/* ==========================================================================
   幻影体育汇 · 共享样式表 /assets/site.css
   基底：深空幻影紫同色阶 · 霓虹青聚光 · 电光橙状态点
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --ink-void: #120A24;
  --ink-night: #1B1036;
  --ink-panel: #271847;
  --line-purple: #3A2A63;
  --neon: #35F0D8;
  --neon-soft: #7DF7E7;
  --amber: #FF7A2F;
  --violet: #6A4DFF;
  --white: #F2F0FA;
  --mist: #A99FC7;
  --deep: #0A0614;

  --rail-w: 104px;
  --rail-w-open: 288px;
  --topbar-h: 60px;

  --gap-tight: 12px;
  --gap: 28px;
  --gap-section: 72px;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-num: "Barlow Condensed", "DIN Alternate", "Roboto Condensed", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --shadow-lift: 0 18px 42px rgba(10, 6, 20, .58);
  --ease: cubic-bezier(.2, .6, .2, 1);
  color-scheme: dark;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--white);
  background-color: var(--ink-void);
  background-image:
    radial-gradient(1100px 620px at 84% -12%, rgba(106, 77, 255, .22), transparent 70%),
    radial-gradient(760px 480px at 2% 14%, rgba(53, 240, 216, .08), transparent 68%);
  background-repeat: no-repeat;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.22;
  color: var(--white);
}

h1 { font-size: clamp(34px, 6vw, 58px); }
h2 { font-size: clamp(24px, 3.4vw, 34px); }
h3 { font-size: 19px; }

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--neon); text-decoration: none; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }
summary { cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 1px;
  box-shadow: 0 0 0 3px var(--deep);
  border-radius: 2px;
}

/* ---------- 3. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 300;
  padding: 10px 16px;
  background: var(--neon);
  color: var(--deep);
  font-weight: 700;
  border-radius: 2px;
}

.skip-link:focus {
  position: fixed;
  left: 14px;
  top: 14px;
  box-shadow: 0 0 0 2px var(--deep);
}

/* ---------- 4. 布局容器与章节 ---------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: var(--gap-section) 0; }
.section--tight { padding: 40px 0; }

.section__eyebrow {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 12px;
}

.section__title { margin-bottom: 14px; }

.section__desc {
  max-width: 38em;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
}

.annot {
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--mist);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  text-transform: uppercase;
  line-height: 1;
}

.annot--right { transform: rotate(180deg); }

.prose {
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.75;
  color: #DCD6F0;
}

.prose p + p { margin-top: 1em; }
.prose h2 { font-size: 24px; margin: 1.6em 0 .6em; }
.prose h3 { font-size: 19px; margin: 1.4em 0 .5em; }
.prose ul { margin: 1em 0; }
.prose li { padding-left: 20px; position: relative; }
.prose li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--neon);
}

/* ---------- 5. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--mist);
}

.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--line-purple); }
.breadcrumb a { color: var(--mist); }
.breadcrumb a:hover { color: var(--neon); }
.breadcrumb [aria-current="page"] { color: var(--white); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.2;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .18s var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn--neon {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--deep);
}
.btn--neon:hover { background: var(--neon-soft); border-color: var(--neon-soft); color: var(--deep); }

.btn--line {
  background: transparent;
  border-color: var(--line-purple);
  color: var(--white);
}
.btn--line:hover { border-color: var(--neon); color: var(--neon); }

/* ---------- 7. Bento 网格与卡片 ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
  align-items: start;
}

.bento__cell { min-width: 0; }

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-10 { grid-column: span 10; }
.span-11 { grid-column: span 11; }
.span-12 { grid-column: span 12; }

.card {
  position: relative;
  background: var(--ink-panel);
  border: 1px solid var(--line-purple);
  border-radius: 2px;
  padding: 22px;
}

.card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.card__title { font-size: 18px; font-weight: 900; }

.card__meta {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.card--accent { border-left: 3px solid var(--neon); }

.card--float {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lift);
  z-index: 2;
}

.tag {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  line-height: 1.5;
  color: var(--neon);
  border: 2px solid var(--neon);
  padding: 2px 8px;
  border-radius: 2px;
}

.tag--amber { color: var(--amber); border-color: var(--amber); }

.data-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1;
  color: var(--white);
}

.data-num--xl { font-size: clamp(32px, 5vw, 56px); }

/* ---------- 8. 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-purple);
  border-radius: 2px;
  background: var(--ink-night);
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--4x5 { aspect-ratio: 4 / 5; }

.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  text-align: center;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--mist);
  background:
    linear-gradient(135deg, rgba(106, 77, 255, .30), rgba(53, 240, 216, .10) 58%, transparent 100%),
    repeating-linear-gradient(90deg, rgba(58, 42, 99, .45) 0 1px, transparent 1px 18px);
}

.media__caption {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 9. 折叠组与标签页 ---------- */
.fold {
  border: 1px solid var(--line-purple);
  background: var(--ink-night);
  border-radius: 2px;
}

.fold + .fold { margin-top: var(--gap-tight); }

.fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  font-weight: 700;
  color: var(--white);
  list-style: none;
}

.fold__summary::-webkit-details-marker { display: none; }

.fold__summary::after {
  content: "＋";
  font-family: var(--font-num);
  font-size: 16px;
  color: var(--neon);
}

.fold[open] .fold__summary::after { content: "－"; }
.fold__summary:hover { color: var(--neon); }

.fold__body {
  padding: 0 18px 18px;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.75;
}

.tabs { position: relative; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line-purple);
}

.tab {
  background: transparent;
  border: 1px solid var(--line-purple);
  color: var(--mist);
  border-radius: 2px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.tab:hover { color: var(--white); border-color: var(--neon); }

.tab[aria-selected="true"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--deep);
}

.tabs__panel[hidden] { display: none; }

/* ---------- 10. 显现与返回顶部 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .38s var(--ease), transform .38s var(--ease);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.to-top {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--ink-panel);
  border: 1px solid var(--neon);
  color: var(--neon);
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .16em;
  border-radius: 2px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility 0s linear .2s;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition-delay: 0s;
}

.to-top:hover { background: var(--neon); color: var(--deep); }

/* ---------- 11. 头部：移动顶栏 ---------- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 14px;
  background: rgba(18, 10, 36, .95);
  border-bottom: 1px solid var(--line-purple);
  backdrop-filter: blur(10px);
}

.topbar__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  min-width: 0;
}

.topbar__mark {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--neon);
  border: 1px solid var(--line-purple);
  padding: 3px 6px;
  border-radius: 2px;
}

.topbar__name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--line-purple);
  border-radius: 2px;
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.nav-toggle:hover { border-color: var(--neon); color: var(--neon); }
.nav-toggle[aria-expanded="true"] { border-color: var(--neon); color: var(--neon); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--neon);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.nav-toggle__text { white-space: nowrap; }

/* ---------- 12. 头部：侧边轨道 ---------- */
.site-header { position: relative; z-index: 45; }

.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 55;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 22px 12px 20px;
  overflow: hidden;
  background: linear-gradient(180deg, #1B1036 0%, #120A24 58%, #0A0614 100%);
  border-right: 1px solid var(--line-purple);
  transition: width .26s var(--ease), transform .3s var(--ease);
}

.rail::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 10px;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(58, 42, 99, .95) 0 1px, transparent 1px 24px);
}

.rail__mast { flex: 0 0 auto; }

.rail__brand {
  display: block;
  color: var(--white);
  padding-left: 4px;
  border-left: 2px solid var(--neon);
}

.rail__brand-mark {
  display: block;
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .16em;
  line-height: 1.2;
}

.rail__brand-name {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--mist);
}

.rail__tagline {
  margin-top: 10px;
  padding-left: 6px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--mist);
  white-space: nowrap;
}

.rail__nav { flex: 1 1 auto; min-height: 0; }

.rail__item + .rail__item { margin-top: 4px; }

.rail__link {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 6px 10px;
  border-left: 2px solid transparent;
  border-radius: 2px;
  color: var(--mist);
  transition: color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}

.rail__num {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .1em;
  color: #7A69AA;
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
}

.rail__label {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  white-space: nowrap;
}

.rail__link:hover {
  color: var(--white);
  background: rgba(53, 240, 216, .07);
  border-left-color: var(--neon);
}

.rail__link[aria-current="page"] {
  color: var(--neon);
  background: rgba(53, 240, 216, .12);
  border-left-color: var(--neon);
}

.rail__link[aria-current="page"] .rail__num { color: var(--neon); }

.rail__foot {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--line-purple);
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 5px 10px;
  border: 1px solid var(--line-purple);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  white-space: nowrap;
}

.status-chip__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 0 rgba(255, 122, 47, .55);
  animation: hyty-pulse 2.4s var(--ease) infinite;
  flex: 0 0 auto;
}

.status-chip__text { white-space: nowrap; }

@keyframes hyty-pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 122, 47, .55); }
  70% { box-shadow: 0 0 0 8px rgba(255, 122, 47, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 122, 47, 0); }
}

.rail__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rail__actions .btn {
  width: 100%;
  justify-content: center;
  white-space: nowrap;
}

.rail__progress {
  position: absolute;
  top: 0;
  right: 3px;
  bottom: 0;
  width: 3px;
  z-index: 2;
  background: rgba(58, 42, 99, .5);
  pointer-events: none;
}

.rail__progress-fill {
  display: block;
  width: 100%;
  height: var(--read-progress, 0%);
  background: linear-gradient(180deg, var(--neon), var(--violet));
}

/* ---------- 13. 遮罩 ---------- */
.scrim {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(10, 6, 20, .68);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s var(--ease);
}

.site-header[data-open] .scrim {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--gap-section);
  background: var(--deep);
  border-top: 2px solid var(--line-purple);
  color: var(--mist);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: repeating-linear-gradient(90deg, rgba(58, 42, 99, .9) 0 1px, transparent 1px 28px);
  pointer-events: none;
}

.footer__frame {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  padding: 56px 20px 26px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.3fr 2fr;
  gap: var(--gap);
  padding-bottom: var(--gap);
  border-bottom: 1px solid var(--line-purple);
}

.footer__brand-mark {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--white);
}

.footer__brand-line {
  margin-top: 6px;
  font-size: 14px;
  color: var(--mist);
}

.footer__closing {
  margin-top: 18px;
  max-width: 30em;
  font-size: 13.5px;
  line-height: 1.8;
  color: #8F86B0;
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
}

.footer__col-title {
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .18em;
  color: var(--white);
  margin-bottom: 12px;
}

.footer__links li + li { margin-top: 8px; }

.footer__link {
  display: inline-block;
  font-size: 14.5px;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.footer__link:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.footer__contact {
  margin-top: var(--gap);
  padding: 20px 22px;
  border: 1px solid var(--line-purple);
  border-left: 3px solid var(--violet);
  background: rgba(27, 16, 54, .72);
}

.footer__contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  font-size: 14px;
  padding: 4px 0;
}

.footer__contact-label {
  flex: 0 0 84px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
  padding-top: 3px;
}

.footer__contact-value { color: var(--white); }

.footer__note {
  margin-top: 10px;
  font-size: 12.5px;
  color: #8F86B0;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  margin-top: var(--gap);
  padding-top: 18px;
  border-top: 1px solid rgba(58, 42, 99, .7);
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--mist);
}

.footer__icp { color: var(--white); }
.footer__copy { letter-spacing: .08em; }

.footer__stamp {
  position: absolute;
  right: -6px;
  bottom: -18px;
  font-family: var(--font-num);
  font-size: clamp(72px, 14vw, 168px);
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1;
  color: rgba(106, 77, 255, .1);
  pointer-events: none;
  user-select: none;
}

/* ---------- 15. 断点：手机与平板（轨道转为抽屉） ---------- */
@media (max-width: 1023px) {
  body { padding-top: var(--topbar-h); }

  .rail {
    width: min(320px, 86vw);
    transform: translateX(-104%);
    padding-top: calc(var(--topbar-h) + 18px);
    box-shadow: 0 30px 80px rgba(10, 6, 20, .7);
    overflow-y: auto;
  }

  .site-header[data-open] .rail { transform: translateX(0); }

  .rail__link { min-height: 48px; }
  .rail__progress { display: none; }
  .rail::after { opacity: .5; }

  .footer__top { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .section { padding: 52px 0; }
  .section--tight { padding: 32px 0; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .footer__frame { padding: 40px 16px 22px; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--gap-tight); }
  .footer__contact { padding: 16px; }
  .footer__contact-label { flex-basis: 100%; padding-top: 0; }
  .card { padding: 18px; }
  .bento { gap: 16px; }
}

/* 平板：Bento 列宽收敛 */
@media (max-width: 1023px) {
  .span-3, .span-4, .span-5, .span-6, .span-7,
  .span-8, .span-9, .span-10, .span-11 { grid-column: span 6; }
}

@media (max-width: 640px) {
  .span-3, .span-4, .span-5, .span-6, .span-7,
  .span-8, .span-9, .span-10, .span-11 { grid-column: span 12; }
}

/* ---------- 16. 断点：桌面（固定竖向轨道） ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
  .topbar { display: none; }
  .scrim { display: none; }

  .rail:hover,
  .rail:focus-within { width: var(--rail-w-open); }

  .rail__brand-name,
  .rail__tagline,
  .rail__label {
    opacity: 0;
    transform: translateX(-8px);
    transition: opacity .18s var(--ease), transform .18s var(--ease);
  }

  .rail__foot {
    visibility: hidden;
    opacity: 0;
    transition: opacity .18s var(--ease), visibility 0s linear .18s;
  }

  .rail:hover .rail__brand-name,
  .rail:focus-within .rail__brand-name,
  .rail:hover .rail__tagline,
  .rail:focus-within .rail__tagline,
  .rail:hover .rail__label,
  .rail:focus-within .rail__label {
    opacity: 1;
    transform: none;
    transition-delay: .06s;
  }

  .rail:hover .rail__foot,
  .rail:focus-within .rail__foot {
    visibility: visible;
    opacity: 1;
    transition-delay: 0s;
  }
}

/* 矮屏保护：压缩轨道内部节奏 */
@media (min-width: 1024px) and (max-height: 720px) {
  .rail { gap: 12px; padding-top: 16px; padding-bottom: 14px; }
  .rail__link { min-height: 40px; }
  .rail__foot { gap: 8px; padding-top: 10px; }
  .rail__actions { gap: 6px; }
}

/* ---------- 17. 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;
    transition-delay: 0s !important;
  }

  [data-reveal],
  [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }

  .card--float { transform: none; }
}