/* ============================================================
   GoutouStdio 站点样式（与 tokens.css 配合使用）
   风格：深色科技风。近黑底、玻璃质感卡片、紫→青渐变点缀、
   首屏极光与网格背景、鼠标跟随高光。
   动画由 js/motion.js（GSAP + ScrollTrigger + Lenis）驱动；
   这里只放静态外观、悬停过渡、@keyframes 和无脚本时的兜底。
   组件只引用 --pg-*，不写死颜色与 4px 以上的尺寸（CI 会检查）。
   opacity 只出现在 @keyframes 和白名单里的装饰伪元素上（CI 会检查）。
   ============================================================ */

/* ---------- 基础 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--pg-header-h) + var(--pg-space-4));
}
html[data-theme="dark"] { color-scheme: dark; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* Lenis 接管滚动时要求原生平滑滚动关闭 */
html.lenis, html.lenis body { height: auto; scroll-behavior: auto; }
.lenis.lenis-stopped { overflow: clip; }
.lenis.lenis-smooth iframe { pointer-events: none; }
.lenis [data-lenis-prevent] { overscroll-behavior: contain; }

body {
  position: relative;
  margin: 0;
  font-family: var(--pg-font-sans);
  font-size: var(--pg-text-md);
  line-height: var(--pg-leading-body);
  color: var(--pg-fg-1);
  background: var(--pg-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "cv11", "ss01";
  text-rendering: optimizeLegibility;
  /* 中西文之间自动留出间距、行首行尾标点挤压、避免标点出现在行首 */
  text-autospace: normal;
  text-spacing-trim: normal;
  line-break: strict;
}

/* 段落最后一行不要只剩一两个字 */
p, li, td, dd, figcaption { text-wrap: pretty; }

/* 全站颗粒质感：纯装饰的噪点层，不含文字，不接收指针事件 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: var(--pg-noise-strength);
}

img { display: block; max-width: 100%; height: auto; }

a {
  color: var(--pg-accent);
  text-decoration-thickness: var(--pg-hairline);
  text-underline-offset: 0.22em;
  transition: color var(--pg-dur-1) ease, text-decoration-color var(--pg-dur-1) ease;
}
a:hover { color: var(--pg-accent-hover); }

:focus-visible {
  outline: var(--pg-stroke) solid var(--pg-focus);
  outline-offset: 0.1875rem;
  border-radius: var(--pg-radius-sm);
}

::selection { color: var(--pg-on-ink); background: var(--pg-brand); }

[hidden] { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--pg-space-3);
  top: -4rem;
  z-index: 120;
  padding: var(--pg-space-2) var(--pg-space-4);
  background: var(--pg-ink);
  color: var(--pg-on-ink);
  border-radius: var(--pg-radius-pill);
}
.skip-link:focus { top: var(--pg-space-2); color: var(--pg-on-ink); }

.container {
  width: 100%;
  max-width: var(--pg-container);
  margin-inline: auto;
  padding-inline: var(--pg-space-5);
}

.nowrap { white-space: nowrap; }

/* 滚动条：细、低调，跟随主题 */
html { scrollbar-color: var(--pg-line-strong) var(--pg-bg-page); scrollbar-width: thin; }

/* ---------- 标题 ---------- */
h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--pg-font-display);
  font-weight: 650;
  line-height: var(--pg-leading-display);
  letter-spacing: var(--pg-tracking-display);
  color: var(--pg-fg-1);
  text-wrap: balance;
}
h1 { font-size: var(--pg-text-hero); font-weight: 700; }
h2 { font-size: var(--pg-text-2xl); }
h3 { font-size: var(--pg-text-xl); line-height: var(--pg-leading-tight); letter-spacing: -0.02em; }
h4 {
  font-family: var(--pg-font-sans);
  font-size: var(--pg-text-md);
  font-weight: 700;
  line-height: var(--pg-leading-tight);
  letter-spacing: 0;
}

p, ul, ol, dl, pre, table, figure { margin: 0; }
ul, ol { padding-left: var(--pg-space-5); }
li + li { margin-top: var(--pg-space-1); }
li::marker { color: var(--pg-fg-3); }
strong { font-weight: 700; }

.lede {
  max-width: var(--pg-measure);
  font-size: var(--pg-text-lg);
  line-height: 1.7;
  color: var(--pg-fg-2);
  text-wrap: pretty;
}
.small { font-size: var(--pg-text-sm); color: var(--pg-fg-3); }

/* 渐变文字：首屏标题用冷灰渐变，.grad 用品牌渐变。
   脚本拆字后，渐变改由每一行 / 每个字自己承担，避免父元素的裁切留下静止的重影。 */
.hero h1,
.hero h1.is-split .pg-line,
.hero h1.is-split .pg-char {
  background: var(--pg-grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}
.hero h1.is-split { background: none; }
.hero h1 .grad,
.hero h1.is-split .grad {
  background: var(--pg-grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}
.pg-line-mask { padding-bottom: 0.08em; margin-bottom: -0.08em; }

/* ---------- 页眉 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--pg-bg-glass);
  border-bottom: var(--pg-hairline) solid var(--pg-line-glass);
  -webkit-backdrop-filter: saturate(1.6) blur(var(--pg-blur));
  backdrop-filter: saturate(1.6) blur(var(--pg-blur));
  view-transition-name: site-header;
  transition: transform var(--pg-dur-3) var(--pg-ease-out),
    box-shadow var(--pg-dur-2) ease, background-color var(--pg-dur-2) ease;
}
.site-header.is-scrolled { box-shadow: var(--pg-shadow); }
.site-header.is-hidden { transform: translateY(-100%); }

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--pg-space-4);
  min-height: var(--pg-header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--pg-space-2);
  font-family: var(--pg-font-display);
  font-size: var(--pg-text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--pg-fg-1);
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover { color: var(--pg-fg-1); }
.brand-mark { width: 1.75rem; height: 1.75rem; flex: none; overflow: visible; }
.brand-mark rect { transform-box: fill-box; transform-origin: left center; transition: transform var(--pg-dur-3) var(--pg-ease-spring); }
.brand-mark .m1 { fill: var(--pg-fg-1); }
.brand-mark .m2 { fill: var(--pg-brand); }
.brand-mark .m3 { fill: var(--pg-brand-2); }
.brand:hover .m1 { transform: scaleX(0.72); }
.brand:hover .m2 { transform: scaleX(0.86); transition-delay: 40ms; }
.brand:hover .m3 { transform: scaleX(0.6); transition-delay: 80ms; }

.site-nav { position: relative; margin-left: auto; }
.site-nav > ul {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--pg-space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav li + li { margin-top: 0; }
.site-nav a,
.site-nav summary {
  position: relative;
  z-index: 1;
  display: block;
  padding: var(--pg-space-2) var(--pg-space-3);
  font-size: var(--pg-text-sm);
  font-weight: 500;
  color: var(--pg-fg-2);
  text-decoration: none;
  border-radius: var(--pg-radius-pill);
  cursor: pointer;
  transition: color var(--pg-dur-1) ease, background-color var(--pg-dur-1) ease;
}
.site-nav a:hover,
.site-nav summary:hover { color: var(--pg-fg-1); background: var(--pg-accent-soft); }
.site-nav.has-indicator > ul > li > a:hover,
.site-nav.has-indicator > ul > li > details > summary:hover { background: transparent; }
.site-nav a[aria-current="page"],
.site-nav .menu.is-current > summary { color: var(--pg-fg-1); font-weight: 650; }
.site-nav > ul > li > a[aria-current="page"]::after,
.site-nav .menu.is-current > summary::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.125rem;
  width: 1rem;
  height: var(--pg-stroke);
  margin-left: -0.5rem;
  background: var(--pg-grad-brand);
  border-radius: var(--pg-radius-pill);
}
/* 跟随鼠标滑动的导航高亮块，由脚本插入 */
.nav-indicator {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  height: 0;
  pointer-events: none;
  background: var(--pg-accent-soft);
  border: var(--pg-hairline) solid var(--pg-line-glass);
  border-radius: var(--pg-radius-pill);
  visibility: hidden;
}

/* 下拉菜单：原生 details，没有脚本也能点开 */
.menu { position: relative; }
.menu > summary { list-style: none; }
.menu > summary::-webkit-details-marker { display: none; }
.menu > summary { display: flex; align-items: center; gap: var(--pg-space-1); }
.menu > summary .chev { width: 1em; height: 1em; vertical-align: 0; transition: transform var(--pg-dur-2) var(--pg-ease-spring); }
.menu[open] > summary .chev { transform: rotate(180deg); }
.menu > ul a { display: flex; align-items: center; gap: var(--pg-space-3); border-radius: var(--pg-radius); }
.menu > ul a .icon { color: var(--pg-fg-3); vertical-align: 0; transition: color var(--pg-dur-1) ease, transform var(--pg-dur-2) var(--pg-ease-spring); }
.menu > ul a:hover .icon { color: var(--pg-accent); transform: scale(1.12); }
.site-nav a .ext { width: 0.9em; height: 0.9em; margin-left: var(--pg-space-1); vertical-align: -0.1em; color: var(--pg-fg-3); transition: transform var(--pg-dur-2) var(--pg-ease-out); }
.site-nav a:hover .ext { transform: translate(0.125rem, -0.125rem); }
.menu > ul {
  position: absolute;
  top: calc(100% + var(--pg-space-2));
  left: 50%;
  z-index: 55;
  min-width: 14rem;
  margin: 0;
  padding: var(--pg-space-2);
  list-style: none;
  background: var(--pg-bg-raised);
  border: var(--pg-hairline) solid var(--pg-line-2);
  border-radius: var(--pg-radius-lg);
  box-shadow: var(--pg-shadow-lg);
  transform: translateX(-50%);
  transform-origin: top center;
}
.menu[open] > ul { animation: pg-pop var(--pg-dur-2) var(--pg-ease-out) both; }
.menu > ul li + li { margin-top: 0.125rem; }
.menu > ul a { white-space: nowrap; }

.header-actions { display: flex; align-items: center; gap: var(--pg-space-2); }
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  min-height: 2.25rem;
  padding: 0;
  font: inherit;
  font-size: var(--pg-text-sm);
  color: var(--pg-fg-2);
  background: var(--pg-bg-card);
  border: var(--pg-hairline) solid var(--pg-line-strong);
  border-radius: var(--pg-radius-pill);
  cursor: pointer;
  transition: color var(--pg-dur-1) ease, border-color var(--pg-dur-1) ease,
    transform var(--pg-dur-2) var(--pg-ease-spring), box-shadow var(--pg-dur-2) ease;
}
.icon-btn:hover { color: var(--pg-fg-1); border-color: var(--pg-accent); box-shadow: var(--pg-glow); }
.icon-btn:active { transform: scale(0.92); }
.nav-toggle { display: none; }
.icon-btn .icon { vertical-align: 0; }
.icon-sun { display: none; }
body.theme-dark .icon-sun { display: inline; }
body.theme-dark .icon-moon { display: none; }
.icon-sun, .icon-moon { animation: pg-spin-in var(--pg-dur-3) var(--pg-ease-spring) both; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: inline; }

/* 阅读进度条，由脚本插入 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 70;
  height: var(--pg-stroke);
  background: var(--pg-grad-brand);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  isolation: isolate;
  /* 极光比首屏宽，只在水平方向裁掉；竖直方向放开，让它延伸到半透明页眉底下 */
  overflow-x: clip;
  padding-block: var(--pg-space-9) var(--pg-space-8);
}
/* 极光：三团径向渐变缓慢旋转；--ax/--ay 由脚本按鼠标位置写入做视差 */
.hero::before {
  content: "";
  position: absolute;
  z-index: -2;
  top: calc(var(--pg-header-h) * -1 - 10rem);
  left: -15%;
  right: -15%;
  bottom: -6rem;
  pointer-events: none;
  background:
    radial-gradient(38% 46% at 22% 32%, var(--pg-aurora-1), transparent 70%),
    radial-gradient(32% 42% at 78% 22%, var(--pg-aurora-2), transparent 70%),
    radial-gradient(28% 36% at 58% 74%, var(--pg-aurora-3), transparent 70%);
  translate: calc(var(--ax, 0) * 2.5rem) calc(var(--ay, 0) * 2rem);
  animation: pg-aurora var(--pg-dur-aurora) ease-in-out infinite alternate;
}
/* 网格：从顶部向下淡出 */
.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: calc(var(--pg-header-h) * -1);
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--pg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--pg-grid) 1px, transparent 1px);
  background-size: 3.5rem 3.5rem;
  background-position: center top;
  -webkit-mask-image: radial-gradient(ellipse 75% 70% at 50% 0%, black 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 75% 70% at 50% 0%, black 20%, transparent 75%);
}
.hero .lede { margin-top: var(--pg-space-5); }
.hero .actions { margin-top: var(--pg-space-6); }
.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: var(--pg-space-7);
  align-items: center;
}
.hero-compact { padding-block: var(--pg-space-8) var(--pg-space-7); }
.hero-compact h1, .hero-split h1 { font-size: var(--pg-text-page); }
.hero-split:has(.hero-art-svg) h1 { font-size: var(--pg-text-hero); }
.hero-badge { margin-bottom: var(--pg-space-4); }
.hero-art { position: relative; min-width: 0; }
/* 首屏截图背后的光晕 */
.hero-art::before,
.hero-art-svg::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 10% 5%;
  pointer-events: none;
  background: radial-gradient(closest-side, var(--pg-glow-clay), transparent);
}

/* 未开始动画前先藏住首屏，脚本接管后由 GSAP 控制；脚本 3 秒内没跑起来会自动撤掉这层 */
html.motion:not(.motion-ready) .hero :is(h1, .lede, .actions, .hero-badge, .spec, figure) { visibility: hidden; }

/* 版本、架构、许可等关键事实，一行排开 */
.spec {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: var(--pg-space-4) var(--pg-space-5);
  margin-top: var(--pg-space-7);
  padding-top: var(--pg-space-5);
  border-top: var(--pg-hairline) solid var(--pg-line-2);
}
.spec dt {
  font-family: var(--pg-font-mono);
  font-size: var(--pg-text-2xs);
  letter-spacing: var(--pg-tracking-label);
  text-transform: uppercase;
  color: var(--pg-fg-3);
}
.spec dd { margin: var(--pg-space-1) 0 0; font-size: var(--pg-text-sm); font-weight: 600; overflow-wrap: anywhere; }

/* ---------- 分区 ---------- */
.section {
  position: relative;
  padding-block: var(--pg-space-9);
  /* 入场前的位移和 3D 翻转可能超出屏幕宽度，横向裁掉，免得窄屏出现横向滚动 */
  overflow-x: clip;
}
/* 分区顶部一条中间亮、两端淡出的渐变细线 */
.section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: min(var(--pg-container), 100%);
  height: 1px;
  background: var(--pg-grad-line);
  transform: translateX(-50%);
  pointer-events: none;
}
.section-tint { background: var(--pg-bg-sunken); }
.section-head { max-width: var(--pg-measure); margin-bottom: var(--pg-space-7); }
.section-head h2 + .lede { margin-top: var(--pg-space-4); }

/* 小节标题上方一小段品牌渐变短线 */
.section-head h2::before,
.split > h2::before,
.archive-title::before {
  content: "";
  display: block;
  width: 2.25rem;
  height: 0.1875rem;
  margin-bottom: var(--pg-space-4);
  background: var(--pg-grad-brand);
  border-radius: var(--pg-radius-pill);
}
.archive-title::before { display: inline-block; width: 1.25rem; margin: 0 var(--pg-space-2) 0 0; vertical-align: middle; }

/* 左边小节标题，右边正文 */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: var(--pg-space-7);
  align-items: start;
}
.split > h2 {
  position: sticky;
  top: calc(var(--pg-header-h) + var(--pg-space-5));
  font-size: var(--pg-text-xl);
  line-height: var(--pg-leading-tight);
  letter-spacing: -0.02em;
}
.split > div { min-width: 0; }
.split > .split-head { position: sticky; top: calc(var(--pg-header-h) + var(--pg-space-5)); }
.split-head h2 { font-size: var(--pg-text-xl); line-height: var(--pg-leading-tight); letter-spacing: -0.02em; }

.stack > * + * { margin-top: var(--pg-space-4); }
.stack > h3 { margin-top: var(--pg-space-7); }
.stack > h3:first-child { margin-top: 0; }
.prose { max-width: var(--pg-measure); }

/* ---------- 通用卡片外观 ---------- */
.tile,
.flow > li,
.release,
.table-wrap,
.notice {
  background: var(--pg-bg-card);
  border: var(--pg-hairline) solid var(--pg-line-glass);
  box-shadow: inset 0 1px 0 var(--pg-line-hi);
}

/* 鼠标跟随高光：脚本给卡片加 .spot 并写入 --mx/--my。
   ::before 是内部柔光，::after 是只照亮描边的光圈，两者都是纯装饰。 */
.spot { position: relative; isolation: isolate; }
.spot::before,
.spot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--pg-dur-2) ease;
}
.spot::before {
  z-index: -1;
  background: radial-gradient(22rem circle at var(--mx, 50%) var(--my, 50%), var(--pg-spot), transparent 70%);
}
.spot::after {
  z-index: 1;
  padding: var(--pg-hairline);
  background: radial-gradient(16rem circle at var(--mx, 50%) var(--my, 50%), var(--pg-brand), transparent 70%);
  -webkit-mask: linear-gradient(black 0 0) content-box, linear-gradient(black 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(black 0 0) content-box exclude, linear-gradient(black 0 0);
}
.spot:hover::before,
.spot:hover::after { opacity: 1; }

/* ---------- 项目卡片 ---------- */
.tiles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--pg-space-5);
  perspective: 75rem;
}
.tile {
  --glow: var(--pg-glow-clay);
  display: flex;
  flex-direction: column;
  gap: var(--pg-space-3);
  min-width: 0;
  padding: var(--pg-space-6);
  overflow: hidden;
  border-radius: var(--pg-radius-xl);
  transform-style: preserve-3d;
  transition: border-color var(--pg-dur-2) ease, box-shadow var(--pg-dur-2) ease;
}
.tile:hover { border-color: var(--pg-line-strong); box-shadow: var(--pg-shadow-lg); }
.tile h3 { font-size: var(--pg-text-2xl); }
.tile p { color: var(--pg-fg-2); }
.tile .status { display: flex; flex-wrap: wrap; align-items: center; gap: var(--pg-space-2); margin: 0; font-size: var(--pg-text-sm); color: var(--pg-fg-2); }
.tile-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--pg-space-1) var(--pg-space-5);
  margin-top: auto;
  padding-top: var(--pg-space-4);
  font-size: var(--pg-text-sm);
  font-weight: 600;
  border-top: var(--pg-hairline) solid var(--pg-line-glass);
}
.tile a { color: var(--pg-fg-1); text-decoration: none; }
.tile a:hover { color: var(--pg-accent-hover); }
.tile-links a { display: inline-flex; align-items: center; gap: var(--pg-space-1); }
.tile-links a .icon { transition: transform var(--pg-dur-2) var(--pg-ease-spring); }
.tile-links a:hover .icon { transform: translateY(0.1875rem); }
.tile-clay { --glow: var(--pg-glow-clay); background: radial-gradient(120% 70% at 100% 0%, var(--glow), transparent 55%), var(--pg-tile-clay); }
.tile-sky { --glow: var(--pg-glow-sky); background: radial-gradient(120% 70% at 100% 0%, var(--glow), transparent 55%), var(--pg-tile-sky); }
.tile-sage { --glow: var(--pg-glow-sage); background: radial-gradient(120% 70% at 100% 0%, var(--glow), transparent 55%), var(--pg-tile-sage); }

.archive-title { margin: var(--pg-space-8) 0 var(--pg-space-4); font-size: var(--pg-text-xl); }
.archive-title .icon { color: var(--pg-fg-3); }

/* ---------- 行列表：历史、存档、版本 ---------- */
.rows { margin: 0; padding: 0; list-style: none; }
.rows > li {
  position: relative;
  display: grid;
  grid-template-columns: 8rem minmax(0, 1fr);
  gap: var(--pg-space-4);
  margin: 0;
  padding: var(--pg-space-5) 0;
  border-top: var(--pg-hairline) solid var(--pg-line-2);
  transition: background-color var(--pg-dur-2) ease;
}
.rows > li:last-child { border-bottom: var(--pg-hairline) solid var(--pg-line-2); }
.rows > li::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--pg-grad-brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--pg-dur-3) var(--pg-ease-out);
}
.rows > li:hover::before { transform: scaleX(1); }
.rows .key {
  font-family: var(--pg-font-display);
  font-size: var(--pg-text-lg);
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: var(--pg-leading-tight);
  transition: color var(--pg-dur-2) ease;
}
.rows > li:hover .key { color: var(--pg-accent); }
.rows .key a { color: inherit; }
.rows p { color: var(--pg-fg-2); }
/* 特性列表：带编号的卡片网格，标题在上、说明在下 */
.rows-wide {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--pg-space-4);
  counter-reset: feat;
}
.rows-wide > li,
.rows-wide > li:last-child {
  display: flex;
  flex-direction: column;
  gap: var(--pg-space-2);
  padding: var(--pg-space-5);
  background: var(--pg-bg-card);
  border: var(--pg-hairline) solid var(--pg-line-glass);
  border-radius: var(--pg-radius-lg);
  box-shadow: inset 0 1px 0 var(--pg-line-hi);
  counter-increment: feat;
  transition: border-color var(--pg-dur-2) ease, translate var(--pg-dur-3) var(--pg-ease-out),
    box-shadow var(--pg-dur-2) ease;
}
.rows-wide > li:hover { border-color: var(--pg-line-strong); translate: 0 -0.1875rem; box-shadow: var(--pg-shadow); }
/* 编号：01、02……，等宽字体、品牌渐变 */
.rows-wide > li::before,
.rows-wide > li:hover::before {
  content: counter(feat, decimal-leading-zero);
  position: static;
  width: auto;
  height: auto;
  font-family: var(--pg-font-mono);
  font-size: var(--pg-text-xs);
  font-weight: 700;
  letter-spacing: var(--pg-tracking-label);
  line-height: 1;
  background: var(--pg-grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  transform: none;
}
.rows-wide .key { font-size: var(--pg-text-lg); }
.rows-wide p { font-size: var(--pg-text-sm); line-height: 1.8; }
.rows p + p { margin-top: var(--pg-space-2); }

/* ---------- 代码 ---------- */
code, kbd, pre {
  font-family: var(--pg-font-mono);
  font-size: 0.875em;
}
code {
  padding: 0.08em 0.38em;
  font-size: 0.84em;
  background: var(--pg-accent-soft);
  border: var(--pg-hairline) solid var(--pg-line-glass);
  border-radius: var(--pg-radius-sm);
  overflow-wrap: anywhere;
  /* 折行时每一段都保留完整的圆角和内边距 */
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
pre {
  position: relative;
  padding: var(--pg-space-5);
  line-height: 1.7;
  color: var(--pg-term-fg);
  background: var(--pg-term-bg);
  border: var(--pg-hairline) solid var(--pg-line-glass);
  border-radius: var(--pg-radius-lg);
  box-shadow: inset 0 1px 0 var(--pg-line-hi), var(--pg-shadow);
  overflow-x: auto;
}
pre code {
  padding: 0;
  color: inherit;
  background: none;
  border: 0;
  font-size: inherit;
  overflow-wrap: normal;
}
/* 终端：顶部窗口栏和三个圆点 */
pre.terminal {
  padding-top: calc(var(--pg-space-7) + var(--pg-space-1));
  border-radius: var(--pg-radius-lg);
}
pre.terminal::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2.25rem;
  background:
    radial-gradient(circle at 1.125rem 50%, var(--pg-term-red) 0.3125rem, transparent 0.34rem),
    radial-gradient(circle at 2.125rem 50%, var(--pg-term-yellow) 0.3125rem, transparent 0.34rem),
    radial-gradient(circle at 3.125rem 50%, var(--pg-term-green) 0.3125rem, transparent 0.34rem),
    var(--pg-term-bar);
  border-bottom: var(--pg-hairline) solid var(--pg-line-glass);
}
pre.terminal > code { display: block; }
pre.terminal .dim { color: var(--pg-term-dim); }
pre.terminal .prompt { color: var(--pg-term-accent); user-select: none; }
.term-caret {
  display: inline-block;
  width: 0.55em;
  height: 1.1em;
  margin-left: 0.15em;
  vertical-align: -0.2em;
  background: var(--pg-term-accent);
  animation: pg-blink 1.1s steps(1) infinite;
}
.copy-btn {
  position: absolute;
  top: var(--pg-space-3);
  right: var(--pg-space-3);
  padding: var(--pg-space-1) var(--pg-space-3);
  font: inherit;
  font-family: var(--pg-font-sans);
  font-size: var(--pg-text-xs);
  line-height: 1.4;
  color: var(--pg-term-fg);
  background: var(--pg-term-bar);
  border: var(--pg-hairline) solid var(--pg-line-strong);
  border-radius: var(--pg-radius-pill);
  cursor: pointer;
  transition: border-color var(--pg-dur-1) ease, transform var(--pg-dur-2) var(--pg-ease-spring);
}
.copy-btn:hover { border-color: var(--pg-term-accent); }
.copy-btn:active { transform: scale(0.94); }
.copy-btn.is-done { color: var(--pg-term-accent); border-color: var(--pg-term-accent); animation: pg-bump var(--pg-dur-3) var(--pg-ease-spring); }
pre:has(.copy-btn) { padding-right: var(--pg-space-9); }

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  padding: var(--pg-space-1) var(--pg-space-5);
  border-radius: var(--pg-radius-lg);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--pg-text-sm);
}
th, td {
  padding: var(--pg-space-3) var(--pg-space-4) var(--pg-space-3) 0;
  text-align: left;
  vertical-align: top;
  border-bottom: var(--pg-hairline) solid var(--pg-line-2);
}
tbody tr:last-child > * { border-bottom: 0; }
tbody tr { transition: background-color var(--pg-dur-1) ease; }
tbody tr:hover { background: var(--pg-accent-soft); }
thead th {
  white-space: nowrap;
  font-family: var(--pg-font-mono);
  font-size: var(--pg-text-2xs);
  font-weight: 600;
  letter-spacing: var(--pg-tracking-label);
  text-transform: uppercase;
  color: var(--pg-fg-3);
  border-bottom: var(--pg-hairline) solid var(--pg-line-strong);
}
tbody th { font-weight: 650; white-space: nowrap; }
td { color: var(--pg-fg-2); }
td.num { text-align: right; font-family: var(--pg-font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; color: var(--pg-fg-1); }

/* ---------- 提示块与徽标 ---------- */
.notice {
  display: flex;
  align-items: flex-start;
  gap: var(--pg-space-3);
  padding: var(--pg-space-4) var(--pg-space-5);
  border-radius: var(--pg-radius-lg);
}
.notice > div { min-width: 0; }
.notice > div > * + * { margin-top: var(--pg-space-2); }
.notice-icon { margin-top: 0.2em; color: var(--pg-accent); }
.notice-warn .notice-icon { color: var(--pg-warn-fg); }
.notice-title { font-weight: 700; }
.notice-info { background: var(--pg-accent-soft); border-color: var(--pg-line-glass); }
.notice-warn { background: var(--pg-warn-bg); border-color: var(--pg-warn-line); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--pg-space-1);
  padding: 0 var(--pg-space-3);
  font-family: var(--pg-font-sans);
  font-size: var(--pg-text-xs);
  font-weight: 600;
  line-height: 1.75;
  white-space: nowrap;
  color: var(--pg-mute-fg);
  background: var(--pg-mute-bg);
  border: var(--pg-hairline) solid var(--pg-mute-line);
  border-radius: var(--pg-radius-pill);
  vertical-align: middle;
}
.badge-ok { color: var(--pg-ok-fg); background: var(--pg-ok-bg); border-color: var(--pg-ok-line); }
.badge-warn { color: var(--pg-warn-fg); background: var(--pg-warn-bg); border-color: var(--pg-warn-line); }
.badge-bad { color: var(--pg-bad-fg); background: var(--pg-bad-bg); border-color: var(--pg-bad-line); }
/* 状态徽标前的呼吸圆点（只给没有图标的徽标） */
.badge:is(.badge-ok, .badge-warn):not(:has(.icon))::before {
  content: "";
  flex: none;
  width: 0.375rem;
  height: 0.375rem;
  background: currentColor;
  border-radius: 50%;
  box-shadow: 0 0 0 0 currentColor;
  animation: pg-ping 2.4s var(--pg-ease-out) infinite;
}

/* ---------- 按钮 ---------- */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--pg-space-3);
}
.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--pg-space-3) var(--pg-space-5);
  font-size: var(--pg-text-sm);
  font-weight: 650;
  line-height: var(--pg-leading-tight);
  text-decoration: none;
  color: var(--pg-on-ink);
  background: var(--pg-ink);
  border: var(--pg-hairline) solid var(--pg-ink);
  border-radius: var(--pg-radius-pill);
  box-shadow: var(--pg-shadow);
  transition: background-color var(--pg-dur-1) ease, border-color var(--pg-dur-2) ease,
    box-shadow var(--pg-dur-2) ease;
}
/* 悬停时一道斜光扫过 */
.button::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg, transparent 30%, var(--pg-shine) 50%, transparent 70%);
  transform: translateX(-110%);
  transition: transform var(--pg-dur-3) var(--pg-ease-out);
}
.button:hover::after { transform: translateX(110%); }
.button:hover { color: var(--pg-on-ink); background: var(--pg-ink-hover); border-color: var(--pg-ink-hover); box-shadow: var(--pg-glow); }
.button:active { box-shadow: var(--pg-shadow); }
.button-secondary {
  color: var(--pg-fg-1);
  background: var(--pg-bg-card);
  border-color: var(--pg-line-strong);
  box-shadow: none;
  -webkit-backdrop-filter: blur(var(--pg-blur));
  backdrop-filter: blur(var(--pg-blur));
}
.button-secondary:hover { color: var(--pg-fg-1); background: var(--pg-accent-soft); border-color: var(--pg-accent); }
.button .icon { margin-right: var(--pg-space-2); vertical-align: -0.2em; transition: transform var(--pg-dur-2) var(--pg-ease-spring); }
.button:hover .icon { transform: translateY(0.125rem); }

/* ---------- 图片 ---------- */
figure img {
  border: var(--pg-hairline) solid var(--pg-line-glass);
  border-radius: var(--pg-radius-lg);
  box-shadow: var(--pg-shadow-lg);
}
.img-frame { overflow: hidden; border-radius: var(--pg-radius-lg); }
figcaption {
  margin-top: var(--pg-space-3);
  font-size: var(--pg-text-sm);
  color: var(--pg-fg-3);
}

/* ---------- 版本历史（ota/releases.html 的脚本使用） ---------- */
.release-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--pg-space-2) var(--pg-space-4);
  margin-bottom: var(--pg-space-5);
}
.release-tools button[aria-pressed] {
  padding: var(--pg-space-1) var(--pg-space-4);
  font: inherit;
  font-size: var(--pg-text-sm);
  color: var(--pg-fg-2);
  background: var(--pg-bg-card);
  border: var(--pg-hairline) solid var(--pg-line-strong);
  border-radius: var(--pg-radius-pill);
  cursor: pointer;
  transition: color var(--pg-dur-1) ease, background-color var(--pg-dur-2) ease, border-color var(--pg-dur-2) ease;
}
.release-tools button[aria-pressed]:hover { color: var(--pg-fg-1); border-color: var(--pg-accent); }
.release-tools button[aria-pressed="true"] {
  color: var(--pg-on-ink);
  background: var(--pg-ink);
  border-color: var(--pg-ink);
}
.release-tools input {
  min-width: 14rem;
  padding: var(--pg-space-2) var(--pg-space-4);
  font: inherit;
  font-size: var(--pg-text-sm);
  color: var(--pg-fg-1);
  background: var(--pg-bg-card);
  border: var(--pg-hairline) solid var(--pg-line-strong);
  border-radius: var(--pg-radius-pill);
  transition: border-color var(--pg-dur-1) ease, box-shadow var(--pg-dur-2) ease;
}
.release-tools input:focus { outline: none; border-color: var(--pg-accent); box-shadow: var(--pg-glow); }
.release-count { margin-bottom: var(--pg-space-4); font-size: var(--pg-text-sm); color: var(--pg-fg-3); }
.release {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: var(--pg-space-5);
  padding: var(--pg-space-6);
  border-radius: var(--pg-radius-xl);
}
.release + .release { margin-top: var(--pg-space-4); }
.release h3 { font-size: var(--pg-text-xl); }
.release-meta { margin-top: var(--pg-space-1); font-family: var(--pg-font-mono); font-size: var(--pg-text-xs); color: var(--pg-fg-3); }
.release > div > * + * { margin-top: var(--pg-space-3); }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  padding-block: var(--pg-space-8) var(--pg-space-5);
  background: var(--pg-bg-sunken);
  font-size: var(--pg-text-sm);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--pg-grad-line);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(4, minmax(0, 1fr));
  gap: var(--pg-space-6);
}
.footer-about p { margin-top: var(--pg-space-3); max-width: 22rem; color: var(--pg-fg-3); }
.footer-title {
  margin: 0 0 var(--pg-space-3);
  font-family: var(--pg-font-mono);
  font-size: var(--pg-text-2xs);
  font-weight: 600;
  letter-spacing: var(--pg-tracking-label);
  text-transform: uppercase;
  line-height: var(--pg-leading-tight);
  color: var(--pg-fg-3);
}
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li + li { margin-top: var(--pg-space-2); }
.site-footer a { color: var(--pg-fg-2); text-decoration: none; }
.site-footer a:hover { color: var(--pg-fg-1); }
.site-footer nav a {
  background: linear-gradient(currentColor, currentColor) left bottom / 0 1px no-repeat;
  transition: color var(--pg-dur-1) ease, background-size var(--pg-dur-2) var(--pg-ease-out);
}
.site-footer nav a:hover { background-size: 100% 1px; }
.footer-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--pg-space-2) var(--pg-space-5);
  margin-top: var(--pg-space-7);
  padding-top: var(--pg-space-4);
  border-top: var(--pg-hairline) solid var(--pg-line-2);
  font-size: var(--pg-text-xs);
  color: var(--pg-fg-3);
}
.footer-base p { margin: 0; }
/* 页脚底部的超大字标，由脚本插入，aria-hidden，纯装饰 */
.footer-mark {
  margin-top: var(--pg-space-6);
  font-family: var(--pg-font-display);
  font-size: clamp(3.5rem, 15vw, 13rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.8;
  text-align: center;
  white-space: nowrap;
  user-select: none;
  pointer-events: none;
  background: var(--pg-grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  -webkit-mask-image: linear-gradient(180deg, black 10%, transparent 95%);
  mask-image: linear-gradient(180deg, black 10%, transparent 95%);
}

/* ---------- 图标 ---------- */
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon {
  width: 1.25em;
  height: 1.25em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -0.25em;
}
.icon-box {
  position: relative;
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 3rem;
  height: 3rem;
  color: var(--pg-fg-1);
  background: var(--pg-bg-raised);
  border: var(--pg-hairline) solid var(--pg-line-glass);
  border-radius: var(--pg-radius);
  box-shadow: inset 0 1px 0 var(--pg-line-hi), var(--pg-shadow);
}
/* 图标框外圈一层渐变描边 */
.icon-box::before {
  content: "";
  position: absolute;
  inset: calc(var(--pg-hairline) * -1);
  padding: var(--pg-hairline);
  border-radius: inherit;
  background: linear-gradient(140deg, var(--pg-brand), transparent 45%, transparent 60%, var(--pg-brand-2));
  -webkit-mask: linear-gradient(black 0 0) content-box, linear-gradient(black 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(black 0 0) content-box exclude, linear-gradient(black 0 0);
  pointer-events: none;
}
.icon-box .icon { width: 1.5rem; height: 1.5rem; vertical-align: 0; transition: transform var(--pg-dur-3) var(--pg-ease-spring); }
.tile:hover .icon-box .icon,
.points > li:hover .icon-box .icon,
.flow > li:hover .icon-box .icon { transform: scale(1.14) rotate(-6deg); }
.button .icon { margin-right: var(--pg-space-2); }
.badge .icon { width: 1em; height: 1em; vertical-align: -0.15em; }
.tile-icon { margin-bottom: var(--pg-space-3); }
.split-head { display: flex; flex-direction: column; gap: var(--pg-space-3); align-items: flex-start; }
.icon-line { display: flex; align-items: baseline; gap: var(--pg-space-3); }
.icon-line .icon { position: relative; top: 0.25em; color: var(--pg-accent); }

/* ---------- 要点条：每页顶部的四件事 ---------- */
.points {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--pg-space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}
.points > li { display: flex; flex-direction: column; gap: var(--pg-space-2); margin: 0; }
.points .icon-box { margin-bottom: var(--pg-space-2); color: var(--pg-accent); }
.points + .notice { margin-top: var(--pg-space-7); }
.points strong {
  font-family: var(--pg-font-display);
  font-size: var(--pg-text-lg);
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: var(--pg-leading-tight);
}
.points p { font-size: var(--pg-text-sm); color: var(--pg-fg-2); }

/* ---------- 流程图 ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr));
  gap: var(--pg-space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}
.flow-4 { --cols: 4; }
.flow-5 { --cols: 5; }
.flow > li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--pg-space-2);
  min-width: 0;
  margin: 0;
  padding: var(--pg-space-5);
  border-radius: var(--pg-radius-lg);
  transition: border-color var(--pg-dur-2) ease, translate var(--pg-dur-3) var(--pg-ease-out);
}
.flow > li:hover { border-color: var(--pg-line-strong); translate: 0 -0.25rem; }
/* 卡片之间的箭头：挂在 .flow-top 上，好让卡片本身的 ::before/::after 留给鼠标高光 */
.flow > li + li > .flow-top::before {
  content: "";
  position: absolute;
  top: 50%;
  left: -1.05rem;
  width: 0.6rem;
  height: 0.6rem;
  margin-top: -0.3rem;
  border-top: var(--pg-stroke) solid var(--pg-brand);
  border-right: var(--pg-stroke) solid var(--pg-brand);
  transform: rotate(45deg);
}
.flow-top { display: flex; align-items: center; justify-content: space-between; }
.flow-n {
  font-family: var(--pg-font-mono);
  font-size: var(--pg-text-xl);
  font-weight: 700;
  background: var(--pg-grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}
.flow-title { font-weight: 700; line-height: var(--pg-leading-tight); }
.flow p { font-size: var(--pg-text-sm); color: var(--pg-fg-2); }
.flow p.flow-title { color: var(--pg-fg-1); }
.flow code { font-size: var(--pg-text-xs); }
.flow > li > a { margin-top: auto; padding-top: var(--pg-space-2); font-size: var(--pg-text-sm); font-weight: 600; }
.flow > li > code { margin-top: auto; }

/* ---------- 分层图 ---------- */
.layers {
  display: grid;
  gap: var(--pg-space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.layers > li {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--pg-space-1) var(--pg-space-4);
  margin: 0;
  padding: var(--pg-space-3) var(--pg-space-5);
  overflow: hidden;
  background: var(--pg-bg-card);
  border: var(--pg-hairline) solid var(--pg-line-glass);
  border-radius: var(--pg-radius);
  transition: translate var(--pg-dur-3) var(--pg-ease-out), border-color var(--pg-dur-2) ease;
}
.layers > li::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0.1875rem;
  background: var(--layer, var(--pg-line-strong));
}
.layers > li:hover { translate: 0.375rem 0; border-color: var(--pg-line-strong); }
.layers strong { font-weight: 700; }
.layers span { font-size: var(--pg-text-sm); color: var(--pg-fg-2); }
.layers .layer-user { --layer: var(--pg-ref-cyan); background: var(--pg-tile-sky); }
.layers .layer-compat { --layer: var(--pg-ref-emerald); background: var(--pg-tile-sage); }
.layers .layer-lib { --layer: var(--pg-ref-emerald); background: var(--pg-tile-sage); }
.layers .layer-kernel { --layer: var(--pg-ref-violet); background: var(--pg-tile-clay); }
.layers .layer-boot { --layer: var(--pg-ref-pink); }
.layers .layer-abi {
  background: transparent;
  border: var(--pg-stroke) dashed var(--pg-line-strong);
}
.layers .layer-abi::before { display: none; }

/* ---------- 条形图：表格里的数量对比 ---------- */
.bar {
  display: block;
  width: 7rem;
  height: 0.375rem;
  margin: 0 0 var(--pg-space-1);
  overflow: hidden;
  background: var(--pg-line-2);
  border-radius: var(--pg-radius-pill);
}
.num .bar { margin-left: auto; }
.bar > i {
  display: block;
  width: var(--w);
  height: 100%;
  background: var(--pg-grad-brand);
  border-radius: inherit;
  transform-origin: left center;
}

/* ---------- 插画 ---------- */
.art { display: block; width: 100%; max-width: 30rem; height: auto; margin-inline: auto; overflow: visible; }
.art text { font-family: var(--pg-font-sans); fill: var(--pg-fg-1); }
.art .art-sub { fill: var(--pg-fg-2); }
.art .art-note { fill: var(--pg-fg-3); }
.art rect { stroke: var(--pg-line-glass); stroke-width: 1; }
.art-l1 { fill: var(--pg-tile-sky); }
.art-l2 { fill: var(--pg-tile-clay); }
.art-l3 { fill: var(--pg-tile-sage); }
.art rect.art-l2 { stroke: var(--pg-brand); stroke-width: 1.5; }
.art-slot { fill: var(--pg-bg-raised); stroke: var(--pg-line-strong); stroke-width: 2; }
.art rect.art-slot { stroke: var(--pg-line-strong); stroke-width: 2; }
.art rect.art-slot-on { fill: var(--pg-tile-clay); stroke: var(--pg-brand); stroke-width: 2; }
.art-line { fill: none; stroke: var(--pg-fg-3); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.art-brand { fill: none; stroke: var(--pg-brand-2); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.art-ico { fill: none; stroke: var(--pg-accent); stroke-width: 1.1; stroke-linecap: round; stroke-linejoin: round; }
.stack .art { max-width: 34rem; margin-inline: 0; }
.hero-art-svg { position: relative; min-width: 0; }
.hero-art-svg figcaption { max-width: 30rem; margin-inline: auto; }

/* ---------- 关键帧 ---------- */
@keyframes pg-aurora {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(6deg) scale(1.08); }
  100% { transform: rotate(-4deg) scale(1.02); }
}
@keyframes pg-pop {
  from { opacity: 0; transform: translateX(-50%) translateY(-0.375rem) scale(0.97); }
  to { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
}
@keyframes pg-spin-in {
  from { opacity: 0; transform: rotate(-90deg) scale(0.5); }
  to { opacity: 1; transform: rotate(0deg) scale(1); }
}
@keyframes pg-ping {
  0% { box-shadow: 0 0 0 0 currentColor; }
  70%, 100% { box-shadow: 0 0 0 0.375rem transparent; }
}
@keyframes pg-blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}
@keyframes pg-bump {
  0% { transform: scale(1); }
  40% { transform: scale(1.12); }
  100% { transform: scale(1); }
}
@keyframes pg-vt-out {
  to { opacity: 0; transform: translateY(-0.75rem) scale(0.985); }
}
@keyframes pg-vt-in {
  from { opacity: 0; transform: translateY(1.25rem) scale(1.01); }
}

/* ---------- 跨页面转场（Chrome / Edge / Safari 18.2+；其他浏览器照常跳转） ---------- */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: var(--pg-dur-2) var(--pg-ease-in-out) both pg-vt-out; }
::view-transition-new(root) { animation: var(--pg-dur-3) var(--pg-ease-out) both pg-vt-in; }
/* 切换主题时由脚本用圆形展开动画，替换掉默认的淡入淡出 */
html.vt-theme .site-header { view-transition-name: none; }
html.vt-theme::view-transition-old(root),
html.vt-theme::view-transition-new(root) { animation: none; mix-blend-mode: normal; }

/* ---------- 窄屏 ---------- */
@media (max-width: 62rem) {
  .tiles { grid-template-columns: minmax(0, 1fr); }
  .points { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow-4, .flow-5 { --cols: 2; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-about { grid-column: 1 / -1; }
}

@media (max-width: 56rem) {
  .container { padding-inline: var(--pg-space-4); }
  .hero { padding-block: var(--pg-space-8) var(--pg-space-7); }
  .hero-split, .split, .release { grid-template-columns: minmax(0, 1fr); gap: var(--pg-space-5); }
  .split > h2, .split > .split-head { position: static; }
  .rows-wide { grid-template-columns: minmax(0, 1fr); gap: var(--pg-space-3); }
  .rows-wide > li, .rows-wide > li:last-child { padding: var(--pg-space-4) var(--pg-space-5); }
  .lede { font-size: 1.0625rem; }
  .section { padding-block: var(--pg-space-8); }
  .rows > li, .rows-wide > li { grid-template-columns: minmax(0, 1fr); gap: var(--pg-space-1); }
  .points { grid-template-columns: minmax(0, 1fr); }
  .flow, .flow-4, .flow-5 { --cols: 1; gap: var(--pg-space-6); }
  .flow > li + li > .flow-top::before {
    top: -1.05rem;
    left: 50%;
    margin: 0 0 0 -0.3rem;
    transform: rotate(135deg);
  }
  .hero-art-svg { max-width: 24rem; }
  .release { padding: var(--pg-space-5); }

  /* 没有脚本时，导航直接在页眉里折行，仍然可用。 */
  .header-inner { flex-wrap: wrap; padding-block: var(--pg-space-2); }
  .site-nav { order: 3; width: 100%; margin-left: 0; }
  .header-actions { margin-left: auto; }

  /* 有脚本时收进菜单，由页眉按钮展开。 */
  html.js .nav-toggle { display: inline-flex; }
  html.js .site-nav { display: none; }
  html.js .site-nav.open { display: block; }
  html.js .site-nav > ul { flex-direction: column; align-items: stretch; padding-bottom: var(--pg-space-3); }
  html.js .menu > ul {
    position: static;
    min-width: 0;
    box-shadow: none;
    border: 0;
    background: transparent;
    padding-block: 0;
    transform: none;
    animation: none;
  }
  .site-nav > ul > li > a[aria-current="page"]::after,
  .site-nav .menu.is-current > summary::after { left: var(--pg-space-3); margin-left: 0; }
}


/* ---------- 长内容：折叠按钮、横滑卡片、本页目录 ---------- */
/* 折叠：表格只露前 4 行、特性卡片在电脑上只露前 4 张，底部渐隐提示下面还有 */
table.is-collapsed tbody > tr:nth-child(n+5) { display: none; }
.rows-wide.is-collapsed > li:nth-child(n+5) { display: none; }
.table-wrap:has(table.is-collapsed),
.rows-wide.is-collapsed {
  -webkit-mask-image: linear-gradient(180deg, black 65%, transparent);
  mask-image: linear-gradient(180deg, black 65%, transparent);
}
.fold-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--pg-space-2);
  width: 100%;
  margin-top: var(--pg-space-3);
  padding: var(--pg-space-3) var(--pg-space-4);
  font: inherit;
  font-size: var(--pg-text-sm);
  font-weight: 600;
  color: var(--pg-fg-1);
  background: var(--pg-bg-card);
  border: var(--pg-hairline) dashed var(--pg-line-strong);
  border-radius: var(--pg-radius-lg);
  cursor: pointer;
  transition: border-color var(--pg-dur-2) ease, background-color var(--pg-dur-2) ease;
}
.fold-btn:hover { border-color: var(--pg-accent); border-style: solid; background: var(--pg-accent-soft); }
.fold-btn .icon { transition: transform var(--pg-dur-2) var(--pg-ease-spring); }
.fold-btn[aria-expanded="true"] .icon { transform: rotate(180deg); }
.swipe-meta { display: none; }
/* 列表直接放在两栏 .split 里时，按钮跟着列表待在右栏，并收紧和列表之间的行距 */
@media (min-width: 56.01rem) {
  .split > .fold-btn { grid-column: 2; margin-top: calc(var(--pg-space-7) * -1 + var(--pg-space-3)); }
}

/* 本页目录：首屏下方吸顶；页眉收起时贴到最顶上 */
.page-toc {
  position: sticky;
  top: var(--pg-header-h);
  z-index: 40;
  background: var(--pg-bg-glass);
  border-block: var(--pg-hairline) solid var(--pg-line-glass);
  -webkit-backdrop-filter: saturate(1.6) blur(var(--pg-blur));
  backdrop-filter: saturate(1.6) blur(var(--pg-blur));
  transition: top var(--pg-dur-3) var(--pg-ease-out);
}
.site-header.is-hidden ~ main .page-toc { top: 0; }
html.has-toc { scroll-padding-top: calc(var(--pg-header-h) + 3.5rem); }
.page-toc ul {
  display: flex;
  gap: var(--pg-space-1);
  max-width: var(--pg-container);
  margin: 0 auto;
  padding: var(--pg-space-2) var(--pg-space-5);
  overflow-x: auto;
  list-style: none;
  scrollbar-width: none;
}
.page-toc ul::-webkit-scrollbar { display: none; }
.page-toc li { flex: none; margin: 0; }
.page-toc a {
  display: block;
  padding: var(--pg-space-1) var(--pg-space-3);
  font-size: var(--pg-text-xs);
  font-weight: 500;
  white-space: nowrap;
  color: var(--pg-fg-2);
  text-decoration: none;
  border: var(--pg-hairline) solid transparent;
  border-radius: var(--pg-radius-pill);
  transition: color var(--pg-dur-1) ease, background-color var(--pg-dur-2) ease, border-color var(--pg-dur-2) ease;
}
.page-toc a:hover { color: var(--pg-fg-1); background: var(--pg-accent-soft); }
.page-toc a[aria-current] {
  color: var(--pg-fg-1);
  font-weight: 650;
  background: var(--pg-accent-soft);
  border-color: var(--pg-line-strong);
}
.page-toc + .section::before { display: none; }

/* 手机：特性卡片改成横向滑动，露出下一张的边缘提示还能滑 */
@media (max-width: 48rem) {
  .rows-wide,
  .rows-wide.is-collapsed {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: 84%;
    margin-inline: calc(var(--pg-space-4) * -1);
    padding: 0 var(--pg-space-4) var(--pg-space-1);
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: var(--pg-space-4);
    scrollbar-width: none;
    -webkit-mask-image: none;
    mask-image: none;
  }
  .rows-wide::-webkit-scrollbar { display: none; }
  .rows-wide > li { scroll-snap-align: start; align-self: start; }
  .split > .swipe-meta { margin-top: calc(var(--pg-space-5) * -1 + var(--pg-space-3)); }
  .rows-wide.is-collapsed > li:nth-child(n+5) { display: flex; }
  .fold-btn.fold-cards { display: none; }
  .swipe-meta {
    display: flex;
    align-items: center;
    gap: var(--pg-space-3);
    margin-top: var(--pg-space-3);
    font-family: var(--pg-font-mono);
    font-size: var(--pg-text-2xs);
    color: var(--pg-fg-3);
  }
  .swipe-meta[hidden] { display: none; }
  .swipe-track {
    position: relative;
    flex: 1;
    height: 0.1875rem;
    overflow: hidden;
    background: var(--pg-line-2);
    border-radius: var(--pg-radius-pill);
  }
  .swipe-track i {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    background: var(--pg-grad-brand);
    border-radius: inherit;
  }
  .page-toc ul { padding-inline: var(--pg-space-4); }
  /* 窄屏代码块：复制按钮放到代码上方一条，不再压住长命令 */
  pre:has(.copy-btn) { padding-top: calc(var(--pg-space-7) + var(--pg-space-1)); padding-right: var(--pg-space-5); }
}

/* 手机上表格改成一行一张卡片：行标题在上，每个值前面补上列名（由 main.js 写进 data-label）。
   这些表每一行彼此独立，不需要跨行横向比较，所以堆叠比横向滚动更好读。 */
@media (max-width: 48rem) {
  .table-wrap {
    padding: 0;
    overflow: visible;
    background: none;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }
  .table-wrap :is(table, tbody, tr, th, td) { display: block; width: auto; }
  .table-wrap thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }
  .table-wrap tr {
    padding: var(--pg-space-4) var(--pg-space-5);
    background: var(--pg-bg-card);
    border: var(--pg-hairline) solid var(--pg-line-glass);
    border-radius: var(--pg-radius-lg);
    box-shadow: inset 0 1px 0 var(--pg-line-hi);
  }
  .table-wrap tr + tr { margin-top: var(--pg-space-3); }
  .table-wrap tbody tr:hover { background: var(--pg-bg-card); }
  .table-wrap :is(th, td),
  .table-wrap tbody tr:last-child > * { padding: 0; border: 0; text-align: left; white-space: normal; }
  .table-wrap tbody th { font-size: var(--pg-text-md); line-height: var(--pg-leading-tight); }
  .table-wrap tbody th + td,
  .table-wrap td + td { margin-top: var(--pg-space-2); }
  .table-wrap td:empty { display: none; }
  .table-wrap td[data-label]::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 0.125rem;
    font-family: var(--pg-font-mono);
    font-size: var(--pg-text-2xs);
    font-weight: 600;
    letter-spacing: var(--pg-tracking-label);
    text-transform: uppercase;
    color: var(--pg-fg-3);
  }
  .table-wrap .badge { white-space: normal; }
  /* 只有一个状态徽标的格子不再单占一行：挪到卡片标题右边，也不再显示列名 */
  .table-wrap tbody tr:has(> th) {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: var(--pg-space-3);
    align-items: start;
  }
  .table-wrap tbody tr:has(> th) > * { grid-column: 1 / -1; }
  .table-wrap tbody tr:has(> th) > th { grid-column: 1; grid-row: 1; }
  .table-wrap tbody tr > td:has(> .badge:only-child) {
    grid-column: 2;
    grid-row: 1;
    margin-top: 0;
  }
  .table-wrap td:has(> .badge:only-child)::before { display: none; }
  /* 最低 / 推荐对照表：卡片里两栏并排，一眼对比 */
  .table-wrap table[data-keep-labels] tbody tr { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .table-wrap table[data-keep-labels] tbody tr > th { grid-column: 1 / -1; }
  .table-wrap table[data-keep-labels] tbody tr > td { grid-column: auto; grid-row: 2; margin-top: var(--pg-space-2); }
  /* 数字列（行数等）同样放到标题右边，条形图缩短后跟在数字上方 */
  .table-wrap tbody tr > td.num {
    grid-column: 2;
    grid-row: 1;
    margin-top: 0;
    text-align: right;
  }
  .table-wrap td.num::before { display: none; }
  .table-wrap td.num .bar { width: 4.5rem; margin-left: auto; }
  .table-wrap tbody tr > th + td + td.num,
  .table-wrap tbody tr > th + td:has(+ td.num) { margin-top: var(--pg-space-2); }
  .table-wrap tbody tr > th + td:has(> .badge:only-child) + td { margin-top: var(--pg-space-2); }
  .table-wrap td.num { text-align: left; }
}

/* ---------- 文档式正文（介绍页）：排版像渲染后的 Markdown ----------
   左边吸顶目录，右边单栏文章。只用标题、段落、列表、表格和提示块，不用卡片网格。 */
.doc-section { padding-block: var(--pg-space-8) var(--pg-space-9); }
.doc {
  display: grid;
  grid-template-columns: 12.5rem minmax(0, 46rem);
  gap: var(--pg-space-8);
  justify-content: center;
  align-items: start;
}
.doc-toc-title { display: none; }

.prose {
  min-width: 0;
  font-size: 1.03125rem;
  line-height: 1.85;
  color: var(--pg-fg-2);
}
.prose > * + * { margin-top: var(--pg-space-4); }
.prose > :first-child { margin-top: 0; }
.prose h2 {
  margin-top: var(--pg-space-8);
  padding-bottom: var(--pg-space-3);
  font-size: var(--pg-text-xl);
  line-height: var(--pg-leading-tight);
  letter-spacing: -0.02em;
  border-bottom: var(--pg-hairline) solid var(--pg-line-2);
}
.prose h3 {
  margin-top: var(--pg-space-6);
  font-size: var(--pg-text-lg);
  letter-spacing: -0.01em;
}
/* 标题前的 # / ## 只是装饰，读屏时忽略（content 的 / "" 是替代文本） */
.prose h2::before,
.prose h3::before {
  content: "#";
  content: "#" / "";
  margin-right: 0.45em;
  font-family: var(--pg-font-mono);
  font-weight: 500;
  color: var(--pg-brand);
}
.prose h3::before { content: "##"; content: "##" / ""; color: var(--pg-fg-3); }
.prose h2 + *,
.prose h3 + * { margin-top: var(--pg-space-3); }
.prose strong { font-weight: 650; color: var(--pg-fg-1); }
.prose a { text-decoration-color: var(--pg-line-strong); }
.prose a:hover { text-decoration-color: currentColor; }

.prose ul,
.prose ol { padding-left: 1.5rem; list-style: none; }
.prose li { position: relative; }
.prose li + li { margin-top: var(--pg-space-2); }
.prose ul > li::before {
  content: "-";
  content: "-" / "";
  position: absolute;
  left: -1.25rem;
  font-family: var(--pg-font-mono);
  font-weight: 700;
  color: var(--pg-brand);
}
.prose ol { counter-reset: md; }
.prose ol > li { counter-increment: md; }
.prose ol > li::before {
  content: counter(md) ".";
  position: absolute;
  left: -1.5rem;
  font-family: var(--pg-font-mono);
  font-size: var(--pg-text-sm);
  font-weight: 700;
  color: var(--pg-brand);
}

/* 提示块：GitHub 风格，左侧一条色条 */
.prose .notice {
  padding: var(--pg-space-3) var(--pg-space-4);
  background: var(--pg-accent-soft);
  border: 0;
  border-left: 0.25rem solid var(--pg-brand);
  border-radius: var(--pg-radius);
  box-shadow: none;
}
.prose .notice-warn { background: var(--pg-warn-bg); border-left-color: var(--pg-warn-fg); }
.prose .notice p { font-size: var(--pg-text-sm); }

/* 表格：Markdown 表格的样子，带边框和隔行底色（手机上仍是堆叠卡片） */
@media (min-width: 48.01rem) {
  .prose .table-wrap {
    padding: 0;
    background: none;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }
  .prose table { font-size: var(--pg-text-sm); }
  .prose :is(th, td),
  .prose tbody tr:last-child > * {
    padding: var(--pg-space-2) var(--pg-space-4);
    border: var(--pg-hairline) solid var(--pg-line-2);
  }
  .prose thead th { color: var(--pg-fg-1); background: var(--pg-bg-sunken); }
  .prose tbody tr:nth-child(even) { background: var(--pg-bg-sunken); }
  .prose tbody tr:hover { background: var(--pg-accent-soft); }
}

/* 电脑：目录是左侧的竖排列表，当前小节左边亮一条品牌色 */
@media (min-width: 62.01rem) {
  .doc > .doc-toc {
    position: sticky;
    top: calc(var(--pg-header-h) + var(--pg-space-5));
    background: none;
    border: 0;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  .site-header.is-hidden ~ main .doc > .doc-toc { top: var(--pg-space-5); }
  .doc-toc-title {
    display: block;
    margin-bottom: var(--pg-space-3);
    font-family: var(--pg-font-mono);
    font-size: var(--pg-text-2xs);
    letter-spacing: var(--pg-tracking-label);
    text-transform: uppercase;
    color: var(--pg-fg-3);
  }
  .doc-toc ul {
    flex-direction: column;
    gap: 0;
    padding: 0;
    overflow: visible;
    border-left: var(--pg-hairline) solid var(--pg-line-2);
  }
  .doc-toc a,
  .doc-toc a:hover,
  .doc-toc a[aria-current] {
    margin-left: -1px;
    padding: 0.375rem 0 0.375rem var(--pg-space-4);
    font-size: var(--pg-text-sm);
    white-space: normal;
    background: none;
    border: 0;
    border-left: var(--pg-stroke) solid transparent;
    border-radius: 0;
  }
  .doc-toc a:hover { color: var(--pg-fg-1); border-left-color: var(--pg-line-strong); }
  .doc-toc a[aria-current] { color: var(--pg-fg-1); border-left-color: var(--pg-brand); }
}
/* 平板和手机：单栏，目录变成顶部横向的目录条 */
@media (max-width: 62rem) {
  .doc { grid-template-columns: minmax(0, 1fr); gap: var(--pg-space-6); }
  .doc > .doc-toc { margin-inline: calc(var(--pg-space-5) * -1); }
}
@media (max-width: 56rem) {
  .doc > .doc-toc { margin-inline: calc(var(--pg-space-4) * -1); }
  .doc-section { padding-block: var(--pg-space-6) var(--pg-space-8); }
  .prose { font-size: var(--pg-text-md); }
  .prose h2 { margin-top: var(--pg-space-7); }
}

/* 用户要求减少动态效果时，关掉所有装饰性动画与过渡 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .hero::before { animation: none; translate: none; }
  @view-transition { navigation: none; }
}

@media print {
  .site-header, .copy-btn, .skip-link, .site-footer, .scroll-progress { display: none; }
  body::after, .hero::before, .hero::after { display: none; }
  .section { padding-block: var(--pg-space-5); }
}