/* 全局样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: #333;
    line-height: 1.6;
}

/* 导航栏样式 */
header {
    transition: all 0.3s ease;
}

header.scrolled {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* 按钮样式 */
button {
    transition: all 0.3s ease;
}

/* 卡片样式 */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* 图片懒加载样式 */
.lazy-image {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy-image.loaded {
    opacity: 1;
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 产品分类按钮样式 */
.product-category-btn,
.case-category-btn,
.news-category-btn,
.job-category-btn {
    transition: all 0.3s ease;
}

.product-category-btn:hover,
.case-category-btn:hover,
.news-category-btn:hover,
.job-category-btn:hover {
    transform: translateY(-2px);
}

/* 模态框样式 */
.modal {
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: scale(1);
}

/* FAQ 样式 */
.faq-btn {
    transition: all 0.3s ease;
}

.faq-btn:hover {
    background-color: #f9fafb;
}

.faq-btn.active i {
    transform: rotate(180deg);
}

.faq-content {
    transition: all 0.3s ease;
    max-height: 0;
    overflow: hidden;
}

.faq-content.show {
    max-height: 500px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}

/* 返回顶部按钮样式 */
#back-to-top {
    transition: all 0.3s ease;
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* 表单样式 */
form input,
form textarea,
form select {
    transition: all 0.3s ease;
}

form input:focus,
form textarea:focus,
form select:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* 时间线样式 */
.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: #e5e7eb;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: #3b82f6;
    transform: translateX(-50%);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(59, 130, 246, 0.3);
    border-radius: 50%;
    border-top-color: #3b82f6;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}