/* ==========================================================================
   舞台层 —— 首页的「官网式」版式
   --------------------------------------------------------------------------
   参照游戏官网的舞台结构：一屏一场，信息压在四角，中间只留影像与大字。
   只作用于 body.tide-stage，文章页、归档页保持原来的阅读版式，不受影响。

   设计约定：
   1. 每节最小高度 = 一屏，节与节之间用 1px 发丝线分隔，不用色块。
   2. 卡片不是网格，而是「横向条带」：一屏放得下、可拖拽、滚动吸附。
   3. 所有装饰（序号、竖排 SCROLL、右侧导航）都不占用阅读流。
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 顶部导航：透明、居中、发丝线
   -------------------------------------------------------------------------- */

body.tide-stage .tide-header {
	background: none;
	border-bottom: 0;
	backdrop-filter: none;
	-webkit-backdrop-filter: none;
}

/* 顶部压一层极淡的黑色渐变，保证白字在任何画面上都读得清 */
body.tide-stage .tide-header::before {
	content: "";
	position: absolute;
	inset: 0 0 auto;
	height: 160%;
	pointer-events: none;
	background: linear-gradient(180deg, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0));
}

body.tide-stage .tide-header__inner {
	position: relative;
	justify-content: space-between;
	flex-wrap: nowrap;
}

body.tide-stage .tide-nav {
	position: absolute;
	left: 50%;
	transform: translateX(-50%);
}

body.tide-stage .tide-nav__list {
	gap: clamp(1.2rem, 3vw, 2.8rem);
}

body.tide-stage .tide-nav__link {
	position: relative;
	padding: 0.4em 0;
	color: rgba(255, 255, 255, 0.74);
	font-size: var(--tide-fs-xs);
	font-weight: 500;
	letter-spacing: 0.22em;
	text-transform: uppercase;
	transition: color var(--tide-dur) var(--tide-ease);
}

body.tide-stage .tide-nav__link:hover,
body.tide-stage .tide-nav__link:focus-visible {
	color: #fff;
}

/* 悬停时下方浮出一条渐变发丝线，形态参照官网导航 */
body.tide-stage .tide-nav__link::after {
	content: "";
	position: absolute;
	left: 50%;
	bottom: -2px;
	width: 0;
	height: 1px;
	background: linear-gradient(90deg, transparent, var(--tide-accent), transparent);
	transform: translateX(-50%);
	transition: width calc(0.5s * var(--tide-speed)) var(--tide-ease-ios);
}

body.tide-stage .tide-nav__link:hover::after,
body.tide-stage .tide-nav__link:focus-visible::after {
	width: 130%;
}

body.tide-stage .tide-brand__text {
	font-size: var(--tide-fs-sm);
	letter-spacing: 0.18em;
	text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   2. 首屏：满屏舞台
   -------------------------------------------------------------------------- */

body.tide-stage .tide-hero {
	min-height: 100vh;
	min-height: 100svh;
	padding-block: calc(var(--tide-header-h) + 3rem) clamp(4rem, 9vh, 7rem);
	align-items: flex-end;
}

body.tide-stage .tide-hero__inner {
	max-width: min(1180px, 100%);
	gap: clamp(1rem, 2vh, 1.6rem);
	place-items: start;
	text-align: left;
}

body.tide-stage .tide-hero__title {
	max-width: 18ch;
	font-size: calc(clamp(2.9rem, 8vw, 7rem) * var(--tide-hero-title-scale, 1));
	font-weight: 600;
	line-height: 0.98;
	letter-spacing: -0.035em;
}

body.tide-stage .tide-hero__sub {
	max-width: 34ch;
	color: rgba(255, 255, 255, 0.72);
	font-size: clamp(0.95rem, 1.2vw, 1.15rem);
	line-height: 1.8;
}

body.tide-stage .tide-hero__actions {
	gap: var(--tide-sp-3);
	margin-top: var(--tide-sp-3);
}

/* 按钮改成细描边，不用实心块，避免在影像上抢戏 */
body.tide-stage .tide-hero__actions .tide-btn {
	border: 1px solid rgba(255, 255, 255, 0.28);
	border-radius: 2px;
	background: rgba(255, 255, 255, 0.04);
	backdrop-filter: blur(6px);
	-webkit-backdrop-filter: blur(6px);
	letter-spacing: 0.08em;
}

body.tide-stage .tide-hero__actions .tide-btn--primary {
	border-color: rgba(var(--tide-accent-rgb), 0.55);
	background: rgba(var(--tide-accent-rgb), 0.12);
	box-shadow: none;
}

body.tide-stage .tide-hero__actions .tide-btn:hover {
	border-color: rgba(255, 255, 255, 0.7);
	background: rgba(255, 255, 255, 0.1);
}

/* 底部数据条：数字用等宽字体，单位做小字竖排感 */
body.tide-stage .tide-hero__stats {
	gap: clamp(1.6rem, 4vw, 3.4rem);
	margin-top: clamp(1rem, 3vh, 2rem);
	padding-top: var(--tide-sp-4);
	border-top: 1px solid rgba(255, 255, 255, 0.14);
	width: min(560px, 100%);
}

body.tide-stage .tide-hero__stat b {
	font-family: var(--tide-font-display);
	font-size: clamp(1.5rem, 2.4vw, 2rem);
	font-weight: 600;
	letter-spacing: -0.02em;
}

body.tide-stage .tide-hero__stat span {
	margin-top: 0.2em;
	color: rgba(255, 255, 255, 0.55);
	font-size: var(--tide-fs-xs);
	letter-spacing: 0.18em;
}

/* 「查看更多」挪到右下角，竖排，像官网页脚那个 SCROLL */
body.tide-stage .tide-hero__hint {
	right: clamp(1.4rem, 4vw, 3.5rem);
	left: auto;
	bottom: clamp(2rem, 8vh, 4.5rem);
	transform: none;
	flex-direction: column;
	align-items: center;
	gap: 0.9rem;
}

body.tide-stage .tide-hero__hint span:first-child {
	writing-mode: vertical-rl;
	letter-spacing: 0.4em;
	font-size: 10px;
	color: rgba(255, 255, 255, 0.5);
	text-transform: uppercase;
}

body.tide-stage .tide-hero__hint-track {
	width: 1px;
	height: 46px;
	background: rgba(255, 255, 255, 0.18);
}

/* --------------------------------------------------------------------------
   3. 章节：一屏一场
   -------------------------------------------------------------------------- */

body.tide-stage .tide-home > .tide-section {
	position: relative;
	display: flex;
	align-items: center;
	min-height: 100vh;
	min-height: 100svh;
	padding-block: clamp(4.5rem, 12vh, 8rem);
	border-top: 1px solid rgba(255, 255, 255, 0.07);
	scroll-snap-align: start;
	/* 全局给锚点留了 96px 的导航高度；舞台里每节要顶齐视口，
	   所以把这 96px 抵掉，否则每屏上方都会露出上一屏的一条边。 */
	scroll-margin-top: -96px;
	/* 壁纸是照片，直接铺字会糊成一片。这里压一层上浅下深的暗幕：
	   顶部还留一点画面纹理，底部收到接近纯黑，保证卡片和正文可读。 */
	background: linear-gradient(
		180deg,
		rgba(4, 6, 11, calc(var(--tide-stage-scrim, 0.72) * 0.58)) 0%,
		rgba(4, 6, 11, var(--tide-stage-scrim, 0.72)) 46%,
		rgba(4, 6, 11, min(1, calc(var(--tide-stage-scrim, 0.72) + 0.21))) 100%
	);
}

/* 条带用了 100vw 做全出血，浏览器有竖向滚动条时会多出几像素，
   这里裁掉横向溢出。用 clip 而不是 hidden，避免造出新的滚动容器。 */
body.tide-stage {
	overflow-x: clip;
}

@supports not (overflow: clip) {
	body.tide-stage {
		overflow-x: hidden;
	}
}

/* 角落的巨大序号：由 JS 写入 data-stage，纯装饰 */
body.tide-stage .tide-section[data-stage]::before {
	content: attr(data-stage);
	position: absolute;
	top: 50%;
	right: clamp(1rem, 4vw, 4rem);
	transform: translateY(-50%);
	font-family: var(--tide-font-display);
	font-size: clamp(7rem, 15vw, 15rem);
	font-weight: 600;
	line-height: 0.8;
	letter-spacing: -0.05em;
	color: transparent;
	-webkit-text-stroke: 1px rgba(255, 255, 255, 0.07);
	pointer-events: none;
	user-select: none;
}

body.tide-stage .tide-section > .tide-container {
	width: 100%;
}

body.tide-stage .tide-section__head {
	margin-bottom: clamp(1.8rem, 5vh, 3.2rem);
}

body.tide-stage .tide-section__title {
	margin-bottom: 0.35em;
	font-size: clamp(2rem, 4.6vw, 3.6rem);
	font-weight: 600;
	line-height: 1.06;
	letter-spacing: -0.03em;
}

body.tide-stage .tide-section__desc {
	max-width: 46ch;
	color: rgba(255, 255, 255, 0.55);
	font-size: var(--tide-fs-sm);
	line-height: 1.9;
}

body.tide-stage .tide-more {
	color: rgba(255, 255, 255, 0.6);
	font-size: var(--tide-fs-xs);
	letter-spacing: 0.16em;
	text-transform: uppercase;
}

body.tide-stage .tide-more:hover {
	color: var(--tide-accent);
}

/* --------------------------------------------------------------------------
   4. 横向条带：把卡片网格改成可拖拽的一行
   -------------------------------------------------------------------------- */

/* 首尾对齐量：容器左边距 + 容器自身的左右内边距，
   这样第一张卡片的左边缘正好和上面的标题对齐。 */
body.tide-stage {
	--tide-stage-pad: max(24px, calc(50vw - var(--tide-container) / 2 + clamp(1rem, 4vw, 2.5rem)));
}

body.tide-stage .tide-grid,
body.tide-stage .tide-portfolio,
body.tide-stage .tide-postlist,
body.tide-stage .tide-album__grid,
body.tide-stage .tide-masonry {
	display: flex;
	flex-wrap: nowrap;
	align-items: stretch;
	gap: clamp(14px, 1.8vw, 26px);

	/* 全出血：从左边缘一直滑出右边缘 */
	width: 100vw;
	margin-inline: calc(50% - 50vw) 0;
	padding-inline: var(--tide-stage-pad);
	padding-bottom: 0.5rem;

	/* 吸附点要算上首尾内边距，否则浏览器会把第一张卡吸到容器边缘，
	   开头那张卡就贴死在屏幕左边、和标题对不齐。 */
	scroll-padding-inline: var(--tide-stage-pad);

	overflow-x: auto;
	overflow-y: hidden;
	scroll-snap-type: x proximity;
	scrollbar-width: none;
	-webkit-overflow-scrolling: touch;
}

body.tide-stage .tide-grid::-webkit-scrollbar,
body.tide-stage .tide-portfolio::-webkit-scrollbar,
body.tide-stage .tide-postlist::-webkit-scrollbar,
body.tide-stage .tide-album__grid::-webkit-scrollbar,
body.tide-stage .tide-masonry::-webkit-scrollbar {
	display: none;
}

/* 每一张卡固定宽度，保证一屏露出「一张半」，暗示还能往右滑 */
body.tide-stage .tide-grid > *,
body.tide-stage .tide-portfolio > *,
body.tide-stage .tide-postlist > *,
body.tide-stage .tide-album__grid > *,
body.tide-stage .tide-masonry > * {
	flex: 0 0 auto;
	width: min(var(--tide-stage-card-w, 360px), 72vw);
	max-width: none;
	scroll-snap-align: start;
}

body.tide-stage .tide-masonry {
	columns: auto;
}

body.tide-stage .tide-masonry > * {
	height: min(54vh, 460px);
	margin: 0;
}

body.tide-stage .tide-masonry > * img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

/* 拖拽时关掉吸附，手指才不会「被吸走」 */
body.tide-strip-dragging .tide-grid,
body.tide-strip-dragging .tide-portfolio,
body.tide-strip-dragging .tide-postlist,
body.tide-strip-dragging .tide-album__grid,
body.tide-strip-dragging .tide-masonry {
	scroll-snap-type: none;
	cursor: grabbing;
}

body.tide-stage .tide-grid,
body.tide-stage .tide-portfolio,
body.tide-stage .tide-postlist,
body.tide-stage .tide-album__grid,
body.tide-stage .tide-masonry {
	cursor: grab;
}

/* 关于我：不用条带，居中窄栏 */
body.tide-stage #tide-about {
	text-align: center;
}

body.tide-stage #tide-about .tide-section__head {
	margin-inline: auto;
}

body.tide-stage #tide-about .tide-section__desc {
	margin-inline: auto;
}

/* --------------------------------------------------------------------------
   5. 右侧章节导航（JS 生成）
   -------------------------------------------------------------------------- */

.tide-rail {
	position: fixed;
	right: clamp(1rem, 2.4vw, 2.2rem);
	top: 50%;
	z-index: var(--tide-z-sticky);
	display: grid;
	gap: 1.1rem;
	transform: translateY(-50%);
}

.tide-rail__item {
	display: flex;
	align-items: center;
	justify-content: flex-end;
	gap: 0.7rem;
	color: rgba(255, 255, 255, 0.42);
	font-family: var(--tide-font-mono);
	font-size: 10px;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	cursor: pointer;
	background: none;
	border: 0;
	padding: 0;
	text-shadow: 0 1px 6px rgba(0, 0, 0, 0.6);
	transition: color var(--tide-dur) var(--tide-ease);
}

.tide-rail__item::before {
	content: "";
	width: 14px;
	height: 1px;
	background: currentColor;
	transition: width calc(0.45s * var(--tide-speed)) var(--tide-ease-ios);
}

.tide-rail__item:hover,
.tide-rail__item.is-active {
	color: #fff;
}

.tide-rail__item.is-active::before {
	width: 30px;
}

@media (max-width: 900px) {
	.tide-rail {
		display: none;
	}
}

/* --------------------------------------------------------------------------
   6. 开屏：黑场 → 标志 → 中心圆形扩散
   --------------------------------------------------------------------------
   黑场是一层全屏纯黑，再用 mask 在中间「挖」一个透明圆；
   圆半径由 JS 逐帧写进 --tide-hole，看上去就是黑幕从中心被吹开。

   为什么不用 box-shadow / transform：阴影会跟着元素一起被缩放，
   缩到 0 时连黑场也没了；遮罩只改一个长度值，黑场始终真实存在。
   -------------------------------------------------------------------------- */

.tide-splash {
	position: fixed;
	inset: 0;
	z-index: 300;
	display: grid;
	place-items: center;
}

/* 黑场本体：一个「中间透明、外面全黑」的径向渐变。
   不用 mask-image —— 实测遮罩会被栅格化到较低分辨率，
   圆形边缘发虚；直接画渐变则按 1:1 抗锯齿，边缘干净。 */
.tide-splash__veil {
	position: absolute;
	inset: 0;
	--tide-hole: 0px;
	background: radial-gradient(
		circle at 50% 50%,
		rgba(0, 0, 0, 0) 0,
		rgba(0, 0, 0, 0) var(--tide-hole),
		#000 calc(var(--tide-hole) + 3px)
	);
}

/* 标志浮在黑场之上，揭幕时自己退场 */
.tide-splash__logo {
	position: relative;
	z-index: 1;
	display: grid;
	place-items: center;
	opacity: 0;
	transform: scale(0.82);
	filter: drop-shadow(0 0 46px rgba(var(--tide-accent-rgb), 0.4));
	transition:
		opacity 0.62s var(--tide-ease-ios),
		transform 1.1s var(--tide-ease-bounce);
}

.tide-splash.is-in .tide-splash__logo {
	opacity: 1;
	transform: scale(1);
}

.tide-splash.is-opening .tide-splash__logo {
	opacity: 0;
	transform: scale(1.12);
	transition-duration: 0.42s;
	transition-timing-function: var(--tide-ease-ios-in);
}

/* 站点名首字的渐变方块，放到开屏要够大 */
.tide-splash__logo .tide-brand__mark {
	width: var(--tide-splash-logo, 104px);
	height: var(--tide-splash-logo, 104px);
	border-radius: calc(var(--tide-splash-logo, 104px) * 0.29);
	font-size: calc(var(--tide-splash-logo, 104px) * 0.29);
	box-shadow: 0 0 70px rgba(var(--tide-accent-rgb), 0.42);
}

/* Logo 下面那行小字，留空时不输出节点 */
.tide-splash__logo em {
	margin-top: 1.4rem;
	font-style: normal;
	font-family: var(--tide-font-mono);
	font-size: 10px;
	letter-spacing: 0.42em;
	text-indent: 0.42em;
	color: rgba(255, 255, 255, 0.45);
	text-transform: uppercase;
}

/* 站长上传了自定义 Logo 时用图片 */
.tide-splash__logo img {
	width: auto;
	max-width: min(230px, 44vw);
	max-height: 130px;
	object-fit: contain;
}

body.tide-intro {
	overflow: hidden;
}

/* 开屏期间连右侧滚动条一起藏掉，否则黑场上会多一条灰边 */
html.tide-intro-on {
	overflow: hidden;
}

/* 首帧黑场：JS 还没跑起来之前先把画面盖住，
   否则首页会先闪一下内容再变黑。类名由 <head> 里的内联脚本加上。 */
html.tide-booting::before {
	content: "";
	position: fixed;
	inset: 0;
	z-index: 299;
	background: #000;
	/* 兜底：万一 tide.js 没加载成功，六秒后自动淡出，
	   绝不能让访客一直盯着一块黑屏。 */
	animation: tide-boot-failsafe 0.6s ease 6s forwards;
}

@keyframes tide-boot-failsafe {
	to {
		opacity: 0;
		visibility: hidden;
	}
}

/* 关了动效就完全不出现 */
body.tide-no-anim .tide-splash {
	display: none;
}

@media (prefers-reduced-motion: reduce) {
	.tide-splash {
		display: none;
	}
}

/* --------------------------------------------------------------------------
   7. 小屏适配
   -------------------------------------------------------------------------- */

@media (max-width: 720px) {
	body.tide-stage .tide-nav {
		display: none;
	}

	body.tide-stage .tide-hero__title {
		font-size: clamp(2.4rem, 11vw, 4rem);
	}

	body.tide-stage .tide-hero__hint {
		display: none;
	}

	body.tide-stage .tide-section[data-stage]::before {
		font-size: 6rem;
		right: 0.5rem;
		opacity: 0.7;
	}

	body.tide-stage .tide-grid > *,
	body.tide-stage .tide-portfolio > *,
	body.tide-stage .tide-postlist > *,
	body.tide-stage .tide-album__grid > *,
	body.tide-stage .tide-masonry > * {
		width: min(300px, 78vw);
	}
}

/* --------------------------------------------------------------------------
   8. 关闭动效 / 减弱动态：退回静态排版
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
	body.tide-stage .tide-section {
		scroll-snap-align: none;
	}
}

/* --------------------------------------------------------------------------
   9. 细节修整
   -------------------------------------------------------------------------- */

/* 关于我：收紧成一个居中的双栏块，头像不要被推到版心最左边 */
body.tide-stage #tide-about .tide-about {
	max-width: 960px;
	margin-inline: auto;
	grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
	gap: clamp(1.6rem, 4vw, 3.4rem);
	align-items: center;
	text-align: left;
}

body.tide-stage #tide-about .tide-about__avatar {
	width: 100%;
	max-width: 200px;
}

body.tide-stage #tide-about .tide-about__body p {
	color: rgba(255, 255, 255, 0.62);
	line-height: 2;
}

body.tide-stage #tide-about .tide-social {
	justify-content: flex-start;
	margin-top: var(--tide-sp-4);
}

/* 导轨在亮画面上也要读得清：靠文字阴影，而不是压一块深色方块 */
.tide-rail__item {
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.9), 0 0 14px rgba(0, 0, 0, 0.55);
}

/* 相册条带：高度交错，形成编辑式的节奏，而不是一排等高的方块 */
body.tide-stage .tide-masonry {
	align-items: center;
}

body.tide-stage .tide-masonry > *:nth-child(3n + 1) { height: min(52vh, 440px); }
body.tide-stage .tide-masonry > *:nth-child(3n + 2) { height: min(62vh, 520px); }
body.tide-stage .tide-masonry > *:nth-child(3n)     { height: min(46vh, 380px); }
/* 首屏左下角的暗角：壁纸再亮，标题和按钮也压得住 */
body.tide-stage .tide-hero::after {
	content: "";
	position: absolute;
	inset: 0;
	z-index: -1;
	pointer-events: none;
	background:
		radial-gradient(120% 95% at 12% 88%, rgba(4, 6, 11, 0.88) 0%, rgba(4, 6, 11, 0.42) 42%, rgba(4, 6, 11, 0) 72%),
		linear-gradient(180deg, rgba(4, 6, 11, 0.45) 0%, rgba(4, 6, 11, 0) 30%);
}
/* --------------------------------------------------------------------------
   10. 整屏吸附与矮屏适配
   -------------------------------------------------------------------------- */

/* 每节正好一屏，滚动停手后轻轻吸到节的边界。
   用 proximity 而不是 mandatory：不会把人「吸住」，长内容仍可自由滚。
   只对首页生效，且要浏览器支持 :has() 才启用，老浏览器自然忽略。 */
@supports selector(:has(*)) {
	html:has(body.tide-stage) {
		scroll-snap-type: y proximity;
	}
}

/* 矮屏（笔记本、横屏手机）：把卡片压矮，保证一屏放得下 */
@media (max-height: 820px) {
	body.tide-stage .tide-masonry > *:nth-child(3n + 1) { height: min(44vh, 340px); }
	body.tide-stage .tide-masonry > *:nth-child(3n + 2) { height: min(52vh, 400px); }
	body.tide-stage .tide-masonry > *:nth-child(3n)     { height: min(38vh, 300px); }

	body.tide-stage .tide-section__title {
		font-size: clamp(1.8rem, 3.8vw, 2.8rem);
	}

	body.tide-stage .tide-section__head {
		margin-bottom: clamp(1.2rem, 3.4vh, 2rem);
	}
}
/* --------------------------------------------------------------------------
   11. 明暗模式
   --------------------------------------------------------------------------
   舞台是「深色影像」这一种场景，下面永远压着照片和暗幕，所以文字不跟随
   明暗模式——否则亮色模式下会变成深灰字压在深色画面上，直接读不清。
   卡片仍按站长的明暗设置走（亮色模式下是浅色卡片），保留对比层次。 */

body.tide-stage .tide-brand__text,
body.tide-stage .tide-hero__title,
body.tide-stage .tide-section__title {
	color: #f4f7fb;
}

body.tide-stage .tide-hero__sub,
body.tide-stage .tide-section__desc {
	color: rgba(255, 255, 255, 0.6);
}

body.tide-stage .tide-more {
	color: rgba(255, 255, 255, 0.62);
}

body.tide-stage .tide-iconbtn {
	color: rgba(255, 255, 255, 0.82);
}

body.tide-stage .tide-rail__item {
	color: rgba(255, 255, 255, 0.45);
}

body.tide-stage .tide-rail__item.is-active {
	color: #fff;
}
/* --------------------------------------------------------------------------
   12. 后台开关对应的隐藏规则
   -------------------------------------------------------------------------- */

body.tide-no-rail .tide-rail {
	display: none;
}

body.tide-no-index .tide-section[data-stage]::before {
	display: none;
}

@supports selector(:has(*)) {
	html:has(body.tide-no-snap) {
		scroll-snap-type: none;
	}
}