: '\2192';
}

.footer {
    background: #1a1f2e;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo {
    width: 40px;
    height: 40px;
}

.footer-logo svg {
    width: 100%;
    height: 100%;
}

.footer-brand span {
    font-size: 1.25rem;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 80px;
    flex-wrap: wrap;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.95rem;
    margin-bottom: 12px;
    transition: all var(--transition-fast);
    position: relative;
}

.footer-column a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary);
    transition: width var(--transition-fast);
}

.footer-column a:hover {
    color: white;
}

.footer-column a:hover::after {
    width: 100%;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.footer-disclaimer {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.8rem;
    max-width: 600px;
    margin: 0 auto;
}

[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1) rotate(0);
}

[data-aos="fade-up"] {
    transform: translateY(40px);
}

[data-aos="fade-down"] {
    transform: translateY(-40px);
}

[data-aos="fade-left"] {
    transform: translateX(40px);
}

[data-aos="fade-right"] {
    transform: translateX(-40px);
}

[data-aos="zoom-in"] {
    transform: scale(0.8);
}

[data-aos="zoom-out"] {
    transform: scale(1.2);
}

[data-aos="flip-up"] {
    transform: perspective(1000px) rotateX(10deg) translateY(20px);
}

[data-aos="flip-down"] {
    transform: perspective(1000px) rotateX(-10deg) translateY(-20px);
}

[data-aos="slide-up"] {
    transform: translateY(60px);
}

[data-aos="slide-left"] {
    transform: translateX(60px);
}

[data-aos="slide-right"] {
    transform: translateX(-60px);
}

[data-aos="fade-up-scale"] {
    transform: translateY(30px) scale(0.95);
}

[data-aos="zoom-in-rotate"] {
    transform: scale(0.8) rotate(-5deg);
}

[data-aos-delay="50"] { transition-delay: 50ms; }
[data-aos-delay="100"] { transition-delay: 100ms; }
[data-aos-delay="150"] { transition-delay: 150ms; }
[data-aos-delay="200"] { transition-delay: 200ms; }
[data-aos-delay="250"] { transition-delay: 250ms; }
[data-aos-delay="300"] { transition-delay: 300ms; }
[data-aos-delay="350"] { transition-delay: 350ms; }
[data-aos-delay="400"] { transition-delay: 400ms; }
[data-aos-delay="450"] { transition-delay: 450ms; }
[data-aos-delay="500"] { transition-delay: 500ms; }
[data-aos-delay="550"] { transition-delay: 550ms; }
[data-aos-delay="600"] { transition-delay: 600ms; }
[data-aos-delay="650"] { transition-delay: 650ms; }
[data-aos-delay="700"] { transition-delay: 700ms; }
[data-aos-delay="750"] { transition-delay: 750ms; }
[data-aos-delay="800"] { transition-delay: 800ms; }

[data-aos-duration="fast"] { transition-duration: 0.4s; }
[data-aos-duration="normal"] { transition-duration: 0.6s; }
[data-aos-duration="slow"] { transition-duration: 0.8s; }

[data-aos-easing="ease-out-cubic"] { transition-timing-function: cubic-bezier(0.33, 1, 0.68, 1); }
[data-aos-easing="ease-in-out-cubic"] { transition-timing-function: cubic-bezier(0.65, 0, 0.35, 1); }
[data-aos-easing="ease-out-back"] { transition-timing-function: cubic-bezier(0.34, 1.56, 0.64, 1); }

.section-header[data-aos] {
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.section-title {
    overflow: hidden;
}

.section-title span {
    display: inline-block;
    opacity: 0;
    transform: translateY(100%);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.section-title.animate span {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 992px) {
    .sponsor-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .sponsor-qrcodes {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-medium);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-medium);
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

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

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .services-grid,
    .features-grid,
    .contact-grid,
    .links-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        flex-direction: column;
        gap: 32px;
    }

    .sponsor-qrcodes {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    section {
        padding: 60px 0;
    }

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

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

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

    .service-card,
    .feature-card,
    .contact-card,
    .link-card {
        padding: 24px;
    }

    .qrcode-card img {
        width: 150px;
        height: 150px;
    }
}