/* ==========================================================================
   乐竞中国 · 数据看台 — 全站共享样式 /assets/site.css
   框架式导航 + 分层海报构图 + 深墨绿近单色体系
   ========================================================================== */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }
button { cursor: pointer; }
table { width: 100%; border-collapse: collapse; }

/* ---------- tokens ---------- */
:root {
  --ink-abyss: #05130F;
  --stand-green: #0B241D;
  --panel-green: #123630;
  --line-green: #1F4C41;
  --neon: #3BF2C8;
  --mist: #9DFBE4;
  --shot: #FF6A3D;
  --amber: #FFC46B;
  --text: #EAF6F2;
  --muted: #8AA79E;

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --maxw: 1280px;
  --gutter: clamp(18px, 5vw, 64px);
  --header-h: 66px;

  --line-soft: rgba(31, 76, 65, 0.62);
  --line-hard: rgba(31, 76, 65, 1);
}

/* ---------- base ---------- */
body {
  min-height: 100%;
  background-color: var(--ink-abyss);
  background-image:
    radial-gradient(1200px 620px at 78% -12%, rgba(59, 242, 200, 0.10), transparent 68%),
    radial-gradient(900px 520px at 6% 112%, rgba(255, 106, 61, 0.07), transparent 70%),
    repeating-linear-gradient(0deg, rgba(31, 76, 65, 0.20) 0 1px, transparent 1px 74px),
    repeating-linear-gradient(90deg, rgba(31, 76, 65, 0.14) 0 1px, transparent 1px 74px);
  color: var(--text);
  font-family: var(--font-body);
  font-size: clamp(15px, 0.5vw + 13.8px, 17px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.012em;
  text-wrap: balance;
}
p, li { overflow-wrap: anywhere; }
a { color: var(--neon); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--mist); }
:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---------- layout utilities ---------- */
.container,
.footer-frame {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { position: relative; padding-block: clamp(3rem, 8vw, 6.5rem); }
.section + .section { border-top: 1px solid var(--line-soft); }
.section-head { max-width: 720px; margin-bottom: clamp(1.6rem, 4vw, 2.8rem); }
.section-title { font-size: clamp(1.9rem, 4.6vw, 3.2rem); }
.section-title--display {
  font-size: clamp(2.6rem, 9vw, 6rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--neon); }
.lede { max-width: 620px; color: var(--muted); }
.divider { height: 1px; background: linear-gradient(90deg, var(--neon), rgba(59, 242, 200, 0)); opacity: 0.5; }

.grid { display: grid; gap: clamp(1rem, 2.2vw, 1.75rem); }
.grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.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-12 { grid-column: span 12; }

/* ---------- annotations ---------- */
.annot,
.rail-text,
.rail-scale {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.annot--accent { color: var(--neon); }
.rail-text { writing-mode: vertical-rl; }
.rail-scale { writing-mode: vertical-rl; letter-spacing: 0.3em; color: rgba(59, 242, 200, 0.5); }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  isolation: isolate;
  background: rgba(5, 19, 15, 0.94);
  border-bottom: 1px solid var(--line-soft);
}
@supports (backdrop-filter: blur(8px)) {
  .site-header {
    background: rgba(5, 19, 15, 0.82);
    backdrop-filter: blur(10px) saturate(1.15);
  }
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon) 14% 86%, transparent);
  opacity: 0.85;
}
.header-frame {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  flex-direction: column;
}
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
  text-decoration: none;
}
.brand:hover { color: var(--text); }
.brand-mark {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--neon);
  box-shadow: 0 0 14px rgba(59, 242, 200, 0.8);
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.28rem;
  letter-spacing: 0.05em;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
}
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line-green);
  border-radius: 999px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--neon); color: var(--neon); }
.nav-toggle-bars {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--neon);
  box-shadow: 0 -5px 0 var(--neon), 0 5px 0 var(--neon);
  transition: box-shadow 0.2s ease, background-color 0.2s ease;
}
.site-header[data-open] .nav-toggle-bars {
  background: transparent;
  box-shadow: 0 -6px 0 var(--neon), 0 6px 0 var(--neon);
}
.nav-list { display: flex; flex-wrap: wrap; gap: 0.15rem 0.2rem; justify-content: flex-end; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.7rem;
  color: var(--text);
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: 0.26rem;
  height: 2px;
  background: var(--neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--mist); transform: translateY(-2px); }
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] {
  color: var(--neon);
  background: rgba(59, 242, 200, 0.10);
}
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.quick-rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding-top: 0.7rem;
  margin-top: 0.3rem;
  border-top: 1px dashed rgba(31, 76, 65, 0.9);
}
.quick-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}
.quick-list { display: flex; flex-wrap: wrap; gap: 0.3rem 0.4rem; }
.quick-link {
  display: inline-block;
  padding: 0.24rem 0.6rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.quick-link:hover,
.quick-link:focus-visible {
  color: var(--neon);
  border-color: var(--line-green);
  background: rgba(59, 242, 200, 0.07);
}
.quick-link[aria-current="page"] { color: var(--neon); border-color: var(--line-green); }
.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  pointer-events: none;
}
.scroll-meter-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--neon), var(--mist) 55%, var(--shot));
  transition: width 0.12s linear;
}
.frame-rail { display: none; }
.skip-link {
  position: absolute;
  left: 1rem;
  top: -120px;
  z-index: 120;
  padding: 0.6rem 1rem;
  background: var(--neon);
  color: var(--ink-abyss);
  font-weight: 700;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: top 0.18s ease;
}
.skip-link:focus { top: 0; color: var(--ink-abyss); }

/* 移动端抽屉 */
.header-drawer {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-height: calc(100vh - var(--header-h));
  max-height: calc(100dvh - var(--header-h));
  overflow-y: auto;
  padding: 0.8rem var(--gutter) 2.2rem;
  background: linear-gradient(180deg, rgba(11, 36, 29, 0.99), rgba(5, 19, 15, 0.99));
  border-bottom: 1px solid var(--neon);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
}
.site-header[data-open] .header-drawer {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.site-nav { width: 100%; }
.nav-item { width: 100%; }
.nav-list .nav-link {
  display: block;
  padding: 0.85rem 0.4rem;
  font-size: 1.05rem;
  border-radius: 0;
  border-bottom: 1px solid var(--line-soft);
}
.nav-list .nav-link::after { display: none; }
.nav-list .nav-link:hover { transform: none; background: rgba(59, 242, 200, 0.06); }
.quick-rail .quick-list { gap: 0.4rem; }

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, rgba(11, 36, 29, 0.85), var(--ink-abyss) 40%);
  border-top: 1px solid var(--line-soft);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon) 20% 80%, transparent);
  opacity: 0.6;
}
.footer-frame { padding-block: clamp(2.4rem, 6vw, 4rem) 1.6rem; }
.footer-grid { display: grid; gap: 2rem 1.5rem; grid-template-columns: 1fr; }
.footer-col { min-width: 0; }
.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--text);
}
.footer-note { max-width: 340px; margin-top: 0.7rem; color: var(--muted); font-size: 0.92rem; }
.footer-col--brand .btn { margin-top: 1.1rem; }
.footer-title {
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}
.footer-list { display: flex; flex-direction: column; gap: 0.45rem; }
.footer-link {
  color: var(--muted);
  font-size: 0.94rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-link:hover,
.footer-link:focus-visible { color: var(--neon); padding-left: 4px; }
.footer-link[aria-current="page"] { color: var(--neon); }
.footer-contact { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.35rem; }
.footer-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--text);
  font-size: 0.88em;
  letter-spacing: 0.02em;
}
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem 1.4rem;
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-soft);
}
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 1.1rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.footer-copy { font-family: var(--font-mono); letter-spacing: 0.06em; }
.footer-legal-link { color: var(--muted); font-size: 0.82rem; }
.footer-legal-link:hover,
.footer-legal-link:focus-visible { color: var(--neon); }
.footer-icp {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: rgba(138, 167, 158, 0.9);
}
.footer-tail {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.footer-tick {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--shot);
  box-shadow: 0 0 10px rgba(255, 106, 61, 0.9);
  flex: 0 0 auto;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--line-green);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.2s ease, color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.btn:hover { transform: translateY(-2px); color: var(--text); }
.btn--primary { background: var(--neon); border-color: var(--neon); color: var(--ink-abyss); }
.btn--primary:hover { background: var(--mist); border-color: var(--mist); color: var(--ink-abyss); }
.btn--ghost { background: transparent; color: var(--muted); }
.btn--ghost:hover { color: var(--neon); border-color: var(--neon); }
.btn--sm { padding: 0.45rem 0.9rem; font-size: 0.82rem; }

/* ---------- breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding-block: 1.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.crumb { color: var(--muted); }
.crumb:hover,
.crumb:focus-visible { color: var(--neon); }
.crumb[aria-current="page"] { color: var(--text); }
.crumb-sep { color: rgba(138, 167, 158, 0.5); }

/* ---------- cards & data blocks ---------- */
.card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.1rem, 2.4vw, 1.7rem);
  background: linear-gradient(165deg, rgba(18, 54, 48, 0.92), rgba(11, 36, 29, 0.92));
  border: 1px solid var(--line-green);
  border-radius: var(--radius-lg);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), rgba(59, 242, 200, 0));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}
.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  border-color: var(--neon);
  box-shadow: 0 20px 44px -28px rgba(0, 0, 0, 0.95);
}
.card:hover::after,
.card:focus-within::after { transform: scaleX(1); }

.stat-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.stat-row:last-child { border-bottom: 0; }
.stat { display: flex; align-items: baseline; gap: 0.4rem; }
.stat-label { color: var(--muted); font-size: 0.84rem; }
.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.16rem;
  color: var(--neon);
  text-align: right;
}
.meter {
  height: 6px;
  border-radius: 999px;
  background: rgba(31, 76, 65, 0.75);
  overflow: hidden;
}
.meter-bar {
  display: block;
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--neon), var(--mist));
  transition: width 0.3s ease;
}
.meter-bar--shot { background: linear-gradient(90deg, var(--shot), var(--amber)); }

/* ---------- chips & tags ---------- */
.chip-group { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.85rem;
  border: 1px solid var(--line-green);
  border-radius: 999px;
  background: rgba(18, 54, 48, 0.55);
  color: var(--muted);
  font-size: 0.83rem;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.chip:hover { color: var(--text); border-color: var(--mist); }
.chip[aria-pressed="true"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink-abyss);
  font-weight: 600;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid currentColor;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.tag--cyan { color: var(--neon); }
.tag--live { color: var(--shot); }
.tag--amber { color: var(--amber); }
.tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ---------- media ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--panel-green), var(--stand-green));
}
.media-frame img,
.media-frame svg,
.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(59, 242, 200, 0.24);
  border-radius: calc(var(--radius-lg) - 10px);
  pointer-events: none;
}
.media-frame__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- motion & utilities ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }
.to-top {
  position: fixed;
  right: clamp(12px, 3vw, 28px);
  bottom: clamp(12px, 3vw, 28px);
  z-index: 55;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-md);
  background: rgba(18, 54, 48, 0.92);
  color: var(--neon);
  font-size: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.to-top:hover { transform: translateY(-3px); border-color: var(--neon); }
.to-top[data-visible] { opacity: 1; visibility: visible; }
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- tablet ---------- */
@media (min-width: 720px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-col:nth-child(2) { margin-top: 1.6rem; }
  .footer-col:nth-child(4) { margin-top: 0.8rem; }
}

/* ---------- desktop ---------- */
@media (min-width: 900px) {
  .header-frame {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    column-gap: clamp(1rem, 3vw, 2.6rem);
    padding-block: 0.6rem;
  }
  .header-bar { min-height: 58px; }
  .nav-toggle { display: none; }
  .header-drawer {
    position: static;
    display: grid;
    grid-template-rows: auto auto;
    justify-items: end;
    row-gap: 0.35rem;
    max-height: none;
    overflow: visible;
    padding: 0;
    background: none;
    border: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .nav-list { flex-direction: row; gap: 0.15rem 0.2rem; }
  .nav-item { width: auto; }
  .nav-list .nav-link {
    display: inline-block;
    padding: 0.5rem 0.7rem;
    font-size: 0.95rem;
    border-bottom: 0;
    border-radius: var(--radius-sm);
  }
  .nav-list .nav-link::after { display: block; }
  .quick-rail {
    justify-content: flex-end;
    padding-top: 0.45rem;
    margin-top: 0;
    border-top-style: solid;
    max-height: 60px;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
  }
  .site-header[data-scrolled] .header-frame { padding-block: 0.2rem; }
  .site-header[data-scrolled] .header-bar { min-height: 52px; }
  .site-header[data-scrolled] .quick-rail {
    max-height: 0;
    padding-top: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    border-color: transparent;
  }
  .grid-12 > .span-4 { grid-column: span 4; }
}

@media (min-width: 1100px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1.25fr; }
  .footer-col:nth-child(2) { margin-top: 2.2rem; }
  .footer-col:nth-child(3) { margin-top: 1rem; }
  .footer-col:nth-child(4) { margin-top: 1.8rem; }
}

@media (min-width: 1280px) {
  .frame-rail {
    position: fixed;
    top: 122px;
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    pointer-events: none;
  }
  .frame-rail--left { left: 16px; }
  .frame-rail--right { right: 16px; }
  .frame-rail::before {
    content: "";
    width: 1px;
    height: 84px;
    background: linear-gradient(180deg, var(--neon), rgba(59, 242, 200, 0));
    opacity: 0.55;
  }
}

/* ---------- reduced motion ---------- */
@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;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
  .card:hover,
  .card:focus-within,
  .btn:hover,
  .nav-link:hover,
  .to-top:hover { transform: none; }
}