/* AI Development Section */
.ai-development-section {
    min-height: 100vh;
    padding: 100px 20px;
    background: linear-gradient(135deg, #f0f8ff 0%, #ffffff 100%);
    position: relative;
    scroll-snap-align: start;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-headline {
    font-size: 2.5rem;
    color: #247dff;
    font-weight: bold;
    margin-bottom: 30px;
    position: relative;
}

.section-headline::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(45deg, #247dff, #4a9eff);
    border-radius: 2px;
}

.ai-intro {
    max-width: 1000px;
    margin: 0 auto 50px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(36, 125, 255, 0.1);
    border: 1px solid rgba(36, 125, 255, 0.1);
    opacity: 0; /* 초기 상태 투명 */
}

.ai-intro p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #666;
    margin: 0;
}

.ai-intro strong {
    color: #247dff;
    font-weight: 600;
}

.workflow-diagram {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin: 0 auto 60px auto;
    padding: 40px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 25px;
    box-shadow: 0 15px 50px rgba(36, 125, 255, 0.08);
    width: 1250px;
    max-width: 95%;
    opacity: 0; /* 초기 상태 투명 */
}

.workflow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-width: 120px;
    opacity: 0; /* 초기 상태 투명 - JS 애니메이션 대기 */
    transition: all 0.3s ease;
    cursor: pointer;
}

.workflow-step:hover {
    transform: translateY(-8px) scale(1.05);
}

.workflow-step:hover .step-icon {
    transform: rotateY(10deg);
    box-shadow: 0 12px 35px rgba(36, 125, 255, 0.4);
}

.step-icon {
    font-size: 2rem;
    margin-bottom: 10px;
    padding: 15px;
    background: linear-gradient(135deg, #247dff, #4a9eff);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 25px rgba(36, 125, 255, 0.3);
    transition: all 0.3s ease;
}

.step-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: #333;
}

.arrow {
    font-size: 1.5rem;
    color: #247dff;
    font-weight: bold;
    margin: 0 10px;
    opacity: 0; /* 초기 상태 투명 */
}

.ai-systems-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 30px;
    max-width: 1250px;
    margin: 0 auto;
}

.ai-system-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(36, 125, 255, 0.1);
    border: 1px solid rgba(36, 125, 255, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    opacity: 0; /* 초기 상태 투명 */
}

.ai-system-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 80px rgba(36, 125, 255, 0.15);
    border-color: rgba(36, 125, 255, 0.2);
}

.system-header {
    text-align: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid rgba(36, 125, 255, 0.1);
}

.system-header h3 {
    font-size: 1.5rem;
    color: #247dff;
    margin-bottom: 8px;
    font-weight: bold;
}

.system-subtitle {
    color: #666;
    font-size: 1rem;
    font-weight: 500;
    margin: 0;
}

.system-details {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 15px;
    background: rgba(36, 125, 255, 0.03);
    border-radius: 12px;
}

.detail-item .label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #247dff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-item .value {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.4;
    font-weight: 500;
}