:root {
    --primary-color: #2196F3;
    --secondary-color: #1976D2;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --dark-gray: #666;
    --white: #fff;
}

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

.section-title {
    margin-bottom: 3rem;
    font-weight: 600;
    color: var(--text-color);
}

/* 导航栏 */
.header {
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar {
    padding: 1rem 0;
}

.navbar-brand img {
    max-height: 40px;
}

.nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* 主页横幅 */
.hero-section {
    padding: 120px 0 80px;
    background-color: var(--light-gray);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.hero-text {
    font-size: 1.2rem;
    color: var(--dark-gray);
    margin-bottom: 2rem;
}

.hero-buttons .btn {
    margin-right: 1rem;
    padding: 0.8rem 2rem;
    border-radius: 5px;
}

/* 产品特点 */
.features-section {
    padding: 80px 0;
    background-color: var(--white);
}

.feature-box {
    text-align: center;
    padding: 2rem;
    margin-bottom: 2rem;
    transition: transform 0.3s ease;
}

.feature-box:hover {
    transform: translateY(-10px);
}

.feature-box i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.feature-box h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* 服务项目 */
.services-section {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.service-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 2rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.service-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.service-card h3 {
    padding: 1.5rem;
    margin: 0;
    font-size: 1.5rem;
}

.service-card p {
    padding: 0 1.5rem 1.5rem;
    color: var(--dark-gray);
}

/* 关于我们 */
.about-section {
    padding: 80px 0;
    background-color: var(--white);
}

.about-text {
    margin-bottom: 2rem;
    color: var(--dark-gray);
}

.about-features {
    list-style: none;
    padding: 0;
}

.about-features li {
    margin-bottom: 1rem;
}

.about-features i {
    color: var(--primary-color);
    margin-right: 1rem;
}

/* 联系我们 */
.contact-section {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.contact-form .form-control {
    margin-bottom: 1.5rem;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.contact-info {
    padding-left: 2rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 1rem;
    margin-top: 0.5rem;
}

/* 页脚 */
.footer {
    background-color: #333;
    color: var(--white);
    padding: 60px 0 20px;
}

.footer h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    margin-bottom: 0.8rem;
    display: inline-block;
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .contact-info {
        padding-left: 0;
        margin-top: 3rem;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .feature-box {
        padding: 1.5rem;
    }
}

/* 动画效果 */
.btn {
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

/* 性能优化 */
img {
    max-width: 100%;
    height: auto;
}

.logo-text {
    display: inline-block;
    vertical-align: middle;
    margin-left: 10px;
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* 打印样式 */
@media print {
    .hero-section,
    .features-section,
    .contact-section {
        page-break-inside: avoid;
    }
}