/* 案例筛选 */
.cases-filter {
    position: sticky;
    top: 70px;
    z-index: 100;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

.filter-tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 10px 24px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.filter-tab.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
}

/* 案例列表 */
.cases-list {
    background: var(--dark-bg);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.case-detail-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    display: block;
}

.case-detail-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.case-detail-card.hidden {
    display: none;
}

.case-cover {
    height: 200px;
    background: var(--gradient-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: white;
    position: relative;
    overflow: hidden;
}

.cover-icon {
    transition: transform 0.3s ease;
}

.case-detail-card:hover .cover-icon {
    transform: scale(1.1);
}

.cover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.case-info {
    padding: 30px;
}

.case-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.case-category {
    padding: 6px 16px;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 20px;
    font-size: 14px;
    color: var(--primary-color);
}

.case-date {
    color: var(--text-secondary);
    font-size: 14px;
}

.case-info h3 {
    font-size: 22px;
    margin-bottom: 16px;
    line-height: 1.4;
}

.case-info p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.case-results {
    display: flex;
    gap: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.result-item {
    text-align: center;
    flex: 1;
}

.result-number {
    display: block;
    font-size: 28px;
    font-weight: bold;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.result-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.load-more {
    text-align: center;
    padding: 40px 0;
}

/* 合作伙伴 */
.partners {
    background: var(--darker-bg);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.partner-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.partner-logo:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.partner-logo i {
    font-size: 48px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.partner-logo:hover i {
    color: var(--primary-color);
    transform: scale(1.1);
}

.partner-logo span {
    color: var(--text-secondary);
    font-size: 16px;
}

/* 客户评价 */
.testimonials {
    background: var(--dark-bg);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px 30px;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.testimonial-quote {
    font-size: 48px;
    color: var(--primary-color);
    opacity: 0.3;
    margin-bottom: 20px;
}

.testimonial-text {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
    font-style: italic;
    min-height: 120px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
}

.author-info h4 {
    font-size: 18px;
    margin-bottom: 4px;
}

.author-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-slider {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .filter-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 10px;
    }
    
    .filter-tab {
        white-space: nowrap;
    }
    
    .case-results {
        flex-direction: column;
        gap: 16px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .cases-filter {
        padding: 15px 0;
    }

    .case-info {
        padding: 24px 20px;
    }

    .testimonial-card {
        padding: 30px 20px;
    }

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

/* 案例详情弹层 */
.case-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.case-modal.active {
    display: flex;
}

.case-modal-content {
    background: var(--card-bg);
    border-radius: 16px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
}

.case-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.case-modal-close:hover {
    background: rgba(0, 0, 0, 0.2);
    transform: rotate(90deg);
}

.case-modal-close i {
    font-size: 20px;
    color: var(--text-secondary);
}

.case-modal-header {
    padding: 40px 40px 30px;
    background: var(--gradient-1);
    color: white;
    position: relative;
}

.case-modal-header .case-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.case-modal-header h2 {
    font-size: 32px;
    margin-bottom: 10px;
}

.case-modal-header .modal-meta {
    display: flex;
    gap: 20px;
    align-items: center;
    font-size: 14px;
    opacity: 0.9;
}

.case-modal-body {
    padding: 40px;
}

.case-section {
    margin-bottom: 40px;
}

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

.case-section h3 {
    font-size: 24px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-primary);
}

.case-section h4 {
    font-size: 18px;
    margin-bottom: 15px;
    margin-top: 25px;
    color: var(--text-primary);
}

.case-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 15px;
    font-size: 15px;
}

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

.case-section ul li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
}

.case-section ul li:before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.case-results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 20px;
}

.case-result-item {
    background: var(--dark-bg);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    border-left: 4px solid var(--primary-color);
}

.case-result-item .result-number {
    display: block;
    font-size: 36px;
    font-weight: bold;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.case-result-item .result-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.case-image-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 20px;
}

.case-image {
    height: 200px;
    background: var(--gradient-2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
}

.case-footer {
    padding: 30px 40px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    gap: 15px;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .case-modal-content {
        max-height: 95vh;
    }

    .case-modal-header {
        padding: 30px 20px 20px;
    }

    .case-modal-body {
        padding: 20px;
    }

    .case-modal-header h2 {
        font-size: 24px;
    }

    .case-results-grid {
        grid-template-columns: 1fr;
    }

    .case-image-gallery {
        grid-template-columns: 1fr;
    }

    .case-section h3 {
        font-size: 20px;
    }

    .case-footer {
        padding: 20px;
        flex-direction: column;
    }
}