/* ============================================================
   FY STADIUM · /assets/site.css
   共享外壳：变量 / 排版 / 头部 / 页脚 / 按钮 / 面包屑 / 网格 / 组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol, li { margin: 0; }
ul, ol { 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; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
:where(h1, h2, h3, h4) { line-height: 1.18; font-weight: 700; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --ink-900: #020806;
  --ink-bg: #061814;
  --panel: #0B2620;
  --line: #1D3A32;
  --line-soft: rgba(29, 58, 50, 0.66);
  --cyan: #35F0CF;
  --cyan-dim: rgba(53, 240, 207, 0.12);
  --orange: #FF6A2A;
  --red: #FF3B5C;
  --paper: #F5F1E6;
  --stone: #8EA49B;
  --clay: #C47A5A;

  --font-display: "Barlow Condensed", "DIN Condensed", "Oswald", "思源黑体 Heavy", "Noto Sans SC", sans-serif;
  --font-editorial: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shell-width: 1220px;
  --gutter: clamp(20px, 4.2vw, 72px);
  --radius: 3px;
  --radius-lg: 6px;
  --dur-fast: 180ms;
  --dur: 320ms;
  --dur-slow: 420ms;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --header-offset: 152px;
}

/* ---------- 3. 基础排版 ---------- */
html { scroll-behavior: smooth; }

body {
  background-color: var(--ink-bg);
  background-image: repeating-linear-gradient(180deg, rgba(53, 240, 207, 0.026) 0 1px, transparent 1px 5px);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(15px, 1vw, 16px);
  line-height: 1.75;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

::selection { background: var(--cyan); color: #04120F; }

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

#main-content {
  display: block;
  scroll-margin-top: var(--header-offset);
}

#main-content:focus { outline: none; }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: #04120F;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  transform: translateY(-180%);
  transition: transform var(--dur-fast) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 36px);
}
.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; }

.section { padding-block: clamp(44px, 7vw, 96px); }
.section--tight { padding-block: clamp(26px, 4vw, 56px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 28px;
  margin-bottom: clamp(22px, 3.4vw, 44px);
}
.section-head__title {
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(21px, 2.6vw, 32px);
  letter-spacing: 0.02em;
  color: var(--paper);
}
.section-head__note {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--stone);
  text-transform: uppercase;
}

/* ---------- 6. 文本组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--clay);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--clay);
}
.display-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.lede {
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--stone);
  max-width: 62ch;
}
.prose { color: var(--stone); max-width: 68ch; }
.prose p + p { margin-top: 0.95em; }
.prose strong { color: var(--paper); font-weight: 600; }
.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(20px, 3vw, 36px);
}

/* ---------- 7. 面板 ---------- */
.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 36px);
  box-shadow: 0 20px 48px -36px rgba(0, 0, 0, 0.95);
}
.panel--flush { padding: 0; overflow: hidden; }
.panel--edge::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), transparent 72%);
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.2;
  border: 1px solid transparent;
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 13px 100%, 0 calc(100% - 13px));
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--signal { background: var(--orange); color: #06110D; }
.btn--signal:hover { background: #ff8451; }

.btn--cyan { background: var(--cyan); color: #04120F; }
.btn--cyan:hover { background: #6df6de; }

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--paper);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.btn--sm { padding: 9px 16px; font-size: 12.5px; letter-spacing: 0.1em; }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb { margin-bottom: clamp(16px, 2.4vw, 28px); }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--stone);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb__item[aria-current="page"] { color: var(--paper); }
.breadcrumb__link { color: var(--stone); transition: color var(--dur-fast) var(--ease); }
.breadcrumb__link:hover { color: var(--cyan); }
.breadcrumb__sep { color: rgba(142, 164, 155, 0.45); }

/* ---------- 10. 图像容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(150deg, rgba(53, 240, 207, 0.12), rgba(2, 8, 6, 0.92) 55%, rgba(255, 106, 42, 0.14)),
    var(--panel);
}
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.95) contrast(1.05);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(2, 8, 6, 0.22) 0 1px, transparent 1px 3px);
  opacity: 0.55;
}
.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--paper);
  background: linear-gradient(180deg, transparent, rgba(2, 8, 6, 0.86));
}

/* ---------- 11. 状态标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(11, 38, 32, 0.6);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}
.tag--live { color: var(--orange); border-color: rgba(255, 106, 42, 0.5); }
.tag--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  animation: tagPulse 1.9s var(--ease) infinite;
}
.tag--alert { color: var(--red); border-color: rgba(255, 59, 92, 0.45); }

@keyframes tagPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.78); }
}

/* ============================================================
   12. 头部外壳 —— 居中刊头导航
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(6, 24, 20, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header[data-open="true"] { background: var(--ink-bg); }

/* 顶部窄条 */
.header-utility {
  overflow: hidden;
  max-height: 90px;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line-soft);
  transition: max-height var(--dur) var(--ease), opacity var(--dur-fast) var(--ease);
}
.header-utility__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 34px;
  padding-block: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}
.header-edition {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.tag-dot {
  width: 6px;
  height: 6px;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 106, 42, 0.16);
}
.header-tagline {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--stone);
  white-space: nowrap;
}
.utility-list {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: auto;
}
.utility-link {
  color: var(--stone);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.utility-link:hover { color: var(--paper); border-color: var(--line); }
.utility-link--signal { color: var(--orange); }
.utility-link--signal:hover { color: #ff9a6e; border-color: rgba(255, 106, 42, 0.5); }

/* 刊头 */
.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: 16px;
  padding-block: clamp(14px, 1.9vw, 22px);
  transition: padding-block var(--dur) var(--ease);
}
.brand {
  grid-column: 2;
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.03em;
  background: linear-gradient(158deg, rgba(53, 240, 207, 0.16), transparent 66%);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 78% 100%, 0 100%);
  transition: width var(--dur) var(--ease), height var(--dur) var(--ease), font-size var(--dur) var(--ease);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: 0.06em;
  color: var(--paper);
}
.brand__sub {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--stone);
}

/* 移动开关 */
.nav-toggle {
  display: none;
  grid-column: 3;
  justify-self: end;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color var(--dur-fast) var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* 导航 */
.site-nav {
  display: block;
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(11, 38, 32, 0.92), rgba(6, 24, 20, 0.55));
}
.site-nav__inner { display: flex; justify-content: center; }
.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(4px, 1.6vw, 26px);
  counter-reset: navIndex;
}
.nav-item { position: relative; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 13px 5px 15px;
  font-size: 14px;
  letter-spacing: 0.09em;
  color: var(--stone);
  transition: color var(--dur) var(--ease);
}
.nav-link::before {
  counter-increment: navIndex;
  content: "0" counter(navIndex);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--clay);
  transition: color var(--dur) var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 7px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0) skewX(-18deg);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}
.nav-link:hover { color: var(--paper); }
.nav-link:hover::after { transform: scaleX(0.62) skewX(-18deg); }
.nav-link:hover::before { color: var(--stone); }
.nav-link[aria-current="page"] { color: var(--cyan); }
.nav-link[aria-current="page"]::before { color: var(--cyan); }
.nav-link[aria-current="page"]::after { transform: scaleX(1) skewX(-18deg); }

/* 滚动进度 */
.scroll-meter {
  height: 2px;
  background: rgba(29, 58, 50, 0.7);
  overflow: hidden;
}
.scroll-meter__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

/* 滚动后收窄 */
.site-header[data-scrolled="true"] .header-utility {
  max-height: 0;
  opacity: 0;
}
.site-header[data-scrolled="true"] .masthead__inner { padding-block: 9px; }
.site-header[data-scrolled="true"] .brand__mark { width: 36px; height: 36px; font-size: 16px; }
.site-header[data-scrolled="true"] .brand__sub { display: none; }
.site-header[data-scrolled="true"] .brand__name { font-size: 22px; }

/* ============================================================
   13. 页脚 —— 深井收束
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 120px);
  background: var(--ink-900);
  border-top: 1px solid var(--line);
  color: var(--stone);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(53, 240, 207, 0) 48%, var(--orange));
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(28px, 5vw, 72px);
  padding-block: clamp(40px, 6vw, 78px);
}

.footer-brand .brand--footer {
  grid-column: auto;
  justify-self: start;
  color: var(--paper);
}
.brand--footer { display: inline-flex; align-items: center; gap: 10px; }
.brand--footer .brand__mark { width: 38px; height: 38px; font-size: 16px; }
.brand--footer .brand__name { font-size: 22px; }
.brand--footer .brand__sub { font-size: 9px; letter-spacing: 0.26em; }

.footer-brand__line {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}
.footer-summary {
  margin-top: 12px;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}
.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 20px;
  align-content: start;
}
.footer-col__title {
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--clay);
  margin-bottom: 14px;
}
.footer-links { display: grid; gap: 6px; }
.footer-link {
  display: inline-block;
  padding-block: 3px;
  font-size: 14px;
  color: var(--paper);
  opacity: 0.8;
  transition: color var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.footer-link:hover {
  color: var(--cyan);
  opacity: 1;
  transform: translateX(3px);
}

.footer-well {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 26px 40px;
  align-items: start;
  border-top: 1px solid var(--line);
  padding-block: clamp(24px, 4vw, 40px) clamp(28px, 4vw, 46px);
}
.footer-contact__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 16px;
}
.footer-contact__list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(24px, 4vw, 48px);
}
.footer-contact__item { display: flex; flex-direction: column; gap: 3px; }
.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clay);
}
.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
}
.footer-contact__note {
  margin-top: 16px;
  max-width: 62ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--stone);
}
.footer-icp {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}
.footer-legal { font-variant-numeric: tabular-nums; color: var(--stone); }
.footer-copyright { color: rgba(142, 164, 155, 0.8); }

/* ============================================================
   14. 动效协议
   ============================================================ */
[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
[data-js="on"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   15. 响应式
   ============================================================ */
@media (max-width: 1000px) {
  :root { --header-offset: 148px; }
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-well { grid-template-columns: 1fr; }
  .footer-icp { text-align: left; }
}

@media (max-width: 900px) {
  .header-utility { max-height: none; }
  .header-tagline { display: none; }
  .header-utility__inner { font-size: 10px; letter-spacing: 0.12em; }
  .utility-list { gap: 14px; }

  .masthead__inner {
    grid-template-columns: 1fr auto;
    column-gap: 12px;
    padding-block: 12px;
  }
  .brand { grid-column: 1; justify-self: start; }
  .brand__mark { width: 40px; height: 40px; font-size: 17px; }
  .brand__name { font-size: 22px; }
  .brand__sub { font-size: 8.5px; letter-spacing: 0.24em; }
  .nav-toggle { display: inline-flex; grid-column: 2; }

  .site-nav {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    transition: max-height var(--dur) var(--ease), opacity var(--dur-fast) var(--ease),
      visibility 0s linear var(--dur);
  }
  .site-nav[data-open="true"] {
    max-height: 72vh;
    overflow-y: auto;
    visibility: visible;
    opacity: 1;
    transition: max-height var(--dur-slow) var(--ease), opacity 240ms var(--ease);
  }
  .site-nav__inner { display: block; padding-block: 6px 14px; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item { border-bottom: 1px solid rgba(29, 58, 50, 0.62); }
  .nav-item:last-child { border-bottom: 0; }
  .nav-link {
    width: 100%;
    padding: 14px 6px;
    font-size: 15px;
    letter-spacing: 0.06em;
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] {
    color: var(--cyan);
    background: rgba(53, 240, 207, 0.08);
    box-shadow: inset 2px 0 0 var(--cyan);
  }
  .nav-link[aria-current="page"]::before { color: var(--cyan); }

  .site-header[data-scrolled="true"] .header-utility { max-height: none; opacity: 1; }
  .site-header[data-scrolled="true"] .brand__sub { display: none; }
}

@media (max-width: 760px) {
  .grid-12 { grid-template-columns: 1fr; }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: 1 / -1; }
  .footer-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-actions .btn { flex: 1 1 auto; }
}

@media (max-width: 460px) {
  .footer-columns { grid-template-columns: 1fr; }
  .utility-link { letter-spacing: 0.1em; }
}

/* ============================================================
   16. 动效偏好与可访问性兜底
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }
  [data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .btn:hover,
  .footer-link:hover { transform: none; }
  .site-nav,
  .header-utility { transition: none; }
}

@media print {
  .site-header, .site-footer, .skip-link { display: none; }
  body { background: #fff; color: #000; }
}