/* 自定义样式 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    scroll-behavior: smooth;
}

/* 动画效果 */
@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fade-in 1s ease-out;
}

.animate-fade-in-delay {
    animation: fade-in 1s ease-out 0.3s both;
}

/* 导航栏悬停效果 */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background-color: #1e40af;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* 按钮悬停效果 */
.btn-hover {
    transition: all 0.3s ease;
}

.btn-hover:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(30, 64, 175, 0.3);
}

/* 产品卡片悬停效果 */
.product-card {
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
}

/* 背景动画容器 */
#background-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* 响应式设计优化 */
@media (max-width: 768px) {
    .hero-content {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }
    
    .section-padding {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* 表单验证样式 */
.form-input {
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-input.error {
    border-color: #ef4444;
}

.form-input.success {
    border-color: #10b981;
}

/* 通知消息样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 16px 24px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background-color: #10b981;
}

.notification.error {
    background-color: #ef4444;
}

.notification.info {
    background-color: #3b82f6;
}