/* 섹션 공통 스타일 */
.section {
    padding: 80px 0;
}
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.section-title {
    margin-bottom: 50px;
    position: relative;
}
.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: #ff8800;
    margin-bottom: 15px;
    display: inline-block;
}
/* Quantum Dots 소개 섹션 */
.quantum-intro {
    margin-bottom: 50px;
}
.intro-text {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 40px;
    color: #333;
}
.qd-showcase {
    display: flex;
    gap: 50px;
    align-items: center;
    margin-bottom: 40px;
}
.qd-image {
    flex: 1;
}
.qd-samples {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    width: 300px;
}
.qd-features {
    flex: 1;
}
.feature-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #333;
}
.feature-list {
    list-style: none;
}
.feature-list li {
    font-size: 18px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}
.bullet {
    color: #ff8800;
    font-size: 24px;
    margin-right: 15px;
}
.conclusion-text {
    font-size: 18px;
    line-height: 1.6;
}
/* 응용 분야 섹션 */
.application-intro {
    margin-bottom: 50px;
}
.app-intro-text {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 30px;
}
.app-categories {
    background-color: #f9f9f9;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 50px;
}
.app-category-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
}
.category-arrow {
    font-size: 20px;
    color: #ff8800;
    margin-bottom: 20px;
}
.application-grid {
    display: flex;
    gap: 30px;
}
.app-column {
    flex: 1;
}
.app-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}
.app-icon {
    color: #ff8800;
    font-size: 20px;
    margin-right: 10px;
}
.app-name {
    font-size: 16px;
}
/* 핵심 혁신 기술 */
.core-technologies {
    background-color: #f9f9f9;
    padding: 30px;
    border-radius: 10px;
}
.core-tech-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 30px;
    line-height: 1.4;
}
.tech-item {
    display: flex;
    margin-bottom: 30px;
}
.tech-number {
    font-size: 24px;
    font-weight: 700;
    color: #ff8800;
    margin-right: 20px;
}
.tech-content {
    flex: 1;
}
.tech-content p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 15px;
}
.tech-detail {
    font-size: 14px;
    color: #555;
    padding-left: 20px;
    line-height: 1.5;
}
/* 홍보 영상 섹션 */
.video-container {
    max-width: 900px;
    margin: 0 auto;
}
.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 비율 */
    height: 0;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}
#promotion-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
}
.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.3s ease;
}
.play-button {
    background-color: #8DC73F;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.play-button:hover {
    background-color: #ff8800;
    transform: scale(1.05);
}
.video-overlay.playing {
    opacity: 0;
    pointer-events: none;
}