/* ============================================================
   试玩模拟站 · 共享样式 /assets/site.css
   夜牧调音台：暮色底 + 松石绿结构 + 暖沙金入口 + 电光紫提示
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ol, ul { margin: 0; }
ol, ul { padding: 0; list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --night-950: #0B1719;
  --ink-950: #050D0E;
  --teal-700: #134C46;
  --teal-500: #1F8C79;
  --teal-200: #8ED4C1;
  --gold-500: #E0AE55;
  --gold-200: #F6E2B6;
  --violet-500: #8B5CF6;
  --dusk-700: #3B2A5E;
  --mist-100: #EDF3F1;
  --stone-400: #9AAFA9;

  --glass: rgba(246, 226, 182, 0.10);
  --glass-line: rgba(246, 226, 182, 0.22);
  --solid-card: #0F2C2A;
  --solid-card-2: #123B37;
  --line-soft: rgba(142, 212, 193, 0.18);
  --line-gold: rgba(224, 174, 85, 0.42);

  --font-head: "Source Han Sans SC Heavy", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --hdr-h: 84px;
  --hdr-h-min: 64px;

  --r-xs: 2px;
  --r-s: 6px;
  --r-m: 12px;
  --r-l: 20px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-1: 180ms;
  --dur-2: 240ms;
  --dur-3: 420ms;
}

/* ---------- 3. Base / 中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--night-950);
  background-image:
    radial-gradient(900px 560px at 82% -8%, rgba(59, 42, 94, 0.72), transparent 66%),
    radial-gradient(760px 520px at 6% -4%, rgba(19, 76, 70, 0.78), transparent 68%);
  background-repeat: no-repeat;
  color: var(--mist-100);
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 仪表刻度底板 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(142, 212, 193, 0.055) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(246, 226, 182, 0.028) 0 1px, transparent 1px 24px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0) 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0) 78%);
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--mist-100);
}

p { text-wrap: pretty; }

:focus-visible {
  outline: 2px solid var(--violet-500);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

/* ---------- 4. Skip link ---------- */
.pgt-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 12px 18px;
  background: var(--gold-500);
  color: #241906;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.92rem;
  border-radius: var(--r-xs);
  box-shadow: 0 12px 30px rgba(5, 13, 14, 0.5);
  transform: translateY(-180%);
  transition: transform var(--dur-2) var(--ease);
}
.pgt-skip:focus { transform: translateY(0); }

/* ---------- 5. Header ---------- */
.pgt-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 120;
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  backdrop-filter: blur(14px) saturate(1.15);
  border-bottom: 1px solid var(--glass-line);
  transition:
    background-color var(--dur-3) var(--ease),
    border-color var(--dur-3) var(--ease),
    box-shadow var(--dur-3) var(--ease);
}
.pgt-header[data-scrolled="true"] {
  background: var(--teal-700);
  border-bottom-color: rgba(142, 212, 193, 0.28);
  box-shadow: 0 16px 40px rgba(5, 13, 14, 0.5);
}

.pgt-header__inner {
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
  height: var(--hdr-h);
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  transition: height var(--dur-3) var(--ease);
}
.pgt-header[data-scrolled="true"] .pgt-header__inner { height: var(--hdr-h-min); }

/* 品牌 */
.pgt-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}
.pgt-brand__glyph {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  padding: 6px;
  border: 1px solid rgba(142, 212, 193, 0.45);
  border-radius: var(--r-xs);
  background: linear-gradient(135deg, rgba(31, 140, 121, 0.4), rgba(224, 174, 85, 0.22));
}
.pgt-brand__glyph i {
  display: block;
  width: 3px;
  border-radius: 1px;
  background: var(--gold-200);
}
.pgt-brand__glyph i:nth-child(1) { height: 9px; background: var(--teal-200); }
.pgt-brand__glyph i:nth-child(2) { height: 20px; }
.pgt-brand__glyph i:nth-child(3) { height: 14px; background: var(--teal-200); }

.pgt-brand__words { display: flex; flex-direction: column; line-height: 1.12; }
.pgt-brand__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.06rem;
  letter-spacing: -0.02em;
  color: var(--mist-100);
}
.pgt-brand__ver {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--gold-500);
}

/* 导航 */
.pgt-nav { margin-inline: auto; }
.pgt-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 1vw, 8px);
}
.pgt-nav__item { display: block; }
.pgt-nav__link {
  position: relative;
  display: inline-block;
  padding: 9px 11px;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--mist-100);
  border-radius: var(--r-xs);
  transition: color var(--dur-2) var(--ease);
}
.pgt-nav__link::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 3px;
  height: 2px;
  background: var(--violet-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-2) var(--ease);
}
.pgt-nav__link:hover { color: var(--gold-200); }
.pgt-nav__link:hover::after { transform: scaleX(0.62); }
.pgt-nav__link[aria-current="page"] { color: var(--gold-200); }
.pgt-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* 头部件 */
.pgt-header__tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.pgt-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--teal-200);
  border: 1px solid rgba(142, 212, 193, 0.35);
  border-radius: var(--r-xs);
  white-space: nowrap;
  transition: color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}
.pgt-chip:hover { color: var(--gold-200); border-color: var(--line-gold); }
.pgt-chip--update {
  color: var(--gold-200);
  border-color: var(--line-gold);
  background: rgba(224, 174, 85, 0.08);
}
.pgt-chip--update::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--violet-500);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.22);
}

/* 汉堡 */
.pgt-burger {
  display: none;
  position: relative;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  border: 1px solid rgba(142, 212, 193, 0.4);
  border-radius: var(--r-xs);
  background: rgba(5, 13, 14, 0.35);
  cursor: pointer;
}
.pgt-burger__bar {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  border-radius: 1px;
  background: var(--mist-100);
  transition: transform var(--dur-2) var(--ease), opacity var(--dur-1) linear;
}
.pgt-burger__bar:nth-child(1) { top: 15px; }
.pgt-burger__bar:nth-child(2) { top: 22px; }
.pgt-burger__bar:nth-child(3) { top: 29px; }
.pgt-burger[aria-expanded="true"] .pgt-burger__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.pgt-burger[aria-expanded="true"] .pgt-burger__bar:nth-child(2) { opacity: 0; }
.pgt-burger[aria-expanded="true"] .pgt-burger__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 滚动进度尺 */
.pgt-header__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--teal-200) 0%, var(--gold-500) 62%, var(--violet-500) 100%);
  transition: transform 120ms linear;
  pointer-events: none;
}

@keyframes pgt-drop {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 6. Footer ---------- */
.pgt-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(40px, 6vw, 88px);
  padding: clamp(40px, 6vw, 72px) 0 26px;
  background: linear-gradient(180deg, rgba(19, 76, 70, 0.42) 0%, var(--ink-950) 46%);
  border-top: 1px solid rgba(142, 212, 193, 0.2);
  color: var(--stone-400);
  font-size: 0.92rem;
}
.pgt-footer__inner {
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
}
.pgt-footer__brandrow {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
}
.pgt-footer__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--mist-100);
}
.pgt-footer__ver {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold-500);
}
.pgt-footer__tagline {
  font-size: 0.86rem;
  color: var(--stone-400);
}

.pgt-footer__grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr 1.45fr 0.6fr;
  gap: clamp(20px, 2.8vw, 36px);
  margin-top: clamp(24px, 3.4vw, 40px);
}
.pgt-footer__col { min-width: 0; }
.pgt-footer__title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--teal-200);
  margin-bottom: 14px;
}
.pgt-footer__list li + li { margin-top: 9px; }
.pgt-footer__link {
  color: var(--stone-400);
  border-bottom: 1px solid transparent;
  transition: color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}
.pgt-footer__link:hover {
  color: var(--gold-200);
  border-bottom-color: var(--line-gold);
}
.pgt-footer__meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  line-height: 2.1;
  color: var(--stone-400);
  word-break: break-word;
}
.pgt-footer__note {
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
  gap: 10px;
}
.pgt-footer__vnum {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--gold-500);
}

.pgt-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}
.pgt-footer__copy {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: #6F8A84;
}
.pgt-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 0.84rem;
}

/* ---------- 7. 版面容器 ---------- */
.pgt-wrap {
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
}
#main-content,
.pgt-main {
  position: relative;
  z-index: 1;
  padding-top: var(--hdr-h);
}
.pgt-main--flush { padding-top: 0; }
.pgt-section {
  position: relative;
  padding-block: clamp(46px, 7vw, 92px);
}
.pgt-section--tight { padding-block: clamp(30px, 4vw, 52px); }
.pgt-section--loose { padding-block: clamp(64px, 9vw, 128px); }

/* ---------- 8. 排版组件 ---------- */
.pgt-h1 { font-size: clamp(2.6rem, 6vw, 4.6rem); line-height: 1.06; letter-spacing: -0.03em; }
.pgt-h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -0.028em; }
.pgt-h3 { font-size: clamp(1.15rem, 1.6vw, 1.4rem); letter-spacing: -0.018em; }
.pgt-lead {
  max-width: 60ch;
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.8;
  color: #CFE0DB;
}
.pgt-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-500);
}
.pgt-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold-500);
  flex: 0 0 auto;
}
.pgt-mono {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.pgt-num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold-200);
}
.pgt-muted { color: var(--stone-400); }
.pgt-vert {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  color: var(--teal-200);
}
.pgt-vert--gold { color: var(--gold-500); }

/* ---------- 9. 按钮 / 标签 ---------- */
.pgt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 20px;
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--r-xs);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color var(--dur-2) var(--ease),
    color var(--dur-2) var(--ease),
    border-color var(--dur-2) var(--ease),
    transform var(--dur-1) var(--ease);
}
.pgt-btn:active { transform: translateY(1px); }
.pgt-btn--gold {
  background: var(--gold-500);
  color: #2A1D06;
  box-shadow: 0 10px 26px rgba(224, 174, 85, 0.22);
}
.pgt-btn--gold:hover { background: var(--gold-200); }
.pgt-btn--ghost {
  background: transparent;
  color: var(--mist-100);
  border-color: rgba(142, 212, 193, 0.45);
}
.pgt-btn--ghost:hover { color: var(--gold-200); border-color: var(--line-gold); }
.pgt-btn--violet { background: var(--violet-500); color: #FFFFFF; }
.pgt-btn--violet:hover { background: #A181F8; }
.pgt-btn--sm { padding: 10px 15px; font-size: 0.87rem; }

.pgt-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--teal-200);
  background: rgba(31, 140, 121, 0.14);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-xs);
}
.pgt-tag--gold {
  color: var(--gold-200);
  background: rgba(224, 174, 85, 0.12);
  border-color: var(--line-gold);
}
.pgt-tag--violet {
  color: #C9B6FB;
  background: rgba(139, 92, 246, 0.14);
  border-color: rgba(139, 92, 246, 0.4);
}

/* ---------- 10. 卡片 / Bento 网格 ---------- */
.pgt-card {
  position: relative;
  padding: clamp(18px, 2.2vw, 26px);
  background: linear-gradient(180deg, var(--solid-card-2) 0%, var(--solid-card) 100%);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  min-width: 0;
}
.pgt-card--glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  backdrop-filter: blur(12px) saturate(1.1);
  border-color: var(--glass-line);
}
.pgt-card--focus {
  background-image: linear-gradient(135deg, rgba(31, 140, 121, 0.34) 0%, rgba(224, 174, 85, 0.16) 100%);
  border-color: rgba(142, 212, 193, 0.3);
}
.pgt-card--accent { border-color: var(--line-gold); }

.pgt-bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 26px);
}
.pgt-bento > * { grid-column: 1 / -1; min-width: 0; }

@media (min-width: 760px) {
  .pgt-bento > .pgt-c3 { grid-column: span 3; }
  .pgt-bento > .pgt-c4 { grid-column: span 4; }
  .pgt-bento > .pgt-c5 { grid-column: span 5; }
  .pgt-bento > .pgt-c6 { grid-column: span 6; }
  .pgt-bento > .pgt-c7 { grid-column: span 7; }
  .pgt-bento > .pgt-c8 { grid-column: span 8; }
  .pgt-bento > .pgt-c9 { grid-column: span 9; }
}

/* ---------- 11. 图片容器 ---------- */
.pgt-media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  background:
    linear-gradient(135deg, rgba(31, 140, 121, 0.24) 0%, rgba(59, 42, 94, 0.4) 55%, rgba(5, 13, 14, 0.8) 100%);
}
.pgt-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform var(--dur-3) var(--ease);
}
.pgt-media--4x3 { aspect-ratio: 4 / 3; }
.pgt-media--1x1 { aspect-ratio: 1 / 1; }
.pgt-media--21x9 { aspect-ratio: 21 / 9; }
.pgt-media--placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    repeating-linear-gradient(90deg, rgba(246, 226, 182, 0.08) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(0deg, rgba(142, 212, 193, 0.06) 0 1px, transparent 1px 28px);
}
.pgt-media__cap {
  position: absolute;
  left: 10px;
  bottom: 10px;
  z-index: 2;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--gold-200);
  background: rgba(5, 13, 14, 0.66);
  border: 1px solid rgba(246, 226, 182, 0.22);
  border-radius: var(--r-xs);
}
a.pgt-media:hover img { transform: scale(1.03); }

/* ---------- 12. 正文 / 面包屑 / 参数清单 / 刻度 ---------- */
.pgt-prose {
  max-width: 68ch;
  font-size: 1.05rem;
  line-height: 1.85;
  color: #D6E3DF;
}
.pgt-prose p + p { margin-top: 1em; }
.pgt-prose h2 {
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  margin-top: 1.8em;
  margin-bottom: 0.5em;
}
.pgt-prose h3 { font-size: 1.15rem; margin-top: 1.5em; margin-bottom: 0.4em; }
.pgt-prose ul, .pgt-prose ol { margin: 1em 0; padding-left: 1.1em; }
.pgt-prose li + li { margin-top: 0.45em; }
.pgt-prose ul li { position: relative; padding-left: 0.9em; }
.pgt-prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 7px;
  height: 1px;
  background: var(--gold-500);
}
.pgt-prose ol { list-style: decimal; }
.pgt-prose a { color: var(--gold-200); border-bottom: 1px solid var(--line-gold); }
.pgt-prose a:hover { color: var(--gold-500); }
.pgt-prose strong { color: var(--mist-100); font-weight: 700; }
.pgt-prose blockquote {
  margin: 1.4em 0;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--violet-500);
  color: var(--teal-200);
}

.pgt-breadcrumb { font-size: 0.78rem; letter-spacing: 0.06em; }
.pgt-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  color: var(--stone-400);
}
.pgt-breadcrumb li { display: flex; align-items: center; gap: 8px; }
.pgt-breadcrumb li + li::before { content: "/"; color: #4A625E; }
.pgt-breadcrumb a { color: var(--teal-200); }
.pgt-breadcrumb a:hover { color: var(--gold-200); }
.pgt-breadcrumb [aria-current="page"] { color: var(--gold-200); }

.pgt-kv {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 16px;
  font-size: 0.88rem;
}
.pgt-kv dt { color: var(--stone-400); }
.pgt-kv dd {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold-200);
  text-align: right;
}

.pgt-ticks {
  height: 12px;
  background-image: repeating-linear-gradient(90deg, rgba(142, 212, 193, 0.55) 0 1px, transparent 1px 14px);
  background-position: bottom left;
  background-repeat: repeat-x;
  opacity: 0.55;
}
.pgt-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(142, 212, 193, 0.5) 0%, rgba(224, 174, 85, 0.35) 45%, rgba(11, 23, 25, 0) 100%);
}

/* ---------- 13. 工具类 ---------- */
.pgt-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 14. 滚动显现 ---------- */
[data-reveal] { transition-delay: var(--reveal-delay, 0ms); }
html.pgt-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition-property: opacity, transform;
  transition-duration: var(--dur-3);
  transition-timing-function: var(--ease);
  will-change: opacity, transform;
}
html.pgt-js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1120px) {
  .pgt-chip { display: none; }
}

@media (max-width: 980px) {
  .pgt-footer__grid { grid-template-columns: 1fr 1fr; }
  .pgt-footer__note { justify-content: flex-start; }
}

@media (max-width: 900px) {
  :root { --hdr-h: 64px; --hdr-h-min: 56px; }

  .pgt-burger { display: block; }
  .pgt-header__tools { margin-left: auto; }

  .pgt-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    padding: 10px var(--gutter) 24px;
    display: none;
    max-height: calc(100vh - var(--hdr-h));
    overflow-y: auto;
    background: linear-gradient(180deg, rgba(19, 76, 70, 0.98) 0%, rgba(5, 13, 14, 0.99) 100%);
    border-bottom: 1px solid var(--line-soft);
    box-shadow: 0 26px 50px rgba(5, 13, 14, 0.55);
  }
  .pgt-nav[data-open="true"] {
    display: block;
    animation: pgt-drop var(--dur-3) var(--ease) both;
  }
  .pgt-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .pgt-nav__item { border-bottom: 1px solid rgba(142, 212, 193, 0.14); }
  .pgt-nav__item:last-child { border-bottom: 0; }
  .pgt-nav__link { display: block; padding: 14px 2px; font-size: 1rem; }
  .pgt-nav__link::after { left: 2px; right: auto; width: 34px; bottom: 9px; }
  .pgt-nav__link:hover::after { transform: scaleX(1); }
}

@media (max-width: 620px) {
  .pgt-footer__grid { grid-template-columns: 1fr; gap: 26px; }
  .pgt-footer__note { flex-direction: row; align-items: center; gap: 12px; }
  .pgt-footer__note .pgt-vert {
    writing-mode: horizontal-tb;
    letter-spacing: 0.24em;
  }
  .pgt-footer__vnum { writing-mode: horizontal-tb; letter-spacing: 0.2em; }
  .pgt-footer__base { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .pgt-header__tools { display: none; }
  .pgt-brand__ver { letter-spacing: 0.12em; }
  .pgt-btn { padding: 12px 16px; }
}

/* ---------- 16. 降低动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
  html.pgt-js [data-reveal] { opacity: 1; transform: none; }
  .pgt-header__progress { transition: none; }
}