/* 全局公共样式，所有页面都引入这个文件，统一风格，清除默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}
body {
    background-color: #f5f5f5;
    color: #333;
    font-size: 14px;
}
.container {
    width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
a {
    text-decoration: none;
    color: #333;
}
button {
    cursor: pointer;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    background-color: #409eff;
    color: #fff;
    font-size: 14px;
}
button:hover {
    background-color: #337ecc;
}
input {
    padding: 8px 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    margin: 5px 0;
}
.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
    margin: 10px 0;
}
.title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
    text-align: center;
}
/* 登录/注册表单样式 */
.form-item {
    margin: 15px 0;
}
.form-btn {
    width: 100%;
    margin-top: 20px;
}
/* 排行榜样式 */
.rank-list {
    list-style: none;
    margin-top: 20px;
}
.rank-item {
    padding: 10px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
}