:root {
    --primary-color: #4CAF50;
    --secondary-color: #8BC34A;
    --accent-color: #FFC107;
    --text-color: #333333;
    --background-color: #F5F5F5;
    --card-color: #FFFFFF;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
}

.app-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
}

.card {
    background: var(--card-color);
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 16px;
    margin: 8px 0;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    padding: 12px 24px;
    border-radius: 24px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.2);
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.icon-button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.progress-bar {
    height: 8px;
    background: #E0E0E0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 4px;
    transition: width 0.3s ease;
}