/* ============================================================
   安卓赛场 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 刊头 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, figcaption, blockquote, dl, dd { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img, svg, video, canvas { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; }

/* ---------- 2. Tokens ---------- */
:root {
  --signal: #3DDC84;
  --turf: #0B3D2E;
  --cyan: #19E3D1;
  --gold: #F2C14E;
  --violet: #5B4BFF;
  --night: #071A2B;
  --graphite: #1E293B;
  --mist: #F4F7F5;
  --neutral: #94A3B8;
  --alert: #FF5A5F;
  --ink: #04160D;

  --line: rgba(148, 163, 184, .24);
  --line-strong: rgba(148, 163, 184, .46);
  --body-text: #D6E0DC;

  --wrap: 1180px;
  --radius: 2px;

  --font-display: 'Noto Sans SC', 'Arial Black', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-serif: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', ui-monospace, 'SFMono-Regular', Consolas, monospace;
}

/* ---------- 3. 页面底与中文排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--body-text);
  background-color: var(--night);
  background-image:
    linear-gradient(180deg, rgba(11, 61, 46, .62) 0%, rgba(7, 26, 43, 0) 460px),
    repeating-linear-gradient(0deg, rgba(148, 163, 184, .055) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(148, 163, 184, .055) 0 1px, transparent 1px 72px);
  background-attachment: fixed, scroll, scroll;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--mist);
}

p { text-wrap: pretty; }

a { color: inherit; }

::selection { background: var(--signal); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 1px;
}

.u-eyebrow {
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--cyan);
}
.u-mono { font-family: var(--font-mono); }

.text-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 209, .45);
  transition: color .2s ease, border-color .2s ease;
}
.text-link:hover { color: var(--signal); border-color: var(--signal); }

/* ---------- 4. 布局骨架 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 4vw, 2.5rem);
}
.wrap--narrow { max-width: 840px; }

.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.75rem); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(238px, 1fr)); }

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(1.6rem, 4vw, 3rem);
}

.slash-band {
  height: clamp(64px, 11vw, 132px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(112deg,
      var(--turf) 0 34%,
      rgba(11, 61, 46, .18) 34% 41%,
      rgba(61, 220, 132, .18) 41% 43%,
      var(--night) 43% 100%);
}

/* ---------- 5. 章节与正文 ---------- */
.chapter { padding-block: clamp(2.4rem, 6.5vw, 5rem); }
.chapter + .chapter { border-top: 1px solid var(--line); }

.chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .35rem clamp(1rem, 3vw, 2rem);
  align-items: start;
}
.chapter__index {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--signal);
  padding-top: .35rem;
}
.chapter__title {
  font-size: clamp(1.7rem, 4.2vw, 2.9rem);
  font-weight: 900;
}
.chapter__lead {
  margin-top: .85rem;
  max-width: 62ch;
  font-size: 1.02rem;
  color: #C3D1CC;
}

.prose { max-width: 68ch; font-size: 1.02rem; color: var(--body-text); }
.prose > p + p { margin-top: 1rem; }
.prose h3 {
  margin-top: 1.8rem;
  font-size: 1.24rem;
  font-weight: 800;
  letter-spacing: 0;
}
.prose ul { margin-top: .9rem; }
.prose li {
  position: relative;
  padding-left: 1.1rem;
  margin-top: .45rem;
}
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 7px;
  height: 1px;
  background: var(--signal);
}

.aside-note {
  border-left: 2px solid var(--signal);
  padding: .2rem 0 .2rem 1rem;
  font-family: var(--font-serif);
  font-size: .92rem;
  color: #B4C3BE;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--mist);
  --btn-line: var(--line-strong);
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .62rem 1.1rem;
  border: 1px solid var(--btn-line);
  border-radius: var(--radius);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: .86rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--signal { --btn-bg: var(--signal); --btn-fg: var(--ink); --btn-line: var(--signal); }
.btn--signal:hover { --btn-bg: var(--cyan); --btn-line: var(--cyan); }
.btn--gold { --btn-fg: var(--gold); --btn-line: rgba(242, 193, 78, .55); }
.btn--gold:hover { --btn-bg: var(--gold); --btn-fg: #221803; --btn-line: var(--gold); }
.btn--ghost:hover { --btn-fg: var(--cyan); --btn-line: var(--cyan); }

/* ---------- 7. 面板 / 徽章 / 指标 ---------- */
.panel {
  padding: clamp(1.05rem, 2.4vw, 1.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(30, 41, 59, .9), rgba(10, 23, 37, .92));
  transition: border-color .22s ease, box-shadow .22s ease, transform .22s ease;
}
.panel:hover {
  border-color: rgba(25, 227, 209, .55);
  box-shadow: 0 22px 48px -40px rgba(25, 227, 209, .85);
  transform: translateY(-2px);
}
.panel--paper {
  background: var(--mist);
  border-color: rgba(11, 61, 46, .16);
  color: #0D2229;
}
.panel--paper .panel__title, .panel--paper h3 { color: #0B3D2E; }
.panel--turf {
  background: linear-gradient(155deg, var(--turf) 0%, var(--night) 92%);
  border-color: rgba(61, 220, 132, .3);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .2rem .5rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--neutral);
  white-space: nowrap;
}
.badge--signal { background: var(--signal); border-color: var(--signal); color: var(--ink); }
.badge--gold { background: var(--gold); border-color: var(--gold); color: #2A1D02; }
.badge--violet { background: rgba(91, 75, 255, .18); border-color: rgba(91, 75, 255, .75); color: #EDEAFF; }
.badge--alert { background: var(--alert); border-color: var(--alert); color: #3A0608; }

.metric {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  letter-spacing: -.02em;
  color: var(--mist);
  line-height: 1.1;
}
.metric--signal { color: var(--signal); }
.metric--gold { color: var(--gold); }
.metric--alert { color: var(--alert); }
.metric__unit {
  margin-left: .25em;
  font-size: .48em;
  letter-spacing: .08em;
  color: var(--neutral);
}

/* ---------- 8. 数据表 ---------- */
.data-table { width: 100%; font-size: .87rem; }
.data-table caption {
  caption-side: top;
  text-align: left;
  padding-bottom: .6rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--neutral);
}
.data-table th, .data-table td {
  padding: .62rem .7rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: baseline;
}
.data-table thead th {
  border-bottom-color: var(--line-strong);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--neutral);
}
.data-table td.num, .data-table th.num {
  font-family: var(--font-mono);
  text-align: right;
}
.data-table tbody tr { transition: background-color .18s ease; }
.data-table tbody tr:hover { background: rgba(61, 220, 132, .07); }

/* ---------- 9. 标签切换 ---------- */
.tabs {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(7, 26, 43, .55);
  overflow: hidden;
}
.tab-list {
  display: flex;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
}
.tab {
  appearance: none;
  background: none;
  border: 0;
  border-right: 1px solid var(--line);
  padding: .82rem 1.15rem;
  font-family: var(--font-body);
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--neutral);
  white-space: nowrap;
  cursor: pointer;
  transition: color .2s ease, background-color .2s ease;
}
.tab:hover { color: var(--mist); background: rgba(25, 227, 209, .08); }
.tab[aria-selected="true"] { background: var(--signal); color: var(--ink); }
.tab:focus-visible { outline: 2px solid var(--cyan); outline-offset: -2px; }
.tab-panel { padding: clamp(1.05rem, 2.6vw, 1.8rem); }
.tab-panel[hidden] { display: none; }
.tab-panel > h3 {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0;
  margin-bottom: .5rem;
}

/* ---------- 10. 面包屑 / 目录台账 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--neutral);
}
.breadcrumb a { color: var(--neutral); text-decoration: none; transition: color .2s ease; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: .5rem;
  color: rgba(148, 163, 184, .45);
}

.ledger { border-top: 1px solid var(--line-strong); }
.ledger__row {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: baseline;
  padding: .82rem .2rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: background-color .2s ease, padding-left .2s ease;
}
.ledger__row:hover { background: rgba(61, 220, 132, .07); padding-left: .6rem; }
.ledger__num {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 700;
  color: var(--signal);
}
.ledger__title { font-weight: 700; color: var(--mist); }
.ledger__meta {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--neutral);
  letter-spacing: .06em;
}

/* ---------- 11. 图片容器（页面阶段放图） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--turf);
  background-image:
    linear-gradient(165deg, rgba(11, 61, 46, .95) 0%, rgba(7, 26, 43, .96) 100%),
    repeating-linear-gradient(90deg, rgba(61, 220, 132, .14) 0 1px, transparent 1px 33.333%);
  box-shadow: 0 26px 52px -44px rgba(0, 0, 0, .95);
}
.media-frame > img,
.media-frame > picture > img,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(244, 247, 245, .07);
  pointer-events: none;
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--3x2 { aspect-ratio: 3 / 2; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }
.media-frame__caption {
  margin-top: .55rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--neutral);
}

/* ---------- 12. 刊头 Header ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, #071A2B 0%, #061420 100%);
  border-bottom: 1px solid var(--line);
  color: var(--mist);
  transition: box-shadow .24s ease;
}
.masthead.is-scrolled {
  box-shadow: 0 12px 36px -28px rgba(0, 0, 0, .95), 0 1px 0 rgba(61, 220, 132, .3);
}

.masthead__stripe {
  height: 4px;
  background: linear-gradient(100deg,
    var(--signal) 0 30%,
    var(--cyan) 30% 46%,
    var(--gold) 46% 50%,
    var(--turf) 50% 100%);
}

.masthead__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: .5rem clamp(1.1rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--line);
}
.masthead__kicker {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--neutral);
}
.masthead__dot {
  width: 6px;
  height: 6px;
  margin-right: .55rem;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(61, 220, 132, .16);
  animation: mastheadPulse 2.6s ease-in-out infinite;
}
@keyframes mastheadPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .3; }
}
.masthead__cta { flex: none; }

.masthead__brandrow {
  position: relative;
  display: grid;
  justify-items: center;
  gap: .35rem;
  padding: clamp(.9rem, 2.6vw, 1.6rem) clamp(1.1rem, 4vw, 2.5rem) clamp(.7rem, 2vw, 1.1rem);
}
.masthead__brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
}
.masthead__mark {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--signal);
  border-radius: 1px;
  box-shadow: inset 0 0 0 3px rgba(61, 220, 132, .12);
}
.masthead__mark::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--signal);
  opacity: .75;
}
.masthead__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 9px;
  height: 9px;
  border: 1px solid var(--signal);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.masthead__wordmark {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4.6vw, 2.55rem);
  font-weight: 900;
  letter-spacing: .12em;
  line-height: 1;
  color: var(--mist);
}
.masthead__wordmark-accent { color: var(--signal); }
.masthead__sub {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--neutral);
  text-align: center;
}

.masthead__toggle {
  display: none;
  align-items: center;
  gap: .5rem;
  position: absolute;
  right: clamp(1.1rem, 4vw, 2.5rem);
  top: 50%;
  transform: translateY(-50%);
  padding: .4rem .65rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--mist);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  cursor: pointer;
  transition: border-color .2s ease, color .2s ease;
}
.masthead__toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.masthead__toggle-bars {
  position: relative;
  width: 15px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
  transition: transform .22s ease;
}
.masthead__toggle[aria-expanded="true"] .masthead__toggle-bars {
  transform: rotate(90deg);
}

.masthead__nav {
  border-top: 1px solid var(--line);
  padding: .1rem clamp(1.1rem, 4vw, 2.5rem) .5rem;
}
.nav-index {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(.3rem, 1.6vw, 1.3rem);
}
.nav-index__item { display: block; }
.nav-index__link {
  position: relative;
  display: inline-block;
  padding: .62rem .2rem;
  font-size: .93rem;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--neutral);
  text-decoration: none;
  transition: color .2s ease;
}
.nav-index__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .26rem;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s ease;
}
.nav-index__link:hover { color: var(--mist); }
.nav-index__link:hover::after { transform: scaleX(1); }
.nav-index__link[aria-current="page"] { color: var(--signal); }
.nav-index__link[aria-current="page"]::after {
  height: 2px;
  background: var(--signal);
  transform: scaleX(1);
}

/* ---------- 13. 页脚 Footer ---------- */
.footer {
  margin-top: clamp(2.8rem, 8vw, 6rem);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #061420 0%, var(--turf) 100%);
  color: var(--mist);
}
.footer__rule {
  height: 3px;
  background: linear-gradient(100deg,
    var(--turf) 0 40%,
    var(--gold) 40% 44%,
    var(--cyan) 44% 58%,
    var(--signal) 58% 100%);
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.15fr;
  gap: clamp(1.5rem, 3vw, 2.6rem);
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 3.4rem) clamp(1.1rem, 4vw, 2.5rem) clamp(1.5rem, 3vw, 2.3rem);
}
.footer__brandcol { display: grid; gap: .7rem; align-content: start; }
.footer__brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: .12em;
  color: var(--mist);
}
.footer__desc {
  max-width: 34ch;
  font-size: .92rem;
  color: #BCCAC5;
}
.footer__data {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--signal);
}
.footer__col { display: grid; gap: .8rem; align-content: start; }
.footer__title {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--neutral);
}
.footer__list { display: grid; gap: .45rem; }
.footer__list a {
  font-size: .92rem;
  color: #D3DEDA;
  text-decoration: none;
  transition: color .2s ease;
}
.footer__list a:hover { color: var(--cyan); }
.footer__list--plain li {
  font-size: .9rem;
  color: #C4D1CC;
}
.footer__hint {
  font-family: var(--font-mono);
  font-size: .72rem !important;
  letter-spacing: .08em;
  color: var(--neutral) !important;
}
.footer__base {
  border-top: 1px solid var(--line);
}
.footer__baseinner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem 1.6rem;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 1rem clamp(1.1rem, 4vw, 2.5rem) 1.5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--neutral);
}

/* ---------- 14. 跳转链接 / 滚动进度 / 显现 ---------- */
.skip-link {
  position: fixed;
  left: 1rem;
  top: -4.5rem;
  z-index: 300;
  padding: .6rem 1rem;
  border-radius: var(--radius);
  background: var(--signal);
  color: var(--ink);
  font-size: .85rem;
  font-weight: 700;
  text-decoration: none;
  transition: top .2s ease;
}
.skip-link:focus { top: .75rem; }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  background: linear-gradient(90deg, var(--signal), var(--cyan));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s ease, transform .5s cubic-bezier(.2, .7, .3, 1);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer__inner { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer__brandcol { grid-column: span 3; }
}

@media (max-width: 900px) {
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-7, .col-8 { grid-column: span 12; }
}

@media (max-width: 860px) {
  body { font-size: 16px; }

  .masthead__toggle { display: inline-flex; }

  .masthead__nav { display: none; padding: .35rem clamp(1.1rem, 4vw, 2.5rem) .9rem; }
  .masthead__nav[data-open] {
    display: block;
    max-height: calc(100vh - 10rem);
    overflow-y: auto;
  }
  .nav-index { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-index__link {
    display: block;
    padding: .72rem .2rem;
    border-bottom: 1px solid var(--line);
    font-size: .98rem;
  }
  .nav-index__link::after { display: none; }
  .nav-index__link[aria-current="page"] {
    border-bottom-color: rgba(61, 220, 132, .55);
    background: rgba(61, 220, 132, .07);
    padding-left: .6rem;
  }

  .footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brandcol { grid-column: span 2; }
}

@media (max-width: 700px) {
  .chapter__head { grid-template-columns: minmax(0, 1fr); gap: .3rem; }
  .chapter__index { padding-top: 0; }
  .ledger__row { grid-template-columns: 2.4rem minmax(0, 1fr); row-gap: .2rem; }
  .ledger__meta { grid-column: 2; }
}

@media (max-width: 620px) {
  .masthead__kicker { font-size: .64rem; letter-spacing: .1em; }
  .masthead__cta { padding: .5rem .78rem; font-size: .78rem; }
  .masthead__sub { font-size: .64rem; letter-spacing: .08em; }
  .masthead__toggle-label { display: none; }
  .data-table th, .data-table td { padding: .5rem .45rem; }
  .footer__inner { grid-template-columns: minmax(0, 1fr); }
  .footer__brandcol { grid-column: span 1; }
  .footer__baseinner { flex-direction: column; }
}

@media (max-width: 420px) {
  .masthead__kicker { display: none; }
  .masthead__top { justify-content: flex-end; }
}

/* ---------- 16. 动效可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js .reveal { opacity: 1 !important; transform: none !important; }
  .scroll-progress { display: none; }
  .panel:hover, .btn:hover { transform: none; }
}