/* 折叠面板容器 */
.collapsible-container {
    padding: 50px 0;
    max-width: 1300px;
    margin: 0 auto;
}

/* 主图片区域 */
.main-image-wrapper {
    position: relative;
    width: 100%;
    height: 400px;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.main-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    padding: 40px 30px 20px;
    color: white;
}

.overlay-title {
    font-size: 2.2rem;
    margin: 0;
}

/* 折叠面板区域 */
.collapsible-panels {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 面板样式 */
.panel {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transform: translateY(20px);
}

/* 面板头部 */
.panel-header {
    background-color: #146ab9;
    color: white;
    padding: 15px 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.panel-header:hover {
    background-color: #2281b8;
}

.panel-title {
    margin: 0;
    font-size: 1.3rem;
}

.panel-icon {
    font-size: 1.5rem;
    font-weight: bold;
    transition: transform 0.3s ease;
}

/* 面板内容 */
.panel-content {
    padding: 0 25px;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease;
}

.panel-content p {
    color: #333;
    line-height: 1.8;
    margin: 0;
    padding: 20px 0;
    border-bottom: 1px solid #eee;
}

/* 激活状态 */
/* .panel.active .panel-header {
    background-color: #3916b6;
}

.panel.active .panel-icon {
    transform: rotate(45deg);
} */

/* 动画定义 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fadeIn {
    animation: fadeIn 1s forwards;
}

.slideInUp {
    animation: slideInUp 0.6s forwards;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .collapsible-container {
        padding: 30px 20px;
    }

    .main-image-wrapper {
        height: 300px;
    }

    .overlay-title {
        font-size: 1.8rem;
    }
}