body {
    margin: 0;
    padding: 0;
    height: 100vh;
    font-family: Arial, sans-serif;
    display: flex;
    align-items: center;
    flex-direction: column;
}
img {
    vertical-align: middle;
}
a:hover {
    filter: brightness(85%);
}

.top-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}
.github {
    background-color: #F0F0F0;
    text-align: center;
    font-size: 1em;
    width: 190px;
    text-decoration: none;
    padding: 0;
    transition: background 0.3s ease;
    color: black;
}
.github img {
    width: 28px;
    height: 28px;
}

.btn {
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    width: 190px;
    padding: 12px 0;
    border-radius: 6px;
    font-size: 1em;
    font-weight: bold;
    margin: 10px 0;
    transition: background 0.3s ease;
    color: white;
}
.btn:hover {
    transform: scale(1.05);
}
.btn:active {
    transform: scale(0.98);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.btn-map {
    background-color: #01B0F1;
}
.btn-rainbow {
    background: linear-gradient(90deg, #ff6ec4, #7873f5, #2afadf, #00ffd5);
    background-size: 150% 100%;
}
.btn-treasure {
    background-color: #cc9a00;
}
.btn-glot {
    background-color: #50b5ff;
}

.coming {
    text-align: center;
    color: #8898aa;
    font-style: italic;
}

/* 底部额外信息 */
#site-footer {
    margin-top: auto;
    font-size: 13px;
    text-align: center;
    color: #555;
    background: inherit;
    padding: 10px 0 8px;
}
#site-footer a {
    color: inherit;
    text-decoration: none;
}
#site-footer img {
    width: 15px;
    height: 15px;
    transform: translateY(-1px);
}

/* 响应式设计*/
@media (max-width: 768px) {
    .btn {
        font-size: 1.1em;
        padding: 14px 28px;
    }

    .github {
        font-size: 1.05em;
    }
}