/* 导航栏样式 */
.nav-section {
    padding: 30px 0;
    background-color: #1E293B;
}

.case-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px 0;
    margin: 0 auto;
    max-width: 1200px;
}

.nav-button {
    padding: 12px 24px;
    border: none;
    background-color: #fff;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
    color: #1E293B;
}

.nav-button:hover {
    background-color: #f8f9fa;
}

.nav-button.active {
    background-color: var(--primary-color);
    color: #fff;
}

/* 内容区域样式 */
.cases-section {
    padding: 50px 0;
    background-color: #1E293B;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

/* AI项目落地经验样式 */
.experience-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    color: #b0bbc7;
}

.experience-section {
    margin-bottom: 60px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.experience-section:last-child {
    margin-bottom: 0;
}

.text-content {
    margin-bottom: 30px;
}

.text-content h2 {
    font-size: 2em;
    margin-bottom: 20px;
    color: #fff;
    font-weight: 600;
}

.section-intro {
    font-size: 1.1em;
    line-height: 1.8;
    margin-bottom: 25px;
}

/* 修改图片容器和图片样式 */
.image-wrapper {
    margin-top: 30px;
}

.image-content {
    width: 100%;
    margin: 0 auto;
}

.image-content img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

/* 方法论部分样式 */
.methodology {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin: 30px 0;
}

.method-item {
    background: rgba(255, 255, 255, 0.03);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.method-item h3 {
    color: #fff;
    margin-bottom: 15px;
    font-size: 1.4em;
}

.method-item ul,
.method-item ol {
    padding-left: 20px;
    margin: 0;
}

.method-item li {
    margin-bottom: 10px;
    line-height: 1.6;
}

/* 典型案例样式 */
.case-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.case-card {
    background: rgba(255, 255, 255, 0.05);  /* 改为半透明背景 */
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 40px;
    margin-bottom: 40px;
    color: #b0bbc7;  /* 统一文字颜色 */
}

.client-logo {
    width: 200px;
    height: auto;
    margin: 0 auto 30px;
}

.client-logo img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.case-title {
    text-align: center;
    font-size: 1.8em;
    margin-bottom: 30px;
    color: #fff;  /* 标题使用白色 */
    font-weight: 600;
}

.case-description {
    line-height: 1.8;
    margin-bottom: 30px;
}

.case-description h4 {
    color: #fff;  /* 子标题使用白色 */
    font-size: 1.3em;
    margin: 25px 0 15px;
    font-weight: 500;
}

.case-description p {
    margin-bottom: 15px;
    color: #b0bbc7;
}

.case-image {
    width: 100%;
    margin-top: 30px;
}

.case-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .case-nav {
        flex-direction: column;
        padding: 10px;
    }
    
    .nav-button {
        width: 100%;
    }
    
    .case-cards {
        grid-template-columns: 1fr;
    }
    
    .case-card {
        padding: 25px;
    }

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

    .experience-section {
        padding: 20px;
        margin-bottom: 40px;
    }

    .text-content h2 {
        font-size: 1.6em;
    }

    .image-wrapper {
        padding: 15px;
    }
    
    .method-item {
        padding: 20px;
    }

    .case-title {
        font-size: 1.4em;
    }

    .case-description h4 {
        font-size: 1.2em;
    }

    .client-logo {
        width: 150px;
        margin-bottom: 20px;
    }
}