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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #fff;
    background: #0d1117;
    min-height: 100vh;
}

header {
    background: #161b22;
    padding: 15px 0;
    border-bottom: 1px solid #30363d;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    background: #388bfd;
    padding: 5px 10px;
    border-radius: 5px;
    font-weight: bold;
    font-size: 14px;
}

.logo-text {
    font-size: 20px;
    font-weight: bold;
    color: #fff;
}

.nav {
    display: flex;
    gap: 35px;
}

.nav a {
    color: #8b949e;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.nav a:hover {
    color: #fff;
}

.header-buttons {
    display: flex;
    gap: 12px;
}

.btn {
    display: inline-block;
    padding: 10px 22px;
    border-radius: 6px;
    font-weight: bold;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    cursor: pointer;
}

.btn-blue {
    background: #388bfd;
    color: #fff;
    border: 1px solid #388bfd;
}

.btn-blue:hover {
    background: #2563eb;
    border-color: #2563eb;
}

.btn-orange {
    background: #f59e0b;
    color: #161b22;
    border: 1px solid #f59e0b;
}

.btn-orange:hover {
    background: #d97706;
    border-color: #d97706;
}

.hero {
    background: linear-gradient(180deg, #161b22 0%, #0d1117 100%);
    padding: 60px 0;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    width: 100%;
    text-align: center;
}

.hero-content h1 {
    font-size: 36px;
    font-weight: bold;
    color: #fff;
    margin-bottom: 15px;
}

.hero-content h2 {
    font-size: 28px;
    font-weight: bold;
    color: #388bfd;
    margin-bottom: 20px;
}

.hero-content p {
    color: #8b949e;
    font-size: 15px;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-image {
    margin-top: 40px;
}

.hero-image img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.advantages {
    background: #161b22;
    padding: 60px 0;
}

.advantages h2 {
    text-align: center;
    font-size: 24px;
    color: #fff;
    margin-bottom: 40px;
}

.advantages-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s;
}

.advantage-card:hover {
    border-color: #388bfd;
    box-shadow: 0 0 20px rgba(56, 139, 253, 0.2);
}

.advantage-icon {
    font-size: 36px;
    margin-bottom: 15px;
}

.advantage-card h3 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 10px;
}

.advantage-card p {
    color: #8b949e;
    font-size: 14px;
    line-height: 1.6;
}

.interface {
    background: #0d1117;
    padding: 60px 0;
}

.interface h2 {
    text-align: center;
    font-size: 24px;
    color: #fff;
    margin-bottom: 40px;
}

.interface-image {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 30px;
}

.interface-image img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.features {
    background: #161b22;
    padding: 60px 0;
}

.features h2 {
    text-align: center;
    font-size: 24px;
    color: #fff;
    margin-bottom: 40px;
}

.features-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 20px;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 10px;
    padding: 20px;
    transition: all 0.3s;
}

.feature-item:hover {
    border-color: #388bfd;
}

.feature-icon {
    font-size: 28px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(56, 139, 253, 0.1);
    border-radius: 10px;
}

.feature-info h3 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 5px;
}

.feature-info p {
    color: #8b949e;
    font-size: 13px;
}

.features-image img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.system {
    background: #0d1117;
    padding: 60px 0;
}

.system h2 {
    text-align: center;
    font-size: 24px;
    color: #fff;
    margin-bottom: 40px;
}

.system-grid {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.system-card {
    background: #161b22;
    border: 1px solid #388bfd;
    border-radius: 12px;
    padding: 35px;
    text-align: center;
}

.system-card h3 {
    color: #fff;
    font-size: 20px;
    margin-bottom: 20px;
}

.system-badge {
    display: inline-block;
    background: #388bfd;
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    margin: 5px;
}

.faq {
    background: #161b22;
    padding: 60px 0;
}

.faq h2 {
    text-align: center;
    font-size: 24px;
    color: #fff;
    margin-bottom: 40px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 30px;
}

.faq-item {
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
    transition: background 0.3s;
}

.faq-question:hover {
    background: #161b22;
}

.faq-question span:first-child {
    color: #fff;
    font-size: 15px;
}

.faq-arrow {
    color: #8b949e;
    font-size: 12px;
    transition: transform 0.3s;
}

.faq-question.active .faq-arrow {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 25px 20px;
    color: #8b949e;
    font-size: 14px;
    line-height: 1.6;
    display: none;
}

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

.cta {
    background: #0d1117;
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid #30363d;
}

.cta h2 {
    font-size: 28px;
    color: #fff;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

footer {
    background: #161b22;
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid #30363d;
}

footer p {
    color: #8b949e;
    font-size: 13px;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #388bfd;
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: none;
    transition: all 0.3s;
    z-index: 1000;
}

.back-to-top:hover {
    background: #2563eb;
    transform: scale(1.1);
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        gap: 15px;
        justify-content: center;
    }

    .nav {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-content h2 {
        font-size: 22px;
    }

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

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

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