* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    color: #1a1a1a;
    background: #fff;
}

.container {
    max-width: 1200px;
    margin: auto;
    padding: 0 20px;
}

.top-header {
    border-bottom: 1px solid #e5e5e5;
    background: #fff;
}

.top-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-weight: bold;
    font-size: 20px;
    color: #000;
}

.main-nav a {
    margin-left: 25px;
    text-decoration: none;
    color: #0066cc;
    font-size: 15px;
}

.main-nav a:hover {
    text-decoration: underline;
}
/*home*/
.hero {
    padding: 80px 0;
    background: #f5f7fa;
    text-align: center;
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

.hero p {
    font-size: 18px;
    color: #555;
    margin-bottom: 25px;
}

.btn {
    display: inline-block;
    padding: 12px 25px;
    background: #0066cc;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
}

.btn:hover {
    background: #004f99;
}

/*footer*/

.footer {
    border-top: 1px solid #e5e5e5;
    padding: 20px 0;
    margin-top: 60px;
    text-align: center;
    font-size: 14px;
    color: #666;
}