@layer utilities {
    .text-shadow {
        text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    .bg-gradient-blue {
        background: linear-gradient(135deg, #0056b3 0%, #00a0e9 100%);
    }
    .transition-all-300 {
        transition: all 0.3s ease;
    }
}

@media (min-width: 1280px) {
    .container {
        max-width: 1400px !important;
    }
}

@media (min-width: 1536px) {
    .container {
        max-width: 1600px !important;
    }
}

/* 自定义样式 */
.hero-pattern {
    background-color: #003366;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%2300a0e9' fill-opacity='0.1'%3E%3Cpath opacity='.5' d='M96 95h4v1h-4v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9zm-1 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9z'/%3E%3Cpath d='M6 5V0H5v5H0v1h5v94h1V6h94V5H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background-color: #00a0e9;
    transition: width 0.3s ease;
}

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

.card-hover {
    transition: all 0.3s ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, #0056b3 0%, #00a0e9 100%);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,86,179,0.4);
}

.form-input:focus {
    border-color: #00a0e9;
    box-shadow: 0 0 0 3px rgba(0,160,233,0.2);
}

@media (max-width: 768px) {
    .hero-content {
        padding-top: 6rem;
        padding-bottom: 6rem;
    }
    
    h1 {
        font-size: 2rem !important;
        line-height: 1.3 !important;
    }
    
    h2 {
        font-size: 1.75rem !important;
    }
    
    .card-hover {
        margin-bottom: 1rem;
    }
    
    #contact .bg-white {
        padding: 1.5rem !important;
    }
    
    #contact .w-56 {
        width: 12rem !important;
        height: 12rem !important;
    }
    
    footer {
        padding: 2rem 0 !important;
    }
    
    footer .grid > div {
        margin-bottom: 2rem;
    }
    
    #back-to-top {
        bottom: 5rem !important;
        right: 1rem !important;
        width: 2.5rem !important;
        height: 2.5rem !important;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem !important;
    }
    
    h2 {
        font-size: 1.5rem !important;
    }
    
    h3 {
        font-size: 1.125rem !important;
    }
    
    .btn-primary {
        padding: 0.75rem 1.5rem !important;
        font-size: 1rem !important;
    }
    
    .card-hover h3 {
        font-size: 1.25rem !important;
    }
}