/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "思源黑体", "Microsoft Yahei", sans-serif;
}

/* 导航栏 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
header .logo img {
    height: 50px;
}
header nav a {
    margin-left: 30px;
    text-decoration: none;
    color: #333;
    font-size: 16px;
}
header nav a:hover {
    color: #0066CC; /* 企业主色 */
}

/* 横幅区 */
.hero {
    background: url(/images/bg.jpg) no-repeat center center;
    background-size: cover;
    height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-align: center;
}
.hero h1 {
    font-size: 48px;
    margin-bottom: 30px;
}
.hero .btn {
    padding: 15px 30px;
    background-color: #0066CC;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-size: 18px;
}

/* 优势区 */
.advantages {
    padding: 80px 5%;
    text-align: center;
}
.advantages h2 {
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}
.advantage-list {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.advantage-item {
    width: 30%;
    margin-bottom: 30px;
}
.advantage-item i {
    font-size: 48px;
    color: #0066CC;
    margin-bottom: 20px;
}
.advantage-item h3 {
    font-size: 24px;
    margin-bottom: 15px;
}
.advantage-item p {
    color: #666;
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    padding: 80px 5%;
}
.contact h2 {
    font-size: 36px;
    margin-bottom: 50px;
    text-align: center;
}
.contact-container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.contact-details, .contact-form {
    width: 48%;
}
.contact-details h3, .contact-form h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}
.contact-details p {
    margin-bottom: 15px;
    font-size: 16px;
    color: #666;
}
.contact-details i {
    color: #0066CC;
    margin-right: 10px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #333;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}
.contact-form .btn {
    padding: 10px 20px;
    background-color: #0066CC;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
}

/* 底部 */
footer {
    background-color: #333;
    color: #fff;
    padding: 50px 5%;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
footer .contact-info p {
    margin-bottom: 10px;
}
footer .copyright {
    align-self: flex-end;
}

/* 响应式（手机适配，企业站必备） */
@media (max-width: 768px) {
    header {
        flex-direction: column;
    }
    header nav {
        margin-top: 20px;
    }
    header nav a {
        margin-left: 15px;
    }
    .hero h1 {
        font-size: 32px;
    }
    .advantage-item, .contact-details, .contact-form {
        width: 100%;
    }
}