/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}


/* 头部样式 */
header {
    text-align: center;
    color: white;
    margin-bottom: 50px;
}

header h1 {
    font-size: 3em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.2em;
    opacity: 0.9;
}

/* 角色选择卡片 */
.role-selection {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.role-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    min-width: 250px;
}

.role-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
}

.role-card h2 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.role-card p {
    color: #666;
    font-size: 1.1em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .role-selection {
        flex-direction: column;
        align-items: center;
    }

    .role-card {
        min-width: 280px;
    }

    header h1 {
        font-size: 2.5em;
    }
}