* {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

:root {
    --primary-blue: #3D8BFF;
    --accent-purple: #8A4FFF;
    --accent-cyan: #00DBDE;
    --accent-pink: #FF5E94;
    --dark-blue: #1E56D9;
    --light-bg: #F8FAFF;
    --card-bg: rgba(255, 255, 255, 0.9);
}

body {
    overflow-x: hidden;
}

.section {
    position: relative;
    overflow: hidden;
}

.pd-hero-banner {
    width: 100%;
    height: 450px;
    overflow: hidden;
}

.pd-hero-banner__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pd-intro {
    background-color: #fff;
    padding: 80px 0;
    text-align: center;
}

.pd-intro .content-wrapper {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.pd-intro.active .content-wrapper {
    opacity: 1;
    transform: translateY(0);
}

.pd-intro__title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    font-weight: bold;
    position: relative;
    padding-bottom: 1.5rem;
    color: var(--dark-blue)
}

.pd-intro__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
}

.pd-intro__subtitle {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
}

.content-wrapper {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.content-wrapper.active {
    opacity: 1;
    transform: translateY(0);
}

.modules-section {
    padding: 80px 20px;
    background: var(--light-bg);
    position: relative;
    z-index: 1;
}

.modules-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* background: url('/images/bg5.png') center/cover; */
    opacity: 0.05;
    z-index: 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    position: relative;
    color: var(--dark-blue);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
    border-radius: 2px;
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.module-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    color: #333;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out, box-shadow 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(30, 86, 217, 0.1);
    opacity: 0;
    transform: translateY(30px);
}

.modules-section.active .module-card {
    opacity: 1;
    transform: translateY(0);
}

.modules-section.active .module-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(30, 86, 217, 0.2);
}

.modules-section.active .module-card:nth-child(1) { transition-delay: 0.1s; }
.modules-section.active .module-card:nth-child(2) { transition-delay: 0.2s; }
.modules-section.active .module-card:nth-child(3) { transition-delay: 0.3s; }
.modules-section.active .module-card:nth-child(4) { transition-delay: 0.4s; }
.modules-section.active .module-card:nth-child(5) { transition-delay: 0.5s; }
.modules-section.active .module-card:nth-child(6) { transition-delay: 0.6s; }
.modules-section.active .module-card:nth-child(7) { transition-delay: 0.7s; }
.modules-section.active .module-card:nth-child(8) { transition-delay: 0.8s; }

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
    z-index: 1;
}

.module-card:hover::before {
    transform: scaleX(1);
}

.module-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-blue);
    object-fit: cover;
    border-radius: 10px;
    display: block;
    transition: transform 0.4s ease-in-out;
}

.module-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.module-desc {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.5;
}

.real-world-section {
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
    background: #ffffff;
    color: #333;
}

.real-world-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 50px;
}

.real-world-text, .real-world-image {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.real-world-section.active .real-world-text {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.2s;
}

.real-world-section.active .real-world-image {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.4s;
}

.real-world-text {
    flex: 1;
    min-width: 300px;
}

.real-world-text h3 {
    font-size: 2.5rem;
    margin-bottom: 25px;
    color: var(--primary-blue);
    position: relative;
    display: inline-block;
}

.real-world-text h3::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-pink));
    border-radius: 2px;
    color: var(--primary-blue);
}

.real-world-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 30px;
    max-width: 600px;
}

.benefits-list {
    list-style: none;
    margin-top: 30px;
    padding-left: 0;
}

.benefits-list li {
    margin-bottom: 15px;
    padding-left: 30px;
    position: relative;
}

.benefits-list li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-cyan);
}

.real-world-image {
    flex: 1;
    min-width: 300px;
    position: relative;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    border-radius: 10px;
    overflow: hidden;
}

.carousel-wrapper {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.carousel-slide {
    flex-shrink: 0;
    width: 100%;
}

.carousel-slide img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 10px;
    display: block;
    transition: transform 0.4s ease-in-out;
}

.carousel-slide:hover img {
    transform: scale(1.05);
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.2);
    color: var(--dark-blue);
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    border-radius: 50%; 
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    z-index: 10;
    padding-bottom: 5px;
}

.carousel-btn:hover {
    background: rgba(0, 0, 0, 0.2);
}

.prev-btn {
    left: 15px;
}

.next-btn {
    right: 15px;
}

.real-world-image::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: linear-gradient(45deg, var(--accent-cyan), var(--accent-pink), var(--accent-purple));
    z-index: -1;
    filter: blur(20px);
    opacity: 0.3;
}

.explore-button {
    display: inline-block;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
    color: white;
    text-decoration: none;
    padding: 14px 30px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 8px 20px rgba(61, 139, 255, 0.4);
}

.explore-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(61, 139, 255, 0.6);
}

.tech-bubble {
    position: absolute;
    background: rgba(138, 79, 255, 0.1);
    border-radius: 50%;
    backdrop-filter: blur(10px);
    z-index: 1;
}

.bubble2 {
    top: 65%;
    left: 90%;
    width: 150px;
    height: 150px;
    background: rgba(61, 139, 255, 0.1);
}

.bubble3 {
    top: 80%;
    left: 10%;
    width: 70px;
    height: 70px;
    background: rgba(255, 94, 148, 0.1);
}

@media (max-width: 768px) {
    .module-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
    
    .real-world-content {
        flex-direction: column;
    }
}