/* =========================================================
   天行赛场 · 共享样式 /assets/site.css
   深墨蓝网格底 + 荧光青绿定位 + 信号橙入口
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

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%; }

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

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

table { border-collapse: collapse; }

:where(h1, h2, h3, h4) { line-height: 1.08; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色板 */
  --ink: #07131F;
  --ink-2: #0B1E30;
  --tactical: #12384A;
  --mint: #39F2C0;
  --orange: #FF8A3D;
  --white: #F2F8FA;
  --mist: #9CB3C0;
  --deep: #041018;
  --lime: #D8FF6A;
  --mute: #2B6F7E;

  /* 字体 */
  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* 字号阶梯 */
  --step-hero: clamp(3.4rem, 9vw, 8rem);
  --step-h2: clamp(1.8rem, 3.6vw, 3rem);
  --step-body: 1rem;
  --step-cap: 0.8125rem;

  /* 网格与节奏 */
  --shell: 1200px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --rule: 1px solid rgba(18, 56, 74, 0.95);
  --rule-mint: 1px solid rgba(57, 242, 192, 0.22);
}

/* ---------- 3. 基础排版 ---------- */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(90deg, rgba(18, 56, 74, 0.32) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(18, 56, 74, 0.32) 0 1px, transparent 1px 88px);
  color: var(--white);
  font-family: var(--font-body);
  font-size: var(--step-body);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-stretch: condensed;
}

h1 { font-size: var(--step-hero); }
h2 { font-size: var(--step-h2); }

p { max-width: 42ch; }

strong { font-weight: 800; color: var(--white); }

:target { scroll-margin-top: 140px; }

/* ---------- 4. 通用工具 ---------- */
.shell {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
}

.shell--wide { max-width: 1440px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

/* ---------- 5. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -6rem;
  z-index: 200;
  padding: 0.7rem 1.15rem;
  background: var(--mint);
  color: var(--deep);
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 0.45rem;
}

/* ---------- 6. 站点头部 ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(7, 19, 31, 0.94);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid rgba(18, 56, 74, 0.85);
  transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

.site-head.is-stuck {
  background: rgba(4, 16, 24, 0.97);
  border-bottom-color: rgba(57, 242, 192, 0.34);
  box-shadow: 0 22px 46px -30px rgba(0, 0, 0, 0.95);
}

/* 路径条 */
.path-strip {
  background: var(--deep);
  border-bottom: 1px solid rgba(18, 56, 74, 0.9);
}

.path-strip__inner {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
  min-height: 30px;
  padding: 0.32rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--mist);
  overflow: hidden;
}

.path-strip__home {
  color: var(--mist);
  white-space: nowrap;
  transition: color 0.2s ease;
}

.path-strip__home:hover { color: var(--white); }

.path-strip__sep {
  color: var(--mute);
  flex: 0 0 auto;
}

.path-strip__sep::before { content: "/"; }

.path-strip__node {
  color: var(--mint);
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.path-strip__links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex: 0 0 auto;
}

.path-strip__link {
  position: relative;
  color: var(--orange);
  white-space: nowrap;
  padding-bottom: 1px;
}

.path-strip__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.path-strip__link:hover::after { transform: scaleX(1); }

/* 悬浮胶囊 */
.head-capsule {
  position: relative;
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin: 0.5rem auto 0.55rem;
  padding: 0.4rem 0.45rem 0.4rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: linear-gradient(118deg, rgba(11, 30, 48, 0.96), rgba(18, 56, 74, 0.6));
  border: 1px solid rgba(57, 242, 192, 0.18);
  border-radius: 999px;
  transition: padding 0.25s ease, border-color 0.25s ease;
}

.site-head.is-stuck .head-capsule {
  border-color: rgba(57, 242, 192, 0.3);
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 0 auto;
  padding: 0.2rem 0;
}

.brand__mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: var(--mint);
  color: var(--deep);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0;
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  flex: 0 0 auto;
  transition: background-color 0.2s ease;
}

.brand:hover .brand__mark { background: var(--lime); }

.brand__lock {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--white);
}

.brand__en {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.24em;
  color: var(--mist);
  margin-top: 0.3rem;
  transition: opacity 0.25s ease;
}

.site-head.is-stuck .brand__en { opacity: 0.62; }

/* 移动开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid rgba(57, 242, 192, 0.3);
  border-radius: 999px;
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
  flex: 0 0 auto;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--mint);
  transition: transform 0.25s ease;
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: translateY(-4px) rotate(-45deg);
}

.nav-toggle__label { line-height: 1; }

/* 导航 */
.nav {
  margin-left: auto;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav__item { display: block; }

.nav__link {
  position: relative;
  display: block;
  padding: 0.5rem 0.7rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--mist);
  border-radius: 999px;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav__link:hover {
  color: var(--white);
  background: rgba(57, 242, 192, 0.09);
}

.nav__link[aria-current="page"] {
  color: var(--mint);
  background: rgba(57, 242, 192, 0.13);
}

.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: 0.2rem;
  height: 1px;
  background: var(--mint);
}

/* 头部 CTA */
.head-cta {
  flex: 0 0 auto;
  padding: 0.55rem 1.05rem;
  background: var(--orange);
  color: var(--deep);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  border-radius: 999px;
  white-space: nowrap;
  transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.head-cta:hover {
  background: #FFA163;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -10px rgba(255, 138, 61, 0.9);
}

/* ---------- 7. 站点页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--deep);
  border-top: 1px solid rgba(57, 242, 192, 0.18);
}

.site-foot::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--mint) 28%, var(--orange) 76%, transparent);
  opacity: 0.55;
}

.foot__inner {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

.foot__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: clamp(2rem, 4vw, 2.75rem);
}

.foot__brand-block { min-width: 0; }

.foot__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.foot__brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--mint);
  color: var(--deep);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 900;
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  flex: 0 0 auto;
}

.foot__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.foot__brand-name {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--white);
}

.foot__brand-en {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.24em;
  color: var(--mist);
  margin-top: 0.32rem;
}

.foot__tagline {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--white);
  margin-top: 1.15rem;
  max-width: 24ch;
}

.foot__note {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--mist);
  margin-top: 0.6rem;
  max-width: 30ch;
}

.foot__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
  min-width: 0;
}

.foot__col { min-width: 0; }

.foot__col-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--mint);
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(18, 56, 74, 0.95);
}

.foot__links {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.foot__link {
  position: relative;
  display: inline-block;
  padding: 0.3rem 0;
  font-size: 0.9375rem;
  color: var(--mist);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.foot__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--orange);
  transform: translateY(-50%);
  transition: width 0.2s ease;
}

.foot__link:hover {
  color: var(--white);
  padding-left: 0.9rem;
}

.foot__link:hover::before { width: 0.6rem; }

.foot__contact {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem clamp(1rem, 3vw, 2rem);
  padding: clamp(1.25rem, 3vw, 1.75rem) 0;
  border-top: 1px solid rgba(18, 56, 74, 0.95);
  border-bottom: 1px solid rgba(18, 56, 74, 0.95);
}

.foot__contact-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.foot__contact-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.foot__contact-value {
  font-size: 0.9375rem;
  color: var(--white);
  overflow-wrap: anywhere;
}

.foot__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  padding: 1.15rem 0 2rem;
  font-size: 0.8125rem;
  color: var(--mist);
}

.foot__copyright { max-width: none; }

.foot__icp {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  max-width: none;
}

.foot__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--mute);
  max-width: none;
}

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.3rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  border-radius: 0;
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn--primary {
  background: var(--mint);
  color: var(--deep);
}

.btn--primary:hover {
  background: #5CF7CD;
  transform: translateY(-2px);
}

.btn--signal {
  background: var(--orange);
  color: var(--deep);
}

.btn--signal:hover {
  background: #FFA163;
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(242, 248, 250, 0.28);
}

.btn--ghost:hover {
  color: var(--mint);
  border-color: var(--mint);
  transform: translateY(-2px);
}

/* ---------- 9. 标签 / 面板 / 面包屑 / 正文 ---------- */
.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--mint);
  background: rgba(57, 242, 192, 0.07);
  border: 1px solid rgba(57, 242, 192, 0.35);
}

.tag--signal {
  color: var(--orange);
  background: rgba(255, 138, 61, 0.08);
  border-color: rgba(255, 138, 61, 0.45);
}

.tag--muted {
  color: var(--mist);
  background: transparent;
  border-color: rgba(156, 179, 192, 0.3);
}

.panel {
  background: var(--ink-2);
  border: var(--rule);
  border-left: 2px solid var(--mint);
  padding: clamp(1.1rem, 2.4vw, 1.75rem);
}

.breadcrumb { margin-bottom: 1.25rem; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.breadcrumb__link {
  color: var(--mist);
  transition: color 0.2s ease;
}

.breadcrumb__link:hover { color: var(--orange); }

.breadcrumb__sep {
  color: var(--mute);
}

.breadcrumb__current { color: var(--mint); }

.prose {
  max-width: 68ch;
  color: rgba(242, 248, 250, 0.86);
  line-height: 1.85;
}

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

.prose > p { max-width: none; }

.pullquote {
  font-family: var(--font-serif);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  line-height: 1.8;
  color: var(--white);
  border-left: 1px solid var(--mint);
  padding-left: clamp(1rem, 2vw, 1.6rem);
  margin: 1.75rem 0;
  max-width: 36ch;
}

/* ---------- 10. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid rgba(57, 242, 192, 0.16);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(135deg, rgba(18, 56, 74, 0.85), rgba(11, 30, 48, 0.95)),
    repeating-linear-gradient(90deg, rgba(57, 242, 192, 0.14) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(0deg, rgba(57, 242, 192, 0.1) 0 1px, transparent 1px 40px);
}

.media-frame > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  z-index: 2;
  right: -22%;
  bottom: -65%;
  width: 58%;
  height: 130%;
  background: linear-gradient(90deg, transparent, rgba(57, 242, 192, 0.16));
  transform: rotate(-18deg);
  pointer-events: none;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 4 / 5; }

.media-caption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--mist);
  max-width: none;
}

/* ---------- 11. 滚动显现 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}

html.js-reveal [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 12. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: clamp(0.9rem, 3vw, 2rem);
  bottom: clamp(0.9rem, 3vw, 2rem);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0.95rem;
  background: var(--ink-2);
  border: 1px solid rgba(57, 242, 192, 0.38);
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.to-top:hover {
  background: var(--mint);
  color: var(--deep);
  transform: translateY(-3px);
}

.to-top[hidden] { display: none; }

.to-top__arrow {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 7px solid currentColor;
}

.to-top__text { line-height: 1; }

/* ---------- 13. 响应式 ---------- */
@media (min-width: 901px) {
  .foot__top {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.6fr);
    align-items: start;
  }
}

@media (max-width: 1024px) {
  .head-capsule {
    padding: 0.4rem 0.45rem 0.4rem 0.85rem;
    gap: 0.5rem;
    border-radius: 22px;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
    order: 2;
  }

  .head-cta { display: none; }

  .nav {
    order: 3;
    position: absolute;
    top: calc(100% + 0.55rem);
    left: 0;
    right: 0;
    margin: 0;
    display: none;
    padding: 0.55rem;
    background: linear-gradient(160deg, rgba(11, 30, 48, 0.99), rgba(4, 16, 24, 0.99));
    border: 1px solid rgba(57, 242, 192, 0.22);
    border-radius: 16px;
    box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.95);
  }

  .nav[data-open="true"] { display: block; }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.1rem;
  }

  .nav__item { width: 100%; }

  .nav__link {
    padding: 0.8rem 0.9rem;
    border-radius: 10px;
    font-size: 0.9375rem;
    color: var(--white);
  }

  .nav__link[aria-current="page"] {
    color: var(--mint);
    background: rgba(57, 242, 192, 0.12);
    box-shadow: inset 2px 0 0 var(--mint);
  }

  .nav__link[aria-current="page"]::after { display: none; }
}

@media (max-width: 720px) {
  .path-strip__inner {
    font-size: 0.6875rem;
    gap: 0.4rem;
  }

  .path-strip__links { display: none; }
}

@media (max-width: 640px) {
  .foot__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot__contact { grid-template-columns: minmax(0, 1fr); }
  .foot__legal {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
  .foot__tagline { max-width: none; }
  .foot__note { max-width: none; }
  .to-top__text { display: none; }
  .to-top { padding: 0.7rem 0.75rem; }
}

@media (max-width: 480px) {
  .brand__en { display: none; }
  .brand__name { font-size: 0.9375rem; }
  .brand__mark { width: 26px; height: 26px; font-size: 0.85rem; }
  .nav-toggle__label { display: none; }
  .nav-toggle { padding: 0.55rem 0.7rem; }
}

/* ---------- 14. 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .head-cta:hover,
  .btn:hover,
  .to-top:hover,
  .foot__link:hover {
    transform: none;
  }
}

/* ---------- 15. 打印 ---------- */
@media print {
  .site-head,
  .to-top {
    display: none;
  }

  body {
    background: #FFFFFF;
    color: #111111;
  }

  .site-foot {
    background: #FFFFFF;
    border-top: 1px solid #111111;
    color: #111111;
  }
}