:root {
	--bg-start: #f7f4ea;
	--bg-end: #d5e8f7;
	--text-color: #1f1f1f;
	--dot-inactive: rgba(31, 31, 31, 0.25);
	--dot-active: #1f1f1f;
	--footer-height: 10vh;
}

* {
	box-sizing: border-box;
}

html,
body {
	margin: 0;
	width: 100%;
	height: 100%;
	overflow: hidden;
	font-family: "Trebuchet MS", "Segoe UI", sans-serif;
	color: var(--text-color);
	background: linear-gradient(140deg, var(--bg-start), var(--bg-end));
}

#viewport {
	position: relative;
	width: 100vw;
	height: 100vh;
	overflow: hidden;
	/* 禁用默认触摸手势，交互由 JS 的翻页逻辑接管 */
	touch-action: none;
}

.v-track {
	width: 100%;
	height: 100%;
	transition: transform 0.56s ease;
}

.v-page {
	width: 100vw;
	height: 100vh;
	overflow: hidden;
}

.h-track {
	display: flex;
	width: 100%;
	height: 100%;
	transition: transform 0.56s ease;
}

.h-page {
	flex: 0 0 100vw;
	width: 100vw;
	height: 100vh;
	display: grid;
	place-items: center;
}

h1 {
	margin: 0;
	font-size: clamp(3rem, 10vw, 8rem);
	letter-spacing: 0.08em;
	font-weight: 700;
}

.dots {
	position: fixed;
	z-index: 10;
	display: flex;
	gap: 0.7rem;
}

.horizontal-dots {
	left: 50%;
	bottom: 1.4rem;
	transform: translateX(-50%);
}

body.footer-revealed .horizontal-dots {
	display: none;
}

.vertical-dots {
	right: 1.4rem;
	top: 50%;
	transform: translateY(-50%);
	flex-direction: column;
}

.dot {
	position: relative;
	display: inline-block;
	width: 0.68rem;
	height: 0.68rem;
	border-radius: 50%;
	background: var(--dot-inactive);
	cursor: pointer;
	transition: transform 0.28s ease, background-color 0.28s ease;
}

.dot.active {
	transform: scale(1.28);
	background: var(--dot-active);
}


/*
   旧逻辑：active 时显示 label
   .dot.active::after {
	content: attr(data-label);
	position: absolute;
	padding: 0.2rem 0.4rem;
	border-radius: 0.35rem;
	font-size: 0.78rem;
	line-height: 1;
	white-space: nowrap;
	background: rgba(255, 255, 255, 0.88);
	color: var(--text-color);
	transition: transform 0.2s ease;
	pointer-events: none;
   }
*/

/* 新逻辑：仅鼠标悬停到 dot 时显示 label */
.dot:hover::after {
	/* active dot 旁的页面信息标签，文本来自 data-label */
	content: attr(data-label);
	position: absolute;
	padding: 0.2rem 0.4rem;
	border-radius: 0.35rem;
	font-size: 0.78rem;
	line-height: 1;
	white-space: nowrap;
	background: rgba(255, 255, 255, 0.88);
	color: var(--text-color);
	transition: transform 0.2s ease;
	pointer-events: none;
}

.dot.active {
	animation: dot-pulse 0.22s ease;
}

/*
   旧逻辑：active 的纵向 dot 显示位置
   .vertical-dots .dot.active::after {
	top: 50%;
	right: calc(100% + 5px);
	left: auto;
	transform: translateY(-50%);
   }
*/

/* 右侧竖直 dot：标签固定显示在 dot 左侧 */
.vertical-dots .dot:hover::after {
	top: 50%;
	right: calc(100% + 5px);
	left: auto;
	transform: translateY(-50%);
}

/*
   旧逻辑：active 的横向 dot 显示位置
   .horizontal-dots .dot.active::after {
	top: auto;
	bottom: calc(100% + 5px);
	left: 50%;
	transform: translateX(-50%);
   }
*/

/* 底部水平 dot：标签固定显示在 dot 上方 */
.horizontal-dots .dot:hover::after {
	top: auto;
	bottom: calc(100% + 5px);
	left: 50%;
	transform: translateX(-50%);
}

/* 当 scroll.js 中标记为不显示标签时，仅显示 dot，不渲染文本标签 */
.dot:hover[data-hide-label="true"]::after {
	content: none;
}

@keyframes dot-pulse {
	0% {
		transform: scale(1);
	}

	100% {
		transform: scale(1.28);
	}
}

@media (max-width: 768px) {
	.vertical-dots {
		right: 0.9rem;
	}

	.horizontal-dots {
		bottom: 1rem;
	}

	.dot:hover::after {
		font-size: 0.72rem;
	}
}