/* 滚动进度条 */
.scroll-progress {
    position: fixed;
    top: 80px;
    right: 20px;
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: #fff;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    z-index: 1000;
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
}
.scroll-progress.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}
.back-to-top i {
    font-size: 24px;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5);
}