/* ==========================================================================
   KOK赛场 · /assets/site.css
   共享外壳：重置 / 变量 / 中文排版 / 侧边轨道头 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 20px);
}

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1;
}

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

figure,
blockquote {
  margin: 0;
}

ul,
ol {
  margin: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

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

[hidden] {
  display: none !important;
}

/* ---------- 2. 变量 ---------- */
:root {
  /* 色板 */
  --ink-900: #07130F;
  --ink-800: #0C1F18;
  --ink-700: #16352A;
  --ink-600: #2C4F42;
  --aqua: #34F5D0;
  --aqua-soft: #9FFCE8;
  --orange: #FF7A2F;
  --orange-soft: #FFC29E;
  --paper: #EAF3EE;
  --mist: #B9C9C0;
  --white: #FFFFFF;

  --line: rgba(44, 79, 66, 0.85);
  --line-soft: rgba(44, 79, 66, 0.5);
  --aqua-glow: rgba(52, 245, 208, 0.14);
  --mist-faint: rgba(185, 201, 192, 0.55);

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

  /* 尺寸 */
  --rail-w: 104px;
  --rail-w-open: 244px;
  --topbar-h: 64px;
  --content-max: 1440px;
  --pad: clamp(16px, 3vw, 44px);

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 中文排版 ---------- */
h1,
h2,
h3,
h4,
h5 {
  margin: 0;
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 58px);
  letter-spacing: -0.025em;
  line-height: 1.06;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 34px);
  letter-spacing: -0.015em;
}

h3 {
  font-size: clamp(17px, 1.6vw, 21px);
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

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

::selection {
  background: var(--aqua);
  color: #04120e;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--aqua);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--aqua);
  flex: 0 0 auto;
}

.lead {
  font-family: var(--font-editorial);
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.72;
  color: var(--paper);
}

.meta-mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 4. 焦点与跳转 ---------- */
:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--r-sm);
  background: var(--aqua);
  color: #04120e;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.06em;
  transform: translateY(-180%);
  transition: transform 180ms var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: 4px;
}

/* ---------- 5. 布局骨架 ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section {
  padding-block: clamp(36px, 5vw, 64px);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
  margin-bottom: clamp(18px, 2.4vw, 30px);
}

.grid {
  display: grid;
  gap: clamp(14px, 1.6vw, 22px);
}

.surface {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background:
    linear-gradient(158deg, rgba(22, 53, 42, 0.88), rgba(12, 31, 24, 0.94));
  background-blend-mode: normal;
}

.surface::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(234, 243, 238, 0.018) 0 1px,
    transparent 1px 3px
  );
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  transition: background 180ms var(--ease), color 180ms var(--ease),
    border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.btn--accent {
  background: var(--orange);
  border-color: var(--orange);
  color: #1a0a02;
}

.btn--accent:hover {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
  box-shadow: 0 0 22px rgba(255, 122, 47, 0.35);
}

.btn--solid {
  background: var(--aqua);
  border-color: var(--aqua);
  color: #04120e;
}

.btn--solid:hover {
  background: var(--aqua-soft);
  border-color: var(--aqua-soft);
  box-shadow: 0 0 22px rgba(52, 245, 208, 0.35);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(44, 79, 66, 0.95);
  color: var(--paper);
}

.btn--ghost:hover {
  border-color: var(--aqua);
  color: var(--aqua-soft);
  background: rgba(52, 245, 208, 0.06);
}

/* ---------- 7. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(22, 53, 42, 0.85);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  line-height: 1.5;
}

.tag--live {
  color: var(--aqua);
  border-color: rgba(52, 245, 208, 0.45);
  background: rgba(52, 245, 208, 0.08);
}

.tag--hot {
  color: #1a0a02;
  border-color: var(--orange-soft);
  background: var(--orange-soft);
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist-faint);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li:not(:last-child)::after {
  content: "›";
  color: var(--ink-600);
}

.breadcrumb a {
  color: var(--aqua-soft);
  transition: color 160ms var(--ease);
}

.breadcrumb a:hover {
  color: var(--aqua);
}

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

/* ---------- 9. 图片容器 ---------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-700);
  isolation: isolate;
}

.figure__media {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: linear-gradient(150deg, #16352a 0%, #0c1f18 55%, #0a1a15 100%);
  filter: saturate(0.78) contrast(1.06);
}

.figure--wide .figure__media {
  aspect-ratio: 21 / 9;
}

.figure--square .figure__media {
  aspect-ratio: 1 / 1;
}

.figure--tall .figure__media {
  aspect-ratio: 3 / 4;
}

.figure__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(7, 19, 15, 0) 42%,
    rgba(7, 19, 15, 0.84) 100%
  );
}

.figure__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 14px 16px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--paper);
}

.figure__kicker {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--aqua);
}

/* ---------- 10. 侧边轨道头 ---------- */
.site-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  width: var(--rail-w);
  padding: 20px 0 18px;
  background:
    radial-gradient(120% 55% at 0% 0%, rgba(52, 245, 208, 0.08), transparent 62%),
    linear-gradient(180deg, #061210 0%, #07130f 46%, #04100c 100%);
  border-right: 1px solid var(--line);
  overflow: hidden auto;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-600) transparent;
  transition: width 260ms var(--ease);
}

.site-rail::-webkit-scrollbar {
  width: 4px;
}

.site-rail::-webkit-scrollbar-thumb {
  background: var(--ink-600);
  border-radius: 2px;
}

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

.rail__brand {
  padding-bottom: 16px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
}

.rail__brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 2px 20px;
  color: var(--paper);
}

.rail__mark {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(52, 245, 208, 0.35);
  border-radius: 13px;
  background: rgba(52, 245, 208, 0.1);
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--aqua);
}

.rail__brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

.rail__name {
  font-size: 14px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--white);
  white-space: nowrap;
}

.rail__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--mist-faint);
  white-space: nowrap;
}

.rail__toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(22, 53, 42, 0.55);
  color: var(--paper);
  cursor: pointer;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.rail__toggle:hover {
  border-color: rgba(52, 245, 208, 0.6);
  background: rgba(52, 245, 208, 0.08);
}

.rail__toggle-bars {
  display: grid;
  gap: 5px;
  width: 17px;
}

.rail__toggle-bar {
  display: block;
  width: 17px;
  height: 2px;
  border-radius: 2px;
  background: var(--aqua);
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.site-rail[data-open] .rail__toggle-bar:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

.site-rail[data-open] .rail__toggle-bar:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

.rail__toggle-text {
  font-family: var(--font-display);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}

.rail__nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1 1 auto;
  min-height: 0;
}

.rail__nav-label {
  margin: 8px 0 0;
  padding: 0 20px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(185, 201, 192, 0.45);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 200ms var(--ease);
}

.site-rail:hover .rail__nav-label,
.site-rail:focus-within .rail__nav-label {
  opacity: 1;
}

.rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail__item {
  margin: 0;
}

.rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--mist);
  white-space: nowrap;
  transition: color 170ms var(--ease), background 170ms var(--ease);
}

.rail__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  bottom: 9px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: transparent;
  transition: background 170ms var(--ease), box-shadow 170ms var(--ease);
}

.rail__link:hover {
  color: var(--aqua-soft);
  background: rgba(52, 245, 208, 0.06);
}

.rail__link[aria-current="page"] {
  color: var(--aqua);
  background: rgba(52, 245, 208, 0.1);
}

.rail__link[aria-current="page"]::before {
  background: var(--aqua);
  box-shadow: 0 0 14px rgba(52, 245, 208, 0.6);
}

.rail__index {
  flex: 0 0 18px;
  width: 18px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--mist-faint);
  transition: color 170ms var(--ease);
}

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

.rail__label {
  font-size: 13.5px;
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

.site-rail:hover .rail__label,
.site-rail:focus-within .rail__label {
  opacity: 1;
  transform: none;
}

.rail__foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 16px 20px 0;
  border-top: 1px solid var(--line-soft);
  opacity: 0;
  transition: opacity 220ms var(--ease);
}

.site-rail:hover .rail__foot,
.site-rail:focus-within .rail__foot {
  opacity: 1;
}

.rail__status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--mist);
  white-space: nowrap;
}

.rail__dot {
  flex: 0 0 6px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--aqua);
  box-shadow: 0 0 10px rgba(52, 245, 208, 0.85);
  animation: kokPulse 2.6s ease-in-out infinite;
}

@keyframes kokPulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.45;
    transform: scale(0.82);
  }
}

.rail__cta {
  width: 100%;
  padding: 9px 12px;
  font-size: 11px;
  letter-spacing: 0.05em;
}

/* ---------- 11. 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  padding: clamp(40px, 6vw, 72px) 0 28px;
  background:
    linear-gradient(180deg, rgba(22, 53, 42, 0.42), rgba(7, 19, 15, 0) 58%),
    var(--ink-800);
  border-top: 1px solid var(--line);
  color: var(--mist);
}

.site-foot::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(120px, 18vw, 260px);
  height: 2px;
  background: linear-gradient(90deg, var(--aqua), var(--orange) 70%, transparent);
  opacity: 0.9;
}

.foot__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 48px);
}

.foot__brand {
  min-width: 0;
}

.foot__logo {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.foot__logo-tail {
  color: var(--aqua);
}

.foot__tagline {
  margin: 0 0 16px;
  max-width: 26ch;
  font-family: var(--font-editorial);
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

.foot__stat {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--mist-faint);
}

.foot__stat-num {
  font-size: 15px;
  color: var(--orange);
  letter-spacing: 0;
}

.foot__col {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.foot__title {
  margin: 0 0 14px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--aqua-soft);
}

.foot__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.foot__link {
  display: inline-block;
  font-size: 14px;
  color: var(--mist);
  transition: color 170ms var(--ease), transform 170ms var(--ease);
}

.foot__link:hover {
  color: var(--aqua);
  transform: translateX(3px);
}

.foot__contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.foot__contact-key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-faint);
}

.foot__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 28px;
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}

.foot__legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist-faint);
}

.foot__note {
  margin: 0;
  max-width: 62ch;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(185, 201, 192, 0.62);
}

/* ---------- 12. 阅读进度与入场 ---------- */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 2px;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(
    90deg,
    var(--aqua) 0%,
    var(--aqua-soft) 62%,
    var(--orange) 100%
  );
  box-shadow: 0 0 12px rgba(52, 245, 208, 0.45);
  transition: transform 90ms linear;
}

html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}

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

[data-section].is-current {
  position: relative;
}

[data-toc-link].is-current {
  color: var(--aqua);
}

/* ---------- 13. 桌面端与平板 ---------- */
@media (min-width: 1024px) {
  body {
    padding-left: var(--rail-w);
  }

  .foot__inner {
    grid-template-columns: 1.6fr 1fr 1fr 0.9fr 1.3fr;
  }
}

@media (min-width: 768px) and (max-width: 1023.98px) {
  .foot__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .foot__brand {
    grid-column: 1 / -1;
  }
}

/* ---------- 14. 移动端：轨道收为顶栏 + 抽屉 ---------- */
@media (max-width: 1023.98px) {
  body {
    padding-top: var(--topbar-h);
  }

  .site-rail {
    inset: 0 0 auto 0;
    width: 100%;
    height: var(--topbar-h);
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 0 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    overflow: visible;
    transition: none;
  }

  .site-rail:hover,
  .site-rail:focus-within {
    width: 100%;
  }

  .rail__brand {
    padding: 0;
    margin: 0;
    border-bottom: 0;
  }

  .rail__brand-link {
    gap: 10px;
    padding: 0;
  }

  .rail__mark {
    flex-basis: 34px;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    font-size: 10px;
  }

  .rail__brand-text {
    opacity: 1;
    transform: none;
  }

  .rail__name {
    font-size: 13.5px;
  }

  .rail__toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .rail__nav {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    z-index: 95;
    gap: 10px;
    max-height: 0;
    padding: 0 16px;
    overflow: hidden;
    background: linear-gradient(180deg, #0b201a 0%, #07130f 100%);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
    transition: max-height 300ms var(--ease);
  }

  .site-rail[data-open] .rail__nav {
    max-height: calc(100vh - var(--topbar-h));
    padding: 18px 16px 22px;
    overflow-y: auto;
  }

  .rail__nav-label {
    opacity: 1;
    padding: 0;
    margin: 0 0 4px;
  }

  .rail__link {
    padding: 12px 12px;
    border-radius: var(--r-sm);
  }

  .rail__link::before {
    top: 11px;
    bottom: 11px;
    left: 0;
    width: 3px;
  }

  .rail__label {
    opacity: 1;
    transform: none;
    font-size: 14.5px;
  }

  .rail__foot {
    margin-top: 6px;
    padding: 16px 0 0;
    opacity: 1;
  }

  .rail__cta {
    padding: 12px 14px;
    font-size: 12px;
  }

  .read-progress {
    top: 0;
  }
}

/* ---------- 15. 减少动效 ---------- */
@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;
  }

  .site-rail {
    transition: none;
  }

  .read-progress {
    transition: none;
  }

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