/* css/case-studies.css */

/* --- 页面横幅样式 --- */
.page-banner.case-studies-banner {
    background-image: linear-gradient(rgba(44, 186, 199, 0.668), rgba(247, 204, 94, 0.452)), url('../images/case-studies-banner.jpg'); /* 背景图颜色调整 */
    background-size: cover;
    background-position: center; /* 背景图位置调整 */
    color: #fff;
    padding: 80px 0;
    text-align: center;
}
.page-banner.case-studies-banner h2 {
    font-size: 2.8em; color: #fff; margin-bottom: 0.4em;
}
.page-banner.case-studies-banner p {
    font-size: 1.2em; max-width: 800px; margin: 0 auto; color: rgba(255,255,255,0.9); line-height: 1.7;
}

/* --- 引言区域 --- */
.cases-intro .lead {
    font-size: 1.15em; color: #444; max-width: 900px; margin: 20px auto 0 auto; line-height: 1.8;
}

/* --- 案例筛选器 --- */
.case-filters {
    /* background-color: #f8f9fa; 已在HTML中实现 */
    border-bottom: 1px solid #e0e0e0;
}
.filters-container {
    display: flex;
    flex-wrap: wrap; /* 允许换行 */
    justify-content: center; /* 居中筛选器 */
    align-items: center;
    gap: 20px; /* 筛选组之间的间隔 */
}
.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}
.filter-group label {
    font-weight: 500;
    color: #333;
}
.filter-group select {
    padding: 8px 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #fff;
    font-size: 0.95em;
    min-width: 180px; /* 选择框最小宽度 */
}
#apply-filters-btn.small { /* 调整筛选按钮大小 */
    padding: 9px 20px;
    font-size: 0.9em;
    }

/* --- 案例网格与卡片 --- */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); /* 响应式卡片列 */
    gap: 30px;
    margin-top: 40px;
}

.case-card {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    overflow: hidden; /* 确保图片圆角生效 */
    display: flex; /* 卡片内部垂直排列 */
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

.case-card-image {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 宽高比 (9 / 16 * 100) */
    overflow: hidden;
}
.case-card-image img {
    position: absolute;
    overflow: hidden;
}
.case-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover; /* 图片填满容器并裁剪 */
    transition: transform 0.4s ease;
}
.case-card:hover .case-card-image img {
    transform: scale(1.05); /* 图片轻微放大效果 */
}

.case-card-tag {
    position: absolute;
    top: 15px;
    left: 15px;
    background-color: #FF6F00; /* 强调色 */
    color: #fff;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.8em;
    font-weight: bold;
    z-index: 1;
}

.case-card-content {
    padding: 20px 25px;
    flex-grow: 1; /* 让内容区占据剩余空间 */
    display: flex;
    flex-direction: column;
}

.case-card-title {
    font-size: 1.3em;
    color: #1A237E;
    margin-bottom: 15px;
    line-height: 1.4;
    /* 限制标题行数 (可选) */
    /* display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden; */
}

.case-card-client,
.case-card-challenge,
.case-card-solution,
.case-card-result {
    font-size: 0.9em;
    color: #555;
    margin-bottom: 10px;
    line-height: 1.6;
}
.case-card-result strong,
.case-card-client strong,
.case-card-challenge strong,
.case-card-solution strong {
    color: #333;
}
.icon-result { /* 成果部分的图标样式 */
    color: #00796B; /* 用一个绿色代表成果 */
    margin-right: 5px;
}

.case-card-link {
    display: inline-block;
    margin-top: auto; /* 将链接推到底部 */
    padding-top: 10px; /* 与上方内容留出间距 */
    color: #FF6F00;
    font-weight: bold;
    text-align: right;
}
.case-card-link:hover {
    color: #E65100;
    text-decoration: underline;
}

/* 无案例提示 */
.no-cases-found {
    color: #777;
}


/* --- 客户Logo墙 --- */
#case-customer-logos .logos-slider { /* 与首页样式一致 */
    /* 如果需要微调，可以在这里覆盖 */
}


/* --- 案例详情模态框 (Modal) --- */
.modal {
    position: fixed;
    z-index: 1001; /* 比头部更高 */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.6); /* 半透明黑色背景 */
    display: flex; /* 用于垂直居中 */
    align-items: center;
    justify-content: center;
}
.modal-content {
    background-color: #fff;
    margin: auto;
    padding: 30px;
    border-radius: 8px;
    width: 90%;
    max-width: 700px; /* 模态框最大宽度 */
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    animation: fadeInModal 0.3s ease-out;
}
@keyframes fadeInModal {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}
.close-modal-btn {
    color: #aaa;
    float: right; /*兼容性更好的方式*/
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    line-height: 1;
}
.close-modal-btn:hover,
.close-modal-btn:focus {
    color: #333;
    text-decoration: none;
    cursor: pointer;
}
#modal-case-title {
    margin-top: 0;
    margin-bottom: 20px;
    color: #1A237E;
}
#modal-case-body p {
    font-size: 1em;
    line-height: 1.7;
    color: #444;
}

/* 案例详情图片 */
.case-detail-image {
    margin-top: 30px;
}

.case-detail-image img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 多张案例详情图片 */
.case-detail-images {
    margin-top: 30px;
}

.detail-images-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.detail-image-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.detail-image-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.detail-image-item:hover img {
    transform: scale(1.05);
}

/* --- 响应式调整 (case-studies.css) --- */
@media (max-width: 768px) {
    .page-banner.case-studies-banner h2 { font-size: 2.2em; }
    .page-banner.case-studies-banner p { font-size: 1em; }

    .filters-container {
        flex-direction: column; /* 筛选器垂直排列 */
        align-items: stretch; /* 拉伸以填满宽度 */
    }
    .filter-group select {
        width: 100%; /* 选择框占满一行 */
    }
    #apply-filters-btn {
        width: 100%;
    }

    .cases-grid {
        grid-template-columns: 1fr; /* 手机端单列显示案例 */
    }
    .case-card-title {
        font-size: 1.2em;
    }
}