/* u57fau672cu6837u5f0fu91cdu7f6e */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    text-decoration: none;
    color: #2b6cb0;
    transition: color 0.3s ease;
}

a:hover {
    color: #1a4971;
}

ul {
    list-style: none;
}

.btn {
    display: inline-block;
    background-color: #2b6cb0;
    color: #fff;
    padding: 12px 30px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #1a4971;
    color: #fff;
}

/* u5bfcu822au680fu6837u5f0f */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 15px;
}

.logo h1 {
    font-size: 1.5rem;
    color: #2b6cb0;
    font-weight: 700;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: #4a5568;
    font-weight: 600;
    position: relative;
    padding: 5px 0;
}

nav ul li a:hover {
    color: #2b6cb0;
}

nav ul li a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: #2b6cb0;
    transition: width 0.3s ease;
}

nav ul li a:hover::after {
    width: 100%;
}

/* u4e3bu6a2au5e45u6837u5f0f */
.hero {
    background: linear-gradient(rgba(43, 108, 176, 0.7), rgba(43, 108, 176, 0.7)), url('https://source.unsplash.com/random/1600x900/?business');
    background-size: cover;
    background-position: center;
    color: #fff;
    text-align: center;
    padding: 150px 0 100px;
    margin-top: 80px;
}

.hero h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* u5404u677fu5757u5171u7528u6837u5f0f */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    color: #2d3748;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.underline {
    height: 3px;
    width: 80px;
    background-color: #2b6cb0;
    margin: 0 auto;
}

/* u5173u4e8eu6211u4eecu6837u5f0f */
.about {
    background-color: #fff;
}

.about-content {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.about-text {
    flex: 1;
    min-width: 300px;
    padding-right: 30px;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    color: #4a5568;
}

.about-image {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-icon {
    font-size: 12rem;
    color: #2b6cb0;
    opacity: 0.8;
}

/* u670du52a1u677fu5757u6837u5f0f */
.services {
    background-color: #f8f9fa;
}

.service-items {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.service-item {
    background-color: #fff;
    padding: 40px 30px;
    border-radius: 8px;
    text-align: center;
    flex: 1;
    min-width: 250px;
    max-width: 350px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-item i {
    font-size: 3rem;
    color: #2b6cb0;
    margin-bottom: 20px;
}

.service-item h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2d3748;
}

.service-item p {
    color: #4a5568;
}

/* u4f18u52bfu677fu5757u6837u5f0f */
.advantage {
    background-color: #fff;
}

.advantage-items {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.advantage-item {
    flex: 1;
    min-width: 250px;
    max-width: 350px;
    text-align: center;
    padding: 30px 20px;
    border-radius: 8px;
    background-color: #f8f9fa;
    transition: transform 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
}

.advantage-item i {
    font-size: 2.5rem;
    color: #2b6cb0;
    margin-bottom: 20px;
}

.advantage-item h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #2d3748;
}

.advantage-item p {
    color: #4a5568;
}

/* u9875u811au6837u5f0f */
footer {
    background-color: #2d3748;
    color: #cbd5e0;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.copyright p {
    font-size: 0.9rem;
}

.icp p a {
    color: #cbd5e0;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.icp p a:hover {
    color: #fff;
    text-decoration: underline;
}

/* u54cdu5e94u5f0fu8bbeu8ba1 */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-text {
        padding-right: 0;
        margin-bottom: 40px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .copyright {
        margin-bottom: 20px;
    }
    
    header .container {
        flex-direction: column;
    }
    
    .logo {
        margin-bottom: 20px;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin-left: 0;
        margin-bottom: 10px;
    }
}

@media (max-width: 576px) {
    .service-item,
    .advantage-item {
        min-width: 100%;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero h2 {
        font-size: 1.8rem;
    }
}