.cases-hero {
    background: url('https://cdn.meeting.tencent.com/pro/M2ZmYWRkMjYtYjc3Ni00ZWI5LWFhOTItNzFhM2Y3ZmZiNWM5') no-repeat center center;
    background-size: cover;
    padding: 80px 0;
    text-align: center;
    position: relative;
}

.cases-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.cases-hero h1,
.cases-hero p,
.cases-hero .cta-buttons {
    position: relative;
    z-index: 1;
    color: #fff;
}

.cases-hero h1 {
    font-size: 36px;
    margin-bottom: 20px;
}

.cases-hero p {
    font-size: 16px;
    max-width: 800px;
    margin: 0 auto 30px;
    line-height: 1.6;
}

.cases-hero .cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.cases-hero .btn {
    padding: 12px 30px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.cases-hero .btn.primary {
    background: #2B81FF;
    color: #fff;
    border: none;
}

.cases-hero .btn.primary:hover {
    background: #1a70ee;
}

.cases-hero .btn.outline {
    border: 2px solid #fff;
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.cases-hero .btn.outline:hover {
    background: rgba(255, 255, 255, 0.2);
}

.cases-grid {
    padding: 60px 0;
    max-width: 1200px;
    margin: 0 auto;
}

.cases-grid h2 {
    text-align: center;
    font-size: 32px;
    color: #333;
    margin-bottom: 40px;
    font-weight: bold;
}

.cases-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding: 0 20px;
}

.case-item {
    text-align: center;
}

.case-item .img_wrapper {
    width: 100%;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    transition: all 0.3s ease;
}

.case-item .img_wrapper:hover {
    box-shadow: none;
    transform: none;
}

.case-item img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

.case-item .item_title {
    font-size: 16px;
    color: #333;
    margin: 0;
    line-height: 1.5;
}

@media screen and (max-width: 1200px) {
    .cases-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .cases-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .cases-hero {
        padding: 40px 0;
    }
    
    .cases-hero h1 {
        font-size: 28px;
    }

    .case-item .img_wrapper {
        height: 100px;
    }

    .case-item .item_title {
        font-size: 14px;
    }
}