/* 自定义网站颜色和布局 */
body {
    font-family: 'Roboto', sans-serif;
    color: #333;
}

.navbar {
    background-color: #004a7c; /* 深蓝色导航栏 */
}

.navbar-brand, .nav-link {
    color: #fff !important;
}

.banner {
    background: linear-gradient(135deg, 
        #004a7c 0%,      /* 深蓝色起始 */
        #006bb3 50%,     /* 中间过渡色 */
        #0088cc 100%     /* 浅蓝色结束 */
    );
    position: relative;
    overflow: hidden;
    color: #fff;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    padding: 100px 0;
    text-align: center;
}

/* 添加科技感背景元素 */
.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(255,255,255,0.05) 25%, 
        transparent 25%, 
        transparent 50%, 
        rgba(255,255,255,0.05) 50%, 
        rgba(255,255,255,0.05) 75%, 
        transparent 75%
    );
    background-size: 100px 100px;
    animation: banner-animation 15s linear infinite;
    opacity: 0.4;
}

@keyframes banner-animation {
    from {
        background-position: 0 0;
    }
    to {
        background-position: 100px 100px;
    }
}

.banner h1 {
    font-size: 3rem;
    font-weight: bold;
}

.section {
    padding: 80px 0 40px;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    color: #004a7c;
}

.intro-section,
.services-section,
.technology-section,
.contact-section {
    background: linear-gradient(to bottom, #f8f9fa, #e9ecef);
}

.card {
    border: none;
    margin-bottom: 30px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.card-title {
    color: #006bb3;
}

footer {
    background-color: #004a7c;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

footer a {
    color: #fff;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form input, .contact-form textarea {
    border-radius: 0;
    border: 1px solid #ced4da;
}

.contact-form button {
    background-color: #006bb3;
    color: #fff;
}