.reveal .slides section {
    height: 100vh;
    padding: 0 !important;
}

.intro-section {
    min-height: 100vh;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, rgba(66,133,244,0.1), rgba(52,168,83,0.1));
    position: relative;
    overflow: visible;
}

.intro-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}

.title-container {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title.glowing-text {
    font-size: 3.5rem;
    background: linear-gradient(120deg, #4285f4, #34a853);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.title-underline {
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, #4285f4, #34a853);
    margin: 0 auto;
    border-radius: 2px;
}

.definition-container {
    text-align: center;
    margin-bottom: 5rem;
}

.main-definition {
    font-size: 2.5rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 1rem;
    color: #fff;
}

.sub-definition {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.7);
}

.highlight-text {
    background: linear-gradient(120deg, #4285f4, #34a853);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 4rem 0;
    width: 100%;
    position: relative;
    z-index: 10;
}

.feature-item {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    z-index: 11;
}

.feature-item:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
}

.feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.feature-item h3 {
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: 1rem;
}

.feature-item p {
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
}

.app-showcase {
    text-align: center;
}

.showcase-title {
    font-size: 2rem;
    color: #fff;
    margin-bottom: 2rem;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.app-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.app-item:hover {
    transform: translateY(-5px);
}

.app-item img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.app-item span {
    color: #fff;
    font-size: 1rem;
}

/* Animation classes */
[data-aos] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .intro-section {
        padding: 3rem 1rem;
    }

    .section-title.glowing-text {
        font-size: 2.5rem;
    }

    .main-definition {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Thêm style mới để đảm bảo hiển thị */
.reveal .slides section .feature-item {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
}

/* Vô hiệu hóa một số style mặc định của reveal.js */
.reveal .slides section {
    transform-style: flat !important;
}

/* Thêm vào cuối file CSS */
.reveal .slides section .intro-section {
    display: block !important;
    opacity: 1 !important;
}

.reveal .slides section .features-grid {
    display: grid !important;
    opacity: 1 !important;
}

.reveal .slides section .feature-item {
    display: block !important;
    opacity: 1 !important;
}