/* =========================================================
   乐竞赛场 · 共享站点样式 /assets/site.css
   分层：reset → 变量 → 排版 → 外壳 → 通用组件 → 响应式
   ========================================================= */

*,
*::before,
*::after { box-sizing: border-box; }

html, body, h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

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

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

button, input, select, textarea { font: inherit; color: inherit; }

a { color: inherit; }

:root {
  /* 色板 */
  --ink: #070C0A;
  --green-900: #08231C;
  --green-850: #0C2A21;
  --green-800: #123F33;
  --accent: #43F5B5;
  --mint: #A9F7DC;
  --paper: #EAF7F1;
  --steel: #7D9B90;
  --red: #FF5C57;
  --amber: #FFC857;
  --on-accent: #04150F;

  /* 线 / 面 */
  --line: rgba(169, 247, 220, 0.14);
  --line-strong: rgba(169, 247, 220, 0.3);
  --surface: linear-gradient(160deg, rgba(18, 63, 51, 0.94), rgba(12, 42, 33, 0.94));

  /* 字体 */
  --font-display: "Barlow Condensed", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-editorial: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  /* 尺度 */
  --maxw: 1220px;
  --gutter: clamp(1.1rem, 4vw, 2.8rem);
  --radius-sm: 10px;
  --radius-lg: 18px;
  --radius-pill: 999px;
}

html {
  scroll-padding-top: clamp(88px, 13vh, 136px);
  background-color: var(--ink);
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  min-height: 100vh;
  background-color: var(--green-900);
  background-image:
    radial-gradient(880px 520px at 88% -8%, rgba(67, 245, 181, 0.1), transparent 62%),
    radial-gradient(680px 460px at 0% 14%, rgba(67, 245, 181, 0.055), transparent 60%),
    linear-gradient(180deg, #08231C 0%, #061A14 58%, #070C0A 100%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

p { text-wrap: pretty; }

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------------- 跳转链接 ---------------- */

.skip-link {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  padding: 0.6rem 1.15rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: top 0.22s ease;
}

.skip-link:focus {
  top: 0;
}

/* ---------------- 刊头 ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(6, 16, 13, 0.97) 0%, rgba(8, 35, 28, 0.93) 100%);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(67, 245, 181, 0.07), 0 22px 44px -34px rgba(0, 0, 0, 0.95);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.site-header.is-condensed {
  background: linear-gradient(180deg, rgba(4, 12, 10, 0.99) 0%, rgba(7, 26, 20, 0.98) 100%);
  border-bottom-color: rgba(67, 245, 181, 0.34);
}

.header-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-block: 0.9rem 0.4rem;
  transition: padding-block 0.3s ease;
}

.site-header.is-condensed .header-inner {
  padding-block: 0.5rem 0.25rem;
}

.header-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 0.5rem 1.25rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid rgba(169, 247, 220, 0.1);
  transition: padding-bottom 0.3s ease;
}

.site-header.is-condensed .header-top {
  padding-bottom: 0.4rem;
}

.masthead-meta {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--steel);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.brand {
  justify-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.12rem;
  padding: 0.12rem 0.6rem;
  text-decoration: none;
  color: var(--paper);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1;
  letter-spacing: 0.03em;
  color: var(--paper);
  transition: font-size 0.3s ease, color 0.25s ease;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.32em;
  color: var(--accent);
  line-height: 1;
  transition: opacity 0.25s ease;
}

.site-header.is-condensed .brand-name {
  font-size: clamp(1.05rem, 1.9vw, 1.35rem);
}

.site-header.is-condensed .brand-sub {
  opacity: 0.5;
}

.brand:hover .brand-name { color: var(--mint); }

.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.save-hint {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--steel);
  max-width: 22ch;
}

kbd {
  display: inline-block;
  padding: 0.02rem 0.3rem;
  border: 1px solid rgba(169, 247, 220, 0.3);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: rgba(18, 63, 51, 0.75);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--mint);
}

/* 移动端栏目按钮 */

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid rgba(169, 247, 220, 0.28);
  border-radius: var(--radius-pill);
  background: rgba(18, 63, 51, 0.62);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.25s ease, color 0.25s ease, background-color 0.25s ease;
}

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

.nav-toggle[aria-expanded="true"] {
  border-color: var(--accent);
  background: rgba(67, 245, 181, 0.12);
  color: var(--accent);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background-color 0.2s ease;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.25s ease;
}

.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }

.nav-toggle-text { line-height: 1; }

/* 导航 */

.site-nav {
  display: block;
  padding-top: 0.6rem;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(0.3rem, 1.6vw, 1.6rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  position: relative;
  display: block;
  padding: 0.5rem 0.2rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: rgba(234, 247, 241, 0.72);
  text-decoration: none;
  transition: color 0.25s ease;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.16rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s ease;
}

.nav-list a:hover { color: var(--paper); }
.nav-list a:hover::after { transform: scaleX(1); }

.nav-list a[aria-current="page"] { color: var(--accent); }
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

/* 阅读进度 */

.header-progress {
  height: 2px;
  background: rgba(169, 247, 220, 0.09);
  overflow: hidden;
}

.header-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--mint));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.14s linear;
}

/* ---------------- 页脚 ---------------- */

.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, #070C0A 0%, #04100C 46%, #070C0A 100%);
  border-top: 1px solid var(--line);
  color: var(--paper);
}

.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(2.4rem, 5vw, 3.6rem) var(--gutter) 1.4rem;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.05fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  padding-bottom: clamp(1.6rem, 4vw, 2.4rem);
  border-bottom: 1px solid rgba(169, 247, 220, 0.1);
}

.footer-masthead {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  line-height: 1.05;
  letter-spacing: 0.03em;
}

.footer-sub {
  margin-top: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  color: var(--accent);
}

.footer-copy {
  margin-top: 0.9rem;
  max-width: 32ch;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--steel);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem clamp(1rem, 2.5vw, 2rem);
}

.footer-group-title {
  margin-bottom: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.footer-links {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-block;
  padding-bottom: 0.1rem;
  border-bottom: 1px solid transparent;
  font-size: 0.9rem;
  color: rgba(234, 247, 241, 0.78);
  text-decoration: none;
  transition: color 0.22s ease, border-color 0.22s ease;
}

.footer-links a:hover {
  color: var(--accent);
  border-bottom-color: rgba(67, 245, 181, 0.45);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr));
  gap: 1rem clamp(1rem, 3vw, 2.5rem);
  padding-block: clamp(1.4rem, 3vw, 1.9rem) 0.6rem;
  border-bottom: 1px solid rgba(169, 247, 220, 0.1);
}

.contact-item { margin: 0; }

.contact-label {
  margin-bottom: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.contact-value {
  margin-inline-start: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--paper);
  word-break: break-word;
}

.footer-note {
  padding-block: 0.9rem 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--steel);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(169, 247, 220, 0.08);
  margin-top: 0.9rem;
}

.footer-bottom-item {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--steel);
}

/* ---------------- 通用布局 ---------------- */

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(2.4rem, 6vw, 4.5rem); }
.section--tight { padding-block: clamp(1.5rem, 3vw, 2.4rem); }

.grid {
  display: grid;
  gap: clamp(1rem, 2.2vw, 1.6rem);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr)); }

/* 面包屑 */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: clamp(0.9rem, 2vw, 1.3rem) 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--steel);
}

.breadcrumbs a {
  color: var(--steel);
  text-decoration: none;
  transition: color 0.22s ease;
}

.breadcrumbs a:hover { color: var(--accent); }

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: rgba(169, 247, 220, 0.28);
}

/* ---------------- 按钮 ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.35rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.25s ease, color 0.25s ease,
              border-color 0.25s ease, transform 0.25s ease;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--mint);
  border-color: var(--mint);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(169, 247, 220, 0.34);
  color: var(--paper);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-sm {
  padding: 0.42rem 0.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

/* ---------------- 卡片与数据 ---------------- */

.card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.05rem, 2.2vw, 1.55rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), rgba(67, 245, 181, 0));
  opacity: 0.6;
}

.card:hover {
  border-color: rgba(67, 245, 181, 0.4);
  transform: translateY(-2px);
}

.card-title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.card-text {
  margin-top: 0.6rem;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(234, 247, 241, 0.82);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.1;
  color: var(--accent);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--steel);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.18rem 0.62rem;
  border: 1px solid rgba(169, 247, 220, 0.28);
  border-radius: var(--radius-pill);
  background: rgba(67, 245, 181, 0.08);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--mint);
}

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

.pill--amber {
  border-color: rgba(255, 200, 87, 0.45);
  background: rgba(255, 200, 87, 0.1);
  color: var(--amber);
}

.pill--red {
  border-color: rgba(255, 92, 87, 0.45);
  background: rgba(255, 92, 87, 0.1);
  color: var(--red);
}

/* ---------------- 长文阅读 ---------------- */

.prose {
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(234, 247, 241, 0.86);
}

.prose > * + * { margin-top: 1em; }

.prose h2,
.prose h3 {
  margin-top: 1.8em;
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  color: var(--paper);
}

.prose a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(67, 245, 181, 0.4);
}

.prose--light {
  max-width: none;
  padding: clamp(1.25rem, 3vw, 2.5rem);
  border-radius: var(--radius-lg);
  background: var(--paper);
  color: #0A241C;
}

.prose--light a { color: #0B6B4C; border-bottom-color: rgba(11, 107, 76, 0.4); }

/* ---------------- 图片容器 ---------------- */

.media {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, #0C2A21, #07160F);
}

.media > img,
.media > picture > img,
.media > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(67, 245, 181, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(67, 245, 181, 0.13) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 88%);
  mask-image: linear-gradient(180deg, #000, transparent 88%);
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--graphic { aspect-ratio: 4 / 3; }

/* ---------------- 章节目录 ---------------- */

.toc-list {
  display: grid;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc-link {
  display: block;
  padding: 0.42rem 0.8rem;
  border-left: 2px solid rgba(169, 247, 220, 0.16);
  font-size: 0.85rem;
  color: rgba(234, 247, 241, 0.7);
  text-decoration: none;
  transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.toc-link:hover {
  color: var(--paper);
  border-left-color: rgba(169, 247, 220, 0.4);
}

.toc-link[aria-current="true"] {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(67, 245, 181, 0.07);
}

/* ---------------- 返回顶部 ---------------- */

.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 80;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(67, 245, 181, 0.45);
  border-radius: 50%;
  background: rgba(8, 35, 28, 0.94);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease,
              visibility 0.25s ease, border-color 0.25s ease;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover { border-color: var(--accent); }

/* ---------------- 滚动显现 ---------------- */

html[data-reveal-ready="true"] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
}

html[data-reveal-ready="true"] [data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 1080px) {
  .save-hint { display: none; }
}

@media (max-width: 900px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .header-top {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 0.5rem;
    padding-bottom: 0.6rem;
  }

  .masthead-meta { display: none; }

  .brand {
    justify-self: start;
    align-items: flex-start;
    padding-left: 0;
  }

  .header-actions { justify-self: end; }

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

  .site-nav {
    display: none;
    padding-top: 0.7rem;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list li + li { border-top: 1px solid rgba(169, 247, 220, 0.1); }

  .nav-list a {
    padding: 0.72rem 0.75rem;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
  }

  .nav-list a::after { display: none; }

  .nav-list a[aria-current="page"] {
    background: rgba(67, 245, 181, 0.08);
    border-radius: 8px;
  }
}

@media (max-width: 620px) {
  .footer-nav { grid-template-columns: 1fr; }
  .footer-bottom { justify-content: flex-start; }
}

@media (max-width: 480px) {
  .nav-toggle-text { display: none; }
  .header-actions .btn-sm {
    padding: 0.4rem 0.68rem;
    font-size: 0.72rem;
  }
  .brand-sub { letter-spacing: 0.22em; }
}

/* ---------------- 动效降级 ---------------- */

@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[data-reveal-ready="true"] [data-reveal] {
    opacity: 1;
    transform: none;
  }

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