.logo{
    float: left;
    font-size: 22px;
    font-weight: bold;
    font-style: normal;
    height: 34px;
    line-height: 34px;
    background-color: black;
    padding: 0 8px;
    border-radius: 6px;
    margin: 0;
}
.logo a{
    color:white;
}

header > nav {
    width:100%;
    max-width: 800px;
    margin: 0 auto;
}

body, h1, h2, p, a, button {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif; /* 使用常见的无衬线字体 */
    text-decoration: none;
}


body {
    
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;
    margin: 0;
    background-color: #e0f7fa;
}

header, footer {
    background-color: #fff;
    color: #000;
    text-align: center;
    padding: 10px 0;
    width: 100%;
}

.race-nav {
    float: left;
    width: 100%;
    margin-top: 10px;
}

.race-nav a {
    display: block;
    float: left;
    height: 34px;
    line-height: 34px;
    margin-right: 10px;
    margin-top: 10px;
    padding: 0 10px;
    background-color: #e0e0e0;
    border-radius: 5px;
    transition: background-color 0.3s;
    color: #333;
}

.race-nav a.curr{
    color:#0288d1;
    font-weight: bold;
}

.race-nav a:hover {
    text-decoration: underline;
    background-color: #d0d0d0;
}

.container {
    display: flex;
    flex-direction: column;
    /* align-items: center; */
    background-color: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    margin: 20px auto; /* 居中主内容区域 */
}

.options {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    width: 100%;
    max-width: 600px;
}

.option-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin: 10px;
    flex: 1;
}

.option-group > label {
    margin-bottom: 10px;
    font-weight: bold;
    font-size: 1.2em;
}

.option {
    display: flex;
    align-items: center;
    margin-bottom: 5px;
}

.option input {
    margin-right: 5px;
}

.option label {
    font-weight: normal;
    font-size: 1em;
}

button {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #0288d1;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #0277bd;
}

#result {
    margin-top: 20px;
    font-size: 1.2em;
    font-weight: bold;
}

.description {
    text-align: left;
    margin-top: 20px;
}

.description h2 {
    font-size: 1.5em;
    margin-bottom: 10px;
}

.description p, .description ul, .description ol {
    font-size: 1em;
    margin-bottom: 10px;
}

.description ul {
    list-style-type: disc;
    padding-left: 20px;
}

.description ol {
    list-style-type: decimal;
    padding-left: 20px;
}