/* 回到顶部按钮 */

.progress-wrap {
	position: fixed;
	right: 28px;
	bottom: 28px;
	height: 44px;
	width: 44px;
	cursor: pointer;
	display: block;
	border-radius: 50%;
	background: var(--bg-paper);
	border: 1px solid rgba(0, 0, 0, 0.08);
	box-shadow:
		0 1px 3px rgba(0, 0, 0, 0.06),
		0 4px 8px rgba(0, 0, 0, 0.04);
	z-index: 10000;
	opacity: 0;
	visibility: hidden;
	transform: translateY(12px) scale(0.92);
	transition:
		opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
		visibility 0.35s,
		transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
		box-shadow 0.25s ease;
	animation: none;
}

.progress-wrap.active-progress {
	opacity: 1;
	visibility: visible;
	transform: translateY(0) scale(1);
}

.progress-wrap:hover {
	box-shadow:
		0 2px 6px rgba(0, 0, 0, 0.10),
		0 6px 16px rgba(0, 0, 0, 0.06);
	transform: translateY(-2px) scale(1.06);
}

.progress-wrap:active {
	transform: translateY(0) scale(0.95);
	transition-duration: 0.1s;
}

/* 箭头图标（内联 SVG，直接嵌入 HTML） */
.progress-wrap .btn-icon {
	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
	width: 20px;
	height: 20px;
	color: rgba(0, 0, 0, 0.45);
	cursor: pointer;
	z-index: 1;
	transition: color 0.25s ease;
	pointer-events: none;
}

.progress-wrap:hover .btn-icon {
	color: rgba(0, 0, 0, 0.72);
	opacity: 1;
}

/* 进度环 */
.progress-wrap svg.progress-circle path {
	fill: none;
	stroke: rgba(0, 0, 0, 0.08);
	stroke-width: 2.5;
	box-sizing: border-box;
	transition: stroke 0.3s ease;
}

.progress-wrap:hover svg.progress-circle path {
	stroke: color-mix(in srgb, var(--accent) 40%, transparent);
}