/* 页面标题样式 */
.page-header {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    color: var(--white);
    text-align: center;
}

.page-title h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeInUp 1s ease 0.2s;
    animation-fill-mode: both;
}

/* 案例筛选样式 */
.case-filter {
    background-color: var(--white);
    padding: 40px 0;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 80px;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

.filter-btn {
    padding: 12px 25px;
    border: 2px solid var(--light-gray);
    background-color: var(--white);
    color: var(--text-dark);
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    transform: translateY(-2px);
}

.filter-btn.active {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

/* 案例网格样式 */
.cases-grid {
    padding: 60px 0;
    background-color: var(--light-gray);
}

.cases-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.case-item {
    background-color: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

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

.case-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

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

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.case-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: var(--transition);
}

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

.view-btn {
    background-color: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    transform: translateY(20px);
}

.case-overlay:hover .view-btn {
    background-color: var(--dark-blue);
    transform: translateY(0);
}

.case-content {
    padding: 30px;
}

.case-category {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: 15px;
}

.case-category i {
    font-size: 0.9rem;
}

.case-content h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.3;
}

.case-client {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 15px;
    font-weight: 500;
}

.case-desc {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.case-tags .tag:hover {
    background-color: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

/* 加载更多按钮 */
.load-more {
    text-align: center;
    padding-top: 20px;
}

.load-more .btn-outline {
    background-color: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    padding: 14px 40px;
}

.load-more .btn-outline:hover {
    background-color: var(--primary-blue);
    color: var(--white);
}

/* 成功数据样式 */
.success-stats {
    padding: 80px 0;
    background-color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.stat-item {
    text-align: center;
    padding: 30px 20px;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--text-dark);
    font-weight: 500;
}

/* CTA区域样式 */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn-primary {
    background-color: var(--white);
    color: var(--primary-blue);
    box-shadow: 0 4px 14px rgba(255, 255, 255, 0.3);
}

.cta-section .btn-primary:hover {
    background-color: var(--accent);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.4);
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: 0;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 800px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s ease;
}

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    color: var(--text-light);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    z-index: 10;
    background-color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.close:hover {
    color: var(--white);
    background-color: var(--primary-blue);
}

#modalBody {
    padding: 40px;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

/* 响应式设计 */
@media (max-width: 768px) {
    .page-title h1 {
        font-size: 2.5rem;
    }

    .case-filter {
        position: static;
    }

    .filter-buttons {
        gap: 10px;
    }

    .filter-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .cases-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .modal-content {
        width: 95%;
        margin: 10% auto;
    }

    #modalBody {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 140px 0 60px;
    }

    .filter-buttons {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 10px;
        -webkit-overflow-scrolling: touch;
    }

    .filter-buttons::-webkit-scrollbar {
        height: 4px;
    }

    .filter-buttons::-webkit-scrollbar-track {
        background: var(--light-gray);
        border-radius: 2px;
    }

    .filter-buttons::-webkit-scrollbar-thumb {
        background: var(--primary-blue);
        border-radius: 2px;
    }

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

    .case-content {
        padding: 20px;
    }

    .case-content h3 {
        font-size: 1.3rem;
    }
}