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

body {
    background: linear-gradient(135deg, #FAF0E6 0%, #F5E6D3 100%);
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.start-container {
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    padding: 50px 60px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    border-radius: 20px;
    max-width: 800px;
    width: 100%;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.title-section {
    margin-bottom: 40px;
}

.game-title {
    font-size: 3.5rem;
    color: #5a3e2e;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    animation: glow 2s ease-in-out infinite alternate;
    margin-bottom: 10px;
}

@keyframes glow {
    from {
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    }
    to {
        text-shadow: 2px 2px 10px rgba(255, 165, 0, 0.3);
    }
}

.subtitle {
    font-size: 1.4rem;
    color: #8a6e5e;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 50px;
}

.menu-btn {
    border: none;
    font-size: 1.2rem;
    padding: 15px 40px;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s ease;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-icon {
    font-size: 1.3rem;
}

.btn-primary {
    background: linear-gradient(135deg, #c0a080 0%, #a08060 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(192, 160, 128, 0.4);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: linear-gradient(135deg, #8a6e5e 0%, #6a4e3e 100%);
    color: white;
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(138, 110, 94, 0.4);
}

.btn-secondary:active {
    transform: translateY(-1px);
}

.feature-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.feature-card {
    background: linear-gradient(135deg, #FFF8E7 0%, #FFF5DC 100%);
    padding: 25px 20px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.feature-card h3 {
    color: #5a3e2e;
    margin-bottom: 8px;
    font-size: 1.2rem;
}

.feature-card p {
    color: #7a5e4e;
    font-size: 0.95rem;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: #FFFFF0;
    padding: 0;
    width: 90%;
    max-width: 600px;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideDown 0.3s ease;
    max-height: 85vh;
    overflow-y: auto;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    background: linear-gradient(135deg, #c0a080 0%, #a08060 100%);
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 15px 15px 0 0;
}

.modal-header h2 {
    color: white;
    font-size: 1.5rem;
}

.close {
    color: white;
    font-size: 28px;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.close:hover {
    transform: scale(1.2);
}

.modal-body {
    padding: 30px 25px;
}

.rule-section,
.about-section {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e0d0c0;
}

.rule-section:last-child,
.about-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.rule-section h3,
.about-section h3 {
    color: #5a3e2e;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.rule-section p,
.about-section p {
    color: #7a5e4e;
    line-height: 1.7;
    font-size: 1rem;
}

footer {
    color: #8a6e5e;
    font-size: 1rem;
    padding-top: 20px;
    border-top: 1px solid #e0d0c0;
}

.footer-small {
    font-size: 0.9rem;
    margin-top: 5px;
    color: #9a7e6e;
}

@media (max-width: 600px) {
    .start-container {
        padding: 30px 20px;
    }
    
    .game-title {
        font-size: 2.5rem;
    }
    
    .feature-section {
        grid-template-columns: 1fr;
    }
}