/* ==========================================================================
   AK体育直播 · 共享样式 /assets/site.css
   高原深夜蓝底 · 经幡五色数据高亮 · 转播扫描线 · 非对称编辑部版式
   ========================================================================== */

:root {
  --night: #08152E;
  --panel: #0F2547;
  --line: #1B3A6B;
  --white: #F4F7FF;
  --mist: #EAF0FB;
  --yellow: #F5C542;
  --red: #E8455A;
  --green: #2FA36B;
  --blue: #4A86E8;
  --grey: #93A6C6;

  --ink: #0A1A33;
  --ink-soft: #43566F;

  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-head: "Source Han Sans SC", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-cond: "Oswald", "Arial Narrow", "Helvetica Neue", "PingFang SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;

  --r-lg: 34px;
  --r-md: 22px;
  --r-sm: 14px;
  --pill: 999px;

  --shell: min(1320px, 100% - 2.5rem);
  --gap: clamp(16px, 2.2vw, 28px);
  --section-y: clamp(52px, 7vw, 104px);
  --shadow: 0 18px 48px rgba(3, 9, 22, 0.55);
}

/* ---------- 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, li, figure, figcaption, blockquote, dl, dd { margin: 0; }

ul, ol { padding: 0; list-style: none; }

img, svg, video { display: block; max-width: 100%; }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }

a { color: inherit; }

table { border-collapse: collapse; width: 100%; }

/* ---------- base ---------- */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--night);
  background-image:
    radial-gradient(90% 62% at 82% -12%, rgba(74, 134, 232, 0.20), transparent 68%),
    radial-gradient(70% 52% at -6% 108%, rgba(47, 163, 107, 0.12), transparent 70%),
    radial-gradient(60% 44% at 108% 118%, rgba(232, 69, 90, 0.10), transparent 72%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main-content { display: block; flex: 1 0 auto; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--white);
}

p { text-wrap: pretty; }

::selection { background: var(--yellow); color: var(--night); }

:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: -80px;
  transform: translateX(-50%);
  z-index: 200;
  padding: 12px 24px;
  border-radius: var(--pill);
  background: var(--yellow);
  color: var(--night);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 14px;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus { top: 16px; }

/* ---------- layout ---------- */
.container {
  width: var(--shell);
  margin-inline: auto;
}

.section { padding-block: var(--section-y); }

.section--band {
  background: var(--panel);
  border-block: 1px solid var(--line);
}

.section--mist {
  background: var(--mist);
  color: var(--ink);
}

.section--mist h1,
.section--mist h2,
.section--mist h3 { color: var(--ink); }

.section--mist .muted { color: var(--ink-soft); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.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-12 { grid-column: span 12; }

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(27, 58, 107, 0), var(--line) 18%, var(--line) 82%, rgba(27, 58, 107, 0));
}

.scan-field {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(244, 247, 255, 0.06) 0px,
    rgba(244, 247, 255, 0.06) 1px,
    transparent 1px,
    transparent 5px
  );
  animation: scan-drift 30s linear infinite;
}

.scan-field--soft { opacity: 0.5; }

@keyframes scan-drift {
  from { background-position: 0 0; }
  to { background-position: 0 240px; }
}

/* ---------- typography helpers ---------- */
.display {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(52px, 9vw, 148px);
  line-height: 0.94;
  letter-spacing: -0.02em;
}

.section-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.kicker {
  font-family: var(--font-cond);
  font-size: 12.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--yellow);
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--grey);
}

.lead {
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.72;
  color: #D8E2F6;
}

.muted { color: var(--grey); }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

.v-label {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-cond);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--grey);
}

.aside-note {
  padding-left: 14px;
  border-left: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.85;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.78;
}

.prose p + p { margin-top: 1.1em; }

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid currentColor;
  border-radius: var(--pill);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tag--yellow { color: var(--yellow); background: rgba(245, 197, 66, 0.10); }
.tag--red { color: var(--red); background: rgba(232, 69, 90, 0.10); }
.tag--green { color: var(--green); background: rgba(47, 163, 107, 0.12); }
.tag--blue { color: var(--blue); background: rgba(74, 134, 232, 0.12); }
.tag--grey { color: var(--grey); background: rgba(147, 166, 198, 0.08); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn--primary {
  background: var(--yellow);
  color: var(--night);
  box-shadow: 0 0 0 1px rgba(245, 197, 66, 0.45), 0 10px 22px rgba(245, 197, 66, 0.16);
}

.btn--primary:hover {
  background: #FFD766;
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(245, 197, 66, 0.6), 0 14px 26px rgba(245, 197, 66, 0.22);
}

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

.btn--ghost:hover {
  border-color: var(--yellow);
  color: var(--yellow);
  transform: translateY(-1px);
}

.section--mist .btn--ghost { border-color: #C3D2EA; color: var(--ink); }
.section--mist .btn--ghost:hover { border-color: var(--ink); color: var(--ink); }

/* ---------- panels ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--panel);
}

.panel--line {
  background: rgba(15, 37, 71, 0.55);
  border-radius: var(--r-md);
}

.panel--mist {
  background: var(--mist);
  border-color: #D6E0F2;
  color: var(--ink);
}

.panel--mist h1,
.panel--mist h2,
.panel--mist h3 { color: var(--ink); }

/* ---------- metrics ---------- */
.metric { display: grid; gap: 8px; }

.metric__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.metric__label {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey);
}

.metric__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: calc(1em * 1.6);
  line-height: 1;
  color: var(--white);
}

.metric__value--yellow { color: var(--yellow); }
.metric__value--red { color: var(--red); }
.metric__value--green { color: var(--green); }
.metric__value--blue { color: var(--blue); }

.metric__track {
  height: 8px;
  border-radius: var(--pill);
  background: rgba(27, 58, 107, 0.85);
  overflow: hidden;
}

.metric__fill {
  display: block;
  width: var(--value, 50%);
  height: 100%;
  border-radius: var(--pill);
  background: linear-gradient(90deg, var(--green), var(--blue));
  transition: width 0.5s ease;
}

.metric--red .metric__fill { background: linear-gradient(90deg, var(--red), var(--yellow)); }
.metric--yellow .metric__fill { background: linear-gradient(90deg, #E9A81F, var(--yellow)); }
.metric--blue .metric__fill { background: linear-gradient(90deg, var(--blue), #7FA9F2); }

/* ---------- figure frames (page-stage image containers) ---------- */
.figure-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, #12305C 0%, #0A1B3A 58%, #08152E 100%);
}

.figure-frame__media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(155deg, #12305C 0%, #0A1B3A 60%, #08152E 100%);
}

.figure-frame__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure-frame__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(244, 247, 255, 0.05) 0px,
    rgba(244, 247, 255, 0.05) 1px,
    transparent 1px,
    transparent 5px
  );
}

.figure-frame__caption {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  padding: 12px 18px;
  border-top: 1px solid var(--line);
  background: rgba(8, 21, 46, 0.65);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.figure-frame--wide .figure-frame__media { aspect-ratio: 21 / 9; }
.figure-frame--tall .figure-frame__media { aspect-ratio: 3 / 4; }
.figure-frame--square .figure-frame__media { aspect-ratio: 1 / 1; }

/* ---------- breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.breadcrumbs__link {
  color: var(--grey);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.breadcrumbs__link:hover {
  color: var(--yellow);
  border-bottom-color: currentColor;
}

.breadcrumbs__sep { color: var(--line); }

.breadcrumbs [aria-current="page"] { color: var(--white); }

/* ---------- reveal ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ==========================================================================
   页头
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  padding: 16px 0 12px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--blue), var(--green), var(--yellow), var(--red));
  pointer-events: none;
}

.header-shell {
  position: relative;
  width: var(--shell);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 26px);
  padding: 9px 12px 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(15, 37, 71, 0.86);
  box-shadow: 0 12px 34px rgba(3, 9, 22, 0.45);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  transition: padding 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header[data-stuck="true"] .header-shell {
  padding: 7px 10px 7px 14px;
  background: rgba(8, 21, 46, 0.95);
  border-color: rgba(245, 197, 66, 0.28);
  box-shadow: 0 10px 26px rgba(3, 9, 22, 0.6);
}

.brand {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--r-sm);
  background: linear-gradient(150deg, var(--yellow), #E9A81F);
  color: var(--night);
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.02em;
  box-shadow: 0 0 0 1px rgba(245, 197, 66, 0.5), 0 8px 18px rgba(245, 197, 66, 0.18);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.16;
}

.brand__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--white);
}

.brand__tagline {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--grey);
}

.nav {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 20px);
  margin-left: auto;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav__item { display: flex; }

.nav__link {
  display: inline-block;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 14.5px;
  color: #D7E1F5;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.nav__link:hover {
  color: var(--white);
  background: rgba(74, 134, 232, 0.18);
  border-color: rgba(74, 134, 232, 0.42);
  transform: translateY(-1px);
}

.nav__link[aria-current="page"] {
  color: var(--yellow);
  background: rgba(245, 197, 66, 0.10);
  border-color: rgba(245, 197, 66, 0.70);
}

.nav__cta { flex: 0 0 auto; }

.nav-toggle {
  position: relative;
  z-index: 1;
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.nav-toggle:hover {
  border-color: var(--yellow);
  color: var(--yellow);
}

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

.nav-toggle__bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-toggle__label { font-family: var(--font-head); font-weight: 700; }

/* ---------- header: tablet & mobile ---------- */
@media (max-width: 1060px) {
  .site-header { padding: 12px 0 10px; }

  .header-shell { padding: 8px 10px 8px 14px; }

  .nav-toggle { display: inline-flex; }

  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 12px);
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    margin-left: 0;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    background: rgba(9, 23, 48, 0.98);
    box-shadow: var(--shadow);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.24s ease, transform 0.24s ease, visibility 0.24s;
  }

  .nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav__link {
    display: block;
    padding: 12px 14px;
    border-radius: var(--r-sm);
    font-size: 15px;
  }

  .nav__link[aria-current="page"] { background: rgba(245, 197, 66, 0.12); }

  .nav__cta { width: 100%; margin-top: 6px; }

  html:not(.js) .header-shell { flex-wrap: wrap; }

  html:not(.js) .nav {
    position: static;
    width: 100%;
    margin-top: 10px;
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }
}

@media (max-width: 640px) {
  :root { --shell: min(1320px, 100% - 1.6rem); }

  .brand__tagline { display: none; }

  .brand__mark { width: 38px; height: 38px; font-size: 17px; }
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: auto;
  padding: clamp(44px, 6vw, 84px) 0 28px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #08152E 0%, #0A1B3A 58%, #0F2547 100%);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue), var(--green), var(--yellow), var(--red), transparent);
  opacity: 0.6;
}

.footer__inner {
  position: relative;
  z-index: 1;
}

.footer__top {
  display: grid;
  grid-template-columns: minmax(240px, 1.15fr) minmax(0, 2fr) minmax(228px, 1.05fr);
  gap: clamp(26px, 3.4vw, 56px);
}

.footer__brand { display: grid; gap: 10px; justify-items: start; }

.footer__mark {
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(38px, 4.6vw, 60px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--yellow);
  text-shadow: 0 0 26px rgba(245, 197, 66, 0.28);
}

.footer__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
}

.footer__tagline {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--grey);
}

.footer__intro {
  max-width: 40ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: #C7D4EC;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.4vw, 36px);
}

.footer__col { display: grid; gap: 12px; align-content: start; }

.footer__col-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey);
}

.footer__links { display: grid; gap: 9px; }

.footer__link {
  display: inline-block;
  font-size: 14.5px;
  color: #DCE6F8;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.footer__contact { display: grid; gap: 12px; align-content: start; }

.contact-list { display: grid; gap: 10px; }

.contact-list__item {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(27, 58, 107, 0.8);
}

.contact-list__key {
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey);
}

.contact-list__value {
  font-size: 14.5px;
  color: var(--white);
  word-break: break-word;
}

.footer__note {
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--grey);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  margin-top: clamp(30px, 4vw, 56px);
  padding-top: 20px;
  border-top: 1px solid rgba(27, 58, 107, 0.85);
}

.footer__legal {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.footer__icp {
  padding: 5px 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: #C7D4EC;
}

@media (max-width: 1024px) {
  .footer__top { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer__brand { grid-column: 1 / -1; }
  .footer__contact { grid-column: 1 / -1; max-width: 46ch; }
}

@media (max-width: 640px) {
  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__nav { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ==========================================================================
   响应式网格微调
   ========================================================================== */
@media (max-width: 1024px) {
  .span-3, .span-4, .span-5 { grid-column: span 6; }
  .span-7, .span-8, .span-9 { grid-column: span 12; }
}

@media (max-width: 640px) {
  body { font-size: 16.5px; }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

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

/* ==========================================================================
   动效偏好
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .scan-field { animation: none; }

  .scroll-progress,
  .btn,
  .nav,
  .nav__link,
  .footer__link,
  .branches,
  .metric__fill,
  .skip-link,
  .header-shell { transition: none; }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn--primary:hover,
  .btn--ghost:hover,
  .nav__link:hover { transform: none; }
}