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

html {
    scroll-behavior: smooth;
}

:root {
    --primary-color: #8b5cf6;
    --primary-dark: #7c3aed;
    --secondary-color: #6366f1;
    --text-white: #ffffff;
    --text-gray: #9ca3af;
    --bg-dark: #0a0a0a;
    --bg-card: #1a1a1a;
    --border-color: #2d2d2d;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.3);
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-white);
    background-color: var(--bg-dark);
    overflow-x: hidden;
}

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

.navbar {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: var(--shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: var(--shadow-glow);
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-white);
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

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

.github-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(139, 92, 246, 0.1);
    transition: all 0.3s;
}

.github-link:hover {
    background: rgba(139, 92, 246, 0.3);
    transform: translateY(-2px);
}

.github-link:hover::after {
    width: 0;
}

.github-link svg {
    color: var(--text-white);
    transition: all 0.3s;
}

.github-link:hover svg {
    color: var(--primary-color);
    filter: drop-shadow(0 0 8px rgba(139, 92, 246, 0.6));
}

.hero {
    padding: 180px 0 120px;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #0a0a0a 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero .container {
    position: relative;
    z-index: 1;
}

.planet-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 500px;
    z-index: 0;
    opacity: 0.6;
}

.planet {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    box-shadow: 0 0 60px rgba(139, 92, 246, 0.6),
                inset 0 0 30px rgba(0, 0, 0, 0.3);
    animation: planetRotate 20s linear infinite;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.orbit::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary-color);
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
}

.orbit-1 {
    width: 200px;
    height: 200px;
    animation: orbitRotate 8s linear infinite;
}

.orbit-2 {
    width: 300px;
    height: 300px;
    animation: orbitRotate 12s linear infinite reverse;
}

.orbit-3 {
    width: 400px;
    height: 400px;
    animation: orbitRotate 16s linear infinite;
}

@keyframes planetRotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes orbitRotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-white) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-gray);
    animation: fadeInUp 1s ease 0.2s backwards;
}

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

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: var(--shadow-glow);
    animation: fadeInUp 1s ease 0.4s backwards;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.5);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 4rem;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.3s;
}

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

.feature-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.5));
}

.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--bg-card);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-white);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 1rem auto;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    text-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.stat-label {
    color: var(--text-gray);
    font-size: 1rem;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 50%;
    padding-right: 40px;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 50%;
    padding-left: 40px;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid var(--bg-dark);
    box-shadow: 0 0 0 3px var(--primary-color);
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 0 3px var(--primary-color); }
    50% { box-shadow: 0 0 0 5px var(--primary-color), 0 0 20px rgba(139, 92, 246, 0.5); }
}

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

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--text-gray);
}

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

.advantage-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-color);
}

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.5));
}

.advantage-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-white);
}

.advantage-card p {
    color: var(--text-gray);
}

.testimonials-wrapper {
    position: relative;
    overflow: hidden;
    margin-top: 3rem;
}

.testimonials {
    display: flex;
    gap: 2rem;
    animation: scroll 30s linear infinite;
    padding: 1rem 0;
}

.testimonials:hover {
    animation-play-state: paused;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.testimonial-card {
    flex: 0 0 350px;
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-color);
}

.testimonial-text {
    font-style: italic;
    color: var(--text-white);
    margin-bottom: 1rem;
}

.testimonial-author {
    color: var(--text-gray);
    font-weight: 500;
}

.testimonials-note {
    text-align: center;
    color: var(--text-gray);
    margin-top: 2rem;
}

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

.faq-item {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    transition: all 0.3s;
}

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

.faq-question {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-white);
}

.faq-answer {
    color: var(--text-gray);
}

.footer {
    background: var(--bg-card);
    color: var(--text-white);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    margin-bottom: 1rem;
    object-fit: cover;
    box-shadow: var(--shadow-glow);
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.footer-brand p {
    color: var(--text-gray);
}

.footer-links h4,
.footer-contact h4 {
    margin-bottom: 1rem;
    color: var(--text-white);
}

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

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: all 0.3s;
}

.footer-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-contact p {
    color: var(--text-gray);
}

.footer-github-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s;
}

.footer-github-link:hover {
    color: var(--text-white);
    text-shadow: 0 0 10px rgba(139, 92, 246, 0.6);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-gray);
}

@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .planet-container {
        width: 300px;
        height: 300px;
        opacity: 0.4;
    }

    .planet {
        width: 80px;
        height: 80px;
    }

    .orbit-1 {
        width: 140px;
        height: 140px;
    }

    .orbit-2 {
        width: 200px;
        height: 200px;
    }

    .orbit-3 {
        width: 260px;
        height: 260px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-features {
        flex-direction: column;
        gap: 1.5rem;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 50px;
        margin-right: 0;
        padding-left: 30px;
        padding-right: 0;
        text-align: left;
    }

    .timeline-content::before {
        left: 20px;
    }

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

    .testimonial-card {
        flex: 0 0 280px;
    }
}