* {
    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%);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(120, 219, 255, 0.3) 0%, transparent 50%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    z-index: 1;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 800px;
    width: 90%;
    position: relative;
    z-index: 2;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.header h2 {
    font-size: 1.8rem;
    color: #34495e;
    margin-bottom: 30px;
    font-weight: 300;
}

.time-info {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 40px;
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.time-info p {
    font-size: 1.2rem;
    margin: 5px 0;
    font-weight: 500;
}

.button-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.competition-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    border-radius: 15px;
    padding: 30px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.competition-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.competition-btn:hover::before {
    left: 100%;
}

.competition-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

.competition-btn:active {
    transform: translateY(-2px);
}

.competition-btn:disabled {
    background: linear-gradient(135deg, #bdc3c7, #95a5a6);
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}

.competition-btn:disabled:hover {
    transform: none;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}

.competition-btn:disabled::before {
    display: none;
}

.btn-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.btn-text h3 {
    color: white;
    font-size: 1.3rem;
    margin-bottom: 8px;
    font-weight: bold;
}

.btn-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
    font-weight: 300;
}

.status-info {
    background: rgba(52, 73, 94, 0.1);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.status-info p {
    font-size: 1.1rem;
    color: #2c3e50;
    margin: 5px 0;
    font-weight: 500;
}

#countdown {
    font-size: 1.3rem;
    color: #e74c3c;
    font-weight: bold;
}

.footer {
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 20px;
        margin: 20px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .header h2 {
        font-size: 1.4rem;
    }
    
    .button-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .competition-btn {
        padding: 25px 15px;
    }
    
    .btn-icon {
        font-size: 2.5rem;
    }
    
    .btn-text h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
        margin: 10px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .time-info p {
        font-size: 1rem;
    }
    
    .btn-text h3 {
        font-size: 1rem;
    }
    
    .btn-text p {
        font-size: 0.8rem;
    }
}

/* 动画效果 */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(102, 126, 234, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0);
    }
}

.competition-btn:not(:disabled) {
    animation: pulse 2s infinite;
}

/* 加载动画 */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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