/* Our Expertise Section */
#ourExpertise {
    height:100vh;
    background: var(--black-light);
    padding: 100px 20px 60px;
    position: relative;
      overflow-y: auto; /* Scroll internally if content overflows */
      padding-top: 260px;
}


#expertiseHeading {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--gold);
    position: relative;
    animation: glow 2s infinite alternate;
}

#expertiseHeading::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--gold);
}

#expertiseHeading span {
    display: block;
    font-size: 1.5rem;
    margin-top: 10px;
    color: var(--gold);
    animation: glow 2s infinite alternate;
}
@keyframes glow {
  from {
    text-shadow: 0 0 5px var(--gold-dark), 0 0 10px var(--gold-light);
  }
  to {
    text-shadow: 0 0 15px var(--gold), 0 0 30px var(--gold-light);
  }
}

.expertise-area {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
    width: 99%;
    margin: 0 auto;
    padding: 0 20px;
}

.expertise-categories {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.category-button {
    padding: 15px 20px;
    text-align: left;
    background: var(--gray-dark);
    border: 1px solid rgba(212, 175, 55, 0.1);
    color: var(--light);
    font-family: 'Montserrat', sans-serif;
    font-weight: 500;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.category-button:hover {
    border-color: rgba(212, 175, 55, 0.3);
    color: var(--gold-light);
}

.category-button.active {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--gold);
    color: var(--gold);
    font-weight: 600;
}

.category-button.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--gold);
}

.expertise-details {
    background: var(--gray-dark);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(212, 175, 55, 0.2);
}

.expertise-entry {
    display: none;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.expertise-entry.active {
    display: block;
}

.title-cn {
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: 10px;
    animation: glow 2s infinite alternate;
}

.title-en {
    font-size: 1.2rem;
    color: var(--gold);
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 1px;
    animation: glow 2s infinite alternate;
}


.expertise-entry p {
    color: var(--light-gray);
    margin-bottom: 30px;
    line-height: 1.8;
}

.expertise-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.expertise-images img {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.expertise-images img:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    border-color: var(--gold);
}

/* Responsive Design */
@media (max-width: 900px) {
    #ourExpertise{
        margin-top:80px;
    }
    .expertise-area {
        grid-template-columns: 1fr;
    }
    
    .expertise-categories {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .category-button {
        flex: 1;
        min-width: calc(50% - 10px);
    }
}

@media (max-width: 600px) {
    .category-button {
        min-width: 100%;
    }
    
    .expertise-images {
        grid-template-columns: 1fr;
    }
}

/* Lightbox Styles */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s ease;
}

.lightbox-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: center;
    align-items: center;
}

.lightbox-img {
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.6);
}

.lightbox-caption {
    color: var(--light);
    text-align: center;
    margin-top: 15px;
    font-size: 1.1rem;
    max-width: 80%;
    background: rgba(0, 0, 0, 0.7);
    padding: 8px 15px;
    border-radius: 20px;
}

.lightbox-close {
    position: absolute;
    top: 25px;
    right: 30px;
    color: var(--light);
    font-size: 2.5rem;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(0, 0, 0, 0.5);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.lightbox-close:hover {
    color: var(--gold);
    transform: scale(1.1);
    background: rgba(0, 0, 0, 0.7);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    transform: translateY(-50%);
}

.lightbox-prev, .lightbox-next {
    color: var(--light);
    font-size: 2.5rem;
    cursor: pointer;
    opacity: 0.9;
    transition: var(--transition);
    background: rgba(0, 0, 0, 0.5);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.lightbox-prev:hover, .lightbox-next:hover {
    opacity: 1;
    color: var(--gold);
    transform: scale(1.1);
    background: rgba(0, 0, 0, 0.7);
}

.quick-view-btn {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(212, 175, 55, 0.8);
    color: var(--black-light);
    border: none;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    opacity: 1;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    min-width: 120px;
    justify-content: center;
}

.quick-view-btn:hover {
    background: var(--gold);
    color: var(--black);
    transform: translateX(-50%) scale(1.05);
}

.quick-view-btn::before {
    content: '🔍';
    font-size: 1rem;
}

.expertise-images .img-container {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.expertise-images .img-container:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

@media (max-width: 900px) {
    .lightbox-img {
        max-width: 95%;
    }
    
    .lightbox-caption {
        font-size: 1rem;
        padding: 6px 12px;
    }
    
    .lightbox-close {
        top: 15px;
        right: 20px;
        font-size: 3rem;
        width: 40px;
        height: 40px;
    }
    
    .lightbox-prev, .lightbox-next {
        font-size: 2rem;
        width: 50px;
        height: 50px;
    }
    
    .quick-view-btn {
        font-size: 0.8rem;
        padding: 6px 12px;
        min-width: 110px;
    }
}

@media (max-width: 600px) {
    .lightbox-img {
        max-width: 98%;
    }
    
    .lightbox-caption {
        font-size: 0.9rem;
        max-width: 90%;
    }
    
    .lightbox-prev, .lightbox-next {
        font-size: 1.8rem;
        width: 45px;
        height: 45px;
    }
    
    .quick-view-btn {
        bottom: 10px;
        font-size: 0.7rem;
        padding: 5px 10px;
        min-width: 100px;
    }
    
    .quick-view-btn::before {
        font-size: 0.8rem;
    }
}