/* ============================================================
   博澳体育 — /assets/site.css
   夜间球场指挥中心：双轨头部、框景刻线、深色分区、单点荧光青
   ============================================================ */

:root {
  --night-950: #050B0E;
  --pitch-950: #071713;
  --slate-850: #102029;
  --slate-700: #1E3640;
  --mist-050: #EAF6F2;
  --fog-300: #9BB7B2;
  --cyan-400: #3DF5D0;
  --cyan-700: #0B8F7D;
  --orange-500: #FF5B2E;
  --amber-300: #FFC65C;

  --font-heading: "Barlow Condensed", "Oswald", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --shell: 1200px;
  --rail: 268px;
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --hair: 1px solid var(--slate-700);
  --gutter: clamp(16px, 4vw, 40px);
  --z-header: 100;
  --z-quick: 90;
}

/* ---------- 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, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, picture, video { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }

/* ---------- base ---------- */
body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.68;
  color: var(--mist-050);
  background-color: var(--night-950);
  background-image:
    radial-gradient(920px 540px at 88% -10%, rgba(11, 143, 125, 0.22), transparent 62%),
    radial-gradient(700px 440px at 4% 10%, rgba(255, 91, 46, 0.09), transparent 66%),
    linear-gradient(180deg, #050B0E 0%, #071713 46%, #050B0E 100%);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.01em;
  color: var(--mist-050);
}
h1 { font-size: clamp(32px, 5vw, 56px); }
h2 { font-size: clamp(23px, 3.2vw, 34px); }
h3 { font-size: clamp(18px, 2.1vw, 23px); }

p { color: var(--mist-050); }

a { transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease); }

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--cyan-400);
  color: #04120F;
}

.skip-link {
  position: absolute;
  top: 0;
  left: 8px;
  z-index: 999;
  transform: translateY(-140%);
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  background: var(--cyan-400);
  color: #04120F;
  font-size: 14px;
  font-weight: 700;
  transition: transform 0.2s var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- layout ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}
.section--tight { padding-block: clamp(32px, 4vw, 56px); }
.section--alt {
  background:
    linear-gradient(180deg, rgba(7, 23, 19, 0.94), rgba(7, 23, 19, 0.72));
  border-block: var(--hair);
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 960px) {
  .grid--split { grid-template-columns: var(--rail) minmax(0, 1fr); gap: clamp(24px, 3vw, 48px); }
}

/* ---------- typography utilities ---------- */
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-400);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--cyan-700);
}
.display {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(38px, 6.4vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.01em;
}
.lead {
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.75;
  color: var(--fog-300);
  max-width: 62ch;
}
.chapter-no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--cyan-700);
}
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 24px;
  margin-bottom: clamp(20px, 3vw, 36px);
}
.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--slate-700), rgba(30, 54, 64, 0));
  margin-block: clamp(24px, 3vw, 40px);
}
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan-400);
}
.link-arrow::after { content: "→"; transition: transform 0.18s var(--ease); }
.link-arrow:hover::after { transform: translateX(4px); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  transition: transform 0.18s var(--ease), background-color 0.18s var(--ease),
    border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.btn--primary {
  background: var(--cyan-400);
  color: #04120F;
  box-shadow: 0 8px 22px -12px rgba(61, 245, 208, 0.9);
}
.btn--primary:hover { background: #6BF9DD; transform: translateY(-1px); }
.btn--ghost {
  border-color: var(--slate-700);
  background: rgba(16, 32, 41, 0.65);
  color: var(--mist-050);
}
.btn--ghost:hover { border-color: var(--cyan-700); color: var(--cyan-400); }
.btn--accent { background: var(--orange-500); color: #1A0600; }
.btn--accent:hover { background: #FF7450; transform: translateY(-1px); }

/* ---------- chips / tags ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 1px solid var(--slate-700);
  border-radius: 999px;
  background: rgba(16, 32, 41, 0.7);
  font-size: 13px;
  color: var(--fog-300);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}
.chip:hover { color: var(--mist-050); border-color: var(--cyan-700); }
.chip[aria-pressed="true"] {
  color: #04120F;
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  font-weight: 600;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border-radius: 6px;
  border: 1px solid var(--slate-700);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fog-300);
}
.tag--accent { border-color: rgba(255, 91, 46, 0.5); color: var(--orange-500); }
.tag--amber { border-color: rgba(255, 198, 92, 0.45); color: var(--amber-300); }

/* ---------- cards ---------- */
.card {
  position: relative;
  padding: clamp(16px, 2.2vw, 24px);
  border: var(--hair);
  border-radius: var(--radius-m);
  background:
    linear-gradient(160deg, rgba(16, 32, 41, 0.96), rgba(7, 23, 19, 0.9));
  box-shadow: 0 18px 40px -32px rgba(0, 0, 0, 0.9);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}
.card:hover { transform: translateY(-2px); border-color: rgba(61, 245, 208, 0.32); }
.card--flat { background: rgba(16, 32, 41, 0.55); box-shadow: none; }
.card__title {
  font-family: var(--font-heading);
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 700;
  margin-bottom: 8px;
}
.card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fog-300);
  text-transform: uppercase;
}

/* ---------- breadcrumb / prose ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fog-300);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; color: var(--slate-700); }
.breadcrumb a:hover { color: var(--cyan-400); }

.prose { max-width: 70ch; }
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 1.8em; }
.prose h3 { margin-top: 1.5em; }
.prose p { font-size: 15px; line-height: 1.78; color: var(--mist-050); }
.prose ul, .prose ol { padding-left: 1.2em; list-style: disc; color: var(--fog-300); }
.prose li + li { margin-top: 0.4em; }
.prose a { color: var(--cyan-400); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- image containers ---------- */
.figure-frame {
  position: relative;
  overflow: hidden;
  border: var(--hair);
  border-radius: var(--radius-m);
  background:
    linear-gradient(150deg, var(--slate-850), var(--pitch-950) 70%);
  isolation: isolate;
}
.figure-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}
.figure-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 11, 14, 0) 48%, rgba(5, 11, 14, 0.72));
  pointer-events: none;
}
.figure-frame--wide { aspect-ratio: 16 / 9; }
.figure-frame--tall { aspect-ratio: 3 / 4; }
.figure-frame--square { aspect-ratio: 1 / 1; }
.figure-frame__label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: linear-gradient(180deg, rgba(5, 11, 14, 0.98), rgba(7, 23, 19, 0.97));
  border-bottom: var(--hair);
  box-shadow: 0 18px 40px -34px rgba(0, 0, 0, 1);
  backdrop-filter: blur(10px);
}

.header-top {
  background: var(--pitch-950);
  border-bottom: 1px solid rgba(30, 54, 64, 0.85);
}
.header-top__inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.6vw, 30px);
  min-height: 68px;
  padding-block: 10px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(61, 245, 208, 0.7);
  border-radius: 11px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: var(--cyan-400);
  background: radial-gradient(circle at 30% 18%, rgba(61, 245, 208, 0.22), transparent 72%);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(61, 245, 208, 0.22);
  border-radius: 7px;
}
.brand:hover .brand__mark { border-color: var(--cyan-400); color: #6BF9DD; }
.brand__stack { display: flex; flex-direction: column; gap: 3px; line-height: 1.1; }
.brand__name {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--mist-050);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.header-top__note {
  padding-left: clamp(12px, 2vw, 22px);
  border-left: 1px solid var(--slate-700);
  font-size: 13px;
  color: var(--fog-300);
  white-space: nowrap;
}

.header-top__kpi {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 24px);
  padding-left: clamp(12px, 2vw, 22px);
  border-left: 1px solid var(--slate-700);
}
.kpi__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}
.kpi__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog-300);
}

.header-top__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.header-nav__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  min-height: 54px;
  padding-block: 8px;
}
.header-nav__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog-300);
  white-space: nowrap;
}
.header-nav__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(61, 245, 208, 0.16);
}

.site-nav { flex: 1 1 auto; }
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
}
.site-nav__link {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 14px;
  color: var(--fog-300);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.site-nav__link:hover { color: var(--mist-050); background: var(--slate-850); }
.site-nav__link[aria-current="page"] {
  color: var(--cyan-400);
  background: rgba(61, 245, 208, 0.09);
  border-color: rgba(61, 245, 208, 0.38);
  font-weight: 600;
}

.header-nav__cta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  white-space: nowrap;
}
.header-nav__cta:hover { border-bottom-color: var(--cyan-400); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 14px;
  border: 1px solid var(--slate-700);
  border-radius: 999px;
  color: var(--cyan-400);
  font-size: 13px;
  font-weight: 600;
  background: rgba(16, 32, 41, 0.7);
}
.nav-toggle:hover { border-color: var(--cyan-700); }
.nav-toggle__glyph {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}
.nav-toggle__glyph span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease), width 0.22s var(--ease);
}
.nav-toggle__glyph span:nth-child(2) { width: 70%; }
.nav-toggle__label { line-height: 1; }

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: rgba(30, 54, 64, 0.55);
  opacity: 0.45;
  transition: opacity 0.25s var(--ease);
}
.scroll-meter[data-progress="on"] { opacity: 1; }
.scroll-meter__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan-700), var(--cyan-400) 62%, var(--amber-300));
  transition: transform 0.12s linear;
}

/* ---------- 移动快捷条 ---------- */
.quick-bar { display: none; }
.quick-bar__item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--fog-300);
  border-radius: 10px;
  border: 1px solid transparent;
}
.quick-bar__item:hover { color: var(--mist-050); }
.quick-bar__item[aria-current="page"] {
  color: var(--cyan-400);
  border-color: rgba(61, 245, 208, 0.35);
  background: rgba(61, 245, 208, 0.08);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background:
    radial-gradient(680px 320px at 12% 0%, rgba(11, 143, 125, 0.18), transparent 70%),
    var(--pitch-950);
  border-top: 1px solid rgba(61, 245, 208, 0.22);
  color: var(--mist-050);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--gutter);
  width: 64px;
  height: 2px;
  background: var(--cyan-400);
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3.6vw, 48px);
  padding-block: clamp(36px, 5vw, 64px);
}

.footer__ident { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.brand--footer .brand__mark { width: 36px; height: 36px; font-size: 18px; }
.brand--footer .brand__sub { color: var(--fog-300); }
.footer__line {
  font-size: 14px;
  color: var(--fog-300);
  max-width: 26ch;
  line-height: 1.7;
}
.footer__badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--slate-700);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.footer__col { min-width: 0; }
.footer__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fog-300);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: var(--hair);
}
.footer__list { display: flex; flex-direction: column; gap: 10px; }
.footer__link {
  display: inline-block;
  font-size: 14px;
  color: var(--mist-050);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}
.footer__link:hover { color: var(--cyan-400); border-bottom-color: rgba(61, 245, 208, 0.6); }
.footer__link[aria-current="page"] { color: var(--cyan-400); }

.footer__list--contact { gap: 14px; }
.footer__contact-item {
  display: grid;
  gap: 2px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist-050);
  overflow-wrap: anywhere;
}
.footer__key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-700);
}
.footer__more { margin-top: 16px; font-size: 13px; }

.footer__bar {
  border-top: var(--hair);
  background: rgba(5, 11, 14, 0.6);
}
.footer__bar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px;
}
.footer__legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--fog-300);
}
.footer__note {
  font-size: 12.5px;
  color: var(--fog-300);
  max-width: 62ch;
}

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 941px) {
  body { background-attachment: fixed; }
}

@media (max-width: 1180px) {
  .header-top__kpi { display: none; }
}

@media (max-width: 1080px) {
  .header-top__note { display: none; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__ident { grid-column: 1 / -1; }
}

@media (max-width: 940px) {
  .header-top__inner { min-height: 62px; gap: 12px; }
  .header-top__actions .btn--ghost { display: none; }
  .nav-toggle { display: inline-flex; }
  .header-nav__tag,
  .header-nav__cta { display: none; }
  .header-nav__inner { min-height: 54px; gap: 10px; }

  .site-nav {
    display: none;
    order: 9;
    width: 100%;
    margin-top: 8px;
    padding-top: 10px;
    border-top: var(--hair);
  }
  .site-header[data-open="true"] .site-nav { display: block; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 6px; }
  .site-nav__link {
    display: block;
    padding: 12px 14px;
    font-size: 15px;
    border-radius: 10px;
    border: 1px solid rgba(30, 54, 64, 0.8);
    background: rgba(16, 32, 41, 0.55);
  }
  .site-header[data-open="true"] .nav-toggle {
    border-color: rgba(61, 245, 208, 0.5);
    background: rgba(61, 245, 208, 0.1);
  }
  .site-header[data-open="true"] .nav-toggle__glyph span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .site-header[data-open="true"] .nav-toggle__glyph span:nth-child(2) { opacity: 0; }
  .site-header[data-open="true"] .nav-toggle__glyph span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

  .quick-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-quick);
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 4px;
    padding: 6px max(8px, env(safe-area-inset-left)) calc(6px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-right));
    background: rgba(7, 23, 19, 0.97);
    border-top: 1px solid rgba(61, 245, 208, 0.22);
    backdrop-filter: blur(12px);
  }
  body { padding-bottom: calc(62px + env(safe-area-inset-bottom)); }

  .footer__top { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer__bar-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 720px) {
  body { font-size: 14.5px; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .header-top__actions .btn { padding: 9px 14px; font-size: 13px; }
  .brand__name { font-size: 17px; }
  .brand__mark { width: 36px; height: 36px; font-size: 18px; }
  .section-head { align-items: flex-start; }
  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__line { max-width: 34ch; }
}

@media (max-width: 460px) {
  .brand__sub { letter-spacing: 0.14em; font-size: 9.5px; }
  .header-top__actions .btn { padding: 8px 12px; font-size: 12.5px; }
}

/* ============================================================
   动效与无障碍
   ============================================================ */
@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;
    scroll-behavior: auto !important;
  }
  .card:hover,
  .btn--primary:hover,
  .btn--accent:hover,
  .link-arrow:hover::after { transform: none; }
  .scroll-meter__bar { transition: none; }
}