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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: #0f172a;
    background: radial-gradient(circle at 20% 10%, #eef4ff 0%, #f7f9fc 45%, #ffffff 100%);
    min-height: 100vh;
}

.top-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
}

.brand img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

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

.btn {
    text-decoration: none;
    border-radius: 10px;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 700;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, #2563eb, #4f46e5);
    color: #fff;
}

.btn-light {
    background: #fff;
    border: 1px solid #d1d5db;
    color: #111827;
}

.btn-outline {
    border: 1px solid #3b82f6;
    color: #2563eb;
    background: rgba(255, 255, 255, 0.8);
}

.user-name {
    font-size: 14px;
    color: #334155;
    background: #eef2ff;
    border-radius: 999px;
    padding: 8px 12px;
}

.hero-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 60px;
}

.hero {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(79, 70, 229, 0.08));
    border: 1px solid #dbeafe;
    border-radius: 18px;
    padding: 40px;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 42px;
    line-height: 1.25;
    max-width: 900px;
    margin-bottom: 16px;
}

.hero p {
    color: #334155;
    font-size: 18px;
    line-height: 1.8;
    max-width: 820px;
    margin-bottom: 20px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
}

.feature-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    padding: 18px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.feature-card p {
    color: #475569;
    line-height: 1.7;
    font-size: 14px;
}

.section-block {
    margin-top: 24px;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 24px;
}

.section-head {
    margin-bottom: 14px;
}

.section-head h2 {
    font-size: 30px;
    margin-bottom: 6px;
}

.section-head p {
    color: #64748b;
    font-size: 15px;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
}

.demo-video-card {
    border: 1px solid #dbeafe;
    border-radius: 12px;
    padding: 12px;
    background: #f8fbff;
}

.demo-video-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 10px;
    border: 1px dashed #93c5fd;
    background: linear-gradient(135deg, #eff6ff, #eef2ff);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1d4ed8;
    font-weight: 700;
    margin-bottom: 10px;
}

.demo-video-card p {
    color: #475569;
    font-size: 14px;
    line-height: 1.6;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 12px;
}

.case-card {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 14px;
    background: #fff;
}

.case-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.case-card p {
    color: #475569;
    font-size: 14px;
    line-height: 1.7;
}

.cta-section {
    margin-top: 24px;
    border-radius: 16px;
    padding: 28px;
    color: #fff;
    background: linear-gradient(135deg, #1d4ed8, #4338ca);
}

.cta-section h2 {
    font-size: 32px;
    margin-bottom: 8px;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    margin-bottom: 16px;
}

.cta-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero {
        padding: 24px;
    }

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

    .hero p {
        font-size: 15px;
    }

    .section-head h2 {
        font-size: 24px;
    }

    .cta-section h2 {
        font-size: 24px;
    }
}