/* ==========================================================================
   PG电子主站 · 共享样式表 /assets/site.css
   视觉体系：深夜数据监控中心 —— 深海蓝基底 / 电子青数据脉冲 / 霓虹紫账目分层
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, video, canvas { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }
input, select { font: inherit; color: inherit; }

/* ---------- 2. Tokens ---------- */
:root {
  --deep: #06182E;
  --panel: #0C2438;
  --cyan: #22D3EE;
  --violet: #8B5CF6;
  --amber: #FF8A3D;
  --ridge: #7FA3B8;
  --muted: #52708A;
  --mist: #B9CBD8;
  --paper: #F2F7FB;

  --glass: rgba(34, 211, 238, .12);
  --glass-soft: rgba(34, 211, 238, .06);
  --violet-soft: rgba(139, 92, 246, .14);
  --amber-soft: rgba(255, 138, 61, .14);

  --line: rgba(127, 163, 184, .22);
  --line-strong: rgba(34, 211, 238, .42);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-body: var(--font-display);
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --fs-display: clamp(2.6rem, 7vw, 6.5rem);
  --fs-h1: clamp(1.9rem, 3.6vw, 3rem);
  --fs-h2: clamp(1.35rem, 2.2vw, 1.9rem);
  --fs-h3: clamp(1.05rem, 1.4vw, 1.2rem);
  --fs-body: 1rem;
  --fs-small: .86rem;
  --fs-label: .72rem;
  --fs-micro: .7rem;

  --lh-tight: 1.14;
  --lh-body: 1.9;

  --rail: 262px;
  --header-h: 62px;
  --radius: 12px;
  --radius-lg: 18px;
  --gutter: clamp(20px, 4vw, 56px);
  --maxw: 1240px;
}

/* ---------- 3. 基础排版与背景氛围 ---------- */
body {
  min-height: 100vh;
  background-color: var(--deep);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(720px 460px at 82% -8%, rgba(34, 211, 238, .13), transparent 68%),
    radial-gradient(620px 520px at 4% 108%, rgba(139, 92, 246, .13), transparent 70%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(127, 163, 184, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 163, 184, .05) 1px, transparent 1px);
  background-size: 76px 76px;
}

main,
.sitefoot,
.page { position: relative; z-index: 1; }

/* ---------- 4. 排版工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: 880px; }

.label {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.7;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.h-display,
.h1, h1,
.h2, h2,
.h3, h3 { font-family: var(--font-display); color: var(--paper); }

.h-display {
  font-size: var(--fs-display);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: -.03em;
}
.h1, h1 { font-size: var(--fs-h1); font-weight: 800; line-height: 1.22; letter-spacing: -.015em; }
.h2, h2 { font-size: var(--fs-h2); font-weight: 700; line-height: 1.3; letter-spacing: -.01em; }
.h3, h3 { font-size: var(--fs-h3); font-weight: 600; line-height: 1.5; }

.prose { max-width: 34em; }
.prose p + p { margin-top: 1.05em; }
.lead { font-size: 1.06rem; color: var(--mist); max-width: 34em; }
.note { font-size: var(--fs-small); color: var(--muted); max-width: 42em; }

.accent-cyan { color: var(--cyan); }
.accent-violet { color: var(--violet); }
.accent-amber { color: var(--amber); }

.rule { height: 1px; border: 0; background: var(--line); }

.vert-note {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--muted);
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

/* ---------- 5. 按钮与焦点 ---------- */
:focus { outline: none; }
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--glass);
  color: var(--paper);
  font-size: .88rem;
  letter-spacing: .06em;
  line-height: 1.2;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}
.btn:hover { background: rgba(34, 211, 238, .2); border-color: var(--cyan); }
.btn--solid {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04131F;
  font-weight: 600;
}
.btn--solid:hover { background: #5BE3F5; border-color: #5BE3F5; }
.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--mist);
}
.btn--ghost:hover { background: rgba(127, 163, 184, .1); border-color: var(--ridge); color: var(--paper); }

/* ---------- 6. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  transform: translateY(-180%);
  background: var(--cyan);
  color: #04131F;
  font-size: .84rem;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 10px 18px;
  border-radius: 8px;
  transition: transform .18s ease;
}
.skip-link:focus { transform: none; }

/* ---------- 7. 头部：侧边轨道 ---------- */
.masthead {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  background: rgba(6, 24, 46, .95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.masthead__rail {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: var(--header-h);
  padding: 9px 18px;
}

.masthead__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  transform: scaleX(var(--p, 0));
  transform-origin: left center;
  pointer-events: none;
  z-index: 5;
}

/* 品牌 */
.brand { min-width: 0; }
.brand__link { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand__glyph {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(34, 211, 238, .5);
  border-radius: 10px;
  background: rgba(34, 211, 238, .08);
  box-shadow: inset 0 0 18px rgba(34, 211, 238, .18);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .84rem;
  letter-spacing: .06em;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; }
.brand__name { color: var(--paper); font-weight: 700; font-size: 1rem; letter-spacing: .02em; white-space: nowrap; }
.brand__sub { font-size: .7rem; color: var(--muted); letter-spacing: .08em; white-space: nowrap; }

/* 移动端抽屉按钮 */
.nav-toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--mist);
  transition: border-color .18s ease, background .18s ease;
}
.nav-toggle:hover { border-color: var(--line-strong); background: var(--glass-soft); }
.nav-toggle__icon { display: grid; gap: 4px; width: 16px; }
.nav-toggle__icon i {
  display: block;
  height: 1px;
  background: var(--cyan);
  transition: transform .2s ease;
}
.masthead[data-open="true"] .nav-toggle__icon i:first-child { transform: translateY(2.5px) rotate(45deg); }
.masthead[data-open="true"] .nav-toggle__icon i:last-child { transform: translateY(-2.5px) rotate(-45deg); }
.nav-toggle__text { font-size: .74rem; letter-spacing: .14em; }

/* 导航抽屉（移动端默认） */
.nav {
  position: fixed;
  z-index: 4;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  width: min(85vw, 320px);
  padding: 20px 16px 44px;
  background: rgba(8, 28, 48, .99);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  transform: translateX(-102%);
  visibility: hidden;
  transition: transform .26s ease, visibility .26s ease;
}
.masthead[data-open="true"] .nav { transform: none; visibility: visible; }

.nav__title { margin: 4px 0 14px; }
.nav__list { display: grid; gap: 2px; }
.nav__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 8px 8px 0;
  color: var(--mist);
  transition: background .16s ease, color .16s ease, border-color .16s ease;
}
.nav__link:hover { background: rgba(34, 211, 238, .09); color: var(--paper); }
.nav__link[aria-current="page"] {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: var(--glass);
}
.nav__link[aria-current="page"] .nav__num { color: var(--cyan); }
.nav__num { font-size: .68rem; letter-spacing: .1em; color: var(--muted); }
.nav__label { font-size: .94rem; }

/* 轨道底部信息（桌面端显示） */
.masthead__meta { display: none; }
.masthead__range { font-size: .82rem; color: var(--cyan); margin-top: 8px; }
.masthead__hint { margin-top: 12px; font-size: .74rem; line-height: 1.7; color: var(--muted); }
.masthead__cta { margin-top: 18px; width: 100%; padding: 10px 14px; }

/* 遮罩 */
.scrim {
  position: fixed;
  inset: 0;
  z-index: 1;
  background: rgba(3, 10, 20, .7);
}
.scrim[hidden] { display: none; }

/* ---------- 8. 页脚 ---------- */
.sitefoot {
  margin-top: clamp(56px, 9vw, 120px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(12, 36, 56, .72) 0%, rgba(4, 14, 26, .98) 100%);
}
.sitefoot::before {
  content: "";
  position: absolute;
  inset: -1px 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 211, 238, .55), transparent);
}
.sitefoot__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) clamp(26px, 3vw, 40px);
}
.sitefoot__mark {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: .18em;
  color: var(--paper);
}
.sitefoot__tag { margin-top: 10px; font-size: var(--fs-small); color: var(--cyan); letter-spacing: .08em; }
.sitefoot__legal {
  margin-top: 16px;
  font-size: .82rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 34em;
}
.sitefoot__col .label { margin-bottom: 14px; }
.sitefoot__list { display: grid; gap: 9px; }
.sitefoot__list a {
  font-size: .9rem;
  color: var(--mist);
  transition: color .16s ease;
}
.sitefoot__list a:hover { color: var(--cyan); }
.sitefoot__base {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  align-items: baseline;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px var(--gutter) 30px;
  border-top: 1px solid var(--line);
  font-size: .74rem;
  color: var(--muted);
  letter-spacing: .04em;
}
.sitefoot__base .mono { color: var(--ridge); }

@media (min-width: 760px) {
  .sitefoot__inner {
    grid-template-columns: minmax(0, 1.7fr) repeat(3, minmax(0, .85fr));
    gap: 28px;
  }
}

/* ---------- 9. 区块与章节头 ---------- */
.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(30px, 4vw, 54px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 22px;
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 3vw, 38px);
  border-bottom: 1px solid var(--line);
}
.section__num {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .22em;
  color: var(--cyan);
}
.section__title { font-size: var(--fs-h2); font-weight: 700; color: var(--paper); line-height: 1.3; }
.section__note { margin-left: auto; font-size: var(--fs-small); color: var(--muted); }

/* ---------- 10. 网格 ---------- */
.grid { display: grid; gap: clamp(16px, 2vw, 26px); }
.grid--2,
.grid--3,
.grid--asym { grid-template-columns: 1fr; }

@media (min-width: 720px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1080px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 960px) {
  .grid--asym { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); }
}

/* ---------- 11. 卡片与面板 ---------- */
.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(18px, 2.2vw, 28px);
}
.card--glass {
  background: var(--glass-soft);
  border-color: rgba(34, 211, 238, .22);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background .18s ease, border-color .18s ease;
}
.card--glass:hover { background: rgba(34, 211, 238, .1); border-color: var(--line-strong); }
.card__title { font-size: var(--fs-h3); font-weight: 600; color: var(--paper); line-height: 1.5; }
.card__body { margin-top: 10px; font-size: .93rem; color: var(--mist); line-height: 1.85; }
.card__meta {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: var(--fs-micro);
  letter-spacing: .08em;
  color: var(--muted);
}

/* ---------- 12. 数据件 ---------- */
.stat { display: flex; flex-direction: column; gap: 8px; }
.stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--paper);
}
.stat__unit { font-size: .42em; color: var(--muted); margin-left: .45em; letter-spacing: 0; }
.stat__label { font-size: var(--fs-micro); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }

.ledger-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .14em;
  text-transform: uppercase;
  line-height: 1.6;
  white-space: nowrap;
}
.ledger-tag--rebate { color: var(--cyan); background: var(--glass); }
.ledger-tag--points { color: var(--violet); background: var(--violet-soft); }
.ledger-tag--time { color: var(--amber); background: var(--amber-soft); }

/* 数据表 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  -webkit-overflow-scrolling: touch;
}
table.data { min-width: 640px; font-size: .89rem; }
table.data th,
table.data td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.data thead th {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  background: rgba(6, 24, 46, .7);
  white-space: nowrap;
  position: sticky;
  top: 0;
}
table.data tbody tr { transition: background .16s ease; }
table.data tbody tr:hover { background: rgba(34, 211, 238, .08); }
table.data tbody tr[data-ledger="rebate"]:hover { background: rgba(34, 211, 238, .12); }
table.data tbody tr[data-ledger="points"]:hover { background: rgba(139, 92, 246, .16); }
table.data tbody tr:last-child td { border-bottom: 0; }
table.data td.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--paper);
}

/* ---------- 13. 图像容器基础规则 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(34, 211, 238, .1), rgba(139, 92, 246, .1)),
    var(--panel);
  aspect-ratio: 16 / 9;
  isolation: isolate;
}
.media > img,
.media > svg,
.media > video,
.media > canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }
.media__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image:
    linear-gradient(rgba(127, 163, 184, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 163, 184, .16) 1px, transparent 1px);
  background-size: 34px 34px;
}
.media__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 2;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(6, 24, 46, .74);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 14. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .1em;
  color: var(--muted);
}
.breadcrumb a { color: var(--mist); transition: color .16s ease; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--ridge); opacity: .6; }
.breadcrumb [aria-current="page"] { color: var(--cyan); }

/* ---------- 15. 时间轴 ---------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(139, 92, 246, .5), transparent);
}
.timeline__item { position: relative; padding-bottom: 30px; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--deep);
  border: 1px solid var(--cyan);
}
.timeline__item:last-child { padding-bottom: 0; }
.timeline__date {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .14em;
  color: var(--cyan);
}
.timeline__title { margin-top: 4px; font-size: var(--fs-h3); font-weight: 600; color: var(--paper); }
.timeline__body { margin-top: 6px; font-size: .92rem; line-height: 1.85; color: var(--muted); max-width: 34em; }

/* ---------- 16. 折叠面板 ---------- */
.fold { border-bottom: 1px solid var(--line); }
.fold__btn {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 18px 4px;
  text-align: left;
  color: var(--paper);
  transition: color .16s ease;
}
.fold__btn:hover { color: var(--cyan); }
.fold__q { flex: 1; font-size: 1.02rem; font-weight: 600; line-height: 1.6; }
.fold__sign {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: border-color .16s ease;
}
.fold__sign::before,
.fold__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}
.fold__sign::before { width: 9px; height: 1px; }
.fold__sign::after { width: 1px; height: 9px; transition: opacity .18s ease; }
.fold__btn[aria-expanded="true"] .fold__sign::after { opacity: 0; }
.fold__btn[aria-expanded="true"] { color: var(--cyan); }
.fold__panel { padding: 0 4px 22px; }
.fold__panel[hidden] { display: none; }
.fold__panel .prose { font-size: .94rem; color: var(--mist); }

/* ---------- 17. 入场动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .12s linear, transform .12s linear;
}
[data-reveal="in"] { opacity: 1; transform: none; }

/* ---------- 18. 桌面端：轨道形态 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail); }

  .masthead {
    right: auto;
    bottom: 0;
    width: var(--rail);
    border-bottom: 0;
    border-right: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(12, 36, 56, .96) 0%, rgba(6, 24, 46, .99) 100%);
  }

  .masthead__rail {
    flex-direction: column;
    align-items: stretch;
    height: 100%;
    min-height: 0;
    gap: 0;
    padding: 34px 22px 24px;
    overflow-y: auto;
  }

  .nav-toggle { display: none; }

  .nav {
    position: static;
    width: auto;
    padding: 28px 0 0;
    background: none;
    border: 0;
    overflow: visible;
    transform: none;
    visibility: visible;
    transition: none;
  }
  .nav__list { gap: 2px; }
  .nav__title { margin-bottom: 12px; }

  .masthead__meta {
    display: block;
    margin-top: auto;
    padding-top: 26px;
    border-top: 1px solid var(--line);
  }

  .masthead__progress {
    top: 0;
    left: auto;
    right: -1px;
    bottom: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--cyan), var(--violet));
    transform: scaleY(var(--p, 0));
    transform-origin: top center;
  }

  .scrim { display: none; }
}

/* ---------- 19. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .skip-link { transition: none; }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}