.expertise-section {
    padding: 100px 0;
    font-family: 'Roboto', sans-serif;
}

.expertise-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.expertise-title {
    font-family: 'Roboto Slab', serif;
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #1a1a1a;
}

.expertise-subtitle {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 30px;
    font-style: italic;
    color: #1a1a1a;
}

.expertise-accordion {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.expertise-accordion-item {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.expertise-accordion-header {
    padding: 25px 30px;
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
    border-left: 4px solid transparent;
    transition: all 0.3s ease;
}

.expertise-accordion-header.active {
    background-color: rgba(204, 85, 0, 0.03);
}

.expertise-icon {
    font-size: 24px;
    margin-right: 20px;
    width: 30px;
    text-align: center;
}

.expertise-card-title {
    font-size: 1.4rem;
    font-family: 'Roboto Slab', serif;
    color: #1a1a1a;
    margin: 0;
    flex-grow: 1;
}

.expertise-toggle-icon::before {
    content: '+';
    font-size: 24px;
    color: #cc5500;
}

.expertise-accordion-header.active .expertise-toggle-icon::before {
    content: '−';
}

.expertise-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.expertise-accordion-content.active {
    max-height: 1000px;
}

.expertise-card-inner {
    padding: 0 30px 30px 80px;
    font-size: 1.1rem;
    line-height: 1.7;
    color: #2E2A25;
}

.expertise-card-inner ul {
    padding-left: 20px;
    margin: 0;
}

.expertise-card-inner li {
    margin-bottom: 12px;
}

@media (max-width: 768px) {
    .expertise-title {
        font-size: 2rem;
    }
    .expertise-subtitle {
        font-size: 1.5rem;
    }
    .expertise-card-inner {
        padding: 0 20px 20px 20px;
    }
}