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

body {
    background-color: #f4f6f8;
    color: #333;
    line-height: 1.6;
}

.b1, .b2, .b3, .b4, .b5 {
    background-color: #ffffff;
    margin: 20px auto;
    padding: 20px;
    width: 90%;
    max-width: 900px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.b1 {
    text-align: center;
    background-color: #2563eb;
    color: white;
}

.b1 h1 {
    margin-bottom: 10px;
}

h2 {
    margin-bottom: 10px;
    color: #2563eb;
}

hr {
    margin: 10px 0 15px;
    border: none;
    height: 1px;
    background-color: #ddd;
}

p {
    margin-bottom: 8px;
}

.b4 p:first-of-type {
    font-weight: bold;
    color: #111827;
}

.b4 p:last-of-type {
    display: inline-block;
    background-color: #d1fae5;
    color: #065f46;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
}

.b6 {
    text-align: center;
    padding: 15px;
    background-color: #111827;
    color: white;
    margin-top: 30px;
}