.about-banner {
    position: relative;
    width: 100%;
    margin-top: 80px;
}

.about-banner>img {
    width: 100%;
    height: auto;
    display: block;
}

.about-banner-content {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    color: var(--color-text-primary);
}

.about-banner-title {
    font-size: 72px;
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.about-banner-subtitle {
    font-size: 44px;
    margin-bottom: var(--space-lg);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.about-banner-desc {
    font-size: var(--text-xl);
    opacity: 0.6;
}

.section-divider {
    width: 60px;
    height: 3px;
    background: #6d7280;
    margin: var(--space-md) auto 0;
    border-radius: 2px;
}

.about-intro {
    background: var(--color-white);
    padding: var(--space-5xl) 0;
}

.about-development {
    background: var(--gradient-primary);
    padding: var(--space-5xl) 0;
}

.about-certificates {
    background: var(--color-white);
    padding: var(--space-5xl) 0;
}

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

.certificates-text {
    text-align: left;
    margin-bottom: var(--space-3xl);
}

.certificates-text p {
    font-size: 16px;
    font-weight: 400;
    line-height: 34px;
    color: #3D3F45;
    margin-bottom: var(--space-md);
}

.certificates-text p:last-child {
    margin-bottom: 0;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.certificate-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.certificate-card img {
    width: 100%;
    height: auto;
    display: block;
}