/* 项目案例页面样式 */
* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
/* ==================== 页面横幅 ==================== */
.page-banner {
    position: relative;
    height: 50vh;
    min-height: 400px;
    overflow: hidden;
}

.page-banner-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transform: scale(1.1);
    transition: transform 0.1s ease-out;
}

.page-banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 87, 153, 0.85) 0%, rgba(0, 0, 0, 0.7) 100%);
}

.page-banner-content {
    position: relative;
    z-index: 10;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.page-banner-title {
    font-size: 56px;
    font-weight: 700;
    letter-spacing: 8px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.3s;
}

.page-banner-subtitle {
    font-size: 18px;
    letter-spacing: 4px;
    opacity: 0.9;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.5s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 筛选区域 ==================== */
.cases-filter-section {
    background: #fff;
    padding: 80px 50px 40px;
}

.cases-container {
    max-width: 1400px;
    margin: 0 auto;
}

.filter-header {
    text-align: center;
    margin-bottom: 40px;
}

.filter-title {
    font-size: 36px;
    font-weight: 700;
    color: #1a1a1a;
    letter-spacing: 4px;
    margin-bottom: 15px;
}

.filter-desc {
    font-size: 16px;
    color: #666;
    letter-spacing: 2px;
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 12px 30px;
    font-size: 15px;
    font-weight: 500;
    color: #666;
    background-color: transparent;
    border: 1px solid #ddd;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-tab.active {
    background: linear-gradient(135deg, #1e5799, #2980b9);
    color: #fff;
    border-color: transparent;
}

.filter-tab:hover:not(.active) {
    border-color: #1e5799;
    color: #1e5799;
}

/* ==================== 案例网格 ==================== */
.cases-grid-section {
    background: #f8f9fa;
    padding: 40px 50px 80px;
}

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

.case-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    cursor: pointer;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(30, 87, 153, 0.15);
}

.case-card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.case-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.case-card:hover .case-card-image img {
    transform: scale(1.1);
}

.case-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.5) 100%);
    display: flex;
    align-items: flex-end;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.case-card:hover .case-card-overlay {
    opacity: 1;
}

.case-card-category {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, #1e5799, #2980b9);
    color: #fff;
    font-size: 12px;
    border-radius: 20px;
}

.case-card-content {
    padding: 25px;
}

.case-card-title {
    font-size: 18px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 12px;
    line-height: 1.4;
}

.case-card-summary {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.case-card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #1e5799;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.case-card-link svg {
    width: 18px;
    height: 18px;
    fill: #1e5799;
    transition: transform 0.3s ease;
}

.case-card:hover .case-card-link svg {
    transform: translateX(5px);
}

/* ==================== 模态框 ==================== */
.case-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.case-modal.active {
    opacity: 1;
    visibility: visible;
}

.case-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
}

.case-modal-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
    max-height: 90vh;
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    transform: translateY(30px);
    transition: transform 0.4s ease;
}

.case-modal.active .case-modal-content {
    transform: translateY(0);
}

.case-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
}

.case-modal-close:hover {
    background: rgba(0, 0, 0, 0.2);
}

.case-modal-close svg {
    width: 24px;
    height: 24px;
    fill: #333;
}

.case-modal-body {
    display: flex;
    gap: 40px;
    max-height: 90vh;
    overflow-y: auto;
}

.case-modal-image {
    flex: 1;
    min-width: 400px;
}

.case-modal-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-modal-info {
    flex: 1;
    padding: 40px 40px 40px 0;
}

.case-modal-category {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, #1e5799, #2980b9);
    color: #fff;
    font-size: 14px;
    border-radius: 20px;
    margin-bottom: 20px;
}

.case-modal-title {
    font-size: 28px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.case-modal-section {
    margin-bottom: 25px;
}

.case-modal-section h4 {
    font-size: 16px;
    font-weight: 600;
    color: #1e5799;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.case-modal-section p {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

.case-modal-section ul {
    list-style: none;
    padding: 0;
}

.case-modal-section ul li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    font-size: 15px;
    color: #333;
    border-bottom: 1px solid #eee;
}

.case-modal-section ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: #1e5799;
    border-radius: 50%;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .cases-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-modal-body {
        flex-direction: column;
    }
    
    .case-modal-image {
        min-width: 100%;
        height: 300px;
    }
    
    .case-modal-info {
        padding: 30px;
    }
}

@media (max-width: 768px) {
    .cases-filter-section,
    .cases-grid-section {
        padding: 40px 20px;
    }
    
    .page-banner-title {
        font-size: 36px;
    }
    
    .filter-title {
        font-size: 28px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-tabs {
        gap: 10px;
    }
    
    .filter-tab {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .case-modal-content {
        width: 95%;
    }
}
</task_progress>
</write_to_file>