#floating-buttons {
            position: fixed;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        
        /* 按钮显示状态 */
        #floating-buttons.visible {
            opacity: 1;
            visibility: visible;
        }
        
        /* 单个按钮样式 */
        .floating-btn {
            width: 50px;
            height: 50px;
            margin-bottom: 10px;
            border-radius: 50%;
            background: rgba(0,0,205,1);
            color: white;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
            position: relative;
            border: none;
            font-weight: bold;
        }
        
        /* 按钮悬停效果 */
        .floating-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
            background: #f5c51d !important;
            color: #333 !important;
        }
        
        /* 按钮高亮效果 - 使用更具体的类名避免冲突 */
#floating-buttons .floating-btn.nav-highlight,
button#floating-buttons .floating-btn.nav-highlight {
    background: #f5c51d !important;
    color: #333 !important;
    transform: scale(1.15) !important;
    box-shadow: 0 0 0 3px rgba(245, 197, 29, 0.5), 0 6px 20px rgba(0, 0, 0, 0.3) !important;
}
        
        /* 按钮提示文本 */
        .tooltip {
            position: absolute;
            left: 60px;
            background-color: rgba(0, 0, 0, 0.8);
            color: white;
            padding: 8px 12px;
            border-radius: 4px;
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            font-size: 14px;
            pointer-events: none;
        }
        
        .tooltip::before {
            content: '';
            position: absolute;
            left: -6px;
            top: 50%;
            transform: translateY(-50%);
            border-width: 6px 6px 6px 0;
            border-style: solid;
            border-color: transparent rgba(0, 0, 0, 0.8) transparent transparent;
        }
        
        .floating-btn:hover .tooltip {
            opacity: 1;
            visibility: visible;
        }
        
        /* 滚动进度指示器 */
        .scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 5px;
            background: rgba(0,0,205,1);
            z-index: 1001;
            transition: width 0.1s ease;
        }