/* 下载 PDF 按钮样式（与 RTD 主题配色协调） */
.sdk-download-pdf-wrapper {
    margin-top: 8px;
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: center;       /* 居中对齐容器内按钮 */
}
.sdk-download-pdf-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    line-height: 1;
    color: #2c3e50;               /* 默认适配浅色内容区 */
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.15);
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.sdk-download-pdf-btn:hover,
.sdk-download-pdf-btn:focus {
    background: rgba(0, 0, 0, 0.06);
    transform: translateY(-1px) scale(1.02);
    box-shadow: 0 4px 12px rgba(0,0,0,0.10);
}
.sdk-download-pdf-btn:focus-visible {
    outline: 2px solid rgba(66, 133, 244, 0.35);
    outline-offset: 2px;
}
.sdk-pdf-icon {
    font-size: 14px;
}
.sdk-pdf-text {
    font-size: 12px;
}

/* 侧边栏/顶部深色背景中的适配（RTD主题） */
.wy-side-nav-search .sdk-download-pdf-btn,
.wy-nav-top .sdk-download-pdf-btn {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.25);
}
.wy-side-nav-search .sdk-download-pdf-btn:hover,
.wy-side-nav-search .sdk-download-pdf-btn:focus,
.wy-nav-top .sdk-download-pdf-btn:hover,
.wy-nav-top .sdk-download-pdf-btn:focus {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.35);
}

/* 将侧边栏与顶部导航中的按钮容器居中 */
.wy-side-nav-search .sdk-download-pdf-wrapper,
.wy-nav-top .sdk-download-pdf-wrapper {
    justify-content: center;
}

/* 动画降低动效模式尊重 */
@media (prefers-reduced-motion: reduce) {
    .sdk-download-pdf-btn {
        transition: none;
    }
    .sdk-download-pdf-btn:hover,
    .sdk-download-pdf-btn:focus {
        transform: none;
        box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    }
}