.container {
    width: 480px; /* 固定宽度 */
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.header {
    margin-bottom: 60px;
    text-align: center;
}

.header h1 {
    color: white;
    font-size: 32px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.role-selector {
    width: 400px; /* 固定宽度 */
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.role-btn {
    width: 400px; /* 固定宽度 */
    height: 60px;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: bold;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.role-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.role-btn:active {
    transform: translateY(0);
}

.admin-btn {
    background-color: #a0472a;
}

.district-btn {
    background-color: #a0472a;
}

.leader-btn {
    background-color: #c70c5b;
}

.user-btn {
    background-color: #1296db;
}