* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}
body {
    line-height: 1.6;
    color: #333;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}
header {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
    margin-bottom:40px;
}
header img {
    height: 40px;
}
nav a {
    margin-left: 20px;
    text-decoration: none;
    color: #222;
}
nav a:hover {
    color: #005b96;
}
.hero {
    margin: 40px 0;
}.banner-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.advantage ul {
    list-style: none;
    padding-left: 0;
}
.advantage li {
    padding: 6px 0 6px 22px;
    position: relative;
}
.advantage li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: #005b96;
}
h1, h2, h3 {
    margin-bottom: 16px;
}
p {
    margin-bottom: 14px;
}
.btn {
    display: inline-block;
    padding: 10px 24px;
    background: #005b96;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    margin-top: 10px;
}
.btn:hover {
    background: #003f66;
}
.product-item {
    padding: 20px;
    border: 1px solid #eee;
    margin-bottom: 20px;
    border-radius: 6px;
}
.product-item:hover {
    border-color: #005b96;
}
.tip {
    color: #666;
    font-style: italic;
}
form div {
    margin-bottom: 16px;
}
input, textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
input:focus, textarea:focus {
    border-color: #005b96;
    outline: none;
}
.contact-info {
    margin-top: 40px;
    padding: 20px;
    background: #f5f5f5;
    border-radius: 6px;
}
footer {
    margin-top: 80px;
    padding: 20px;
    border-top: 1px solid #eee;
    text-align: center;
    font-size: 14px;
    color: #888;
}