/* ============================================================
   米乐赛场 · 共享 Site Kit  /assets/site.css
   夜间训练场记分牌 × 档案室索引
   ============================================================ */

:root {
  --ink-green: #0B1F1A;
  --charcoal: #141816;
  --cream: #F3EBDD;
  --cream-bright: #FBFFF0;
  --lime: #C7FF3D;
  --lime-soft: #DAFF7A;
  --orange: #FF7A3D;
  --ember: #D9542B;
  --brown-black: #2A1F1A;
  --mist: #A8B8AC;
  --line: #55756A;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shell-max: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --dur: .18s;
  --ease: cubic-bezier(.22,.61,.36,1);
  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ink-green);
  color: var(--cream);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { margin: 0 0 .55em; font-weight: 900; line-height: 1.15; letter-spacing: -.02em; color: var(--cream-bright); }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: var(--lime); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
img { max-width: 100%; }
button { font: inherit; color: inherit; }
#main-content { scroll-margin-top: 110px; }

:where(a, button, summary, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 6px;
}

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

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 14px;
  top: -72px;
  z-index: 120;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--lime);
  color: var(--charcoal);
  font-weight: 800;
  font-size: 14px;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 0; text-decoration: none; }

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink-green);
  border-bottom: 1px solid rgba(85, 117, 106, .45);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header[data-scrolled="true"] {
  border-bottom-color: var(--lime);
  box-shadow: 0 16px 38px rgba(0, 0, 0, .45);
}

/* 上层细条 */
.header-rail {
  background: var(--charcoal);
  border-bottom: 1px solid rgba(85, 117, 106, .38);
}
.header-rail__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 7px var(--gutter);
  display: flex;
  align-items: center;
  gap: 10px 20px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--mist);
}
.header-brandline {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  color: var(--cream);
  letter-spacing: .1em;
  white-space: nowrap;
}
.header-brandline__mark {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(199, 255, 61, .16);
  flex: 0 0 auto;
}
.header-utility {
  margin: 0;
  flex: 1 1 240px;
  min-width: 0;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.header-rail__links { display: flex; gap: 8px; margin-left: auto; }
.header-rail__link {
  display: inline-block;
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(85, 117, 106, .65);
  color: var(--cream);
  font-size: 11px;
  letter-spacing: .14em;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.header-rail__link:hover {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(199, 255, 61, .1);
  text-decoration: none;
}
.header-rail__link--alert {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--charcoal);
  font-weight: 700;
}
.header-rail__link--alert:hover {
  background: var(--ember);
  border-color: var(--ember);
  color: var(--cream-bright);
}

/* 主条 */
.header-main {
  position: relative;
  background: var(--ink-green);
  background-image:
    linear-gradient(90deg, rgba(85, 117, 106, .16) 1px, transparent 1px),
    linear-gradient(180deg, rgba(85, 117, 106, .07) 1px, transparent 1px);
  background-size: 76px 100%, 100% 76px;
  background-position: 0 0, 0 0;
}
.header-main__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 13px var(--gutter);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--cream);
  flex: 0 0 auto;
}
.brand:hover { text-decoration: none; }
.brand__glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--lime);
  color: var(--charcoal);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  box-shadow: 0 0 0 1px rgba(199, 255, 61, .35), 0 10px 20px rgba(0, 0, 0, .32);
  flex: 0 0 auto;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.12; }
.brand__name { font-size: 20px; font-weight: 900; letter-spacing: .01em; }
.brand__sub {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--mist);
}
.brand--footer .brand__glyph { width: 46px; height: 46px; }
.brand--footer .brand__name { font-size: 22px; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 15px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(85, 117, 106, .8);
  background: rgba(20, 24, 22, .65);
  color: var(--cream);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--lime); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px; height: 14px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] { border-color: var(--lime); color: var(--lime); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-toggle__text { white-space: nowrap; }

/* 栏目 */
.primary-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}
.primary-nav__list { display: flex; align-items: center; gap: 2px; }
.primary-nav__item { display: block; }
.primary-nav__link {
  display: inline-block;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  color: var(--cream);
  font-size: 14.5px;
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.primary-nav__link:hover {
  background: rgba(199, 255, 61, .14);
  color: var(--lime);
  text-decoration: none;
}
.primary-nav__link[aria-current="page"] {
  background: var(--lime);
  color: var(--charcoal);
  font-weight: 800;
}
.primary-nav__link[aria-current="page"]:hover {
  background: var(--lime-soft);
  color: var(--charcoal);
}
.primary-nav__cta { white-space: nowrap; }

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--lime { background: var(--lime); border-color: var(--lime); color: var(--charcoal); }
.btn--lime:hover { background: var(--lime-soft); border-color: var(--lime-soft); color: var(--charcoal); }
.btn--orange { background: var(--orange); border-color: var(--orange); color: var(--charcoal); }
.btn--orange:hover { background: var(--ember); border-color: var(--ember); color: var(--cream-bright); }
.btn--ghost { background: transparent; border-color: rgba(85, 117, 106, .85); color: var(--cream); }
.btn--ghost:hover { border-color: var(--lime); color: var(--lime); background: rgba(199, 255, 61, .08); }
.btn--sm { padding: 8px 15px; font-size: 13px; letter-spacing: .04em; }

/* ============================================================
   版心与分节
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: 820px; }
.section {
  padding-block: clamp(40px, 6vw, 88px);
  border-top: 1px solid rgba(85, 117, 106, .3);
}
.section:first-of-type { border-top: 0; }
.section--paper {
  background: var(--cream);
  color: var(--brown-black);
  border-top-color: rgba(42, 31, 26, .18);
  border-bottom: 1px solid rgba(42, 31, 26, .18);
}
.section--paper :where(h1, h2, h3, h4) { color: var(--brown-black); }
.section--paper .lede { color: rgba(42, 31, 26, .78); }
.section--paper a { color: var(--ember); }
.section--paper .eyebrow { color: var(--ember); }
.section--paper .btn { color: var(--charcoal); }
.section--paper .btn--ghost { color: var(--brown-black); border-color: rgba(42, 31, 26, .5); }
.section--paper .btn--ghost:hover { color: var(--brown-black); background: rgba(42, 31, 26, .08); border-color: var(--brown-black); }

.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--lime);
}
.section-title {
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.12;
  margin: 0 0 .5em;
}
.lede {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: var(--mist);
}
.vertical-note {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--line);
}

/* ---------- 网格 ---------- */
.grid { display: grid; gap: clamp(14px, 2vw, 26px); }
.grid--split { grid-template-columns: minmax(170px, 240px) minmax(0, 1fr); }
.grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ============================================================
   标签 / 日期胶囊 / 资料卡 / 数字
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  line-height: 1.6;
  white-space: nowrap;
}
.tag--lime { background: var(--lime); color: var(--charcoal); }
.tag--alert { background: var(--orange); color: var(--charcoal); }
.tag--muted {
  background: rgba(168, 184, 172, .14);
  color: var(--mist);
  border: 1px solid rgba(85, 117, 106, .6);
}
.section--paper .tag--muted {
  background: rgba(42, 31, 26, .08);
  color: rgba(42, 31, 26, .74);
  border-color: rgba(42, 31, 26, .22);
}

.date-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.date-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(85, 117, 106, .65);
  background: rgba(20, 24, 22, .5);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.date-chip:hover { border-color: var(--lime); color: var(--lime); text-decoration: none; }
.date-chip--active,
.date-chip[aria-current="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--charcoal);
  font-weight: 700;
}

.archive-card {
  background: var(--cream);
  color: var(--brown-black);
  border: 1px solid rgba(42, 31, 26, .16);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 2.4vw, 26px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .22);
}
.archive-card :where(h2, h3, h4) { color: var(--brown-black); }
.archive-card a { color: var(--ember); }
.archive-card--dark {
  background: rgba(20, 24, 22, .78);
  color: var(--cream);
  border-color: rgba(85, 117, 106, .55);
  box-shadow: none;
}
.archive-card--dark :where(h2, h3, h4) { color: var(--cream-bright); }
.archive-card--dark a { color: var(--lime); }
.archive-card__index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ember);
}
.archive-card--dark .archive-card__index { color: var(--lime); }
.archive-card__title { font-size: clamp(17px, 2vw, 21px); margin: 0 0 .4em; line-height: 1.3; }

.stat-figure {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 96px);
  font-weight: 700;
  line-height: .92;
  letter-spacing: -.03em;
  color: var(--lime);
}
.stat-caption {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.data-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 18px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(85, 117, 106, .34);
}
.data-row__label { font-size: 15px; color: var(--cream); }
.data-row__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  text-align: right;
}
.section--paper .data-row { border-bottom-color: rgba(42, 31, 26, .18); }
.section--paper .data-row__label { color: var(--brown-black); }
.section--paper .data-row__meta { color: rgba(42, 31, 26, .66); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}
.breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb a { color: var(--cream); }
.breadcrumb a:hover { color: var(--lime); text-decoration: none; }
.breadcrumb__sep { color: var(--line); }

/* ---------- 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(85, 117, 106, .5);
  background:
    linear-gradient(150deg, #132C24 0%, var(--ink-green) 52%, var(--charcoal) 100%);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 4 / 5; }
.media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.72) contrast(1.04) brightness(.94);
}
.media-frame__tag {
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 2px solid var(--lime);
  background: rgba(11, 31, 26, .72);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.media-frame__marker {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  height: 2px;
  background: var(--orange);
  border-radius: 2px;
}

/* ---------- 滚动显现协议 ---------- */
[data-reveal] { --reveal-delay: 0ms; }
@media (prefers-reduced-motion: no-preference) {
  html.js-reveal [data-reveal] {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .52s var(--ease), transform .52s var(--ease);
    transition-delay: var(--reveal-delay);
  }
  html.js-reveal [data-reveal].is-revealed {
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--charcoal);
  color: var(--cream);
  border-top: 1px solid rgba(85, 117, 106, .5);
}
.footer-rail {
  background: var(--ink-green);
  border-bottom: 1px solid rgba(85, 117, 106, .35);
}
.footer-rail__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 9px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}
.footer-main {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(30px, 5vw, 62px) var(--gutter) 0;
  display: grid;
  grid-template-columns: minmax(240px, 1.1fr) minmax(0, 2fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.footer-brand__summary {
  margin: 16px 0 18px;
  max-width: 34ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}
.footer-brand__mark {
  display: block;
  width: 82px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--lime) 55%, var(--orange) 55%, var(--orange) 100%);
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
}
.footer-col__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lime);
}
.footer-col__list { display: grid; gap: 10px; }
.footer-col__list a {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  color: var(--cream);
  font-size: 15px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-col__list a:hover { color: var(--lime); border-bottom-color: var(--lime); text-decoration: none; }

.footer-contact {
  max-width: var(--shell-max);
  margin: clamp(26px, 4vw, 44px) auto 0;
  padding: 0 var(--gutter);
}
.footer-contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px 24px;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid rgba(85, 117, 106, .45);
  border-radius: var(--radius-md);
  background: rgba(11, 31, 26, .55);
}
.contact-line { margin: 0; display: flex; flex-direction: column; gap: 7px; }
.contact-line__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}
.contact-line__row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.contact-line__value {
  font-size: 15px;
  line-height: 1.7;
  color: var(--cream-bright);
  overflow-wrap: anywhere;
}
.contact-line__value--mono { font-family: var(--font-mono); letter-spacing: .02em; }
.copy-btn {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(85, 117, 106, .75);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.copy-btn:hover { color: var(--lime); border-color: var(--lime); }
.copy-btn[data-copied="true"] { background: var(--lime); border-color: var(--lime); color: var(--charcoal); font-weight: 700; }
.copy-btn[data-copied="false"] { background: rgba(255, 122, 61, .18); border-color: var(--orange); color: var(--orange); }
.footer-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}
.footer-bottom {
  margin-top: clamp(24px, 4vw, 40px);
  border-top: 1px solid rgba(85, 117, 106, .35);
}
.footer-bottom__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}
.footer-copy, .footer-icp { margin: 0; }
.footer-legal-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-legal-links a { color: var(--mist); }
.footer-legal-links a:hover { color: var(--lime); text-decoration: none; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1099px) {
  .footer-main { grid-template-columns: 1fr; }
  .footer-brand__summary { max-width: 52ch; }
}

@media (max-width: 959px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 70;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 14px var(--gutter) 22px;
    background: var(--charcoal);
    border-top: 1px solid rgba(85, 117, 106, .5);
    border-bottom: 1px solid rgba(85, 117, 106, .5);
    box-shadow: 0 26px 44px rgba(0, 0, 0, .5);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }
  .primary-nav[data-open] { display: flex; }
  .primary-nav__list { flex-direction: column; align-items: stretch; gap: 2px; width: 100%; }
  .primary-nav__link {
    display: block;
    padding: 14px 14px;
    border-radius: var(--radius-sm);
    font-size: 16px;
  }
  .primary-nav__link[aria-current="page"] { border-radius: var(--radius-sm); }
  .primary-nav__cta { margin-top: 16px; width: 100%; padding: 13px 18px; font-size: 15px; }

  .grid--split,
  .grid--halves,
  .grid--thirds { grid-template-columns: minmax(0, 1fr); }
  .vertical-note { writing-mode: horizontal-tb; letter-spacing: .18em; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; line-height: 1.8; }
  .header-rail__inner { font-size: 11px; letter-spacing: .08em; }
  .header-utility { flex-basis: 100%; order: 3; }
  .header-rail__links { margin-left: auto; }
  .brand__glyph { width: 38px; height: 38px; font-size: 13px; border-radius: 10px; }
  .brand__name { font-size: 18px; }
  .brand__sub { font-size: 9px; letter-spacing: .2em; }
  .footer-rail__inner { justify-content: flex-start; font-size: 11px; letter-spacing: .1em; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-bottom__inner { flex-direction: column; align-items: flex-start; }
  .data-row { grid-template-columns: minmax(0, 1fr); }
  .data-row__meta { text-align: left; }
}

@media (max-width: 420px) {
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
}

/* ============================================================
   动效降级
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .btn:hover { transform: none; }
  .nav-toggle__bars span { transition: none; }
}