/* 案例页面样式 */
:root {
    --case-primary: #10B981; /* 绿色主题 */
    --case-primary-light: #34D399;
    --case-primary-dark: #059669;
    --case-secondary: #F0FDF4;
    --case-accent: #065F46;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --bg-light: #F9FAFB;
    --border-light: #E5E7EB;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 15px rgba(0, 0, 0, 0.1);
}

/* 英雄区域 */
.cases-hero {
    background: linear-gradient(135deg, var(--case-primary) 0%, var(--case-primary-dark) 100%);
    color: white;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.cases-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') repeat;
    opacity: 0.3;
}

.cases-hero .hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cases-hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
    background: linear-gradient(45deg, #ffffff, #f0fdf4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cases-hero .subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.cases-hero .description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 3rem;
    opacity: 0.8;
}

/* 统计数据 */
.cases-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #fff;
}

/* 案例筛选 */
.case-filters {
    padding: 3rem 0;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-light);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.75rem 1.5rem;
    background: white;
    border: 2px solid var(--border-light);
    border-radius: 50px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.filter-tab:hover {
    border-color: var(--case-primary-light);
    color: var(--case-primary);
    transform: translateY(-2px);
}

.filter-tab.active {
    background: var(--case-primary);
    border-color: var(--case-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* 案例展示 */
.cases-showcase {
    padding: 4rem 0;
    background: white;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.case-item {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
}

.case-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-large);
}

.case-item.hidden {
    display: none;
}

.case-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, var(--case-primary), var(--case-primary-dark));
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.case-item:hover .case-overlay {
    opacity: 0.9;
}

.view-case-btn {
    padding: 0.75rem 1.5rem;
    background: white;
    color: var(--case-primary);
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.case-item:hover .view-case-btn {
    transform: translateY(0);
}

.view-case-btn:hover {
    background: var(--case-secondary);
    transform: scale(1.05);
}

.case-content {
    padding: 2rem;
}

.case-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--case-secondary);
    color: var(--case-primary);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.case-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.case-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* 案例指标 */
.case-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 12px;
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--case-primary);
    margin-bottom: 0.25rem;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 案例标签 */
.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--case-primary);
    color: white;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* 客户证言 */
.testimonials {
    padding: 4rem 0;
    background: var(--bg-light);
}

.testimonials h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
}

.testimonials-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.testimonial-item {
    display: none;
    text-align: center;
    padding: 2rem;
}

.testimonial-item.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.testimonial-content {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-medium);
    position: relative;
}

.quote-icon {
    font-size: 4rem;
    color: var(--case-primary);
    line-height: 1;
    margin-bottom: 1rem;
}

.testimonial-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.author-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.author-info span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 证言控制 */
.testimonial-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.testimonial-prev,
.testimonial-next {
    width: 50px;
    height: 50px;
    border: 2px solid var(--case-primary);
    background: white;
    color: var(--case-primary);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.testimonial-prev:hover,
.testimonial-next:hover {
    background: var(--case-primary);
    color: white;
    transform: scale(1.1);
}

.testimonial-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background: var(--case-primary);
    transform: scale(1.2);
}

.dot:hover {
    background: var(--case-primary-light);
}

/* 合作流程 */
.collaboration-process {
    padding: 4rem 0;
    background: white;
}

.collaboration-process h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.process-step {
    text-align: center;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 20px;
    transition: all 0.3s ease;
    position: relative;
}

.process-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    background: var(--case-secondary);
}

.step-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.process-step h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.process-step p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 开始合作 */
.start-collaboration {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--case-primary) 0%, var(--case-primary-dark) 100%);
    color: white;
    text-align: center;
}

.collaboration-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.collaboration-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.collaboration-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-collaboration-primary,
.btn-collaboration-secondary {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-collaboration-primary {
    background: white;
    color: var(--case-primary);
}

.btn-collaboration-primary:hover {
    background: var(--case-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-collaboration-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-collaboration-secondary:hover {
    background: white;
    color: var(--case-primary);
    transform: translateY(-2px);
}

/* 案例详情模态框 */
.case-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.case-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: white;
    border-radius: 20px;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    margin: 2rem;
    animation: modalSlideIn 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    z-index: 1001;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--case-primary);
}

.modal-body {
    padding: 3rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .cases-hero {
        padding: 80px 0 60px;
    }
    
    .cases-hero h1 {
        font-size: 2.5rem;
    }
    
    .cases-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat-item {
        padding: 1.5rem;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .case-metrics {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .collaboration-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .testimonial-controls {
        gap: 1rem;
    }
    
    .modal-content {
        margin: 1rem;
        max-height: 95vh;
    }
    
    .modal-body {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .filter-tabs {
        gap: 0.5rem;
    }
    
    .filter-tab {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .case-content {
        padding: 1.5rem;
    }
    
    .testimonial-content {
        padding: 2rem;
    }
    
    .collaboration-content h2 {
        font-size: 2rem;
    }
}