/* 自定义样式增强 */
:root {
    --primary-blue: #2563eb;
    --secondary-purple: #7c3aed;
    --accent-yellow: #fbbf24;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 导航栏动画 */
.nav-link {
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-yellow);
    transition: width 0.3s ease;
}

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

/* 卡片悬停效果 */
.card-hover {
    transition: all 0.3s ease;
    transform: translateY(0);
}

.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 按钮动画 */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
}

/* 响应式图片 */
.responsive-img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .mobile-padding {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* 表单样式优化 */
.form-input {
    transition: all 0.3s ease;
}

.form-input:focus {
    box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.3);
}

/* 图标动画 */
.icon-hover {
    transition: transform 0.3s ease;
}

.icon-hover:hover {
    transform: scale(1.1);
}

/* 渐变背景 */
.gradient-bg {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-purple);
}