/* ============================================================
   必赢国际437 — 共享站点样式 /assets/site.css
   深夜赛况指挥面板 · 堆叠面板 · 悬浮胶囊导航
   ============================================================ */

/* ---------- 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, 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; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- Tokens ---------- */
:root {
  /* 色板 */
  --ink: #0A1628;
  --ink-2: #0d1c31;
  --carbon: #111418;
  --cyan: #00E5FF;
  --amber: #FFB300;
  --lime: #39FF14;
  --steel: #2A3441;
  --gray: #8A97A6;
  --panel: #F5F7FA;
  --violet: #7C4DFF;
  --teal: #00838F;

  /* 派生 */
  --text: #C3CDDA;
  --line: rgba(0, 229, 255, .22);
  --line-soft: rgba(138, 151, 166, .20);
  --line-hard: rgba(138, 151, 166, .34);

  /* 字体 */
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  /* 形状 */
  --radius: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, .55);
  --shadow-soft: 4px 4px 0 rgba(0, 0, 0, .40);
  --shadow-lift: 9px 9px 0 rgba(0, 0, 0, .55);

  /* 布局 */
  --wrap: 1200px;
  --gut: clamp(16px, 4vw, 40px);
  --stack: clamp(28px, 5vw, 64px);

  /* 动效 */
  --ease: cubic-bezier(.2, .7, .3, 1);
  --dur: 160ms;
}

/* ---------- Base ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--ink);
  background-image:
    radial-gradient(1040px 560px at 88% -10%, rgba(0, 229, 255, .10), transparent 62%),
    radial-gradient(780px 480px at 2% 4%, rgba(124, 77, 255, .10), transparent 60%),
    linear-gradient(180deg, #0A1628 0%, #0A1628 58%, #0b1420 100%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--panel);
}

h1 { font-size: clamp(30px, 5.2vw, 56px); }
h2 { font-size: clamp(24px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 26px); }

p { line-height: 1.75; }

strong { color: var(--panel); font-weight: 700; }

::selection { background: rgba(0, 229, 255, .30); color: #fff; }

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

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: .02em; }

.serif { font-family: var(--font-serif); }

/* ---------- Skip link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 200;
  transform: translate(-50%, -140%);
  padding: 10px 20px;
  border: 2px solid var(--cyan);
  border-top: 0;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--carbon);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(10, 22, 40, .92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

/* --- 顶部赛程栏 --- */
.racebar {
  position: relative;
  background: var(--carbon);
  border-bottom: 1px solid var(--line-soft);
}

.racebar__inner {
  width: min(var(--wrap), 100% - var(--gut) * 2);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 14px;
  height: 40px;
  font-size: 12px;
  letter-spacing: .04em;
  white-space: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}
.racebar__inner::-webkit-scrollbar { display: none; }

.racebar__dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, .16);
  animation: racebar-pulse 2.4s var(--ease) infinite;
}

@keyframes racebar-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(57, 255, 20, .16); }
  50%      { box-shadow: 0 0 0 7px rgba(57, 255, 20, 0); }
}

.racebar__state {
  flex: none;
  font-weight: 700;
  color: var(--panel);
}

.racebar__sep {
  flex: none;
  width: 1px;
  height: 16px;
  background: var(--line-hard);
}

.racebar__next {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
}

.racebar__k { color: var(--gray); }

.racebar__v {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.racebar__spacer { flex: 1 1 auto; min-width: 8px; }

.racebar__link {
  flex: none;
  padding: 4px 13px;
  border: 1px solid rgba(0, 229, 255, .42);
  border-radius: var(--radius-pill);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.racebar__link:hover {
  background: rgba(0, 229, 255, .16);
  border-color: var(--cyan);
  color: #ffffff;
}

.racebar__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  box-shadow: 0 0 12px rgba(0, 229, 255, .55);
  pointer-events: none;
  transition: transform 110ms linear;
}

/* --- 悬浮胶囊导航 --- */
.navbar {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
}

.navbar__inner {
  width: min(var(--wrap), 100% - var(--gut) * 2);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  padding-block: 14px;
  transition: padding var(--dur) var(--ease);
}

.brand {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--cyan);
  border-radius: var(--radius-sm);
  background: linear-gradient(140deg, rgba(0, 229, 255, .16), rgba(0, 229, 255, 0));
  box-shadow: 3px 3px 0 rgba(0, 229, 255, .18);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.brand:hover .brand__mark {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 rgba(0, 229, 255, .26);
}

.brand__text { display: flex; flex-direction: column; gap: 1px; }

.brand__name {
  font-size: 16px;
  font-weight: 900;
  letter-spacing: .02em;
  color: var(--panel);
  line-height: 1.15;
}

.brand__sub {
  display: block;
  max-height: 16px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--gray);
  line-height: 1.2;
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

/* 胶囊导航 */
.nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 5px;
  border: 1px solid var(--line-hard);
  border-radius: var(--radius-pill);
  background: rgba(17, 20, 24, .78);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05), var(--shadow-soft);
}

.nav__link {
  display: block;
  padding: 8px 15px;
  border-radius: var(--radius-pill);
  color: #A6B3C4;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav__link:hover {
  color: var(--panel);
  background: rgba(0, 229, 255, .12);
}
.nav__link[aria-current="page"] {
  background: var(--cyan);
  color: #04121d;
  font-weight: 800;
}

/* 右侧 */
.navbar__side {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.substate {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  border: 1px dashed var(--line-hard);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray);
}

.substate__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, .16);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-hard);
  border-radius: 12px;
  background: rgba(17, 20, 24, .85);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); }

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--panel);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--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); }

/* 页头收缩态 */
.site-header[data-shrunk] .navbar__inner { padding-block: 8px; }
.site-header[data-shrunk] .brand__sub { max-height: 0; opacity: 0; }
.site-header[data-shrunk] .racebar__inner { height: 34px; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--carbon);
  border-top: 2px solid var(--steel);
}

.footer__inner {
  width: min(var(--wrap), 100% - var(--gut) * 2);
  margin-inline: auto;
  padding-block: clamp(36px, 6vw, 64px);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: clamp(24px, 4vw, 44px);
}

.footer__col { min-width: 0; }

.footer__col--brand { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }

.brand--footer .brand__mark {
  width: 36px;
  height: 36px;
  font-size: 12px;
}

.footer__note {
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}

.footer__badge {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--gray);
}

.footer__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 14px;
}

.footer__list a {
  color: var(--text);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
  display: inline-block;
}
.footer__list a:hover {
  color: var(--cyan);
  transform: translateX(3px);
}

.footer__list--meta { gap: 12px; }

.footer__list--meta li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer__k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--steel);
}

.footer__v {
  color: var(--text);
  font-size: 14px;
  word-break: break-word;
}

.footer__bar {
  border-top: 1px solid var(--line-soft);
  background: rgba(10, 22, 40, .55);
}

.footer__barinner {
  width: min(var(--wrap), 100% - var(--gut) * 2);
  margin-inline: auto;
  padding-block: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--gray);
}

.footer__copy { font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; }

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-size: 13px;
}
.footer__legal a { color: var(--gray); transition: color var(--dur) var(--ease); }
.footer__legal a:hover { color: var(--cyan); }

/* ============================================================
   通用组件
   ============================================================ */

/* 容器 */
.container {
  width: min(var(--wrap), 100% - var(--gut) * 2);
  margin-inline: auto;
}

/* 堆叠面板 */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  background: var(--carbon);
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}
.panel--ink { background: var(--ink-2); }
.panel--cyan { border-color: var(--cyan); }
.panel--amber { border-color: var(--amber); }

/* 前置标签 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--cyan);
}

/* 章节标题带 */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 18px;
  margin-bottom: clamp(22px, 4vw, 40px);
  border-bottom: 2px solid var(--steel);
}

.section-head__title {
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--panel);
  line-height: 1.1;
}

.section-head__desc {
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

/* 正文 */
.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}
.prose p + p { margin-top: 1em; }
.prose ul, .prose ol { display: flex; flex-direction: column; gap: .5em; margin-top: 1em; }
.prose li { padding-left: 18px; position: relative; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

/* 网格 */
.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--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.btn--sm { padding: 8px 15px; font-size: 13px; }

.btn--cyan {
  background: var(--cyan);
  color: #04121d;
  box-shadow: 3px 3px 0 rgba(0, 131, 143, .65);
}
.btn--cyan:hover {
  background: #6ff0ff;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(0, 131, 143, .75);
}

.btn--ghost {
  border-color: var(--line);
  color: var(--cyan);
  background: rgba(0, 229, 255, .06);
}
.btn--ghost:hover {
  background: rgba(0, 229, 255, .16);
  border-color: var(--cyan);
  color: #ffffff;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .5);
}

.btn--amber {
  background: var(--amber);
  color: #1a1200;
  box-shadow: 3px 3px 0 rgba(140, 96, 0, .65);
}
.btn--amber:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(140, 96, 0, .75);
}

.btn--lime {
  background: var(--lime);
  color: #06210a;
  box-shadow: 3px 3px 0 rgba(24, 110, 12, .6);
}
.btn--lime:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(24, 110, 12, .7);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--gray);
  white-space: nowrap;
}
.tag--amber { color: var(--amber); border-color: rgba(255, 179, 0, .42); background: rgba(255, 179, 0, .08); }
.tag--lime  { color: var(--lime);  border-color: rgba(57, 255, 20, .38); background: rgba(57, 255, 20, .07); }
.tag--violet{ color: var(--violet); border-color: rgba(124, 77, 255, .44); background: rgba(124, 77, 255, .1); }

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--steel); }
.breadcrumb a { transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb [aria-current="page"] { color: var(--panel); }

/* 图片容器（页面阶段放置占位图） */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  background:
    radial-gradient(120% 92% at 18% 8%, rgba(0, 229, 255, .16), transparent 56%),
    radial-gradient(90% 70% at 92% 96%, rgba(255, 179, 0, .12), transparent 58%),
    linear-gradient(160deg, #0d1c31 0%, #111418 58%, #0A1628 100%);
}
.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image:
    linear-gradient(rgba(0, 229, 255, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, .09) 1px, transparent 1px);
  background-size: 34px 34px;
}
.img-frame > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame--wide     { aspect-ratio: 21 / 9; }
.img-frame--band     { aspect-ratio: 16 / 6; }
.img-frame--card     { aspect-ratio: 16 / 10; }
.img-frame--portrait { aspect-ratio: 4 / 5; }

/* 显现动效 */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.js-ready [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .nav__link { padding: 8px 11px; font-size: 13px; }
  .substate { display: none; }
}

@media (max-width: 980px) {
  .navbar__inner { padding-block: 12px; }
  .nav-toggle { display: inline-flex; }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    margin: 0;
    background: rgba(10, 22, 40, .985);
    border-bottom: 2px solid var(--steel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 220ms var(--ease), opacity 160ms var(--ease), visibility 160ms var(--ease);
  }
  .nav[data-open] {
    max-height: min(72vh, 480px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 5px;
    padding: 14px var(--gut) 22px;
    border: 0;
    border-radius: 0;
    background: none;
    box-shadow: none;
  }

  .nav__link {
    padding: 13px 16px;
    border: 1px solid rgba(138, 151, 166, .18);
    border-radius: 12px;
    font-size: 15px;
  }

  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__col--brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .racebar__sep { display: none; }
  .racebar__inner { font-size: 11.5px; gap: 11px; }
  .brand__sub { display: none; }
  .section-head { align-items: flex-start; }
  .section-head__desc { max-width: 100%; }
  .img-frame, .img-frame--wide, .img-frame--band, .img-frame--card, .img-frame--portrait {
    aspect-ratio: 16 / 10;
  }
}

@media (max-width: 560px) {
  .racebar__next { display: none; }
  .btn--sm { padding: 7px 12px; font-size: 12.5px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__barinner { flex-direction: column; align-items: flex-start; }
  .panel { box-shadow: var(--shadow-soft); }
}

/* ============================================================
   动效偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js-ready [data-reveal] { opacity: 1; transform: none; }
  .racebar__progress { transition: none; }
}