body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: white;
    color: #111;
    line-height: 1.7;
}

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

.header {
    border-bottom: 1px solid #eee;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 1px;
}

.version {
    font-size: 14px;
    color: #666;
    margin-right: 20px;
}

.download {
    border: 1px solid #111;
    padding: 8px 16px;
    text-decoration: none;
    color: #111;
    font-size: 14px;
}

.layout {
    display: flex;
    max-width: 1400px;
    margin: auto;
}

.sidebar {
    width: 260px;
    padding: 40px;
    border-right: 1px solid #eee;
    position: sticky;
    top: 0;
    height: 100vh;
}

.sidebar nav a {
    display: block;
    margin-bottom: 10px;
    text-decoration: none;
    color: #333;
    font-size: 14px;
}

.content {
    flex: 1;
    padding: 60px;
    max-width: 800px;
}

h1 {
    font-size: 38px;
    margin-bottom: 20px;
}

h2 {
    margin-top: 40px;
    font-size: 26px;
}

.lead {
    font-size: 18px;
    color: #555;
}

ul {
    padding-left: 20px;
}

.footer {
    margin-top: 80px;
    border-top: 1px solid #eee;
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.links a {
    margin-left: 15px;
    text-decoration: none;
    color: #333;
}