/* ============================================================
   PG娱乐中心 · /assets/site.css
   共享外壳：reset / 变量 / 头部 / 右侧导轨 / 页脚 / 通用组件
   视觉基调：深空黑底色 + 霓虹紫识别 + 电光蓝·荧光青交互 + 暖金关键动作
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html, body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; }

:root {
  color-scheme: dark;

  --pg-ink: #07060B;
  --pg-ink-2: #101528;
  --pg-violet: #8A3BFF;
  --pg-violet-deep: #5A2BC4;
  --pg-blue: #2F7BFF;
  --pg-cyan: #25F5D0;
  --pg-gold: #FFC24B;
  --pg-paper: #F2F3F7;
  --pg-muted: #9AA3B8;
  --pg-line: #1E2438;

  --pg-font-head: "Helvetica Neue", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --pg-font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --pg-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --pg-shell-w: 1240px;
  --pg-gutter: clamp(16px, 4vw, 44px);
  --pg-header-h: clamp(82px, 9vw, 94px);
  --pg-rail-space: 0px;

  --pg-radius-l: 26px;
  --pg-radius-m: 18px;
  --pg-radius-s: 12px;

  --pg-shadow: 0 18px 48px rgba(6, 4, 16, .55);
  --pg-ease: cubic-bezier(.2, .7, .2, 1);
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--pg-header-h) + 16px);
}

body {
  min-height: 100%;
  padding-top: var(--pg-header-h);
  background-color: var(--pg-ink);
  color: var(--pg-paper);
  font-family: var(--pg-font-body);
  font-size: 16px;
  line-height: 1.85;
  font-weight: 400;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 背景三层：氛围光 / 扫描线 / 底色 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(920px 620px at 10% -10%, rgba(138, 59, 255, .30), transparent 62%),
    radial-gradient(760px 520px at 96% 4%, rgba(47, 123, 255, .20), transparent 60%),
    radial-gradient(720px 660px at 76% 98%, rgba(37, 245, 208, .10), transparent 66%),
    var(--pg-ink);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .55;
  background-image: repeating-linear-gradient(180deg, rgba(242, 243, 247, .05) 0 1px, transparent 1px 4px);
}

::selection { background: rgba(37, 245, 208, .28); color: var(--pg-paper); }

h1, h2, h3, h4 {
  font-family: var(--pg-font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.15;
}
h1 { font-size: clamp(34px, 5.2vw, 58px); }
h2 { font-size: clamp(26px, 3.2vw, 38px); }
h3 { font-size: 20px; letter-spacing: -.01em; }

p { line-height: 1.85; }

a { color: var(--pg-blue); text-decoration: none; }
a:hover { color: var(--pg-cyan); }

:focus-visible {
  outline: 2px solid var(--pg-cyan);
  outline-offset: 3px;
  border-radius: 8px;
}

.pg-num, .pg-card__meta, .pg-crumb__list, .pg-tag, .pg-step__num, .pg-stat__value, .pg-footer__legal, .pg-toc__title {
  font-family: var(--pg-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

/* ---------- 布局 ---------- */
.pg-shell {
  width: min(var(--pg-shell-w), calc(100% - var(--pg-gutter) * 2));
  margin-inline: auto;
}

.pg-main {
  padding-top: clamp(18px, 3vw, 40px);
  padding-bottom: clamp(48px, 7vw, 120px);
  padding-right: var(--pg-rail-space);
}

.pg-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.pg-span-3 { grid-column: span 3; }
.pg-span-4 { grid-column: span 4; }
.pg-span-5 { grid-column: span 5; }
.pg-span-6 { grid-column: span 6; }
.pg-span-7 { grid-column: span 7; }
.pg-span-12 { grid-column: span 12; }

.pg-section { margin-bottom: clamp(48px, 7vw, 96px); }

.pg-prose { max-width: 38em; }
.pg-prose p + p { margin-top: 1em; }

.pg-hairline {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(138, 59, 255, .75), rgba(37, 245, 208, .6), transparent);
}

/* ---------- 跳到正文 ---------- */
.pg-skip {
  position: fixed;
  top: -90px;
  left: 14px;
  z-index: 95;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--pg-cyan);
  color: #04120E;
  font-weight: 800;
  font-size: 15px;
  transition: top .18s var(--pg-ease);
}
.pg-skip:focus { top: 14px; color: #04120E; }

/* ---------- 滚动进度 ---------- */
.pg-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 85;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--pg-violet), var(--pg-cyan) 55%, var(--pg-gold));
  box-shadow: 0 0 14px rgba(37, 245, 208, .55);
}

/* ---------- 头部：悬浮胶囊浮岛 ---------- */
.pg-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 70;
  padding: 14px var(--pg-gutter) 0;
  pointer-events: none;
}
.pg-header__inner {
  position: relative;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  width: min(var(--pg-shell-w), 100%);
  margin-inline: auto;
  padding: 9px clamp(12px, 1.6vw, 20px);
  border: 1px solid rgba(30, 36, 56, .95);
  border-radius: 999px;
  background: linear-gradient(120deg, rgba(16, 21, 40, .94), rgba(7, 6, 11, .88));
  box-shadow: var(--pg-shadow), inset 0 1px 0 rgba(242, 243, 247, .06);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  transition: padding .2s var(--pg-ease), width .2s var(--pg-ease), box-shadow .2s var(--pg-ease), border-color .2s var(--pg-ease);
}
.pg-header[data-scrolled="true"] .pg-header__inner {
  width: min(1080px, 100%);
  padding-block: 6px;
  border-color: rgba(138, 59, 255, .45);
  box-shadow: 0 12px 34px rgba(6, 4, 16, .62);
}

.pg-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 0 0 auto;
  color: var(--pg-paper);
}
.pg-brand:hover { color: var(--pg-paper); }
.pg-brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 14px;
  font-family: var(--pg-font-head);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: .04em;
  color: #0A0714;
  background: linear-gradient(140deg, var(--pg-cyan), var(--pg-violet) 72%);
  box-shadow: 0 0 0 1px rgba(37, 245, 208, .35), 0 10px 24px rgba(138, 59, 255, .35);
}
.pg-brand__text { display: flex; flex-direction: column; min-width: 0; }
.pg-brand__name {
  font-family: var(--pg-font-head);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: -.01em;
  white-space: nowrap;
}
.pg-brand__tagline {
  font-size: 12px;
  line-height: 1.45;
  color: var(--pg-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pg-header[data-scrolled="true"] .pg-brand__tagline { display: none; }

.pg-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
  min-width: 0;
}
.pg-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 2px;
}
.pg-nav__list::-webkit-scrollbar { display: none; }
.pg-nav__item { list-style: none; flex: 0 0 auto; }
.pg-nav__link {
  display: inline-block;
  padding: 9px 14px;
  border-radius: 999px;
  color: var(--pg-muted);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: color .18s var(--pg-ease), background-color .18s var(--pg-ease), box-shadow .18s var(--pg-ease);
}
.pg-nav__link:hover { color: var(--pg-paper); background: rgba(138, 59, 255, .18); }
.pg-nav__link[aria-current="page"] {
  color: var(--pg-paper);
  background: linear-gradient(120deg, rgba(138, 59, 255, .38), rgba(47, 123, 255, .22));
  box-shadow: inset 0 0 0 1px rgba(37, 245, 208, .38);
}
.pg-nav__cta { flex: 0 0 auto; }

.pg-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 15px;
  border: 1px solid var(--pg-line);
  border-radius: 999px;
  background: rgba(16, 21, 40, .92);
  color: var(--pg-paper);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: border-color .18s var(--pg-ease), color .18s var(--pg-ease);
}
.pg-nav-toggle:hover { border-color: rgba(37, 245, 208, .55); }
.pg-nav-toggle[aria-expanded="true"] { border-color: rgba(37, 245, 208, .6); color: var(--pg-paper); }
.pg-nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--pg-cyan);
  box-shadow: 0 -6px 0 var(--pg-cyan), 0 6px 0 var(--pg-cyan);
}
.pg-nav-toggle__text { white-space: nowrap; }

/* ---------- 右侧固定导轨 ---------- */
.pg-rail {
  position: fixed;
  right: clamp(8px, 1.4vw, 18px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 65;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pg-rail__btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 72px;
  padding: 13px 8px;
  border: 1px solid var(--pg-line);
  border-radius: 22px;
  background: linear-gradient(160deg, rgba(16, 21, 40, .94), rgba(7, 6, 11, .9));
  color: var(--pg-muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  cursor: pointer;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color .18s var(--pg-ease), color .18s var(--pg-ease), box-shadow .18s var(--pg-ease);
}
.pg-rail__btn:hover {
  color: var(--pg-paper);
  border-color: rgba(37, 245, 208, .5);
  box-shadow: 0 0 0 1px rgba(37, 245, 208, .25), 0 12px 30px rgba(6, 4, 16, .6);
}
.pg-rail__icon { font-size: 16px; color: var(--pg-cyan); }
.pg-rail__btn--help .pg-rail__icon { color: var(--pg-gold); }
.pg-rail__btn[aria-pressed="true"] {
  color: var(--pg-paper);
  border-color: rgba(255, 194, 75, .6);
  box-shadow: 0 0 0 1px rgba(255, 194, 75, .3);
}
.pg-rail__btn[aria-pressed="true"] .pg-rail__icon { color: var(--pg-gold); }

/* ---------- 按钮 ---------- */
.pg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--pg-font-body);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .01em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .18s var(--pg-ease), border-color .18s var(--pg-ease), color .18s var(--pg-ease), box-shadow .18s var(--pg-ease);
}
.pg-btn--gold {
  background: linear-gradient(120deg, var(--pg-gold), #FF9E3D);
  color: #20130A;
  box-shadow: 0 10px 26px rgba(255, 194, 75, .22);
}
.pg-btn--gold:hover { color: #20130A; box-shadow: 0 12px 32px rgba(255, 194, 75, .42); }
.pg-btn--violet {
  background: linear-gradient(120deg, var(--pg-violet), var(--pg-violet-deep));
  color: var(--pg-paper);
  box-shadow: 0 10px 26px rgba(138, 59, 255, .28);
}
.pg-btn--violet:hover { color: var(--pg-paper); box-shadow: 0 12px 32px rgba(138, 59, 255, .46); }
.pg-btn--ghost {
  background: rgba(138, 59, 255, .12);
  border-color: rgba(138, 59, 255, .5);
  color: var(--pg-paper);
}
.pg-btn--ghost:hover {
  color: var(--pg-paper);
  background: rgba(47, 123, 255, .18);
  border-color: rgba(37, 245, 208, .55);
}

/* ---------- 面包屑 ---------- */
.pg-crumb { padding: 4px 0 22px; }
.pg-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--pg-muted);
}
.pg-crumb__item { display: inline-flex; align-items: center; gap: 8px; }
.pg-crumb__item::after { content: "/"; color: rgba(154, 163, 184, .5); }
.pg-crumb__item:last-child::after { content: ""; }
.pg-crumb__link { color: var(--pg-muted); }
.pg-crumb__link:hover { color: var(--pg-cyan); }
.pg-crumb__item [aria-current="page"] { color: var(--pg-paper); }

/* ---------- 编号章节 ---------- */
.pg-chapter {
  position: relative;
  margin-bottom: clamp(32px, 4.5vw, 56px);
}
.pg-chapter__num {
  display: block;
  font-family: var(--pg-font-mono);
  font-weight: 800;
  font-size: clamp(38px, 6vw, 68px);
  line-height: .9;
  letter-spacing: -.04em;
  background: linear-gradient(160deg, var(--pg-violet), var(--pg-blue) 58%, var(--pg-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 10px;
}
.pg-chapter__title { margin-bottom: 12px; }
.pg-chapter__lead { color: var(--pg-muted); font-size: 17px; max-width: 38em; }

/* ---------- 面板 / 卡片 / 标签 ---------- */
.pg-panel {
  padding: clamp(18px, 2.4vw, 32px);
  border: 1px solid var(--pg-line);
  border-radius: var(--pg-radius-l);
  background: linear-gradient(150deg, rgba(16, 21, 40, .82), rgba(7, 6, 11, .62));
}

.pg-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2vw, 26px);
  border: 1px solid var(--pg-line);
  border-radius: var(--pg-radius-l);
  background: linear-gradient(160deg, rgba(16, 21, 40, .85), rgba(7, 6, 11, .68));
  transition: border-color .2s var(--pg-ease), box-shadow .2s var(--pg-ease);
}
.pg-card:hover {
  border-color: rgba(37, 245, 208, .45);
  box-shadow: 0 20px 44px rgba(6, 4, 16, .62), inset 0 0 0 1px rgba(138, 59, 255, .35);
}
.pg-card__top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.pg-card__title { font-family: var(--pg-font-head); font-weight: 800; font-size: 20px; color: var(--pg-paper); }
.pg-card__meta { font-size: 13px; color: var(--pg-muted); }

.pg-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--pg-cyan);
  background: rgba(37, 245, 208, .12);
  border: 1px solid rgba(37, 245, 208, .34);
}
.pg-tag--gold { color: var(--pg-gold); background: rgba(255, 194, 75, .12); border-color: rgba(255, 194, 75, .4); }
.pg-tag--violet { color: #CBB0FF; background: rgba(138, 59, 255, .16); border-color: rgba(138, 59, 255, .48); }
.pg-tag--blue { color: #9CC2FF; background: rgba(47, 123, 255, .14); border-color: rgba(47, 123, 255, .45); }

/* ---------- 图片位（页面阶段放 <img>） ---------- */
.pg-figure { display: flex; flex-direction: column; gap: 10px; margin: 0; }
.pg-figure__media {
  position: relative;
  overflow: hidden;
  min-height: 160px;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--pg-line);
  border-radius: var(--pg-radius-m);
  background:
    linear-gradient(140deg, rgba(138, 59, 255, .34), rgba(47, 123, 255, .22) 46%, rgba(37, 245, 208, .16)),
    repeating-linear-gradient(115deg, rgba(242, 243, 247, .05) 0 2px, transparent 2px 10px),
    var(--pg-ink-2);
}
.pg-figure__media > img { width: 100%; height: 100%; object-fit: cover; }
.pg-figure--wide .pg-figure__media { aspect-ratio: 21 / 9; }
.pg-figure--tall .pg-figure__media { aspect-ratio: 4 / 5; }
.pg-figure--square .pg-figure__media { aspect-ratio: 1 / 1; }
.pg-figure__label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--pg-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--pg-paper);
  background: rgba(7, 6, 11, .72);
  border: 1px solid rgba(37, 245, 208, .4);
}
.pg-figure__caption { font-size: 13px; color: var(--pg-muted); }

/* ---------- 目录 / 步骤 / 问答 / 数字 ---------- */
.pg-aside-sticky { position: sticky; top: calc(var(--pg-header-h) + 18px); }

.pg-toc {
  padding: 18px;
  border: 1px solid var(--pg-line);
  border-radius: var(--pg-radius-m);
  background: rgba(16, 21, 40, .72);
}
.pg-toc__title { font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--pg-muted); }
.pg-toc__list { display: flex; flex-direction: column; gap: 2px; margin-top: 12px; }
.pg-toc__link {
  display: block;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: 10px;
  color: var(--pg-muted);
  font-size: 14px;
  transition: color .18s var(--pg-ease), background-color .18s var(--pg-ease), border-color .18s var(--pg-ease);
}
.pg-toc__link:hover { color: var(--pg-paper); background: rgba(138, 59, 255, .14); }
.pg-toc__link[aria-current="true"] {
  color: var(--pg-paper);
  background: rgba(37, 245, 208, .12);
  border-left-color: var(--pg-cyan);
}

.pg-steps { display: grid; gap: 14px; }
.pg-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 18px;
  padding: 18px;
  border: 1px solid var(--pg-line);
  border-radius: var(--pg-radius-m);
  background: rgba(16, 21, 40, .6);
}
.pg-step__num { font-size: 22px; font-weight: 800; color: var(--pg-violet); line-height: 1.2; }
.pg-step__title { font-weight: 800; font-size: 17px; }
.pg-step__text { color: var(--pg-muted); font-size: 15px; margin-top: 4px; }

.pg-faq { display: flex; flex-direction: column; gap: 12px; }
.pg-faq__item {
  border: 1px solid var(--pg-line);
  border-radius: var(--pg-radius-m);
  background: rgba(16, 21, 40, .6);
  overflow: hidden;
}
.pg-faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  font-weight: 800;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
}
.pg-faq__q::-webkit-details-marker { display: none; }
.pg-faq__q::after { content: "＋"; font-family: var(--pg-font-mono); color: var(--pg-cyan); }
.pg-faq__item[open] .pg-faq__q::after { content: "－"; }
.pg-faq__a { padding: 0 18px 18px; color: var(--pg-muted); font-size: 15px; }

.pg-stat { display: flex; flex-direction: column; gap: 4px; }
.pg-stat__value {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  color: var(--pg-gold);
  line-height: 1.1;
}
.pg-stat__label { font-size: 13px; color: var(--pg-muted); }

/* ---------- 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .24s var(--pg-ease), transform .24s var(--pg-ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 页脚 ---------- */
.pg-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 120px);
  border-top: 1px solid var(--pg-line);
  background: linear-gradient(180deg, rgba(16, 21, 40, 0), rgba(16, 21, 40, .72) 32%, rgba(7, 6, 11, .98));
}
.pg-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(138, 59, 255, .85), rgba(37, 245, 208, .7), transparent);
}
.pg-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  padding-block: clamp(40px, 6vw, 72px);
  padding-right: var(--pg-rail-space);
}
.pg-footer__brand { display: flex; flex-direction: column; align-items: flex-start; }
.pg-brand--footer .pg-brand__name { font-size: 20px; }
.pg-footer__note { margin-top: 14px; max-width: 34em; font-size: 15px; color: var(--pg-muted); }
.pg-footer__cta { margin-top: 18px; }

.pg-footer__nav { display: contents; }
.pg-footer__col { min-width: 0; }
.pg-footer__title {
  margin-bottom: 14px;
  font-family: var(--pg-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--pg-cyan);
}
.pg-footer__list { display: flex; flex-direction: column; gap: 10px; }
.pg-footer__list a { color: var(--pg-muted); font-size: 15px; }
.pg-footer__list a:hover { color: var(--pg-paper); }

.pg-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 20px 0 34px;
  padding-right: var(--pg-rail-space);
  border-top: 1px solid var(--pg-line);
  font-size: 13px;
  color: var(--pg-muted);
}
.pg-footer__contact { max-width: 62em; }
.pg-footer__legal { font-size: 13px; color: var(--pg-muted); }

/* ---------- 响应式 ---------- */
@media (min-width: 761px) {
  :root { --pg-rail-space: 74px; }
}

@media (max-width: 1120px) {
  .pg-brand__tagline { display: none; }
  .pg-rail__btn { width: 56px; padding: 11px 6px; font-size: 11px; }
}

@media (max-width: 960px) {
  .pg-nav-toggle { display: inline-flex; }
  .pg-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    margin-left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 14px;
    border: 1px solid var(--pg-line);
    border-radius: 26px;
    background: linear-gradient(150deg, rgba(16, 21, 40, .98), rgba(7, 6, 11, .97));
    box-shadow: var(--pg-shadow);
    max-height: min(72vh, 480px);
    overflow-y: auto;
  }
  .pg-nav[data-open="true"] { display: flex; }
  .pg-nav__list { flex-direction: column; align-items: stretch; gap: 2px; overflow: visible; }
  .pg-nav__link { display: block; padding: 12px 14px; font-size: 16px; }
  .pg-nav__cta { justify-content: center; }
  .pg-header__inner { flex-wrap: nowrap; }
  .pg-span-3, .pg-span-4, .pg-span-5, .pg-span-6, .pg-span-7 { grid-column: span 12; }
  .pg-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pg-footer__brand { grid-column: span 2; }
}

@media (max-width: 760px) {
  :root { --pg-rail-space: 0px; }
  body { padding-bottom: 74px; }
  h1 { font-size: clamp(30px, 8vw, 40px); }
  .pg-rail {
    top: auto;
    bottom: 12px;
    right: 12px;
    transform: none;
    flex-direction: row;
    gap: 8px;
  }
  .pg-rail__btn { width: 48px; height: 48px; padding: 0; border-radius: 16px; }
  .pg-rail__text { display: none; }
  .pg-footer__inner { grid-template-columns: minmax(0, 1fr); padding-block: 36px; }
  .pg-footer__brand { grid-column: auto; }
  .pg-footer__meta { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .pg-brand__name { font-size: 16px; }
  .pg-brand__mark { width: 36px; height: 36px; font-size: 13px; }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .pg-progress { display: none; }
}