:root {
    --primary-color: #ff6b6b;
    --secondary-color: #4ecdc4;
    --text-color: #2d3436;
    --background-color: #f9f9f9;
    --border-radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    color: #666;
    font-size: 1.1rem;
}

.screen {
    display: none;
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.screen.active {
    display: block;
}

.welcome-content {
    text-align: center;
}

.welcome-image {
    font-size: 80px;
    color: var(--primary-color);
    margin-bottom: 20px;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

.btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    background-color: #ff5252;
}

.progress-bar {
    height: 6px;
    background-color: #eee;
    border-radius: 3px;
    margin-bottom: 30px;
}

.progress {
    height: 100%;
    background-color: var(--secondary-color);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 30px;
}

.option-btn {
    background-color: white;
    border: 2px solid #eee;
    padding: 15px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.option-btn:hover {
    border-color: var(--primary-color);
    background-color: #fff5f5;
}

.score-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.score-bar {
    flex: 1;
    height: 8px;
    background-color: #eee;
    border-radius: 4px;
    overflow: hidden;
}

.score-fill {
    height: 100%;
    background-color: var(--secondary-color);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.score-value {
    min-width: 30px;
    text-align: right;
    font-weight: bold;
    color: var(--primary-color);
}

.result-type {
    font-size: 2.5rem;
    text-align: center;
    margin: 30px 0;
    color: var(--primary-color);
}

.result-description {
    background-color: #f8f9fa;
    padding: 25px;
    border-radius: var(--border-radius);
    margin: 20px 0;
    line-height: 1.8;
    font-size: 1.1rem;
}

.result-details {
    background-color: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    margin: 30px 0;
}

.language-scores {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
}

footer {
    margin-top: 40px;
    text-align: center;
    padding: 20px;
    border-top: 1px solid #eee;
}

.donate-section {
    margin-bottom: 20px;
}

.donate-section p {
    color: #666;
    margin-bottom: 10px;
}

.donate-btn {
    display: inline-block;
    background-color: #ff6b6b;
    color: white;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    transition: transform 0.2s, background-color 0.2s;
}

.donate-btn:hover {
    transform: translateY(-2px);
    background-color: #ff5252;
}

.donate-btn i {
    margin-right: 8px;
}

.footer-links {
    color: #666;
}

.footer-links a {
    color: #666;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.separator {
    margin: 0 10px;
    color: #ddd;
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    h1 {
        font-size: 2rem;
    }

    .screen {
        padding: 20px;
    }

    .option-btn {
        padding: 12px;
    }
}