* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

.container {
    width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 导航 */
.header {
    background: #1a237e;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 999;
}

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

.logo h1 {
    color: white;
    font-size: 26px;
}

.nav a {
    color: white;
    text-decoration: none;
    margin-left: 25px;
    font-size: 16px;
}

.nav a:hover {
    color: #ffd700;
}

/* 轮播 */
.banner {
    height: 500px;
    background: linear-gradient(to right, #3949ab, #5c6bc0);
    display: flex;
    align-items: center;
    text-align: center;
    color: white;
}

.banner h2 {
    font-size: 42px;
    margin-bottom: 20px;
}

.banner p {
    font-size: 18px;
    margin-bottom: 30px;
}

.btn {
    padding: 12px 30px;
    background: #ffd700;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
}

/* 产品 */
.product {
    padding: 80px 0;
    background: #f5f5f5;
}

.title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #333;
}

.product-list {
    display: flex;
    justify-content: space-between;
}

.product-item {
    width: 31%;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.product-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #1a237e;
}

/* 服务 */
.service {
    padding: 80px 0;
}

.service-box {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.service-item {
    padding: 20px 40px;
    background: #1a237e;
    color: white;
    border-radius: 5px;
    font-size: 16px;
}

/* 底部 */
.footer {
    background: #1a237e;
    color: white;
    text-align: center;
    padding: 25px 0;
}

.footer a {
    color: #ffd700;
    text-decoration: none;
}