* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial Rounded MT Bold', 'Arial', sans-serif;
}

body {
    background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
    color: #333;
    min-height: 100vh;
    padding: 20px;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Three.js 容器 */
#three-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

/* 加载动画 */
.loading-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #FFCC00;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-section {
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

/* 功能标签 */
.feature-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
}

.feature-tab {
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid #ddd;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: all 0.3s ease;
}

.feature-tab:hover {
    background: #e0e0e0;
    transform: translateY(-2px);
}

.feature-tab.active {
    background: #FFCC00;
    border-color: #FF6B00;
    color: #333;
    box-shadow: 0 3px 10px rgba(255, 107, 0, 0.3);
}

.feature-panel {
    display: none;
}

.feature-panel.active {
    display: block;
}

.coming-soon {
    background: rgba(255, 255, 255, 0.9);
    padding: 60px 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.coming-soon h2 {
    color: #1a2a6c;
    margin-bottom: 15px;
    font-size: 2rem;
}

.coming-soon p {
    color: #666;
    font-size: 1.1rem;
}

/* 页脚 */
footer {
    text-align: center;
    margin-top: 40px;
    color: white;
    opacity: 0.7;
}